Backlight module and electronic device

A technology of backlight module and light source, applied in the field of communication, can solve the problems of increasing LCD mobile terminals, low fingerprint identification accuracy, uneven display image, etc., and achieve the effect of maintaining display effect and realizing accurate identification and verification.

Inactive Publication Date: 2019-10-08
SHENZHEN LONGLI TECH CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optical fiber collimation layer and other optical functional layers increase the thickness of the LCD mobile terminal, and there is no distinction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Backlight module and electronic device
  • Backlight module and electronic device
  • Backlight module and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] First, by figure 2 , image 3 , the backlight module of Embodiment 1 of the present invention will be described. According to the backlight module of Embodiment 1 of the present invention, the backlight module includes a light source 221 , a light guide plate 220 disposed on one side of the light source 221 , a reflection sheet 210 disposed below the light guide plate 220 , and an infrared transparent plate disposed above the light guide plate 220 . The diffusion film 230, and the fingerprint identification device 103 arranged under the infrared transparent diffusion film 230 and the reflection sheet 210 to identify the optical signal of biological fingerprints; wherein, the infrared transparent diffusion film 230 contains uniformly distributed CdO nanoparticles with a particle size of about 20nm, such as image 3 As shown in the cross-sectional structure diagram of the infrared transparent diffusion film, the CdO nanoparticles emit light in the f...

Example Embodiment

[0030] Example 2

[0031] Please refer to Figure 4 , is a cross-sectional structural diagram of the backlight module based on the infrared transparent diffusion film according to the second embodiment of the present invention. Only the differences between Embodiment 2 and Embodiment 1 will be described below, and the similarities will not be repeated here. The fingerprint identification device is disposed between the light guide plate 220 and the reflector 210 .

Example Embodiment

[0032] Example 3

[0033] Please refer to Figure 5, is a cross-sectional structural diagram of the backlight module based on the infrared transparent diffusion film according to the third embodiment of the present invention. Only the differences between Embodiment 3 and Embodiment 1 will be described below, and the similarities will not be repeated here. The fingerprint identification device is disposed between the light guide plate 220 and the infrared transparent diffusion film 230 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a backlight module for fingerprint recognition in an LCD screen. The backlight module comprises a light source, a light guide plate disposed at one side of the light source, areflection sheet disposed below the light guide plate, an infrared transparent diffusion film disposed above the light guide plate, and a fingerprint recognition device disposed below the infrared transparent diffusion film. The fingerprint recognition device is used for identifying a biological fingerprint optical signal. The infrared transparent diffusion film contains visible light diffusion particles, so that visible light is diffused on the infrared transparent diffusion film; and the infrared light is transmitted through the infrared transparent diffusion film without scattering. With the backlight module, the fingerprint identification signal can be transmitted through the LCD module effectively and can be collected accurately, thereby realizing the in-screen fingerprint recognitionfunction of the LCD display device.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a backlight module and electronic equipment used for fingerprint identification in an LCD screen. Background technique [0002] Fingerprint sensing and matching is a reliable and widely used technology. A common method of fingerprint identification involves scanning a sample fingerprint or an image thereof and storing the image and / or unique characteristics of the fingerprint image, the characteristics of the sample fingerprint can be compared with information from reference fingerprints already present in a database to determine the correct identification of the user , for example for verification purposes. In particular, in-display fingerprint recognition is currently becoming more and more popular due to its ease of operation and versatility, and its suitability for compact portable electronic devices. The fingerprint recognition display device in the LCD screen obvio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G02F1/13357G02B5/20G06K9/00
CPCG02F1/133615G02F1/133606G02B5/208G06V40/1324
Inventor 张小齐杨运清蔡锋毅
Owner SHENZHEN LONGLI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap