Optical pointing device and corresponding method for concurrently performing gain control and image capturing for navigation of optical pointing device during one LED turned-on time period

摘要

An optical pointing device includes a light emitting unit, a pixel array, a gain controlling circuit, and a processing circuit. The light emitting unit is used for emitting light to a surface. The pixel array is used for sensing the light reflected from a surface to generate at least one sense resultant signal. The gain controlling circuit is used for controlling a gain value for the at least one sense resultant signal, to avoid signal saturation. The processing circuit is used for performing image capturing for a navigation of the optical pointing device. The gain controlling circuit and the processing circuit concurrently control the gain value and perform the image capturing for the navigation of the optical pointing device.

主权项

1. An optical pointing device, comprising:
a light emitting unit, for emitting light to a surface; a pixel array, for sensing the light reflected from a surface to generate at least one sense resultant signal; a gain controlling circuit, coupled to the pixel array, for controlling a gain value for the at least one sense resultant signal; and a processing circuit, coupled to the gain controlling circuit, for performing image capturing for a navigation of the optical pointing device based on the gain value; wherein the gain controlling circuit and the processing circuit concurrently control the gain value and perform the image capturing for the navigation of the optical pointing device.