Fingerprint detection method, fingerprint sensor and electronic equipment

A fingerprint sensor and electronic device technology, applied in the information field, can solve problems such as affecting fingerprint image collection and reducing fingerprint detection performance.

Active Publication Date: 2021-04-16
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This affects the collection of fingerprint images by the fingerprint sen...

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  • Fingerprint detection method, fingerprint sensor and electronic equipment
  • Fingerprint detection method, fingerprint sensor and electronic equipment
  • Fingerprint detection method, fingerprint sensor and electronic equipment

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Embodiment Construction

[0038] The technical solution in this application will be described below with reference to the accompanying drawings.

[0039] Current electronic devices pursue a higher screen-to-body ratio, requiring more front-facing components to be moved below the screen, such as proximity sensors and ambient light sensors. Especially when the ambient light sensor is set under the display screen, the ambient light sensor needs to detect the light intensity of the ambient light penetrating the display screen, therefore, it is very easy to be affected by the brightness of the display screen when detecting ambient light, which affects the accuracy of ambient light detection sex. For this reason, in order to improve the accuracy of ambient light detection, some display screens have changed the display mode of the display screen, increased the length of the dimming cycle (high duty cycle) used to adjust the brightness of the display screen, and increased the length of each dimming cycle. The...

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Abstract

The invention provides a fingerprint detection method, a fingerprint sensor and electronic equipment, which can reduce the influence of the brightness change of a display screen on fingerprint detection more easily and improve the performance of fingerprint detection. The fingerprint detection method comprises the steps that a synchronizing signal of a display screen is received, the synchronizing signal is used for triggering a pixel array of a fingerprint sensor to conduct exposure, the period of the synchronizing signal is synchronous with the dimming period of the display screen, and the dimming period comprises a bright time period and a dark time period; and on the basis of triggering of the synchronization signal, each row of pixels of the pixel array in sequence is exposed, so that the positions of the pixels corresponding to the exposure time and the dark time period in the pixel array are constant, and data of each row of pixels after exposure is used for acquiring a fingerprint image.

Description

technical field [0001] The embodiment of the present application relates to the field of information technology, and more specifically, relates to a fingerprint detection method, a fingerprint sensor, and an electronic device. Background technique [0002] Current electronic devices pursue a higher screen-to-body ratio, requiring more front-facing components to be moved below the screen, such as proximity sensors and ambient light sensors. For the ambient light sensor, when it is arranged under the display screen of the electronic device, the ambient light sensor needs to detect the light intensity of the ambient light penetrating the display screen. Therefore, it is very vulnerable to the brightness of the display screen when detecting the ambient light. Influence, affecting the accuracy of ambient light detection. The display screen can dim its brightness according to a certain dimming cycle, so that the ambient light sensor can detect the ambient light. In order to impr...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 青小刚
Owner SHENZHEN GOODIX TECH CO LTD
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