WO2020248352A1 - 伽马电压输出电路及其掉阶修复方法、源极驱动器 - Google Patents

伽马电压输出电路及其掉阶修复方法、源极驱动器 Download PDF

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WO2020248352A1
WO2020248352A1 PCT/CN2019/099697 CN2019099697W WO2020248352A1 WO 2020248352 A1 WO2020248352 A1 WO 2020248352A1 CN 2019099697 W CN2019099697 W CN 2019099697W WO 2020248352 A1 WO2020248352 A1 WO 2020248352A1
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gray
ratio
scale
circuit
resistance
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French (fr)
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傅晓立
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Definitions

  • This application relates to the field of display technology, and in particular to a gamma voltage output circuit and its step-drop repair method, and a source driver.
  • S-COF Source Chip On Film
  • the gamma voltage output by the gamma voltage generating circuit in the chip will fluctuate, which will eventually cause the display device to display a screen drop phenomenon, which will affect the overall image quality of the display. , which has a serious impact on the quality of the product.
  • the purpose of the present application is to provide a gamma voltage output circuit and its step-down repair method, and a source driver to solve the problem that the gamma voltage output circuit affects the display effect of the display device due to the fluctuation of the gamma voltage.
  • the gamma voltage output circuit includes at least one level drop gray level circuit and at least one normal gray level circuit, each of the level drop gray level circuits and each of the normal gray level circuits.
  • the gray-scale circuits each include a plurality of resistors connected in series and wires connected to the resistors, and the resistance of the parasitic resistance of the wires of each of the dropped gray-scale circuits is less than the resistance of the resistor corresponding to the dropped gray-scale circuit.
  • the ratio of the sum is A
  • the ratio of the resistance of the parasitic resistance of each of the normal gray-scale circuits to the sum of the resistance of the corresponding normal gray-scale circuit is B.
  • the method includes the following steps: The resistance value of the parasitic resistance of the trace of the gray-scale circuit is described so that the absolute value of the difference between the ratio A and the ratio B is a preset value.
  • the resistance value of the trace parasitic resistance of the step drop gray-scale circuit is adjusted so that the absolute value of the difference between the ratio A and the ratio B is
  • the preset value includes the following steps:
  • the absolute value of the difference between the ratio A and the ratio B is a preset value.
  • the resistance value of the trace parasitic resistance of the step drop gray-scale circuit is adjusted so that the absolute value of the difference between the ratio A and the ratio B is
  • the preset value includes the following steps:
  • the absolute value of the difference between the ratio A and the ratio B is a preset value.
  • the resistance value of the trace parasitic resistance of the step drop gray-scale circuit is adjusted so that the absolute value of the difference between the ratio A and the ratio B is
  • the preset value includes the following steps:
  • the absolute value of the difference between the A and the B is a preset value.
  • the preset value is greater than or equal to 0 and less than or equal to 0.005.
  • the preset value is greater than or equal to 0 and less than or equal to 0.003.
  • a gamma voltage output circuit includes at least one step-down gray-scale circuit and at least one normal gray-scale circuit, each of the step-down gray-scale circuits and each of the normal gray-scale circuits is It includes a plurality of series-connected resistors and wires connecting the resistors, and the ratio of the resistance value of the parasitic resistance of the wires of each of the step-down gray-scale circuits to the sum of the resistance values of the corresponding resistance values of the step-down gray-scale circuits is A, the ratio of the resistance value of the parasitic resistance of the trace of each normal grayscale circuit to the sum of the resistance value of the corresponding normal grayscale circuit is B, and the difference between the ratio A and the ratio B is absolute The value is the preset value.
  • the preset value is greater than or equal to 0 and less than or equal to 0.005.
  • the preset value is greater than or equal to 0 and less than or equal to 0.003.
  • a source driver includes a gamma voltage output circuit, the gamma voltage output circuit includes at least one dropped gray scale circuit and at least one normal gray scale circuit, each of the dropped gray scale circuits And each of the normal gray-scale circuits includes a plurality of resistors connected in series and a wiring connecting the resistors, and the resistance value of the parasitic resistance of the wiring of each of the gray-scale drop circuits corresponds to the gray-scale drop
  • the ratio of the sum of the resistances of the circuit is A
  • the ratio of the resistance of the parasitic resistance of the trace of each normal gray-scale circuit to the sum of the resistance of the corresponding normal gray-scale circuit is B
  • the ratio The absolute value of the difference between A and the ratio B is a preset value.
