Patent ID: 7391412
Filing Date: 2008-06-24
Classification: G06F

Abstract:
1. An optical mouse with shade compensation, comprising: a light source, which illuminates a sampling plane of a mouse; a sensitive extractor, which consists of a 2-dimensional array of sensors to capture an image from the sampling plane and temporarily store the image into a 2-dimensional array of pixel values; and a controller, which is connected to the sensitive extractor for adjusting values of the pixel values in accordance with a predetermined compensation table, thereby achieving desired shade compensation for the sensors; wherein the predetermined compensation table consists of a 2-dimensional array of compensation factors Fn, and the compensation factors Fn are proportional to sensitivities of the sensors and equal to M/(Wn−B), where Wn is a 2-dimensional array of pixel values obtained by sensing a white sampling plane, B is a predetermined value, M is the maximum difference between Wn and B, and n is an integer to indicate a pixel index.