WO2020019389A1 - 一种液晶显示面板的残像消除方法 - Google Patents
一种液晶显示面板的残像消除方法 Download PDFInfo
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- WO2020019389A1 WO2020019389A1 PCT/CN2018/101664 CN2018101664W WO2020019389A1 WO 2020019389 A1 WO2020019389 A1 WO 2020019389A1 CN 2018101664 W CN2018101664 W CN 2018101664W WO 2020019389 A1 WO2020019389 A1 WO 2020019389A1
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- liquid crystal
- crystal display
- display panel
- afterimage
- common voltage
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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
- G09G3/006—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
- 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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
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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
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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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
- G09G2320/0257—Reduction of after-image effects
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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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Definitions
- the liquid crystal display panel uses a pixel electrode and a common electrode to apply a driving voltage difference to the liquid crystal layer sandwiched therebetween, thereby rotating the liquid crystal molecules of the liquid crystal layer and controlling the amount of light to display a picture.
- the driving voltage difference is relative to the potential (common voltage) applied to the common electrode. Therefore, driving a liquid crystal display requires a stable common voltage, but due to the capacitive coupling inside the liquid crystal display panel, the common voltage offset phenomenon often occurs, making the common After the voltage is increased or decreased, afterimages, abnormal grayscale display, and crosstalk appear, which affect the display effect.
- the main cause of the capacitive coupling inside the liquid crystal display panel is the difference in liquid crystal capacitance caused by the deflection angle of the liquid crystal.
- the prior art generally adopts an adjustment of an input voltage.
- the current voltage adjustment method is to adjust from high gray level to low gray level in turn.
- the adjustment method is to fix the reference common voltage and the standard gamma curve unchanged, and then translate the reference voltage bound by the gamma correction unit, and move the amplitude. It is necessary to test step by step to the left or right, until after the checkerboard is finished, there are no afterimages or slight afterimages under this grayscale; after adjusting a grayscale, fix the reference voltage of this grayscale. Then adjust the next grayscale.
- this method can improve the afterimage defect to a certain extent, it is time-consuming and consumable. Generally, it takes several days and dozens of modules to complete the adjustment.
- the reference voltage corresponding to each grayscale is adjusted in turn from high grayscale to low grayscale, further extending the time required to eliminate afterimages, and further consuming the afterimage elimination facilities.
- Required optical module In the existing afterimage removal method of a liquid crystal display panel, the reference voltage corresponding to each grayscale is adjusted in turn from high grayscale to low grayscale, further extending the time required to eliminate afterimages, and further consuming the afterimage elimination facilities. Required optical module.
- the invention provides a method for eliminating afterimages of a liquid crystal display panel, including:
- the positive and negative voltages of the first reference voltage are symmetrical about the first common voltage as an axis of symmetry.
- the positive and negative voltages of the second reference voltage are symmetrical about the reference common voltage as an axis of symmetry.
- a translation amplitude of the second reference voltage and the first reference voltage is the same as a translation amplitude of the first common voltage and the reference common voltage.
- a translation direction of the second reference voltage and the first reference voltage is opposite to a translation direction of the first common voltage and the reference common voltage.
- the S10 further includes:
- the S101 further includes:
- the afterimage detection picture is a black and white checkerboard pattern or a black and white stripe pattern.
- the S40 further includes:
- the invention provides a method for eliminating afterimages of a liquid crystal display panel, including:
- the positive and negative voltages of the first reference voltage are symmetrical about the first common voltage as an axis of symmetry.
- the positive and negative voltages of the second reference voltage are symmetrical about the reference common voltage as an axis of symmetry.
- a translation amplitude of the second reference voltage and the first reference voltage is the same as a translation amplitude of the first common voltage and the reference common voltage.
- a translation direction of the second reference voltage and the first reference voltage is opposite to a translation direction of the first common voltage and the reference common voltage.
- the S10 further includes:
- the S101 further includes:
- the afterimage detection picture is a black and white checkerboard pattern or a black and white stripe pattern.
