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Pixel cells, arrays, image sensors and electronic devices

A technology of pixel units and circuits, applied in the field of image sensors, can solve the problems of low HDR image efficiency and achieve the effect of improving efficiency

Active Publication Date: 2022-07-12
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve high-dynamic range (High-Dynamic Range, HDR) image shooting, each pixel unit in the CIS needs to perform multiple exposures with different durations or multiple exposures with different gains to obtain multiple frames of images. The method outputs multiple frames of images as one frame of HDR images, but this way of multiple exposures leads to low efficiency in outputting HDR images

Method used

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  • Pixel cells, arrays, image sensors and electronic devices
  • Pixel cells, arrays, image sensors and electronic devices
  • Pixel cells, arrays, image sensors and electronic devices

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Embodiment Construction

[0037] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0038] First, the pixel layout of CIS is explained, such as figure 1 Shown in is a schematic diagram of the pixel layout of a CIS containing m*n pixel units, m*n pixel units P in the CIS ij All are the same pixel unit, and each pixel unit contains an independent circuit structure.

[0039] The pixel unit usually adopts ...

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Abstract

The present application provides a pixel unit, an array, an image sensor and an electronic device. The pixel unit includes: a photosensitive circuit, a gain adjustment circuit, and a first switch circuit connected between the photosensitive circuit and the gain adjustment circuit; the photosensitive circuit is used for sensing light The first switch circuit is used to control the connection between the photosensitive circuit and the gain adjustment circuit to be turned on or off according to the size of the optical signal, so as to change the signal amplification gain of the photosensitive circuit. Thus, it is realized that a frame of HDR image can be acquired through a single exposure and a single signal acquisition of the pixel unit, and the processing efficiency is improved.

Description

technical field [0001] The present application relates to image sensor technology, and in particular, to a pixel unit, an array, an image sensor and an electronic device. Background technique [0002] In recent years, Complementary Metal-Oxide-Semiconductor Transistor (CMOS) image sensors (CMOS Image Sensor, CIS) have been widely used in consumer, industrial, medical, security and many other aspects. requirements are also increasing. [0003] In the commonly used 4T CIS, each pixel unit consists of 4 transistors and a photodiode (Photo-Diode, PD). The photodiode receives the light signal and converts it into an electrical signal, which is then amplified and output by the transistor. In order to achieve high-dynamic range (High-Dynamic Range, HDR) image capture, each pixel unit in the CIS needs to perform multiple exposures with different durations or multiple exposures with different gain to obtain multiple frames of images, so as to obtain multiple frames of images. The m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/374H04N5/355
CPCH04N25/57H04N25/76
Inventor 王骞胡勇柳玉平
Owner SHENZHEN GOODIX TECH CO LTD