WO2009084809A1 - Apparatus and method for controlling screen by using touch screen - Google Patents

Apparatus and method for controlling screen by using touch screen Download PDF

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Publication number
WO2009084809A1
WO2009084809A1 PCT/KR2008/006554 KR2008006554W WO2009084809A1 WO 2009084809 A1 WO2009084809 A1 WO 2009084809A1 KR 2008006554 W KR2008006554 W KR 2008006554W WO 2009084809 A1 WO2009084809 A1 WO 2009084809A1
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WO
WIPO (PCT)
Prior art keywords
point
touch screen
picture
control unit
dragged
Prior art date
Application number
PCT/KR2008/006554
Other languages
French (fr)
Inventor
Jeong Hun Moon
Tae Yeon Jeon
Hyun Jung Lee
Original Assignee
Nhn Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nhn Corporation filed Critical Nhn Corporation
Publication of WO2009084809A1 publication Critical patent/WO2009084809A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G06F3/04845—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range for image manipulation, e.g. dragging, rotation, expansion or change of colour
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04806—Zoom, i.e. interaction techniques or interactors for controlling the zooming operation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen

Definitions

  • the present invention relates to a device and method for controlling a screen by using a touch screen, and to be more specific, relates to a method and device for scaling up, scaling down or rotating an area touched by a user in a picture displayed on the touch screen.
  • a touch screen is an input device for sensing a touched point or a touching motion, and performing processes if a user touches characters or certain points displayed on the screen by a user's finger or a stylus pen without using other input devices such as a keyboard, a mouse and the like.
  • the touch screen is a combination of a general monitor screen and a touch panel, which has a function capable of recognizing a touch position by emitting invisible infrared rays vertically and horizontally to form a number of grids on the screen when the grids are touched by a fingertip or the like.
  • the touch screen is usually adopted to an information terminal at public areas such as subways, department stores, banks or the like and usually applied to a general terminal as well as a cashier terminal at various kinds of stores.
  • the portable terminal can execute not only applications for performing voice communication and data communication but also applications for playing a game, playing audio and video files, taking pictures and movies and displaying an electronic map.
  • CPU Central Process Unit
  • a memory installed in a portable terminal such as a mobile communication terminal and the like
  • the portable terminal can execute not only applications for performing voice communication and data communication but also applications for playing a game, playing audio and video files, taking pictures and movies and displaying an electronic map.
  • FIG. 1 is an explanation view of a method for scaling up and scaling down an image by using a touch screen in accordance with a conventional technology.
  • the image in case of scaling up an image displayed on the touch screen, the image can be scaled up by touching any two points on the image with user's two fingers and then moving the two fingers faraway from each other.
  • the image can be scaled down by touching any two points on the image with user's two fingers and then moving the two fingers closer to each other.
  • an embodiment of the present invention provides a screen scale control device and method in which an area of an image displayed on a touch screen, which a user wants to scale up or down, can be accurately scaled up or down in size.
  • the embodiment of the present invention provides a screen control device and method in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated just by a simple manipulation.
  • the embodiment of the present invention provides a touch screen user interface in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated, and a base point of the scale change and an amount of the scale change can be also accurately controlled.
  • a screen control device of a touch screen including: a touch sensing unit for sensing a touching motion of a user on the touch screen; and a control unit, if the touching motion sensed by the touch sensing unit is recognized as a motion in which a first and a second point are touched, and then the second point is dragged to a third point while fixing the first point, for changing a scale of a picture while allowing the first point to be a center of the scale change and then displaying the scale-changed picture on the touch screen.
  • control unit displays the picture on the touch screen to be scaled up if the second point is dragged farther away from the first point and displays the picture on the touch screen to be scaled up in proportion to a length or a speed of a movement of the second point or displays the picture on the touch screen to be scaled up discontinuously by a predetermined amount as the second point is dragged.
  • control unit displays the picture on the touch screen to be scaled down if the second point is dragged closer to the first point and displays the picture on the touch screen to be scaled down in proportion to a length or a speed of a movement of the second point or displays the picture on the touch screen to be scaled down discontinuously by a predetermined amount as the second point is dragged.
  • control unit displays the picture on the touch screen to be rotated if the second point is dragged to be rotated around the first point, and displays the picture on the touch screen to be rotated in proportion to a rotation angle or a rotation speed of the second point or displays the picture on the touch screen to be rotated discontinuously by a predetermined rotation angle as the second point is dragged.
  • a screen control method of a touch screen including: sensing a touching motion touching a first point and a second point on the touch screen; sensing a touching motion dragging the second point to a third point while the first point is fixed; changing a scale of a picture while allowing the first point to be a center of the scale change based on the sensed touching motion and displaying the scale-changed picture on the touch screen.
  • a screen scale control device and method in which an area of an image displayed on a touch screen, which a user wants to scale up or down, can be accurately scaled up or down in size.
  • a screen control device and method in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated by a simple manipulation.
  • a touch screen user interface in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated, and a base point of the scale change and an amount of the scale change can be also accurately controlled.
  • Fig. 1 is an explanation view of a method for scaling up and scaling down an image by using a touch screen in accordance with a conventional technology
  • Fig. 2 provides an example view showing an internet web page displayed on the touch screen of a portable terminal
  • Fig. 3 illustrates a detailed configuration of a portable terminal to which a method for controlling a screen by using the touch screen is applied in accordance with an embodiment of the present invention
  • Fig. 4 is an explanation view of a method for scaling up a picture by using the touch screen in accordance with the embodiment of the present invention
  • Fig. 4 is an explanation view of a method for scaling up a picture by using the touch screen in accordance with the embodiment of the present invention
  • Fig. 5 is an explanation view of a method for scaling down a picture by using the touch screen in accordance with the embodiment of the present invention
  • Fig. 6 is an explanation view of a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention
  • Fig. 7 provides a flow chart showing a method for scaling up/scaling down a picture and a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention.
  • connection to or “coupled to” that is used to designate a connection or coupling of one element to another element includes both a case that an element is “directly connected or coupled to” another element and a case that an element is “electrically connected or coupled to” another element via still another element.
  • the term “comprises or includes” and/or “comprising or including” used in the document means that one or more other components, steps, operation and/or existence or addition of elements are not excluded in addition to the described components, steps, operation and/or elements.
  • FIG. 3 illustrates a detailed configuration of a portable terminal to which a method for controlling a screen by using a touch screen is applied in accordance with an embodiment of the present invention.
  • the portable terminal 10 includes a display unit 12, a touch sensing unit 13, an image data storage unit 14 and a control unit 11.
  • portable terminal includes, e.g., a cellular phone, a
  • MP3 player a PDA, a Digital Multimedia Broadcasting (DMB) terminal, a navigation terminal, a game player, a Ubiquitous Robotic Companion (URC), various kinds of embedded devices, and the like.
  • DMB Digital Multimedia Broadcasting
  • URC Ubiquitous Robotic Companion
  • the display unit 12 displays various kinds of information such as a soft keyboard to be displayed on the touch screen, a menu button for operating the portable terminal 10 and characters selected by a user.
  • the display unit 12 displays, e.g., images of pictures or paintings, maps, web pages, movies or the like on the touch screen, and displays them to be scaled up or down, or rotated.
  • the touch sensing unit 13 senses a touching motion for selecting a menu, data, a character or an image displayed on the display unit 12.
  • a touching motion for selecting a menu, data, a character or an image displayed on the display unit 12.
  • the touch sensing unit 13 senses a touch position, a direction of the movement, a length of the movement, and the like of the user's finger or the stylus pen by using a touch sensor, and transmits the sensed result to the control unit 11.
  • the image data storage unit 14 stores therein image data, map data, web page data or the like to be displayed through the display unit 12.
  • the control unit 11 controls the whole operation of the portable terminal 10 and controls the display unit 12 based on a sensing signal from the touch sensing unit 13. That is, if a touching motion is sensed by the touch sensing unit 13, the control unit 11 controls the display unit 12 to display a picture on the touch screen to be scaled up or down, or rotated based on the sensed touching motion.
  • the touch screen may display at least one of images, maps or web pages.
  • the control unit 11 controls the display unit 12 to display the picture on the touch screen to be scaled up, scaled down or rotated while allowing the first point to be a center of the scale change.
  • control unit 11 controls the display unit 12 to display the picture on the touch screen to be scaled up if the second point is dragged farther away from the first point; the control unit 11 controls the display unit 12 to display the picture on the touch screen to be scaled down if the second point is dragged closer to the first point; the control unit 11 controls the display unit 12 to display the picture on the touch screen to be rotated if the second point is dragged to be rotated around the first point.
  • a scale for scaling up or scaling down the picture is proportional to a distance or a speed of the movement of the second point. That is, the longer the second point moves, the more the picture can be scaled up or down, or even if the second point moves the same distance, the more rapidly the second point moves, the more the picture can be scaled up or down.
  • the amount for scaling up or scaling down the picture can be a predetermined one regardless of the distance or the speed of the movement of the second point. That is, the picture on the touch screen can be scaled up or down discon- tinuously by a predetermined amount as the second point is moved.
  • a rotation angle for rotating the picture can be proportional to a rotation angle or a rotation speed of the second point. That is, the bigger the rotation angle of the second point is, the more the picture can be rotated, or even if the second point is rotated by the same rotation angle, the more rapidly the second point is rotated, the more the picture can be rotated.
  • the rotation angle for rotating the picture can be a predetermined angle scale regardless of the rotation angle or the rotation speed of the second point. That is, the picture on the touch screen can be rotated discontinuously by a predetermined rotation angle as the second point is rotated.
  • FIG. 4 is an explanation view of a method for scaling up a picture by using the touch screen in accordance with the embodiment of the present invention.