- the S40 further includes:
- An afterimage removal method for a liquid crystal display panel provided by the present invention maintains a reference common voltage and performs grayscale adjustment by moving a reference voltage.
- the implementation process is simple, further reducing the time required to remove afterimages, and more The number of optical modules required to eliminate afterimages is further reduced.
- FIG. 1 is a flowchart of an afterimage removal method of a liquid crystal display panel of the present invention.
- FIG. 2 is a schematic diagram of an embodiment of an afterimage removal method of a liquid crystal display panel of the present invention.
- the present invention is directed to an afterimage erasing method of an existing liquid crystal display panel. Since the reference voltage corresponding to each grayscale is adjusted in turn from high grayscale to low grayscale, the time required to eliminate the afterimage is further prolonged, which further consumes The technical problem of the optical module required to eliminate the afterimage, this embodiment can solve this defect.
- the present invention provides a process for removing an afterimage of a liquid crystal display panel.
- the method includes:
- the reference common voltage output by the common voltage generating circuit is shifted to form a first common voltage, so that the afterimage of the specific grayscale picture on the liquid crystal display panel disappears.
- the S10 further includes:
- the parameters of the LCD panel using conventional gamma debugging methods, that is, adjust the reference voltage bound to the gamma correction unit of the LCD panel to make it symmetrical to the common voltage, that is, the gamma correction unit.
- the absolute value of the difference between the positive and negative frame voltages of the bound reference voltage and the common voltage may be equal or approximately equal. For example, if the common voltage is 4.5V, the positive and negative frames of the reference voltage bound to the gamma correction unit are set to 7V and 2V, respectively.
- the display brightness of the liquid crystal display panel must be adjusted so that the flicker of the liquid crystal display panel can be minimized.
- An external measuring instrument can be connected to detect the flicker of the LCD panel. When the minimum flicker is detected, stop the adjustment and record the current parameter values.
- the liquid crystal display panel is maintained in a state of minimum flicker, and a process of detecting an afterimage is started.
- the liquid crystal display panel is used to display an afterimage detection screen.
- the afterimage detection screen is a black-and-white checkerboard screen.
- the afterimage detection screen may also be a black-and-white stripe screen or other black-and-white blocks.
- the cause of the afterimage is mainly due to the coupling effect between the in-plane capacitors, which makes the reference voltage bound to the gamma correction unit of the LCD panel an asymmetrical setting with respect to the common voltage, and the lamp will be lit at this voltage for a long time. As a result, the liquid crystal appears polarized, which causes afterimages.
- the reference common voltage of the liquid crystal display panel is symmetrical with respect to the first reference voltage bound by the gamma correction unit of the liquid crystal display panel, but is actually applied to the liquid crystal due to the in-plane coupling effect of the liquid crystal display panel.
- the voltage across the two terminals is shifted from the first reference voltage to form a second reference voltage.
- the reference common voltage output by the common voltage generating circuit is shifted to form a first common voltage, and the first common voltage is symmetrical with respect to the second reference voltage after coupling, and then the afterimage will disappear and Record the adjustment direction and amplitude of the reference common voltage.
- the value range of the specific gray level of the first common voltage is greater than or equal to 48 gray levels and less than or equal to 127 gray levels.
- S20 Keep the reference common voltage unchanged, and detect an afterimage that appears on the specific grayscale picture.
- the S20 further includes:
- adjusting the reference common voltage output by the common voltage generating circuit can only make the afterimage of the liquid crystal display panel located on a specific gray scale screen disappear; at this time, the The reference common voltage does not change, and the positive and negative voltages of the first reference voltage bound by the gamma correction unit of the liquid crystal display panel are not symmetrical with the reference common voltage, and a reappearance on the specific grayscale screen is detected. Afterimage.
- the S30 further includes:
- a first reference voltage bound by a gamma correction unit of the liquid crystal display panel is adjusted to obtain the second reference voltage.
