WO2014079114A1 - 液晶面板驱动系统中的切角电路及均齐度调整系统、方法 - Google Patents

液晶面板驱动系统中的切角电路及均齐度调整系统、方法 Download PDF

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Publication number
WO2014079114A1
WO2014079114A1 PCT/CN2012/086090 CN2012086090W WO2014079114A1 WO 2014079114 A1 WO2014079114 A1 WO 2014079114A1 CN 2012086090 W CN2012086090 W CN 2012086090W WO 2014079114 A1 WO2014079114 A1 WO 2014079114A1
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Prior art keywords
corner
liquid crystal
crystal panel
resistor
control signal
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PCT/CN2012/086090
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English (en)
French (fr)
Inventor
陈胤宏
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深圳市华星光电技术有限公司
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Priority to US13/807,737 priority Critical patent/US9135879B2/en
Publication of WO2014079114A1 publication Critical patent/WO2014079114A1/zh

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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
    • G09G3/3674—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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/0693—Calibration of display systems
    • 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

Definitions

  • the present invention relates to the field of manufacturing liquid crystal display devices, and more particularly to a chamfering circuit and a uniformity adjustment system and method in a liquid crystal panel driving system.
  • a chamfering circuit is added to the driving system of the LCD, and the waveform of the driving voltage is adjusted by the chamfering circuit to make the waveform have a certain slope (the slope here refers to the angle between the voltage waveform and the horizontal line, where 0 Degrees and 90 degrees are considered to be horizontal or vertical, and are not considered to have a slope, and then output to the scan line of the LCD panel.
  • the various components of the chamfer circuit are mounted on the control panel of the LCD drive system.
  • the chamfering circuit has been widely used on every model.
  • the components of the chamfering circuit are mounted on the control panel of the LCD driver system.
  • the chamfering circuit includes a discharge resistor, and the output voltage VGH voltage waveform is changed by the chamfering function control signal control discharge resistor, as shown in FIG. 2, the liquid crystal panel VG driving according to the VGH signal is generated.
  • the voltage waveform of the signal (the scanning waveform of the scanning voltage of the scanning line of the liquid crystal panel) forms a chamfer.
  • the chamfer slope of the driving voltage waveform needs to be realized by changing the discharge resistance in the chamfer circuit. Therefore, the uniformity can only be applied to the mass production LCD panel with the adjustment result of one LCD panel. The consequence is that the mass production LCD panel is The degree of uniformity does not allow the LCD panel to achieve the best results.
  • the technical problem to be solved by the present invention is to provide a chamfering circuit and a uniformity adjustment system and method in a liquid crystal panel driving system capable of adjusting the uniformity of a liquid crystal panel.
  • the object of the present invention is achieved by the following technical solutions: A chamfering circuit in a liquid crystal panel driving system, comprising a discharge resistor, wherein the discharge resistor is an adjustable resistor with adjustable resistance.
  • the adjustable resistor is a digital resistor.
  • the digital resistance adjustment method compares the single.
  • the chamfering circuit is further provided with a memory module for storing a preset value of the digital control signal; the memory module is connected to the digital resistor. This makes it unnecessary to wait for the digital control signal when the LCD panel's drive system is activated.
  • a liquid crystal panel uniformity adjustment system comprising: a chamfering circuit chip, an adjustable resistor with an adjustable resistance value; a chamfering control fixture for feeding a chamfering circuit chip to control a chamfering function of a chamfering timing a control signal and a resistance control signal for controlling the resistance of the adjustable resistor; a panel brightness measuring instrument for measuring a difference in brightness of the partition of the liquid crystal panel, and feeding back the difference information of the brightness of the partition to the chamfer control jig; The angle control fixture adjusts the resistance control signal according to the difference information of the partition brightness, and sends the adjusted resistance control signal to the chamfer circuit.
  • the adjustable resistor is a digital resistor.
  • the digital resistance adjustment compares the single.