  • a first point Al and a second point B 1 are points on which a user first touches by using user's two fingers or any one of other touch input devices, and a third point B 2 is a point to which the finger or the touch input device touching on the second point B 1 is dragged.
  • the user wants to scale up the picture displayed on the touch screen while allowing an arbitrary point, for example, the first point Al to be a center of the scale change
  • the user first touches the first point Al which is a base point of the scale change and the second point Bl which is another point and then drags the user's finger or the pen touching on the second point B 1 to the third point B2.
  • the finger or the pen touching on the second point B 1 which is one of the first touch points is dragged to the third point B2, the finger or the pen touching on the first point Al should remain in the same position.
  • a scale for scaling up the image, the map or the web page can be proportional to a distance or a speed of the movement of the second point B 1 to the third point B2. Further, as the another finger moves from the second point B 1 to the third point B2, the picture on the touch screen can be discontinuously scaled up by a predetermined amount.
  • the predetermined amount may be set to be, e.g., 1.5 times, 2 times, 3 times or the like.
  • FIG. 5 is an explanation view of a method for scaling down a picture by using the touch screen in accordance with the embodiment of the present invention.
  • a first point Al and a second point B 1 are points on which a user first touches by using user's two fingers or any one of other touch input devices, and a third point B 2 is a point to which the finger or the touch input device touching on the second point B 1 is dragged.
  • the user wants to scale down the picture displayed on the touch screen while allowing an arbitrary point, e.g., the first point Al to be a center of the scale change
  • the user first touches the first point Al which is a base point of the scale change and the second point Bl which is another point and then drags the user's finger or the pen touching on the second point B 1 to the third point B2.
  • the finger or the pen touching on the second point B 1 which is one of the first touch points is dragged to the third point B2, the finger or the pen touching on the first point Al should remain in the same position.
  • a scale for scaling up the image, the map or the web page can be proportional to a distance or a speed of the movement of the second point B 1 to the third point B2. Further, as the another finger moves from the second point B 1 to the third point B2, the picture on the touch screen can be discontinuously scaled up by a predetermined amount.
  • the predetermined amount may be set to be, e.g., 1/2 times, 1/3 times, 1/6 times or the like.
  • FIG. 6 is an explanation view of a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention.
  • a first point Al and a second point B 1 are points on which a user first touches by using user's two fingers or any one of other touch input devices
  • a third point B 2 and a fourth point B 3 are points to which the finger or the touch input device touched on the second point B 1 is dragged while making an arc shape around the first point Al.
  • the user wants to rotate the picture displayed on the touch screen around an arbitrary point, e.g., the first point Al
  • the user first touches the first point Al which is a center point of the rotating and the second point B 1 which is another point and then drags the user's finger or the pen touching on the second point B 1 to the third point B2 or the fourth point B3 while having a prescribed rotation angle x or y around the first point Al.
  • the finger or the pen touching on the second point B 1 which is one of the first touch points is dragged to the third point B2 or the fourth point B3, the finger or the pen touching on the first point Al should remain in the same position.
  • a rotation angle for rotating the image, the map or the web page can be proportional to a rotation angle x or y or rotation speed of the second point B 1 to the third point B 2 or the fourth point B3. Further, as the another finger moves from the second point Bl to the third point B2 or the fourth point B3, the picture on the touch screen can be discontinuously rotated by a predetermined rotation angle.
  • the predetermined rotation angle may be set to be, e.g., 90 degrees, 180 degrees, 270 degrees or the like.
  • the picture on the touch screen can be discontinuously rotated to the right by 90 degrees, 180 degrees and 270 degrees, or as the user drags the second point B 1 to the left direction of the second point B 1 while making an arc shape, the picture on the touch screen can be discontinuously rotated to the left by 90 degrees, 180 degrees and 270 degrees.
  • Fig. 7 provides a flow chart to show a method for scaling up/scaling down a picture and a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention.
  • step SI l the control unit 11 displays an arbitrary image, map or web page selected by a user on the touch screen through the display unit 12.
  • step S 12 the control unit 11 senses a user's touching motion touching arbitrary two points on the touch screen through the touch sensing unit 13.
  • step S 13 a drag motion at one point of the two points sensed in step
  • S 12 is sensed. For example, as illustrated in Fig. 4 to Fig. 6, after the first touch points Al and Bl are touched, it is sensed that the touch point Bl is dragged to the touch point B2 while the touch point Al is fixed thereon.
  • step S 14 the control unit 11 displays, based on a signal sensed by the touch sensing unit 13, the image, the map or the web page to be scaled up or down, or rotated around the first touch point Al through the display unit 12.
  • the sensed signal can include a touch position, a length of a movement, a speed of a movement and a direction of a movement, a rotation angle, a rotation speed and the like.
  • the user can scale up or down, or rotate the image, the map or the web page around the touch point Al by fixing the touch point Al and dragging the touch point Bl to the touch point B2.