  • the preset value is greater than or equal to 0 and less than or equal to 0.005.
  • the preset value is greater than or equal to 0 and less than or equal to 0.003.
  • the present application provides a gamma voltage output circuit, a step-drop repair method, and a source driver.
  • the parasitic resistance of the trace corresponding to the step-drop gray-scale circuit By adjusting the parasitic resistance of the trace corresponding to the step-drop gray-scale circuit, the resistance of the trace parasitic resistance of the step-drop gray-scale circuit is adjusted.
  • the absolute value of the difference between the value and the sum of the resistance of the gray-scale circuit of the dropped gray-scale circuit and the ratio of the normal gray-scale circuit is a preset value, so that the source driver outputs the gamma voltage of each gray-scale to the display panel Smooth, to avoid the abnormality of display device screen drop caused by gamma voltage jump.
  • Figure 1 is a schematic diagram of the gamma curve before and after adjustment.
  • the display device is driven by the gate driver and the source driver respectively outputting row scan signals and data signals to the display panel.
  • Different data signal voltages are output to the pixel electrode, and the voltage difference between the voltage output by the pixel electrode and the voltage output by the common electrode causes different degrees of deflection of the liquid crystal, resulting in different brightness displays, and different gray scales appear when the liquid crystal display device displays .
  • the relationship curve between the data signal voltage and the gray scale is a gamma curve. Taking an 8bit display panel as an example, it can display 256 gray scales.
  • the gamma voltage output circuit in the source driver generates 256 different Gamma reference voltage.
  • the present application provides a method for repairing a step drop of a gamma voltage output circuit.
  • the gamma voltage output circuit includes at least one step-down gray-scale circuit and at least one normal gray-scale circuit.
  • Each step-down gray-scale circuit and each normal gray-scale circuit includes a plurality of resistors connected in series and a wiring connecting the plurality of resistors. .
  • the ratio of the resistance of the parasitic resistance of the trace of each gray-scale circuit to the sum of the resistance of the corresponding gray-scale circuit is A
  • the resistance of the parasitic resistance of each normal gray-scale circuit corresponds to normal
  • the ratio of the resistance of the gray-scale circuit is B
  • the repair method of the gamma voltage output circuit drop-out includes the following steps: adjust the resistance of the parasitic resistance of the trace of the drop-out gray-scale circuit to make the ratio A corresponding to the drop-out gray-scale circuit
  • the absolute value of the difference of the ratio B corresponding to the normal gray scale circuit is a predetermined value.
  • the sum of the resistance of the dropped gray-scale circuit and the resistance of the normal gray-scale circuit refers to the resistance of the multiple series resistors that make up the dropped gray-scale circuit and the normal gray-scale circuit. And, does not include the resistance value of the parasitic resistance of the trace connecting each resistance.
  • the inventor of the present application found that the main reason for the step drop of the gamma voltage output circuit is due to the ratio of the resistance of the parasitic resistance of the trace in the step drop gray scale circuit to the sum of the resistance value of the drop gray scale circuit. There is a jump in the normal gray scale circuit. Specifically, the gamma curve shows that the gamma curve is not smooth enough, and there is a large fluctuation in the gray scale corresponding to the dropped gray scale circuit.
  • the inventor of the present application adjusted the resistance of the parasitic resistance of the trace of the degraded grayscale circuit so that the resistance of the parasitic resistance of the trace of the degraded grayscale circuit and the resistance of the degraded grayscale circuit
  • the absolute value of the difference between the ratio of sum and the ratio corresponding to the normal gray-scale circuit is the preset value, so that the resistance value of the parasitic resistance of the trace corresponding to each gray-scale circuit and the sum of the resistance resistance of the gray-scale are balanced. Therefore, the gamma voltage corresponding to each gray scale finally output to the display panel is smooth.
  • Adjusting the resistance value of the parasitic resistance of the trace of the gray-scale circuit so that the absolute value of the difference between the ratio A and the ratio B is the preset value includes the following solutions:
  • the first solution adjust the length of the trace corresponding to the gray-scale circuit to make the absolute value of the difference between the ratio A and the ratio B a preset value. Specifically, for the traces corresponding to the gray-scale circuits with drop-out levels, while keeping the cross-section of the traces (including the width and thickness unchanged), control the length of the traces, including making the traces longer or shorter , So that the absolute value of the difference between the ratio A corresponding to any drop-level gray-scale circuit and the ratio B corresponding to any normal gray-scale circuit is the preset value.
