Kane Luo, European sales manager at HIKrobotics, explains how the company’s 151MP camera has impacted on FPD inspection.
In order to save labour costs and reduce mistakes caused by human inspection, machine vision is widely introduced in various industrial applications, among which flat panel display (FPD) inspection has always been a very important field where machine vision solution is applied a lot.
In recent decades, the evolution of the display technology is more prosperous than ever, from CRT to LCD, then to OLED and the up-coming flexible OLED, the display technology is progressing with each passing day. The amazing evolution speed of the displays reflects the increasing requirement of FPD industry on quality inspection. In this context, the industrial camera with higher resolution is able to reduce the duration of work cycle and the complexity of the MV system platform, thus to reduce cost and increase the inspection efficiency.
151MP CXP Area Scan Camera
In response to demand, Hikrobot has developed MV-CH1510-10XM (see image) which features 151MP ultra-high resolution and large data transmission bandwidth with CoaXPress interface, contributing to high-efficiency FPD inspection without missing a single defect.
MV-CH1510-10XM is equipped with Sony IMX411 back-illuminated RS CMOS Sensor. It has 3.76μm pixel size, 14192*10640 resolution and square pixel array, which allows a perfect reproduction of every detail of the inspected object. Additionally, the SLVS-EC (Scalable Low Voltage Signaling Embedded Clock) technology together with the CXP data interface realises a high frame rate up to 6.2 fps.
With the help of the ultra-high resolution above all, and a relatively high frame rate, MV-CH1510-10XM distinguishes itself in many industrial inspection applications, such as LCD/OLED display inspection and PCB AOI inspection.
TFT-LCD 4K TV FPD Inspection
TFT-LCD 4K TV FPD inspection is a typical application where the 151MP camera embodies its value. In terms of image handling, the 4K TV FPD inspection based on MV AOI system can be divided into following steps:
- Capture image
- Extract screen area
- Eliminate Moiré effect
- Image enhancement & Defect detection
In order to apply the AOI system based on MV, the precondition is to meet the defect inspection algorithms’ requirement, which is majorly the requirement on image resolution of the inspected object. To be more precise, every pixel on the TV screen should be at least mapped into nine pixels in the captured image (MR=3) in order to ease the subsequent image handling algorithms. That is to say, a normal 55-inch 4K TV, which has 3840*2160 resolution, requires at least 11520*6480 (75MP) resolution image.
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