CN100492489C - Anti-flash display method and device - Google Patents
Anti-flash display method and device Download PDFInfo
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- CN100492489C CN100492489C CNB2006100614475A CN200610061447A CN100492489C CN 100492489 C CN100492489 C CN 100492489C CN B2006100614475 A CNB2006100614475 A CN B2006100614475A CN 200610061447 A CN200610061447 A CN 200610061447A CN 100492489 C CN100492489 C CN 100492489C
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Abstract
A displaying method of flash resisting includes receiving the coding of object to be displayed, loading relevant single color bit map and scanning said bit map, obtaining coordinate value of point to be display and obtaining original brightness of M numbers of point adjacent to point to be displayed by utilizing preset calculation formula if there is point to be displayed, calculating actual color value according to actual brightness of point to be displayed and adjacent M number of points. The display device used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to display technique, especially a kind of anti-flicker display technique.
Background technology
Dot matrix word library is a kind of display format of depositing the literal shape information with binary digit string.Fig. 1 shows the demonstration of character " you " in the dot matrix word library.The implication of these two systems strings is: if be 1, represent that this point need be with foreground (character color just) expression on display device; Be that 0 this point does not need to show.These binary data constitute the most original bitmap of a width of cloth monochrome in essence, the dot array data of hereinafter mentioning, and just this binary data perhaps also is referred to as character pattern data or original bitmap.
In fact exactly convert monochromatic original bitmap to the process that color bitmap (target bitmap) arranged consistent based on the dot matrix word library character displaying method with the equipment display properties.Usually the method that adopts is: at first obtain the dot array data of character, then according to application program specific context bitmap and foreground, judge by turn from dot array data, if be 1, then the target bitmap respective pixel values is the color of character, is 0, then uses the target bitmap color.
This with original bitmap simple conversion and the mode that shows, do not have any problem at frame frequency (per second shows whole screen picture number of times) on than higher display terminal, such as, at the display terminal of PC, can see very level and smooth comfortable image.If but be shown on the televisor, then effect it is to be difficult to accept.This is lower mainly due to the conventional television frame frequency, and employing is interleaved technology.In one second, it after vertical scanning is intact, then carries out even number line scanning at first with the image odd-numbered line of vertical scanning image from top to bottom.This processing mode directly feels it is that image exists the flicker of tangible bob to the people.Industry is referred to as interline flicker usually.If brightness differs big more between image line, flickering is also just strong more.
For solving the interline flicker problem, a kind of anti-flickering method of prior art comprises the steps: at first pending static images to be carried out the extraction of color matrix; Then, the color matrix that extracts is converted into the matrix of representing with brightness, carrier chrominance signal, and matrix is separated into luminance matrix and chrominance matrix; The picture luminance matrix is handled by wave filter, filtered out the brightness high fdrequency component that can produce scintillation; Luminance matrix and the chrominance matrix handled are merged, be converted into color matrix again; Be reduced to picture format.
This technical scheme need be calculated color matrix and the conversion and the inverse transformation of the matrix represented with brightness, carrier chrominance signal, in this process, use floating-point operation (fractional arithmetic) mode to carry out conversion, if realize floating-point operation with software, then efficient will be extremely low, thereby make this scheme not possess availability.If hardware CPU supports floating-point operation, if but relate to a large amount of floating-point operations, efficient also is very low.In a word, use this programme, need higher hardware cost, but operational efficiency is very low.
Summary of the invention
The invention provides a kind of anti-flash display method and device, use lower hardware cost to reduce interline flicker.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of anti-flash display method may further comprise the steps:
A, reception need the object coding of demonstration, load corresponding monochrome bitmap, and described monochrome bitmap is scanned;
B, in scanning process, point if any the need demonstration, obtain the coordinate figure of the point that need to show on the target bitmap of object coding correspondence, and then need to obtain the point that shows and the original brightness value of adjacent M point, calculating according to following formula needs point and adjacent M intrinsic brilliance value Y that puts of showing:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
C, calculate the actual color value of each point, show at coordinate figure accordingly according to intrinsic brilliance value, actual color value according to the intrinsic brilliance value of described point that need to show and adjacent M point.