  • the embodiment of the present invention can be implemented by storage medium including computer executable commands such as a program module executed on a computer.
  • the computer readable medium may be any medium accessible by the computer, and it includes both volatile and non- volatile medium, and both detachable and non-detachable medium. Further, the computer readable medium includes both computer storage medium and communication medium.
  • the computer storage medium includes volatile and non- volatile media, and detachable and non- detachable media implemented by a method or technique for storing information such as computer readable commands, data structures, program modules, miscellaneous data, and so forth.
  • the communication medium typically includes computer readable commands, data structures, program modules or miscellaneous data of a modulated data signal such as carrier wave, or a miscellaneous transmission mechanism, and it has an information transmission medium.

Abstract

There is provided a device and method for scaling up, scaling down or rotating an area touched by a user in a picture displayed on the touch screen. The screen control device of a touch screen includes: a touch sensing unit for sensing a touching motion of a user on the touch screen; and a control unit, if the touching motion sensed by the touch sensing unit is recognized as a motion in which a first and a second point are touched, and then the second point is dragged to a third point while fixing the first point, for changing a scale of a picture while allowing the first point to be a center of the scale change and then displaying the scale-changed picture on the touch screen.

Description

Description
APPARATUS AND METHOD FOR CONTROLLING SCREEN
BY USING TOUCH SCREEN
Technical Field
[1] The present invention relates to a device and method for controlling a screen by using a touch screen, and to be more specific, relates to a method and device for scaling up, scaling down or rotating an area touched by a user in a picture displayed on the touch screen. Background Art
[2] A touch screen is an input device for sensing a touched point or a touching motion, and performing processes if a user touches characters or certain points displayed on the screen by a user's finger or a stylus pen without using other input devices such as a keyboard, a mouse and the like.
[3] The touch screen is a combination of a general monitor screen and a touch panel, which has a function capable of recognizing a touch position by emitting invisible infrared rays vertically and horizontally to form a number of grids on the screen when the grids are touched by a fingertip or the like.
[4] Accordingly, if characters or images displayed on the screen having the touch panel are touched by a user's finger, what a user has selected is sensed according to the touched point and then a command word corresponding thereto is processed by a computer, thereby allowing the user to very easily obtain desired information.
[5] With this features, the touch screen is usually adopted to an information terminal at public areas such as subways, department stores, banks or the like and usually applied to a general terminal as well as a cashier terminal at various kinds of stores.
[6] Meanwhile, as a Central Process Unit (CPU) and a memory installed in a portable terminal such as a mobile communication terminal and the like are developed, there have been executed and processed various applications in the portable terminal. Therefore, the portable terminal can execute not only applications for performing voice communication and data communication but also applications for playing a game, playing audio and video files, taking pictures and movies and displaying an electronic map.
[7] As various applications can be performed in the portable terminal, a size of screen of the portable terminal has been getting larger and larger in order to easily use the applications.
[8] As the portable terminal has become miniaturized whereas the screen thereof has become larger, an input device of the portable terminal has been getting changed from a keypad to a touch screen. That is, if the portable terminal includes both a keypad and a screen, a size of the screen becomes relatively smaller. Therefore, there has been generally used a technology of enlarging a relative size of the screen by combining the screen and the input device in one body, that is, by using the touch screen.
[9] However, there remains still a problem that it is difficult to display various kinds of information on one screen even in the portable terminal having the touch screen. This problem is caused by a reason that a screen size of the portable terminal can not be bigger than that of a Personal Computer (PC) used at home.
[10] Especially, when searching an internet web page, viewing an electronic map, viewing a high resolution image file, or the like through the portable terminal, it has often occurred that a user has to scale up and scale down a picture due to the limited screen size of the portable terminal.
[11] Fig. 1 is an explanation view of a method for scaling up and scaling down an image by using a touch screen in accordance with a conventional technology.
[12] Referring to Fig. 1, in case of scaling up an image displayed on the touch screen, the image can be scaled up by touching any two points on the image with user's two fingers and then moving the two fingers faraway from each other.
[13] Meanwhile, in case of scaling down an image displayed on the touch screen, the image can be scaled down by touching any two points on the image with user's two fingers and then moving the two fingers closer to each other.
[14] However, in accordance with the conventional technology as above mentioned, there has been a problem that an image is always scaled up or scaled down while setting the center point of a screen to be a base point of the scale change but can not be scaled up or scaled down allowing a point selected by a user to be a base point of the scale change.
[15] This problem brings inconvenience to users, especially when searching an internet web page through the portable terminal, and the like. For example, as illustrated in Fig. 2, in case an internet web page is displayed on the touch screen of the portable terminal, a user may want to view a scaled-up image of an area A. In this case, in accordance with the conventional technology, there has occurred inconvenience that the user should first scale up the web page while setting the center point of a screen to be a base point of the scale change and then make movements toward the area A several times.
