Dual-core focusing image sensor and focusing method thereof, and imaging device

An image sensor and focus control technology, which is applied in focusing devices, exposure control, image communication, etc., can solve the problems of reduced light flux and dual-core focusing difficulties, and achieve the effects of improving focusing speed, increasing light flux, and ensuring accuracy

Active Publication Date: 2017-08-11
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the dual-core full-pixel focusing technology is used for focusing, the photodiode of each pixel is divided into two, which reduces the amount of light passing through, which in turn makes dual-core focusing difficult in low-light environments.

Method used

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  • Dual-core focusing image sensor and focusing method thereof, and imaging device
  • Dual-core focusing image sensor and focusing method thereof, and imaging device
  • Dual-core focusing image sensor and focusing method thereof, and imaging device

Examples

Experimental program
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Effect test

example 1

[0057] Example 1, W is divided from the left and right sides.

[0058] In this example, W is divided into two parts on the left and right sides, and the output value of a part of the photosensitive pixels in the focusing photosensitive unit can be the output value of the two "1"s on the left side of W as the first output value, then W right The output value of the two "2" on the side is used as the second output value.

example 2

[0059] Example 2, W is divided from the upper and lower sides.

[0060] In this example, W is divided into upper and lower parts, and the output value of a part of photosensitive pixels in the focus photosensitive unit can be the output value of two "1"s on the upper side of W as the first output value, then the lower side of W The two output values ​​of "2" are used as the second output value.

example 3

[0061] Example 3, W is divided from the diagonal side.

[0062] In this example, W is divided into two parts according to two diagonal lines, that is, the output value of the two "1"s in the upper left corner and the lower right corner of W is the first output value, and the two "1"s in the lower left corner and upper right corner are the first output values. 2” output value as the second output value.

[0063] In an embodiment of the present invention, after the first output value and the second output value are read, the first phase difference information can be obtained according to the first output value and the second output value.

[0064] For example, taking the output value of two "1"s on the left side of W as the first output value and the output value of two "2"s on the right side of W as the second output value, you can first calculate the two values ​​on the left side The sum of the output values ​​of "1" is used as the first phase information, and then the sum of...

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Abstract

The present invention discloses a dual-core focusing image sensor and focusing method thereof, and an imaging device. The dual-core focusing image sensor comprises a photosensitive unit array, a filtering unit array arranged on the photosensitive unit array, and a micro-lens array located on the filtering unit array; and the micro-lens array comprises first micro lenses and second micro lenses, one first micro lens covers one white filtering unit, one white filtering unit covers one focusing photosensitive unit, the area of one white filtering unit is half of the area of one focusing photosensitive unit, and one second micro lens covers one dual-core focusing photosensitive pixel. The dual-core focusing image sensor provided by the embodiment of the invention can increase the light transmission amount of the focusing pixels and provide hardware basis for improving the focusing speed in the low light environment and ensuring the image quality color recovery accuracy.

Description

technical field [0001] The invention relates to the technical field of image equipment, in particular to a dual-core focus image sensor, a focus control method and an imaging device thereof. Background technique [0002] Among related focusing technologies, dual-core full-pixel focusing technology has become the most advanced focusing technology on the market. Compared with contrast focusing, laser focusing and phase focusing technologies, the dual-core full-pixel focusing technology has a faster focusing speed and a wider focusing range. In addition, due to the dual-core full-pixel focusing technology, the "dual-core" photodiodes are "merged" into one pixel for output during imaging, which can ensure the focusing performance without affecting the image quality. [0003] However, when the dual-core full-pixel focusing technology is used for focusing, the photodiode of each pixel is divided into two, which reduces the amount of light passing through, which in turn makes dual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/225
CPCH04N23/54H04N23/67G02B7/346G02B3/0043G02B5/201H01L27/14621H01L27/14627H01L27/14645G03B13/36H04N23/672H04N25/704H04N25/133G03B7/099H04N25/702
Inventor 曾元清
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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