Wherein, described M is 2, and adjacent 2 points are respectively the 2 capable vertically points of point that are positioned at the need demonstration.
A ' 〉=A wherein
N
Wherein, A
1=A
2=A '=0.33.
Wherein, comprise before the described step C: judge whether described adjacent M point has the point that has shown,, stop operation the described point that has shown if any the point that has shown; For the point that does not have to show, execution in step C.
A kind of anti-flicker display device comprises:
The library stores device is used for the store monochrome bitmap;
Load-on module, the character code that receive to need shows, in described library stores device extraction and load the monochrome bitmap of this character;
Display module receives the monochrome bitmap that load-on module sends, and described monochrome bitmap is scanned, and the point if any need show on the target bitmap of object coding correspondence, needing to obtain the point coordinate value of demonstration;
Modular converter, the coordinate figure of the point that the need that send according to display module show obtains the described point that shows and the original brightness value of adjacent M point of needing, and calculates point and adjacent M the intrinsic brilliance value Y that puts that needs demonstration according to following formula:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
And send to described display module according to the actual color value that the described point that need to show and adjacent M intrinsic brilliance value of putting are calculated each point;
Display module receives intrinsic brilliance value and actual color value, shows at corresponding corresponding coordinate figure.
Wherein, described device also comprises:
Display buffer is used for being buffered in the primitive color value of display module display object.
Wherein, described modular converter specifically comprises:
The point acquiring unit, the coordinate figure of point on target bitmap according to need show obtains the coordinate figure of adjacent M point on target bitmap, and then obtains from described display buffer and to need point and adjacent M primitive color value transmission of putting of showing;
The brightness value computing unit, the point that shows according to need and the primitive color value of adjacent M point calculate the original brightness value of each point respectively, according to the intrinsic brilliance value Y of following formula calculating each point:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
Point and adjacent M the intrinsic brilliance value of putting that need are shown send to described display module;
The color value computing unit calculates the actual color value of each point according to described point and adjacent M intrinsic brilliance value of putting that needs to show, and sends to described display module.
Wherein, described some acquiring unit also comprises a determining device, and described determining device is according to the coordinate of adjacent M point on target bitmap, judges whether the point that shown, sends the coordinate figure of the point that not have demonstration to described brightness value computing unit;
Described brightness value computing unit sends the intrinsic brilliance value of the point that does not have demonstration to described display module and color value computing unit.
Wherein, described M is 2.And adjacent 2 points are respectively and are positioned at the 2 capable vertically points of point that need show.
Wherein, A
1=A
2=A '=0.33.
The adjacent M of the point sampling point that the present invention only shows need, only calculate the brightness value of this M point, reduce the brightness value gap of this M point by the brightness value of redistributing M point, and then the gap in the ranks of minimizing brightness value, significantly reduced calculated amount, improved efficient, also lowered requirement display system hardware.By judging before calculating the actual color value whether adjacent M point had shown, the point that has shown is no longer handled, and reduced calculated amount, prevented to repeat to show.
Description of drawings
Fig. 1 is the example of this area font dot matrix;
Fig. 2 is the process flow diagram of anti-flash display method of the present invention;
Fig. 3 is the structured flowchart of the anti-flicker of the present invention display device;
Fig. 4 is the cut-away view of modular converter in the anti-flicker of the present invention display device.
Embodiment
A kind of colour coding method that YUV (also claiming YCrCb) is adopted by the eurovision system.Wherein " Y " represents brightness (Lumina nce or Luma), just GTG value; That " U " and " V " represents then is colourity (Chrominance or Chroma), and effect is to describe colors of image and saturation degree, is used to specify color of pixel." brightness " is created by the RGB input signal, and method is that the specific part with rgb signal is superimposed together." colourity " has then defined two the aspect tones and the saturation degree of color, represents with Cr and Cb respectively.YUV is mainly used in the transmission of optimizing colour-video signal, compares with the rgb video signal transmission, and its biggest advantage is only need take few bandwidth.
