CN101295478A - Dither method and correlative dither module and LCD - Google Patents
Dither method and correlative dither module and LCD Download PDFInfo
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- CN101295478A CN101295478A CNA2007101021537A CN200710102153A CN101295478A CN 101295478 A CN101295478 A CN 101295478A CN A2007101021537 A CNA2007101021537 A CN A2007101021537A CN 200710102153 A CN200710102153 A CN 200710102153A CN 101295478 A CN101295478 A CN 101295478A
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Abstract
The invention relates to a color-delivering method, including the following steps: a plurality of big dithering screens are adopted for dithering to the last bit of a first group of M-bit video data; a plurality of small dithering screens are adopted for dithering to the last bit of a second group of M-bit video data; At least one content of a plurality of big dithering screens and / or at least one content of a plurality of small dithering screens are regulated frame by frame; wherein, each case of a plurality of big dithering screens comprises a plurality of sub dithering screens and each case of a plurality of sub dithering screens comprises a plurality of dithering threshold values, and each case of a plurality of small dithering screens comprises a plurality of dithering threshold values.
Description
Technical field
(Liquid Crystal Display LCD), particularly relates to a kind of dither method that is applied in the LCD, and relevant look module and the LCD of passing to the present invention relates to LCD.
Background technology
LCD (LCD) is one of main flow of present monitor market.In LCD, signal controller (Signal controller) and drive integrated circult (Driving IC) are two very important assemblies, wherein, the signal controller receives, and red/green/blue (R/G/B) video signal and data enable signal DE also produce corresponding controlling signal according to this, and the controlling signal that drive IC is then produced according to the signal controller drives Display Panel (Panel).
Generally speaking, the figure place of the received R/G/B signal of signal controller is same as the treatable figure place of drive IC.With present common video signal specification is example, and the figure place of the R/G/B signal that the signal controller is received is 8, so the employed drive IC of general LCD also possesses the processing power of 8 signals.Yet, on unit price, more expensive in order to the drive IC of handling 6 signals in order to the drive IC of handling 8 signals.So in order to reduce cost, part educational circles/people in the industry has proposed look (Dither) technology of passing for the LCD use successively, to allow the LCD of drive IC of built-in 6 signal processing poweies can carry out the demonstration of picture according to 8 R/G/B signal.Yet existing LCD passs the look technology all has its shortcoming to exist, for instance, some LCD passs the look technology can cause character used in proper names and in rendering some foreign names agate decline (Gammadegeneracy), that is originally each 253 gray scale can be failed in the R/G/B color field of each 256 gray scale, thus, originally was total to 256*256*256=16,777, the input data of 216 color ranges, LCD but can only show 253*253*253=16,194,277 color ranges have been lacked about 580,000 color ranges altogether.This is that existing LCD passs one of problem that the look technology faced.
Summary of the invention
One of purpose of the present invention is to provide a kind of dither method that is applied in the LCD, and relevant look module and the LCD of passing.
Embodiments of the invention disclose a kind of look one M position video signal data of passing to produce the method for a N position video signal data, it includes: use a plurality of big color-succession shieldings to come that one first group of last position in this M position video signal data is passed look and handle, wherein each in these a plurality of big color-succession shieldings all includes a plurality of sub-color-succession shieldings, and in these a plurality of sub-color-succession shieldings each all includes a plurality of chromatic threshold values (ditheringthresholds) of passing; Use a plurality of little color-succession shieldings to come that one second group of last position in this M position video signal data is passed look and handle, wherein each in these a plurality of little color-succession shieldings all includes a plurality of chromatic threshold values of passing; And adjust frame by frame in these a plurality of big color-succession shieldings at least one content and/or this a plurality of little color-succession shieldings at least one content.
