Self-Luminous Display Module With Optical Fingerprint Sensing Layer
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Solution Overview
Problem
Existing display modules have limited functionality and require structural optimization when integrating with other functions, particularly in combining display and fingerprint imaging capabilities without compromising either function.
Innovation Solution
A display module is designed with a self-luminous OLED display layer and an optical fingerprint sensing layer, where the OLED display layer serves as a light source for fingerprint imaging, eliminating the need for additional lighting and optimizing light transmission through non-opaque and light-blocked regions to ensure effective display and imaging functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a self-luminous display layer is integrated with an optical fingerprint sensing layer, then the functionality of the display module is increased, but the structural complexity increases
Solution Approach 1:
The patent combines the self-luminous display layer and optical fingerprint sensing layer into a single integrated structure. The display layer serves dual purposes: displaying information and providing light for fingerprint sensing. This merging eliminates the need for separate lighting components and reduces overall structural complexity despite adding functionality.
Solution Approach 2:
The self-luminous display layer is designed to perform multiple functions simultaneously: it acts as both the display medium and the light source for fingerprint sensing. This multi-functionality approach allows one component to serve multiple purposes, increasing versatility without proportionally increasing complexity.
2Measurement precision
If the self-luminous display layer is made with non-opaque regions for light transmission, then fingerprint imaging quality is improved, but display quality may be compromised
Solution Approach 1:
The display layer is designed with different optical properties in different regions. Non-opaque regions are created specifically at locations corresponding to the fingerprint sensing layer to allow light transmission for imaging, while other regions maintain full opacity for optimal display quality. This local differentiation allows each region to optimize its specific function.
3Adaptability or versatility
If additional lighting components are added for fingerprint sensing, then imaging function is improved, but device complexity and cost increase
Solution Approach 1:
The self-luminous display layer serves itself by providing the necessary light for fingerprint sensing without requiring external lighting components. The display layer's inherent light-emitting capability is utilized to illuminate the fingerprint area, eliminating the need for separate LEDs or other lighting structures.
Solution Approach 2:
The display layer is designed to perform multiple functions simultaneously: it acts as both the display medium and the light source for fingerprint sensing. This multi-functionality approach allows one component to serve multiple purposes, increasing versatility without proportionally increasing complexity.
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
This integration enables cost-effective and structurally simplified display modules that can perform both information display and fingerprint imaging, expanding their application range while maintaining high-quality imaging and display performance.
Implementation Method 1
each of the display pixels includes a light emitting device, and the light emitting device includes a self-luminous layer
Implementation Method 2
the optical fingerprint sensing layer has a photosensitive pixel region and the photosensitive pixel region includes a plurality of photosensitive pixels
Implementation Method 3
the self-luminous display layer has a light-blocked region located between the self-luminous layer and the optical fingerprint sensing layer, and the light-blocked region is configured to prevent light emitting from the self-luminous layer from reaching the optical fingerprint sensing layer before entering the first substrate
Data Source
AI summary
A display module is provided, which includes: a first substrate and a second substrate disposed face to face, where the first substrate is a non-opaque substrate; a self-luminous display layer disposed between the first substrate and the second substrate, an optical fingerprint sensing layer disposed between the self-luminous display layer and the second substrate, where the optical fingerprint sensing layer has a photosensitive pixel region; the self-luminous display layer has a non-opaque region, at least a portion of light transmitting from the first substrate to the self-luminous display layer can pass through the self-luminous display layer and reach the optical fingerprint sensing layer; and the self-luminous display layer has a light-blocked region located between the self-luminous layer and the optical fingerprint sensing layer which is configured to prevent light emitting from the self-luminous layer from reaching the optical fingerprint sensing layer before entering the first substrate.