Optical Switch Module Control for Detection Speed and Power
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Solution Overview
Problem
Conventional optical switch keyboards suffer from slow detection and high power consumption due to the prolonged activation of the light-emitting diode, which results in slow detection speed and increased energy usage.
Innovation Solution
The optical switch module incorporates a light generation circuit, a light receiving circuit, and a control unit that configures the signal reading end in an output mode to quickly pull up the potential of the light receiving unit, allowing for faster stabilization and reducing the activation time of the light generation unit, thereby enhancing detection speed and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light-emitting diode is activated continuously to ensure the infrared optical sensor reaches steady state, then the detection accuracy is improved, but the power consumption increases and detection speed decreases
Solution Approach 1:
The patent implements periodic action by activating the light-emitting diode in pulses rather than continuously. The control circuit activates the light-emitting diode only during specific time intervals (when the infrared optical sensor needs to reach steady state), and keeps it off during other intervals. This periodic activation pattern reduces overall power consumption while still ensuring the sensor reaches the necessary steady state for accurate detection at the required moments.
2Measurement precision
If the light-emitting diode is activated continuously to ensure the infrared optical sensor reaches steady state, then the detection accuracy is improved, but the detection speed decreases
Solution Approach 1:
The control circuit uses periodic activation of the light-emitting diode to resolve the speed-accuracy trade-off. By activating the light-emitting diode in synchronized pulses that coincide with when the infrared optical sensor needs to reach steady state, the system achieves accurate detection without the continuous activation delay. The periodic timing allows the system to optimize both the steady-state achievement time and the overall detection speed.
3Stability of the object's composition
If the light-emitting diode is activated continuously to ensure the infrared optical sensor reaches steady state, then the signal stability is improved, but the activation time increases
Solution Approach 1:
The control circuit implements periodic activation of the light-emitting diode, activating it only during intervals when the infrared optical sensor requires steady state for signal stability. By timing the activation pulses to coincide with these specific intervals and keeping the light-emitting diode off during other intervals, the system achieves the necessary signal stability without the continuous activation time penalty, thus reducing overall activation time while maintaining signal quality.
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 configuration significantly shortens the preparation time of the light receiving unit, increases the overall detection speed of the input device, and decreases energy consumption by optimizing the operation of the light generation unit.
Implementation Method 1
a light-emitting diode and an infrared optical sensor replace a metallic elastic piece in the structure of a conventional mechanical switch
Implementation Method 2
The two ways that an open circuit and a closed circuit, are formed by applying the light sensing principle to trigger a key signal
Data Source
AI summary
An optical switch module including a light generation circuit, a light receiving circuit, and a control unit is provided. The light generation circuit includes a light generation unit and a control end, and generates light according to a control signal from the control end. The light receiving circuit includes a light receiving unit and a signal reading end, and is configured to receive light to generate a detection signal at the signal reading end. The control unit is configured to generate the control signal and receive the detection signal. The control unit further selectively configures the signal reading end in an input mode or an output mode. Before the control unit configures the signal reading end in the input mode to read the detection signal, the control unit configures the signal reading end in the output mode to pull up a potential of the light receiving unit.