WO2016155044A1 - Drive circuit and drive method - Google Patents

Drive circuit and drive method Download PDF

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Publication number
WO2016155044A1
WO2016155044A1 PCT/CN2015/076994 CN2015076994W WO2016155044A1 WO 2016155044 A1 WO2016155044 A1 WO 2016155044A1 CN 2015076994 W CN2015076994 W CN 2015076994W WO 2016155044 A1 WO2016155044 A1 WO 2016155044A1
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Prior art keywords
controller
gamma voltage
data
gamma
integrated circuit
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PCT/CN2015/076994
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French (fr)
Chinese (zh)
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曾德康
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深圳市华星光电技术有限公司
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Publication of WO2016155044A1 publication Critical patent/WO2016155044A1/en

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a driving circuit and a driving method.
  • liquid crystal displays have become the most common display devices.
  • Fig. 1 is a correlation curve of input gray scale and brightness under different viewing angles, wherein the horizontal axis represents gray scale, in this example there are 256 gray scales, and the vertical axis represents relative brightness.
  • the correlation curve is smoother and its gamma value is 2.2.
  • the viewing angle is 30°, the correlation curve will be biased.
  • the viewing angle is 60°, the correlation curve has produced considerable deviation, and the gamma value has also changed greatly.
  • the existing liquid crystal display has a technical problem of large viewing angle color shift, and the larger the viewing angle, the more serious the phenomenon of color drift.
  • An object of the present invention is to provide a driving circuit and a driving method for solving the technical problem that the existing liquid crystal display has a large viewing angle color shift.
  • the invention provides a driving circuit comprising a timing controller, a gamma voltage controller and a data source integrated circuit;
  • the timing controller outputs different assignments to the gamma voltage controller in two adjacent frames, the gamma voltage controllers in the adjacent two frames according to the different assignments to the data source integrated circuit Different gamma voltages are output so that the same sub-pixel obtains different gamma voltages in two adjacent frames.
  • the gamma voltage controller is capable of outputting n kinds of gamma voltages, and the timing controllers are correspondingly provided with n assignments. Among them, 4 ⁇ n ⁇ 14.
  • a register is disposed in the timing controller for storing the assignment.
  • the timing controller and the gamma voltage controller are connected by an integrated circuit bus.
  • the driving circuit further includes a data controller
  • the timing controller outputs a timing signal to the data controller, the data controller inputting a data signal to the data source integrated circuit;
  • the data source integrated circuit outputs a driving signal according to the data signal and the gamma voltage.
  • the refresh rate of the driving circuit is above 60 Hz.
  • the invention also provides a driving method comprising:
  • the timing controller outputs different assignments to the gamma voltage controller in two adjacent frames
  • the gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to the different assignments in two adjacent frames, so that the same sub-pixel obtains different gamma voltages in adjacent two frames.
  • the driving method further includes:
  • the timing controller outputs a timing signal to a data controller, and the data controller inputs a data signal to the data source integrated circuit;
  • the data source integrated circuit outputs a driving signal according to the data signal and the gamma voltage.
  • the gamma voltage controller is capable of outputting n kinds of gamma voltages, and the timing controllers are correspondingly provided with n assignments;
  • a register is disposed in the timing controller for storing the assignment.
  • the driving circuit and the driving method provided by the present invention can be applied to a liquid crystal display.
  • the timing controller outputs different assignments to the gamma voltage controller, so that the gamma voltage controller outputs different gamma voltages to the data source integrated circuit, so that the same sub-pixel is in phase.
  • Different gamma voltages are obtained in two adjacent frames.
  • each of the two sub-pixels has different optical brightness curves.
  • the two frames can be combined, and each of the synthesized images is synthesized.
  • the sub-pixel has a more ideal optical brightness curve, and its gamma value is closer to 2.2, thereby solving the technical problem of large viewing angle color shift.
  • 1 is a schematic diagram showing correlation curves of input gray scale and brightness of a conventional liquid crystal display at different viewing angles
  • FIG. 2 is a schematic diagram of a driving circuit according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an optical brightness curve achieved by a driving circuit according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of a driving method provided by an embodiment of the present invention.
  • Embodiments of the present invention provide a driving circuit including a timing controller, a gamma voltage controller, and a data source integrated circuit.
  • the timing controller outputs different assignments to the gamma voltage controller in two adjacent frames
  • the gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to different assignments in two adjacent frames, so that the same sub- The pixel obtains a different gamma voltage in two adjacent frames.
  • the driving circuit provided by the embodiment of the invention can be applied to a liquid crystal display.
