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Display driver and semiconductor device

A display driver and display unit technology, applied to static indicators, instruments, etc., can solve problems such as larger chip area and larger scale of display driver

Active Publication Date: 2018-10-26
LAPIS SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Therefore, in the display driver, it is necessary to provide three systems of gradation voltage generation circuits (including registers, ladder resistors, and amplifiers) corresponding to each color. Therefore, there is a problem that the chip area occupied by the gradation voltage generation circuits increases and the The size of the display drive becomes larger accordingly for such problems

Method used

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  • Display driver and semiconductor device
  • Display driver and semiconductor device
  • Display driver and semiconductor device

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Embodiment Construction

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0030] figure 1 It is a block diagram showing a schematic configuration of a display device 100 including a display driver of the present invention. exist figure 1 Among them, the display driver 20 is composed of, for example, a liquid crystal display panel, and has m (m is a natural number greater than or equal to 2) horizontal display lines S extending in the horizontal direction of the two-dimensional screen. 1 ~S m , and n (n is an even number greater than 2) data lines D extending in the vertical direction of the two-dimensional screen 1 ~D n . A display unit C for red display is formed at each intersection of the horizontal display line and the data line R , a display unit C for green display G , or display unit C for blue display B .

[0031] Furthermore, in the display driver 20, such as figure 1 As shown in the horizontal display line S 1 w...

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Abstract

The present invention relates to a display driver and a semiconductor device. It is an object of the invention to provide a display driver capable of achieving a small scale and a semiconductor devicein which the display driver is formed. The display driver is provided with a gamma correction data sending portion that feeds a plurality of gamma correction data pieces one by one for each predetermined period, and based on the gamma correction data pieces sent based on the gamma correction data sending portion. The gamma characteristic converts the luminance level represented by the video signal into a gray voltage.

Description

technical field [0001] The present invention relates to a display driver for driving a display panel and a semiconductor device in which the display driver is formed. Background technique [0002] A display driver that drives a display panel such as a liquid crystal display panel or an organic EL display panel generates a gradation voltage corresponding to each error luminance level indicated by an input video signal, and supplies the gradation voltage to the display panel as a pixel driving voltage. Each of the source lines is applied. In addition, the display driver performs gamma correction for correcting the correspondence relationship between the luminance indicated by the input video signal and the luminance actually displayed on the display panel for each of red, green, and blue. [0003] As a display driver that performs such gamma correction, a display driver including three systems of grayscale voltage generation circuits has been proposed (for example, refer to P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/3266G09G3/3291
CPCG09G3/3266G09G3/3291G09G3/3674G09G3/3685G09G3/3696G09G2320/0276
Inventor 山崎厚司平间厚志
Owner LAPIS SEMICON CO LTD