[16] Accordingly, there is a great demand for a development of a technology that a user can scale up or down an image, a map, a web page or the like allowing a point selected by the user to be a base point of the scale change just by a simple manipulation on the portable terminal having the touch screen. Disclosure of Invention
Technical Problem
[17] In view of the foregoing, an embodiment of the present invention provides a screen scale control device and method in which an area of an image displayed on a touch screen, which a user wants to scale up or down, can be accurately scaled up or down in size.
[18] Further, the embodiment of the present invention provides a screen control device and method in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated just by a simple manipulation.
[19] The embodiment of the present invention provides a touch screen user interface in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated, and a base point of the scale change and an amount of the scale change can be also accurately controlled. Technical Solution
[20] In accordance with a first aspect of the present invention, there is provided a screen control device of a touch screen, including: a touch sensing unit for sensing a touching motion of a user on the touch screen; and a control unit, if the touching motion sensed by the touch sensing unit is recognized as a motion in which a first and a second point are touched, and then the second point is dragged to a third point while fixing the first point, for changing a scale of a picture while allowing the first point to be a center of the scale change and then displaying the scale-changed picture on the touch screen.
[21] Here, it is possible that the control unit displays the picture on the touch screen to be scaled up if the second point is dragged farther away from the first point and displays the picture on the touch screen to be scaled up in proportion to a length or a speed of a movement of the second point or displays the picture on the touch screen to be scaled up discontinuously by a predetermined amount as the second point is dragged.
[22] Further, it is possible that the control unit displays the picture on the touch screen to be scaled down if the second point is dragged closer to the first point and displays the picture on the touch screen to be scaled down in proportion to a length or a speed of a movement of the second point or displays the picture on the touch screen to be scaled down discontinuously by a predetermined amount as the second point is dragged.
[23] Moreover, it is possible that the control unit displays the picture on the touch screen to be rotated if the second point is dragged to be rotated around the first point, and displays the picture on the touch screen to be rotated in proportion to a rotation angle or a rotation speed of the second point or displays the picture on the touch screen to be rotated discontinuously by a predetermined rotation angle as the second point is dragged. [24] Further, in accordance with a second aspect of the present invention, there is provided a screen control method of a touch screen including: sensing a touching motion touching a first point and a second point on the touch screen; sensing a touching motion dragging the second point to a third point while the first point is fixed; changing a scale of a picture while allowing the first point to be a center of the scale change based on the sensed touching motion and displaying the scale-changed picture on the touch screen.
Advantageous Effects
[25] In accordance with one means for solving the problems in the present invention, there is provided a screen scale control device and method in which an area of an image displayed on a touch screen, which a user wants to scale up or down, can be accurately scaled up or down in size. [26] In accordance with another means for solving the problems in the present invention, there is also provided a screen control device and method in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated by a simple manipulation. [27] In accordance with still another means for solving the problems in the present invention, there is provided a touch screen user interface in which an image, an electronic map and a web page displayed on the touch screen can be scaled up and down and rotated, and a base point of the scale change and an amount of the scale change can be also accurately controlled.
Brief Description of Drawings [28] Fig. 1 is an explanation view of a method for scaling up and scaling down an image by using a touch screen in accordance with a conventional technology; [29] Fig. 2 provides an example view showing an internet web page displayed on the touch screen of a portable terminal; [30] Fig. 3 illustrates a detailed configuration of a portable terminal to which a method for controlling a screen by using the touch screen is applied in accordance with an embodiment of the present invention; [31] Fig. 4 is an explanation view of a method for scaling up a picture by using the touch screen in accordance with the embodiment of the present invention; [32] Fig. 5 is an explanation view of a method for scaling down a picture by using the touch screen in accordance with the embodiment of the present invention; [33] Fig. 6 is an explanation view of a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention; and [34] Fig. 7 provides a flow chart showing a method for scaling up/scaling down a picture and a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention. Mode for the Invention
[35] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that the present invention may be readily implemented by those skilled in the art. However, it is to be noted that the present invention is not limited to the embodiments but can be realized in various other ways. In drawings, parts irrelevant to the description are omitted for the simplicity of explanation, and like reference numerals denote like parts through the whole document.
[36] Through the whole document, the term "connected to" or "coupled to" that is used to designate a connection or coupling of one element to another element includes both a case that an element is "directly connected or coupled to" another element and a case that an element is "electrically connected or coupled to" another element via still another element. Further, the term "comprises or includes" and/or "comprising or including" used in the document means that one or more other components, steps, operation and/or existence or addition of elements are not excluded in addition to the described components, steps, operation and/or elements.
[37] Hereinafter, with reference to Fig. 3 to Fig. 7, there will be explained a device and method for controlling a screen by using a touch screen in accordance with an embodiment of the present invention.
[38] Fig. 3 illustrates a detailed configuration of a portable terminal to which a method for controlling a screen by using a touch screen is applied in accordance with an embodiment of the present invention.
[39] Referring to Fig. 3, the portable terminal 10 includes a display unit 12, a touch sensing unit 13, an image data storage unit 14 and a control unit 11.