  • the timing controller outputs different assignments to the gamma voltage controller, so that the gamma voltage controller outputs different gamma voltages to the data source integrated circuit, so that the same sub-pixel is in phase.
  • Different gamma voltages are obtained in two adjacent frames.
  • each of the two sub-pixels has different optical brightness curves.
  • the two frames can be combined, and each of the synthesized images is synthesized.
  • the sub-pixel has a more ideal optical brightness curve, and its gamma value is closer to 2.2, thereby solving the technical problem of large viewing angle color shift.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the driving circuit provided by the embodiment of the present invention includes a timing controller (Timing Controller, T-CON for short), a gamma voltage controller, and a data source integrated circuit (Data IC), wherein the gamma voltage controller can A gamma voltage programmable integrated controller (P-gamma IC) is used.
  • Timing Controller T-CON for short
  • Data IC data source integrated circuit
  • P-gamma IC gamma voltage programmable integrated controller
  • the timing controller outputs different assignments to the gamma voltage controller in two adjacent frames, and the gamma voltage controller outputs different gamma voltages to the data source integrated circuits according to different assignments in two adjacent frames.
  • the driving circuit provided by the embodiment of the present invention further includes a data controller disposed in the timing controller, the timing controller outputs a timing signal to the data controller, and the data controller inputs the data signal to the data source integrated circuit.
  • the data source integrated circuit then outputs a drive signal to each of the data lines in the liquid crystal panel based on the data signal and the gamma voltage.
  • the timing controller and the gamma voltage controller pass through the integrated circuit bus.
  • IIC Inter-Integrated Circuit
  • the integrated circuit bus uses the fewest signal lines in various buses and has functions such as automatic addressing, multi-master clock synchronization, and arbitration. Therefore, the use of an integrated circuit bus in a driving circuit has the advantages of convenience, flexibility, and small size.
  • the program of the timing controller contains two P-gamma programs, and the two P-gamma programs correspond to different assignments in the registers.
  • the timing controller obtains an appropriate assignment through one of the P-gamma programs and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding gamma voltage to the data source integrated circuit according to the assignment.
  • the timing controller also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit.
  • the data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the frame image has the gamma voltage display.
  • the timing controller acquires another assignment through another P-gamma program and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding difference to the data source integrated circuit according to the assignment.
  • the gamma voltage of the frame is also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit.
  • the data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the image of the frame is different from the previous one.
  • the gamma voltage of the frame is displayed.
  • each of the two sub-pixels has a different optical luminance curve.
  • the two frames of images can be synthesized, and the optical brightness curves of the respective sub-pixels in the synthesized image are closer to the ideal curve, as shown in FIG. 3, and The horse value is closer to 2.2, which solves the technical problem of color drift of large viewing angle and improves the display quality of the liquid crystal display.
  • the refresh rate of the driving circuit provided by the embodiment of the present invention is above 60 Hz.
  • the refresh rate of the liquid crystal display the better the technology for solving the color shift of the large viewing angle. problem.
  • the technical solution provided by the embodiment of the present invention achieves the technical problem of improving color drift from time by improving the timing controller.
  • the technical solution provided by the embodiment of the present invention has the following advantages: no need to add a lot of scan lines in the liquid crystal panel, compared with the technical solution (pixel partitioning technology) that improves the color drift in space.
  • the circuit structure such as the data line and the thin film transistor does not lower the aperture ratio and the transmittance of the liquid crystal panel, and the circuit structure is simpler, thereby reducing the complexity of the manufacturing process and the production cost.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment of the invention further provides a driving method, which can be used in a liquid crystal display device such as a liquid crystal television, a mobile phone or a tablet computer.
  • a driving method includes:
  • the timing controller outputs different assignments to the gamma voltage controller in two adjacent frames.
  • the gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to different assignments in two adjacent frames, so that the same sub-pixel obtains different gamma voltages in adjacent two frames.
  • the driving method further includes:
  • the timing controller outputs a timing signal to the data controller, and the data controller inputs the data signal to the data source integrated circuit.
  • the data source integrated circuit outputs the driving signal according to the data signal and the gamma voltage.
  • the program of the timing controller includes two P-gamma programs, and the two P-gamma programs correspond to different assignments in the registers.
  • the timing controller obtains an appropriate assignment through one of the P-gamma programs and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding gamma voltage to the data source integrated circuit according to the assignment.
  • the timing controller also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit.
  • the data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the frame image has the gamma voltage display.
  • the timing controller acquires another assignment through another P-gamma program and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding difference to the data source integrated circuit according to the assignment.
