Mid-frame Reinforcement for Touch Pressure Detection
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Solution Overview
Problem
Current touch input devices face challenges in efficiently detecting touch positions and pressures on various types and shapes of display panels, particularly in maintaining pressure sensitivity under external forces and preventing deformation.
Innovation Solution
A touch input device design that includes a mid-frame with a reinforcing member and a guide member, along with a pressure sensor, which detects touch and pressure by utilizing a reference potential layer and capacitance changes, ensuring consistent pressure sensitivity even under external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch sensor panel is attached to the front side of a display screen to enable touch input, then the touch screen becomes easy and simple to operate, but the device becomes susceptible to deformation under external forces which affects pressure detection accuracy
Solution Approach 1:
The device is divided into multiple structural layers including a housing, mid-frame, and cover that are separately assembled. The mid-frame is further segmented into a base plate and reinforcing members, allowing each component to be optimized independently for its specific function while maintaining overall structural integrity for reliable pressure detection.
Solution Approach 2:
The base plate is designed with a curved surface rather than a flat structure. This curvature provides structural strength to resist deformation under external forces while maintaining the necessary flexibility for the touch sensor panel to detect pressure accurately, resolving the contradiction between operational simplicity and detection reliability.
2Adaptability or versatility
If various types and shapes of display panels are used to increase versatility, then the touch input device can accommodate different display configurations, but maintaining consistent pressure sensitivity becomes more difficult
Solution Approach 1:
The mid-frame structure with its curved base plate and reinforcing members is designed as a universal support structure that can accommodate various types and shapes of display panels. This universal design maintains consistent pressure sensitivity across different display configurations by providing a standardized, deformation-resistant platform for the touch sensor panel.
3Device complexity
If the touch sensor panel covers the visible side of the display screen to enable touch input, then the interface becomes more integrated, but the base plate becomes more susceptible to deformation under external forces
Solution Approach 1:
The base plate is designed with a curved surface rather than a flat structure. This curvature provides structural strength to resist deformation under external forces while maintaining the necessary flexibility for the touch sensor panel to detect pressure accurately, resolving the contradiction between operational simplicity and detection reliability.
Solution Approach 2:
The mid-frame is segmented into a base plate and separate reinforcing members. This segmentation allows the base plate to maintain its curved, flexible nature for touch detection while the reinforcing members provide additional structural support to prevent deformation, achieving both integration and strength.
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 device effectively detects touch positions and pressures on diverse display panels while maintaining constant pressure sensitivity, preventing deformation and ensuring reliable operation even when subjected to external forces.
Implementation Method 1
a sensor which is disposed between the mid-frame and the cover and detects at least any one of a touch and a pressure
Data Source
AI summary
A touch input device may be provided that includes: a mid-frame; a cover disposed on the mid-frame; a display module disposed between the mid-frame and the cover; and a sensor which is disposed between the mid-frame and the cover and detects at least any one of a touch and a pressure. The mid-frame includes a base plate which includes a top surface and a bottom surface. The mid-frame includes a reinforcing member which is disposed on the top surface of the base plate and is configured to reinforce a strength of the base plate.