WO2002042837A9 - Flüssigkristallanzeigevorrichtung mit optoelektronischem bauelement und verfahren zum steuern der hinterleuchtung einer solchen anzeigevorrichtung - Google Patents
Flüssigkristallanzeigevorrichtung mit optoelektronischem bauelement und verfahren zum steuern der hinterleuchtung einer solchen anzeigevorrichtungInfo
- Publication number
- WO2002042837A9 WO2002042837A9 PCT/DE2001/000772 DE0100772W WO0242837A9 WO 2002042837 A9 WO2002042837 A9 WO 2002042837A9 DE 0100772 W DE0100772 W DE 0100772W WO 0242837 A9 WO0242837 A9 WO 0242837A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- display
- optoelectronic component
- light
- light source
- intensity
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13318—Circuits comprising a photodetector
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
Definitions
- the invention relates to an LC display with at least one optoelectronic component and a light source for backlighting the display and to a method for controlling the backlighting.
- the backlighting can be controlled as a function of the ambient brightness. This is particularly advantageous in the case of portable or battery-operated portable devices, since the energy consumption of a backlight is very high.
- a light sensor usually a photodiode, must measure the light intensity of the ambient light falling on the display as precisely as possible.
- a favorable arrangement of the sensor is problematic, especially for small devices. In particular, unintentional shadowing, for example by the hands of a user, must be avoided. Similar problems occur with infrared sensors for receiving signals from an electronic device (e.g. remote control), which are often also arranged in the vicinity of a display.
- the optoelectronic component By arranging the optoelectronic component behind the liquid crystal layer of the display, the optoelectronic component is well protected and covered, but can still sense incident light and thus detect the intensity of the light or transmitted signals. Furthermore, the optoelectronic component can optionally send signals through the liquid crystal layer to an external device.
- the infrared spectrum is particularly suitable for data exchange between an electronic device connected to the display and an external device.
- the invention is particularly suitable for determining the light intensity of ambient light in order to control backlighting of a liquid crystal display.
- the measurement of the light intensity and the exchange of data by means of the optoelectronic component can alternatively or simultaneously be carried out in a display according to the invention. If both functions are to be implemented, this can be done either with the same optoelectronic component or with different optoelectronic components, which are preferably all arranged behind the display.
- the intensity of the ambient light can be determined by measuring its entire spectrum (100 nm to 1 mm) or selectively parts of the spectrum of the ambient light. Alternatively, it is possible to deduce the light intensity from the control of the light source in order to determine the proportion of ambient light in the total measured light. With the calculated value of the luminous intensity of the light source, the value of the luminous intensity measured by the sensor, which results from the ambient light and the light source, can be corrected. Conventional control devices or microcontrollers are suitable for the necessary calculations.
- the optoelectronic component or the optoelectronic components By arranging the optoelectronic component or the optoelectronic components at a location that is behind the liquid crystal layers from a viewer of the display, exactly the light incidence from the surroundings on the liquid crystal layer can be measured.
- the optoelectronic component cannot be accidentally covered or shaded.
- care is taken when measuring the light intensity that the light that comes from the backlighting is not taken into account.
- This can be achieved, for example, by using a filter in front of the light source or in front of the optoelectronic component.
- a sensor can also be used that selectively only a part of the spectrum. measures, namely that which is not emitted by the backlight.
- LC displays in which the information is shown light and the background dark, at least one optoelectronic component which is sensitive to the spectral range above 780 nm is preferably used.
- the polarizing filters used in such displays usually absorb electromagnetic radiation in the visible spectral range and in the UV range, but not in the infrared range. If a sensor that detects visible light is used as the optoelectronic component in a negative mode display, the measurement of the light intensity therefore depends on how many
- infrared sensors are particularly suitable, since one.
- Backlighting with a cold cathode tube ' or with light-emitting diodes emits no or no appreciable infrared radiation. It is therefore not necessary to add a filter in front of the sensor or the light source for the backlighting.
- the light intensity measurement is carried out in the near infrared range (900 nm to 1100 nm), no errors due to thermal radiation can occur.
- this range can be used particularly well for information transmission, since conventional transmitters and receivers (sensors) operate in this wavelength range.
- the invention is particularly suitable for transmissive LC displays, that is to say for displays which can only be operated with backlighting, and for LC displays which reflect ambient light and are additionally equipped with backlighting (transflective displays).
- Such transflective displays such as those presented for example in the magazine Elektronik 22/2000 on page 32, regularly do not require backlighting in daylight. Basically, it does not matter whether it is DSTN, TN, STN, FSTN, HAN, DAP, OMI or other LC displays.