  • the gamma voltage of the frame is also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit.
  • the data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the image of the frame is different from the previous one.
  • the gamma voltage of the frame is displayed.
  • each of the two sub-pixels has a different optical luminance curve.
  • the two frames of images can be synthesized, and the optical brightness curves of the respective sub-pixels in the synthesized image are closer to the ideal curve, as shown in FIG. And its gamma value is closer to 2.2, which solves the technical problem of color drift of large viewing angle and improves the display quality of the liquid crystal display.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
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  • Nonlinear Science (AREA)
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Abstract

A drive circuit and a drive method. The drive circuit comprises a time sequence controller, a gamma voltage controller and a data source integrated circuit; the time sequence controller outputs different assignments in two adjacent frames to the gamma voltage controller (S11), and the gamma voltage controller outputs, according to the different assignments, different gamma voltages to the data source integrated circuit in the two adjacent frames (S12), so that a same sub-pixel obtains different gamma voltages in the two adjacent frames. The drive circuit and the drive method can be used for display apparatuses such as a liquid crystal display television, a liquid crystal display, a mobile phone, a tablet personal computer and the like, and solve the technical problem of color drift at a large viewing angle in an existing liquid crystal display.

Description

驱动电路及驱动方法Driving circuit and driving method
本申请要求享有2015年4月1日提交的名称为“驱动电路及驱动方法”的中国专利申请CN201510153052.7的优先权，其全部内容通过引用并入本文中。The present application claims priority to Chinese Patent Application No. CN201510153052.7, filed on Apr. 1, 2015, which is hereby incorporated by reference.
技术领域Technical field
本发明涉及显示技术领域，具体地说，涉及一种驱动电路及驱动方法。The present invention relates to the field of display technologies, and in particular, to a driving circuit and a driving method.
背景技术Background technique
随着显示技术的发展，液晶显示器已经成为最为常见的显示装置。With the development of display technology, liquid crystal displays have become the most common display devices.
在观看液晶显示器显示的图像时，如果观看视角变大，观看到的图像就会出现颜色漂移(color shift)的现象。观看视角越大，颜色漂移的现象就越严重。图1为不同观看视角下的输入灰阶与亮度的相关曲线，其中横轴表示灰阶，本例中共有256个灰阶，纵轴表示相对亮度。从图1中可以看出，观看视角为0°时(正面观看时)，相关曲线较为平滑，其伽马(gamma)值为2.2。观看视角为30°时，相关曲线会产生偏差，观看视角为60°时，相关曲线已经产生了相当大的偏差，其伽马值也发生了较大变化。When viewing an image displayed on a liquid crystal display, if the viewing angle becomes large, a color shift phenomenon occurs in the viewed image. The greater the viewing angle, the more severe the color drift. Fig. 1 is a correlation curve of input gray scale and brightness under different viewing angles, wherein the horizontal axis represents gray scale, in this example there are 256 gray scales, and the vertical axis represents relative brightness. As can be seen from Fig. 1, when the viewing angle is 0° (when viewed from the front), the correlation curve is smoother and its gamma value is 2.2. When the viewing angle is 30°, the correlation curve will be biased. When the viewing angle is 60°, the correlation curve has produced considerable deviation, and the gamma value has also changed greatly.
因此，现有的液晶显示器存在大观看视角颜色漂移的技术问题，并且观看视角越大，颜色漂移的现象越严重。Therefore, the existing liquid crystal display has a technical problem of large viewing angle color shift, and the larger the viewing angle, the more serious the phenomenon of color drift.
发明内容Summary of the invention
本发明的目的在于提供一种驱动电路及驱动方法，以解决现有的液晶显示器存在大观看视角颜色漂移的技术问题。An object of the present invention is to provide a driving circuit and a driving method for solving the technical problem that the existing liquid crystal display has a large viewing angle color shift.
本发明提供一种驱动电路，包括时序控制器、伽马电压控制器和数据源集成电路；The invention provides a driving circuit comprising a timing controller, a gamma voltage controller and a data source integrated circuit;
所述时序控制器在相邻两帧中向所述伽马电压控制器输出不同的赋值，所述伽马电压控制器在相邻两帧中根据所述不同的赋值向所述数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames, the gamma voltage controllers in the adjacent two frames according to the different assignments to the data source integrated circuit Different gamma voltages are output so that the same sub-pixel obtains different gamma voltages in two adjacent frames.
优选的是，所述伽马电压控制器能够输出n种伽马电压，所述时序控制器中相应设置有n个赋值。其中，4≤n≤14。Preferably, the gamma voltage controller is capable of outputting n kinds of gamma voltages, and the timing controllers are correspondingly provided with n assignments. Among them, 4 ≤ n ≤ 14.
进一步的是，所述时序控制器中设置有寄存器，用于存储所述赋值。 Further, a register is disposed in the timing controller for storing the assignment.
优选的是，所述时序控制器与所述伽马电压控制器之间通过集成电路总线连接。Preferably, the timing controller and the gamma voltage controller are connected by an integrated circuit bus.
进一步的是，该驱动电路还包括数据控制器；Further, the driving circuit further includes a data controller;
所述时序控制器向所述数据控制器输出时序信号，所述数据控制器向所述数据源集成电路输入数据信号；The timing controller outputs a timing signal to the data controller, the data controller inputting a data signal to the data source integrated circuit;
所述数据源集成电路根据所述数据信号和所述伽马电压输出驱动信号。The data source integrated circuit outputs a driving signal according to the data signal and the gamma voltage.
优选的是，所述驱动电路的刷新率在60Hz以上。Preferably, the refresh rate of the driving circuit is above 60 Hz.
本发明还提供一种驱动方法，包括：The invention also provides a driving method comprising:
时序控制器在相邻两帧中向伽马电压控制器输出不同的赋值；The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames;
所述伽马电压控制器在相邻两帧中根据所述不同的赋值向数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。The gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to the different assignments in two adjacent frames, so that the same sub-pixel obtains different gamma voltages in adjacent two frames.
进一步的是，该驱动方法还包括：Further, the driving method further includes:
所述时序控制器向数据控制器输出时序信号，所述数据控制器向所述数据源集成电路输入数据信号；The timing controller outputs a timing signal to a data controller, and the data controller inputs a data signal to the data source integrated circuit;
所述数据源集成电路根据所述数据信号和所述伽马电压输出驱动信号。The data source integrated circuit outputs a driving signal according to the data signal and the gamma voltage.
优选的是，所述伽马电压控制器能够输出n种伽马电压，所述时序控制器中相应设置有n个赋值；Preferably, the gamma voltage controller is capable of outputting n kinds of gamma voltages, and the timing controllers are correspondingly provided with n assignments;
其中，4≤n≤14。Among them, 4 ≤ n ≤ 14.
进一步的是，所述时序控制器中设置有寄存器，用于存储所述赋值。Further, a register is disposed in the timing controller for storing the assignment.
本发明带来了以下有益效果：本发明提供的驱动电路及驱动方法可应用于液晶显示器中。在液晶显示器所显示的连续两帧图像中，时序控制器向伽马电压控制器输出不同的赋值，使伽马电压控制器向数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。这样，这两帧图像中的各个子像素就各自具有不同的光学亮度曲线，人眼在短时间内观看到这两帧图像时，能够将这两帧图像进行合成，合成后的图像中的各个子像素具有较理想的光学亮度曲线，并且其伽马值更接近于2.2，从而解决了大观看视角颜色漂移的技术问题。The present invention brings about the following beneficial effects: the driving circuit and the driving method provided by the present invention can be applied to a liquid crystal display. In the continuous two frames of images displayed on the liquid crystal display, the timing controller outputs different assignments to the gamma voltage controller, so that the gamma voltage controller outputs different gamma voltages to the data source integrated circuit, so that the same sub-pixel is in phase. Different gamma voltages are obtained in two adjacent frames. In this way, each of the two sub-pixels has different optical brightness curves. When the human eye views the two frames in a short time, the two frames can be combined, and each of the synthesized images is synthesized. The sub-pixel has a more ideal optical brightness curve, and its gamma value is closer to 2.2, thereby solving the technical problem of large viewing angle color shift.
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.
附图说明DRAWINGS
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要的附图 做简单的介绍：In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following drawings will be described in the description of the embodiments. Make a brief introduction:
图1是现有的液晶显示器在不同观看视角下的输入灰阶与亮度的相关曲线示意图；1 is a schematic diagram showing correlation curves of input gray scale and brightness of a conventional liquid crystal display at different viewing angles;
图2是本发明实施例提供的驱动电路的示意图；2 is a schematic diagram of a driving circuit according to an embodiment of the present invention;
图3是本发明实施例提供的驱动电路所达到的光学亮度曲线的示意图；3 is a schematic diagram of an optical brightness curve achieved by a driving circuit according to an embodiment of the present invention;
图4是本发明实施例提供的驱动方法的流程图。4 is a flow chart of a driving method provided by an embodiment of the present invention.
