CN101295478B - Dither method and correlative dither module and LCD - Google Patents
Dither method and correlative dither module and LCD Download PDFInfo
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- CN101295478B CN101295478B CN200710102153.7A CN200710102153A CN101295478B CN 101295478 B CN101295478 B CN 101295478B CN 200710102153 A CN200710102153 A CN 200710102153A CN 101295478 B CN101295478 B CN 101295478B
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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
The present invention relates to liquid crystal display (Liquid Crystal Display, LCD), particularly relate to a kind of dither method being applied in liquid crystal display, and relevant look module and the liquid crystal display of passing.
Background technology
Liquid crystal display (LCD) is one of main flow of current monitor market.In LCD, signal controller (Signal controller) and drive integrated circult (Driving IC) are two very important assemblies, wherein, signal controller receives, and red/green/blue (R/G/B) video signal and data enable signal DE also produce corresponding control signal according to this, and the control signal that drive IC produces according to 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.The common video standard at present of take is example, and the figure place of the R/G/B signal that signal controller is received is 8, therefore the drive IC that general LCD is used also possesses the processing power of 8 signals.Yet, on unit price, more expensive in order to process the drive IC of 6 signals in order to the drive IC of processing 8 signals.Therefore in order to reduce costs, part educational circles/people in the industry has proposed look (Dither) technology of passing for LCD successively, to allow the LCD of drive IC of built-in 6 signal processing poweies can carry out according to the R/G/B signal of 8 demonstration of picture.Yet existing LCD passs look technology all has its shortcoming to exist, for instance, some LCD passs look technology can cause character used in proper names and in rendering some foreign names agate decline (Gammadegeneracy), that is originally each 253 gray scales can be failed in the R/G/B color field of each 256 gray scales, thus, be originally 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 lacked approximately 580,000 color ranges altogether.This is that existing LCD passs one of problem that look technology faces.
Summary of the invention
One of object of the present invention, is to provide a kind of dither method being applied in liquid crystal display, and relevant look module and the liquid crystal display 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: with a plurality of large color-succession shieldings, one first group of last position in this M position video signal data is passed to look and process, wherein each in the plurality of large color-succession shielding all includes a plurality of sub-color-succession shieldings, and each in the plurality of sub-color-succession shielding all includes a plurality of chromatic threshold values (ditheringthresholds) of passing; With a plurality of little color-succession shieldings, one second group of last position in this M position video signal data is passed to look and process, wherein each in the plurality of little color-succession shielding all includes a plurality of chromatic threshold values of passing; And adjust frame by frame in the plurality of large color-succession shielding at least one content and/or the plurality of little color-succession shielding 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 look module and includes: one first passs color element, it is passed look with a plurality of large color-succession shieldings to one first group of last position in this M position video signal data and processes, wherein each in the plurality of large color-succession shielding all includes a plurality of sub-color-succession shieldings, and each in the plurality of sub-color-succession shielding all includes a plurality of chromatic threshold values of passing; One second passs color element, and it is passed look with a plurality of little color-succession shieldings to one second group of last position in this M position video signal data and processes, and wherein each in the plurality of little color-succession shielding 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 the plurality of large color-succession shielding the content of at least one frame by frame, and/or adjusts frame by frame in the plurality of little color-succession shielding the content of at least one.
Embodiments of the invention also disclose a kind of liquid crystal display, 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 to be mapped to a M position video signal data; And one pass look module, be coupled to this mapping block, be 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.
Accompanying drawing explanation
Fig. 1 is an embodiment schematic diagram of liquid crystal display of the present invention.
Fig. 2 is an embodiment schematic diagram of the data processor in Fig. 1.
Fig. 3 is that first, second of Fig. 2 passed large color-succession shielding that color element uses and the schematic diagram of little color-succession shielding.
Fig. 4 is an example of the performed running of the control module of demonstration Fig. 2.
Reference numeral explanation
100 liquid crystal display
110 signal controllers
120 data processors
122 mapping blocks
124 pass look module
125 first pass color element
126 second pass color element
127 control modules
128 control signal generator
130 data drivers
150 gate drivers
170 Display Panels
310,310 ' large 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 schematic diagram of liquid crystal display of the present invention (LCD).LCD100 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 control according to this running of data driver 130 and gate drivers 150, for this reason, signal controller 110 includes a data processor 120 and a control 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 processing N bit data, therefore data processor 120 must produce a N position video signal data according to this L position video signal data, and with this N position video signal data, control the running of data driver 130.
