Research On Defect Detection Equipment Of Liquid Crystal Module Based On Zynq

In the field of liquid crystal display production,due to the limitations of the production process,the produced liquid crystal display has irregular brightness and color unevenness during display.In order to stabilize the display effect,it is necessary to detect and compensate the uneven display of the liquid crystal display during the production process of the liquid crystal module.This compensation process is called De-mura in the field of liquid crystal display production.At present,the equipment in the mainstream De-mura system is mainly composed of a computer,a video signal generator,and a camera.In the current De-mrua system,due to the difference equipment manufacturers,the phenomenon of incompatibility between equipments and the defects in the equipment itself cause the time cost of the De-mura process to increase.This phenomenon leads to a greater impact on the overall production efficiency of the LCD screen in actual production.In order to solve the current problem of increased system runtime cost caused by the asynchronized operation of the equipment and the defects in the equipment,this paper mainly carries out the following research:1.By analyzing the operation process and operation time of the existing De-mura system,it is explained that the image switching detection in the operation process and the denoising of multiple images are the main reasons for the increase of the operation time cost of the De-mura system.Therefore,the overall design of the new equipment is proposed: the new equipment hardware system adds a synchronous trigger circuit and an image filter circuit on the basis of the hardware that provides the functions of the original equipment;The software system combines the control of image acquisition and image display.Finally expounds the feasibility of Zynq as a new equipment development platform,and proposes a design plan of equipment hardware and software system based on Zynq.2.According to the proposed Zynq-based device hardware system design plan for specific implementation.The equipment hardware system consists of an image acquisition system,a video signal output system,and a sensor driver module.The image acquisitionsystem implements image data acquisition and image data decoding.The video signal output system implements image filtering and switching synchronous triggering.The sensor driver module implements Sensor power management and sensor parameter configuration.First of all,the functional module implementation method of each system is designed and the actual logic circuit structure is implemented.Finally,the completed design is subjected to functional simulation and static timing analysis to verify that the design meets the design requirements.3.According to the proposed Zynq-based device software system design plan for specific design.The host computer control software is designed and realized by the main control program,data transmission program,and image receiving program.The lower computer control software is designed and realized by the main control program,SD card file system management program,sensor driver program,image display and image acquisition hardware control program.4.Carry out testing and result analysis on the completed hardware system and software system.The test content includes the construction of the test platform,the function test of the device image display and image acquisition,the performance test of the running time calculation when the new device runs De-mura,and finally the research results are analyzed and get the final conclusions.The defect detection equipment implemented in this paper is based on the completion of the image data collection function and the video signal output function.The device hardware synchronizes the image acquisition and video signal output through the synchronous trigger module,and realizes the average denoising process of multiple images inside the device through the image filter module.The device software integrates image display and image acquisition software control.Compared with the original equipment,the new equipment saves6.3 seconds when running the De-mura system,which greatly reduces the system running time.Compared with the original equipment,the operating efficiency is increased by 28%.It has important application value in the field of LCD production inspection...