Embodiments of the invention also disclose a kind of look module of passing, be used for passing look one M position video signal data to produce a N position video signal data, this is passed the look module and includes: one first passs color element, it uses a plurality of big color-succession shieldings to come that one first group of last position in this M position video signal data is passed look and handles, wherein each in these a plurality of big color-succession shieldings all includes a plurality of sub-color-succession shieldings, and in these a plurality of sub-color-succession shieldings each all includes a plurality of chromatic threshold values of passing; One second passs color element, and it uses a plurality of little color-succession shieldings to come that one second group of last position in this M position video signal data is passed look and handles, and wherein each in these a plurality of little color-succession shieldings all includes a plurality of chromatic threshold values of passing; And a control module, be coupled to this first and second pass color element, this control module is adjusted in these a plurality of big color-succession shieldings the content of at least one frame by frame, and/or adjusts in these a plurality of little color-succession shieldings the content of at least one frame by frame.
Embodiments of the invention also disclose a kind of LCD, and it includes a Display Panel, a data processor and a data driver.This data processor includes: a mapping block is used for a L position video signal data is mapped to a M position video signal data; And one pass the look module, is coupled to this mapping block, is used for passing this M position video signal data of look to produce a N position video signal data.This data driver is coupled to this Display Panel and this data processor, is used for driving this Display Panel according to this N position video signal data.
Description of drawings
Fig. 1 is an embodiment synoptic diagram of LCD of the present invention.
Fig. 2 is an embodiment synoptic diagram of the data processor among Fig. 1.
Fig. 3 passs the synoptic diagram of employed big color-succession shielding of color element and little color-succession shielding for first, second of Fig. 2.
Fig. 4 is an example of the performed running of the control module of displayed map 2.
The reference numeral explanation
100 LCD
110 signal controllers
120 data processors
122 mapping blocks
124 pass the look module
125 first pass color element
126 second pass color element
127 control modules
128 controlling signal generators
130 data drivers
150 gate drivers
170 Display Panels
310,310 ' big color-succession shielding
311,312,313,314 sub-color-succession shieldings
331,332,333,334,331 ', little color-succession shielding 332 ', 333 ', 334 '
Embodiment
Figure 1 shows that an embodiment synoptic diagram of LCD of the present invention (LCD).LCD 100 in the present embodiment includes a signal controller (Signal controller) 110, one data driver (Data driver) 130, one gate drivers (Gate driver) 150 and one Display Panel (Panel) 170.Signal controller 110 in the present embodiment receives a L position video signal data and a data enable signal DE, and the running of control data driver 130 and gate drivers 150 according to this, for this reason, signal controller 110 includes a data processor 120 and a controlling signal generator 128. Data driver 130 and 150 controls according to signal controller 110 of gate drivers drive Display Panel 170 display picture datas.And because the data driver 130 in the present embodiment possesses the ability of handling the N bit data, so data processor 120 must produce a N position video signal data according to this L position video signal data, and the running of using this N position video signal data to come control data driver 130.
Figure 2 shows that an embodiment synoptic diagram of the data processor 120 among Fig. 1.In present embodiment, data processor 120 includes mapping (Mapping) module 122 and and passs look (Dithering) module 124.Mapping (Mapping) module 122 is used for this L position video signal data is become a M position video signal data, passs 124 of look modules and is used for passing this M position video signal data of look to produce this N position video signal data.For instance, M=L+2, N=M-4 then are used as example with L=8, M=10, N=6 in following paragraph.
Can include the mapping table (Mappingtable) that 8 bit data is mapped to 10 bit data in the mapping block 122, in order to foundation as its running.And facing the problem of character used in proper names and in rendering some foreign names agate decline for fear of the LCD 100 of present embodiment, mapping block 122 can limit preceding 6 of each 10 pixel data in these 10 video signal datas can not be all 1.In other words, mapping block 122 can limit in these 10 video signal datas each 10 pixel data all must be more than or equal to ' 0000000000 ' and smaller or equal to ' 1111110000 ' (representing) in 2 system modes.