  • the adjustable resistor is disposed outside the chip of the chamfering circuit. Avoid resistance heat to affect the chamfer
  • the chamfering circuit chip is further provided with a memory module for storing the digital control signal preset value input by the chamfer control jig; and the memory module is connected to the digital resistor. This makes it possible to wait for the digital control signal when the drive system of the liquid crystal panel is activated.
  • a liquid crystal panel uniformity adjustment method includes the following steps: A: measuring a difference in brightness of a liquid crystal panel partition, B: adjusting a discharge resistance value of a chamfer circuit in the liquid crystal panel driving system according to a difference in brightness of the liquid crystal panel to change the discharge Slope.
  • step B after changing the discharge slope, then repeat steps A and B until the partition luminance difference is less than or equal to a preset threshold. This results in a better brightness difference value, so that the optimum discharge resistance value can be determined.
  • the adjustable resistance in the chamfering circuit is a digital resistor
  • the chamfering circuit further includes a memory module, and the resistance control signal corresponding to the partition brightness difference value is recorded into the memory module, and is driven
  • the chamfering circuit reads the resistance control signal in the memory module. This makes it possible to wait for the digital control signal when the drive system of the liquid crystal panel is activated.
  • the invention changes the discharge resistance of the chamfering circuit in the liquid crystal panel driving system into an adjustable resistance of the adjustable resistance value, so that the discharge slope can be changed by adjusting the resistance of the discharge resistor, thereby changing the uniformity of the liquid crystal panel, thus It is not necessary to change the discharge resistance by re-replacement of the discharge resistor, and it is also possible to adjust the uniformity of each liquid crystal panel, which is advantageous for improving the production quality of the liquid crystal panel.
  • FIG. 1 is a schematic diagram of a chamfering circuit in a driving system of a conventional liquid crystal panel
  • FIG. 2 is a schematic diagram of a VG signal generated according to a VGH signal output from a chamfering circuit
  • FIG. 3 is a schematic view showing a discharge resistance of a chamfering circuit in an embodiment of the present invention
  • FIG. 4 is a schematic diagram of control of a chamfering circuit in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a digital control signal input of a chamfering circuit in an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of control of another chamfering circuit in the embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a digital control signal input of another chamfering circuit in the embodiment of the present invention
  • FIG. 8 is a schematic diagram of a liquid crystal panel uniformity adjustment system according to an embodiment of the present invention
  • FIG. 9 is a flow chart of adjusting the uniformity of the liquid crystal panel in the embodiment of the present invention.
  • FIG. 3 is a specific embodiment of a chamfering circuit in a panel driving system of a liquid crystal display device according to the present invention.
  • the discharge resistor in the chamfering circuit is an adjustable resistor with adjustable resistance.
  • the adjustable resistor 10 is a digital resistor for controlling a relatively single tube, and a digital resistance controller is disposed outside the chamfering circuit for directly adjusting the resistance of the digital resistor.
  • the adjustable resistor 10 can also be other types of adjustable resistors.
  • the digital resistor includes a plurality of sub-resistors 11 connected in parallel, and each sub-resistor 11 is connected in series with a resistance adjustment switch 31, and the corresponding switch 31 is selected by receiving a digital control signal to obtain a desired resistance value.
  • the adjustable resistor 10 is connected in series with the function main switch 3.
  • the switch 3 receives the chamfering function control signal and controls the breaking of the line through the signal to realize the chamfering function.
  • the discharge slope can be changed by adjusting the resistance of the adjustable resistor 10, thereby changing the uniformity of the liquid crystal panel, and it is not necessary to replace the discharge resistor to adjust the resistance of the discharge resistor.
  • the adjustment of the uniformity of each liquid crystal panel is beneficial to improve the production quality of the liquid crystal panel.
  • a memory module 110 for storing a digital control signal preset value may be further added, and the memory module is connected to the digital resistor.
  • the digital control signal can be recorded in the memory module 110, so that when the driving system of the liquid crystal panel is started, there is no need to wait for the digital control signal. Instead, the resistance of the digital resistor is controlled between the preset values of the digital control signals stored by the memory module.