具体实施方式detailed description
以下将结合附图及实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是，只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形成的技术方案均在本发明的保护范围之内。The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, in which the present invention can be applied to the technical problems, and the implementation of the technical effects can be fully understood and implemented. It should be noted that the various embodiments of the present invention and the various features of the various embodiments may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
本发明实施例提供一种驱动电路，包括时序控制器、伽马电压控制器和数据源集成电路。时序控制器在相邻两帧中向伽马电压控制器输出不同的赋值，伽马电压控制器在相邻两帧中根据不同的赋值向数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。Embodiments of the present invention provide a driving circuit including a timing controller, a gamma voltage controller, and a data source integrated circuit. The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames, and the gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to different assignments in two adjacent frames, so that the same sub- The pixel obtains a different gamma voltage in two adjacent frames.
本发明实施例提供的驱动电路可应用于液晶显示器中。在液晶显示器所显示的连续两帧图像中，时序控制器向伽马电压控制器输出不同的赋值，使伽马电压控制器向数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。这样，这两帧图像中的各个子像素就各自具有不同的光学亮度曲线，人眼在短时间内观看到这两帧图像时，能够将这两帧图像进行合成，合成后的图像中的各个子像素具有较理想的光学亮度曲线，并且其伽马值更接近于2.2，从而解决了大观看视角颜色漂移的技术问题。The driving circuit provided by the embodiment of the invention can be applied to a liquid crystal display. In the continuous two frames of images displayed on the liquid crystal display, the timing controller outputs different assignments to the gamma voltage controller, so that the gamma voltage controller outputs different gamma voltages to the data source integrated circuit, so that the same sub-pixel is in phase. Different gamma voltages are obtained in two adjacent frames. In this way, each of the two sub-pixels has different optical brightness curves. When the human eye views the two frames in a short time, the two frames can be combined, and each of the synthesized images is synthesized. The sub-pixel has a more ideal optical brightness curve, and its gamma value is closer to 2.2, thereby solving the technical problem of large viewing angle color shift.
实施例一：Embodiment 1:
如图2所示，本发明实施例提供的驱动电路包括时序控制器(Timing Controller，简称T-CON)、伽马电压控制器和数据源集成电路(Data IC)，其中伽马电压控制器可以采用伽马电压可编程集成控制器(P-gamma IC)。As shown in FIG. 2, the driving circuit provided by the embodiment of the present invention includes a timing controller (Timing Controller, T-CON for short), a gamma voltage controller, and a data source integrated circuit (Data IC), wherein the gamma voltage controller can A gamma voltage programmable integrated controller (P-gamma IC) is used.
时序控制器在相邻两帧中向伽马电压控制器输出不同的赋值，伽马电压控制器在相邻两帧中根据不同的赋值向数据源集成电路输出不同的伽马电压。进一步的是，本发明实施例提供的驱动电路中，还包括设置在时序控制器中的数据控制器，时序控制器向数据控制器输出时序信号，数据控制器向数据源集成电路输入数据信号，然后数据源集成电路根据数据信号和伽马电压，向液晶面板中的各条数据线输出驱动信号。The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames, and the gamma voltage controller outputs different gamma voltages to the data source integrated circuits according to different assignments in two adjacent frames. Further, the driving circuit provided by the embodiment of the present invention further includes a data controller disposed in the timing controller, the timing controller outputs a timing signal to the data controller, and the data controller inputs the data signal to the data source integrated circuit. The data source integrated circuit then outputs a drive signal to each of the data lines in the liquid crystal panel based on the data signal and the gamma voltage.
作为一个优选方案，时序控制器与伽马电压控制器之间通过集成电路总线 (Inter-Integrated Circuit，简称IIC)连接。集成电路总线是各种总线中使用信号线最少的，并且具有自动寻址、多主机时钟同步和仲裁等功能。因此，在驱动电路中使用集成电路总线具有方便灵活，体积小等优点。As a preferred solution, the timing controller and the gamma voltage controller pass through the integrated circuit bus. (Inter-Integrated Circuit, IIC for short) connection. The integrated circuit bus uses the fewest signal lines in various buses and has functions such as automatic addressing, multi-master clock synchronization, and arbitration. Therefore, the use of an integrated circuit bus in a driving circuit has the advantages of convenience, flexibility, and small size.