Core of the present invention is to extract the brightness value that needs the point itself that shows, and the brightness value of these consecutive point, and according to the brightness value of each point, the factor by a certain percentage calculates the new brightness value of each point.According to new brightness value, recomputate the color value of each point, to reduce luminance difference distance in the ranks, reduce interline flicker.
Please refer to Fig. 2, the invention provides a kind of anti-flash display method, concrete steps comprise:
Step 1: receive the character code that needs demonstration, load according to character code and obtain the original monochrome bitmap of this character, promptly character pattern at first carries out vertical scanning to this monochrome bitmap, carries out horizontal scanning again;
Step 2: judge whether scanning process finishes,, finish whole flow process, as not finishing execution in step 3 as finishing;
Step 3: scan next point, judgement is whether this point needs to show, shows (hereinafter referred to as this point), execution in step 4, otherwise repeated execution of steps 3 if desired;
Step 4: the target bitmap coordinate figure (Xd that obtains this point, Yd), it is the position of this actual displayed on display terminal, according to (Xd, Yd), obtain in the target bitmap coordinate figure that this puts adjacent M point, from display buffer, obtain the primitive color value of each point, wherein 1≤M≤8 according to the coordinate of each point; This color value combines a value with red (R), green (G), blue (B) three-component usually;
Step 5: obtain three components of RGB respectively according to this point and adjacent M the primitive color value of putting, calculating three components of RGB according to color value is prior aries, does not describe in detail at this;
With following formula, calculate the original brightness value Y of each point respectively
N:
Original brightness value Y according to each point
NCalculate the intrinsic brilliance value Y that each shows on display module screen:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
After calculating the intrinsic brilliance value of each point, judging in adjacent M the point has the point that has not shown, if any, stop operation, for the point that does not also have to show, execution in step 6 to the described point that has shown;
Step 6:, calculate the actual color value of each point again according to the intrinsic brilliance value Y of each point; Calculate the actual color value of the each point that does not also have demonstration according to following formula:
According to intrinsic brilliance value that calculates and actual color value, show each point in the coordinate relevant position of display module screen; Repeated execution of steps 2.
Take into consideration from calculated amount and display effect, M=2 is more excellent embodiment, for being illustrated more clearly in the present invention, introduces the anti-flash display method of M=2 below:
Step 101: the monochrome bitmap of the character that needs are shown scans;
Step 102: judge whether scanning finishes, and finishes whole flow process, as not finishing execution in step 103;
Step 103: scan next point, judgement is whether this point needs to show, shows (hereinafter referred to as this point), execution in step 104, otherwise repeated execution of steps 103 if desired;
Step 104: the target bitmap coordinate (Xd that obtains this point, Yd), adjacent two points can be on the horizontal direction about 2 points, can also be upper left on the diagonal line, 2 of bottom rights or upper right, upper left 2 points, preferred implementation is 2 row points (hereinafter referred to as 2 points up and down) up and down on this vertical direction, can effectively reduce gap in the ranks like this; Up and down 2 coordinate be respectively (Xd, Yd-1) and (Xd Yd+1), according to this point, 2 coordinate figure up and down, obtains the primitive color value of each point from display buffer;
Step 105: according to this point and up and down 2 primitive color value obtain three components of RGB respectively, calculate the original brightness value Y of each point again
This, Y
On, Y
Down, according to the Y that obtains
This, Y
On, Y
DownValue is asked the brightness Y of each point in the target bitmap actual displayed:
Y=Y
On* A
1+ Y
Down* A
2+ Y
This* A ';
A wherein
1+ A
2+ A '=1, the numerical value of A ' is more than or equal to A
1And A
2Empirical data is A
1=A
2Better effects can be obtained by the intrinsic brilliance value of three points of homogenizing in=A '=0.33;
After calculating the intrinsic brilliance value Y of three points, judge whether show up and down at 2, only point that does not also show in the reservation up and down and the coordinate figure and the intrinsic brilliance value of this point;
Step 106: also do not have the point of demonstration and the intrinsic brilliance value of this point in up and down, calculate the color value of each point again, according to the intrinsic brilliance value and the color value that calculate, show each point at the corresponding coordinate figure of display place, execution in step 102 again.
