Curved Display Touch and Pressure Sensor Integration
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Solution Overview
Problem
Current display devices with touch sensors and pressure sensors face challenges in accurately recognizing touch information and pressure on curved surfaces, leading to instability and uneven sensing performance.
Innovation Solution
A display device with a touch sensor and pressure sensor integrated on a curved surface, utilizing a quantum tunneling composite (QTC) pressure sensing element, where the touch sensor includes sensor pixels that sense capacitance changes and the pressure sensor includes electrodes and a pressure sensing element, allowing for user authentication through both touch and pressure information on a curved surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch and pressure sensors are integrated on a curved surface, then sensitivity and stability are improved, but device complexity increases
Solution Approach 1:
The patent combines touch sensor and pressure sensor into a single integrated sensor assembly mounted on the curved surface. The touch sensor detects contact presence while the pressure sensor measures force magnitude, and both are positioned to work together on the curved surface, improving reliability without requiring separate mounting structures.
Solution Approach 2:
The integrated sensor assembly serves multiple functions: touch detection, pressure measurement, and curved surface adaptation. This multi-functional design improves sensing stability across different interaction types while avoiding the complexity of separate specialized sensors for each function.
2Measurement precision
If sensors are integrated on a curved surface, then user authentication accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sensor assembly is specifically designed to conform to curved surfaces, with the touch and pressure sensors positioned and oriented to work effectively on curved geometry. This curvature-adapted design maintains measurement precision for user authentication while using standard manufacturing tolerances for the curved mount.
3Measurement precision
If quantum tunneling composite pressure sensing element is used, then pressure sensitivity is improved, but device complexity increases
Solution Approach 1:
The quantum tunneling composite material changes its electrical resistance parameters in response to applied pressure. This material-based sensing mechanism achieves high pressure sensitivity through intrinsic material properties rather than complex mechanical structures, maintaining simplicity while improving measurement precision.
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 integration of touch and pressure sensors on a curved surface enhances sensitivity and stability, enabling effective user authentication and control operations based on touch and pressure inputs, improving user experience and security.
Implementation Method 1
the touch sensor includes a plurality of sensor pixels that senses a change in capacitance corresponding to the touch
Implementation Method 2
The pressure sensing element may be a quantum tunneling composite (QTC). The resistance of the pressure sensing element may be changed based on the pressure.
Data Source
AI summary
A display device includes: a display panel including a display area including at least a partially curved surface area; a touch sensor overlapping the display area to acquire touch information on a touch of a user; a pressure sensor to sense a pressure of the touch; and a controller configured to perform user authentication by controlling the display panel, the touch sensor, and the pressure sensor, wherein the touch sensor includes a plurality of sensor pixels that senses a change in capacitance corresponding to the touch, wherein the pressure sensor includes: a first electrode; a second electrode spaced apart from the first electrode; and a pressure sensing element provided between the first electrode and the second electrode.