WO2015100821A1 - 用于补偿液晶显示器的数据线阻抗的方法 - Google Patents
用于补偿液晶显示器的数据线阻抗的方法 Download PDFInfo
- Publication number
- WO2015100821A1 WO2015100821A1 PCT/CN2014/071104 CN2014071104W WO2015100821A1 WO 2015100821 A1 WO2015100821 A1 WO 2015100821A1 CN 2014071104 W CN2014071104 W CN 2014071104W WO 2015100821 A1 WO2015100821 A1 WO 2015100821A1
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- WO
- WIPO (PCT)
- Prior art keywords
- impedance
- data line
- value
- compensation
- data
- Prior art date
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Classifications
-
- 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
-
- 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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
Definitions
- FIG. 1 is a schematic diagram showing the structure of a panel of a data driving unit (source IC) in the prior art. Referring to Fig. 1, for a large-sized panel, the impedance difference between the intermediate data line of the panel near the data driving unit (source IC) and the data line at both ends of the panel remote from the data driving unit (source IC) is large.
- Fig. 2 schematically shows the impedance of the data line in an ideal state, wherein the abscissa indicates the row number of the data line, and the ordinate indicates the impedance value of the data line of the different row numbers.
- R0 schematically represents an ideal impedance (ie, a reference value of impedance compensation)
- a solid black line schematically represents an impedance value of a data line of a different row number in an ideal state
- R1 schematically represents a minimum data in an ideal state.
- Line impedance value ie, a reference value of impedance compensation
- the data line impedance value is a decreasing arithmetic progression for the data lines X(l) to X( «), and the data line impedance value is incremented for the data line ⁇ ( ⁇ +1) to 2n) The number of arithmetic progressions.
- the impedance values corresponding to the data lines X(n) and ⁇ ( ⁇ +1) are the smallest, and are the minimum data line impedance values R1.
- Fig. 3 schematically shows the compensation impedance in an ideal state; wherein the abscissa indicates the row number of the data line, and the ordinate indicates the impedance compensation value.
- the abscissa indicates the row number of the data line
- the ordinate indicates the impedance compensation value.
- the solid black line schematically represents the impedance compensation value of the data lines of different apostrophes in the ideal state.
- the data line impedance compensation value is an increasing arithmetic progression for the data lines X(l) to X(n), and the data line impedance compensation value is for the data line X (ii+ 1) to X (2n) for delivery Reduced arithmetic progression.
- the impedance compensation value corresponding to the data line and X(n+1) is the largest, which is R.0-R in FIG. 1, which is the difference between the ideal impedance value and the minimum data line impedance value.
- Figure 4 shows the total load impedance of the data drive unit under ideal conditions. It can be seen that the function image of the total load impedance under ideal conditions is a straight line, that is, the total impedance values of the loads corresponding to all the data lines are equal, equal to the ideal impedance value R0.
- Figures 2, 3, and 4 illustrate the results of the prior art impedance compensation scheme in the ideal state T.
- the data line impedance compensation in the actual situation will be described below with reference to Figs. 5, 6, and 7.
- the present invention proposes an improved method for compensating the impedance value of the data line.
- the present invention proposes a method of compensating for the impedance of a data line of a liquid crystal display.
- the method includes the following steps: setting step: setting a memory and a subtractor; measuring step: measuring an impedance value of the data line to be compensated, and inputting the impedance value into the memory; calculating step: passing the subtractor Calculating the impedance value measured in the measuring step to obtain the impedance compensation value required for the corresponding data line: a compensation step: reading the impedance compensation value obtained in the calculating step by the data driving unit, and compensating according to the impedance
- the values are impedance compensated for the corresponding data lines to obtain the total load impedance corresponding to the corresponding data lines.
- the function image of the total impedance of the load according to the method of the present invention is a straight line, i.e., the total load impedance values corresponding to all of the data lines are equal. This is because the method according to the present invention effectively compensates for fluctuations in data line impedance values caused by actual processes. The uniform and ideal display effect is ensured, and the display defects such as vertical black and white bands and color shift are avoided.
- the memory and the subtractor are disposed on a printed circuit board of the liquid crystal display.
- the memory and the subtractor are disposed on a printed circuit board of the liquid crystal display.
- the impedance value of the data line to be compensated is measured by a contact measuring method or a non-contact measuring method.
- the actual impedance value of the data line to be compensated can be accurately and conveniently obtained, which lays a foundation for the calculation step and the compensation step.
