Optical navigation module

Abstract

An optical navigation module for receiving control from an object is provided. The optical navigation module includes a module surface above which the object is disposed; a light source located under the module surface and configured to project a first cone of light to the object along a first optical axis through a first optical construction; and a light sensor located under the module surface and configured to detect a second cone of light that is resulted from the first cone of light being reflected by the object along a second optical axis through a second optical construction, and thereby to collect a spatial intensity profile of the reflected light. The intersection of the first optical axis and the second optical axis is below the module surface.

Description

technical field [0001] The present invention relates to optical navigation devices, and more particularly, to a compact and desirable [0002] An optical navigation device with a small sensing range without sacrificing the sensitivity of the light sensor. Background technique [0003] Optical navigation devices are an essential component of consumer electronic products that require user input through a GUI (Graphical User Interface). Existing designs often set the light sensor to receive reflected light as much as possible without considering the sensing range. [0004] In many applications, however, the sensing range of an optical navigation device should be the primary consideration. In these cases, the sensing range must be limited to the available range. Currently, some electrical methods have been developed, such as reducing the sensing sensitivity, to limit the sensing range. Optical navigation devices, on the other hand, are desirably smaller in size, where the se...

AI Technical Summary

Problems solved by technology

At present, some electrical methods have been developed, such as reducing the sensing sensitivity, to limit the sensing range

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