Method for testing optical image stabilization performance of camera driving motor

Abstract

The invention provides a method for testing the optical image stabilization performance of a camera driving motor, and the method comprises the following steps: enabling the camera driving motor to beinstalled on a testing tool, and enabling the camera driving motor to be electrically connected with an X-direction displacement monitoring module, a Y-direction displacement monitoring module and anOIS driving module; starting the OIS driving module so as to enable the camera driving motor and the OIS driving module to form an OIS closed-loop control system; starting an X-direction displacementmonitoring module and a Y-direction displacement monitoring module to obtain X-direction initial position data and Y-direction initial position data of a camera driving motor; starting a shaking table; obtaining real-time X-direction and Y-direction displacement data of a camera driving motor through an X-direction displacement monitoring module and a Y-direction displacement monitoring module; and enabling the upper computer to analyze the X-direction data and the Y-direction data to judge whether the OIS performance reaches the standard or not. Compared with the prior art, the method for testing the optical image stabilization performance of the camera driving motor is good in reliability, the production efficiency is effectively improved, and the production cost and the reject ratio risk are reduced.

Description

technical field [0001] The invention relates to a test method, in particular to a test method for optical image stabilization performance of a camera driving motor used in the field of portable camera electronic products. Background technique [0002] In recent years, micro-motor control systems with OIS (Optical Image Stabilization) functions have been adopted by many high-end mobile phone camera modules. In order to ensure that the camera module has excellent OIS performance, the camera module factory usually tests the actual imaging effect of the camera module sample on the shaking table before shipment, and uses the calculated SR (Suppression Ratio, suppression Ratio) parameters are used as the criterion for judging the performance of OIS. This evaluation method needs to install the camera module and gyroscope on the signal conversion module and fix them together on the shaker table, and only after the camera module is fully assembled, it can be taken with normal power ...

AI Technical Summary

Problems solved by technology

This evaluation method needs to install the camera module and gyroscope on the signal conversion module and fix them together on the shaker table, and only after the camera module is fully assembled, it can be taken with normal power on and image analysis can be carried out smoothly. However, it is impossible to evaluate the OIS performance of the camera drive motor (motor unit) in the camera module at the stage of incoming materials. At this time, once the OIS performance of the camera drive motor does not meet the standard, the assembled camera module samples will be scrapped , which increases the risk that the production yield rate does not meet the standard; at the same time, reassembly after rework and debugging of OIS control parameters will also result in low production efficiency and increased production costs

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