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Driver and display device using the same

A driver and converter technology, used in instruments, static indicators, etc., can solve problems such as complex test circuits, and achieve the effects of avoiding characteristic degradation, increasing layout area, and suppressing the increase in chip size.

Inactive Publication Date: 2011-09-21
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the test circuit for testing the normal operation of a large number of DACs is very complex

Method used

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  • Driver and display device using the same
  • Driver and display device using the same
  • Driver and display device using the same

Examples

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Embodiment Construction

[0039] Hereinafter, a display device such as a TFT (Thin Film Transistor) type liquid crystal display device using a driver such as a data driver according to the present invention will be described in detail with reference to the accompanying drawings.

[0040] figure 2 The configuration of the display device 1 according to the embodiment of the present invention is shown. refer to figure 2 , the display device 1 according to the embodiment of the present invention is provided with a display panel 10 . The display panel 10 is provided with a plurality of pixels 11 arranged in a matrix. Each of the plurality of pixels 11 is provided with a thin film transistor (TFT) 12 . In the case of a liquid crystal display panel, the pixel 11 is further provided with a pixel capacitor 15 . The pixel capacitor 15 is provided with a pixel electrode, and an opposite electrode opposed to the pixel electrode. The TFT 12 has a drain electrode 13 , a source electrode 14 connected to a pixe...

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Abstract

The invention relates to a driver and a display device using the same. The driver includes a digital-to-analog converter configured to perform digital-to-analog conversion on digital gray scale data to output an analog output gray scale voltage; an output amplifier section having a first input connected with an output of the digital-to-analog converter, and an output connected with an output node, and a second input connected with the output of the output amplifier section through a negative feedback wiring, and configured to output the output gray scale voltage to the output node in response to a control signal in an operation mode. A test switch is connected between the first input and the second input in the output amplifier section and is configured to output the output gray scale voltage to the output node in response to a test signal in a test mode for a test of an output of the digital-to-analog converter.

Description

technical field [0001] The present invention relates to a driver or a data driver and a display device such as a TFT (Thin Film Transistor) type liquid crystal display device. Background technique [0002] TFT (Thin Film Transistor) type liquid crystal display devices have been widely used. The display device has a display panel such as an LCD (Liquid Crystal Display) panel, a gate driver, a plurality of data drivers. In the display panel, a plurality of gate lines is connected to a gate driver, and a plurality of data lines is connected to a plurality of data drivers. Each of the plurality of gate lines is connected to a gate electrode of a TFT of a row of pixels. Each of the plurality of data lines is connected to a drain electrode of a TFT of a column pixel. [0003] Each of the data drivers is provided with a shift register, a data register, a data latch circuit, a level shifter circuit, a digital / analog (D / A) converter, an output amplifier circuit, and a plurality of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36
CPCG09G3/3688G09G3/006G09G2310/027G09G2310/0289G09G3/3648
Inventor 円城启裕
Owner RENESAS ELECTRONICS CORP
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