Display Sensor Node Merging for Higher-SNR Touch Detection
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Solution Overview
Problem
Existing touch panels in display devices face challenges in accurately detecting touches due to weak signal-to-noise ratios, leading to difficulties in proper touch recognition.
Innovation Solution
Incorporating a display device with a pixel, first and second sensors, and connection transistors, where the sensors include light sensing elements and transistors connected through a switching signal to enhance touch recognition by improving signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel is used to enable user interaction, then ease of operation is improved, but measurement precision deteriorates due to weak signal-to-noise ratio
Solution Approach 1:
The patent combines multiple light sensing elements (first light sensing element and second light sensing element) into a single sensor unit. The first connection transistor electrically connects the first sensing node and second sensing node, merging the output signals from both light sensing elements. This combination increases the overall signal strength and improves the signal-to-noise ratio, thereby enhancing touch detection accuracy while maintaining ease of operation.
2Measurement precision
If multiple sensors are added to improve signal quality, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The first connection transistor serves multiple functions: it electrically connects the first sensing node and second sensing node, enables signal combination from multiple light sensing elements, and improves signal-to-noise ratio. By making the transistor multi-functional, the patent achieves enhanced measurement precision without proportionally increasing device 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
Enhances touch recognition performance by improving signal-to-noise ratios, allowing for more accurate detection of user inputs.
Implementation Method 1
The first sensor 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
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.