  • the second solution adjust the width of the trace corresponding to the gray-scale circuit to make the absolute value of the difference between the ratio A and the ratio B a preset value.
  • the traces corresponding to the grayscale circuit of the drop-level grayscale keep the length and thickness of the trace unchanged, and control the width of the trace, including making the trace wider or narrower, so as to make any grayscale drop
  • the absolute value of the difference between the ratio A corresponding to the circuit and the ratio B corresponding to any normal gray-scale circuit is a preset value.
  • the third solution adjust the length and width of the trace corresponding to the gray-scale circuit to make the absolute value of the difference between the ratio A and the ratio B a preset value. Specifically, for the traces corresponding to the dropped grayscale circuits, keep the thickness of the traces constant, and control the width and length of the traces at the same time, so that the ratio A corresponding to any dropped grayscale circuit and any normal gray.
  • the absolute value of the difference of the ratio B corresponding to the first-order circuit is a preset value.
  • the preset value is greater than or equal to 0 and less than or equal to 0.005, so that the gamma curve corresponding to the gamma voltage output circuit is smooth and avoids the phenomenon of step drop during display of the display device.
  • the preset value is greater than or equal to 0 and less than or equal to 0.003, so that the gamma curve corresponding to the gamma voltage output circuit is smoother.
  • FIG. 1 it is a schematic diagram of the gamma curve before and after adjustment.
  • the gamma curve a Before the adjustment, the gamma curve a has small fluctuations in part of the gray scale between the 18th gray scale and the 36th gray scale, and large fluctuations in the part of the 200th gray scale to the 252nd gray scale.
  • the resistance value of the parasitic resistance of the trace corresponding to the gray-scale circuit so that the preset value is greater than or equal to 0 and not greater than 0.005, such as 0.004
  • the adjusted gamma curve b becomes smooth and does not appear obvious Fluctuations, so as to avoid the drop-out phenomenon when the display device displays.
  • the present application also provides a gamma voltage output circuit.
  • the gamma voltage output circuit includes at least one step-down gray-scale circuit and at least one normal gray-scale circuit.
  • Each step-down gray-scale circuit and each normal gray-scale circuit are both Including multiple resistors connected in series and traces connected to the resistors.
  • the ratio of the resistance of the parasitic resistance of the trace of each step-down gray-scale circuit to the sum of the resistance of the corresponding step-down gray-scale circuit is A
  • each normal gray The ratio of the resistance value of the parasitic resistance of the trace of the step circuit to the sum of the resistance value of the corresponding normal gray-scale circuit is B, and the absolute value of the difference between the ratio A and the ratio B is a preset value.
  • the preset value is greater than or equal to 0 and less than or equal to 0.005, so that the gamma curve of the gamma voltage output circuit is smooth and avoids the phenomenon of step drop during display of the display device. Further, the preset value is greater than or equal to 0 and less than or equal to 0.003 so that the gamma curve of the gamma voltage output circuit is smoother.
  • the gamma voltage output circuit of the present application controls the absolute value of the difference between the ratio of the resistance of the parasitic resistance of the trace parasitic resistance of the step-down gray-scale circuit to the sum of the resistance of the corresponding step-down gray-scale circuit and the ratio corresponding to the normal gray-scale circuit Is a preset value so that the ratio of the parasitic resistance of the trace resistance of each gray-scale resistance string of the gamma voltage output circuit to the sum of the resistance values of the corresponding gray-scale is balanced, so that the gray levels output by the gamma voltage output circuit
  • the first-order gamma voltage is smooth.
  • the application also provides a source driver, which includes the above-mentioned gamma voltage output circuit.
  • the source driver of the application controls the ratio of the resistance of the parasitic resistance of the trace of the dropped gray scale circuit to the sum of the resistance of the corresponding dropped gray scale circuit and the absolute value of the difference between the ratio corresponding to the normal gray scale circuit.
  • the gamma voltage is smooth to avoid the abnormality of the display device screen drop caused by the gamma voltage jump.