- FIG. 1 shows a section through a transflective LC display with a light guide and a reflector
- FIG. 2 shows a view of the light guide from FIG. 1, in which possible positions for an optoelectronic component are shown
- FIG. 3 shows a section through a transflective LC display with a light box as a reflector
- FIG. 4 shows a view of the light box from FIG. 3, in which possible positions of the component are shown
- FIG. 5 shows a spectrum measured by a negative mode LC display, in which no segments are turned on (darkly switched)
- FIG. 6 shows a spectrum measured by a negative mode LC display, when all segments of the display are turned on (brightly switched).
- Figure 1 illustrates a simple transflective LC display that reflects daylight or ambient light and is additionally provided with backlighting. It has a front and a rear polarizing filter 1, between which two parallel glass substrates 2 are arranged. A liquid crystal layer 10 is embedded between two glass substrates 2. The glass substrates 2 are connected to one another via an adhesive frame 3. The adhesive frame prevents the liquid crystal from escaping. A light guide 4 is arranged on the rear polarizing filter 1 of the display. The light guide 4 is therefore on a
- Back or on page 9 (back) of the display which faces away from the viewer.
- Light for backlighting the display is injected into the light guide 4 by a light source 5 and just like incident ambient light in
- Light guide 4 is provided with a reflector 11 on its side facing away from the glass substrate.
- the light source 5 is arranged parallel to the glass substrates 2 and emits light of only part of the visible spectrum. It is advantageously a light source that. monochrome light
- An optoelectronic component 6 is on one side of the
- Light guide 4 arranged, which is aligned perpendicular to the glass substrates 2.
- the component 6 is aligned in an axis which essentially coincides with the radiation axis of the light source 5.
- the component 6 is arranged in a plane parallel to the rear polarizing filter 1 and further away from the front polarizing filter than from the rear polarizing filter.
- a photo transistor which can be used as a transmitter and / or receiver, a photo diode or another light measuring means (CCD) can be considered as the optoelectronic component 6.
- the component 6 is a photodiode, which serves as a sensor.
- a filter 7 is arranged between the light source 5 and the light guide 4, which filters out the relevant spectrum. Therefore, only such spectral measured components that originate from the incident ambient light, especially sunlight. This is shown schematically by a light beam hitting the light guide.
- the control of the light source 5 can alternatively be calculated back to its radiation intensity in order to determine the proportion of the radiation of the ambient light in the total radiation measured.
- This task can be performed by the control device 8.
- the control device 8 is a microcontroller which deduces the radiation intensity of the light source 5 on the basis of its power consumption or on the basis of a control signal. The intensity calculated for the light source 5 is then subtracted from the measured total intensity.
- the sensor is arranged in the plane of the light source and is therefore not visible to a viewer of the display.
- a separate housing opening for the sensor and the laying of electrical cables to the front of the housing are no longer required.
- the optoelectronic component 6 is completely covered on the outside by a housing (not shown) and the LC display.
- a control device 8 which is a microcontroller, controls the power of the light source 5 on the basis of the radiation strength of the ambient light measured in the area of the light guide 4. In the case of strong sunlight striking the LC display, the reflected ambient light is for reading the Displays sufficient. With decreasing The intensity of the ambient light is compensated accordingly by the light source 5.
- the energy consumption is significantly reduced in daylight.
- the readability remains good in all possible lighting conditions.
- the intensity of the backlighting 5 must be increased in the case of strong ambient light striking the LC display. When the ambient light decreases, the . Backlight dimmed to reduce energy consumption and not to dazzle the viewer.
- FIG. 2 shows favorable positions for an optoelectronic component 6 or more components 6.
- the component 6 or sensor is arranged on a surface of the light guide 4.
- the sensor can be attached to the side of the light guide 4 and parallel to the radiation axis of the light source 5.
- a positioning of the component (s) 6 in the direct beam path of the ambient light is also shown.
- the light source 5 consists of a plurality of light-emitting diodes (LED).
- FIG. 3 illustrates an optoelectronic component 6 or sensor which is arranged centrally on a reflector 11.
- the optoelectronic component 6 receives data from an external electrical device 12 and sends data there.
- the electrical device can be a remote control, a mobile phone, a portable computer, a pocket computer or the like.
- the reflector 11 is a light box which serves to distribute the light coming from the light source 5 as evenly as possible over the surface of the display.
- the light source 5, which is a multitude of LEDs, and the sensor are oriented perpendicular to the glass substrates 2.
- the arrangement of the light source 5 consisting of a large number of light-emitting diodes and of the optoelectronic component 6 on the reflector 11 is shown particularly clearly in FIG.
