Optical Pointing System Dynamic Power and Clock Control
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Solution Overview
Problem
Conventional optical pointing systems experience increased power consumption as operating speed increases, due to fixed power and clock signal supply, leading to inefficient energy use.
Innovation Solution
An optical pointing system with a movement speed sensing unit that adjusts power and clock signal frequency based on movement speed, utilizing a variable power unit and a variable clock signal generating unit to dynamically adjust power and clock signal magnitude and frequency accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If fixed power and clock signal are supplied at maximum levels to ensure fast operation, then operating speed is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning from fixed power and clock signal supply to dynamic adjustment based on movement speed. The control unit varies the clock signal frequency and power levels according to the detected movement speed, making the system adaptable rather than static. This resolves the contradiction by allowing fast operation only when necessary (high movement speed) while reducing power consumption during low-activity periods.
Solution Approach 2:
The patent changes key parameters (clock signal frequency and power levels) based on movement speed detection. By adjusting these parameters dynamically - increasing clock frequency and power when movement speed is high, and decreasing them when movement speed is low - the system optimizes the trade-off between operating speed and power consumption, directly addressing the technical contradiction.
2Reliability
If fixed power is supplied at maximum magnitude to maintain circuit operation at all speeds, then reliability is improved, but energy efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts power magnitude based on movement speed requirements. The control unit determines appropriate power levels corresponding to different movement speed ranges, ensuring sufficient power for reliable operation when needed while minimizing energy waste during low-activity periods. This dynamic approach maintains reliability without the penalty of constant maximum power supply.
Solution Approach 2:
The patent applies partial action by supplying only the necessary power level for the current operation requirements rather than always providing maximum power. When movement speed is low, reduced power suffices for reliable operation, and when movement speed is high, power is increased to the appropriate level. This avoids excessive power consumption while maintaining circuit reliability throughout.
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 approach reduces power consumption by matching power and clock signal levels with movement speed, optimizing energy use and reducing unnecessary power expenditure.
Implementation Method 1
the light 4 passing through the lens 5 is inputted into the image sensor 3 which is located in the movement sensing unit (not shown) and is included in a CMOS (Complementary Metal Oxide Semiconductor) device. An image of the worktable surface 2 is continuously sensed by the image sensor 3
Data Source
AI summary
Disclosed are an optical pointing system and method for controlling power and/or clock signal thereof. The optical pointing system includes a movement speed sensing unit for calculating a movement speed using a movement value, a variable power unit for varying a magnitude of power supply voltage according to the calculated movement speed, and a variable clock signal generating unit for adaptively varying an operating speed of a circuit by varying a frequency of a supplied clock signal according to the calculated movement speed. Thus, it is possible to reduce power consumption by adaptively varying the operating speed of the circuit based on the magnitude of the supplied power and/or the frequency of the clock signal according to the movement speed.