  • the problem of screen drop of the display device caused by chip shrinkage is solved, which can reduce the cost and meet the image quality requirements of the display device.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种伽马电压输出电路及其掉阶修复方法、源极驱动器，通过对掉阶灰阶电路对应的走线寄生电阻进行调整，使得掉阶灰阶电路的走线寄生电阻的阻值与对应掉阶灰阶电路的电阻阻值之和的比值和正常灰阶电路对应的比值的差值绝对值为预设值。

Description

伽马电压输出电路及其掉阶修复方法、源极驱动器 技术领域
本申请涉及显示技术领域，尤其涉及一种伽马电压输出电路及其掉阶修复方法、源极驱动器。
 背景技术
为了降低显示器的制造成本以提升市场竞争力，源极覆晶薄膜（S-COF， Source Chip On Film）制造厂配合显示器制造厂的需求进行裸露晶片（Die）封装的缩小以降低覆晶薄膜的成本以最终降低整个显示器的成本。
然而，通过减小晶片以实现晶片封装的缩小时，会导致晶片中伽马电压产生电路输出的伽马电压出现波动，最终导致显示装置显示时出现画面掉阶的现象会影响显示的整体画质，给产品的品质带来严重影响。
因此，有必要提出一种技术方案以解决由于伽马电压的波动导致显示装置显示时出现的画面掉阶问题。
 技术问题
本申请的目的在于提供一种伽马电压输出电路及其掉阶修复方法、源极驱动器，以解决伽马电压输出电路由于伽马电压波动而影响显示装置的显示效果的问题。
 技术解决方案
一种伽马电压输出电路掉阶修复方法，所述伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个所述掉阶灰阶电路和每个所述正常灰阶电路均包括多个串联的电阻以及连接所述电阻的走线，每个所述掉阶灰阶电路的走线寄生电阻的阻值与对应所述掉阶灰阶电路的电阻阻值之和的比值为A，每个所述正常灰阶电路的走线寄生电阻的阻值与对应所述正常灰阶电路的电阻阻值之和的比值为B，所述方法包括如下步骤：调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值。
在上述伽马电压输出电路掉阶修复方法中，所述调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值包括如下步骤：
通过调整所述掉阶灰阶电路对应的所述走线的长度以使所述比值A和所述比值B的差值绝对值为预设值。
在上述伽马电压输出电路掉阶修复方法中，所述调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值包括如下步骤：
通过调整所述掉阶灰阶电路对应的所述走线的宽度以使所述比值A和所述比值B的差值绝对值为预设值。
在上述伽马电压输出电路掉阶修复方法中，所述调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值包括如下步骤：
通过调整所述掉阶灰阶电路对应的所述走线的宽度和长度以使所述A和所述B的差值绝对值为预设值。
在上述伽马电压输出电路掉阶修复方法中，所述预设值为大于或等于0且小于或等于0.005。
在上述伽马电压输出电路掉阶修复方法中，所述预设值为大于或等于0且小于或等于0.003。
一种伽马电压输出电路，所述伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个所述掉阶灰阶电路和每个所述正常灰阶电路均包括多个串联的电阻以及连接所述电阻的走线，每个所述掉阶灰阶电路的走线寄生电阻的阻值与对应所述掉阶灰阶电路的电阻阻值之和的比值为A，每个所述正常灰阶电路的走线寄生电阻的阻值与对应所述正常灰阶电路的电阻阻值之和的比值为B，所述比值A和所述比值B的差值绝对值为预设值。
在上述伽马电压输出电路中，所述预设值为大于或等于0且小于或等于0.005。
在上述伽马电压输出电路中，所述预设值为大于或等于0且小于或等于0.003。
一种源极驱动器，所述源极驱动器包括伽马电压输出电路,所述伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个所述掉阶灰阶电路和每个所述正常灰阶电路均包括多个串联的电阻以及连接所述电阻的走线，每个所述掉阶灰阶电路的走线寄生电阻的阻值与对应所述掉阶灰阶电路的电阻阻值之和的比值为A，每个所述正常灰阶电路的走线寄生电阻的阻值与对应所述正常灰阶电路的电阻阻值之和的比值为B，所述比值A和所述比值B的差值绝对值为预设值。
