Capacitive Touch Switch for Full-Flat Display Frames
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Solution Overview
Problem
Full-flat image display devices with large screens face challenges in integrating capacitive touch switches due to high processing costs and design impairments, especially when using thick glass, which requires complex capacitance detection sheets and increases costs and assembly inefficiencies.
Innovation Solution
A capacitive touch switch design that includes a substrate with an electrode and a conductive member interposed between the panel and the electrode, allowing for a shared glass surface and reducing capacitance coupling errors, thus enabling an inexpensive and easily assembled full-flat image display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a capacitive touch switch is provided on the frame part of a large-screen full-flat image display device, then the device can achieve a sleek integrated design without mechanical buttons, but the capacitance detection sheet cannot be used for the frame part as it is only made according to the display screen size
Solution Approach 1:
The capacitance detection function is segmented from the display screen area and independently implemented on the frame part using a conductive member that can detect capacitance changes locally, allowing the touch switch function to be adapted to the frame structure without requiring a full-size capacitance detection sheet
Solution Approach 2:
The conductive member is specifically positioned and configured at the frame part where the power switch is disposed, providing localized capacitance detection capability tailored to the specific operational needs of the touch switch rather than uniformly covering the entire frame area
2Ease of operation
If a capacitance detection sheet larger than the display screen is used to enable touch switch on the frame, then the touch function can be extended to the frame part, but the frame part spreads to parts other than where the power switch is disposed, impairing the design and causing problems when multi-screen is structured
Solution Approach 1:
The capacitance detection area is segmented and limited only to the specific location where the power switch is disposed on the frame, rather than extending across the entire frame perimeter, thus maintaining a clean frame design and enabling proper multi-screen configuration
3Ease of operation
If a capacitance detection sheet not in accordance with the display screen size is ordered, then the touch switch can be positioned on the frame, but the burden of cost increases
Solution Approach 1:
A localized conductive member is used at the specific touch switch position on the frame rather than ordering a custom-sized capacitance detection sheet, utilizing standard components in a localized application to reduce manufacturing burden and cost
4Ease of operation
If multiple small-area capacitance detection sheets are connected to form a touch panel and switch, then the touch function can be implemented on the frame, but components other than the detection sheets such as cable wires become necessary, increasing burden of cost and deteriorating assembly efficiency
Solution Approach 1:
The conductive member integrates multiple functions into a single component: it serves as both the capacitance detection element and the structural element positioned between the panel and electrode, eliminating the need for separate cable wires and connection components, thus simplifying assembly and improving production efficiency
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 solution reduces the complexity and cost of assembly while preventing unintended capacitance coupling, enhancing the reliability and efficiency of touch operations on large-screen devices.
Implementation Method 1
a capacitive touch switch that performs switching by detecting a finger based on a change in capacitance that is caused when the linger comes close to a panel
Implementation Method 2
a conductive member corresponding to the electrode, where the conductive member is fixed by being interposed between the panel and the electrode
Data Source
AI summary
An image display device comprising a capacitive touch switch that performs switching by detecting a finger based on a change in capacitance that is caused when the finger comes close to a panel, wherein the touch switch comprises the panel, a substrate on which an electrode for detecting capacitance is mounted, and a conductive member corresponding to the electrode, and the conductive member is provided between the panel and the electrode, and is fixed by being interposed between the panel and the electrode.