In the present embodiment, passing look module 124 includes one first and passs color element 125, one second and pass a color element 126 and a control module 127.First passs color element 125 uses a plurality of big color-succession shieldings to come that (Lease Significant Bit LSB) passs look and handles to one first group of last position in these 10 video signal datas.For instance, this first group of last position can include one first last position (first LSB) and one second last position (second LSB) in these 10 video signal datas, these a plurality of big color-succession shieldings respectively include four sub-color-succession shieldings, and these four sub-color-succession shieldings respectively include four and pass the chromatic threshold value.Second passs color element 126 uses a plurality of little color-succession shieldings to come that one second group of last position in these 10 video signal datas is passed look to handle.For instance, this second group of last position can include one the 3rd last position (third LSB) and one the 4th last position (third LSB) in these 10 video signal datas, and these a plurality of little color-succession shieldings then respectively include four and pass the chromatic threshold value.
Figure 3 shows that the synoptic diagram of aforesaid big color-succession shielding and little color-succession shielding.Wherein, numbering 310 is a big color-succession shielding, and numbering 311,312,313, to reach 314 be four sub-color-succession shieldings in the big color-succession shielding 310, and each sub-color-succession shielding all includes four and passs the chromatic threshold value.More particularly, A00, A01, A10, and A11 be that four in the sub-color-succession shielding 311 passed the chromatic threshold value, this four binary value of passing the chromatic threshold value can be set by control module 127 so that this four pass in the chromatic threshold value one and equal ' 00 ', one equal ' 01 ', one equal ' 10 ', one equal ' 11 '; ...; By that analogy, D00, D01, D10, and D11 be that four in the sub-color-succession shielding 314 passed the chromatic threshold value, this four binary value of passing the chromatic threshold value can be set by control module 127 so that this four pass in the chromatic threshold value one and equal ' 00 ', one equal ' 01 ', one equal ' 10 ', one equal ' 11 '.When the resolution of these 10 video signal datas was 1024 pixel *, 768 pixels, first passs color element 125 needed to use 256*192 big color-succession shielding to come first last position and second last position of these 10 video signal datas are passed the look processing.For instance, the value of supposing A11 is ' 10 ', then for the pixel Pin of position corresponding A 11 in these 10 video signal datas, first passs color element 125 can be with ' 10 ' add Pin to produce the pixel Pin ' of output.Certainly, first passs color element 125 also can compare ' 01 ' with the two ' xy ' of inverse of pixel Pin, if ' xy ' greater than ' 01 ', first passs color element 125 is about to ' 100 ' add Pin with the pixel Pin ' that produces output (that is in the 3rd LSB of Pin locate carry to produce Pin '); If ' xy ' is less than or equal to ' 01 ', first passs 125 pixel Pin ' (that is not-carry) that directly are used as exporting with Pin of color element.
In addition, in Fig. 3, numbering 331,332,333,334 is four little color-succession shieldings.A00, a01, a10, and a11 be that four in the little color-succession shielding 331 passed the chromatic threshold value, this four binary value of passing the chromatic threshold value can be set by control module 127 so that this four pass in the chromatic threshold value one and equal ' 00 ', one equal ' 01 ', one equal ' 10 ', one equal ' 11 '; ...; By that analogy, d00, d01, d10, and d11 be that four in the little color-succession shielding 334 passed the chromatic threshold value, this four binary value of passing the chromatic threshold value can be set by control module 127 so that this four pass in the chromatic threshold value one and equal ' 00 ', one equal ' 01 ', one equal ' 10 ', one equal ' 11 '.When the resolution of these 10 video signal datas was 1024*768, second passs color element 126 needed to use 512*384 little color-succession shielding to come the 3rd last position and the 4th last position of these 10 video signal datas are passed the look processing.For instance, the value of supposing a11 is ' 01 ', then for the first pixel Pin ' that passs the corresponding a11 of 125 outgoing positions of color element, second passs color element 126 can ' 0100 ' add that Pin ' is to produce the pixel Pout that exports.Certainly, second passs color element 126 also can compare ' 10 ' with the four ' pq ' third from the bottom of pixel Pin ', if ' pq ' greater than ' 10 ', second passs color element 126 can ' 10000 ' add Pin ' with the pixel Pout that produces output (that is in the 5th LSB of Pin ' locate carry with generation Pout); If ' pq ' is less than or equal to ' 10 ', second passs 126 pixel Pout (that is not-carry) that directly are used as exporting with Pin ' of color element.At last, second pass color element 126 output and pass the first six anteposition of each pixel data behind the look (Most Significant Bit is MSB) with as these 6 video signal datas.
