Input Device Diode Circuit for False Click Prevention
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Solution Overview
Problem
Input devices like mice can experience errors due to static electricity causing false clicks, where the static electricity on a user's finger can trigger the switch or lead to false detection of clicks even when the switch is not actually triggered.
Innovation Solution
The integration of a first diode and a second diode connected in series between the switch and the controller, which guides static electricity to grounding potentials, preventing false click detection by ignoring noise intervals between switch levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a switch is used to detect click actions in an input device, then the device can respond to user input, but static electricity on the user's finger can cause false click detections or multi-click errors
Solution Approach 1:
A diode is introduced as an intermediary component between the switch and the circuit board. The diode's anode is connected to one terminal of the switch and its cathode is connected to the other terminal. This intermediary structure allows the diode to conduct static electricity away from the circuit board when the switch is activated, preventing false click detections while still allowing legitimate click signals to pass through to the controller.
Solution Approach 2:
The patent converts the harmful effect of static electricity into a beneficial outcome by providing a controlled discharge path through the diode. When static electricity accumulates on the user's finger and contacts the switch, the diode conducts this static charge to ground, preventing it from damaging the circuit board or causing false detections. The harmful static electricity is thus transformed into a safe discharge mechanism that protects the system.
2Device complexity
If the circuit board directly connects the switch to the controller, then signal transmission is simple, but noise between switch activation levels causes false click detection
Solution Approach 1:
The diode serves as an intermediary filtering element in the signal path between the switch and the controller. It allows legitimate switch activation signals to pass through to the controller while blocking or filtering out noise signals that do not meet the diode's conduction criteria. This intermediary structure improves signal detection accuracy without significantly complicating the overall circuit design.
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 effectively reduces false click detection by directing static electricity away from the circuit, thereby enhancing the accuracy and reliability of input device operations.
Implementation Method 1
the first diode, the second diode, the switch and the controller are disposed on the circuit board
Implementation Method 2
the static electricity on the finger may invade a circuit board through the switch
Data Source
AI summary
An input device, a mouse using the same and a method using the same are provided. The input device capable of avoiding error action of a switch includes a first g diode, a second diode and a switch. The second diode is electrically connected to the first diode. The switch is electrically connected to between the first diode and the second diode.