Device and method for testing whether camera module is qualified

Abstract

The invention provides device and a method for testing whether a camera module is qualified or not. An optical signal generation module is arranged in a direction which a camera module plane faces; the optical signal generation module comprises a plurality of light emitting units which are arranged in a grid structure; and the plurality of the light emitting units are parallel to one another and spaced uniformly, and end parts of the light emitting units are flush with one another. During testing, a light emitting region formed by the light emitting units is parallel to a camera module light sensitive chip, and centers of the light emitting region and the camera module light sensitive chip are located on the same straight line; the light emitting units are parallel to a long side of the light sensitive chip; the plurality of the light emitting units are controlled to be switched on for one time; in the process, data of each pixel sensing signal of the light sensitive chip are collected, analyzed and processed, and a pitch angle of each pixel and a left inclined angle and a right inclined angle of the camera module are obtained; and finally, whether the camera module is qualified or not is judged according to a specified preset range. The method is used for testing whether the camera module is qualified or not, the position of the camera module is not required to be adjusted manually, the time spent in testing the camera module is greatly shortened, and the testing efficiency is improved.

Description

Technical field [0001] The invention relates to the technical field of camera modules, and more specifically, to a device and method for testing whether a camera module is qualified. Background technique [0002] The optical touch screen has the advantages of portability, high accuracy, and fast response speed. It can be used in conference venues, commercial display venues, education and training venues, exhibitions, financial industry, military and many fields. [0003] The core component of the optical touch screen is the camera module. The commonly used camera module in the optical touch screen is the linear camera module. The photosensitive chip plane of this camera module is rectangular, and the photosensitive chip has a row of pixels side by side along the long side. Different camera modules have different numbers of pixels. Ideally, this row of pixels is on the axis of symmetry along the long side of the photosensitive chip, so as to ensure that each pixel receives light wi...

AI Technical Summary

Problems solved by technology

[0007] Although the above methods can be used to test whether the camera modules are qualified, each camera module needs to be adjusted during the test, and the adjustment takes a long time. It takes no less than 1 minute to test each camera module, which is serious. Affected the test efficiency of the camera module

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