CN105390113A - Liquid crystal display device and data signal compensation method - Google Patents
Liquid crystal display device and data signal compensation method Download PDFInfo
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- CN105390113A CN105390113A CN201510934387.2A CN201510934387A CN105390113A CN 105390113 A CN105390113 A CN 105390113A CN 201510934387 A CN201510934387 A CN 201510934387A CN 105390113 A CN105390113 A CN 105390113A
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- data signal
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- 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
- G09G3/3614—Control of polarity reversal in general
Abstract
The invention discloses a liquid crystal display device which comprises a panel, a data driving module and a control module. The control module is used for receiving an nth frame original data signal and generating an nth frame compensation data signal. The control module comprises a lookup table and a polarity change judgment unit. The lookup table comprises a plurality of gray scale compensation values corresponding to the nth frame original data signal and an (n-1)th frame original data signal; and the polarity change judgment unit is used for judging whether the polarity of the nth frame original data signal is same with that of the (n-1)th frame original data signal, n being a natural number.
Description
[technical field]
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of liquid crystal display and compensation data signal method.
[background technology]
Liquid crystal display obtains develop rapidly because little, lightweight, the low in energy consumption and display quality of its volume is excellent.Along with the raising of people's quality of life, large scale liquid crystal display device liking more and more by people.Along with the increase of liquid crystal display size, the also corresponding increase of the equivalent capacitive reactance of the data drive signal line of liquid crystal display and equiva lent impedance, this can cause pixel charging delay serious, the problem of pixel undercharge.
From the dot structure of liquid crystal display and the characteristic of liquid crystal, liquid crystal pixel driving voltage must have reversal of poles, now conventional inversion mode reverses a little (dotinversion), row reversion (columninversion), two row reversion (2lineinversion) and add two row reversion (1+2lineinversion) etc.The large scale liquid crystal display device of application 2lineinversion or 1+2lineinversion isoinversion mode, because of the equivalent capacitive reactance of its data drive signal line and equiva lent impedance larger, postpone serious during pixel charging, but, when reversal of poles, cause pure color picture lower part pixel undercharge, brightness is partially dark.
With reference to figure 1, illustrate the schematic diagram of the liquid crystal display adopting 2lineinversion inversion mode according to prior art.From polarity (POL) signal, when data driving chip drives odd number pixel rows, the electric charge of whole piece data signal line need be updated to the electric charge (relative common electrode current potential) of another kind of polarity by data driving chip, because the equivalent capacitive reactance of liquid crystal panel data signal line is larger, therefore, when driving odd number pixel rows, pixel potential rises more slow, pixel undercharge, brightness is partially dark.But when driving even pixel row, because pixel drive voltage polarity does not need change, the electric charge of the data signal line of liquid crystal display need change less, and therefore even pixel row charging is fuller, and brightness is larger.Therefore when showing low GTG pure color picture, same column pixel will there will be the phenomenon of bright dark Alternation Display.
Therefore, need to propose liquid crystal display and compensation data signal method, to overcome the problem of the partial pixel undercharge of the large scale liquid crystal display device for 2lineinversion or 1+2lineinversion isoinversion mode.
[summary of the invention]
For achieving the above object, the invention provides a kind of liquid crystal display, comprise panel, data-driven module and control module.
Described panel comprises multiple pixel column.Data-driven module comprises multiple data driving chip, and described multiple data driving chip is connected to described multiple pixel column respectively.Described control module connects described data-driven module, and described control module is for receiving the n-th frame original data signal and producing the n-th frame offset data signal.
Described control module comprises look-up table, change in polarity judging unit and compensating module.Described look-up table comprises described n-th frame original data signal and the multiple gray scale compensation values corresponding to described (n-1)th frame original data signal, described change in polarity judging unit is for judging that whether pixel column described in each is identical with the polarity at the (n-1)th frame at the n-th frame, and n is natural number.Described compensating module is used for compensating described n-th frame original data signal according to the execution result of described look-up table and described change in polarity judging unit, to produce described n-th frame offset data signal.
In a preferred embodiment, the grey decision-making that the grey decision-making of described n-th frame offset data signal equals described n-th frame original data signal adds one of corresponding described multiple gray scale compensation values.