  • the adjustable resistor 10 has four sub-resistors, of course, more or less, but at least two or more; and two of the sub-resistors are selected for discharge by a digital control signal,
  • the output voltage waveform of the chamfer circuit can be obtained, as shown in FIG. 4, the voltage waveform of the output VGH signal, the driving circuit generates a VG driving signal of the liquid crystal panel according to the VGH signal, and the VG driving signal forms a chamfer, the cutting
  • the slope of the angle corresponds to the resistance of the adjustable resistor 10.
  • the digital control signal 1100 controls two sub-resistors to discharge
  • the digital control signal 1111 controls the four sub-resistors to discharge, so that the discharge slope changes twice (as shown in FIG. 6), which is beneficial to improve the uniformity of the panel.
  • Step ⁇ input a digital control signal to form a first discharge slope
  • Step ⁇ inputting the second digital control signal, causes the discharge slope to change again, forming a waveform having two slopes of the VGH signal as shown in FIG. 6, and the voltage waveform of the generated VG driving signal also has two chamfers.
  • a third digital control signal three slope cut angle waveforms can be formed, or more times of bit control signals can be sent to form more or even arc-shaped circles. Corner.
  • the invention also provides a uniformity adjustment system for a liquid crystal panel, as shown in FIG. 8 is a specific embodiment of the system, the system includes: a chamfer IC, the chamfer IC is provided with an adjustable resistance value Adjustable resistance; chamfer control fixture, used to feed chamfering function control signal and resistance control signal; panel brightness measuring instrument, used to measure the difference of partition brightness of LCD panel 200, and difference in partition brightness The information is fed back to the chamfer control fixture; the chamfer control fixture sends the resistance control signal to the chamfer IC according to the partition brightness difference information, and the chamfer IC controls the signal according to the chamfer function and the resistance control signal to the liquid crystal