See also Fig. 3, the invention provides a kind of anti-flicker display device, comprise load-on module, display module, modular converter, library stores device and display buffer, the function of each module is as follows:
The library stores device is used for the store character Dot Matrix Library, i.e. the store monochrome bitmap;
Display buffer is used to be buffered in display module and shows required data, comprises the color value of each display object.
Load-on module, the character code that receive to need shows loads the monochrome bitmap of described character in the described library stores device;
Display module, obtain the monochrome bitmap that load-on module sends, specify the foreground (being character color) of this character, the position of character actual displayed on display terminal in conjunction with the requirement that this character is shown, and the background picture of display position, this monochrome bitmap is scanned, judge the point (being called for short this point) that needing to obtain demonstration, send this coordinate figure on target bitmap;
Modular converter, according to this coordinate figure on target bitmap, obtain the coordinate figure of adjacent M point on target bitmap, and then from display buffer, obtain the native color value that this point and adjacent M put, and calculate this point and adjacent M intrinsic brilliance value and the actual color value of putting, send to display module;
Display module shows in corresponding position according to each intrinsic brilliance value and actual color value.
Please refer to Fig. 4, the inner structure of modular converter specifically comprises: the some acquiring unit, and the brightness value computing unit, the color value computing unit, the function of each unit is as follows:
The point acquiring unit according to the coordinate of point on target bitmap that need show, obtains the coordinate figure of adjacent M point on target bitmap, and obtains the native color value and the transmission of each point from display buffer,
Inside also comprises a determining device, is used for judging whether described adjacent M point has the point that has shown, will send to the brightness value computing unit less than the coordinate figure of the point that shows;
The brightness value computing unit, native color value according to each point obtains three components of RGB respectively, calculate the former brightness value of each point respectively according to three components of RGB of each point,, calculate the intrinsic brilliance value Y of each point according to following formula according to the former brightness value of each point:
Y=∑ Y
NA
N, wherein 1≤M≤8,1≤N≤M+1, and ∑ A
N=1, Y
NThe brightness value of representing each point, A
NThe scale factor of representing each point;
The coordinate figure of the point that not have of receiving that described judging unit sends shows sends the intrinsic brilliance value of the point that not have demonstration to color value computing unit and display module, can avoid the double counting to the color value of the point that shown like this, and can avoid repeating demonstration.
The color value computing unit, the intrinsic brilliance value of each point that the reception brightness value sends is calculated each actual color value that accounts for according to the intrinsic brilliance value and is sent to display module.
Though above embodiment only is illustrated the demonstration of character, but those skilled in the art can expect that obviously the foreground point is less, and all more pictures of background dot, include but not limited to sign, little picture, the demonstration of cursor bitmap also can be used the present invention.These are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, and the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1, a kind of anti-flash display method is characterized in that, may further comprise the steps:
A, reception need the object coding of demonstration, load corresponding monochrome bitmap, and described monochrome bitmap is scanned;
B, in scanning process, point if any the need demonstration, obtain the coordinate figure of the point that need to show on the target bitmap of object coding correspondence, and then need to obtain the point that shows and the original brightness value of adjacent M point, calculating according to following formula needs point and adjacent M intrinsic brilliance value Y that puts of showing:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
C, calculate the actual color value of each point, show at coordinate figure accordingly according to intrinsic brilliance value, actual color value according to the intrinsic brilliance value of described point that need to show and adjacent M point.
2, anti-flash display method as claimed in claim 1 is characterized in that, described M is 2, and adjacent 2 points are respectively the 2 capable vertically points of point that are positioned at the need demonstration.
3, anti-flash display method as claimed in claim 2 is characterized in that, A ' 〉=AN.
4, anti-flash display method as claimed in claim 3 is characterized in that, A
1=A
2=A '=0.33.
5, anti-flash display method as claimed in claim 1 is characterized in that, comprises before the described step C: judge whether described adjacent M point has the point that has shown, if any the point that has shown, stop the operation to the described point that has shown; For the point that does not have to show, execution in step C.