Figure 2 shows that an embodiment schematic diagram of the data processor 120 in Fig. 1.In the present embodiment, data processor 120 includes a mapping (Mapping) module 122 and and passs look (Dithering) module 124.Mapping (Mapping) module 122 is used for this L position video signal data to 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 are used as example with L=8, M=10, N=6 in following paragraph.
In mapping block 122, can include the mapping table (Mappingtable) that 8 bit data is mapped to 10 bit data, in order to the foundation as its running.And for fear of the LCD100 of the present embodiment, facing the problem of character used in proper names and in rendering some foreign names agate decline, mapping block 122 can limit first 6 of each 10 pixel datas in these 10 video signal datas can not be all 1.In other words, mapping block 122 can limit each 10 pixel datas in these 10 video signal datas and all must be more than or equal to ' 0000000000 ' and be less than 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 color element 126 and a control module 127.First passs a plurality of large color-succession shieldings of color element 125 use comes that one first group of last position (Lease Significant Bit, LSB) in these 10 video signal datas is passed to look and processes.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, the plurality of large color-succession shielding respectively includes four sub-color-succession shieldings, and these four sub-color-succession shieldings respectively include four and pass chromatic threshold value.Second passs a plurality of little color-succession shieldings of color element 126 use passs look to one second group of last position in these 10 video signal datas and processes.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 the plurality of little color-succession shielding respectively includes four and passs chromatic threshold value.
Figure 3 shows that the schematic diagram of aforesaid large color-succession shielding and little color-succession shielding.Wherein, numbering 310 is a large color-succession shielding, numbers 311,312,313 and 314 for four sub-color-succession shieldings in large color-succession shielding 310, and each sub-color-succession shielding all includes four and passs chromatic threshold value.More particularly, A00, A01, A10 and A11 are that four in sub-color-succession shielding 311 passed chromatic threshold value, this four binary value of passing chromatic threshold value can be set by control module 127 so that this four pass in chromatic threshold value one and equal ' 00 ', one equal ' 01 ', one equal ' 10 ', one equal ' 11 '; ...; By that analogy, D00, D01, D10 and D11 are that four in sub-color-succession shielding 314 passed chromatic threshold value, this four binary value of passing chromatic threshold value can be set by control module 127 so that this four pass in 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 is 1024 pixel * 768 pixel, first passs color element 125 need pass look processing to the first last position of these 10 video signal datas and the second last position with 256*192 large color-succession shielding.For instance, the value of supposing A11 is ' 10 ', for the pixel Pin of position corresponding A 11 in these 10 video signal datas, first passs color element 125 can be by ' 10 ' and 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 ' is greater than ' 01 ', first passs color element 125 is about to ' 100 ' and add Pin to produce the pixel Pin ' (that is in the 3rd LSB of Pin locate carry to produce Pin ') of output; If ' xy ' is less than or equal to ' 01 ', first passs 125 pixel Pin ' (that is not-carry) that are directly used as output 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 are that four in little color-succession shielding 331 passed chromatic threshold value, this four binary value of passing chromatic threshold value can be set by control module 127 so that this four pass in chromatic threshold value one and equal ' 00 ', one equal ' 01 ', one equal ' 10 ', one equal ' 11 '; ...; By that analogy, d00, d01, d10 and d11 are that four in little color-succession shielding 334 passed chromatic threshold value, this four binary value of passing chromatic threshold value can be set by control module 127 so that this four pass in 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 is 1024*768, second passs color element 126 need pass look processing to the 3rd last position of these 10 video signal datas and the 4th last position with 512*384 little color-succession shielding.For instance, the value of supposing a11 is ' 01 ', for the first pixel Pin ' that passs the corresponding a11 of 125 outgoing positions of color element, second passs color element 126 can be by ' 0100 ' add that Pin ' is to produce the pixel Pout of output.Certainly, second passs color element 126 also can compare ' 10 ' with the four ' pq ' third from the bottom of pixel Pin ', if ' pq ' is greater than ' 10 ', second passs color element 126 can be by ' 10000 ' and add Pin ' to produce the pixel Pout (that is in the 5th LSB of Pin ' locate carry to produce Pout) of output; If ' pq ' is less than or equal to ' 10 ', second passs 126 pixel Pout (that is not-carry) that are directly used as output with Pin ' of color element.Finally, second pass color element 126 output and pass the first six anteposition (Most Significant Bit, MSB) of each pixel data after look and using 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 time field (time domain) is provided, control module 127 is adjusted in the plurality of large color-succession shielding the content of at least one frame by frame.The large color-succession shielding 310 shown in Fig. 3 of take is example, every a frame, control module 127 can be by position clockwise (or inverse clock) 90-degree rotation of four sub-color-succession shieldings 311,312,313 in large color-succession shielding 310 and 314 (or 180,270 degree), and not changing the content of four sub-color-succession shieldings 311,312,313 and 314, Fig. 4 is the example of the position clockwise 90-degree rotation of four sub-color-succession shieldings 311,312,313 and 314 shown in left side.