  • the driver IC 210 of the panel charges and drives the liquid crystal panel display.
  • the adjustable resistor in the chamfer IC is also used as the adjustable resistor 10 (ie, digital resistor) as shown in FIG. 3, and each sub-resistor is disposed outside the chamfer IC, so as to minimize the resistance.
  • the chamfering IC is further provided with a memory module for storing the resistance control signal (ie, the digital control signal) input by the chamfer control fixture, so that when the driving system of the liquid crystal panel is started, there is no need to go. Waiting for the digital control signal.
  • Figure 9 shows the usage flow of the above uniformity adjustment system, including the following steps:
  • the difference in brightness of the partition side liquid crystal panel is subdivided, and the measurement result is fed back to the chamfer control jig, and the chamfer control jig determines a digital control signal by the difference in brightness of the partition;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶面板驱动系统中的切角电路及均齐度调整系统、方法，该切角电路包括放电电阻，所述放电电阻为阻值可调的可调电阻（10）。可以通过调节放电电阻阻值来改变放电斜率，从而改变液晶面板的均齐度，这样就不需要通过重新更换放电电阻来达到调整放电电阻，也就可以针对每一片液晶面板进行均齐度的调节。

Description

液晶面板驱动系统中的切角电路及均齐度调整系统、 方法 【技术领域】
本发明涉及液晶显示装置制造领域， 更具体的说， 涉及一种液晶面板驱动 系统中的切角电路及均齐度调整系统、 方法。
【背景技术】
为改善 LCD面板的均齐度，则需要降低回馈电压与线变效应，需要在 LCD 的驱动系统中加入切角电路， 通过切角电路调整驱动电压波形的斜率， 使其产 生切角， 然后再输出到 LCD面板的扫描线。 美国专利 US7027024 中记载了在 LCD的驱动系统中加入切角电路， 通过切角电路调整驱动电压波形使波形产生 具有一定斜率（此处的斜率是指电压波形和水平线之间的夹角， 其中 0度和 90 度是认为水平或垂直， 则不认为具有斜率的） 的切角， 然后再输出到 LCD面板 的扫描线的方案。 通常切角电路的各个组件均安装在 LCD 驱动系统的控制板 上。 目前， 切角电路已经广泛应用在每一个机种上面， 通常切角电路的各个组 件均安装在 LCD驱动系统的控制板上。
如图 1所示， 切角电路包括有放电电阻， 通过切角功能控制讯号控制放电 电阻进行放电使得输出的 VGH电压波形改变， 如图 2所示， 根据该 VGH信号 所生成的液晶面板 VG驱动信号的电压波形 （液晶面板扫描线的扫描电压的扫 描波形）就形成了切角。 驱动电压波形的切角斜率需要变换切角电路中的放电 电阻实现， 因此均齐度仅能以一片 LCD面板的调整结果套用到量产的 LCD面 板上， 这样的后果是量产的 LCD面板均齐度不一， 不能使 LCD面板达到最佳 效果。
【发明内容】
本发明所要解决的技术问题是提供一种可调整液晶面板均齐度的液晶面板 驱动系统中的切角电路及均齐度调整系统、 方法。 本发明的目的是通过以下技术方案来实现的： 一种液晶面板驱动系统中的 切角电路， 包括放电电阻， 所述放电电阻为阻值可调的可调电阻。
