Touch Sensitive Cover Plate Backside Wire Integration
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Solution Overview
Problem
Existing touch screen technologies face challenges in integrating touch-sensitive functions into key regions without occupying display space or increasing the thickness of the key region, as functional keys either reduce the display area or require structural space for a flexible printed circuit board.
Innovation Solution
A touch-sensitive cover plate with integrated key patterns and wires on its backside, connected to a circuit board, allows for touch-sensitive functionality without occupying display space and reduces the thickness of the key region by eliminating the need for a flexible circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If virtual functional keys are provided on the LCD display region, then the key function is achieved, but the display region area is reduced
Solution Approach 1:
The patent moves the key patterns from the front display surface to the back side of the cover plate, utilizing the third dimension (depth/thickness) to resolve the conflict between key functionality and display area. This allows keys to be positioned without occupying any display region space.
Solution Approach 2:
The patent separates the key functional elements (patterns and wires) from the display region by placing them on the back side of the cover plate. This segmentation allows independent optimization of both the display area on the front and the key functionality on the back.
2Adaptability or versatility
If a flexible printed circuit board is provided at the back side of the key region to achieve key function, then the key function is achieved, but the key region thickness is increased
Solution Approach 1:
The patent replaces the thick flexible printed circuit board with thin wire elements that can be conformally arranged on the back side of the cover plate. These wires provide the necessary electrical connectivity with minimal thickness increase, maintaining a sleek profile.
Solution Approach 2:
The patent extracts the circuit board function and implements it through individual wire connections directly on the back side of the cover plate, eliminating the need for a separate flexible circuit board layer and thereby reducing overall thickness.
3Adaptability or versatility
If functional keys are integrated into the cover plate key region, then the key function is achieved, but either display area is reduced or key region thickness is increased
Solution Approach 1:
The patent merges the key patterns, wire connections, and circuit board interface into a single integrated structure on the back side of the cover plate. This consolidation achieves touch-sensitive key functionality without requiring separate components for each function, thereby simplifying the overall device structure.
Data Source
AI summary
A touch sensitive cover plate is disclosed. The touch sensitive cover plate includes: a cover plate body having at least one key located in a key region of cover plate body; and at least one wire arranged on a back side of the cover plate body and used for the key. The wire is configured to connect the key to a circuit board located outside of the key region. A method of manufacturing the touch sensitive cover plate and a display device having the touch sensitive cover plate are also disclosed.