Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical displacement detection device and method

A detection device and displacement technology, which is applied in the field of optical displacement detection, can solve the problems of easy errors in displacement calculation, reduced sensitivity, and difficulty in extracting characteristic patterns, etc.

Active Publication Date: 2014-02-12
PIXART IMAGING INC
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To be more specific, as far as the general optical mouse is concerned, when the surface to be tested has a partial dark phenomenon, that is, vignetting occurs, even if the detection result of the exposure state falls within the range of autoexposure (AE) , at this time, if the pattern on the surface to be tested tracked by the optical mouse enters a dark corner, the sensitivity of the sensor chip to the pattern texture difference on the surface to be tested will decrease, making it difficult to extract the correct characteristic pattern
Since the features are not significant enough, subsequent displacement calculations are prone to errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical displacement detection device and method
  • Optical displacement detection device and method
  • Optical displacement detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The drawings in the present invention are all schematic and are mainly intended to show the functional relationship between each device and each element. As for the shape, thickness and width, they are not drawn to scale.

[0032] See figure 1 , Showing the first embodiment of the optical displacement detection device of the present invention. The application of the optical displacement detection device in this embodiment is an optical mouse 100, which includes a light source 11, an image capturing unit 13, and a processing unit 15. Wherein, the light source 11 is, for example, but not limited to, a light emitting diode (LED) element or a laser diode (LD) element, which projects searchlight to the surface 10 to be measured, such as but not limited to a desktop or other surface, so that the image The capturing unit 13 captures the pattern or roughness on the surface 10 to be tested by receiving the light reflected from the surface 10 to be tested, and generates an image sig...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an optical displacement detection device and method. The optical displacement detection device comprises a light source, an image capturing unit and a processing unit. The light source emits searching light to the surface to be detected. The image capturing unit produces image signals according to the light reflected by the surface to be detected. The processing unit produces an exposure status value and an image characteristic value according to the image signals so as to determine the exposure range according to an initial exposure range, the exposure status value and the image characteristic value.

Description

Technical field [0001] The invention relates to an optical displacement detection device and an optical displacement detection method; in particular, it refers to an optical displacement detection device and an optical displacement detection method for adaptively selecting an exposure range. Background technique [0002] The optical displacement detection device has various application methods, and the most common application method is an optical mouse. In an optical mouse, the light emitted by the light source is guided to the desktop or other surface, and is reflected by the sensor chip inside the mouse. The sensor chip converts the optical signal into an electronic signal output, and the post-processor targets the electronic The signal is calculated to determine the displacement of the mouse. [0003] In detail, for a general optical mouse, when the surface to be tested is partially dark, that is, when there is a dark corner, even if the detection result of the exposure state f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F3/0354
Inventor 王彦章陈俊玮
Owner PIXART IMAGING INC