Display Sensor Layout for Biometric and Touch Detection
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Solution Overview
Problem
Existing display devices lack the capability to efficiently integrate biometric information detection and touch sensing functionalities without increasing thickness or complexity.
Innovation Solution
A display device incorporating a sensor system with light sensing elements and a driving circuit that allows for simultaneous biometric information detection and touch sensing, utilizing a unique arrangement of light sensing anodes and a switching circuit to manage different sensing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate sensors are added for biometric detection and touch sensing, then sensing functionality is improved, but device thickness increases
Solution Approach 1:
The patent combines biometric detection and touch sensing functions into a single sensor layer by arranging light sensing anodes in different rows (first row for biometric, second row for touch) that share common connection lines and readout circuits, eliminating the need for separate sensor layers and reducing overall device thickness
Solution Approach 2:
The sensor system is designed to perform multiple functions using the same hardware infrastructure - the light sensing anodes and connection lines serve both biometric detection and touch sensing purposes by switching between different readout modes, thereby maintaining versatility without adding thickness
2Adaptability or versatility
If separate sensor systems are integrated for biometric and touch functions, then sensing capability is improved, but device complexity increases
Solution Approach 1:
The patent merges biometric detection and touch sensing into a unified sensor system where light sensing anodes are arranged in multiple rows sharing common connection lines and readout circuits, reducing the number of independent sensor systems and simplifying overall device architecture
Solution Approach 2:
The sensor system dynamically switches between biometric detection mode and touch sensing mode by activating different row groups and adjusting readout parameters, allowing a single static hardware configuration to perform multiple functions without requiring complex dedicated circuits for each mode
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 thin, flexible display devices capable of biometric information and touch input detection, reducing thickness and enhancing versatility by integrating multiple sensing functions without additional layers.
Implementation Method 1
a plurality of sensors, each of which includes a light sensing element
Data Source
AI summary
A display device includes a plurality of pixels, each of which includes a light emitting element, a plurality of sensors, each of which includes a light sensing element and a sensor driving circuit, and a readout circuit that receives a sensing signal output from the plurality of sensors. The plurality of sensors includes first row light sensing anodes positioned in a first row, second row light sensing anodes positioned in a second row, and an anode connection line that electrically connects y light sensing anodes among the first row light sensing anodes and the second row light sensing anodes with each other, where y is a positive integer.