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Image sensor

An image sensor and pixel unit technology, applied in the field of image processing, can solve problems such as smear, and achieve the effects of avoiding smear, improving image gain, and reducing power consumption

Pending Publication Date: 2021-11-26
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The HDR image obtained in this way has the problem of smearing in the process of multi-frame image fusion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Example 1, such as figure 2 As shown, the white pixel block corresponds to the red channel, the light gray pixel block corresponds to the green channel, and the dark gray pixel block corresponds to the blue channel. Taking the N-in-one image sensor as an example, the red channel in each photosensitive color channel corresponds to 4 pixel units In the circuit, 4 different capacitances are set for the gain capacitors of the 4-pixel unit circuit corresponding to the red channel, that is, 4 different red pixel information can be recorded through one red channel.

example 2

[0032] Example 2, such as image 3 As shown, the white pixel block corresponds to the red channel, the light gray pixel block corresponds to the green channel, and the dark gray pixel block corresponds to the blue channel. On the basis of example 1, the green channel in each photosensitive color channel corresponds to 4 pixel unit circuits. The gain capacitors of the 4-pixel unit circuit corresponding to the green channel are respectively set with 4 different capacitances, that is to say, 4 different green pixel information can be recorded through one green channel.

[0033] Example 2, such as Figure 4 As shown, the white pixel block corresponds to the red channel, the light gray pixel block corresponds to the green channel, and the dark gray pixel block corresponds to the blue channel. Based on example 1, the blue channel in each photosensitive color channel corresponds to 4 pixel unit circuits. Four different capacitances are set for the gain capacitors of the 4-pixel unit...

example 4

[0035]Example 4, on the basis of Example 1, the green channel in each light-sensitive color channel corresponds to 9 pixel unit circuits, and 9 different capacitances are set for the gain capacitors of the 9 pixel unit circuits corresponding to the green channel, that is to say , 9 different green pixel information can be recorded through one green channel.

[0036] In this way, through each photosensitive color channel in the image sensor, the electronic device can simultaneously obtain output images with different gains from the analog signal, saving system power consumption for the subsequent synthesis of HDR images.

[0037] Optionally, when the first information includes a preset threshold value, and the preset threshold value is 1, each photosensitive color channel corresponds to a single pixel unit circuit, a single pixel unit circuit is provided with a gain capacitor, and each of the same channel type The capacitances of the gain capacitors set for each photosensitive ...

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PUM

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Abstract

The invention discloses an image sensor, and belongs to the technical field of image processing. The image sensor comprises a plurality of photosensitive color channels, wherein each photosensitive color channel in the plurality of photosensitive color channels corresponds to at least one pixel unit circuit; and each pixel unit circuit comprises a gain capacitor, the capacitance of the gain capacitor is determined by first information, the first information comprises at least one of the following items: a preset threshold value and the area position of the pixel unit circuit in the photosensitive area, and the preset threshold value is the number of the pixel unit circuits corresponding to each photosensitive color channel.

Description

technical field [0001] The present application belongs to the technical field of image processing, and in particular relates to an image sensor. Background technique [0002] Since the shooting function of electronic devices has gradually become an important index to measure the performance of electronic products, it is necessary to continuously improve the image effects of electronic devices, especially the image effects of HDR (High Dynamic Range, high dynamic range) images. Compared with ordinary images, HDR images are synthesized based on LDR (Low-Dynamic Range, low dynamic range) images of exposure time and LDR images of the best details corresponding to each exposure time, which can provide more dynamic range and image details. [0003] In related technologies, the exposure time of each frame is controlled to obtain corresponding images, and then multiple frames of images with different exposure times are fused to finally obtain an HDR image. The HDR image acquired i...

Claims

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Application Information

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IPC IPC(8): H04N5/225H04N5/235H04N5/243
CPCH04N23/54H04N23/73H04N23/76Y02D10/00
Inventor 王丹妹
Owner VIVO MOBILE COMM CO LTD