- a translation amplitude of the second reference voltage and the first reference voltage is the same as a translation amplitude of the first common voltage and the reference common voltage;
- a translation direction of the second reference voltage and the first reference voltage Opposite to the translation direction of the first common voltage and the reference common voltage; at this time, the positive and negative voltages of the second reference voltage are symmetrical about the reference common voltage as an axis of symmetry, and the liquid crystal display panel is converted to The afterimage disappears when describing a specific grayscale picture.
- the S40 further includes:
- the positive and negative voltages of the reference voltage corresponding to the grayscale picture are symmetrical about the reference common voltage as an axis of symmetry, and the afterimage of the liquid crystal display panel is eventually eliminated.
- FIG. 2 is a schematic diagram of an embodiment of an afterimage removal method for a liquid crystal display panel according to the present invention.
- the reference common voltage 201 output by the common voltage generating circuit is first shifted to the left by ⁇ V to form a first common voltage 202, so that the afterimage of the specific grayscale picture on the liquid crystal display panel disappears.
- the positive and negative voltages of the first reference voltage 204 bound by the gamma correction unit of the liquid crystal display panel are symmetrical about the first common voltage 202 as an axis of symmetry, and the liquid crystal display panel is converted into the specific gray.
- the afterimage disappears in the step screen.
- the positive and negative voltages of the first reference voltage 204 bound by the gamma correction unit of the liquid crystal display panel are not symmetrical about the first common voltage 202 as an axis of symmetry, so The afterimage reappears when the liquid crystal display panel is converted into the specific grayscale picture.
- the first reference voltage bound to the gamma correction unit of the liquid crystal display panel is shifted to the right by ⁇ V to obtain the second reference voltage 203.
- the positive and negative voltages of the second reference voltage 203 are
