Fingerprint imaging unit and formation method thereof

An imaging unit and fingerprint technology, which is applied in the direction of acquiring/organizing fingerprints/palmprints, printing image collection, instruments, etc., can solve problems such as difficulty in improving integration, complex structure, and large volume

Active Publication Date: 2016-06-22
SHANGHAI OXI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the fingerprint imaging unit in the prior art has the problems of complex structure and large volume, and it is difficult to improve the integration degree.

Method used

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  • Fingerprint imaging unit and formation method thereof
  • Fingerprint imaging unit and formation method thereof
  • Fingerprint imaging unit and formation method thereof

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Experimental program
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Embodiment Construction

[0060] It can be known from the background art that the fingerprint imaging unit in the prior art has the problems of complex structure and large volume. Now combined with the structure of the fingerprint imaging unit in the prior art, the reasons for its excessive thickness are analyzed:

[0061] refer to figure 1 , showing a schematic diagram of a fingerprint imaging unit.

[0062] The initial light generated by the LED light source 11 forms uniform incident light through the light guide plate 12; the uniform incident light is projected onto the hypotenuse 13b of the triangular prism 13 through the first right-angled side 13a of the triangular prism 13, and the incident light occurs on the hypotenuse 13b of the triangular prism 13 Total reflection forms reflected light; the reflected light exits through the second right-angled side 13 c of the triangular prism 13 , is focused by the convex lens 14 , and projected to the image sensor 15 .

[0063] When the finger 16 is pres...

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Abstract

A fingerprint imaging unit and a formation method thereof are disclosed. The fingerprint imaging unit comprises a light guide substrate, a plurality of net points and a sensitization device, wherein the light guide substrate includes a first surface, a second surface opposite to the first surface and a side surface located between the first surface and the second surface; the plurality of net points form on the second surface of the light guide substrate and are used for forming sensing light which is emergent from the first surface; and the sensitization device is arranged in the first surface. In the invention, through arranging the plurality of net points on the second surface of the light guide substrate, usage of a light guide plate is omitted so that the structure of the fingerprint imaging unit is simplified; thickness of the fingerprint imaging unit is reduced; an integration level of the fingerprint imaging unit is increased; and manufacturing cost and technology difficulty of the fingerprint imaging unit are reduced.

Description

technical field [0001] The invention relates to the field of fingerprint sensing, in particular to a fingerprint imaging unit and a method for forming the same. Background technique [0002] The fingerprint recognition technology collects the fingerprint image of the human body through the fingerprint imaging unit, and then compares it with the existing fingerprint imaging information in the fingerprint recognition system to realize the identity recognition. Due to the convenience of use and the uniqueness of human fingerprints, fingerprint recognition technology has been widely used in various fields, such as: public security bureaus, customs and other security inspection fields, building access control systems, and consumer goods such as personal computers and mobile phones. [0003] One of the imaging units used in the fingerprint identification technology is to collect the fingerprint image of the human body through an optical imaging unit. During fingerprint sensing, t...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/1324G06V40/1318
Inventor 朱虹房伟凌严郑娅洁那志成
Owner SHANGHAI OXI TECH
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