WO2016026149A1 - Gamma电压产生模块以及液晶面板 - Google Patents
Gamma电压产生模块以及液晶面板 Download PDFInfo
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- WO2016026149A1 WO2016026149A1 PCT/CN2014/085042 CN2014085042W WO2016026149A1 WO 2016026149 A1 WO2016026149 A1 WO 2016026149A1 CN 2014085042 W CN2014085042 W CN 2014085042W WO 2016026149 A1 WO2016026149 A1 WO 2016026149A1
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- liquid crystal
- gray scale
- gray
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- crystal panel
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Classifications
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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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
- G09G3/3696—Generation of voltages supplied to electrode 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
- G09G3/20—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
- 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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
Definitions
- the present invention relates to the field of liquid crystal display technologies, and in particular, to a Gamma voltage generating module in a liquid crystal display and a liquid crystal panel including the Gamma voltage generating module.
- a liquid crystal display, or LCD Liquid Crystal Display
- LCD Liquid Crystal Display
- LCD monitors have low power consumption and are characterized by high image quality, small size, and light weight, so they are favored by everyone and become the mainstream of displays.
- Liquid crystal displays have been widely used in various electronic products, such as computer devices with display screens, mobile phones, or digital photo frames, and wide viewing angle technology is one of the development priorities of current liquid crystal displays.
- wide viewing angle technology is one of the development priorities of current liquid crystal displays.
- a wide-angle liquid crystal display often has a color shift phenomenon.
- 2D1G technology there has been an improvement in the industry using 2D1G technology.
- each pixel unit is divided into a main pixel area and a sub pixel area, and a main pixel area in the same pixel unit and
- the sub-pixel area is connected to different data lines (Data line) and the same scan line (Gate line).
- Data line data lines
- Gate line scan line
- a gray scale value of one pixel unit by setting the gray scale values of the main pixel area and the sub-pixel area, respectively, so that the combination of the gray scale values of the main pixel area and the sub-pixel area can achieve the problem of reducing the color shift.
- the driving of the liquid crystal display panel is performed by the gate driving module and the source driving module respectively supplying the scanning signal and the data signal to the liquid crystal display unit, and the voltage difference between the different data signal voltages and the common electrode voltage is caused.
- the liquid crystals have different rotation angles to form a difference in brightness, that is, the display of the liquid crystal panel forms different gray scales.
- the present invention provides a Gamma voltage generating module to solve the problem of requiring two sets of 0-255 gray-scale Gamma voltages to be supplied to a liquid crystal panel in 2D1G technology.
- a Gamma voltage generating module for providing a gamma voltage to a liquid crystal panel, the liquid crystal panel including a plurality of pixel units, each of the pixel units including a main pixel region M and a sub-pixel region S, wherein the Gamma voltage generating module includes: a reference voltage unit for supplying a reference voltage to the voltage dividing resistor string; a first voltage dividing resistor string coupled to the reference voltage unit, dividing the reference voltage Pressing to form a Gamma voltage corresponding to 0-255 gray scale is provided to the main pixel region M; a second voltage dividing resistor string is coupled to the reference voltage unit, and the reference voltage is divided to form a gray scale corresponding to 0-255.
- a Gamma voltage is supplied to the sub-pixel region S; wherein, in the first voltage-dividing resistor string and the second voltage-dividing resistor string, a Gamma voltage generating point of at least 0, Gx, Gx+1, and 255 gray scales A reference voltage is connected; wherein Gx is a gray scale corresponding to the luminance inversion when the gray scale G of one pixel unit is converted into the gray scale Gm of the main pixel region M and the gray scale Gs of the sub-pixel region S.
- the reference voltage is connected to the Gamma voltage generating points of the 0, 32, 128, Gx, Gx+1, and 255 gray levels.
- the reference voltages connected to the first voltage dividing resistor string and the second voltage dividing resistor string are different.
- the gray scale G of one pixel unit is converted into the gray scale Gm of the main pixel area M and the gray scale Gs combination of the sub-pixel area S by using the following method, including:
- ⁇ 2 LvMx ⁇ + LvSx ⁇ - LwGxfi;
- the corresponding gray scales Gmx and Gsx when y takes the minimum value is set to the gray scale input to the main pixel region M and the sub-pixel region S, respectively, when the pixel unit is at the gray scale Gx;
- step S105 is repeated to obtain gray scales Gm and Gs input to the main pixel area M and the sub-pixel area S, respectively, in all gray scales of the liquid crystal panel.
- the front view angle is “0°
- the squint angle is 30 ⁇ 80°.
- the squint angle is 60°.
- the gray scale of the liquid crystal panel includes 256 gray scales, ranging from 0 to 255, wherein the highest gray scale max is 255 gray scales.
- the actual brightness values l ⁇ a and Lv ⁇ are determined according to the gamma curve by acquiring a gamm curve of the liquid crystal panel at a front view angle and a squint angle.
- the relationship between the gray scale and the brightness of the main pixel region G Gm-Lv curve and the relationship between the gray scale and the brightness of the sub-pixel region S Gs-Lv curve are obtained, and the Gm-Lv curve is obtained.
- a liquid crystal panel comprising: a plurality of pixel units, each of which includes a main pixel area M and a sub-pixel area S, wherein the main pixel area M and the sub-pixel area S are Driving by the same scan signal, driven by different data signals; a gate driving module, providing a scan signal to the pixel unit; and a source driving module, providing a data signal to the pixel unit;
- a Gamma voltage generating module providing two sets of gamma voltages to the source driving module, so that the source driving module respectively supplies data signals to the main pixel area M and the sub-pixel area S; wherein the gamma voltage is generated
- the module is a Gamma voltage generation module as described above.
- the Gamma voltage generating unit is capable of generating two sets of 0-255 gray-scale Gamma voltages, and driving the main pixel area and the sub-pixel area respectively in the 2D1G technology; for each group of Gamma voltages, only The Gamma voltage generation points of 0, Gx, Gx+1, and 255 gray scales need to be connected with a reference voltage for voltage binding, and the number of bundled voltages is small, which reduces the design of the driver IC and the manufacturing process, and saves manufacturing costs. .
- FIG. 1 is a schematic structural view of a liquid crystal panel according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of a portion of a pixel unit of a liquid crystal panel according to an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of a Gamma voltage generating unit according to an embodiment of the present invention.
- FIG. 4 is a flowchart of a gray scale conversion method according to an embodiment of the present invention.
- FIG. 5 is a gamm graph before conversion in a gray scale conversion method according to an embodiment of the present invention.
- FIG. 6 is a gamm graph before conversion in a gray scale conversion method according to an embodiment of the present invention.
- FIG. 7 is a graph showing the relationship between gray scale and brightness after gray scale conversion according to an embodiment of the present invention.
- FIG. 8 is a diagram showing a pair of smoothing processes of the graph of FIG.
- FIG. FIG. 9 is a diagram showing a smoothing process of the graph of FIG. 6 using the second method of the embodiment of the present invention.
- FIG. 10 is a diagram showing a smoothing process of the graph of FIG. 6 by using the second method of the embodiment of the present invention.
- FIG. 11 is a diagram showing the smoothing process of the graph of FIG. 6 by using the second method according to the embodiment of the present invention.
- Figure 12 is a graphical representation of the Gm-V curve and the Gs-V curve calculated in accordance with an embodiment of the present invention.
- Figure 13 is a graphical representation of Gm-V curves and Gs-V curves after voltage binding in an embodiment of the present invention.
- FIG. 1 is a schematic structural view of a liquid crystal panel provided by this embodiment
- FIG. 2 is a schematic diagram of a part of a pixel unit of the liquid crystal panel in this embodiment.
- the liquid crystal panel provided in this embodiment includes a source driving module 10 , a gate driving module 20 , a liquid crystal display unit 30 , and a gamma voltage generating unit 50 .
- the source driving module 10 and the gate driving module 20 Controlled by the timing control module 40, respectively, the data signal and the scan signal are supplied to the liquid crystal display unit 30, respectively.
- the liquid crystal display unit 30 includes a plurality of pixel units 1 (only one of which is exemplarily shown in the drawing), and each of the pixel units 1 includes a main pixel region M and a sub pixel region (Sub pixel ) S
- the area ratio of the main pixel area M and the sub-pixel area S is a:b. As shown in FIG.
- the main pixel area M and the sub-pixel area S in the same pixel unit 1 are connected to different data lines Dn, Dn+i and the same scanning line Gn, respectively, to the main pixel area through the data lines Dn, Dn+i
- the M and sub-pixel regions S provide data signals of different gray scale values, and scan signals are supplied to the main pixel region M and the sub-pixel region S through the scan line Gn, that is, the main pixel region M and the sub-pixel region S in the same pixel unit 1 It is turned on by the same scan signal. As shown in FIG.
- the gamma voltage generating module 50 includes: a reference voltage unit 51 for supplying a reference voltage to the voltage dividing resistor strings 52, 53; a first voltage dividing resistor string 52 coupled to the reference voltage unit 51, The reference voltage is divided to form a Gamma voltage V0 ⁇ V255 corresponding to the 0-255 gray scale, and is supplied to the main pixel region M through the source driving module 10; the second voltage dividing resistor string 53 is coupled to the reference voltage unit. 51.