[40] In the present specification, "portable terminal" includes, e.g., a cellular phone, a
MP3 player, a PDA, a Digital Multimedia Broadcasting (DMB) terminal, a navigation terminal, a game player, a Ubiquitous Robotic Companion (URC), various kinds of embedded devices, and the like.
[41] The display unit 12 displays various kinds of information such as a soft keyboard to be displayed on the touch screen, a menu button for operating the portable terminal 10 and characters selected by a user. The display unit 12 displays, e.g., images of pictures or paintings, maps, web pages, movies or the like on the touch screen, and displays them to be scaled up or down, or rotated.
[42] The touch sensing unit 13 senses a touching motion for selecting a menu, data, a character or an image displayed on the display unit 12. To be specific, when the user touches a specific area of an image, a map, a web page displayed on the touch screen with user's finger, a stylus pen or the like in order to scale up or down, or rotate it, or makes a movement (hereinafter, referred to as "drag") with the finger touching on touch screen, the touch sensing unit 13 senses a touch position, a direction of the movement, a length of the movement, and the like of the user's finger or the stylus pen by using a touch sensor, and transmits the sensed result to the control unit 11.
[43] Hereinafter, the present invention will be explained for a case where the user touches the touch screen with user's fingers and drags user's fingers on the screen, but it may be easily understood by those skilled in the art that it is possible to use other touch input device such as a touch pen dedicated to a touch screen, a stylus pen or the like besides the user's fingers.
[44] The image data storage unit 14 stores therein image data, map data, web page data or the like to be displayed through the display unit 12.
[45] The control unit 11 controls the whole operation of the portable terminal 10 and controls the display unit 12 based on a sensing signal from the touch sensing unit 13. That is, if a touching motion is sensed by the touch sensing unit 13, the control unit 11 controls the display unit 12 to display a picture on the touch screen to be scaled up or down, or rotated based on the sensed touching motion. The touch screen may display at least one of images, maps or web pages.
[46] To be specific, if the touching motion sensed by the touch sensing unit 13 is recognized as a motion in which a first and a second point are touched on the touch screen, and then the second point is dragged to a third point while fixing the first point, the control unit 11 controls the display unit 12 to display the picture on the touch screen to be scaled up, scaled down or rotated while allowing the first point to be a center of the scale change.
[47] For example, the control unit 11 controls the display unit 12 to display the picture on the touch screen to be scaled up if the second point is dragged farther away from the first point; the control unit 11 controls the display unit 12 to display the picture on the touch screen to be scaled down if the second point is dragged closer to the first point; the control unit 11 controls the display unit 12 to display the picture on the touch screen to be rotated if the second point is dragged to be rotated around the first point.
[48] At this time, a scale for scaling up or scaling down the picture is proportional to a distance or a speed of the movement of the second point. That is, the longer the second point moves, the more the picture can be scaled up or down, or even if the second point moves the same distance, the more rapidly the second point moves, the more the picture can be scaled up or down.
[49] Further, the amount for scaling up or scaling down the picture can be a predetermined one regardless of the distance or the speed of the movement of the second point. That is, the picture on the touch screen can be scaled up or down discon- tinuously by a predetermined amount as the second point is moved. [50] Meanwhile, a rotation angle for rotating the picture can be proportional to a rotation angle or a rotation speed of the second point. That is, the bigger the rotation angle of the second point is, the more the picture can be rotated, or even if the second point is rotated by the same rotation angle, the more rapidly the second point is rotated, the more the picture can be rotated.
[51] Further, the rotation angle for rotating the picture can be a predetermined angle scale regardless of the rotation angle or the rotation speed of the second point. That is, the picture on the touch screen can be rotated discontinuously by a predetermined rotation angle as the second point is rotated.
[52] Hereinafter, with reference to Fig. 4, a touch screen user interface for scaling up a picture on the touch screen will be explained in accordance with the embodiment of the present invention. Fig. 4 is an explanation view of a method for scaling up a picture by using the touch screen in accordance with the embodiment of the present invention.
[53] Referring to Fig. 4, a first point Al and a second point B 1 are points on which a user first touches by using user's two fingers or any one of other touch input devices, and a third point B 2 is a point to which the finger or the touch input device touching on the second point B 1 is dragged.
[54] To be specific, if the user wants to scale up the picture displayed on the touch screen while allowing an arbitrary point, for example, the first point Al to be a center of the scale change, the user first touches the first point Al which is a base point of the scale change and the second point Bl which is another point and then drags the user's finger or the pen touching on the second point B 1 to the third point B2. Here, while the finger or the pen touching on the second point B 1 which is one of the first touch points is dragged to the third point B2, the finger or the pen touching on the first point Al should remain in the same position.
[55] Accordingly, it is possible for the user to scale up an image, an map or a web page displayed on the touch screen while allowing the first point Al to be a center of the scale change, by touching the first point Al which is the base point where the user wants to zoom in on the touch screen with one finger and by dragging another finger farther away from the first point Al.