- the reference common voltage 201 is symmetric and axisymmetric, and the afterimage disappears when the liquid crystal display panel is converted into the specific grayscale picture.
- the present invention proposes a new improvement method based on the previous technology.
- the present invention is specifically directed to a specific grayscale picture of customer concern. First, checkerboard lighting is performed on the afterimage test picture, and then the specific grayscale picture is switched. The reference common voltage at this time is adjusted until the afterimage disappears. Adjusting the direction and amplitude of the common voltage, and then fixing the reference common voltage to shift the reference voltage bound to the gamma correction unit of the liquid crystal display panel, and the translation amplitude and direction of the reference voltage is adjusted with the reference common unit The method is consistent to improve the afterimage defect.
- the beneficial effects of the present invention are: an afterimage removal method for a liquid crystal display panel provided by the present invention, keeping a reference common voltage unchanged, and performing grayscale adjustment by moving the reference voltage, the implementation process is simple, and the elimination is further reduced The time required for afterimages further reduces the number of optical modules required to eliminate afterimages.
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Abstract
一种液晶显示面板的残像消除方法，包括：平移公共电压生成电路输出的基准公共电压（201）使残像消失；保持基准公共电压（201）不变，调整液晶显示面板的伽马校正单元所绑定的第一参考电压（204），使残像消失；依次完成剩余灰阶的调整。
Description
本发明涉及液晶显示面板领域，尤其涉及一种液晶显示面板的残像消除方法。
液晶显示面板因其重量轻、体积小、耗电少以及辐射低等独特性优点被广泛应用在电子设备上，如显示器、电视、手机、电子相框等。
液晶显示面板利用像素电极、公共电极对夹在其间的液晶层施加一驱动电压差，从而使液晶层的液晶分子发生旋转，控制光线的通过量以显示画面。驱动电压差是相对加在公共电极的电位(公共电压)而言的，因此，驱动液晶显示需要稳定的公共电压，但因液晶显示面板内部的电容耦合，经常产生公共电压偏移现象，使公共电压升高或降低，结果出现残像、显示灰阶异常以及串音等现象，影响显示效果。导致液晶显示面板内部的电容耦合的原因主要是液晶的偏转角度导致的液晶电容不同。
为解决上述问题，现有技术一般采用对输入电压进行调整。现有的调整电压的方式为从高灰阶到低灰阶依次进行调整，调整手法为固定基准公共电压以及标准伽马曲线不变，然后平移伽马校正单元所绑定的参考电压，移动幅度以及左移还是右移均要一步一步进行试探，直到点完棋盘格以后此灰阶下不再有残影或者残影较轻微为准；调整完一个灰阶后再固定此灰阶的参考电压然后调整下一灰阶。此方法虽然可以在一定程度上改善残像不良，但是耗时且耗材，一般调整完都要几天时间且消耗几十片模组。
综上所述，现有的液晶显示面板的残像消除方法，由于从高灰阶到低灰阶依次对每一灰阶对应的参考电压进行调整，进一步延长了消除残像所需的时间，更进一步消耗了消除残像所需的光学模组。