在上述源极驱动器中，所述预设值为大于或等于0且小于或等于0.005。
在上述源极驱动器中，所述预设值为大于或等于0且小于或等于0.003。
 有益效果
本申请提供一种伽马电压输出电路及其掉阶修复方法、源极驱动器，通过对掉阶灰阶电路对应的走线寄生电阻进行调整，使得掉阶灰阶电路的走线寄生电阻的阻值与该掉阶灰阶电路的电阻阻值之和的比值和正常灰阶电路对应的比值的差值绝对值为预设值，从而使得源极驱动器输出到显示面板的各灰阶伽马电压顺滑，避免伽马电压跳变带来的显示装置画面掉阶的异常。
 附图说明
图1为调整前后的伽马曲线的示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
显示装置的驱动是通过栅极驱动器以及源极驱动器分别向显示面板输出行扫描信号以及数据信号实现的。不同的数据信号电压输出至像素电极，像素电极输出的电压与公共电极输出的电压之间的压差造成液晶不同程度的偏转从而造成不同亮度的显示，在液晶显示装置显示时呈现不同的灰阶。数据信号电压与灰阶之间的关系曲线为伽马曲线，以8bit显示面板为例，其可以显示256个灰阶，对应地，源极驱动器中的伽马电压输出电路会产生256个不同的伽马参考电压。
本申请提供一种伽马电压输出电路掉阶修复方法。伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个掉阶灰阶电路和每个正常灰阶电路均包括多个串联的电阻以及连接多个电阻的走线。每个掉阶灰阶电路的走线寄生电阻的阻值与对应掉阶灰阶电路的电阻阻值之和的比值为A，每个正常灰阶电路的走线寄生电阻的阻值与对应正常灰阶电路的电阻阻值的比值为B，伽马电压输出电路掉阶修复方法包括如下步骤：调整掉阶灰阶电路的走线寄生电阻的阻值以使得掉阶灰阶电路对应的比值A和正常灰阶电路对应的比值B的差值绝对值为预定值。
需要说明的是，掉阶灰阶电路的电阻阻值之和与正常灰阶电路的电阻阻值之和是指组成掉阶灰阶电路和正常灰阶电路的多个串接电阻的阻值之和，不包括连接各电阻的走线的寄生电阻的阻值。
本申请发明人经过大量的研究发现伽马电压输出电路掉阶的主要原因是由于掉阶灰阶电路中走线寄生电阻的阻值与该掉阶灰阶电路的电阻阻值之和的比值相对于正常灰阶电路出现跳变，具体在伽马曲线的表现为伽马曲线不够顺滑，在掉阶灰阶电路对应的灰阶处出现较大波动。
基于上述发现，本申请发明人通过调整掉阶灰阶电路的走线寄生电阻的阻值以使得掉阶灰阶电路的走线寄生电阻的阻值与该掉阶灰阶电路的电阻阻值之和的比值和正常灰阶电路对应的比值的差值绝对值为预设值，从而使得各灰阶电路对应的走线寄生电阻的阻值与该灰阶的电阻阻值之和的比值均衡，使得最终输出到显示面板的各灰阶对应的伽马电压顺滑。
调整掉阶灰阶电路的走线寄生电阻的阻值以使比值A和比值B的差值绝对值为预设值包括如下几种方案：
第一种方案：通过调整掉阶灰阶电路对应的走线的长度以使比值A和比值B的差值绝对值为预设值。具体地，对于掉阶灰阶电路对应的走线，保持走线的截面（包括宽度和厚度不变）不变的情况下，对走线的长度进行控制，包括使走线变长或变短，从而使得任一掉阶灰阶电路对应的比值A和任一正常灰阶电路对应的比值B的差值绝对值为预设值。
第二种方案：通过调整掉阶灰阶电路对应的走线的宽度以使比值A和比值B的差值绝对值为预设值。具体地，对于掉阶灰阶电路对应的走线，保持走线的长度和厚度不变，对走线的宽度进行控制，包括使走线变宽或变窄，从而使得任一掉阶灰阶电路对应的比值A和任一正常灰阶电路对应的比值B的差值绝对值为预设值。
第三种方案：通过调整掉阶灰阶电路对应的走线的长度和宽度以使比值A和比值B的差值绝对值为预设值。具体地，对于掉阶灰阶电路对应的走线，保持走线的厚度不变，对走线的宽度和长度同时控制，以使得任一掉阶灰阶电路对应的比值A和任一正常灰阶电路对应的比值B的差值绝对值为预设值。
预设值为大于或等于0且小于或等于0.005，使得伽马电压输出电路对应的伽马曲线顺滑，避免显示装置显示时出现掉阶的现象。
进一步地，预设值为大于或等于0且小于或等于0.003，使得伽马电压输出电路对应的伽马曲线更加顺滑。
如图1所示，其为调整前后的伽马曲线的示意图。调整前伽马曲线a在第18灰阶至第36灰阶之间的部分灰阶出现较小的波动，在第200灰阶至第252灰阶的部分灰阶出现较大的波动。通过调整掉阶灰阶电路对应的走线寄生电阻的阻值以使得预设值为大于或等于0且不大于0.005，例如0.004，使得调整后的伽马曲线b变得顺滑，未出现明显波动，从而避免显示装置显示时出现掉阶现象。