本实施例中，伽马电压控制器能够输出n种伽马电压，时序控制器中相应设置有n个赋值，n的值通常在4至14之间。本实施例中以n＝10为例，此外，时序控制器中还设置有寄存器(register)，用于存储该10个赋值。In this embodiment, the gamma voltage controller can output n kinds of gamma voltages, and the timing controllers are correspondingly provided with n assignments, and the value of n is usually between 4 and 14. In this embodiment, n=10 is taken as an example. In addition, a register is also provided in the timing controller for storing the 10 assignments.
本发明实施例提供的驱动电路的工作过程如下：The working process of the driving circuit provided by the embodiment of the present invention is as follows:
时序控制器的程序中包含两个P-gamma程序，且两个P-gamma程序对应寄存器中不同的赋值。The program of the timing controller contains two P-gamma programs, and the two P-gamma programs correspond to different assignments in the registers.
在第一帧中，时序控制器通过其中一个P-gamma程序获取一个合适的赋值，并向伽马电压控制器输出，伽马电压控制器根据该赋值向数据源集成电路输出相应的伽马电压。同时，时序控制器还向数据控制器输出时序信号，然后数据控制器向数据源集成电路输入数据信号。数据源集成电路就可以根据数据信号和伽马电压，向液晶面板中的各条数据线输出驱动信号，实现该帧图像的显示，使这一帧图像中的各个子像素均以该伽马电压显示。In the first frame, the timing controller obtains an appropriate assignment through one of the P-gamma programs and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding gamma voltage to the data source integrated circuit according to the assignment. . At the same time, the timing controller also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit. The data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the frame image has the gamma voltage display.
在第二帧中，时序控制器通过另一个P-gamma程序获取另一赋值，并向伽马电压控制器输出，伽马电压控制器根据该赋值向数据源集成电路输出相应的不同于前一帧的伽马电压。同时，时序控制器还向数据控制器输出时序信号，然后数据控制器向数据源集成电路输入数据信号。数据源集成电路就可以根据数据信号和伽马电压，向液晶面板中的各条数据线输出驱动信号，实现该帧图像的显示，使这一帧图像中的各个子像素均以不同于前一帧的伽马电压显示。In the second frame, the timing controller acquires another assignment through another P-gamma program and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding difference to the data source integrated circuit according to the assignment. The gamma voltage of the frame. At the same time, the timing controller also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit. The data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the image of the frame is different from the previous one. The gamma voltage of the frame is displayed.
由于在这两帧中伽马电压控制器输出的伽马电压不同，所以这两帧图像中的各个子像素具有不同的光学亮度曲线。人眼在短时间内观看到这两帧图像时，能够将这两帧图像进行合成，合成后的图像中的各个子像素的光学亮度曲线更加接近理想曲线，如图3所示，并且其伽马值更接近于2.2，从而解决了大观看视角颜色漂移的技术问题，提高了液晶显示器的显示品质。Since the gamma voltages output by the gamma voltage controller are different in the two frames, each of the two sub-pixels has a different optical luminance curve. When the human eye views the two frames of images in a short time, the two frames of images can be synthesized, and the optical brightness curves of the respective sub-pixels in the synthesized image are closer to the ideal curve, as shown in FIG. 3, and The horse value is closer to 2.2, which solves the technical problem of color drift of large viewing angle and improves the display quality of the liquid crystal display.
优选的是，本发明实施例提供的驱动电路的刷新率在60Hz以上。人眼在对连续两帧图像进行合成时，两帧图像的时间间隔越短，合成效果也就越好，所以液晶显示器的刷新率越高，就能够越好的解决大观看视角颜色漂移的技术问题。Preferably, the refresh rate of the driving circuit provided by the embodiment of the present invention is above 60 Hz. When the human eye synthesizes two consecutive frames of images, the shorter the time interval between the two frames, the better the synthesis effect. Therefore, the higher the refresh rate of the liquid crystal display, the better the technology for solving the color shift of the large viewing angle. problem.
本发明实施例提供的技术方案通过对时序控制器进行改进，实现了从时间上改善颜色漂移的技术问题。相比于目前应用较多的从空间上改善颜色漂移的技术方案(像素分区技术)，本发明实施例提供的技术方案具有以下优点：不需要在液晶面板中增加很多扫描线、 数据线、薄膜晶体管等电路结构，所以不会降低液晶面板的开口率和透过率，并且由于电路结构更为简单，从而降低了制造过程的复杂程度和生产成本。The technical solution provided by the embodiment of the present invention achieves the technical problem of improving color drift from time by improving the timing controller. The technical solution provided by the embodiment of the present invention has the following advantages: no need to add a lot of scan lines in the liquid crystal panel, compared with the technical solution (pixel partitioning technology) that improves the color drift in space. The circuit structure such as the data line and the thin film transistor does not lower the aperture ratio and the transmittance of the liquid crystal panel, and the circuit structure is simpler, thereby reducing the complexity of the manufacturing process and the production cost.
