Mirror cabinet capable of preventing mirror capacitive touch button from touch missoperation
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Solution Overview
Problem
Capacitive touch buttons in mirror cabinets experience misoperation due to high-frequency radiation signals from the high-frequency switching power supply, causing interference and instability in the touch system.
Innovation Solution
A metal component is connected to the ground terminal of the controller, forming a capacitor with a capacitance value at least 10 times larger than the original capacitor between the metal plating layer and the touch panel, along with a safety capacitor connected to the ground, to divert high-frequency interference signals and reduce their impact on the touch panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a capacitive touch panel is installed on the mirror surface to control LED lights, then the ease of operation is improved, but the reliability deteriorates due to high-frequency radiation interference causing touch misoperation
Solution Approach 1:
The patent introduces a metal component as an intermediary element between the high-frequency switching power supply and the capacitive touch panel. This metal component forms a parasitic capacitor that acts as a signal diversion path, intercepting high-frequency radiation signals before they reach the touch panel and redirecting them to ground, thereby protecting the touch panel from interference while maintaining touch control functionality
Solution Approach 2:
The patent converts the harmful high-frequency radiation signals into a beneficial effect by utilizing the parasitic capacitor formed by the metal component. Instead of blocking or filtering the signals actively, the design allows the parasitic capacitor to naturally form and redirect the interference signals to ground, transforming the harmful radiation into a protective mechanism that stabilizes the touch panel
2Productivity
If the high-frequency switching power supply is placed near the mirror surface to power LED lights, then the productivity is improved, but the object-affected harmful factors worsen due to high-frequency radiation signals interfering with the touch panel
Solution Approach 1:
The metal component serves as an intermediary shield positioned between the high-frequency switching power supply and the capacitive touch panel. It creates a controlled parasitic capacitor that captures and redirects high-frequency radiation signals to ground, preventing these harmful signals from affecting the touch panel while allowing the power supply to operate efficiently near the mirror surface
3Shape
If the metal plating layer is kept intact on the mirror surface for aesthetic purposes, then the appearance quality is improved, but the device complexity increases due to the need for additional metal components and grounding structures to prevent interference
Solution Approach 1:
The patent applies local quality by introducing a metal component only in the specific area behind the mirror surface where the capacitive touch panel is located, rather than modifying the entire mirror structure. This localized approach maintains the overall aesthetic appearance of the mirror while adding interference prevention functionality only where needed, minimizing the increase in device complexity
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 design significantly reduces the influence of high-frequency radiation interference on the capacitive touch panel, converting potential moving points to static points and improving the stability of the touch system by ensuring that high-frequency signals are grounded, thereby preventing false actions and enhancing system reliability.
Implementation Method 1
the capacitance value of the second capacitor C5 formed between the metal component and the metal plating layer is at least 10 times the capacitance value of the first capacitor C4 formed between the metal plating layer and the capacitive touch panel
Implementation Method 2
the high-frequency transformer in the high-frequency switching power supply will generate a high-frequency radiation signal during operation, which will form a coupling capacitor C4 between the metal coating layer and the touch panel
Implementation Method 3
a safety capacitor Y1 is connected to the ground terminal of the controller, and the metal component is connected to the ground terminal through the safety capacitor Y1; the capacitance of the safety capacitor Y1 is at least 10 times the capacitance of the second capacitor C5
Data Source
AI summary
The invention relates to a mirror cabinet capable of preventing mirror capacitive touch button from touch misoperation, the mirror cabinet comprises a mirror surface, which comprises a glass layer, a metal plating layer provided on the back of the glass layer, and an uncoated metal layer area is provided on the back of the glass layer, and a capacitive touch panel including a plurality of touch buttons is provided in the uncoated metal layer area; a back of the mirror is also provided with a controller electrically connected to the capacitive touch panel and a high-frequency switching power supply electrically connected to the controller. The mirror cabinet can prevent touch misoperation of the mirror surface capacitive touch button so as to enable a touch system to have good stability.