优选的， 所述可调电阻为数位电阻。 数位电阻调整的方式比较筒单。
优选的， 所述切角电路中还设置有用于存储数位控制讯号预设值的记忆模 块； 所述记忆模块与所述数位电阻控制连接。 这样可实现当液晶面板的驱动系 统启动时， 就不需要再去等待数位控制讯号了。
一种液晶面板均齐度调整系统， 包括： 切角电路芯片， 设置有阻值可调的 可调电阻； 切角控制治具， 用于给切角电路芯片输送控制切角时机的切角功能 控制讯号及控制所述可调电阻阻值的阻值控制讯号； 面板亮度量测仪器， 用于 量测液晶面板分区亮度差异， 并将分区亮度差异信息反馈到切角控制治具； 所 述切角控制治具根据所述分区亮度差异信息调整阻值控制讯号， 并将调整后的 阻值控制讯号发送至切角电路。
优选的， 所述可调电阻为数位电阻。 数位电阻调整比较筒单。
优选的， 所述可调电阻设置在切角电路芯片外。 避免电阻发热影响到切角
IC的正常使用。
优选的， 所述切角电路芯片还设置有用于存储所述切角控制治具输入的数 位控制讯号预设值的记忆模块； 所述记忆模块与所述数位电阻控制连接。 这样 可实现当液晶面板的驱动系统启动时， 就不需要再去等待数位控制讯号了。
一种液晶面板均齐度调整方法， 包括以下步骤： A: 量测液晶面板分区亮度 差异， B: 根据液晶面板分区亮度差异， 调整液晶面板驱动系统中切角电路的放 电电阻阻值以更改放电斜率。
优选的， 完成步骤 B中， 更改放电斜率后， 然后重复步骤 A及 B, 直至分 区亮度差异小于或等于预设的阈值。 这样可获得较佳的亮度差异值， 从而可以 确定最佳的放电电阻阻值。
优选的， 所述切角电路中的可调电阻为数位电阻， 所述切角电路还包括记 忆模块， 将所述分区亮度差异值对应的阻值控制讯号记录到记忆模块中， 当驱 动系统启动时， 切角电路在记忆模块中读取该阻值控制讯号。 这样可实现当液 晶面板的驱动系统启动时， 就不需要再去等待数位控制讯号了。
本发明由于将液晶面板驱动系统中切角电路的放电电阻改成可调节阻值的 可调电阻， 从而可以通过调节放电电阻阻值来改变放电斜率， 从而改变液晶面 板的均齐度， 这样就不需要通过重新更换放电电阻来达到调整放电电阻， 也就 可以针对每一片液晶面板进行均齐度的调节， 有利于提高液晶面板的生产质量。
【附图说明】
图 1是现有液晶面板的驱动系统中切角电路示意图，
图 2是根据切角电路输出的 VGH信号生成的 VG信号示意图，
图 3是本发明实施例中切角电路的放电电阻示意图，
图 4是本发明实施例中切角电路的控制示意图，
图 5是本发明实施例中切角电路的数位控制信号输入示意图，
图 6是本发明实施例中另一种切角电路的控制示意图，
图 7是本发明实施例中另一种切角电路的数位控制信号输入示意图， 图 8是本发明实施例中液晶面板均齐度调节系统示意图，
图 9是本发明实施例中液晶面板均齐度调节流程图。
【具体实施方式】
下面结合附图和较佳的实施例对本发明作进一步说明。
如图 3 所示为本发明提供的液晶显示装置的面板驱动系统中的切角电路的 一个具体实施例， 在本实施例中， 切角电路中的放电电阻为可调节阻值的可调 电阻 10, 该可调电阻 10为控制较为筒单的数位电阻， 切角电路外部设置有数位 电阻控制器用于直接调整数位电阻的阻值， 当然可调电阻 10也可为其它类型的 可调电阻。 所述数位电阻包括多个并联的子电阻 11 , 每个子电阻 11串联一个阻 值调整开关 31 , 通过接收数位控制讯号选择相应的开关 31获得所需要的阻值， 可调电阻 10与功能总开关 3串联， 开关 3接收切角功能控制讯号并通过该讯号 控制线路的开断， 以实现切角功能。 这样， 切角电路中可以通过调节可调电阻 10的阻值来改变放电斜率， 从而改变液晶面板的均齐度， 不需要通过重新更换 放电电阻来达到调整放电电阻的阻值， 也就可以针对每一片液晶面板进行均齐 度的调节， 有利于提高液晶面板的生产质量。
如图 4所示， 在驱动系统的切角电路芯片 （切角 IC ) 100中， 还可以增加 用于存储数位控制讯号预设值的记忆模块 110,该记忆模块与所述数位电阻控制 连接， 在确定好液晶面板的均齐度所对应的阻值后， 可将数位控制讯号记录在 记忆模块 110 中， 从而实现当液晶面板的驱动系统启动时， 就不需要再去等待 数位控制讯号了， 而是由记忆模块所存储的数位控制讯号预设值之间控制数位 电阻的阻值。
如图 5所示， 在本实施例中， 可调电阻 10具有四个子电阻， 当然， 也可以 更多或少， 但至少在两个及以上； 通过数位控制讯号选择其中两个子电阻进行 放电， 则可获切角电路的输出电压波形， 如图 4所示 ， 输出的 VGH信号的电 压波形， 驱动电路根据该 VGH信号生成液晶面板的 VG驱动信号， 该 VG驱动 信号形成了切角， 该切角的斜率与可调电阻 10的阻值相对应。
