Device for testing autofocus function and method for using device
US11323609B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Apr 14, 2020 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Sep 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for testing an autofocus function of a camera module fixes a camera module and at least two test members sequentially spaced at different positions on an axis pointing straight away from the camera. The camera module is controlled to focus and capture images of each test member and record driving currents of the camera module to achieve those focuses at those distances. When a sharpness of image of a test member reaches a preset threshold value a correspondence table between the driving currents and object distances is generated. An autofocus testing device is further provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.