In-Cell Display Sensor Layout for Uniform Optical Sensing
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Solution Overview
Problem
Existing display technologies fail to provide a solution for satisfying resolution conditions of pixels and optical sensors. The display device fails to generate sensing information of uniform quality.
Innovation Solution
A display device with a circuit layer including pixel and sensor circuits, and an element layer with light-emitting and light-receiving elements, where the planar distances between specific light-receiving elements are maintained to ensure uniform sensing information generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pixels and optical sensors are formed in the same process to achieve in-cell display integration, then device functionality is improved, but manufacturing precision and resolution uniformity deteriorate due to varying distances between light-receiving elements
Solution Approach 1:
The patent applies asymmetry by configuring light-receiving elements in a non-uniform pattern where different types of light-receiving elements (first, second, third, fourth) are positioned at different locations with different planar distances to their respective light-emitting elements. This asymmetric arrangement compensates for the varying optical path lengths and ensures that sensing information from different regions maintains uniform quality despite the integrated structure.
Solution Approach 2:
The patent implements local quality by assigning different spatial configurations to different light-receiving elements based on their specific functional requirements. Each light-receiving element type has optimized planar distances to corresponding light-emitting elements, allowing local optimization of sensing performance while maintaining overall integration. This ensures that each region of the sensor array achieves uniform sensing quality tailored to its position.
2Measurement precision
If uniform sensing information quality is generated across all optical sensors, then measurement precision is improved, but device complexity increases due to additional structural configurations
Solution Approach 1:
The patent applies universality by using the same basic light-receiving element structure across different positions and types, rather than employing fundamentally different structures for different sensing regions. The uniformity of sensing quality is achieved through spatial arrangement and planar distance control rather than through complex structural variations, allowing a single element design to serve multiple sensing functions throughout the display.
3Measurement precision
If planar distances between light-receiving elements are optimized for uniform sensing quality, then measurement precision is improved, but ease of manufacture deteriorates due to stricter positioning requirements
Solution Approach 1:
The patent applies parameter changes by systematically varying the planar distances between different types of light-receiving elements and their corresponding light-emitting elements. Instead of maintaining uniform distances, the invention optimizes specific distance parameters for each element type to compensate for positional variations, achieving uniform sensing quality through controlled parameter variation rather than through complex manufacturing processes.
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
The display device satisfies resolution conditions of pixels and optical sensors while generating sensing information of uniform quality.
Implementation Method 1
light-emitting elements connected to the pixel circuits
Implementation Method 2
light-receiving elements connected to the sensor circuits
Data Source
AI summary
A display device of the present disclosure includes a circuit layer including pixel circuits and sensor circuits; and an element layer which is positioned on the circuit layer and includes light-emitting elements connected to the pixel circuits and light-receiving elements connected to the sensor circuits, wherein the light-receiving elements include a first light-receiving element, a second light-receiving element, a third light-receiving element, and a fourth light-receiving element, the sensor circuits include: a first sensor circuit connected to the first light-receiving element; a second sensor circuit connected to the second light-receiving element; and a third sensor circuit connected to the third light-receiving element and the fourth light-receiving element, and a planar distance between the first light-receiving element and the third light-receiving element is substantially the same as a planar distance between the second light-receiving element and the fourth light-receiving element.