Display Pixel Layout With Embedded Sensors for Biometric Recognition
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Solution Overview
Problem
Existing display devices face challenges in achieving improved sensing performance for biometric information recognition, particularly in terms of accuracy and efficiency.
Innovation Solution
The display device incorporates a pixel layer with a specific arrangement of light emitting elements and light sensing elements, including differently shaped and sized first, second, and third light emitting elements, and a light sensing element, all connected via a sensor drive circuit and routing wires, to enhance biometric information recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional sensor arrangement is used, then the device structure is simple, but the sensing performance for biometric information recognition is insufficient
Solution Approach 1:
The sensor array is divided into multiple types of sensing elements (first type, second type, third type) with different shapes and sizes. Each sensing element type is strategically positioned to detect different aspects of biometric information, thereby improving overall measurement precision through functional segmentation of the sensing system.
Solution Approach 2:
Different sensing elements are assigned different local properties (shapes and sizes) optimized for their specific detection roles. The first type, second type, and third type sensing elements each have unique geometric characteristics that enhance their sensitivity to specific biometric features, implementing local quality optimization across the sensor array.
2Measurement precision
If multiple differently shaped light emitting and sensing elements are arranged, then biometric recognition accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into standardized steps for forming different sensing element types. By dividing the fabrication into repeatable modules for first type, second type, and third type elements, the complexity of manufacturing multiple shapes is managed through systematic process segmentation rather than custom fabrication for each element.
Solution Approach 2:
The manufacturing approach utilizes parameter changes in the formation process to create different sensing element shapes and sizes from the same base structure. By varying geometric parameters (shape, size, orientation) during fabrication rather than using completely different manufacturing methods for each element type, ease of manufacture is maintained while achieving diverse sensing element characteristics.
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 enhances the sensing performance of biometric information recognition, improving accuracy and efficiency by optimizing the interaction between light emitting and sensing elements.
Implementation Method 1
Each of the plurality of sensors may include a light sensing element
Data Source
AI summary
A display device includes a base layer and a pixel layer that is disposed on the base layer and that includes a plurality of reference pixel units and a plurality of sensors. Each of the plurality of reference pixel units includes a first light emitting element, a second light emitting element, and a third light emitting element. Each of the plurality of sensors includes a light sensing element disposed between two second light emitting elements adjacent to each other in a first direction and disposed between the first and third light emitting elements in a second direction intersecting the first direction. The second light emitting element has a different shape from the first and third light emitting elements, and the light sensing element has a different shape from the first and third light emitting elements.