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Detection device and identification system

A detection device and detection circuit technology, which is applied in the field of detection devices, can solve the problems of human eye injury, damage, and inability to obtain sufficient scattering, and achieve the effect of eliminating potential safety hazards and saving light energy

Inactive Publication Date: 2019-01-04
INTERFACE TECH CHENGDU CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optical element used to scatter the laser light at the laser output end will be damaged. For example, if the optical element is broken, the laser light reaching the optical element may not be fully scattered at this time, and the light reaching the face through the crack is still Lasers with high energy, especially lasers that reach the human eye, will cause great damage to the human eye; and, on the other hand, when the above-mentioned optical components are damaged, they can no longer work normally, but the laser light source still continues at this time. work, wastes energy

Method used

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  • Detection device and identification system
  • Detection device and identification system
  • Detection device and identification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , is a structural diagram of the identification system 500 , which includes the detection device 100 and the light source module 400 . The detection device 100 in this embodiment can be used to detect the state of the light source module 400 . Such as figure 1 As shown, the detection device 100 includes a light refraction structure 110 and a resistance detection circuit 120 , and the light source module 400 includes a light source 200 and a base plate 300 . In this embodiment, the light emitting source 200 is disposed on the bottom plate 300 of the center, and the light refraction structure 110 is disposed on the light emitting path of the light emitting source 200 .

[0033] see figure 2 , which is a schematic structural diagram of the light refraction structure 110 . The light refraction structure 110 includes a substrate 111 , a conductive layer 112 and a refraction layer 113 which are sequentially stacked. The substrate 111 is an insulating materi...

Embodiment 2

[0056] Such as Figure 9 As shown, the difference between this embodiment and the first embodiment mainly lies in: the structure of the resistance detection circuit 120 is different.

[0057] The resistance detection circuit 120 in this embodiment includes a second voltage source 125 , a second detection module 126 and a second comparison module 127 .

[0058] The second voltage source 125 is used to provide the second voltage U2 , the second voltage source 125 is connected to the second detection module 126 , and outputs the second voltage U2 to the second detection module 126 .

[0059] The second detection module 126 receives the second voltage U2. The first connection pad 114 is electrically coupled to the second voltage source 125 and the second comparison module 127 respectively, and is grounded through the second connection pad 115 . The second sensing voltage U2' is output to the second comparison module 127 according to the second voltage U2. The second detection m...

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PUM

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Abstract

The invention discloses a detection device which is applied to a light source module, wherein the light source module comprises a light emitting source; the detection device comprises a light refraction structure and a resistance detecting circuit; the light refraction structure comprises a substrate, a conducting layer and a refracting layer formed on the substrate; the conducting layer is provided with a resistance; the resistance detecting circuit is electrically connected with the conducting layer and used for detecting the resistance of the conducting layer and generating a detection signal according to the change of the resistance, wherein the detection signal is used for representing the state of the refracting layer. The detecting device provided by the invention facilitates the saving of light energy on the one hand, and also facilitates the elimination of safety hazards on the other hand.

Description

technical field [0001] The invention relates to a detection device and an identification system using the detection device. Background technique [0002] As people pay more attention to information security, many systems (such as access control systems) or terminals (such as ipads, mobile phones) are equipped with face recognition functions. [0003] In the prior art, the modules that realize the face recognition function usually use laser light as the light source, and an optical element is arranged at the output end to scatter the laser light, and then the face image information is captured through the scattered light. However, the optical element used to scatter the laser light at the laser output end will be damaged. For example, if the optical element is broken, the laser light reaching the optical element may not be fully scattered at this time, and the light reaching the face through the crack is still Lasers with high energy, especially lasers that reach the human e...

Claims

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Application Information

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IPC IPC(8): G01N27/20G06K9/20G06V10/145
CPCG01N27/20G06V10/145G06V10/147G01R27/14G01R17/105G06V40/16G01N21/41G01N27/045G01R19/16576G06V40/161
Inventor 魏福呈廖致霖
Owner INTERFACE TECH CHENGDU CO LTD