Operation Device Light Emission Mode Switching for Power Reduction
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Solution Overview
Problem
Existing operation devices used to operate an operation surface consume a large amount of electric power due to continuous light emission for signal transmission, which reduces their lifespan.
Innovation Solution
Implementing a controller that adjusts the light emission mode of the operation device, emitting light in a first mode when not in contact with the surface and a second mode with reduced light emission when in contact, along with adjusting current supply and considering optical characteristics of the surface, to minimize power consumption while maintaining detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light emitter continuously emits light in the first light emission mode to ensure reliable operation detection, then the operation detection accuracy is maintained, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the light emission characteristics changeable based on operational state. The controller dynamically switches between first light emission mode (when not in contact) and second light emission mode (when in contact), optimizing the balance between detection accuracy and power consumption for each state.
Solution Approach 2:
The patent implements periodic action by having the light emitter emit light in periodic intervals rather than continuously. The controller causes the light emitter to periodically emit light in either the first or second light emission mode, reducing overall power consumption while maintaining detection capability through timed emission cycles.
2Use of energy by moving object
If the light emitter emits light in the second light emission mode with reduced light amount to reduce power consumption, then the power consumption decreases, but the operation detection accuracy may be compromised
Solution Approach 1:
The patent applies local quality by providing different light emission characteristics for different operational states. The first light emission mode provides higher light intensity for reliable detection when hovering, while the second light emission mode provides reduced intensity for power saving during contact operation, with each mode optimized for its specific operational context.
Solution Approach 2:
The patent implements feedback by using a detector to detect contact state and providing this information to the controller, which then adjusts the light emission mode accordingly. This closed-loop feedback ensures that the light emission is optimized for the current operational state, maintaining detection accuracy while minimizing power consumption.
3Reliability
If the light emission time period is extended to improve detection reliability, then the operation detection reliability is enhanced, but the power consumption increases
Solution Approach 1:
The patent applies partial action by emitting light only for the minimum necessary time periods required for detection in each state. The light emission time periods in both first and second light emission modes are optimized to be just sufficient for reliable detection, avoiding excessive emission that would increase power consumption without adding detection reliability.
4Measurement precision
If the current supplied to the light emitter is increased to improve light intensity for better detection, then the operation detection accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent applies parameter changes by adjusting the current supplied to the light emitter based on operational state. The controller controls the adjuster to supply different current levels: higher current in the first light emission mode for adequate detection when hovering, and lower current in the second light emission mode for power saving during contact, optimizing the balance between light intensity and power consumption.
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 optimizing light emission periods and intensity based on contact status and surface characteristics, thereby extending the device's lifespan without compromising detection accuracy.
Implementation Method 1
a light emitter and a controller that causes the light emitter to emit light for signal light transmission
Data Source
AI summary
A pointing element used to operate a screen includes a front end light emitter and a controller that causes the front end light emitter to emit light for signal light transmission, and the controller causes the front end light emitter to emit light in a first light emission mode in a state in which the pointing element is not in contact with the screen and causes the front end light emitter to emit light in a second light emission mode in which the amount of light emitted from the front end light emitter is smaller than in the first light emission mode in a state in which the pointing element is in contact with the screen.