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Current monitoring circuit, graphic signal generator and panel detection system

A technology of current monitoring and current path, which is applied in the direction of measuring current/voltage, measuring only current, testing a single semiconductor device, etc. It can solve the problems that the current detection requirements of small and medium-sized panels cannot be met, and achieve the optimization of over-current protection circuit for cut-off, The effect of fast sampling speed and cost reduction

Pending Publication Date: 2020-11-27
WUHAN JINGLI ELECTRONICS TECH +1
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Problems solved by technology

The existing current monitoring system is increasingly unable to meet the current detection requirements of small and medium-sized panels

Method used

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  • Current monitoring circuit, graphic signal generator and panel detection system
  • Current monitoring circuit, graphic signal generator and panel detection system

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0020] Such as figure 1 As shown, taking the OLED screen as an example, in some application scenarios, 9 independent power supplies are required when testing the OLED screen, and the 9-way power supply is composed of 7 positive voltages and 2 negative voltages. When the 7-way positive voltage current is working normally, the current direction is from the power supply to the display module, and ...

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Abstract

The invention discloses a current monitoring circuit, a graphic signal generator and a panel detection system. The current monitoring circuit comprises a plurality of signal acquisition modules arranged on a plurality of current paths and used for realizing sampling of electric signals, a channel selection module electrically connected with the plurality of signal acquisition modules and used forswitching sampling channels, an analog-to-digital conversion module electrically connected with the output terminal of the channel selection module and used for converting an analog signal into a digital signal for the sampling signal, and a control module used for controlling the channel selection module and the analog-to-digital conversion module and outputting a current monitoring result. Whilethe sampling precision is ensured, the current sampling range is large, the sampling speed is high, the reliability is high, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of display panels, and more specifically relates to a current monitoring circuit, a graphic signal generator and a panel detection system. Background technique [0002] In the production test of the display panel, it is necessary to detect the current signal of the display panel. With the development of small and medium display panel technology, the refresh rate of the display panel has been continuously improved, from the previous 60HZ / 50hz to 120hz, and the resolution has also been increased from the previous 720p to 8k. Therefore, small and medium-sized display panels have higher requirements on the range, speed and reliability of current detection. The existing current monitoring system is increasingly unable to meet the current detection requirements of small and medium-sized panels. Contents of the invention [0003] Aiming at at least one defect or improvement requirement of the prior art, the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26G01R19/00G09G3/00
CPCG01R31/26G01R19/0092G09G3/006
Inventor 刘中福吴磊戢运清叶金平雷新军
Owner WUHAN JINGLI ELECTRONICS TECH
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