- the reference voltage is divided to form a Gamma voltage V0' ⁇ V255' corresponding to 0-255 gray scale, and is supplied to the sub-pixel region 8 through the source driving module 10.
- the reference voltages VF1, VF2, VF4, VF5, VF6, and VF7 are connected to the Gamma voltage generating points of the 0, 32, 128, Gx, Gx+1, and 255 gray levels. Voltage binding;
- the reference voltages VF1 ', VF2', VF4', VF5' are connected to the Gamma voltage generating points of the 0, 32, 128, Gx, Gx+1, and 255 gray levels.
- VF6 ' and VF7 ' for voltage binding.
- the reference voltage bound in the first voltage-dividing resistor string 52 and the second voltage-dividing resistor string 53 may be connected only at the Gamma voltage generation points of the 0, Gx, Gx+1, and 255 gray levels.
- the first voltage-dividing resistor string 52 and the second voltage-dividing resistor string 53 are voltage-bonded at least at the Gamma voltage generating points of 0 Gx Gx+1 and 255 gray scales, and the other points can be selectively bound according to actual needs, tied
- Gx refers to gray corresponding to the luminance inversion when the gray scale G of one pixel unit is converted into the gray scale Gm of the main pixel region M and the gray scale Gs of the sub-pixel region S.
- the following method is provided in the embodiment, as shown in FIG. Figure, the method includes steps:
- ⁇ 2 LvMx ⁇ + LvSx ⁇ - LwGxfi;
- the front view angle is "0" and the squint angle is 60°. In still other embodiments, the squint angle can also be selected from the range of 30 to 80 degrees.
- the front view angle refers to the positive viewing angle direction of the liquid crystal display
- the squint angle refers to the angle formed by the positive viewing angle direction of the liquid crystal display.
- the gray scale of the liquid crystal panel includes 256 gray scales, ranging from 0 to 255, wherein the highest gray scale max is 255 gray scales.
- the actual brightness values LvO and Lv60 are divided into LvM0, LvSO, LvM60 and LvSO, LvMO, LvSO, LvM60 and LvSO satisfies the following relationship:
- the gray scales input to the main pixel region M and the sub-pixel region S are Gmx and Gsx, respectively, according to the above established
- the actual brightness values LvMxO, LvMx60, LvSxO and LvSx60 corresponding to the gray levels Gmx and Gsx are obtained, according to the established gray level G and theoretical brightness.
- the theoretical luminance values corresponding to the gray scale Gx are obtained LvGxO and B LvGx60; Calculate the following relationship:
- ⁇ 2 LvMx60 + LvSx60 - LvGx60;
- the gamm curve of the liquid crystal panel at a front view angle of 0° and a squint angle of 60° is as shown in FIG. 6 .
- FIG. 7 is a graph showing the relationship Gm-Lv between the gray scale and the luminance of the main pixel region M and the gray scale and luminance Gs-Lv of the sub-pixel region S according to the above-described steps.
- the following method can be used to smooth the relationship curve:
- the LOWESS method is similar to the moving average technique. It is within the specified window. The value of each point is weighted and regressiond by the adjacent data in the window. The regression equation can be linear or quadratic. If the smoothed data points on both sides of the data point to be smoothed are equal within the specified window width, it is symmetric LOWESS, and if the data points on both sides are not equal, it is asymmetric LOWESS. In general, the LOWESS method includes the following steps:
- step (cl) Repeat the step (M) with the new weight, and modify the weight function continuously.
- the smooth value of any point can be obtained according to the polynomial and the weight.
- the key parameter for data smoothing using the LOWESS method is the selection of the window width. If the window width is too large, the smooth data will cover too much historical data and reduce the influence of the latest price information on the smoothed value. Conversely, the narrow window width will make the smoothing "The data after is not smooth.
- the relationship between the gray scale and the brightness processed according to the LOWESS method is as shown in Fig. 8, and includes the Gm-Lv curve of the main pixel area M and the Gs-Lv curve of the sub-pixel area S. The processed relationship curve is smooth, and the error occurring in the initial calculation is corrected, which improves the display quality of the liquid crystal display.
- FIG. 9 is a diagram for fitting the Gs-Lv curve of the relationship between the gray scale and the brightness of the sub-pixel region S.
- the abscissa indicates the gray scale value from the inverse gray scale
- the ordinate indicates the sub-pixel region.
- the gray scale corresponding to S, the curve powerl is the curve obtained by fitting; FIG.
- the relationship between the gray scale and the luminance processed according to the power function fitting processing method is as shown in FIG. 11 , and includes a Gm-Lv curve of the main pixel region M and a Gs-Lv curve of the sub-pixel region S.