For achieving the above object, the invention provides a kind of compensation data signal method, especially for a kind of liquid crystal display, described liquid crystal display comprises control module, described control module comprises look-up table, change in polarity judging unit and compensating module, described compensation data signal method comprises: first, receives reception n-th frame original data signal by described data processing module; Then, when described change in polarity judging unit judges pixel column described in each at the n-th frame from when the polarity of the (n-1)th frame is different, compensate to produce the n-th frame offset data signal to described n-th frame original data signal by described compensating module.Described look-up table comprises described n-th frame original data signal and the multiple gray scale compensation values corresponding to described (n-1)th frame original data signal, and n is natural number.
In a preferred embodiment, when pixel column described in each at the n-th frame with when the polarity of the (n-1)th frame is identical, described compensation data signal method also comprises: then, and described compensating module does not compensate described n-th frame original data signal.
In a preferred embodiment, the grey decision-making that the grey decision-making of described n-th frame offset data signal equals described n-th frame original data signal adds one of corresponding described multiple gray scale compensation values.
Compared to prior art, the present invention by adding novel data processing module in existing image processing circuit, utilize the change in polarity judging unit of data processing module, when detecting reversal of poles, compensate the grey decision-making of the pixel after reversal of poles, gray scale compensation value is relevant with the difference of the grey decision-making that the grey decision-making that this pixel need show and this pixel of former frame need show.
[accompanying drawing explanation]
Fig. 1 illustrates the schematic diagram of the liquid crystal display adopting 2lineinversion inversion mode according to prior art;
Fig. 2 illustrates the Organization Chart of liquid crystal display of the present invention;
Fig. 3 illustrates the thin portion Organization Chart of the control module of Fig. 2;
Fig. 4 illustrates the look-up table of Fig. 3;
Fig. 5 illustrates the process flow diagram of compensation data signal method of the present invention.
[embodiment]
The explanation of following embodiment is graphic with reference to what add, can in order to the specific embodiment implemented in order to illustrate the present invention.The direction term that the present invention mentions, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side " etc., be only the direction with reference to annexed drawings.Therefore, the direction term of use is in order to illustrate and to understand the present invention, and is not used to limit the present invention.
Build Meetings with reference to figure 2 and Fig. 3.Fig. 2 illustrates the Organization Chart of liquid crystal display 100 of the present invention.Fig. 3 illustrates the thin portion Organization Chart of the control module 110 of Fig. 2.Described liquid crystal display 100 comprises panel 130, data-driven module 120 and control module 110.Described panel 130 comprises multiple pixel column 131.Described data-driven module 120 comprises multiple data driving chip 121, and described multiple data driving chip 121 is connected to described multiple pixel column 131 respectively.Described control module 110 connects described data-driven module 120,
Described control module 110 connects described data-driven module 120, and described control module 110 is for receiving the n-th frame original data signal 140 and producing the n-th frame offset data signal 150.
Described control module 110 comprises (overdrive) module 111 of overdriving, data processing (dataprocessing) module 112, color correction (dithering) module 113, little low voltage differential data signal receiver (LVDSReceiver) 114, white balance (whitetracking) module 115 and little low voltage differential data signal and launches (miniLVDStransmitter) device 116.Described module 111 of overdriving is for improving the reaction time of pixel.The color number that described color compensation module 113 can show for increasing each pixel, improves display effect.Described little low voltage differential data signal receiver 114 is for receiving the described original data signal 140 belonging to little low voltage differential data signal.Described white balance module 115 is for adjusting the white balance (whitebalance) of described original data signal 140.Described little low voltage differential data signal projector 116 belongs to the described offset data signal 150 of little low voltage differential data signal for exporting.
Described data processing module 112 comprises look-up table 1121, change in polarity judging unit 1122 and compensating module 1123, and described look-up table 1121 comprises described n-th frame original data signal 140 and the multiple gray scale compensation values corresponding to described (n-1)th frame original data signal 140.Whether described change in polarity judging unit 1122 is identical with the polarity at the (n-1)th frame at the n-th frame for pixel column described in each 131, and n is natural number.Described compensating module 1123 compensates described n-th frame original data signal 140 for the execution result according to described look-up table 1121 and described change in polarity judging unit 1122, to produce described n-th frame offset data signal 150.
