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Touch screen sensor testing circuit

A technology for testing circuits and sensors, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of not having too much reference significance, the accuracy of the money migration test is not high, and achieving the effect of simple operability

Active Publication Date: 2015-12-16
CHANGSHA YUSHUN DISPLAY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a touch screen sensor test circuit, which aims to solve the problem that the accuracy of the silver migration test is not high, and the experimental results do not have too much reference significance

Method used

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Embodiment Construction

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by 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.

[0030] see figure 1 and figure 2 , the touch screen sensor test circuit in the preferred embodiment of the present invention is connected to the DC voltage VPP. The touch screen sensor test circuit includes a first interface 101, a second interface 102, a combination switch 103, a voltage comparison module 104, a self-excited oscillation module 105, and an indication module 106, and the first interface 101 and the second interface 102 sense the touch screen respectively. The odd-numbered silver paste leads 11 and the even-numbered silver paste leads 12 on the de...

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Abstract

A touch screen sensor testing circuit is connected with a DC voltage, and comprises a first interface, a second interface, a self-excited oscillation module, a combined switch, a voltage comparison module and an indicating module, wherein the first interface is used for connecting an odd number of silver paste lead wires on a touch screen sensor to the combined switch, the second interface is used for connecting an even number of silver paste lead wires on the touch screen sensor to the combined switch, and the self-excited oscillation module converts the DC voltage into an AC voltage and inputs the AC voltage to the combined switch; and the combined switch applies the AC voltage or the DC voltage to the touch screen sensor for detection through the first interface and the second interface and then outputs detection voltages to the voltage comparison module for comparison, and an indication whether silver paste migration occurs in silver paste circuits is represented via the comparative result. The touch screen sensor testing circuit can test silver ion migration status between the adjacent circuits on the touch screen sensor accurately, adjusts testing electrical conditions, is high in flexibility, only needs two lead wires for wiring, and has the advantages of being simple, being high in operability and the like.

Description

technical field [0001] The invention relates to power electronics technology, in particular to a touch screen sensor test circuit. Background technique [0002] Both the resistive touch screen and the capacitive touch screen have conductive lines on the sensors. The commonly used materials for the conductive lines are: transparent ITO (indium tin oxide), silver paste, molybdenum, aluminum molybdenum, etc. Silver paste is often used for edge leads on touch screen sensors due to its low cost, good electrical conductivity, high adhesion to substrates, easy patterning, and high stability. However, when applying silver paste lines, due to the inherent characteristics of silver paste lines, silver ion migration is easy to occur after the silver paste lines are energized, and silver ion migration occurs during the application process, causing short circuits in the lines and resulting in product failure. [0003] At present, in order to test the stability of the silver paste circui...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 黄效牛杨顺林李浩王林
Owner CHANGSHA YUSHUN DISPLAY TECH
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