6, a kind of anti-flicker display device is characterized in that, comprising:
The library stores device is used for the store monochrome bitmap;
Load-on module, the character code that receive to need shows, in described library stores device extraction and load the monochrome bitmap of this character;
Display module receives the monochrome bitmap that load-on module sends, and described monochrome bitmap is scanned, and the point if any need show on the target bitmap of object coding correspondence, needing to obtain the point coordinate value of demonstration;
Modular converter, the coordinate figure of the point that the need that send according to display module show obtains the described point that shows and the original brightness value of adjacent M point of needing, and calculates point and adjacent M the intrinsic brilliance value Y that puts that needs demonstration according to following formula:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
And send to described display module according to the actual color value that the described point that need to show and adjacent M intrinsic brilliance value of putting are calculated each point;
Display module receives intrinsic brilliance value and actual color value, shows at corresponding coordinate figure.
7, anti-flicker display device as claimed in claim 6 is characterized in that described device also comprises:
Display buffer is used for being buffered in the primitive color value of display module display object.
8, anti-flicker display device as claimed in claim 7 is characterized in that described modular converter specifically comprises:
The point acquiring unit, the coordinate figure of point on target bitmap according to need show obtains the coordinate figure of adjacent M point on target bitmap, and then obtains from described display buffer and to need point and adjacent M primitive color value transmission of putting of showing;
The brightness value computing unit, the point that shows according to need and the primitive color value of adjacent M point calculate the original brightness value of each point respectively, according to the intrinsic brilliance value Y of following formula calculating each point:
Y=∑ Y
NA
N+ Y ' A ', wherein 1≤M≤8,1≤N≤M, and ∑ A
N+ A '=1, Y
NAnd Y ' represents adjacent M the original brightness value of putting and need the point that shows, A respectively
NAnd A ' represents adjacent M the scale factor of putting and need the point that shows respectively;
Point and adjacent M the intrinsic brilliance value of putting that need are shown send to described display module;
The color value computing unit calculates the actual color value of each point according to described point and adjacent M intrinsic brilliance value of putting that needs to show, and sends to described display module.
9, anti-flicker display device as claimed in claim 8, it is characterized in that, described some acquiring unit also comprises a determining device, described determining device is according to the coordinate of adjacent M point on target bitmap, judge whether the point that shown, send the coordinate figure of the point that not have demonstration to described brightness value computing unit;
Described brightness value computing unit sends the intrinsic brilliance value of the point that does not have demonstration to described display module and color value computing unit.
10, as claim 6 or 7 described anti-flicker display device, it is characterized in that described M is 2, and adjacent 2 points are respectively the 2 capable vertically points of point that are positioned at the need demonstration.
11, anti-flicker display device as claimed in claim 8 is characterized in that A
1=A
2=A '=0.33.
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| CNB2006100614475A CN100492489C (en) | 2006-06-29 | 2006-06-29 | Anti-flash display method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100614475A CN100492489C (en) | 2006-06-29 | 2006-06-29 | Anti-flash display method and device |
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| CN101000758A CN101000758A (en) | 2007-07-18 |
| CN100492489C true CN100492489C (en) | 2009-05-27 |
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| KR101829831B1 (en) | 2010-05-06 | 2018-02-19 | 엘지전자 주식회사 | Apparatus and method of transmitting control information in wireless communication system |
| CN105357430B (en) * | 2014-08-19 | 2019-11-15 | 深圳市中兴微电子技术有限公司 | A kind of anti-flashing processing method and processing device |
| CN106327552B (en) * | 2016-08-31 | 2019-09-06 | 广州博冠信息科技有限公司 | A kind of character displaying method and device |
| CN106157897B (en) | 2016-09-26 | 2018-11-20 | 京东方科技集团股份有限公司 | A kind of brightness control method, device, AMOLED panel and electronic equipment |
| CN112328133A (en) * | 2020-11-23 | 2021-02-05 | 深圳Tcl新技术有限公司 | Icon display method and device and storage medium |
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