With reference to figure 4, illustrate the schematic diagram of the look-up table 1121 of Fig. 3.X-axis is the grey decision-making of described (n-1)th frame original data signal 140, and Y-axis is the grey decision-making of described n-th frame original data signal 140, therefore can be clear and definite find corresponding gray scale compensation value according to both relations.In detail, the grey decision-making that the grey decision-making of described n-th frame offset data signal 140 equals described n-th frame original data signal 140 adds one of corresponding described multiple gray scale compensation values.For example, when the grey decision-making of described (n-1)th frame original data signal 140 is 128 and the grey decision-making of described n-th frame original data signal 140 is 192, corresponding gray scale compensation value is 6, and the grey decision-making of described n-th frame offset data signal 150 equals 198 (grey decision-making (the 192)+gray scale compensation values (6) of the n-th frame original data signal 140); When the grey decision-making of described (n-1)th frame original data signal 140 is 255 and the grey decision-making of described n-th frame original data signal 140 is 255, corresponding gray scale compensation value is 0 (namely when the grey decision-making of front and back two frame is all maximum, do not need to compensate, the grey decision-making of described n-th frame offset data signal 150 equals 255 (grey decision-making (the 255)+gray scale compensation values (0) of the n-th frame original data signal 140).In order to improve adjustability, this look-up table 1121 only will arrange an adjustable offset every certain grey decision-making, other offset utilize two-dimensional interpolation to obtain, do not repeat at this.
Fig. 5 illustrates the process flow diagram of compensation data signal method of the present invention.About component numerals, please refer to Fig. 2-Fig. 3, do not repeat at this.First, step S01 is performed, by described data processing module 112 reception n-th frame original data signal 140; Then, perform step S02, judge that whether pixel column 131 described in each is different from the polarity at the (n-1)th frame at the n-th frame by described change in polarity judging unit 1122; Then, when polarity is different, performs step S03, compensate to produce the n-th frame offset data signal 150 to described n-th frame original data signal 140 by described compensating module 1123.
In step S02, when pixel column described in each 131 at the n-th frame with when the polarity of the (n-1)th frame is identical, perform step S04, described compensating module 1123 does not compensate described n-th frame original data signal 140.
Preferably, described correcting circuit 11 is corrected described original data signal 160 by gamma correction mode.
In sum; although the present invention discloses as above with preferred embodiment; but above preferred embodiment is also not used to limit the present invention; those of ordinary skill in the art; without departing from the spirit and scope of the present invention; all can do various change and retouching, the scope that therefore protection scope of the present invention defines with claim is as the criterion.
Claims (5)
1. a liquid crystal display, comprises:
Panel, comprises multiple pixel column;
Data-driven module, comprises multiple data driving chip, and described multiple data driving chip is connected to described multiple pixel column respectively; And
Control module, connects described data-driven module, and described control module is for receiving the n-th frame original data signal and producing the n-th frame offset data signal;
It is characterized in that, described control module comprises look-up table, change in polarity judging unit and compensating module, described look-up table comprises the multiple gray scale compensation values corresponding to described n-th frame original data signal and the (n-1)th frame original data signal, described change in polarity judging unit is for judging that whether pixel column described in each is identical with the polarity at the (n-1)th frame at the n-th frame, n is natural number, described compensating module is used for compensating described n-th frame original data signal according to the execution result of described look-up table and described change in polarity judging unit, to produce described n-th frame offset data signal.
2. liquid crystal display as claimed in claim 1, is characterized in that, the grey decision-making that the grey decision-making of described n-th frame offset data signal equals described n-th frame original data signal adds one of corresponding described multiple gray scale compensation values.
3. a compensation data signal method, for liquid crystal display, described liquid crystal display comprises control module, and described control module comprises look-up table, change in polarity judging unit and compensating module, and described compensation data signal method comprises:
Reception n-th frame original data signal is received by described data processing module; And
When described change in polarity judging unit judges pixel column described in each at the n-th frame from when the polarity of the (n-1)th frame is different, compensate to produce the n-th frame offset data signal to described n-th frame original data signal by described compensating module;
It is characterized in that, described look-up table comprises described n-th frame original data signal and the multiple gray scale compensation values corresponding to described (n-1)th frame original data signal, and n is natural number.
