Micro LED Display Panel with Integrated Photo Sensor for Fingerprint Detection
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Solution Overview
Problem
Conventional electronic devices with fingerprint identification functions face increased size due to dedicated panels and suffer from reduced display brightness due to optoelectronic sensing panels blocking light.
Innovation Solution
A micro LED display device with a substrate and driving layer containing micro LEDs and photo sensors, where the micro LEDs emit light to detect fingerprints, and the photo sensors generate sensing signals for fingerprint determination, integrated into a display panel to serve both as a display and fingerprint detection interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a specific panel is added for fingerprint detection, then fingerprint identification function is achieved, but the size of the electronic apparatus increases
Solution Approach 1:
The patent combines the display panel and fingerprint sensing panel into a single integrated structure. The display panel comprises both display elements (micro LEDs) and sensing elements (photo sensors) arranged in the same pixel structure, eliminating the need for separate fingerprint detection panels and reducing overall device size.
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both a display interface and a fingerprint identification interface. Each pixel contains both light-emitting components for display and light-sensing components for fingerprint detection, enabling one component to perform multiple roles.
2Adaptability or versatility
If an optoelectronic sensing panel is disposed over a display panel, then fingerprint detection is enabled, but the display brightness is reduced due to light blocking
Solution Approach 1:
The sensing elements are integrated within the display panel structure rather than being placed as a separate overlay. The photo sensors are positioned at the same level as the micro LEDs, allowing light to be emitted and sensed without passing through an additional sensing panel that would block or attenuate the light.
Solution Approach 2:
The patent uses the transparent substrate and driving layer as intermediaries to enable both light emission and light sensing. These layers allow light to pass through while providing structural support and electrical connections, facilitating both display and fingerprint detection functions without compromising brightness.
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
Enables compact fingerprint detection without obstructing display brightness, allowing the device to function as both a touch and fingerprint identification panel, enhancing user security and device usability.
Implementation Method 1
The driving layer comprises a micro LED and a photo sensor. When the micro LED emits light to a finger of a user
Implementation Method 2
the photo sensor generates a sensing signal according to the detect light
Data Source
AI summary
A micro light-emitting diode (LED) display panel is provided. The micro LED display panel includes a substrate and a driving layer. The driving layer is disposed on the substrate. The driving layer includes a micro LED and a photo sensor. When the micro LED emits light to a finger of a user, the photo sensor generates a sensing signal.