Similarly, for the chromatic effect of passing on time field is provided, control module 127 is adjusted in the plurality of little color-succession shielding the content of at least one frame by frame.The little color-succession shielding 331,332,333 and 334 shown in Fig. 3 of take is example, every a frame, control module 127 can will be passed chromatic threshold value clockwise (or inverse clock) 90-degree rotation (or 180,270 degree) in four little color-succession shieldings 331,332,333 and 334, and do not change shown in the ，Tu4 right side, position of four little color-succession shieldings 331,332,333 and 334, be by little color-succession shielding 331 and 333 pass chromatic threshold value clockwise 90-degree rotation and by the example of passing chromatic threshold value inverse clock 90-degree rotation in little color- succession shielding 332 and 334.
And control module 127 can be passed the program-controlled unit (Programmingunit) in look module 124 at last, it can be according to the running demand of LCD100 the setting of user or manufacturer (or according to), adaptive ground (adaptively) set first pass that color element 125 and/or second passs that color element 126 uses respectively pass chromatic threshold value.In addition, control module 127 also can be according to the running demand of LCD100 the setting of user or manufacturer (or according to), and adaptive ground determines that the sense of rotation of the sub-color-succession shielding in each large color-succession shielding and/or adaptive ground determine the sense of rotation of passing chromatic threshold value in each little color-succession shielding.One of reference frame when for instance, the practiced Polarity Control of LCD100 (Polarity control) mode can be used as control module 127 running.
Although the data driver 130 in the LCD100 of the present embodiment only possesses the ability of processing 6 bit data, but by the performed running of data processor 120, LCD100 can present the effect of 8 video signal datas, in addition, the practiced look technology of passing of the present embodiment can't cause character used in proper names and in rendering some foreign names agate decline (Gammadegeneracy), therefore LCD100 can correctly demonstrate all color ranges that comprise in these 8 video signal datas.
The foregoing is only preferred embodiment of the present invention, 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 (26)
1. pass look one M position video signal data to produce a method for a N position video signal data, it includes:
With a plurality of large color-succession shieldings, one first group of last position in this M position video signal data being passed to look processes, wherein each in the plurality of large color-succession shielding all includes a plurality of sub-color-succession shieldings, and each in the plurality of sub-color-succession shielding all includes a plurality of chromatic threshold values of passing;
With a plurality of little color-succession shieldings, one second group of last position in this M position video signal data is passed to look and process, wherein each in the plurality of little color-succession shielding all includes a plurality of chromatic threshold values of passing; And
Adjust frame by frame in the plurality of large color-succession shielding at least one content and/or the plurality of little color-succession shielding at least one content.
2. the method for claim 1, wherein adjust frame by frame in the plurality of large color-succession shielding at least one content and/or the plurality of little color-succession shielding at least one the step of content include:
Rotate frame by frame at least one in the plurality of large color-succession shielding; And/or
Rotate frame by frame at least one in the plurality of little color-succession shielding.
3. method as claimed in claim 2, it also includes:
Adaptive ground determine in the plurality of large color-succession shielding of rotation at least one sense of rotation and/or rotate at least one the sense of rotation in the plurality of little color-succession shielding.
4. method as claimed in claim 2, it also includes:
The Polarity Control mode of using when playing this N position video signal data decide in the plurality of large color-succession shielding of rotation at least one sense of rotation and/or rotate at least one the sense of rotation in the plurality of little color-succession shielding.
5. the method for claim 1, it also includes:
Adaptive ground is set passing in the plurality of large color-succession shielding and is passed chromatic threshold value in chromatic threshold value and/or the plurality of little color-succession shielding.