现有的液晶显示面板的残像消除方法，从高灰阶到低灰阶会依次对每一灰阶对应的参考电压进行调整，进一步延长了消除残像所需的时间，更进一步消耗了消除残像所需的光学模组。
本发明提供一种液晶显示面板的残像消除方法，包括：
S10，平移公共电压生成电路输出的基准公共电压，形成第一公共电压，所述第一公共电压的特定灰阶的取值范围为大于或等于48灰阶而小于或等于127灰阶，使处于液晶显示面板上的特定灰阶画面的残像消失；
S20，保持所述基准公共电压不变，检测出所述特定灰阶画面上出现的残像；
S30，调整所述液晶显示面板的伽马校正单元所绑定的第一参考电压，得到所述第二参考电压，使所述残像消失；
S40，依次调整剩余灰阶画面对应的参考电压，使所述液晶显示面板的残像消除。
根据本发明一优选实施例，所述第一参考电压的正负电压以所述第一公共电压为对称轴对称。
根据本发明一优选实施例，所述第二参考电压的正负电压以所述基准公共电压为对称轴对称。
根据本发明一优选实施例，所述第二参考电压与所述第一参考电压的平移幅度与所述第一公共电压与所述基准公共电压的平移幅度相同。
根据本发明一优选实施例，所述第二参考电压与所述第一参考电压的平移方向与所述第一公共电压与所述基准公共电压的平移方向相反。
根据本发明一优选实施例，所述S10还包括：
S101，对所述液晶显示面板进行调试，使所述液晶显示面板显示的闪烁度达到最小；
S102，控制液晶显示面板的显示画面在残像检测画面与特定灰阶画面之间进行切换，检测出所述特定灰阶画面上出现的残像。
根据本发明一优选实施例，所述S101还包括：
S1011，通过调整所述第一参考电压相对于所述基准公共电压的对称性以及所述液晶显示面板的显示亮度，使所述液晶显示面板显示的闪烁度达到最小。
根据本发明一优选实施例，所述残像检测画面为黑白棋盘图案或黑白条纹图案。
根据本发明一优选实施例，所述S40还包括：
S401，控制所述液晶显示面板的显示画面以预设的间隔时间在残像检测画面与灰阶画面之间进行切换；
S402，由高灰阶画面到低灰阶画面的顺序依次调整对应灰阶画面的参考电压，调整完一个灰阶画面后再固定此灰阶的参考电压然后调整下一灰阶，最终使所述液晶显示面板的残像消除。
本发明提供一种液晶显示面板的残像消除方法，包括：
S10，平移公共电压生成电路输出的基准公共电压，形成第一公共电压，使处于液晶显示面板上的特定灰阶画面的残像消失；
S20，保持所述基准公共电压不变，检测出所述特定灰阶画面上出现的残像；
S30，调整所述液晶显示面板的伽马校正单元所绑定的第一参考电压，得到所述第二参考电压，使所述残像消失；
S40，依次调整剩余灰阶画面对应的参考电压，使所述液晶显示面板的残像消除。
根据本发明一优选实施例，所述第一参考电压的正负电压以所述第一公共电压为对称轴对称。
根据本发明一优选实施例，所述第二参考电压的正负电压以所述基准公共电压为对称轴对称。
根据本发明一优选实施例，所述第二参考电压与所述第一参考电压的平移幅度与所述第一公共电压与所述基准公共电压的平移幅度相同。
根据本发明一优选实施例，所述第二参考电压与所述第一参考电压的平移方向与所述第一公共电压与所述基准公共电压的平移方向相反。
根据本发明一优选实施例，所述S10还包括：
S101，对所述液晶显示面板进行调试，使所述液晶显示面板显示的闪烁度达到最小；
S102，控制液晶显示面板的显示画面在残像检测画面与特定灰阶画面之间进行切换，检测出所述特定灰阶画面上出现的残像。
根据本发明一优选实施例，所述S101还包括：
S1011，通过调整所述第一参考电压相对于所述基准公共电压的对称性以及所述液晶显示面板的显示亮度，使所述液晶显示面板显示的闪烁度达到最小。
根据本发明一优选实施例，所述残像检测画面为黑白棋盘图案或黑白条纹图案。
根据本发明一优选实施例，所述S40还包括：
S401，控制所述液晶显示面板的显示画面以预设的间隔时间在残像检测画面与灰阶画面之间进行切换；
S402，由高灰阶画面到低灰阶画面的顺序依次调整对应灰阶画面的参考电压，调整完一个灰阶画面后再固定此灰阶的参考电压然后调整下一灰阶，最终使所述液晶显示面板的残像消除。
本发明所提供的一种液晶显示面板的残像消除方法，将基准公共电压保持不变，通过移动参考电压的方式来进行灰阶调整，实现过程简单，进一步降低了消除残像所需的时间，更进一步减少了消除残像所需的光学模组。
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明液晶显示面板的残像消除方法流程图。
图2是本发明液晶显示面板的残像消除方法的一实施例示意图。
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
本发明针对现有的液晶显示面板的残像消除方法，由于从高灰阶到低灰阶依次对每一灰阶对应的参考电压进行调整，进一步延长了消除残像所需的时间，更进一步消耗了消除残像所需的光学模组的技术问题，本实施例能够解决该缺陷。
如图1所示，本发明提供一液晶显示面板的残像消除方法流程，所述方法包括：
S10，平移公共电压生成电路输出的基准公共电压，形成第一公共电压，使处于液晶显示面板上的特定灰阶画面的残像消失。
具体的，所述S10还包括：