- FIG. 5 illustrates a radiation spectrum which was measured with a sensor arranged behind the liquid crystal layer, that is to say a sensor which is covered by the liquid crystal layer with respect to the ambient light. The measurement was carried out with the light source switched off on a negative mode display, in which none of its segments was activated.
- the intensity of the radiation incident and measured through the liquid crystal layer is given in percent over the wavelength ⁇ in nm.
- the display effectively attenuates incident radiation only in the ultraviolet range and in the range of visible light, ie up to a wavelength of approximately 800 nm.
- FIG. 6 shows the same measurement as FIG. 5 for the state that all segments are controlled. You can see the mode of operation of the LCDs, allowing light in the visible range to pass through, except for the portion that is lost in the polarizing filters and through losses. From a wavelength of around 850 nm no significant difference between the two states in FIGS. 5 and 6 can be seen. From approximately 900 nm to approximately 1100 nm there is no appreciable attenuation of the incident radiation.
- a particularly suitable measuring range for the sensor extends in the range from 900 nm to 1100 nm due to the low attenuation caused by the display.
- a filter for filtering out the light from the light source can be dispensed with.
- no filter is therefore regularly required.
- Such infrared sensors are also suitable for receiving signals which are emitted by an electrical device in order to establish a data connection with a device electrically connected to the display.
- the control device then serves to convert the received signals into its baseband.
- a light or infrared transmitter can also be arranged behind the liquid crystal layer.
- a data transfer protocol to an external device can be set up with the transmitter and receiver.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01916892A EP1373972B1 (de) | 2000-11-21 | 2001-03-01 | Flüssigkristallanzeigevorrichtung mit optoelektronischem bauelement und verfahren zum steuern der hinterleuchtung einer solchen anzeigevorrichtung |
DE50106279T DE50106279D1 (de) | 2000-11-21 | 2001-03-01 | Flüssigkristallanzeigevorrichtung mit optoelektronischem bauelement und verfahren zum steuern der hinterleuchtung einer solchen anzeigevorrichtung |
US10/439,769 US8013949B2 (en) | 2000-11-21 | 2003-05-16 | Liquid crystal display device with optoelectronic component and method for controlling backlighting of such a display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10057696A DE10057696A1 (de) | 2000-11-21 | 2000-11-21 | LC-Display und Verfahren zum Steuern der Hinterleuchtung eines LC-Displays |
DE10057696.6 | 2000-11-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/439,769 Continuation US8013949B2 (en) | 2000-11-21 | 2003-05-16 | Liquid crystal display device with optoelectronic component and method for controlling backlighting of such a display device |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002042837A1 WO2002042837A1 (de) | 2002-05-30 |
WO2002042837A9 true WO2002042837A9 (de) | 2003-12-18 |
Family
ID=7664080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/000772 WO2002042837A1 (de) | 2000-11-21 | 2001-03-01 | Flüssigkristallanzeigevorrichtung mit optoelektronischem bauelement und verfahren zum steuern der hinterleuchtung einer solchen anzeigevorrichtung |
Country Status (4)
Country | Link |
---|---|
US (1) | US8013949B2 (de) |
EP (1) | EP1373972B1 (de) |
DE (2) | DE10057696A1 (de) |
WO (1) | WO2002042837A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6753661B2 (en) * | 2002-06-17 | 2004-06-22 | Koninklijke Philips Electronics N.V. | LED-based white-light backlighting for electronic displays |
KR100810514B1 (ko) * | 2003-10-28 | 2008-03-07 | 삼성전자주식회사 | 디스플레이장치 및 그 제어방법 |
EP1710780A1 (de) * | 2005-04-07 | 2006-10-11 | Tatung Co., Ltd. | Verfahren zur Helligkeitsregelung einer Anzeigevorrichtung |
JP4743846B2 (ja) * | 2005-05-10 | 2011-08-10 | シチズン電子株式会社 | 光通信装置及びそれを用いた情報機器 |
