Dual-Sensor Display Panel Switching for Noise-Robust Touch Detection
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Solution Overview
Problem
Existing touch panels in display devices face challenges with weak signal-to-noise ratios, making it difficult to accurately detect user inputs, particularly in environments with high noise levels.
Innovation Solution
A display device incorporating a pixel with a first and second sensor, connected by a connection transistor, and a driving controller that selectively activates these transistors based on signal-to-noise ratio thresholds to enhance touch recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single sensor is used in the touch panel, then the device complexity is low, but the signal to noise ratio is weak making it difficult to properly detect a touch
Solution Approach 1:
The patent combines multiple sensors (first sensor and second sensor) to detect touch events. The sensors work together to provide multiple sensing signals that are processed to determine touch location and characteristics. This merging of sensors improves the signal to noise ratio and touch detection accuracy while managing device complexity through integrated sensor arrays within the touch panel structure.
2Reliability
If multiple sensors are added to improve signal to noise ratio, then touch detection accuracy improves, but device complexity increases
Solution Approach 1:
The touch panel integrates multiple sensing functions within a unified structure. The same touch panel structure supports both display functions and multiple sensing modes (touch detection, proximity sensing, etc.). The sensor array and processing circuitry are designed to handle multiple detection tasks simultaneously, improving reliability without proportionally increasing complexity through dedicated separate systems for each function.
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
Improves the accuracy of touch recognition by filtering out noise, ensuring reliable detection of user inputs even in noisy environments.
Implementation Method 1
The first sensor includes a first light sensing element connected to a first sensing node
Data Source
AI summary
A display device which includes a pixel that includes a light emitting element, a first sensor that includes a first light sensing element connected to a first sensing node, a second sensor that includes a second light sensing element connected to a second sensing node, and a first connection transistor that electrically connects the first sensing node of the first sensor and the second sensing node of the second sensor in response to a switching signal.