4. compensation data signal method as claimed in claim 3, it is characterized in that, described compensation data signal method also comprises: when judging pixel column described in each at the n-th frame with when the polarity of the (n-1)th frame is identical, described compensating module does not compensate described n-th frame original data signal.
5. compensation data signal method as claimed in claim 3, is characterized in that, the grey decision-making that the grey decision-making of described n-th frame offset data signal equals described n-th frame original data signal adds one of corresponding described multiple gray scale compensation values.
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| CN105931612A (en) * | 2016-07-13 | 2016-09-07 | 京东方科技集团股份有限公司 | Source electrode driving circuit, source electrode driving method and display device |
| CN106057159A (en) * | 2016-08-05 | 2016-10-26 | 武汉华星光电技术有限公司 | Liquid crystal display (LCD) device, mobile terminal and method for driving LCD device |
| WO2017190428A1 (en) * | 2016-05-04 | 2017-11-09 | 深圳市华星光电技术有限公司 | Driving method for display panel and display device comprising display panel |
| WO2017206286A1 (en) * | 2016-06-03 | 2017-12-07 | 深圳市华星光电技术有限公司 | Method for color shift compensation |
| CN107507575A (en) * | 2017-10-24 | 2017-12-22 | 惠科股份有限公司 | A kind of display device and its driving method and drive system |
| CN108417184A (en) * | 2018-01-15 | 2018-08-17 | 友达光电股份有限公司 | Display device and gray scale compensation method of display panel |
| WO2019037177A1 (en) * | 2017-08-25 | 2019-02-28 | 惠科股份有限公司 | Pixel structure and application thereof in display panel |
| CN109741717A (en) * | 2019-03-26 | 2019-05-10 | 京东方科技集团股份有限公司 | Pixel compensation method, device, sequence controller, array substrate and display device |
| TWI670700B (en) * | 2018-07-24 | 2019-09-01 | 奇景光電股份有限公司 | Display method for display panel and display device |
| CN110827733A (en) * | 2018-08-07 | 2020-02-21 | 奇景光电股份有限公司 | Display method and display device for display panel |
| WO2020097986A1 (en) * | 2018-11-12 | 2020-05-22 | 惠科股份有限公司 | Display control apparatus and display device |
| CN111540324A (en) * | 2020-05-20 | 2020-08-14 | Tcl华星光电技术有限公司 | Display device and pixel compensation method and device thereof |
| CN111862879A (en) * | 2019-04-04 | 2020-10-30 | 三星显示有限公司 | Display device |
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| CN105931612B (en) * | 2016-07-13 | 2018-12-21 | 京东方科技集团股份有限公司 | source electrode drive circuit, method and display device |
| CN105931612A (en) * | 2016-07-13 | 2016-09-07 | 京东方科技集团股份有限公司 | Source electrode driving circuit, source electrode driving method and display device |
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| WO2019037177A1 (en) * | 2017-08-25 | 2019-02-28 | 惠科股份有限公司 | Pixel structure and application thereof in display panel |
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| CN108417184B (en) * | 2018-01-15 | 2021-10-08 | 友达光电股份有限公司 | Display device and gray scale compensation method of display panel |
| TWI670700B (en) * | 2018-07-24 | 2019-09-01 | 奇景光電股份有限公司 | Display method for display panel and display device |
| CN110827733A (en) * | 2018-08-07 | 2020-02-21 | 奇景光电股份有限公司 | Display method and display device for display panel |
| CN110827733B (en) * | 2018-08-07 | 2023-11-14 | 奇景光电股份有限公司 | Display method and display device for display panel |
| WO2020097986A1 (en) * | 2018-11-12 | 2020-05-22 | 惠科股份有限公司 | Display control apparatus and display device |
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| CN109741717A (en) * | 2019-03-26 | 2019-05-10 | 京东方科技集团股份有限公司 | Pixel compensation method, device, sequence controller, array substrate and display device |
| CN111862879A (en) * | 2019-04-04 | 2020-10-30 | 三星显示有限公司 | Display device |
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Application publication date: 20160309 |