Pressure Sensor Module for Metal Display Frame
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Solution Overview
Problem
The use of metal phone shells limits the application of capacitive touch and requires mechanical buttons, which compromise the dustproof and waterproof performance of mobile devices.
Innovation Solution
A display device with a pressure sensor module comprising a flexible circuit board, resistance connection circuit, and fullerene resistors, which allows for pressure touch functionality without the need for mechanical buttons, enhancing dustproof and waterproof performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mechanical buttons are used on the side of a metal cover, then the process is simple and production cost is low, but the overall dustproof and waterproof performance of the mobile phone is greatly reduced
Solution Approach 1:
The patent replaces the mechanical button system with a pressure-sensitive touch system. A pressure-sensitive layer is applied over the metal cover surface, detecting pressure through changes in electrical resistance when pressed, eliminating the need for physical buttons and holes in the metal cover, thus maintaining dustproof and waterproof performance while enabling button functionality
Solution Approach 2:
The patent uses a flexible pressure-sensitive layer (thin film) that can be applied directly onto the metal cover surface. This flexible film contains pressure-sensitive resistors that detect touch input without requiring structural modifications to the metal cover, preserving its integrity and sealing properties
2Ease of manufacture
If mechanical buttons are used on the side of a metal cover, then production cost is low, but the overall appearance of the mobile phone is greatly affected
Solution Approach 1:
The mechanical button protrusions are replaced by a flush pressure-sensitive touch layer that maintains the smooth, continuous surface of the metal cover. The touch functionality is achieved through electrical resistance changes in the pressure-sensitive layer rather than physical deformation, preserving the aesthetic appearance
Solution Approach 2:
The patent merges the button functionality with the metal cover surface itself by applying the pressure-sensitive layer directly onto it. The button areas become indistinguishable from the surrounding cover surface, creating a unified, seamless appearance while maintaining all button functions
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 solution enables pressure touch functionality on metal surfaces without compromising dustproof and waterproof performance, simplifying the device structure and improving user interaction.
Implementation Method 1
the pressure sensor comprises a flexible circuit board, a resistance connection circuit, and a plurality of resistors... material of the resistors comprises fullerene
Data Source
AI summary
A display device and a manufacturing method of the same are provided. The display device includes a frame, a pressure sensor, and a pressure sensing module. When a touch portion receives external pressure, a resistance value of the resistor changes, and a corresponding pressure sensing signal is output. The pressure sensing module outputs an execution signal according to the pressure sensing signal to realize a pressure touch function on a side of the frame. This eliminates a need to make holes in a side of the frame, which eliminates a mechanical button and improves dustproof and waterproof performance of the display device.