An example of the running that Fig. 4 indicative control unit 127 is performed.For the chromatic effect of passing on the time field (time domain) is provided, control module 127 is adjusted in these a plurality of big color-succession shieldings the content of at least one frame by frame.With big color-succession shielding shown in Figure 3 310 is example, every a frame, control module 127 can with four sub-color-succession shieldings 311,312,313 in the big color- succession shielding 310, and 314 position clockwise (or inverse clock) revolve and turn 90 degrees (or 180,270 degree), and do not change four sub-color-succession shieldings 311,312,313, and 314 content, be shown in Fig. 4 left side with four sub-color-succession shieldings 311,312,313, and 314 position clockwise revolve the example that turn 90 degrees.
Similarly, for the chromatic effect of passing on the time field is provided, control module 127 is adjusted in these a plurality of little color-succession shieldings the content of at least one frame by frame.With little color-succession shielding shown in Figure 3 331,332,333, and 334 be example, every a frame, control module 127 can with four little color-succession shieldings 331,332,333, and 334 in the chromatic threshold value clockwise (or inverse clock) of passing revolve and turn 90 degrees (or 180,270 degree), and do not change four little color-succession shieldings 331,332,333, and 334 position, be shown in Fig. 4 right side the chromatic threshold value clockwise of passing in little color- succession shielding 331 and 333 is revolved and turn 90 degrees and the chromatic threshold value inverse clock of passing in little color-succession shielding 332 and 334 is revolved the example that turn 90 degrees.
And control module 127 can be passed the program-controlled unit (Programmingunit) in the look module 124 at last, it can be according to the running demand of LCD 100 setting of user or manufacturer (or according to), and adaptive ground (adaptively) sets first and pass color element 125 and/or second and pass the color element 126 employed chromatic threshold values of respectively passing.In addition, control module 127 also can be according to the running demand of LCD 100 setting of user or manufacturer (or according to), and the sense of rotation of the sub-color-succession shielding in each big color-succession shielding of adaptive ground decision and/or adaptive ground determine the sense of rotation of passing the chromatic threshold value in each little color-succession shielding.One of reference frame when for instance, LCD 100 practiced Polarity Control (Polarity control) mode promptly can be used as control module 127 runnings.
Though the data driver 130 among the LCD 100 of present embodiment only possesses the ability of handling 6 bit data, but by the performed running of data processor 120, LCD 100 can present the effect of 8 video signal datas, in addition, the practiced look technology of passing of present embodiment can't cause character used in proper names and in rendering some foreign names agate decline (Gammadegeneracy), so LCD 100 can correctly demonstrate all color ranges that comprised in these 8 video signal datas.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (27)
1. pass look one M position video signal data to produce the method for a N position video signal data for one kind, it includes:
Using a plurality of big color-succession shieldings to come that one first group of last position in this M position video signal data is passed look handles, wherein each in these a plurality of big color-succession shieldings all includes a plurality of sub-color-succession shieldings, and in these a plurality of sub-color-succession shieldings each all includes a plurality of chromatic threshold values of passing;
Use a plurality of little color-succession shieldings to come that one second group of last position in this M position video signal data is passed look and handle, wherein each in these a plurality of little color-succession shieldings all includes a plurality of chromatic threshold values of passing; And
Adjust frame by frame in these a plurality of big color-succession shieldings at least one content and/or this a plurality of little color-succession shieldings at least one content.
2. the method for claim 1, wherein adjust frame by frame in these a plurality of big color-succession shieldings at least one content and/or this a plurality of little color-succession shieldings at least one the step of content include:
Rotate at least one in these a plurality of big color-succession shieldings frame by frame; And/or
Rotate at least one in these a plurality of little color-succession shieldings frame by frame.
3. method as claimed in claim 2, it also includes:
The sense of rotation of at least one in these a plurality of big color-succession shieldings of adaptive ground decision rotation and/or rotate at least one sense of rotation in these a plurality of little color-succession shieldings.
4. method as claimed in claim 2, it also includes:
When playing this N position video signal data employed Polarity Control mode decide in these a plurality of big color-succession shieldings of rotation at least one sense of rotation and/or rotate at least one sense of rotation in these a plurality of little color-succession shieldings.
5. the method for claim 1, it also includes:
Adaptive ground is set passing in these a plurality of big color-succession shieldings and is passed the chromatic threshold value in chromatic threshold value and/or this a plurality of little color-succession shieldings.
6. the method for claim 1, wherein this first group of last position includes one first last position and one second last position in this M position video signal data, and this second group of last position includes one the 3rd last position and one the 4th last position in this M position video signal data.
7. the method for claim 1, wherein each in these a plurality of big color-succession shieldings all includes four sub-color-succession shieldings, in this four sub-color-succession shielding each all includes four and passs the chromatic threshold value, and in these a plurality of little color-succession shieldings each all includes four and passs the chromatic threshold value.
8. the method for claim 1, it also includes:
One L position video signal data is mapped to this M position video signal data.
9. method as claimed in claim 8, wherein L equals 8, M equals 10, and N equals 6.
10. pass the look module for one kind, be used for passing look one M position video signal data to produce a N position video signal data, this is passed the look module and includes:
One first passs color element, it uses a plurality of big color-succession shieldings to come that one first group of last position in this M position video signal data is passed look and handles, wherein each in these a plurality of big color-succession shieldings all includes a plurality of sub-color-succession shieldings, and in these a plurality of sub-color-succession shieldings each all includes a plurality of chromatic threshold values of passing;
One second passs color element, and it uses a plurality of little color-succession shieldings to come that one second group of last position in this M position video signal data is passed look and handles, and wherein each in these a plurality of little color-succession shieldings all includes a plurality of chromatic threshold values of passing; And
One control module, be coupled to this first and second pass color element, this control module is adjusted in these a plurality of big color-succession shieldings the content of at least one frame by frame, and/or adjusts in these a plurality of little color-succession shieldings the content of at least one frame by frame.
11. the look module of passing as claimed in claim 10, wherein this control module rotates at least one in these a plurality of big color-succession shieldings frame by frame, and/or rotates in these a plurality of little color-succession shieldings at least one frame by frame.
12. the look module of passing as claimed in claim 11, the wherein sense of rotation of at least one in these a plurality of big color-succession shieldings of this control module adaptive ground decision rotation and/or rotate at least one sense of rotation in these a plurality of little color-succession shieldings.
13. the look module of passing as claimed in claim 11, wherein this control module employed Polarity Control mode when playing this N position video signal data decide in these a plurality of big color-succession shieldings of rotation at least one sense of rotation and/or rotate at least one sense of rotation in these a plurality of little color-succession shieldings.
14. the look module of passing as claimed in claim 10, wherein this control module adaptive ground is set passing in these a plurality of big color-succession shieldings and is passed the chromatic threshold value in chromatic threshold value and/or this a plurality of little color-succession shieldings.
15. the look module of passing as claimed in claim 10, wherein this first group of last position includes one first last position and one second last position in this M position video signal data, and this second group of last position includes one the 3rd last position and one the 4th last position in this M position video signal data.
16. the look module of passing as claimed in claim 10, wherein each in these a plurality of big color-succession shieldings all includes four sub-color-succession shieldings, in this four sub-color-succession shielding each all includes four and passs the chromatic threshold value, and in these a plurality of little color-succession shieldings each all includes four and passs the chromatic threshold value.
17. the look module of passing as claimed in claim 10, wherein M equals 10, and N equals 6.
