Display device and display driver

A display driver and display device technology, applied to static indicators, instruments, etc., can solve problems such as poor image quality and poor brightness of display panels, and achieve the effects of suppressing output voltage deviation and high anti-noise performance

Active Publication Date: 2015-04-29
SYNAPTICS JAPAN GK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, since there is a difference in the brightness of the display panel when there is a deviation in the output voltage among the plurality of display drivers, there is a problem that the image quality deteriorates

Method used

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  • Display device and display driver
  • Display device and display driver
  • Display device and display driver

Examples

Experimental program
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Embodiment approach 1

[0207] [Embodiment 1]

[0208] figure 1 It is a block diagram showing a configuration example of the display device 100 of the present invention.

[0209] The display device 100 has a first display driver 1 capable of outputting grayscale signals to a plurality of source lines 91_1 of the display panel 90 based on display data, and a first display driver 1 capable of outputting gray scale signals to other plurality of source lines 91_2 of the same display panel 90 based on display data. The display device 100 is configured as follows.

[0210]The first display driver 1 and the second display driver 2 include source line driving sections 20_1 and 20_2 , gray scale voltage generating sections 21_1 and 21_2 , and control circuits 9_1 and 9_2 , respectively. Besides, a circuit for driving the gate lines of the display panel and an interface circuit with the main processor may also be included. Outputs of the source line driving sections 20_1 and 20_2 are electrically connecte...

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Abstract

The display device includes display drivers including first and second ones operable to output, based on display data, gradation signals to source lines of display panel regions. The display device is arranged to be able to suppress the variation in output voltage between display drivers while minimizing the increases in chip area of the display drivers and in wiring area of a display panel and keeping high noise resistance. Each display driver can generate gray scale reference voltages for producing gradation signals corresponding to display data. The first display driver can sequentially transmit gray scale reference voltages generated by itself to the second display driver. Based on the transmitted gray scale reference voltages, the second display driver makes the first display driver execute calibration for decreasing the absolute value of difference between gray scale reference voltages generated by the first and second display drivers, or executes the calibration by itself.

Description

technical field [0001] The present invention relates to a display device and a display driver mounted on the display device, and is particularly applicable to a display device that realizes high-quality display using a plurality of display driver ICs (Integrated Circuits). Background technique [0002] In recent years, displays have been increasing in resolution and size. With the development of high resolution and large size, it becomes difficult to drive with a single-chip display driver, and multi-chip (multi_chip) has been developed. At this time, since there is a difference in luminance of the display panel when there is a deviation in output voltage among a plurality of display drivers, there is a problem that image quality deteriorates. [0003] Patent Document 1 discloses a technique for preventing degradation of display quality of a liquid crystal display device in which a plurality of drive circuit components cooperate to drive one display region. Gradation refer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/20G09G3/3688G09G3/3696G09G2310/0221G09G2320/0276G09G2320/0693
Inventor 引地利行黑川康人市川修太郎高田雅史
Owner SYNAPTICS JAPAN GK
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