FPGA-based liquid crystal module touch screen testing device and method

Abstract

The invention discloses an FPGA-based liquid crystal module touch screen testing device and method. The testing device comprises a processor, a communication control unit, a picture acquiring unit, avideo generation unit and a trajectory processing unit which are embedded in an FPGA; and a picture acquiring unit reads test pictures from a memory according to a test start instruction received by the processor from a host computer; the video generation unit generates a video timing sequence adapted to a liquid crystal module to be tested, and outputs the test pictures according to video timing;the communication control unit reads, according to interrupt signals sent out by the touch screen, coordinate values generated by a touch screen after scribed lines formed according to contours of the test pictures are received; and the trajectory processing unit generates a continuous pressing trajectory according to the coordinate values, and determines whether the pressing trajectory is normalaccording to a judgment strategy pre-configured by the processor. The system structure is simple, the number of interactions between systems is reduced, a communication link is shortened, the signaltransmission speed is fast, and the production line test efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of display technology, and more specifically relates to an FPGA-based liquid crystal module touch screen testing device and method. Background technique [0002] The touch screen (Touch Panel, TP), as an inductive liquid crystal display device that can receive contact input signals, is a widely used human-computer interaction method; liquid crystal module (Liquid Crystal Display Module, LCM) manufacturers to During R&D and production of liquid crystal modules, it is necessary to quickly and efficiently test the liquid crystal module TP in order to improve the production efficiency of the liquid crystal module production line. [0003] The traditional test device uses a special TP test board to communicate with the touch chip in the liquid crystal module TP and collect coordinates; before the test, the PC controls the graphic signal generator to output a specific test image to the liquid crystal module (such as field ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides an FPGA-based liquid crystal module touch screen testing device and method, which can simplify the system architecture and improve testing efficiency, and its purpose is to solve the existing test device system structure Complexity, high test cost, poor real-time performance, and low test efficiency

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