Fingerprint sensing module

A technology of fingerprints and photosensitive elements, which is applied in the direction of acquiring/arranging fingerprints/palmprints, character and pattern recognition, instruments, etc. It can solve the problems of fingerprint image blurring and reliability decline, so as to improve sensing sensitivity and increase external force tolerance performance and manufacturing process margin, and the effect of increasing light energy utilization

Pending Publication Date: 2021-12-14
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of fingerprint sensing module is prone to receive stray light incident at a large angle due to the large distance between these micro-lenses, resulting in blurred fingerprint images
In addition, when the user presses the display panel for fingerprint recognition, the curved display panel will increase the risk of these micro-lenses being crushed, resulting in a decrease in the reliability of long-term operation

Method used

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Embodiment Construction

[0097] As used herein, "about," "approximately," "essentially," or "essentially" includes the stated value and averages within acceptable deviations from the particular value as determined by one of ordinary skill in the art, taking into account the The measurement and the specific amount of error associated with the measurement (i.e., the limits of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or for example within ±30%, ±20%, ±15%, ±10%, ±5%. Moreover, "about", "approximately", "essentially" or "substantially" used herein may select a more acceptable range of deviation or standard deviation according to measurement properties, cutting properties or other properties, and may not use One standard deviation applies to all properties.

[0098] In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It will be understood that when an element such as a layer, film, r...

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PUM

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Abstract

The invention provides a fingerprint sensing module. The fingerprint sensing module comprises a first substrate, an active element, a photosensitive element layer, a collimation structure layer, a second substrate, a plurality of micro lenses and a gap pattern, the active element is disposed on the first substrate. The photosensitive element layer is arranged on the first substrate and is electrically connected with the active element. The collimation structure layer is arranged on the photosensitive element layer. The second substrate is arranged on the collimation structure layer. The plurality of micro lenses are arranged on the surface of the side, away from the photosensitive element layer, of the collimation structure layer and are overlapped on the photosensitive element layer. The micro-lens areas are divided into a plurality of micro-lens groups, and the micro-lens groups are respectively located in a plurality of sensing pixel areas of the fingerprint sensing module. The gap pattern extends between the microlens groups. According to the fingerprint sensing module provided by the invention, the external force tolerance and the manufacturing process margin of the fingerprint sensing module can be increased, so that the manufacturing process yield and the reliability of the fingerprint sensing module are improved.

Description

technical field [0001] The invention relates to a sensing module, in particular to a fingerprint sensing module. Background technique [0002] In order to increase the screen-to-body ratio of the display to achieve a narrow bezel design, under-display fingerprint sensing technology has become a trend. To put it simply, the under-display fingerprint sensing technology is to configure the fingerprint sensing module under the display panel of the electronic device. After the electronic device detects that the user touches the display screen, the electronic device controls the display panel to emit light to illuminate the surface of the user's finger. The sensing light will be (diffusely) reflected by the user's finger into the fingerprint sensing module under the display panel, and the reflected light will be concentrated on the photosensitive element through multiple micro-lenses and collimating structures to convert it into a digital image signal, namely The image of the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/20
CPCG06V40/1318H01L27/14678H01L27/14645H01L27/1462H01L27/14623H01L27/14627H01L27/14621G06F3/042
Inventor 丘兆仟王硕宏吕诗桦朱训箴陈彦良
Owner AU OPTRONICS CORP
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