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Repair operational amplifier circuit and operating method thereof

一种运算放大器、修线的技术，应用在放大器、差分放大器、直流耦合的直流放大器等方向，能够解决寄生电容麻烦、不同、液晶显示面板显示画面错误等问题，达到降低修线失败的机率的效果

Active Publication Date: 2015-01-14
RAYDIUM SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the locations of wire breakages (such as P1 and P2) may be different each time, the wire repairing paths of the wire repairing operational amplifiers ROP1 and ROP2 in the wire repairing operational amplifier circuit 1 will also be different, and the wire repairing The parasitic resistance and parasitic capacitance encountered in the wire path may also be different, resulting in inconsistent speed of signal transmission (such as figure 2 As shown), the probability of line repair operation amplifier line repair failure is also increased, making errors occur when the LCD panel displays the picture
The above effect is more troublesome with the change of parasitic capacitance, because the change of parasitic resistance can be overcome by increasing the wire diameter of the repair line, but the change of parasitic capacitance cannot be overcome by this method

Method used

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  • Repair operational amplifier circuit and operating method thereof
  • Repair operational amplifier circuit and operating method thereof
  • Repair operational amplifier circuit and operating method thereof

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Embodiment Construction

[0035] A preferred embodiment of the present invention is a line trimming operational amplifier circuit. In this embodiment, the trimming operational amplifier circuit includes at least one set of trimming operational amplifiers and voltage slew rate gain modules for trimming at least one disconnected position of the liquid crystal display panel, so as to prevent the liquid crystal display panel from displaying images. An error occurred.

[0036] Please refer to image 3 , image 3 It is a schematic diagram of the line-correction operational amplifier circuit according to the present embodiment to perform line-correction on two different disconnection positions of the liquid crystal display panel. Such as image 3 As shown, the trimming operational amplifier circuit 3 includes a first group of trimming operational amplifier ROP1 and voltage slew rate gain module SRE1 and a second group of trimming operational amplifier ROP2 and voltage slew rate gain module SRE2, which are ...

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Abstract

A repair operational amplifier circuit including a repair operational amplifier and a slew rate enhancing module. The repair operational amplifier includes an input terminal and an output terminal. The input terminal is used to receive an input signal. The output terminal is used to output an output signal. The slew rate enhancing module is coupled to the input terminal and the output terminal of the repair operational amplifier and used to selectively control the repair operational amplifier to increase a slew rate of the output signal according to whether the slew rate of the output signal is smaller than a default slew rate.

Description

technical field [0001] The present invention is related to a Repair Operational Amplifier (ROA) circuit, in particular to a Repair Operational Amplifier circuit applied to a liquid crystal display panel and an operation method thereof. Background technique [0002] With continuous advancement of liquid crystal display technology, liquid crystal displays have been widely used in various fields. Such as figure 1 As shown, when the liquid crystal display panel LCP displays a picture, a certain line may be broken so that the signal cannot be transmitted. At this time, the liquid crystal display panel LCP needs to use the line repairing operational amplifier circuit 1 to repair it. However, since the locations of wire breakages (such as P1 and P2) may be different each time, the wire repairing paths of the wire repairing operational amplifiers ROP1 and ROP2 in the wire repairing operational amplifier circuit 1 will also be different, and the wire repairing The parasitic resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45H03F1/02
CPCH03F3/45071H03F2203/45248H03F3/45475G02F1/136259G02F1/136263
Inventor 林柏成罗友龙
Owner RAYDIUM SEMICON
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