Reduction of silicon die size for a navigational sensor using ultra high frame rate acquisition

摘要

A navigation device having a small navigation sensor pixel array capable of ultra high speed imaging is proposed. A first image and a second image of a plurality of images are selected according to a predetermined difference between the corresponding acquisition times of the first image and the second image. The first image and the second image are compared to determine an amount of overlap between the first image and the second image. The predetermined difference is adjusted for subsequent image comparisons according to the amount of overlap between the first image and the second image.

主权项

1. An optical mouse comprising:
an image sensor; and a control circuit configured to receive images from the image sensor at a frame rate, the frame rate being high enough to obtain a predetermined overlap area between compared images when the optical mouse is moved at least 1.5 meters per second so that movement of the optical mouse can be determined according to the compared images, wherein the frame rate is 25,000 frames per second; wherein the image sensor is smaller than or equal to a 12 by 12 pixel array.