JP4033217B2 (ja) * | 2006-02-14 | 2008-01-16 | エプソンイメージングデバイス株式会社 | 電気光学装置および電子機器 |
US8289248B2 (en) * | 2007-04-05 | 2012-10-16 | Sony Mobile Communications Ab | Light sensor within display |
TWI377392B (en) * | 2008-01-08 | 2012-11-21 | Au Optronics Corp | A backlight module, a liquid crystal display panel and a liquid crystal display apparatus comprising a photo-sensing device |
TWM364241U (en) * | 2008-11-28 | 2009-09-01 | Tron Intelligence Inc | Optical sensing type input device |
US20110063341A1 (en) * | 2009-09-15 | 2011-03-17 | Wendell Knicely | Method and system for correction, measurement and display of images |
US8072442B2 (en) * | 2010-02-09 | 2011-12-06 | Sharp Kabushiki Kaisha | Electrically switchable field of view for embedded light sensor |
US8952980B2 (en) | 2010-08-09 | 2015-02-10 | Gsi Group, Inc. | Electronic color and luminance modification |
US20120127140A1 (en) * | 2010-11-19 | 2012-05-24 | John Ryan | Multi-mode liquid crystal display with auxiliary non-display components |
EP2703967B1 (de) * | 2012-09-03 | 2019-10-30 | Siemens Aktiengesellschaft | Bedieneinrichtung für ein technisches System |
DE102014214767B4 (de) * | 2014-07-28 | 2019-03-21 | Continental Automotive Gmbh | Anzeigeeinrichtung für ein Kraftfahrzeug, insbesondere Head-up-Display und Verfahren zur Steuerung einer Anzeigeeinrichtung |
CN110770502A (zh) * | 2017-06-29 | 2020-02-07 | 昕诺飞控股有限公司 | 侧照亮面板中的集成ir接收器 |
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JPS6045219A (ja) * | 1983-08-23 | 1985-03-11 | Toshiba Corp | アクテイブマトリクス型表示装置 |
US4655552A (en) * | 1984-03-17 | 1987-04-07 | Citizen Watch Co., Ltd. | Flat panel display device having on-screen data input function |
JPS62125329A (ja) * | 1985-11-27 | 1987-06-06 | Hosiden Electronics Co Ltd | 透過形表示装置 |
US5153420A (en) * | 1990-11-28 | 1992-10-06 | Xerox Corporation | Timing independent pixel-scale light sensing apparatus |
US5610629A (en) * | 1991-12-06 | 1997-03-11 | Ncr Corporation | Pen input to liquid crystal display |
DE4140647C2 (de) * | 1991-12-10 | 1996-09-12 | Bosch Gmbh Robert | Anzeigevorrichtung mit Lichtsensor |
GB9220104D0 (en) * | 1992-09-07 | 1992-11-04 | Philips Electronics Uk Ltd | Matrix display device with light sensing function |
JPH07248494A (ja) * | 1994-03-14 | 1995-09-26 | Hitachi Ltd | 液晶表示装置 |
US5818553A (en) * | 1995-04-10 | 1998-10-06 | Norand Corporation | Contrast control for a backlit LCD |
JP2771499B2 (ja) * | 1995-12-19 | 1998-07-02 | 静岡日本電気株式会社 | 表示付き個別選択呼出受信機 |
JP4050802B2 (ja) * | 1996-08-02 | 2008-02-20 | シチズン電子株式会社 | カラー表示装置 |
US5684294A (en) * | 1996-10-17 | 1997-11-04 | Northern Telecom Ltd | Proximity and ambient light monitor |
US6188380B1 (en) * | 1997-02-03 | 2001-02-13 | Nanao Corporation | Photodetector of liquid crystal display and luminance control device using the same |
US6034752A (en) * | 1997-03-22 | 2000-03-07 | Kent Displays Incorporated | Display device reflecting visible and infrared radiation |
JP2000081608A (ja) * | 1998-06-29 | 2000-03-21 | Sanyo Electric Co Ltd | 集光機構付液晶表示装置 |
US6255784B1 (en) * | 1999-12-02 | 2001-07-03 | Visteon Global Technologies, Inc. | Photopic brightness controller for fluorescent backlights |
US7023503B2 (en) * | 2002-02-20 | 2006-04-04 | Planar Systems, Inc. | Image sensor with photosensitive thin film transistors |
-
2000
- 2000-11-21 DE DE10057696A patent/DE10057696A1/de not_active Withdrawn
-
2001
- 2001-03-01 DE DE50106279T patent/DE50106279D1/de not_active Expired - Lifetime
- 2001-03-01 EP EP01916892A patent/EP1373972B1/de not_active Expired - Lifetime
- 2001-03-01 WO PCT/DE2001/000772 patent/WO2002042837A1/de active IP Right Grant
-
2003
- 2003-05-16 US US10/439,769 patent/US8013949B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2002042837A1 (de) | 2002-05-30 |
EP1373972B1 (de) | 2005-05-18 |
US8013949B2 (en) | 2011-09-06 |
DE10057696A1 (de) | 2002-05-16 |
DE50106279D1 (de) | 2005-06-23 |
US20030197817A1 (en) | 2003-10-23 |
EP1373972A1 (de) | 2004-01-02 |
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