Integrated Display Light-Receiving Elements for Fingerprint Sensing
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Solution Overview
Problem
Existing display devices face challenges in integrating fingerprint sensors as separate modules, which can increase complexity and reduce the overall efficiency and aesthetic appeal.
Innovation Solution
Incorporating a light emitting element with a pixel circuit, a first and second light receiving element, and a dummy circuit pattern, along with a sensing circuit, to enhance the integration of fingerprint sensors within the display device, allowing for improved functionality and design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fingerprint sensor is integrated as a separate module within the display device, then the display device can perform fingerprint recognition functionality, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines the fingerprint sensor with the display panel by integrating the light receiving element into the display structure. The fingerprint sensor shares the same substrate and packaging structure as the display panel, merging two previously separate components into a unified structure that reduces overall complexity while maintaining functionality.
Solution Approach 2:
The display panel structure is designed to serve multiple functions: it acts as both the display interface and the housing for the fingerprint sensor. The light receiving element is positioned within the display area, allowing the same structural framework to support both display and biometric authentication operations.
2Adaptability or versatility
If a light receiving element is disposed adjacent to the light emitting element, then the fingerprint sensor can be integrated within the display area, but the display area coverage is reduced
Solution Approach 1:
The patent applies local quality by positioning the light receiving element specifically in the non-display area adjacent to the display area, rather than distributing it throughout the entire display surface. This localized placement enables fingerprint sensor integration while preserving maximum display area coverage in the central region.
Solution Approach 2:
The light receiving element is disposed in the vertical dimension (adjacent to the light emitting element in the layered structure) rather than occupying horizontal display space. This dimensional repositioning allows the fingerprint sensor components to be integrated within the display device footprint without reducing the active display area.
3Manufacturing precision
If a dummy circuit pattern is disposed below the light receiving element, then the structural symmetry and manufacturing consistency are improved, but the device complexity increases
Solution Approach 1:
The dummy circuit pattern is a simplified copy or replica of the actual circuit patterns used in the display device. It replicates the general structural characteristics and layout style of functional circuits without containing actual circuit functionality, thereby providing manufacturing consistency and symmetry while minimizing added 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 configuration enables efficient integration of fingerprint sensors, enhancing the display device's functionality and aesthetic appeal while maintaining operational efficiency.
Implementation Method 1
a first light receiving element adjacent to the light emitting element; a sensing circuit disposed below the first light receiving element and electrically connected to the first light receiving element
Data Source
AI summary
A display device includes a light emitting element, a pixel circuit disposed below the light emitting element and electrically connected to the light emitting element, a first light receiving element disposed adjacent to the light emitting element, a sensing circuit disposed below the first light receiving element and electrically connected to the first light receiving element, a second light receiving element spaced apart from the first light receiving element and electrically connected to the sensing circuit and adjacent to the light emitting element, and a dummy circuit pattern disposed below the second light receiving element.