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Fingerprint identification structure and display device

A fingerprint recognition and fingerprint technology, which is applied in character and pattern recognition, acquisition/organization of fingerprints/palmprints, print image collection, etc., can solve the problems of low accuracy of fingerprint recognition, achieve the effect of avoiding mutual interference and improving accuracy

Active Publication Date: 2021-01-26
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the low accuracy of fingerprint identification in the prior art, and provide a fingerprint identification structure with high accuracy and a display device equipped with the fingerprint identification structure.

Method used

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  • Fingerprint identification structure and display device
  • Fingerprint identification structure and display device
  • Fingerprint identification structure and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] refer to figure 1 A structural schematic diagram of an example implementation of the shown fingerprint recognition structure.

[0047] The fingerprint identification structure may include a photodetector 6, a filter device 5, a display device 4, etc. arranged in sequence from bottom to top.

[0048] In this exemplary embodiment, the photodetector 6 may be touch sensing glass (sensor glass), that is, the photodetector 6 is disposed on a glass substrate. The photodetector 6 and the filter element 5 can be bonded by optical glue 8 .

[0049] In this exemplary embodiment, the display device 4 can be used as a light source, that is, the fingerprint 10 can reflect the light emitted by the display device 4 . The optical filter device 5 and the display device 4 can be bonded by optical glue 8 . The display device 4 may be a self-luminous display, for example, the display device 4 may be an organic light emitting diode display, such as a micro light emitting diode display (Mi...

Embodiment approach 2

[0066] Figure 5 It is a structural schematic diagram of another exemplary embodiment of the fingerprint identification structure of the present invention.

[0067] There are two main differences between this exemplary embodiment and the first exemplary embodiment: first, the display device 4 is not used as a light source, but is additionally provided with a special light source; second, the function of the light transmission plate 1 is different.

[0068] In this exemplary embodiment, the light source is disposed on a side of the light transmission plate 1 intersecting the light incident surface. The light incident surface can be the upper surface of the light transmission plate 1, and the light exit surface can be the lower surface of the light transmission plate 1, then, the side of the light transmission plate 1 intersecting the light incident surface can be the left side of the light transmission plate 1 , right side, front side or rear side. Therefore, the light source...

Embodiment approach 3

[0075] Figure 6 It is a structural schematic diagram of another exemplary embodiment of the fingerprint recognition structure of the present invention.

[0076] The main difference between this exemplary embodiment and the second exemplary embodiment is that: the optical adhesive layer disposed between the optical transmission board 1 and the optical filter device 5 is frame adhesive.

[0077] In this exemplary embodiment, the frame adhesive only bonds the periphery of the optical transmission plate 1 and the optical filter device 5, and does not adhere to the middle part. The frame adhesive has a certain thickness, so that the optical transmission plate 1 and the optical filter device 5 to form an air gap. The refractive index of air is smaller than that of the light transmission plate 1 , as long as the incident angle of the light is larger than the critical angle, the light will be totally reflected in the light transmission plate 1 . All the light incident on the side o...

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Abstract

The invention proposes a fingerprint identification structure. The fingerprint identification structure includes: a light source, a filter device and a photodetector; the light source is used to provide light for the fingerprint, and the fingerprint can reflect the light; the filter device is used to filter the reflected light reflected by the fingerprint, so that the reflected light at a set angle The filter device has a light incident surface and a light output surface set oppositely through the set area of ​​the photodetector; the photodetector is set on the light exit surface, and the photodetector is used to detect the light intensity distribution of the reflected light passing through the filter device , to identify the peaks and troughs of the fingerprint. The fingerprint identification structure can improve the accuracy of fingerprint identification.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification structure and a display device equipped with the fingerprint identification structure. Background technique [0002] With the development of fingerprint identification technology, it has been widely used in many fields, such as mobile phones, tablet computers and TVs in electronic equipment terminals; access control and safes in security protection systems. The realization methods of fingerprint collection mainly include optical, capacitive and ultrasonic imaging technologies, among which the optical fingerprint recognition technology has a relatively large recognition range and relatively low cost. [0003] At present, the optical fingerprint recognition technology used in displays such as Liquid Crystal Display (LCD for short), Organic Light-Emitting Diode (OLED for short), etc. The principle of diffuse reflection fingerprint ima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/20
CPCG06V40/1324G06V40/1359G06V40/1318G06V10/145
Inventor 高健陈小川许睿孟宪东谭纪风王维
Owner BOE TECH GRP CO LTD
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