18. a LCD, it includes:
One Display Panel;
One data processor, it includes:
One mapping block is used for a L position video signal data is mapped to a M position video signal data; And
One passs the look module, is coupled to this mapping block, is used for passing this M position video signal data of look to produce a N position video signal data; And
One data driver is coupled to this Display Panel and this data processor, is used for driving this Display Panel according to this N position video signal data.
19. LCD as claimed in claim 18, wherein L equals 8, M equals 10, and N equals 6.
20. LCD as claimed in claim 18, wherein this is passed the look module and includes:
One first passs color element, it uses a plurality of big color-succession shieldings to come that one first group of last position in this M position video signal data is passed look and handles, wherein each in these a plurality of big color-succession shieldings all includes a plurality of sub-color-succession shieldings, and in these a plurality of sub-color-succession shieldings each all includes a plurality of chromatic threshold values of passing; And
One second passs color element, and it uses a plurality of little color-succession shieldings to come that one second group of last position in this M position video signal data is passed look and handles, and wherein each in these a plurality of little color-succession shieldings all includes a plurality of chromatic threshold values of passing.
21. LCD as claimed in claim 20, wherein this is passed the look module and also includes:
One control module, be coupled to this first and second pass color element, this control module is adjusted in these a plurality of big color-succession shieldings the content of at least one frame by frame, and/or adjusts in these a plurality of little color-succession shieldings the content of at least one frame by frame.
22. LCD as claimed in claim 21, wherein this control module rotates at least one in these a plurality of big color-succession shieldings frame by frame, and/or rotates in these a plurality of little color-succession shieldings at least one frame by frame.
23. LCD as claimed in claim 22, the wherein sense of rotation of at least one in these a plurality of big color-succession shieldings of this control module adaptive ground decision rotation and/or rotate at least one sense of rotation in these a plurality of little color-succession shieldings.
24. LCD as claimed in claim 22, wherein this control module employed Polarity Control mode when playing this N position video signal data decide in these a plurality of big color-succession shieldings of rotation at least one sense of rotation and/or rotate at least one sense of rotation in these a plurality of little color-succession shieldings.
25. LCD as claimed in claim 21, wherein this control module adaptive ground is set passing in these a plurality of big color-succession shieldings and is passed the chromatic threshold value in chromatic threshold value and/or this a plurality of little color-succession shieldings.
26. LCD as claimed in claim 20, wherein this first group of last position includes one first last position and one second last position in this M position video signal data, and this second group of last position includes one the 3rd last position and one the 4th last position in this M position video signal data.
27. LCD as claimed in claim 20, wherein each in these a plurality of big color-succession shieldings all includes four sub-color-succession shieldings, in this four sub-color-succession shielding each all includes four and passs the chromatic threshold value, and in these a plurality of little color-succession shieldings each all includes four and passs the chromatic threshold value.
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| CN200710102153.7A CN101295478B (en) | 2007-04-29 | 2007-04-29 | Dither method and correlative dither module and LCD |
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| CN200710102153.7A CN101295478B (en) | 2007-04-29 | 2007-04-29 | Dither method and correlative dither module and LCD |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2624337Y (en) * | 2003-06-10 | 2004-07-07 | 海信集团有限公司 | Error diffusion jitter processing circuit for color digital signal of lattice driven display |
| CN1629922A (en) * | 2003-12-15 | 2005-06-22 | Lg电子有限公司 | Apparatus and method for driving plasma display panel |
| US20050219176A1 (en) * | 2004-03-31 | 2005-10-06 | Song Byung C | Dithering method and apparatus for liquid crystal display panel |
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2007
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2624337Y (en) * | 2003-06-10 | 2004-07-07 | 海信集团有限公司 | Error diffusion jitter processing circuit for color digital signal of lattice driven display |
| CN1629922A (en) * | 2003-12-15 | 2005-06-22 | Lg电子有限公司 | Apparatus and method for driving plasma display panel |
| US20050219176A1 (en) * | 2004-03-31 | 2005-10-06 | Song Byung C | Dithering method and apparatus for liquid crystal display panel |
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