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An Angle-Sensitive Image Pixel Unit

A technology of image pixels and angles, applied in radiation control devices and other directions, can solve the problems of sensitivity to incident light intensity and neglect of other information of incident light, etc., and achieve the effect of simple and reliable judgment

Active Publication Date: 2018-10-16
SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing CIS products using APS image pixels are only sensitive to the light intensity of the incident light, and ignore other information of the incident light

Method used

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  • An Angle-Sensitive Image Pixel Unit
  • An Angle-Sensitive Image Pixel Unit
  • An Angle-Sensitive Image Pixel Unit

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Embodiment Construction

[0022] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention. In addition, the present invention is described in detail by means of schematic diagrams. When describing the examples of the present invention in detail, for the sake of illustration, the schematic diagrams are not partially enlarged according to the general scale, which should not be used as a limitation of the present invention.

[0023] figure 2 It is a schematic diagram of the refraction of light by a micro-lens (GRIN Micro-lens) using a graded-index material. Such as figure 2 As shown, the dotted line is the surface normal of the photodiode. figure 2 The ...

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Abstract

The invention discloses an image pixel unit sensitive to the angle. The image pixel unit comprises a sensitization unit, a reading circuit and a comparing unit, wherein the sensitization unit is used for performing photoelectric conversion on incident light entering a light path after the incident light is refracted by a micro lens, and the micro lens is made of gradient refractive index materials. The reading circuit is used for outputting voltage signals of the sensitization unit. The comparing unit is connected with the reading circuit and used for comparing the voltage signals output by the reading circuit with a reference threshold value, and a 1 bit digital signal '1' or '0' is output according to the comparison result. The incident angle of light can be conveniently, visually and reliably judged with the image pixel unit.

Description

technical field [0001] The invention relates to the field of semiconductor integrated circuits, in particular to an image pixel unit sensitive to angles. Background technique [0002] Image sensors are widely used in civil and commercial applications. Currently, the image sensor consists of a CMOS image sensor (CMOS IMAGE SENSOR, hereinafter referred to as CIS) and a charge-coupled image sensor (Charge-coupled Device, hereinafter referred to as CCD). Compared with CCD image sensors, CMOS image sensors have the main advantages of low manufacturing cost, low power consumption and small image delay; at the same time, with the advancement of technology, CIS inherent rolling shutter effect and signal-to-noise ratio The low disadvantage is slowly changing, and the image quality of many CIS products is already comparable to that of CCD products. [0003] At present, a large part of CIS uses Active Pixel Sensor (APS for short) to form its unit pixel, which is manufactured using st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/146
Inventor 陈嘉胤
Owner SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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