- the processed relationship curve is smooth, which improves the display quality of the liquid crystal display, and the method using the power function fitting is simple, fast, and accurate.
- the voltage value V required for each gray level of Gm and Gs can be calculated and converted into a Gm-V curve and a Gs-V curve, as shown in FIG. 12, including The Gm-V curve of the main pixel area M and the Gs-Lv curve of the sub-pixel area S.
- the gray scale G of one pixel unit is converted into the gray scale Gm of the main pixel region M and the gray scale of the sub-pixel region S.
- the reference voltage points bound in the first voltage dividing resistor string 52 and the second voltage dividing resistor string 53 are 0, 32, 128, 157, 158, and 255 gray scales.
- the Gm-V curve and the Gs-V curve obtained by voltage binding are as shown in FIG. 13, and the Gm-V curve obtained by voltage binding of the main pixel region M and the voltage of the sub-pixel region S are bonded. Gs-Lv curve.
- the liquid crystal panel provided by the embodiment of the present invention divides each pixel unit into a main pixel area and a sub-pixel area with different areas, and inputs different data signals to the main pixel area and the sub-pixel area (different Gray scale value), which produces different display brightness and squint brightness, to reduce the color shift problem caused by side view or squint.
- the gamma voltage generating unit provided by the embodiment of the present invention is capable of generating two sets of 0-255 gray-scale Gamma voltages, and driving the main pixel area and the sub-pixel area respectively in the 2D1G technology; for each group of gamma voltages, only need to be 0
- the Gamma voltage generation points of Gx, Gx+1 and 255 gray scales are connected with a reference voltage for voltage binding, and the number of voltages to be bound is small, which reduces the design of the driver IC and the difficulty of the manufacturing process, thereby saving manufacturing costs.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2017509037A JP6542873B2 (ja) | 2014-08-18 | 2014-08-22 | Gamma電圧発生モジュールの設計方法、Gamma電圧発生モジュール及び液晶パネル |
US14/387,085 US9536485B2 (en) | 2014-08-18 | 2014-08-22 | Gamma voltage generating module and liquid crystal panel |
RU2017104885A RU2667383C2 (ru) | 2014-08-18 | 2014-08-22 | Модуль генерирования гамма-напряжения и жидкокристаллическая панель |
GB1700357.5A GB2542529B (en) | 2014-08-18 | 2014-08-22 | Gamma voltage generating module and liquid crystal panel |
KR1020177007471A KR101943865B1 (ko) | 2014-08-18 | 2014-08-22 | 감마 전압 생성 모듈 및 액정 패널 |
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CN201410410153.3 | 2014-08-18 | ||
CN201410410153.3A CN104157254B (zh) | 2014-08-18 | 2014-08-18 | Gamma电压产生模块以及液晶面板 |
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JP (1) | JP6542873B2 (zh) |
KR (1) | KR101943865B1 (zh) |
CN (1) | CN104157254B (zh) |
GB (1) | GB2542529B (zh) |
RU (1) | RU2667383C2 (zh) |
WO (1) | WO2016026149A1 (zh) |
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CN113409732A (zh) * | 2021-06-30 | 2021-09-17 | 惠州华星光电显示有限公司 | 驱动电路以及驱动电路的驱动方法 |
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CN106709587B (zh) * | 2015-11-13 | 2021-03-02 | 中国电力科学研究院 | 一种基于常规天气预报的直接辐射预测方法 |
TWI603314B (zh) * | 2016-11-30 | 2017-10-21 | 友達光電股份有限公司 | 顯示器的控制方法 |
CN109147686B (zh) * | 2018-07-30 | 2020-05-19 | 深圳市华星光电半导体显示技术有限公司 | 显示控制电路、方法及平面显示装置 |
CN109658899B (zh) * | 2019-02-28 | 2021-01-29 | 昆山龙腾光电股份有限公司 | 电压切换电路、伽马电压产生电路及液晶显示装置 |
US11164498B1 (en) | 2020-04-17 | 2021-11-02 | Tcl China Star Optoelectronics Technology Co., Ltd. | Display panel and test method thereof |
CN111415590A (zh) * | 2020-04-17 | 2020-07-14 | Tcl华星光电技术有限公司 | 显示面板及其测试方法 |
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GB2542529B (en) | 2020-07-01 |
JP2017530391A (ja) | 2017-10-12 |
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KR101943865B1 (ko) | 2019-01-31 |
CN104157254A (zh) | 2014-11-19 |
RU2667383C2 (ru) | 2018-09-19 |
CN104157254B (zh) | 2017-04-19 |
GB201700357D0 (en) | 2017-02-22 |
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