OLED Display Panel Full-Screen Fingerprint Recognition Integration
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Solution Overview
Problem
Conventional OLED display devices cannot integrate fingerprint recognition technology for full-screen recognition due to the complex structure of capacitance fingerprint sensing devices, which enlarges the non-display area and disrupts the overall display structure.
Innovation Solution
An OLED display panel with a glass substrate and transparent substrate laminated with pixel units that emit light of multiple colors, incorporating light receiving units on the transparent substrate between pixel units for fingerprint recognition, allowing for full-screen integration without obstructing the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional capacitance fingerprint sensing device is separately arranged in the non-display area, then fingerprint recognition function is achieved, but the non-display area is enlarged and the overall structure is disrupted
Solution Approach 1:
The patent merges the fingerprint sensing function with the display structure by integrating light receiving units directly into the display panel's transparent substrate. This combines two previously separate functions (display and fingerprint recognition) into a single integrated structure, eliminating the need for separate fingerprint sensing devices in the non-display area.
Solution Approach 2:
The transparent substrate serves multiple functions: it acts as both the display window and the mounting platform for light receiving units that perform fingerprint sensing. This multi-functional design allows the same structural component to fulfill both display and biometric authentication roles, reducing the overall device footprint.
2Reliability
If a conventional capacitance fingerprint sensing device is separately arranged, then fingerprint recognition is achieved, but the structure becomes complicated
Solution Approach 1:
The patent combines the fingerprint sensing structure with the existing display panel structure. The light receiving units are integrated into the transparent substrate that is already part of the display assembly, eliminating the need for separate fingerprint sensing modules and reducing overall structural complexity.
3Adaptability or versatility
If light receiving units are arranged on the transparent substrate between pixel units, then full-screen fingerprint recognition is achieved, but the display area may be affected
Solution Approach 1:
The patent applies local quality by placing light receiving units specifically in the gap regions between adjacent pixel units rather than uniformly across the entire display area. This localized arrangement utilizes the existing structural gaps in the pixel array, allowing fingerprint sensing functionality without requiring additional display area or interfering with the pixel structure.
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 accurate and simple full-screen fingerprint recognition while maintaining the display functionality, enhancing safety and operability by integrating fingerprint recognition into the OLED display technology.
Implementation Method 1
a plurality of light receiving units are arranged on a surface of the second side, and an orthographic projection of each light receiving unit on the transparent substrate is located in a gap between the adjacent pixel units
Data Source
AI summary
An organic light-emitting diode display panel for fingerprint recognition includes a glass substrate, a pixel layer, and a transparent substrate, which are laminated; the pixel layer includes a plurality of pixel units arranged on the glass substrate in arrays, wherein the plurality of pixel units are configured to emit light of multiple colors which are combined to form a colorful image; the transparent substrate includes a first side and a second side, which are disposed opposite to each other, the first side is fitted on the pixel layer, a plurality of light receiving units are arranged on a surface of the second side, and an orthographic projection of each light receiving unit on the transparent substrate is located in a gap between the adjacent pixel units. An electronic device is also provided.