首先采用常规的伽马调试手法对液晶显示面板的参数进行调节，即调整液晶显示面板的伽马校正单元所绑定的参考电压，使其相对于公共电压的对称设置，即伽马校正单元所绑定的参考电压的正负帧电压与公共电压的差值的绝对值相等或者近似相等即可。例如，公共电压为4.5V，伽马校正单元所绑定的参考电压的正负帧就分别设置为7V和2V。同时还要调节液晶显示面板的显示亮度，使得液晶显示面板显示的闪烁度达到最小。可以外接一个测量仪器，检测液晶显示面板的闪烁度，在检测到目前的闪烁度最小时，停止调节，并记录下当前的各项参数值。
然后将液晶显示面板维持在闪烁度最小的状态，开始残像检测的流程。首先让液晶显示面板显示残像检测画面，在本实施例中残像检测画面为黑白棋盘格画面，在其他实施例中，残像检测画面还可以是黑白条纹画面，或者其他黑白色块相间的画面。显示黑白棋盘格画面一分钟后，将显示画面切换为特定的灰阶画面，例如L128的灰阶画面，观察L128的灰阶画面上出现的残像。导致残像出现的原因主要是由于面内电容之间的耦合作用，使液晶显示面板的伽马校正单元所绑定的参考电压相对于公共电压的不对称设置，长时间处于此电压下点灯就会导致液晶出现极化，从而导致残影出现。
出现残像前，所述液晶显示面板的基准公共电压相对于所述液晶显示面板的伽马校正单元所绑定的第一参考电压对称，但是实际由于所述液晶显示面板面内耦合作用施加于液晶两端的电压发生了相对所述第一参考电压发生偏移，形成第二参考电压。此时，平移公共电压生成电路输出的基准公共电压，形成第一公共电压，所述第一公共电压相对于耦合后的所述第二参考电压即是对称的，则此时残像会消失，并记录所述基准公共电压的调整方向和幅度。
优选地，所述第一公共电压的特定灰阶的取值范围为大于或等于48灰阶而小于或等于127灰阶。
S20，保持所述基准公共电压不变，检测出所述特定灰阶画面上出现的残像。
具体的，所述S20还包括：
由于公共电压生成电路为整面的且不可随灰阶而动，所以调整公共电压生成电路输出的基准公共电压，只能使所述液晶显示面板位于特定灰阶画面的残像消失；此时，保持所述基准公共电压不变，所述液晶显示面板的伽马校正单元所绑定的第一参考电压的正负电压不以所述基准公共电压对称，检测出所述特定灰阶画面上重新出现残像。
S30，调整所述液晶显示面板的伽马校正单元所绑定的第一参考电压，得到所述第二参考电压，使所述残像消失。
具体的，所述S30还包括：
在所述液晶显示面板转换为所述特定灰阶画面时，调整所述液晶显示面板的伽马校正单元所绑定的第一参考电压，得到所述第二参考电压。所述第二参考电压与所述第一参考电压的平移幅度与所述第一公共电压与所述基准公共电压的平移幅度相同；所述第二参考电压与所述第一参考电压的平移方向与所述第一公共电压与所述基准公共电压的平移方向相反；此时，所述第二参考电压的正负电压以所述基准公共电压为对称轴对称，所述液晶显示面板转换为所述特定灰阶画面时的残像消失。
S40，依次调整剩余灰阶画面对应的参考电压，使所述液晶显示面板的残像消除。
具体的，所述S40还包括：
S401，控制所述液晶显示面板的显示画面以预设的间隔时间在残像检测画面与灰阶画面之间进行切换；
S402，由高灰阶画面到低灰阶画面的顺序依次调整对应灰阶画面的参考电压，调整完一个灰阶画面后再固定此灰阶的参考电压然后调整下一灰阶，每一所述灰阶画面对应的参考电压的正负电压以所述基准公共电压为对称轴对称，最终使所述液晶显示面板的残像消除。
图2为本发明液晶显示面板的残像消除方法的一实施例示意图。
其中，首先将公共电压生成电路输出的基准公共电压201向左平移ΔV，形成第一公共电压202，使处于液晶显示面板上的特定灰阶画面的残像消失。此时，所述液晶显示面板的伽马校正单元所绑定的第一参考电压204的正负电压以所述第一公共电压202为对称轴对称，所述液晶显示面板转换为所述特定灰阶画面时的残像消失。
然后，保持所述基准公共电压201不变，所述液晶显示面板的伽马校正单元所绑定的第一参考电压204的正负电压不以所述第一公共电压202为对称轴对称，所述液晶显示面板转换为所述特定灰阶画面时重新出现残像。
之后，将所述液晶显示面板的伽马校正单元所绑定的第一参考电压向右平移ΔV，得到所述第二参考电压203，此时，所述第二参考电压203的正负电压以所述基准公共电压201为对称轴对称，所述液晶显示面板转换为所述特定灰阶画面时的残像消失。
本发明在之前技术的基础上提出了一种新的改善方法。本发明具体为针对客户关注的特定灰阶画面，先在残像测试画面进行棋盘格点灯，然后切换为所述特定灰阶画面，调整此时的基准公共电压直到残影消失，记住所述基准公共电压的调整方向和幅度，然后固定所述基准公共电压不变将所述液晶显示面板的伽马校正单元所绑定的参考电压进行平移，其平移幅度和方向与所述基准公共单元的调整方式保持一致，从而改善残像不良现象。
本发明的有益效果为：本发明所提供的一种液晶显示面板的残像消除方法，将基准公共电压保持不变，通过移动参考电压的方式来进行灰阶调整，实现过程简单，进一步降低了消除残像所需的时间，更进一步减少了消除残像所需的光学模组。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
Claims (18)
