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Method and imaging device for reading exposure data of image sensor

An image sensor and exposure data technology, applied in the field of image sensors, can solve the problems of increasing chip area and chip cost, and achieve the effect of reducing cost and saving area

Active Publication Date: 2021-07-30
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, based on the existing technical conditions, it is necessary to output all the data collected by the two long and short exposures to synthesize wide dynamic data, which requires more storage units to store the data generated by the two long and short exposures, thereby increasing the chip’s capacity. area, increasing the cost of the chip

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  • Method and imaging device for reading exposure data of image sensor
  • Method and imaging device for reading exposure data of image sensor

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Embodiment Construction

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0041] A method for reading exposure data of an image sensor, a method for synthesizing a wide dynamic image, an imaging device, and an electronic terminal according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0042] figure 1 It is a circuit diagram of a traditional 4T pixel structure. Such as figure 1 As shown, the main components of a 4T pixel include: a photodiode PPD, a floating diffusion node FD, a transmission transistor TX, a reset transistor RST, a sourc...

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Abstract

The present invention proposes a method for reading exposure data of an image sensor and an imaging device. The image sensor includes a pixel array. The method for reading the exposure data of the image sensor includes: controlling the pixel array to perform two-stage exposure respectively; Within the exposure reading time of the current row of the pixel array, two levels of exposure data of the current row are respectively read. The method for reading the exposure data of the image sensor of the present invention can effectively save the area of ​​the memory and reduce the cost of the image sensor.

Description

technical field [0001] The present invention relates to the technical field of image sensors, in particular to a method for reading exposure data of an image sensor, a method for synthesizing wide dynamic images, an imaging device and an electronic terminal. Background technique [0002] The dynamic range of the image sensor is an important index to measure the performance of the image sensor. The dynamic range of the image sensor is determined by the available full well capacity of the pixel and the noise of the chip. When the noise level is constant, the performance of the image sensor can be improved by increasing the available full well capacity of the pixels, but usually larger pixels are required to achieve a relatively high dynamic range. If only the available full well capacity of the pixels is increased, the image sensor It is difficult to achieve a dynamic range above 90dB. [0003] In order to enable the image sensor to achieve a larger dynamic range, in the rela...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/235H04N5/265H04N5/369
CPCH04N5/265H04N23/54H04N23/741H04N25/70
Inventor 刘坤郭先清
Owner BYD SEMICON CO LTD