如图 6及图 7所示， 当然， 也可通过输入两次数位控制讯号， 即时序的输 入两次数位控制讯号， 并且两次数位控制讯号不同， 数位控制讯号 1100控制两 个子电阻进行放电， 而数位控制讯号 1111控制四个子电阻进行放电， 这样， 就 使得放电斜率发生两次变化（如图 6中所示）， 有利于提高面板的均齐度。 其具 体步骤可表示如下：
步骤 α、 输入一个数位控制讯号， 形成第一次放电斜率；
步骤 β、 输入第二个数位控制讯号， 使放电斜率再次发生改变， 形成如图 6 所示的 VGH信号具有两种斜率的波形， 而生成的 VG驱动信号的电压波形也具 有两次切角。 当然， 可以推断， 通过发送第三个数位控制讯号可以形成三种斜 率切角的波形， 或是发送更多次数位控制讯号， 形成更多甚至接近弧线形的圓 角。
本发明同时还提供一种液晶面板的均齐度调整系统， 如图 8所示为该系统 的一个具体实施例， 该系统包括： 切角 IC, 该切角 IC设置有阻值可调的可调电 阻； 切角控制治具， 用于给切角 IC输送切角功能控制讯号及阻值控制讯号； 面 板亮度量测仪器， 用于量测液晶面板 200 的分区亮度差异， 并将分区亮度差异 信息反馈到切角控制治具； 所述切角控制治具根据所述分区亮度差异信息将阻 值控制讯号发送至切角 IC,切角 IC根据切角功能控制讯号以及阻值控制讯号对 液晶面板的驱动 IC210进行充电进而驱动液晶面板显示。 该系统中， 所述的切 角 IC中可调电阻也是使用如图 3的可调电阻 10 (即数位电阻）， 并且， 各个子 电阻都是设置在切角 IC外部的， 这样可以尽量减少电阻发热对切角 IC的影响。 另外， 切角 IC中还设置有用于记忆所述切角控制治具输入的阻值控制讯号（即 数位控制讯号） 的记忆模块， 从而实现当液晶面板的驱动系统启动时， 就不需 要再去等待数位控制讯号了。
如图 9所示为上述均齐度调整系统的使用方法流程， 包括以下步骤：
1、 以预设电压 VGH点亮液晶面板；
2、 量侧液晶面板分区亮度差异， 并将该量测结果反馈到切角控制治具， 该 切角控制治具通过该分区亮度差异确定一个数位控制讯号；
3、 将数位控制讯号发送给切角 IC以改变切角电路的放电电阻阻值；
4、 重复上述步骤， 直至找到最小分区亮度差异值， 即小于或等于预设的阈 值的亮度差异值， 通过该值同时确定一个数位控制讯号并记录， 这样既可确定 一个最佳的放电电阻阻值， 从而获得最佳的电压波形；
5、 将最终的数位控制讯号作为预设值写入切角 IC的记忆模块中。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替 换， 都应当视为属于本发明的保护范围。

Claims

权利要求
1、 一种液晶面板驱动系统中的切角电路， 包括放电电阻， 所述放电电阻为 阻值可调的可调电阻。
2、 如权利要求 1所述的液晶面板驱动系统中的切角电路， 其中， 所述可调 电阻为数位电阻。
3、 如权利要求 2所述的液晶面板驱动系统中的切角电路， 其中， 所述切角 电路中还设置有用于存储数位控制讯号预设值的记忆模块； 所述记忆模块与所 述数位电阻控制连接。
4、 一种液晶面板均齐度调整系统， 包括：
切角电路芯片， 设置有阻值可调的可调电阻；
切角控制治具， 用于给切角电路芯片输送控制切角时机的切角功能控制讯 号及控制所述可调电阻阻值的阻值控制讯号；
面板亮度量测仪器， 用于量测液晶面板分区亮度差异， 并将分区亮度差异 信息反馈到切角控制治具；
所述切角控制治具根据所述分区亮度差异信息调整阻值控制讯号， 并将调 整后的阻值控制讯号发送至切角电路。
5、 如权利要求 4所述的液晶面板均齐度调整系统， 其中， 所述可调电阻为 数位电阻。
6、 如权利要求 5所述的液晶面板均齐度调整系统， 其中， 所述可调电阻设 置在切角电路芯片外。
7、 如权利要求 4所述的液晶面板均齐度调整系统， 其中， 所述切角电路芯 片还设置有用于存储所述切角控制治具输入的数位控制讯号预设值的记忆模 块； 所述记忆模块与所述数位电阻控制连接。
8、 一种液晶面板均齐度调整方法， 包括以下步骤：
A: 量测液晶面板分区亮度差异， B: 根据液晶面板分区亮度差异， 调整液晶面板驱动系统中切角电路的放电 电阻阻值以更改放电斜率。
9、 如权利要求 8所述的液晶面板均齐度调整方法， 其中， 完成步骤 B中， 更改放电斜率后， 然后重复步骤 A及 B, 直至分区亮度差异小于或等于预设的 阈值。
10、 如权利要求 9所述的液晶面板均齐度调整方法， 其中， 所述切角电路 中的可调电阻为数位电阻， 所述切角电路还包括记忆模块， 将所述分区亮度差 异值对应的阻值控制讯号记录到记忆模块中， 当驱动系统启动时， 切角电路在 记忆模块中读取该阻值控制讯号。
PCT/CN2012/086090 2012-11-23 2012-12-07 液晶面板驱动系统中的切角电路及均齐度调整系统、方法 WO2014079114A1 (zh)

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