Removable Pushbutton Interface for Stable Touch Panel Detection
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Solution Overview
Problem
Existing inputting devices for touch sensors, which use a conductive member with a pushbutton, suffer from false detection and restricted placement due to unstable potential and limited movement, leading to inaccurate input detection and positional constraints.
Innovation Solution
An inputting device with a conductive member connected to a ground terminal via a current path and a switch, allowing the touch sensor to detect changes in capacitance when the switch is activated, enabling accurate detection and flexible placement by converting physical button presses into electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the conductive member is electrically isolated from the touch sensor, then the pushbutton structure can be simplified, but the potential of the conductive member becomes unstable causing false detection
Solution Approach 1:
The patent introduces a switch as an intermediary component between the conductive member and the touch sensor. The switch controls the electrical connection state, allowing the conductive member to be connected or disconnected from the touch sensor based on pushbutton operation. This intermediary mechanism resolves the contradiction by enabling stable potential when connected while maintaining structural simplicity through controlled isolation when disconnected.
Solution Approach 2:
The patent implements dynamic electrical connection by using a switch that can change the connection state between the conductive member and touch sensor. The connection state transitions from isolated to connected based on pushbutton depression, allowing the system to adapt between stability (when connected) and simplicity (when isolated), thus resolving the contradiction through dynamic state change.
2Ease of operation
If the conductive member is restricted in movement for interlocking with the pushbutton, then the pushbutton operation is mechanically linked, but the amount of movement is limited reducing detection accuracy
Solution Approach 1:
The patent replaces the mechanical interlocking movement system with an electrical switching system. Instead of relying on the conductive member's physical movement distance for detection, the system uses the switch to convert pushbutton operation into an electrical connection state change. This substitution maintains ease of operation while improving detection precision by using electrical state change rather than mechanical displacement.
3Measurement precision
If the pushbutton is disposed just above the touch sensor, then the conductive member can be positioned for detection, but the disposition position is restricted limiting design flexibility
Solution Approach 1:
The switch acts as an intermediary that decouples the spatial positioning requirement from the detection function. By introducing the switch mechanism, the conductive member can be positioned at various locations without compromising detection capability, as the electrical connection state change rather than precise positioning enables detection. This resolves the contradiction between detection precision and position flexibility.
4Ease of operation
If the conductive member's distance to the touch sensor is physically changed for input, then information can be inputted, but false detection is likely to occur and position selection is restricted
Solution Approach 1:
The patent replaces the mechanical distance-change-based input method with an electrical switching-based input method. Instead of relying on physical movement of the conductive member to change distance and trigger detection, the system uses a switch to create a clear electrical connection state change. This substitution maintains ease of operation for information input while significantly improving reliability by eliminating false detection associated with mechanical movement.
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 solution reduces false detection and allows for flexible placement of the inputting device relative to the touch sensor, improving detection accuracy and usability by stabilizing the conductive member's potential and converting physical button presses into reliable electrical signals.
Implementation Method 1
a conductive member 14 disposed on a capacitance type touch sensor 102 and cooperating with the touch sensor to form a capacitor therebetween
Data Source
AI summary
An inputting device for inputting information to a touch sensor is disclosed which is less likely to cause false detection and allows comparatively free selection of a disposition position of the inputting device relative to a touch sensor. The inputting device includes a conductive member disposed on a touch sensor of the capacitance type and cooperating with the touch sensor to form a capacitor therebetween, a ground terminal connected to the ground of the touch sensor, a current path interconnecting the conductive member and the ground terminal, and a switch disposed on the current path. A result of detection by the touch sensor varies in response to switching of the switch.