OTP light source automatic calibration method and system for mobile phone module detection

Abstract

The invention discloses an OTP light source automatic calibration method and system for mobile phone module detection, and the method comprises the steps: S10, enabling a light source controller to beconnected with a standard light source plate, and enabling the standard light source plate to be provided with n-1 white light lamp beads; wherein each layer of white light lamp beads is different incolor temperature section, each layer of white light lamp beads comprises white light lamp beads with at least two color temperatures, and the standard light source plate is further provided with a layer of red light and green light lamp beads; setting a pre-calibrated color coordinate on the light source controller, and converting the color coordinate into a color temperature which is compared with the color temperature range of n-1 layers of white light lamp beads of the standard light source plate to obtain which layer of white light lamp beads of the standard light source plate emit light; using a red light or green light lamp bead for compensation for judgment; determining an approximate color coordinate point through calculation; and adjusting the PWM value of each lamp bead throughnegative feedback, so that the approximate color coordinate point is continuously close to the target point until the error reaches the preset precision. The method is high in precision, simple and convenient to operate and high in calibration speed.

Description

Technical field [0001] The invention belongs to the technical field of light source calibration, and relates to an OTP light source automatic calibration method and system for mobile phone module detection. Background technique [0002] As one of the key components in machine vision applications, the light source has a performance index that can have a huge impact on the imaging quality and application effect. At present, people are increasingly pursuing the camera performance of mobile phones. Mainstream models are often equipped with dual-camera or even triple-camera modules. Module manufacturers need to test each camera before leaving the factory. In order to ensure the accuracy of detection, module manufacturers The performance parameters of the light source have very high requirements. [0003] Since there are many types of mobile phone cameras, the required light source parameters need to be adjusted accordingly and cannot be shared. Therefore, the light source for mobile ph...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the color temperature of the light source deviates after being used for a period of time, the present invention provides an automatic calibration method and system for an OTP light source for mobile phone module detection, which has the characteristics of high precision, easy operation, and fast calibration speed

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