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Data driver, display panel driving device, and display device

A data driver and output circuit technology, applied in the direction of instruments, semiconductor devices, static indicators, etc., can solve problems such as operation failure

Inactive Publication Date: 2013-06-12
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low voltage of the circuit power supply can easily cause operational failure due to electrical noise

Method used

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  • Data driver, display panel driving device, and display device
  • Data driver, display panel driving device, and display device
  • Data driver, display panel driving device, and display device

Examples

Experimental program
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no. 1 example

[0049] The configuration of the display device according to the first embodiment of the present invention will be described below. Figure 8 is a block diagram showing an example of the configuration of the display device according to the first embodiment of the present invention. The display device 50 is a thin film transistor (TFT) type liquid crystal display device. The display device 50 includes a display unit (liquid crystal display panel) 60 , a gate driver 70 , a plurality of data drivers 1 , and a timing controller 52 .

[0050] The display unit (liquid crystal display panel) 60 is a liquid crystal display (LCD) module. The display unit 60 includes a plurality of gate lines 67 , a plurality of data lines 68 and a plurality of pixels 61 . The gate lines 67 extend in the X direction. The data line 68 extends in the Y direction. The pixels 61 are arranged in a matrix corresponding to points where the gate lines 67 and the data lines 68 intersect. The pixel 61 include...

no. 2 example

[0091] The configuration of a display device and a data driver according to a second embodiment of the present invention will be described below. In this embodiment, the delay circuit in the data driver is different from that in the first embodiment. The following description focuses primarily on this difference.

[0092] Figure 15 is a block diagram showing an example of the configuration of the data driver of the display device according to the second embodiment of the present invention. In the data driver 1 according to the first embodiment, the delay circuit is broadly divided into three sections (delay circuits 6 , 7 and 8 ) based on the load of the signal line 12 . On the other hand, in the data driver 1a according to the second embodiment, the delay time of the delay circuit is gradually changed according to the gradual change in the length of the signal line 12 of the amplifier circuit 3 . This will be described in detail below.

[0093] The amplifier circuit driv...

no. 3 example

[0106] The configuration of a display device and a data driver according to a third embodiment of the present invention will be described below. In this embodiment, the delay circuit of the data driver is different from that in the first embodiment. The following description will mainly focus on this difference.

[0107] Figure 16 is a block diagram showing an example of a configuration of a data driver of a display device according to a third embodiment of the present invention. In the data driver 1 according to the first embodiment, the delay circuits are broadly divided into three groups based on the load of the signal line 12 in which the delay time gradually decreases (from large delay to medium delay, and to small delay). On the other hand, the data driver 1b according to the third embodiment further includes a delay circuit after a specific delay circuit group so as to increase the delay time again (after a small delay to an increasing delay or a large delay). This ...

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PUM

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Abstract

The present disclosure provides a data driver, a display panel driving device, and a display device. To reduce current noise by reducing the current peak value and the current rise slope, a data driver includes a delay unit and a plurality of output circuits. The delay unit sequentially delays a control signal and outputs delay control signals. The output circuits start outputting in response to the delay control signals. The delay unit generates the delay control signals to be output to the output circuits.

Description

[0001] Cross References to Related Applications [0002] The disclosure of Japanese Patent Application No. 2011-266865 filed on December 6, 2011 including specification, drawings and abstract is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a data driver, a display panel driving device and a display device. Background technique [0004] A liquid crystal display (LCD) panel of the active matrix type is known. The liquid crystal display panel includes scanning (gate) lines arranged in parallel along the row direction, data lines arranged in parallel along the column direction, pixels arranged at the intersections of the scanning lines and data lines, and each pixel Active components (for example, thin-film transistors (TFTs)) inside. When the active element is a TFT, the scan line is coupled to the gate electrode. Then, the data line is coupled with the drain electrode. One end of the liquid crystal capacitor as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20H01L21/822H01L27/04H03K5/13
CPCG09G3/3688G09G2300/0426G09G2310/0291G09G2310/08G09G2320/0223G09G2330/025H03K5/1506H03K5/15G09G5/00G09G3/36G09G2310/067
Inventor 涩谷昌树
Owner RENESAS ELECTRONICS CORP
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