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Distance measuring device and distance measuring method based on phase difference

A distance measurement and focal length technology, applied in the field of optical sensors, can solve the problem that the size and cost of the gesture recognition module cannot be effectively reduced.

Active Publication Date: 2019-04-30
PIXART IMAGING INC
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  • Claims
  • Application Information

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Problems solved by technology

As a result, the size and cost of the gesture recognition module cannot be effectively reduced

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  • Distance measuring device and distance measuring method based on phase difference
  • Distance measuring device and distance measuring method based on phase difference
  • Distance measuring device and distance measuring method based on phase difference

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[0029] Please refer to figure 1 and Figure 2A-2B as shown, figure 1 It is a schematic block diagram of a distance measuring device 1 according to an embodiment of the present invention, Figure 2A-2B It is a cross-sectional view of an image sensor and a condenser lens of a distance measuring device according to some embodiments of the present invention. The distance measuring device 1 includes a condenser lens 10 , an image sensor 11 and a processor 13 . In some embodiments, for example, the processor 13 and the image sensor 11 can be disposed in the same chip at the same time. In some embodiments, the processor 13 may be a processing unit outside the image sensor 11, configured to receive and process the image frame F acquired by the image sensor 11, to calculate the depth of at least one image region or to establish A depth map (depth map) of the image frame F, that is, a plurality of image region depth maps. For example, the processor 13 may be a microcontroller (MCU)...

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Abstract

The invention provides a distance measurement device which comprises a pixel array and a shielding layer, wherein the shielding layer is shielded above the pixel array and comprises a first shielding mode shielding above a first area of a plurality of first pixels and a second shielding mode shielding above a second area of a plurality of second pixels. The first area and the second area form a mirror symmetry rectangle along a first direction.

Description

technical field [0001] The invention relates to an optical sensor, in particular to a distance measuring device based on phase difference and a distance measuring method thereof. Background technique [0002] Generally speaking, a distance measurement system (DMS) usually uses a light source, and uses the energy of the beam of the light source reflected back by the object to calculate the distance of the object. Traditionally, a triangulation method or a time-of-flight (TOF) technical solution can be used to calculate the distance, but the cost of the above-mentioned method is relatively high and the size of the system is relatively large. [0003] In addition, the development basis of gesture recognition can usually use 3D images to eliminate the background image first to extract the foreground object image, and such a technology will use two image sensors. As a result, the size and cost of the gesture recognition module cannot be effectively reduced. [0004] Based on th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/00G01C3/02
CPCG01C3/00G01C3/02
Inventor 许恩峯刘家佑
Owner PIXART IMAGING INC