实施例二：Embodiment 2:
本发明实施例还提供一种驱动方法，可用于液晶电视、手机、平板电脑等液晶显示装置中。如图4所示，该驱动方法包括：The embodiment of the invention further provides a driving method, which can be used in a liquid crystal display device such as a liquid crystal television, a mobile phone or a tablet computer. As shown in FIG. 4, the driving method includes:
S11：时序控制器在相邻两帧中向伽马电压控制器输出不同的赋值。S11: The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames.
S12：伽马电压控制器在相邻两帧中根据不同的赋值向数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。S12: The gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to different assignments in two adjacent frames, so that the same sub-pixel obtains different gamma voltages in adjacent two frames.
进一步的是，该驱动方法还包括：Further, the driving method further includes:
S2：时序控制器向数据控制器输出时序信号，数据控制器向数据源集成电路输入数据信号。S2: The timing controller outputs a timing signal to the data controller, and the data controller inputs the data signal to the data source integrated circuit.
S3：数据源集成电路根据数据信号和伽马电压输出驱动信号。S3: The data source integrated circuit outputs the driving signal according to the data signal and the gamma voltage.
本实施例中，伽马电压控制器能够输出n种伽马电压，时序控制器中相应设置有n个赋值，n的值通常在4至14之间。本实施例中以n＝10为例，此外，时序控制器中还设置有寄存器，用于存储该10个赋值。In this embodiment, the gamma voltage controller can output n kinds of gamma voltages, and the timing controllers are correspondingly provided with n assignments, and the value of n is usually between 4 and 14. In this embodiment, n=10 is taken as an example. In addition, a register is also provided in the timing controller for storing the 10 assignments.
本实施例中，时序控制器的程序中包含两个P-gamma程序，且两个P-gamma程序对应寄存器中不同的赋值。In this embodiment, the program of the timing controller includes two P-gamma programs, and the two P-gamma programs correspond to different assignments in the registers.
在第一帧中，时序控制器通过其中一个P-gamma程序获取一个合适的赋值，并向伽马电压控制器输出，伽马电压控制器根据该赋值向数据源集成电路输出相应的伽马电压。同时，时序控制器还向数据控制器输出时序信号，然后数据控制器向数据源集成电路输入数据信号。数据源集成电路就可以根据数据信号和伽马电压，向液晶面板中的各条数据线输出驱动信号，实现该帧图像的显示，使这一帧图像中的各个子像素均以该伽马电压显示。In the first frame, the timing controller obtains an appropriate assignment through one of the P-gamma programs and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding gamma voltage to the data source integrated circuit according to the assignment. . At the same time, the timing controller also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit. The data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the frame image has the gamma voltage display.
在第二帧中，时序控制器通过另一个P-gamma程序获取另一赋值，并向伽马电压控制器输出，伽马电压控制器根据该赋值向数据源集成电路输出相应的不同于前一帧的伽马电压。同时，时序控制器还向数据控制器输出时序信号，然后数据控制器向数据源集成电路输入数据信号。数据源集成电路就可以根据数据信号和伽马电压，向液晶面板中的各条数据线输出驱动信号，实现该帧图像的显示，使这一帧图像中的各个子像素均以不同于前一帧的伽马电压显示。In the second frame, the timing controller acquires another assignment through another P-gamma program and outputs it to the gamma voltage controller, and the gamma voltage controller outputs a corresponding difference to the data source integrated circuit according to the assignment. The gamma voltage of the frame. At the same time, the timing controller also outputs a timing signal to the data controller, and then the data controller inputs the data signal to the data source integrated circuit. The data source integrated circuit can output a driving signal to each data line in the liquid crystal panel according to the data signal and the gamma voltage, thereby realizing display of the frame image, so that each sub-pixel in the image of the frame is different from the previous one. The gamma voltage of the frame is displayed.
由于在这两帧中伽马电压控制器输出的伽马电压不同，所以这两帧图像中的各个子像素具有不同的光学亮度曲线。人眼在短时间内观看到这两帧图像时，能够将这两帧图像进行合成，合成后的图像中的各个子像素的光学亮度曲线更加接近理想曲线，如图3所示， 并且其伽马值更接近于2.2，从而解决了大观看视角颜色漂移的技术问题，提高了液晶显示器的显示品质。Since the gamma voltages output by the gamma voltage controller are different in the two frames, each of the two sub-pixels has a different optical luminance curve. When the human eye views the two frames of images in a short time, the two frames of images can be synthesized, and the optical brightness curves of the respective sub-pixels in the synthesized image are closer to the ideal curve, as shown in FIG. And its gamma value is closer to 2.2, which solves the technical problem of color drift of large viewing angle and improves the display quality of the liquid crystal display.
