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biometric device

A biometric identification technology to be identified, applied in character and pattern recognition, instruments, computing, etc., can solve the problems of scattered transmission of light beams, poor image quality, affecting identification results, etc.

Active Publication Date: 2022-03-08
FOCALTECH ELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned imaging process, the light beam diffused by the fingerprint is likely to be scattered and transmitted to the image acquisition element, resulting in poor imaging quality and affecting the recognition result

Method used

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Embodiment Construction

[0065] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the drawings and description to refer to the same or like parts.

[0066] figure 1 It is a schematic cross-sectional view of a biometric identification device according to an embodiment of the present invention. Please refer to figure 1 , the biometric identification device 100 is, for example, a fingerprint identification device for identifying the fingerprint of the object F to be identified. But the present invention is not limited thereto. In another embodiment, the biometric identification device 100 can also be used to identify veins, palm prints, other biometric features or a combination of at least two of the above.

[0067] The biometric identification device 100 includes a light source 110 , a light guide element 120 , an image acquisition ele...

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Abstract

The invention provides a biometric identification device, which includes a light source, a light guide element, an image acquisition element, and a collimator located between the light guide element and the image acquisition element. The collimator includes a first light-transmitting element, at least one second light-transmitting element, a first light-shielding layer and a plurality of second light-shielding layers. The first light shielding layer is located between the first light transmission element and at least one second light transmission element. A plurality of second light-shielding layers are located on the first light-transmissive element and at least one second light-transmissive element respectively. The first transparent element and the at least one second transparent element have thicknesses H1 and H2. A plurality of first openings of the first light shielding layer are arranged with a pitch P, each first opening of the first light shielding layer has a width W, and [(P‑W) / W]·H1≧H2≧[W / (P‑W) / W]·H1≧H2≧[W / (P‑W) / W] W)] · H1. Through the collimator, the light beams acted on by each part of the object to be identified are transmitted to the corresponding pixel area and are not easy to enter into other pixel areas by mistake, thereby improving the imaging quality of the biometric identification device.

Description

technical field [0001] The invention relates to a biological identification device. Background technique [0002] Types of biometric identification include face, voice, iris, retina, vein, fingerprint and palmprint recognition, etc. Since each person's fingerprint is unique, and the fingerprint is not easy to change with age or health status, the fingerprint identification device has become the most popular biometric identification device at present. According to different sensing methods, fingerprint identification devices can be classified into optical type and capacitive type. When the capacitive fingerprint recognition device is assembled in an electronic product (such as a mobile phone, a tablet computer), a protective element (cover lens) is often provided above the capacitive fingerprint recognition device. Generally speaking, additional processing (such as drilling or thinning) of the protection element is required, so that the capacitive fingerprint recognition de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06V40/13G02B27/30
CPCG02B27/30G06V40/1324
Inventor 钟炜竣
Owner FOCALTECH ELECTRONICS LTD