Touch Panel Switch Layout for Dual-Sided PCB Component Integration
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Solution Overview
Problem
Conventional touch sensing devices cannot utilize the face of the circuit board mounting the touch sensor for additional components due to the placement of the switch and movable parts, limiting the integration of electronic components like light emitting or display devices.
Innovation Solution
A touch sensing device configuration that allows electronic components to be mounted on the circuit board face opposite to the touch sensor, with the detection switch positioned between the circuit board and a coupling member, enabling the sharing of a single circuit board and reducing the overall component count by eliminating the need for a separate board for the detection switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switch is mounted on the face on the touch sensor side of the circuit board with the movable portion interposed between the touch sensor and the switch, then the pressing operation can be detected, but the face on the touch sensor side of the circuit board cannot be used for mounting other electronic components
Solution Approach 1:
The invention moves the switch from the traditional configuration (on the touch sensor side) to the opposite side of the circuit board. This spatial reconfiguration allows the touch sensor side to be used for mounting electronic components while the switch remains functional on the other side, effectively utilizing both sides of the circuit board for different purposes.
2Reliability
If a separate circuit board is added to mount the detection switch, then the detection switch can be properly positioned, but the number of components increases
Solution Approach 1:
The invention integrates the detection switch onto the same circuit board that mounts the touch sensor and other electronic components, specifically on the opposite side of the circuit board. This consolidation eliminates the need for a separate circuit board for the detection switch, reducing the total number of components while maintaining proper positioning and functionality.
3Adaptability or versatility
If the electronic component is mounted on the first face of the circuit board, then the optical path can be formed, but the detection switch cannot be mounted on the same face
Solution Approach 1:
The invention divides the circuit board into two functional sides: the first face (touch sensor side) is dedicated to mounting electronic components and forming optical paths, while the second face (opposite side) is used for mounting the detection switch. This segmentation allows each side to serve its specific purpose without interference, enabling both electronic component integration and detection switch mounting on the same circuit board.
Data Source
AI summary
A touch sensing device including an panel including an operation face, a touch sensor fixed to the panel, a circuit board being spaced from the opposite face opposite to the operation face of the panel, an electronic component on a first face of the board, an opposing part in opposing spaced relation to a second face of the board, a coupling member coupling the panel to the board on an outer side relative to the touch sensor and the electronic component, and a switch between the second face of the board and the opposing part. An optical path extends from the electronic component through the touch sensor and the panel. The board relatively approaches the opposing part in accordance with the forward movement of the panel and relatively moves away from the opposing part in accordance with the backward movement of the panel. The switch produces or changes an output signal in accordance with the approach of the board.