- the step of traversing is performed in an array substrate testing process. This way of operation can effectively save process procedures and reduce production costs.
- the impedance values of all the data lines located in the display area and the non-display area of the liquid crystal display are measured.
- the subtractor acquires the impedance compensation value by acquiring a difference between an impedance value of a data line measured in the measurement step and a reference impedance value.
- This acquisition method is the quickest, most convenient, and most efficient, and can accurately compensate the data line impedance to obtain equal load total impedance output and uniform display.
- the total load impedance is equal to the maximum data line impedance value measured in the measuring step.
- the number of data lines is 2 ⁇ , and the data lines are sequentially arranged from one side to the other side, and the impedance compensation values corresponding to the nth data line and the n +1th data line are equal and The maximum value of the obtained impedance compensation values, and/or the impedance compensation value corresponding to the ith data line and the 2 nth data line are equal and is the minimum value of the acquired impedance compensation values. This matches and complements the data line impedance values measured during the measurement step, ensuring the uniformity of the final load total impedance output.
- the method according to the invention effectively compensates for fluctuations in the impedance of the data line caused by the actual process with respect to the ideal theoretical value. It ensures a uniform and ideal display effect, avoiding display defects such as vertical black and white bands and color cast.
- FIG. 1 is a schematic structural view of an array substrate of a thin film transistor liquid crystal display
- Figure 2 shows the data line impedance distribution under ideal conditions
- Figure 3 shows the compensated impedance distribution under ideal conditions
- Figure 4 shows the total load impedance distribution of the data drive unit under ideal conditions
- Figure 5 shows the actual data line impedance distribution in the prior art
- Figure 6 shows the compensated impedance distribution in the prior art
- Figure 7 shows the total load impedance distribution of the data driving unit in the prior art
- Figure 9 is a schematic illustration of the compensated impedance distribution of the present invention - Figure 10 shows the total load impedance distribution of the data drive unit of the present invention
- Figure 11 shows a flow chart of a method according to the invention
- Figure 12 is a diagram showing the signal input and output of the data driving unit according to the present invention.
- Measurement step The impedance value of the data line to be compensated is measured, and the impedance value is input to the memory.
- the impedance value of the data line to be compensated can be measured by a contact measurement method or a non-contact measurement method.
- the measurement steps can be performed in an array substrate test process.
- the impedance values of all of the data lines located in the display area and the non-display area of the liquid crystal display are measured. In this way, all data lines can be compensated at one time, so that the compensation effect is the best, the display picture is the best, and the vertical black and white band or color shift and color unevenness are avoided in any area.
- the subtractor can obtain the impedance compensation value by obtaining the difference between the impedance value of the data line traced back in the measuring step and the reference impedance value.
- the reference impedance value can be the largest data line impedance value measured during the measurement step.
- the number of data lines is 2 ⁇ , and the data lines are sequentially arranged from one side to the other side, and the impedance compensation values corresponding to the nth data line and the 11th data line are Equal and acquired
- the maximum value of the impedance compensation values, and/or the impedance compensation value corresponding to the first data line and the second n data line are equal to the minimum value of the obtained impedance compensation values.
- Figure 8 shows schematically the actual data line impedance measured during the measurement step.
- the content of Fig. 8 is identical to that of Fig. 5, and is inconsistent with the contents of Fig. 2. This is because the actual process results in an impedance distribution of the actual data line relative to the ideal data line impedance distribution shown in Fig. 2, which is not an arithmetic progression but has an irregular fluctuation deviation.
- Figure 9 shows the compensated impedance distribution of the method according to the invention.
- the impedance value of each data line is measured separately according to the method of the present invention and stored by a memory.
- the subtractor calculates the desired reference impedance value and the data line impedance value in FIG. 8 measured in the measuring step to obtain the difference between the two, and uses the difference as the desired impedance.
- the compensation value is recorded.
- Figure 10 shows the total load impedance of the data driving unit of the present invention. It can be seen that the function image of the total impedance of the load according to the method of the present invention is a straight line, that is, the total impedance values of the loads corresponding to all the data lines are equal, equal to the ideal impedance value R0. This is because the method according to the present invention effectively compensates for fluctuations in data line impedance values caused by actual processes.
- the image of Figure 10 coincides with the image of Figure 4 of the ideal case. The uniform and ideal display effect is ensured, and the display defects such as vertical black and white bands and color shift are avoided.
