Optical Mouse Sleep Mode Wake-Up via Signal Intensity Analysis
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Solution Overview
Problem
Conventional optical touch mice experience delayed detection of user motion due to low-frequency signals during idle periods, leading to ineffective control commands and inconvenient operation.
Innovation Solution
A navigation apparatus with an optical touch unit and a touch processing unit that outputs an optical detecting signal, analyzes the intensity of the reflecting signal to determine the object's position, and switches to a normal mode upon detection, allowing immediate actuation of the touch processing unit and coordinate detecting unit, even before actual contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the optical detector outputs low-frequency detecting signal during idle period for energy conservation, then energy consumption is reduced, but detection speed and responsiveness deteriorate
Solution Approach 1:
The patent applies dynamics by making the sampling frequency adjustable rather than fixed. The optical detector dynamically changes its operating state between low-frequency (sleep mode) and high-frequency (normal mode) based on real-time detection needs. When motion is detected, the system transitions from energy-saving low-frequency sampling to responsive high-frequency sampling, resolving the contradiction between energy consumption and detection speed.
Solution Approach 2:
The patent changes the parameter of sampling frequency based on operational conditions. During idle periods, the system uses low-frequency sampling to conserve energy. When motion is detected through image variation analysis, the system switches to high-frequency sampling to ensure immediate and accurate detection, thus adapting the frequency parameter to different operational states.
2Loss of time
If the optical detector increases sampling frequency to detect user motion instantly, then detection responsiveness improves, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by using intermittent high-frequency sampling triggered by motion detection events. Instead of continuous high-frequency sampling that would consume excessive energy, the system periodically switches to high-frequency mode only when motion is detected, maintaining responsiveness while minimizing energy consumption during idle periods.
Solution Approach 2:
The system performs preliminary action by continuously monitoring for motion at low frequency and preparing to switch to high-frequency mode in advance. When motion is detected, the system is already prepared to increase sampling frequency immediately, eliminating detection delay without requiring continuous high-frequency operation.
3Loss of energy
If the optical touch mouse remains in sleep mode during idle period, then energy conservation is achieved, but operational responsiveness deteriorates
Solution Approach 1:
The patent uses feedback by continuously analyzing captured images for variations that indicate motion. This feedback mechanism allows the system to detect when the user intends to interact with the device and automatically wake from sleep mode, ensuring operational convenience is maintained without requiring continuous high-power operation.
Solution Approach 2:
The system dynamically transitions between sleep mode and normal operating mode based on detected motion. This dynamic state change allows the mouse to conserve energy during idle periods while quickly becoming responsive when needed, balancing energy conservation with operational convenience.
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
Enables immediate detection of user motion and generation of effective control commands, enhancing operational convenience by awakening the touch processing function from sleep mode without delay, with advantages of simple design, low manufacturing cost, and easy assembly.
Implementation Method 1
receiving an optical reflecting signal from the object
Data Source
AI summary
A method capable of detecting position of an object for actuating a navigation apparatus is disclosed in the present invention. The navigation apparatus includes a casing, an optical touch unit and a touch processing unit. The optical touch unit is disposed on an upper surface of the casing. The touch processing unit is disposed inside the casing and electrically connected to the optical touch unit. The actuating method includes outputting an optical detecting signal, receiving an optical reflecting signal from the object, analyzing the optical reflecting signal to obtain intensity of the optical reflecting signal, determining whether the object is located above the optical touch unit according to the intensity, and switching the touch processing unit into a normal mode when the object is located above the optical touch unit.