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。 While the embodiments of the present invention have been described above, the described embodiments are merely illustrative of the embodiments of the invention and are not intended to limit the invention. Any modification and variation of the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. It is still subject to the scope defined by the appended claims.

Claims (10)

  1. 一种驱动电路，包括时序控制器、伽马电压控制器和数据源集成电路；A driving circuit comprising a timing controller, a gamma voltage controller and a data source integrated circuit;
    所述时序控制器在相邻两帧中向所述伽马电压控制器输出不同的赋值，所述伽马电压控制器在相邻两帧中根据所述不同的赋值向所述数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames, the gamma voltage controllers in the adjacent two frames according to the different assignments to the data source integrated circuit Different gamma voltages are output so that the same sub-pixel obtains different gamma voltages in two adjacent frames.
  2. 根据权利要求1所述的驱动电路，其中，所述伽马电压控制器能够输出n种伽马电压，所述时序控制器中相应设置有n个赋值；The driving circuit according to claim 1, wherein the gamma voltage controller is capable of outputting n kinds of gamma voltages, and the timing controllers are respectively provided with n assignment values;
    其中，4≤n≤14。Among them, 4 ≤ n ≤ 14.
  3. 根据权利要求1所述的驱动电路，其中，所述时序控制器中设置有寄存器，用于存储所述赋值。The drive circuit according to claim 1, wherein a register is provided in said timing controller for storing said assignment.
  4. 根据权利要求1所述的驱动电路，其中，所述时序控制器与所述伽马电压控制器之间通过集成电路总线连接。The driving circuit according to claim 1, wherein said timing controller and said gamma voltage controller are connected by an integrated circuit bus.
  5. 根据权利要求1所述的驱动电路，其中，还包括数据控制器；The driving circuit according to claim 1, further comprising a data controller;
    所述时序控制器向所述数据控制器输出时序信号，所述数据控制器向所述数据源集成电路输入数据信号；The timing controller outputs a timing signal to the data controller, the data controller inputting a data signal to the data source integrated circuit;
    所述数据源集成电路根据所述数据信号和所述伽马电压输出驱动信号。The data source integrated circuit outputs a driving signal according to the data signal and the gamma voltage.
  6. 根据权利要求1所述的驱动电路，其中，所述驱动电路的刷新率在60Hz以上。The driving circuit according to claim 1, wherein a refresh rate of said driving circuit is 60 Hz or more.
  7. 一种驱动方法，包括：A driving method comprising:
    时序控制器在相邻两帧中向伽马电压控制器输出不同的赋值；The timing controller outputs different assignments to the gamma voltage controller in two adjacent frames;
    所述伽马电压控制器在相邻两帧中根据所述不同的赋值向数据源集成电路输出不同的伽马电压，使同一子像素在相邻两帧中获得不同的伽马电压。The gamma voltage controller outputs different gamma voltages to the data source integrated circuit according to the different assignments in two adjacent frames, so that the same sub-pixel obtains different gamma voltages in adjacent two frames.
  8. 根据权利要求7所述的驱动方法，其中，还包括：The driving method according to claim 7, further comprising:
    所述时序控制器向数据控制器输出时序信号，所述数据控制器向所述数据源集成电路输入数据信号；The timing controller outputs a timing signal to a data controller, and the data controller inputs a data signal to the data source integrated circuit;
    所述数据源集成电路根据所述数据信号和所述伽马电压输出驱动信号。The data source integrated circuit outputs a driving signal according to the data signal and the gamma voltage.
  9. 根据权利要求7所述的驱动方法，其中，所述伽马电压控制器能够输出n种伽马电压，所述时序控制器中相应设置有n个赋值；The driving method according to claim 7, wherein the gamma voltage controller is capable of outputting n kinds of gamma voltages, and the timing controllers are respectively provided with n assignment values;
    其中，4≤n≤14。Among them, 4 ≤ n ≤ 14.
  10. 根据权利要求7所述的驱动方法，其中，所述时序控制器中设置有寄存器，用于存储所述赋值。 The driving method according to claim 7, wherein a register is provided in said timing controller for storing said assignment.
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