- Figure 12 is a diagram showing the signal input and output of the data driving unit according to the present invention. The invention can be assisted in understanding. It can be seen that in the compensation step, the data driving unit receives the signal of the impedance compensation value and outputs the total load impedance signal for the data line.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/240,387 US9620069B2 (en) | 2013-12-31 | 2014-01-22 | Method for compensating impedances of data lines of liquid crystal display |
JP2016543713A JP6357237B2 (ja) | 2013-12-31 | 2014-01-22 | 液晶表示装置のデータラインの抵抗の補償方法 |
GB1609367.6A GB2534817B (en) | 2013-12-31 | 2014-01-22 | Method for compensating impedances of data lines of liquid crystal display |
KR1020167020080A KR20160102285A (ko) | 2013-12-31 | 2014-01-22 | 액정 디스플레이의 데이터라인 저항을 보상하기 위한 방법 |
RU2016125811A RU2651220C2 (ru) | 2013-12-31 | 2014-01-22 | Способ компенсации импедансов линий данных жидкокристаллического дисплея |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310751723.0 | 2013-12-31 | ||
CN201310751723.0A CN103761950B (zh) | 2013-12-31 | 2013-12-31 | 用于补偿液晶显示器的数据线阻抗的方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015100821A1 true WO2015100821A1 (zh) | 2015-07-09 |
Family
ID=50529179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2014/071104 WO2015100821A1 (zh) | 2013-12-31 | 2014-01-22 | 用于补偿液晶显示器的数据线阻抗的方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9620069B2 (zh) |
JP (1) | JP6357237B2 (zh) |
KR (1) | KR20160102285A (zh) |
CN (1) | CN103761950B (zh) |
GB (1) | GB2534817B (zh) |
RU (1) | RU2651220C2 (zh) |
WO (1) | WO2015100821A1 (zh) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI576804B (zh) * | 2015-11-23 | 2017-04-01 | 友達光電股份有限公司 | 可調整驅動訊號的顯示器及其調整方法 |
US20180254004A1 (en) * | 2017-03-06 | 2018-09-06 | Novatek Microelectronics Corp. | Integrated circuit for driving display panel and fan-out compensation method thereof |
KR102580221B1 (ko) | 2018-12-04 | 2023-09-20 | 삼성디스플레이 주식회사 | 표시 장치 및 이를 이용한 표시 패널의 구동 방법 |
US11864435B2 (en) * | 2019-11-15 | 2024-01-02 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Array substrate and display device |
CN115527496A (zh) * | 2022-10-08 | 2022-12-27 | 厦门天马显示科技有限公司 | 一种显示面板的驱动补偿方法、补偿系统和显示设备 |
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2013
- 2013-12-31 CN CN201310751723.0A patent/CN103761950B/zh active Active
-
2014
- 2014-01-22 US US14/240,387 patent/US9620069B2/en active Active
- 2014-01-22 KR KR1020167020080A patent/KR20160102285A/ko not_active Application Discontinuation
- 2014-01-22 WO PCT/CN2014/071104 patent/WO2015100821A1/zh active Application Filing
- 2014-01-22 GB GB1609367.6A patent/GB2534817B/en active Active
- 2014-01-22 JP JP2016543713A patent/JP6357237B2/ja active Active
- 2014-01-22 RU RU2016125811A patent/RU2651220C2/ru active
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CN1293476A (zh) * | 1999-10-19 | 2001-05-02 | 东芝株式会社 | 用于抑制传输线内的电压起伏的方法以及系统 |
EP1298810A2 (en) * | 2001-09-27 | 2003-04-02 | Kabushiki Kaisha Toshiba | Portable type radio equipment |
US20070085609A1 (en) * | 2005-09-30 | 2007-04-19 | Grigory Itkin | Transmitting arrangement and method for impedance matching |
CN102347745A (zh) * | 2010-08-04 | 2012-02-08 | 国基电子(上海)有限公司 | 自适应阻抗匹配电路 |
Also Published As
Publication number | Publication date |
---|---|
KR20160102285A (ko) | 2016-08-29 |
US20150185575A1 (en) | 2015-07-02 |
JP6357237B2 (ja) | 2018-07-11 |
RU2651220C2 (ru) | 2018-04-18 |
RU2016125811A (ru) | 2018-01-10 |
JP2017503210A (ja) | 2017-01-26 |
CN103761950B (zh) | 2016-02-24 |
GB2534817A (en) | 2016-08-03 |
GB201609367D0 (en) | 2016-07-13 |
US9620069B2 (en) | 2017-04-11 |
CN103761950A (zh) | 2014-04-30 |
GB2534817B (en) | 2020-08-19 |
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