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Source driver and display device

A source driver and source line technology, applied to instruments, static indicators, etc., can solve the problem of image quality degradation and achieve the effect of suppressing uneven brightness

Active Publication Date: 2021-07-02
LAPIS SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In a display device in which a gate driver and a source driver are arranged on one side of the display panel, there may be a case where the wiring resistance or capacitance of the wiring between the gate driver (that is, the scan driver) and each scan line The deviation of the wiring load caused by it causes the quality degradation of the displayed image

Method used

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  • Source driver and display device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] figure 1 It is a block diagram showing the configuration of the display device 100 of the present invention. The display device 100 is a liquid crystal display device of an active matrix driving method. The display device 100 includes a display panel 11, a display controller 12, gate drivers 13A and 13B, and source drivers 14-1 to 14-p.

[0031] The display panel 11 is composed of a plurality of pixel portions P arranged in a matrix. 11 ~P nm and pixel switch M 11 ~ M nm (n, m: natural numbers greater than or equal to 2) semiconductor substrate configuration. The display panel 11 has n gate lines GL1 to GLn and m source lines SL1 to SLm arranged to intersect them. In the following description, any one of the n gate lines GL1 to GLn may be described as the gate line GLk, and any one of the m source lines SL1 to SLm may be described as The source line is described as the case of the source line SLx. Pixel part P 11 ~P nm and pixel switch M 11 ~ M nm They are p...

Embodiment 2

[0094] Next, Example 2 of the present invention will be described. The display device of the second embodiment differs from the display device 100 of the first embodiment in the internal structure and operation of the timing control section 24 of the source driver IC. In the following description, the IC constituting the source driver 14-1 is referred to as IC1, and the IC constituting the source driver 14-y located in the center among the source drivers 14-1 to 14-p is referred to as IC1. for ICy.

[0095] Figure 7 It is a block diagram showing the internal configuration of the timing control unit 24 of the display device according to the second embodiment together with the source control core 20 and the data latch unit 21 . The timing control unit 24 has a gate line counter 31 , a register 32 , a gate line direction output delay timing generation unit 41 , a source line direction output delay timing generation unit 42 , and a setting signal addition unit 43 .

[0096] Th...

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Abstract

The present invention relates to a source driver and a display device and provides the source driver that can suppress uneven brightness. The invention has a data latch unit that sequentially imports pixel data slice groups from a video data signal in a predetermined cycle and sequentially outputs the imported m pixel data slices from m output terminals, a gray-scale voltage conversion unit that sequentially imports the pixel data slices output from the data latch unit and converts the slices into gray-scale voltage, an output part that amplifies and outputs the gray-scale voltage to a source line, and a timing control section that controls output timing of the pixel data slices of the data latch part. Each of the n pixel data slice groups is a pixel data slice group corresponding to a gray voltage signal to be supplied with a pixel column along each of the n gate lines. The The timing control part makes the timing difference between the input of the pixel data slice group by the data latch unit and the output of the pixel data slice controlled as the length of the source line from the source driver to the pixel column becomes longer and smaller.

Description

technical field [0001] The invention relates to a source driver and a display device. Background technique [0002] An active matrix driving method is adopted as a driving method of a display device including a display device such as a liquid crystal or an organic EL (Electro Luminescence). In a display device of an active matrix driving method, a display panel is composed of a semiconductor substrate in which pixel units and pixel switches are arranged in a matrix. The on-off of the pixel switch is controlled by the gate signal, and when the pixel switch is turned on, the gray-scale voltage signal corresponding to the video data signal is supplied to the pixel part, and the brightness of each pixel part is controlled, thereby displaying . A gate signal is supplied to the pixel switches by a gate driver via a scanning line (also referred to as a gate line). In addition, the supply of the gradation voltage signal to the pixel portion is performed by the source driver via t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/3233G09G3/3275
CPCG09G3/3688G09G3/3233G09G3/3275
Inventor 谷口直树土弘大野崇
Owner LAPIS SEMICON CO LTD