Inclined Sensor Bar Force Detection for Display Panels
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Solution Overview
Problem
Existing display apparatuses face challenges in uniformly sensing touch pressure across different touch positions due to the complex structure and thickness of force sensors, require a large number of sensors, and experience accuracy issues with long-term use and installation difficulties.
Innovation Solution
A display apparatus design featuring a force sensor module with sensor bars inclined from the center to the periphery of a main frame, integrated using stem rods, and strain gauges on sensor rods, allowing for efficient pressure sensing with a minimal number of sensors and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force sensors are disposed in several layers behind the display module, then pressure sensing capability is achieved, but the structure becomes complicated and thickness increases
Solution Approach 1:
The force sensor is extracted from the multi-layer display module structure and repositioned to be located between the guide panel and main frame. This extraction simplifies the overall structure by removing the need for complex multi-layer integration while maintaining pressure sensing capability through the inclined sensor bar configuration
Solution Approach 2:
The force sensor is repositioned from a vertical multi-layer arrangement to a horizontal arrangement between the guide panel and main frame. The sensor bar is inclined at an angle, utilizing spatial dimensionality to achieve pressure sensing without increasing display module thickness, thus resolving the contradiction between sensing capability and structural simplicity
2Ease of manufacture
If force sensor is disposed at an edge of the display, then installation is simplified, but uniform pressure sensing across different touch positions cannot be achieved
Solution Approach 1:
The sensor bar is configured with an inclined structure rather than a vertical or horizontal alignment, creating an asymmetric geometry that optimizes pressure detection. The inclination angle allows the sensor to effectively measure pressure forces applied at various positions on the display surface, improving uniformity while maintaining ease of installation between the guide panel and main frame
3Measurement precision
If a large number of force sensors are used to sense pressure uniformly, then pressure detection accuracy improves, but device complexity and cost increase
Solution Approach 1:
The inclined sensor bar configuration serves multiple functions: it can detect pressure forces applied at various positions on the display surface, compensate for force distribution variations, and maintain accurate pressure sensing with a minimal number of sensors. This multi-functional design eliminates the need for multiple sensors while preserving detection accuracy across different touch positions
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 design reduces pressure detection deviation, enables accurate touch pressure sensing across various positions, and simplifies sensor installation, while maintaining a slim profile and minimizing fatigue.
Implementation Method 1
a strain gauge installed on each of the plurality of sensor rods
Data Source
AI summary
A display apparatus includes: a display panel, a guide panel coupled to a rear surface of the display panel, a main frame coupled to the guide panel, and a force sensor module disposed between the guide panel and the main frame. The force sensor module includes: a sensor bar including one or more sensor rods, the one or more sensor rods extending from a central portion of the main frame toward a peripheral portion of the main frame, and a strain gauge provided at each of the one or more sensor rods.