Optical anti-shake detection method and device

Abstract

The invention discloses an optical anti-shake detection method and device. The method comprises the following steps: acquiring a preset anti-shake angle and a gyro gain coefficient; according to the anti-shake angle and the gyro gain coefficient, determining a plurality of calibration stroke coordinates of the motor when the camera module compensates for the anti-shake angle; wherein the plurality of calibration stroke coordinates are circumferentially distributed around the initial coordinate of the motor stroke; driving the motor to act according to each calibrated stroke coordinate, and detecting the current stroke of the motor after the action is completed to obtain an actually measured stroke coordinate; the actually measured stroke coordinates are in one-to-one correspondence with the calibrated stroke coordinates; and determining test results of the motor and the position detection unit according to the calibrated stroke coordinates and the actually measured stroke coordinates. According to the method, the precision conditions of the motor and the position detection unit in different jitter directions can be more comprehensively tested in the IOS anti-jitter control process.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to an optical anti-shake detection method and device. Background technique [0002] In order to meet current users' requirements for shooting quality, OIS (Optical Image Stabilizer, Optical Image Stabilizer) anti-shake technology has been gradually popularized in most terminal devices. The function of optical anti-shake technology is to avoid blurring of the picture due to factors such as hand shaking when taking pictures, thereby improving the clarity of the image. Because OIS technology can compensate hand shake to a certain extent, it can extend the exposure time to a certain extent to increase the amount of light entering the camera module, so as to take brighter and more pure photos. This effect is more obvious in low-light environments. . The principle of OIS optical anti-shake technology is to add a lens that uses magnetic levitation to the lens group to work with the gyros...

AI Technical Summary

Problems solved by technology

Although the existing technology can realize the detection of OIS, due to the limitation of the vibration table, it is difficult to judge the directions other than the X and Y axes; therefore, in the directions other than the X and Y axes, that is, as figure 2 ( figure 2 Schematic diagram of the principle of OIS anti-shake test by taking a cross chart for the camera module, where A1 is the test result in a static state, B1 is the test result when the shake is turned off and OIS is turned off, and C1 is the test result when the shake is turned on and OIS is turned on) In the direction of the black area, it is difficult to detect and intercept the defects of the Hall sensor and the motor that performs the compensation action

[0003] To sum up, the existing technology can only detect the OIS performance in two vibration directions when performing OIS detection, which has great limitations.

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