Micro LED Display With Underlying Optical Fingerprint Sensor
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Solution Overview
Problem
Conventional portable electronic devices using optical fingerprint sensing technology face issues with moisture and dust ingress, potentially leading to short-circuits and damage, and compromise the aesthetic appearance due to the need for a transparent window or opening for fingerprint recognition.
Innovation Solution
A portable electronic device design featuring a micro LED display with an optical fingerprint sensing unit embedded beneath, utilizing a complementary metal-oxide-semiconductor chip and flexible printed circuit board, and an anti-glare film layer, with a light guide layer to enhance signal strength and maintain a uniform appearance by eliminating the need for a separate transparent window or opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent window or opening is provided for optical fingerprint sensing, then fingerprint recognition function is achieved, but moisture or dust may enter the device and appearance uniformity is compromised
Solution Approach 1:
The patent merges the fingerprint sensing function with the display module by integrating the optical fingerprint sensing unit beneath the display screen. This combination eliminates the need for a separate transparent window or opening, as the display module itself serves as the interface for both visual output and fingerprint recognition, thereby maintaining device sealing and appearance uniformity while achieving fingerprint recognition functionality
Solution Approach 2:
The display module is designed to perform multiple functions: it serves as both the visual display interface and the fingerprint sensing interface. By making the display module universal for both purposes, the patent eliminates the need for dedicated fingerprint openings, thus preventing moisture and dust ingress while maintaining aesthetic appearance
2Adaptability or versatility
If a transparent window or opening is provided for optical fingerprint sensing, then fingerprint recognition function is achieved, but the uniform and aesthetically-pleasing appearance is influenced
Solution Approach 1:
The patent merges the fingerprint sensing function with the display module by integrating the optical fingerprint sensing unit beneath the display screen. This combination eliminates the need for a separate transparent window or opening, as the display module itself serves as the interface for both visual output and fingerprint recognition, thereby maintaining device sealing and appearance uniformity while achieving fingerprint recognition functionality
Solution Approach 2:
The display module is designed to perform multiple functions: it serves as both the visual display interface and the fingerprint sensing interface. By making the display module universal for both purposes, the patent eliminates the need for dedicated fingerprint openings, thus preventing moisture and dust ingress while maintaining aesthetic appearance
3Adaptability or versatility
If optical fingerprint sensing unit is located under a separate transparent window, then fingerprint recognition is enabled, but device complexity increases
Solution Approach 1:
The patent merges the fingerprint sensing function with the display module by integrating the optical fingerprint sensing unit beneath the display screen. This combination eliminates the need for a separate transparent window or opening, as the display module itself serves as the interface for both visual output and fingerprint recognition, thereby maintaining device sealing and appearance uniformity while achieving fingerprint recognition functionality
Solution Approach 2:
The display module is designed to perform multiple functions: it serves as both the visual display interface and the fingerprint sensing interface. By making the display module universal for both purposes, the patent eliminates the need for dedicated fingerprint openings, thus preventing moisture and dust ingress while maintaining aesthetic appearance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents moisture and dust ingress while maintaining the device's aesthetic appeal and enhancing fingerprint recognition accuracy, reducing power consumption, and extending operating time by integrating fingerprint recognition into the display module.
Implementation Method 1
an optical fingerprint sensing unit captures the light beam that is reflected from the surface of the finger
Implementation Method 2
The second display module includes a micro LED display and an optical fingerprint sensing unit
Data Source
AI summary
A portable electronic device includes a first casing and a second casing. The first casing includes a first display module. The second casing includes a second display module. The second casing and the first casing are combined together. The second display module includes a micro LED display and an optical fingerprint sensing unit. The optical fingerprint sensing unit is located under the micro LED display.