Light Pen Battery Conservation via Dynamic Light Emission Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image projection systems with pointing elements, such as electronic pens, face battery depletion issues when low battery capacity is detected, leading to potential device failure if battery replacement is not immediate.
Innovation Solution
A pointing element with a battery, a light emitting unit, a remaining battery capacity detection unit, and a control unit that adjusts light emission form by reducing light emission time, frequency, or intensity when the battery capacity falls below a threshold, along with a reporting unit to notify the user and projector of these changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light emitting unit continues to emit light at normal intensity after low battery capacity is detected, then the pointing element can maintain normal functionality, but the battery depletes faster and may prevent the device from functioning
Solution Approach 1:
The light emission form is changed dynamically based on battery capacity status. When battery capacity is normal, the light emitting unit operates at full intensity. When battery capacity drops to or below the threshold, the control unit automatically changes the light emission form to reduce light emission, thereby adapting the system operation to current energy availability and preventing complete battery depletion
Solution Approach 2:
The control unit changes physical parameters of light emission (intensity, duration, or frequency) based on detected battery capacity. By adjusting these parameters when battery capacity is low, the system reduces power consumption while maintaining basic functionality until battery replacement
2Duration of action of moving object
If the light emitting unit reduces light emission to conserve battery power, then battery depletion is restrained, but the amount of light emitted decreases
Solution Approach 1:
The light emitting unit performs partial light emission action when battery capacity is low. Instead of maintaining full light emission, the control unit reduces light emission to the minimum necessary level to maintain basic pointing functionality, thereby extending battery life while still providing usable operation
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 extends the usage time of the pointing element by conserving battery power through controlled light emission adjustments, preventing premature battery depletion and ensuring continued functionality until replacement.
Implementation Method 1
a light emitting unit that intermittently emits light using electric power supplied from the battery
Data Source
AI summary
A light pen which performs pointing on an image projected from a projector includes: a battery; a light emitting unit which intermittently emits light with electric power supplied from the battery; a remaining battery capacity detection unit which detects a remaining capacity of the battery; and a control unit which changes a light emission mode of the light emitting unit in such a way as to reduce an amount of light emitted from the light emitting unit, if the remaining capacity of the battery detected by the remaining battery capacity detection unit is equal to or lower than a predetermined threshold.