Patent ID: 7630622
Filing Date: 2009-12-08
Classification: G02B,G03B,H04N

Abstract:
1. An automatic focusing method, implemented in an image capture device comprising a lens and a sensor module, wherein the relative positions of lens and the sensor module are adjustable for automatic focusing based on a factor regarding the relative positions of components of the image capture device, comprising: adjusting the relative positions of the lens and the sensor module based on a first unit of the factor to determine a plurality of states of the lens and the sensor module, where the lens renders clearer images on the sensor module, and wherein the adjusting step comprises: utilizing the determined states to estimate a best state achievable by focus adjustment based on a second unit of the factor, comprising: where the lens renders a clearest image on the sensor module, wherein the second unit is finer than the first unit, wherein the determined states comprise three states where the lens renders clearer images on the sensor module, the lens comprises groups of lenses, and the factor is the position of a focusing group, the three states comprise a first position P when the former position P and the clarity value M driving the lens and the sensor module to the best state.