- 一种液晶显示面板的残像消除方法，其中，包括：S10，平移公共电压生成电路输出的基准公共电压，形成第一公共电压，所述第一公共电压的特定灰阶的取值范围为大于或等于48灰阶而小于或等于127灰阶，使处于液晶显示面板上的特定灰阶画面的残像消失；S20，保持所述基准公共电压不变，检测出所述特定灰阶画面上出现的残像；S30，调整所述液晶显示面板的伽马校正单元所绑定的第一参考电压，得到所述第二参考电压，使所述残像消失；S40，依次调整剩余灰阶画面对应的参考电压，使所述液晶显示面板的残像消除。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述第一参考电压的正负电压以所述第一公共电压为对称轴对称。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述第二参考电压的正负电压以所述基准公共电压为对称轴对称。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述第二参考电压与所述第一参考电压的平移幅度与所述第一公共电压与所述基准公共电压的平移幅度相同。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述第二参考电压与所述第一参考电压的平移方向与所述第一公共电压与所述基准公共电压的平移方向相反。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述S10还包括：S101，对所述液晶显示面板进行调试，使所述液晶显示面板显示的闪烁度达到最小；S102，控制液晶显示面板的显示画面在残像检测画面与特定灰阶画面之间进行切换，检测出所述特定灰阶画面上出现的残像。
- 根据权利要求6所述的液晶显示面板的残像消除方法，其中，所述S101还包括：S1011，通过调整所述第一参考电压相对于所述基准公共电压的对称性以及所述液晶显示面板的显示亮度，使所述液晶显示面板显示的闪烁度达到最小。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述残像检测画面为黑白棋盘图案或黑白条纹图案。
- 根据权利要求1所述的液晶显示面板的残像消除方法，其中，所述S40还包括：S401，控制所述液晶显示面板的显示画面以预设的间隔时间在残像检测画面与灰阶画面之间进行切换；S402，由高灰阶画面到低灰阶画面的顺序依次调整对应灰阶画面的参考电压，调整完一个灰阶画面后再固定此灰阶的参考电压然后调整下一灰阶，最终使所述液晶显示面板的残像消除。
- 一种液晶显示面板的残像消除方法，其中，包括：S10，平移公共电压生成电路输出的基准公共电压，形成第一公共电压，使处于液晶显示面板上的特定灰阶画面的残像消失；S20，保持所述基准公共电压不变，检测出所述特定灰阶画面上出现的残像；S30，调整所述液晶显示面板的伽马校正单元所绑定的第一参考电压，得到所述第二参考电压，使所述残像消失；S40，依次调整剩余灰阶画面对应的参考电压，使所述液晶显示面板的残像消除。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述第一参考电压的正负电压以所述第一公共电压为对称轴对称。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述第二参考电压的正负电压以所述基准公共电压为对称轴对称。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述第二参考电压与所述第一参考电压的平移幅度与所述第一公共电压与所述基准公共电压的平移幅度相同。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述第二参考电压与所述第一参考电压的平移方向与所述第一公共电压与所述基准公共电压的平移方向相反。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述S10还包括：S101，对所述液晶显示面板进行调试，使所述液晶显示面板显示的闪烁度达到最小；S102，控制液晶显示面板的显示画面在残像检测画面与特定灰阶画面之间进行切换，检测出所述特定灰阶画面上出现的残像。
- 根据权利要求15所述的液晶显示面板的残像消除方法，其中，所述S101还包括：S1011，通过调整所述第一参考电压相对于所述基准公共电压的对称性以及所述液晶显示面板的显示亮度，使所述液晶显示面板显示的闪烁度达到最小。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述残像检测画面为黑白棋盘图案或黑白条纹图案。
- 根据权利要求10所述的液晶显示面板的残像消除方法，其中，所述S40还包括：S401，控制所述液晶显示面板的显示画面以预设的间隔时间在残像检测画面与灰阶画面之间进行切换；S402，由高灰阶画面到低灰阶画面的顺序依次调整对应灰阶画面的参考电压，调整完一个灰阶画面后再固定此灰阶的参考电压然后调整下一灰阶，最终使所述液晶显示面板的残像消除。
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| CN108877717A (zh) | 2018-11-23 |
| US20210225318A1 (en) | 2021-07-22 |
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