本申请还提供一种伽马电压输出电路，该伽马电压输出电路包括至少一掉阶灰阶电路以及至少一种正常灰阶电路，每个掉阶灰阶电路和每个正常灰阶电路均包括多个串联的电阻以及连接电阻的走线，每个掉阶灰阶电路的走线寄生电阻的阻值与对应掉阶灰阶电路的电阻阻值之和的比值为A，每个正常灰阶电路的走线寄生电阻的阻值与对应正常灰阶电路的电阻阻值之和的比值为B，比值A和比值B的差值绝对值为预设值。
预设值为大于或等于0且小于或等于0.005，使得伽马电压输出电路的伽马曲线顺滑，避免显示装置显示时出现掉阶的现象。进一步地，预设值为大于或等于0且小于或等于0.003使得伽马电压输出电路的伽马曲线更加顺滑。
本申请伽马电压输出电路通过控制掉阶灰阶电路的走线寄生电阻的阻值与对应掉阶灰阶电路的电阻阻值之和的比值和正常灰阶电路对应的比值的差值绝对值为预设值以使得伽马电压输出电路的各灰阶电阻串的走线寄生电阻阻值相对于对应灰阶的电阻阻值之和的比例均衡，从而使得伽马电压输出电路输出的各灰阶伽马电压顺滑。
本申请还提供一种源极驱动器，源极驱动器包括上述伽马电压输出电路。
本申请源极驱动器通过控制掉阶灰阶电路的走线寄生电阻的阻值与对应掉阶灰阶电路的电阻阻值之和的比值和正常灰阶电路对应的比值的差值绝对值为预设值以使得伽马电压输出电路的各灰阶电阻串的走线寄生电阻阻值相对于对应灰阶的电阻阻值之和的比例均衡，从而使得源极驱动器输出到显示面板的各灰阶伽马电压顺滑，避免伽马电压跳变带来的显示装置画面掉阶的异常。在不增加源极覆晶薄膜的芯片封装的前提下，解决由于芯片缩小而造成的显示装置的画面掉阶现象，既能兼顾降低成本，又能满足显示装置的画质需求。
以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (12)

  1. 一种伽马电压输出电路掉阶修复方法，其中，所述伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个所述掉阶灰阶电路和每个所述正常灰阶电路均包括多个串联的电阻以及连接所述电阻的走线，每个所述掉阶灰阶电路的走线寄生电阻的阻值与对应所述掉阶灰阶电路的电阻阻值之和的比值为A，每个所述正常灰阶电路的走线寄生电阻的阻值与对应所述正常灰阶电路的电阻阻值之和的比值为B，所述方法包括如下步骤：
    调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值。
  2. 根据权利要求1所述的伽马电压输出电路掉阶修复方法，其中，所述调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值包括如下步骤：
    通过调整所述掉阶灰阶电路对应的所述走线的长度以使所述比值A和所述比值B的差值绝对值为预设值。
  3. 根据权利要求1所述的伽马电压输出电路掉阶修复方法，其中，所述调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值包括如下步骤：
    通过调整所述掉阶灰阶电路对应的所述走线的宽度以使所述比值A和所述比值B的差值绝对值为预设值。
  4. 根据权利要求1所述的伽马电压输出电路掉阶修复方法，其中，所述调整所述掉阶灰阶电路的所述走线寄生电阻的阻值以使所述比值A和所述比值B的差值绝对值为预设值包括如下步骤：
    通过调整所述掉阶灰阶电路对应的所述走线的宽度和长度以使所述比值A和所述比值B的差值绝对值为预设值。
  5. 根据权利要求1所述的伽马电压输出电路掉阶修复方法，其中，所述预设值为大于或等于0且小于或等于0.005。
  6. 根据权利要求1所述的伽马电压输出电路掉阶修复方法，其中，所述预设值为大于或等于0且小于或等于0.003。
  7. 一种伽马电压输出电路，其中，所述伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个所述掉阶灰阶电路和每个所述正常灰阶电路均包括多个串联的电阻以及连接所述电阻的走线，每个所述掉阶灰阶电路的走线寄生电阻的阻值与对应所述掉阶灰阶电路的电阻阻值之和的比值为A，每个所述正常灰阶电路的走线寄生电阻的阻值与对应所述正常灰阶电路的电阻阻值之和的比值为B，所述比值A和所述比值B的差值绝对值为预设值。
  8. 根据权利要求7所述的伽马电压输出电路，其中，所述预设值为大于或等于0且小于或等于0.005。
  9. 根据权利要求7所述的伽马电压输出电路，其中，所述预设值为大于或等于0且小于或等于0.003。
  10. 一种源极驱动器，其中，所述源极驱动器包括伽马电压输出电路，所述伽马电压输出电路包括至少一掉阶灰阶电路以及至少一正常灰阶电路，每个所述掉阶灰阶电路和每个所述正常灰阶电路均包括多个串联的电阻以及连接所述电阻的走线，每个所述掉阶灰阶电路的走线寄生电阻的阻值与对应所述掉阶灰阶电路的电阻阻值之和的比值为A，每个所述正常灰阶电路的走线寄生电阻的阻值与对应所述正常灰阶电路的电阻阻值之和的比值为B，所述比值A和所述比值B的差值绝对值为预设值。
  11. 根据权利要求10所述的源极驱动器，其中，所述预设值为大于或等于0且小于或等于0.005。
  12. 根据权利要求10所述的源极驱动器，其中，所述预设值为大于或等于0且小于或等于0.003。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060274005A1 (en) * 2005-06-07 2006-12-07 Sharp Kabushiki Kaisha Gradation display reference voltage generating circuit and liquid crystal driving device
CN1937028A (zh) * 2005-09-22 2007-03-28 恩益禧电子股份有限公司 灰度等级电压产生电路
CN101110200A (zh) * 2006-07-20 2008-01-23 冲电气工业株式会社 驱动电路
JP2009188781A (ja) * 2008-02-07 2009-08-20 Seiko Epson Corp ラダー抵抗回路、基準電圧生成回路、ドライバ、電気光学装置及び電子機器
CN101542580A (zh) * 2006-11-29 2009-09-23 夏普株式会社 液晶显示装置、液晶显示装置驱动方法、液晶显示装置源极驱动器、以及液晶显示装置控制器
CN105590583A (zh) * 2016-03-28 2016-05-18 北京宏力尼科科技有限公司 灰阶电压产生电路、产生方法、驱动电路和显示装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3807321B2 (ja) * 2002-02-08 2006-08-09 セイコーエプソン株式会社 基準電圧発生回路、表示駆動回路、表示装置及び基準電圧発生方法
CN106782277A (zh) * 2017-02-15 2017-05-31 京东方科技集团股份有限公司 伽马电压产生电路、驱动电路及其显示装置
CN107452354B (zh) * 2017-09-22 2020-12-04 京东方科技集团股份有限公司 一种灰阶控制电路、显示驱动电路及显示装置
CN108735173B (zh) * 2018-05-25 2020-12-29 昆山龙腾光电股份有限公司 伽马电压产生装置和液晶显示装置
CN108597447A (zh) * 2018-07-09 2018-09-28 武汉华星光电半导体显示技术有限公司 一种显示面板灰阶电压的调试方法及装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060274005A1 (en) * 2005-06-07 2006-12-07 Sharp Kabushiki Kaisha Gradation display reference voltage generating circuit and liquid crystal driving device
CN1937028A (zh) * 2005-09-22 2007-03-28 恩益禧电子股份有限公司 灰度等级电压产生电路
CN101110200A (zh) * 2006-07-20 2008-01-23 冲电气工业株式会社 驱动电路
CN101542580A (zh) * 2006-11-29 2009-09-23 夏普株式会社 液晶显示装置、液晶显示装置驱动方法、液晶显示装置源极驱动器、以及液晶显示装置控制器
JP2009188781A (ja) * 2008-02-07 2009-08-20 Seiko Epson Corp ラダー抵抗回路、基準電圧生成回路、ドライバ、電気光学装置及び電子機器
CN105590583A (zh) * 2016-03-28 2016-05-18 北京宏力尼科科技有限公司 灰阶电压产生电路、产生方法、驱动电路和显示装置

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