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Under-screen optical fingerprint imaging device

An imaging device, fingerprint technology, applied in instruments, character and pattern recognition, computer parts and other directions, can solve problems such as imaging stability and poor quality

Active Publication Date: 2019-06-07
SILEAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the difference in the intensity and brightness of the reflected light that finally reaches the fingerprint sensor 600 is not obvious, and the imaging stability and quality are poor.

Method used

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Embodiment Construction

[0063] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0064] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may a...

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Abstract

The invention provides an under-screen optical fingerprint imaging device. The under-screen optical fingerprint imaging device comprises a substrate provided with a light-emitting unit; a light sensing element which is arranged on one side of the substrate and is used for converting the light signal into an electric signal for imaging; a first diaphragm unit which is arranged on the side, deviating from the light sensing element, of the substrate and comprises a first 1 / 4 wave plate and a first linear polarizing film, and the first 1 / 4 wave plate is located between the first linear polarizingfilm and the substrate; a third 1 / 4 wave plate is arranged on one side, deviating from the substrate, of the first diaphragm unit, a third angle is formed between the optical axis of the third 1 / 4 wave plate and the polarization direction of the first linear polaroid, and the value of the third angle is 45 + / -5 degrees; a cover plate which is arranged on the side, deviating from the substrate, ofthe third 1 / 4 wave plate and provided with a light-transmitting area, and the light-transmitting area is used for being pressed by fingers of a user or getting close to the light-transmitting area. The under-screen optical fingerprint imaging device provided by the embodiment of the invention can effectively improve the imaging stability and quality.

Description

technical field [0001] The invention relates to the technical field of under-screen optical fingerprints, in particular to an under-screen optical fingerprint imaging device. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] Under-screen fingerprints can currently be applied under OLED displays using fingerprint sensor imaging methods. Specifically, the light emitted by the OLED light source configured in the display panel reaches the finger pressing or touching the glass cover through the 1 / 4 wave plate and the linear polarizing plate sequentially arranged on the outer surface of the display panel. The light at the ridge of the finger will be diffusely reflected and the brightness will be reduced, while the light at the valley will be brighter due to specular reflection. Thus, the brightness of the light reflected back and reaching the fingerprint se...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 程泰毅焉逢运孙云刚谢詹奇
Owner SILEAD
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