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Optical collimator, fingerprint recognition device, display substrate and display device

An optical collimation and fingerprint recognition technology, used in character and pattern recognition, acquisition/organization of fingerprints/palmprints, instruments, etc., can solve problems such as low transmittance and shortened display panel service life

Active Publication Date: 2020-01-21
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor found the following problems in the prior art: most of the optical collimators have relatively low transmittance, and it is necessary to increase the display brightness to meet the requirements of fingerprint identification, but long-term high brightness will reduce the display brightness. Panel Lifespan

Method used

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  • Optical collimator, fingerprint recognition device, display substrate and display device
  • Optical collimator, fingerprint recognition device, display substrate and display device
  • Optical collimator, fingerprint recognition device, display substrate and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 and 2 As shown, this embodiment provides an optical collimator, which can be applied in a fingerprint identification device. The optical collimator includes: a light shielding layer 1 and a lens array. The light-shielding layer 1 has a plurality of light-transmitting holes 2; the lens array includes a plurality of lens groups; each lens group includes a plurality of lenses 3; the lens groups are arranged in one-to-one correspondence with the light-transmitting holes 2; Among the light rays, light rays of different angles are irradiated on different lenses 3 in the lens group corresponding to the light transmission hole 2; each lens 3 is used to focus the light rays irradiated on it.

[0032] The optical collimator provided in this embodiment is used to collimate and focus the light reflected by the fingerprint. It can be understood that the valleys and ridges of the fingerprint have different reflectivity to light, so the light reflected by the finge...

Embodiment 2

[0034] This embodiment provides an optical collimator, such as figure 1 As shown, it includes a light-shielding layer 1 and a lens array. The light shielding layer 1 has a plurality of light transmission holes 2; the lens array includes a plurality of lens groups; each lens group includes a plurality of lenses 3; the lens groups and the light transmission holes 2 are arranged in one-to-one correspondence. Among the light rays emitted through each light transmission hole 2, light rays of different angles are irradiated on different lenses 3 in the lens group corresponding to the light transmission hole 2; focus.

[0035] The optical collimator provided in this embodiment can be applied to a fingerprint identification device, specifically, it can be applied to a fingerprint identification device of a display panel. In order to describe the optical collimator provided in this embodiment more clearly and clearly, the following uses the application of the optical collimator in an...

Embodiment 3

[0046] This embodiment provides a fingerprint identification device, such as image 3 As shown, it includes an optical collimator. The optical collimator can be any one of the optical collimators provided in Embodiment 1 or 2. Wherein, the light hole 2 is used to transmit the light reflected by the fingerprint; the lens array is arranged on the side of the light-shielding layer 1 away from the fingerprint contact surface.

[0047] Since the fingerprint recognition device provided in this embodiment includes the optical collimator provided in Embodiment 1 or Embodiment 2, and the optical collimator can accurately converge the light to the photoelectric sensor, the fingerprint recognition of the fingerprint recognition device provided in this embodiment High precision.

[0048] Preferably, the fingerprint identification device provided in this embodiment further includes: an optical sensor disposed on the side of the lens array away from the light-shielding layer 1 . The opti...

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PUM

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Abstract

The invention provides an optical collimator, a fingerprint recognition device, a display substrate and a display device, belongs to the technical field of display, and can solve the problem of low recognition efficiency of an existing fingerprint recognition unit. The optical collimator comprises: a light shielding layer having a plurality of light transmitting holes; a lens array including a plurality of lens groups; wherein each lens group comprises a plurality of lenses. The lens groups and the light holes are arranged in a one-to-one correspondence manner. In the light rays emitted from each light hole, the light rays with different angles irradiate different lenses in the lens group corresponding to the light hole. Each lens is used for focusing the light irradiated on the lens.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an optical collimator, a fingerprint recognition device, a display substrate and a display device. Background technique [0002] With the rapid development of electronic equipment, fingerprint identification technology has attracted more and more attention. Compared with the common capacitive fingerprint recognition device, the optical fingerprint recognition device has lower requirements on the screen thickness of the electronic device, and the placement position on the electronic device can be more flexible, and can increase the screen ratio of the electronic device. In order to realize these advantages, optical components such as an optical fingerprint sensor and an optical collimator need to be included in the optical fingerprint recognition device. [0003] In the process of fingerprint identification, the light reflected by the finger is modulated by the optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/20G02B6/32
CPCG02B6/32G06V40/1318G06V10/147
Inventor 张林王雷李昌峰王海生
Owner BOE TECH GRP CO LTD