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Optical in-display fingerprint identification device and system, LCD

A liquid crystal display, fingerprint recognition technology

Active Publication Date: 2020-05-01
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides an under-screen optical fingerprint recognition device and system, and a liquid crystal display to solve the problem of low fingerprint recognition accuracy in the prior art

Method used

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  • Optical in-display fingerprint identification device and system, LCD
  • Optical in-display fingerprint identification device and system, LCD
  • Optical in-display fingerprint identification device and system, LCD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Figure 4 A schematic diagram of the structure of the under-screen optical fingerprint recognition device provided in Embodiment 1 of the present application, as shown in Figure 4 As shown, the under-screen optical fingerprint recognition device of this embodiment is suitable for a liquid crystal display screen having a display module 1 and a backlight module 2, wherein a first reflective polarizer is arranged between the display module 1 and the backlight module 2 The film layer 3, the under-screen optical fingerprint identification device 100 includes: a detection light source 50 arranged under the backlight module 2, an optical path guiding structure 6, and an optical fingerprint sensor 7; the detection light source 50 is used to emit detection light, and the detection light passes through the liquid crystal display The screen is irradiated on the finger 13, and the optical path guiding structure 6 is used to guide the fingerprint detection light reflected by the fi...

Embodiment 2

[0159] On the basis of Embodiment 1, this embodiment provides an under-screen optical fingerprint recognition system applicable to liquid crystal display devices. Figure 11 A schematic structural diagram of the under-screen optical fingerprint recognition device provided for Embodiment 2 of the present application, as shown in Figure 11 As shown, the under-screen optical fingerprint recognition system of this embodiment includes a liquid crystal display 200 and the under-screen optical fingerprint recognition device 100 described in Embodiment 1. The under-screen optical fingerprint recognition device is arranged under the liquid crystal display for detecting The fingerprint information of the finger 13 above the LCD screen. The under-screen optical fingerprint recognition system can be applied to smart phones, tablet computers, and other mobile terminals or electronic devices using liquid crystal displays.

[0160] In this embodiment, the liquid crystal display includes a ...

Embodiment 3

[0166] This embodiment provides a liquid crystal display that supports an under-screen fingerprint recognition function, and the under-screen optical fingerprint recognition device 100 described in Embodiment 1 is provided below the liquid crystal display. The liquid crystal display includes: a display module 1, a backlight module 2, and a first reflective polarizing film layer 3 between the display module 1 and the backlight module 2; the backlight module 2 is arranged below the display module 1, and To provide a backlight for the display module 1, and make the fingerprint detection light formed by the finger 13 above the liquid crystal display pass through the backlight module 2 and irradiate the under-screen optical fingerprint recognition device 100 below the backlight module 2, that is, this embodiment In an example, the fingerprint detection light can be transmitted to the optical path guiding structure 6 and the optical fingerprint sensor 7 of the under-display optical f...

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Abstract

The invention provides an optical in-display fingerprint identification device, an optical in-display fingerprint identification system and a liquid crystal display screen. The optical in-display fingerprint identification device comprises a detection light source arranged below a backlight module, a light path guide structure and an optical fingerprint sensor, the detection light source is used for emitting detection light, and the detection light irradiates a finger through the liquid crystal display screen.The light path guide structure is used for guiding fingerprint detection light whichis reflected by a finger, carries fingerprint information and penetrates through the liquid crystal display screen to the optical fingerprint sensor; the optical fingerprint sensor is used for acquiring fingerprint information of a finger according to the fingerprint detection light; at least one of the detection light and the fingerprint detection light penetrates through the polarization layer;the polarization layer is used for filtering S waves in the detection light and / or the fingerprint detection light, and the polarization layer is located above the under-screen optical fingerprint recognition device; and the polarization direction of the polarization layer is the same as that of the first reflective polarizing film layer. The accuracy of fingerprint identification is high.

Description

technical field [0001] The present application relates to fingerprint identification technology, in particular to an under-screen optical fingerprint identification device and system, and a liquid crystal display. Background technique [0002] With the development of display technology, identification technology continues to innovate, change and develop, especially fingerprint identification technology on mobile terminals has become the mainstay of identification. [0003] Liquid Crystal Display (LCD) screens have many advantages such as thin bodies, power saving, and no radiation, and are widely used in electronic products such as televisions, computers, and mobile phones. The LCD screen generally requires a backlight module to illuminate the liquid crystal panel to display images. When the under-screen optical fingerprint recognition technology is applied to a liquid crystal display with a reflective polarizing film, the under-screen fingerprint recognition module general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G02F1/1333G02F1/1335
CPCG02F1/13338G02F1/133528G06V40/1318
Inventor 杜灿鸿蒋方林
Owner SHENZHEN GOODIX TECH CO LTD
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