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Fingerprint identification device

A fingerprint recognition and micro-mirror technology, which is applied in character and pattern recognition, computing, computer components, etc., can solve the problems of uneven brightness and darkness, sensitive sensor distance, and small light receiving angle, so as to avoid uneven brightness and darkness Effect

Pending Publication Date: 2022-04-22
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small angle range of the optimized light collection angle, the sensor becomes sensitive to the distance between the self-luminous panel and the micromirror layer. If the distance between the two is not set properly, the problem of uneven brightness and darkness may occur

Method used

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Embodiment Construction

[0038] refer to Figure 1A , Figure 1B and Figure 1C , Figure 1A The cross section shown corresponds to Figure 1B The line segment AA' in Figure 1C The cross section shown corresponds to Figure 1B The line segment BB' in .

[0039] The fingerprint recognition device 1 provided according to this embodiment includes an image detection unit 100 and an image generation unit 200 . The image generating part 200 includes a light emitting layer 201 and a transparent cover 202 , and the image detecting part 100 includes a micromirror layer 101 and an image sensing layer 103 . The micromirror layer 101 is disposed between the light emitting layer 201 and the image sensing layer 103 . The image sensing layer 103 has a plurality of pixels.

[0040] In this embodiment, four pixels P1 , P2 , P3 and P4 of the image sensing layer 103 are illustrated as examples. The micromirror layer 101 has a plurality of micromirrors respectively corresponding to the pixels P1, P2, P3 and P4, s...

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Abstract

The invention discloses a fingerprint identification device which comprises a light-emitting layer, an image sensing layer and a micro-mirror layer. The image sensing layer is provided with a plurality of pixels. The micro-mirror layer is disposed between the light-emitting layer and the image sensing layer, and has a plurality of micro-mirrors corresponding to the pixels, respectively. The distance between the micro-mirror layer and the light-emitting layer is smaller than or equal to 800 micrometers and larger than or equal to h1, h1 = x / 2 * tan theta, x is the minimum spacing distance of the micro-mirrors corresponding to different pixels on the plane where the micro-mirror layer is located, and theta is the light receiving full-width-at-half-maximum angle of each micro-mirror.

Description

technical field [0001] The invention relates to an optical sensing device, and in particular to a fingerprint recognition device. Background technique [0002] The fingerprint signal detected by the under-screen fingerprint recognition sensor is transmitted to the bottom through the light-transmitting area of ​​the self-luminous panel, collected by the micromirror layer below it, and then incident on the sensor. Since the receiving angle of each micromirror is fixed, an appropriate distance needs to be maintained between the self-luminous panel and the micromirror layer to avoid the problem of uneven brightness and darkness. In addition, it is also necessary to optimize the receiving angle of each micromirror to avoid crosstalk. However, since the angle range of the optimized light collection angle is small, the sensor becomes sensitive to the distance between the self-luminous panel and the micromirror layer. If the distance between the two is not set properly, uneven brig...

Claims

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Application Information

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IPC IPC(8): G06V40/13
CPCG06V40/1318G06V40/1324H10K59/10G02F1/133603G02F1/133526G06V40/1341
Inventor 谢尚玮刘耿瑜丘兆仟陈彦良
Owner AU OPTRONICS CORP