Integrated Touch Panel Pressure Sensor Design
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Solution Overview
Problem
The manufacturing process of touch panels with pressure-sensitive sensors is cumbersome due to the additional steps required to mount the pressure-sensitive sensor onto the housing and the touch panel, leading to increased manufacturing time and cost.
Innovation Solution
Integrating a pressure-sensitive sensor onto the touch sensor substrate, eliminating the need for separate mounting steps by using a dielectric sheet and conductive members to form the pressure-sensitive sensor, which is connected to the touch panel's electrodes, thereby simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure-sensitive sensor is mounted onto the marginal portion of the housing separately, then the pressure detection function is achieved, but the manufacturing time increases due to additional mounting steps
Solution Approach 1:
The pressure-sensitive sensor is merged with the touch panel by forming electrodes directly on the touch sensor substrate. The first and second electrodes are disposed on the inner peripheral portion of the front surface of the touch sensor substrate, and a conductive member is disposed between the touch sensor substrate and the protective plate, creating an integrated pressure detection structure that eliminates separate mounting steps.
2Reliability
If the pressure-sensitive sensor is mounted onto the marginal portion of the housing, then the pressure detection function is achieved, but the manufacturing process complexity increases due to additional mounting steps
Solution Approach 1:
The pressure-sensitive sensor is merged with the touch panel by forming electrodes directly on the touch sensor substrate. The first and second electrodes are disposed on the inner peripheral portion of the front surface of the touch sensor substrate, and a conductive member is disposed between the touch sensor substrate and the protective plate, creating an integrated pressure detection structure that eliminates separate mounting steps.
Solution Approach 2:
The touch sensor substrate serves multiple functions: it acts as both the touch sensing element and the base for the pressure-sensitive sensor electrodes. The first and second electrodes on the touch sensor substrate serve dual purposes as both touch panel components and pressure detection elements, reducing the need for separate dedicated pressure sensor components.
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 integration reduces manufacturing time and cost by eliminating unnecessary steps and enhances the touch panel's sensitivity and durability while maintaining display quality and reducing erroneous inputs.
Implementation Method 1
a first dielectric sheet provided between the touch sensor substrate and the protective plate
Implementation Method 2
the first electrode, the second electrode, and the conductive member constitute a pressure-sensitive sensor
Data Source
AI summary
A touch panel according to the present invention includes a touch sensor substrate having a touch sensor portion in the central portion of the touch sensor substrate and having a first electrode and a second electrode in the inner peripheral portion of the touch sensor substrate, a protective plate to cover the front surface of the touch sensor substrate, a dielectric sheet provided between the touch sensor substrate and the protective plate, and a conductive member disposed at a position so as to face the first electrode and the second electrode, wherein the first electrode, the second electrode, and the conductive member constitute a pressure-sensitive sensor. With this structure, a touch panel having a pressure-sensitive sensor and a display device provided with the touch panel can be manufactured without an increase in the manufacturing time.