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Circuit board, display device and liquid crystal display device

A circuit substrate and circuit technology, applied in identification devices, printed circuit components, optics, etc., can solve problems such as aluminum film corrosion

Inactive Publication Date: 2010-03-24
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In conventional display devices, low-resistance aluminum is used as the wiring inside the panel. If the wiring is extended to the outside of the panel and used as an external connection terminal, the aluminum film may corrode.

Method used

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  • Circuit board, display device and liquid crystal display device
  • Circuit board, display device and liquid crystal display device
  • Circuit board, display device and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0131] Picture 1-1 It is a plan schematic view showing the structure of the circuit board according to Embodiment 1.

[0132] Such as Picture 1-1 As shown, the external connection terminal 120 has a form in which the circuit region 50 and the peripheral wiring region 60 are provided in a layer below the external connection terminal 120 , so that the area of ​​the display region 70 can be increased. The "circuit area" is an area where circuit structural wires constituting the circuit are densely arranged, and the "peripheral wiring area" is an area where peripheral wires that transmit signals from external connection terminals to the drive circuit are densely arranged.

[0133] A pixel electrode composed of a reflective electrode and a transparent electrode is arranged in the display region 70 . also, Figure 1-2 In the circuit board according to Embodiment 1, it represents Picture 1-1 An enlarged schematic plan view of the arrangement relationship between the peripheral...

Embodiment approach 2

[0176] figure 2 It is a schematic cross-sectional view showing the structure around the external connection terminals of the circuit board according to the second embodiment.

[0177] In the circuit board according to the second embodiment, the structure of the layer below the gate electrode is the same as that of the first embodiment, such as figure 2 As shown, an undercoat film 11 , a semiconductor layer 12 , a gate insulating film 13 , and a gate electrode 14 formed on a substrate 10 are arranged. A first interlayer insulating film 217 and a second interlayer insulating film 218 are disposed on the gate electrode 14 . Source / drain electrodes 215 are arranged on the second interlayer insulating film 218 . The source / drain electrodes 215 are connected to the semiconductor layer 12 through contact holes formed in the gate insulating film 13 , the first interlayer insulating film 217 , and the second interlayer insulating film 218 .

[0178] A third interlayer insulating fil...

Embodiment approach 3

[0180] image 3 It is a cross-sectional schematic view showing the structure around the external connection terminals of the circuit board according to Embodiment 3.

[0181] The circuit board according to Embodiment 3 is the same as Embodiment 2 with respect to the structure of layers below the gate / drain electrodes 315 . Such as image 3 As shown, an undercoat film 11, a semiconductor layer 12, a gate insulating film 13, a gate electrode 14, a first interlayer insulating film 317, a second interlayer insulating film 318, and a source electrode formed on a substrate 10 are sequentially arranged. / drain electrode 315 . A third interlayer insulating film 319 made of silicon nitride is formed on the source / drain electrodes 315 , and a peripheral wiring 316 b and a power supply wiring 324 are provided on the third interlayer insulating film 319 . The fourth interlayer insulating film 323 and the external connection terminal 320 are sequentially provided on the peripheral wirin...

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PUM

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Abstract

Provided is a monolithic circuit board, which has, on a substrate, a driver circuit for driving a pixel, and an external connecting terminal for supplying the driver circuit with signals and power for driving the circuit from the external, and has a reduced frame area. A display device and a liquid crystal display device provided with the circuit board are also provided. In the circuit board, thedriver circuit for driving the pixel and the external connecting terminal are arranged on the substrate. The circuit board has wiring arranged on a lower layer of an external connecting terminal.

Description

technical field [0001] The invention relates to a circuit substrate, a display device and a liquid crystal display device. More specifically, it relates to a circuit board suitable for mobile devices such as mobile phones, and a display device and a liquid crystal display device including the circuit board. Background technique [0002] In recent years, portable electronic devices such as mobile phones and PDAs equipped with liquid crystal display devices, organic electroluminescent display devices, and the like have been required to further reduce their size and weight. Along with this, there is a tendency to achieve miniaturization around the display area, that is, a narrower frame, and development is promoted. In addition, display devices provided with a full monolithic circuit substrate in which peripheral circuits required for driving such as a driver circuit are formed on a substrate tend to increase in order to realize thinning and cost reduction. In a display devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1345G02F1/1368G09F9/30H05K1/02
CPCG02F1/13452G02F1/1345G02F1/133G02F1/13454G02F1/1347
Inventor 森胁弘幸
Owner SHARP KK
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