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 the plurality of large color-succession shielding all includes four sub-color-succession shieldings, each in this four sub-color-succession shielding all includes four and passs chromatic threshold value, and each in the plurality of little color-succession shielding all includes four and passs 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 a look module, be used for passing look one M position video signal data to produce a N position video signal data, this is passed look module and includes:
One first passs color element, it is passed look with a plurality of large color-succession shieldings to one first group of last position in this M position video signal data and processes, wherein each in the plurality of large color-succession shielding all includes a plurality of sub-color-succession shieldings, and each in the plurality of sub-color-succession shielding all includes a plurality of chromatic threshold values of passing;
One second passs color element, and it is passed look with a plurality of little color-succession shieldings to one second group of last position in this M position video signal data and processes, and wherein each in the plurality of little color-succession shielding 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 the plurality of large color-succession shielding the content of at least one frame by frame, and/or adjusts frame by frame in the plurality of little color-succession shielding the content of at least one.
The 11. look modules of passing as claimed in claim 10, wherein this control module rotates at least one in the plurality of large color-succession shielding frame by frame, and/or rotates frame by frame at least one in the plurality of little color-succession shielding.
The 12. look modules of passing as claimed in claim 11, wherein this control module adaptive ground determine in the plurality of large color-succession shielding of rotation at least one sense of rotation and/or rotate at least one the sense of rotation in the plurality of little color-succession shielding.
The 13. look modules of passing as claimed in claim 11, the Polarity Control mode that wherein this control module is used when playing this N position video signal data decide in the plurality of large color-succession shielding of rotation at least one sense of rotation and/or rotate at least one the sense of rotation in the plurality of little color-succession shielding.
The 14. look modules of passing as claimed in claim 10, wherein this control module adaptive ground is set passing in the plurality of large color-succession shielding and is passed chromatic threshold value in chromatic threshold value and/or the plurality of little color-succession shielding.
The 15. look modules 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.
The 16. look modules of passing as claimed in claim 10, wherein each in the plurality of large color-succession shielding all includes four sub-color-succession shieldings, each in this four sub-color-succession shielding all includes four and passs chromatic threshold value, and each in the plurality of little color-succession shielding all includes four and passs chromatic threshold value.
The 17. look modules of passing as claimed in claim 10, wherein M equals 10, and N equals 6.
18. 1 kinds of liquid crystal display, it includes:
One Display Panel;
One data processor, it includes:
One mapping block, is used for a L position video signal data to be mapped to a M position video signal data; And
One passs 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,
Wherein, this is passed look module and includes:
One first passs color element, it is passed look with a plurality of large color-succession shieldings to one first group of last position in this M position video signal data and processes, wherein each in the plurality of large color-succession shielding all includes a plurality of sub-color-succession shieldings, and each in the plurality of sub-color-succession shielding all includes a plurality of chromatic threshold values of passing; And
One second passs color element, and it is passed look with a plurality of little color-succession shieldings to one second group of last position in this M position video signal data and processes, and wherein each in the plurality of little color-succession shielding all includes a plurality of chromatic threshold values of passing.
19. liquid crystal display as claimed in claim 18, wherein L equals 8, M equals 10, and N equals 6.
20. liquid crystal display as claimed in claim 18, wherein this is passed look module and also includes:
One control module, be coupled to this first and second pass color element, this control module is adjusted in the plurality of large color-succession shielding the content of at least one frame by frame, and/or adjusts frame by frame in the plurality of little color-succession shielding the content of at least one.
21. liquid crystal display as claimed in claim 20, wherein this control module rotates at least one in the plurality of large color-succession shielding frame by frame, and/or rotates frame by frame at least one in the plurality of little color-succession shielding.
22. liquid crystal display as claimed in claim 21, wherein this control module adaptive ground determine in the plurality of large color-succession shielding of rotation at least one sense of rotation and/or rotate at least one the sense of rotation in the plurality of little color-succession shielding.
23. liquid crystal display as claimed in claim 21, the Polarity Control mode that wherein this control module is used when playing this N position video signal data decide in the plurality of large color-succession shielding of rotation at least one sense of rotation and/or rotate at least one the sense of rotation in the plurality of little color-succession shielding.
24. liquid crystal display as claimed in claim 20, wherein this control module adaptive ground is set passing in the plurality of large color-succession shielding and is passed chromatic threshold value in chromatic threshold value and/or the plurality of little color-succession shielding.
25. liquid crystal display as claimed in claim 18, 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.
26. liquid crystal display as claimed in claim 18, wherein each in the plurality of large color-succession shielding all includes four sub-color-succession shieldings, each in this four sub-color-succession shielding all includes four and passs chromatic threshold value, and each in the plurality of little color-succession shielding all includes four and passs chromatic threshold value.
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| 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 |
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| KR100995631B1 (en) * | 2004-03-31 | 2010-11-19 | 엘지디스플레이 주식회사 | Method and apparatus for processing data in liquid crystal display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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