Display Force Sensing Via Integrated FPC Structure
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Solution Overview
Problem
Current display devices with integrated force sensors have complex manufacturing processes, high costs, and poor stability due to the need for a carrier substrate, FPC, and fragile leads, which also increase thickness and complicate the structure.
Innovation Solution
The force sensing structure is connected to the display device's inherent FPC, eliminating the need for a carrier substrate and separate FPC, and senses capacitance changes between the frame and the force sensing structure, simplifying the structure and reducing manufacturing costs while improving stability and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a carrier substrate, FPC, and force sensing structure are stacked to realize force sensing function, then the force sensing function is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the force sensing structure with the existing FPC of the display device. The FPC serves dual purposes: as the flexible printed circuit for electrical connection and as the carrier substrate for mounting the force sensing structure. This eliminates the need for separate carrier substrate and FPC components, reducing structural complexity while maintaining force sensing functionality.
Solution Approach 2:
The FPC is designed to perform multiple functions simultaneously: it provides electrical connection between components and serves as the mounting substrate for the force sensing structure. This multi-functional design reduces the total number of components needed in the display device.
2Reliability
If a carrier substrate, FPC, and force sensing structure are stacked to realize force sensing function, then the force sensing function is achieved, but the manufacturing cost increases
Solution Approach 1:
By combining the force sensing structure mounting function with the existing FPC, the patent eliminates the need for separate carrier substrate and FPC components. This reduces material costs and simplifies the manufacturing process, as fewer components need to be sourced, handled, and assembled.
Solution Approach 2:
The FPC's multi-functional design allows it to serve both as the electrical connection medium and as the structural carrier for the force sensing structure, reducing overall component count and manufacturing complexity.
3Reliability
If a carrier substrate, FPC, and force sensing structure are stacked to realize force sensing function, then the force sensing function is achieved, but the device thickness increases
Solution Approach 1:
The patent integrates the force sensing structure mounting function into the existing FPC layer, eliminating the need for additional carrier substrate layers. This integration reduces the overall stacking height and thickness of the display device while maintaining the force sensing capability.
4Reliability
If leads are used to connect force sensing structure, then the force sensing function is achieved, but the stability decreases due to fragile leads
Solution Approach 1:
The patent eliminates the need for separate leads by integrating the electrical connection function directly into the FPC structure. The FPC provides both mechanical support and electrical connection pathways, removing the fragile lead component that would otherwise connect the force sensing structure to the control circuit.
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 configuration simplifies the manufacturing process, reduces costs, enhances stability, and maintains device thickness, ensuring reliable force sensing without the need for additional components.
Implementation Method 1
senses a force value by utilizing changes of a gap between the force sensing structure of the force sensor and the frame
Data Source
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AI summary
The present disclosure discloses a display device and a terminal, and belongs to the field of display technologies. The display device includes a controller, a frame, a display panel, an FPC and a force sensing structure. The force sensing structure is connected to the controller by the FPC. Since the FPC is an inherent FPC in the display device, there is no need to provide the force sensing structure with a carrier substrate, an FPC, etc., thereby simplifying the structure of the display device. Therefore, the problem that the display device in the related art has a complicated structure is solved, and the manufacturing cost of the display device having the force sensing function is reduced to some extent.