[56] In this case, a scale for scaling up the image, the map or the web page can be proportional to a distance or a speed of the movement of the second point B 1 to the third point B2. Further, as the another finger moves from the second point B 1 to the third point B2, the picture on the touch screen can be discontinuously scaled up by a predetermined amount. The predetermined amount may be set to be, e.g., 1.5 times, 2 times, 3 times or the like.
[57] Hereinafter, with reference to Fig. 5, a touch screen user interface for scaling down a picture will be explained in accordance with the embodiment of the present invention. Fig. 5 is an explanation view of a method for scaling down a picture by using the touch screen in accordance with the embodiment of the present invention.
[58] Referring to Fig. 5, a first point Al and a second point B 1 are points on which a user first touches by using user's two fingers or any one of other touch input devices, and a third point B 2 is a point to which the finger or the touch input device touching on the second point B 1 is dragged.
[59] To be specific, if the user wants to scale down the picture displayed on the touch screen while allowing an arbitrary point, e.g., the first point Al to be a center of the scale change, the user first touches the first point Al which is a base point of the scale change and the second point Bl which is another point and then drags the user's finger or the pen touching on the second point B 1 to the third point B2. Here, while the finger or the pen touching on the second point B 1 which is one of the first touch points is dragged to the third point B2, the finger or the pen touching on the first point Al should remain in the same position.
[60] Accordingly, it is possible for the user to scale down an image, an map or a web page displayed on the touch screen while allowing the first point Al to be a center of the scale change, by touching the first point Al which is the base point where the user wants to zoom out on the touch screen with one finger and by dragging another finger closer to the first point Al.
[61] In this case, a scale for scaling up the image, the map or the web page can be proportional to a distance or a speed of the movement of the second point B 1 to the third point B2. Further, as the another finger moves from the second point B 1 to the third point B2, the picture on the touch screen can be discontinuously scaled up by a predetermined amount. The predetermined amount may be set to be, e.g., 1/2 times, 1/3 times, 1/6 times or the like.
[62] Hereinafter, with reference to Fig. 6, a touch screen user interface for rotating a picture will be explained in accordance with the embodiment of the present invention. Fig. 6 is an explanation view of a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention.
[63] Referring to Fig. 6, a first point Al and a second point B 1 are points on which a user first touches by using user's two fingers or any one of other touch input devices, and a third point B 2 and a fourth point B 3 are points to which the finger or the touch input device touched on the second point B 1 is dragged while making an arc shape around the first point Al.
[64] To be specific, if the user wants to rotate the picture displayed on the touch screen around an arbitrary point, e.g., the first point Al, the user first touches the first point Al which is a center point of the rotating and the second point B 1 which is another point and then drags the user's finger or the pen touching on the second point B 1 to the third point B2 or the fourth point B3 while having a prescribed rotation angle x or y around the first point Al. Here, while the finger or the pen touching on the second point B 1 which is one of the first touch points is dragged to the third point B2 or the fourth point B3, the finger or the pen touching on the first point Al should remain in the same position.
[65] Accordingly, it is possible for the user to rotate an image, an map or a web page displayed on the touch screen around the first point Al, by touching the first point Al which is the center point where the user wants to rotate on the touch screen with one finger and by dragging another finger from the second point Bl to the third point B2 or the fourth point B3.
[66] In this case, a rotation angle for rotating the image, the map or the web page can be proportional to a rotation angle x or y or rotation speed of the second point B 1 to the third point B 2 or the fourth point B3. Further, as the another finger moves from the second point Bl to the third point B2 or the fourth point B3, the picture on the touch screen can be discontinuously rotated by a predetermined rotation angle. The predetermined rotation angle may be set to be, e.g., 90 degrees, 180 degrees, 270 degrees or the like.
[67] If the predetermined rotation angle is, e.g., 90 degrees, as the user drags the second point B 1 to the right direction of the second point B 1 while making an arc shape, the picture on the touch screen can be discontinuously rotated to the right by 90 degrees, 180 degrees and 270 degrees, or as the user drags the second point B 1 to the left direction of the second point B 1 while making an arc shape, the picture on the touch screen can be discontinuously rotated to the left by 90 degrees, 180 degrees and 270 degrees.
[68] Fig. 7 provides a flow chart to show a method for scaling up/scaling down a picture and a method for rotating a picture by using the touch screen in accordance with the embodiment of the present invention.
[69] In step SI l, the control unit 11 displays an arbitrary image, map or web page selected by a user on the touch screen through the display unit 12.
[70] In step S 12, the control unit 11 senses a user's touching motion touching arbitrary two points on the touch screen through the touch sensing unit 13.
[71] Subsequently, in step S 13, a drag motion at one point of the two points sensed in step
S 12 is sensed. For example, as illustrated in Fig. 4 to Fig. 6, after the first touch points Al and Bl are touched, it is sensed that the touch point Bl is dragged to the touch point B2 while the touch point Al is fixed thereon.
[72] In step S 14, the control unit 11 displays, based on a signal sensed by the touch sensing unit 13, the image, the map or the web page to be scaled up or down, or rotated around the first touch point Al through the display unit 12. Here, the sensed signal can include a touch position, a length of a movement, a speed of a movement and a direction of a movement, a rotation angle, a rotation speed and the like.
[73] Accordingly, while touching the touch points Al and Bl with user's two fingers, the user can scale up or down, or rotate the image, the map or the web page around the touch point Al by fixing the touch point Al and dragging the touch point Bl to the touch point B2.
[74] The embodiment of the present invention can be implemented by storage medium including computer executable commands such as a program module executed on a computer. The computer readable medium may be any medium accessible by the computer, and it includes both volatile and non- volatile medium, and both detachable and non-detachable medium. Further, the computer readable medium includes both computer storage medium and communication medium. The computer storage medium includes volatile and non- volatile media, and detachable and non- detachable media implemented by a method or technique for storing information such as computer readable commands, data structures, program modules, miscellaneous data, and so forth. The communication medium typically includes computer readable commands, data structures, program modules or miscellaneous data of a modulated data signal such as carrier wave, or a miscellaneous transmission mechanism, and it has an information transmission medium.
[75] The above description of the present invention is provided for the purpose of illustration, and it would be understood by those skilled in the art that various changes and modifications may be made without changing technical conception and essential features of the present invention. Thus, it is clear that the above-described embodiments are illustrative in all aspects and do not limit the present invention. For example, each component described to be of a single type can be implemented in a separated manner. Likewise, components described to be separated can be implemented in a combined manner.
[76] The scope of the present invention is defined by the following claims rather than by the detailed description of the embodiment. It shall be understood that all modifications and embodiments conceived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention.

Claims

Claims
[I] A screen control device of a touch screen, the device comprising: a touch sensing unit for sensing a touching motion of a user on the touch screen; and a control unit, if the touching motion sensed by the touch sensing unit is recognized as a motion in which a first and a second point are touched, and then the second point is dragged to a third point while fixing the first point, for changing a scale of a picture while allowing the first point to be a center of the scale change and then displaying the scale-changed picture on the touch screen. [2] The device of claim 1, wherein the control unit displays the picture on the touch screen to be scaled up if the second point is dragged farther away from the first point. [3] The device of claim 2, wherein the control unit displays the picture on the touch screen to be scaled up in proportion to a length of a movement of the second point. [4] The device of claim 2, wherein the control unit displays the picture on the touch screen to be scaled up in proportion to a speed of a movement of the second point. [5] The device of claim 2, wherein the control unit displays the picture on the touch screen to be scaled up discontinuously by a predetermined amount as the second point is dragged. [6] The device of claim 1, wherein the control unit displays the picture on the touch screen to be scaled down if the second point is dragged closer to the first point. [7] The device of claim 6, wherein the control unit displays the picture on the touch screen to be scaled down in proportion to a length of a movement of the second point. [8] The device of claim 6, wherein the control unit displays the picture on the touch screen to be scaled down in proportion to a speed of a movement of the second point. [9] The device of claim 6, wherein the control unit displays the picture on the touch screen to be scaled down discontinuously by a predetermined amount as the second point is dragged. [10] The device of claim 1, wherein the control unit displays the picture on the touch screen to be rotated if the second point is dragged to be rotated around the first point.
[I I] The device of claim 10, wherein the control unit displays the picture on the touch screen to be rotated in proportion to a rotation angle of the second point. [12] The device of claim 10, wherein the control unit displays the picture on the touch screen to be rotated in proportion to a rotation speed of the second point. [13] The device of claim 10, wherein the control unit displays the picture on the touch screen to be rotated discontinuously by a predetermined rotation angle as the second point is dragged. [14] The device of claim 1, wherein the picture on the touch screen displays at least one of images, maps or web pages. [15] A screen control method of a touch screen, the method comprising: sensing a touching motion touching a first point and a second point on the touch screen; sensing a touching motion dragging the second point to a third point while the first point is fixed; changing a scale of a picture while allowing the first point to be a center of the scale change based on the sensed touching motion and displaying the scale- changed picture on the touch screen. [16] The method of claim 15, wherein the picture is scaled up and displayed if the second point is dragged farther away from the first point. [17] The method of claim 15, wherein the picture is scaled down and displayed if the second point is dragged closer to the first point. [18] The method of claim 15, wherein the picture is rotated and displayed if the second point is dragged to be rotated around the first point. [19] The method of claim 15, wherein the picture is displayed after being scaled up or down, or rotated in proportion to an amount or a speed of the movement of the second point when the second point is dragged.
PCT/KR2008/006554 2007-12-27 2008-11-07 Apparatus and method for controlling screen by using touch screen WO2009084809A1 (en)

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