Position Pointer Power Control via Resonant Signal Detection
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Solution Overview
Problem
Position detecting apparatuses for computers and CAD systems face inefficiencies in power management, as they require high-power electromagnetic waves from tablets to operate, leading to battery drain in portable devices and unnecessary power consumption.
Innovation Solution
A position detecting apparatus and position pointer system where the position pointer's power is controlled by a control signal from the tablet, turning on only when within a specific range, using a battery-powered position pointer with a resonant circuit and power control means to manage power based on signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the tablet transmits electromagnetic waves with sufficiently large power to enable the position pointer to acquire enough electric power, then the position pointer can operate without a battery, but the life of the battery in portable personal computers is reduced
Solution Approach 1:
The position pointer is equipped with a battery and power control means that enable it to self-manage its power supply. The pointer can autonomously control when to activate its electromagnetic wave transmission based on detection of control signals from the tablet, thereby serving its own power needs without draining the tablet's battery excessively.
Solution Approach 2:
The system changes the operational state of the position pointer by controlling power supply parameters. The power control means switches the pointer between active and inactive states based on whether control signals are detected, thereby optimizing power consumption according to actual usage conditions.
2Use of energy by stationary object
If a battery is disposed in the position pointer to reduce electric power consumed by the tablet, then the tablet can transmit lower power electromagnetic waves, but manual operation to turn on/off the power switch becomes troublesome for users
Solution Approach 1:
The power control means in the position pointer automatically manages power activation without requiring manual user intervention. When the pointer detects control signals from the tablet indicating it is within usable range, the power control means automatically turns on power, eliminating the need for users to manually switch the power on/off.
Solution Approach 2:
The system uses feedback from control signals transmitted by the tablet to the position pointer. The pointer detects these signals and uses them to determine when to activate power, creating an automatic feedback loop that responds to the spatial relationship between the tablet and pointer without requiring manual user input.
3Ease of operation
If the position pointer operates continuously with a long automatic off period to allow convenient usage, then user convenience is maintained, but electric power of the battery is wasted
Solution Approach 1:
The power control means dynamically changes the operational state of the position pointer based on detected control signals. Instead of using a fixed long timeout period, the system responds in real-time to signals from the tablet, activating power only when the pointer is within usable range and deactivating it when out of range, thereby optimizing battery usage while maintaining convenience.
Solution Approach 2:
The system uses periodic transmission of control signals from the tablet to the position pointer. The power control means monitors for these periodic signals and activates power only during periods when signals are detected, replacing continuous operation with periodic, demand-based activation that reduces battery waste while maintaining usability.
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 minimizes battery power consumption by ensuring the position pointer is only active when in use, reducing unnecessary power drain and allowing for lower power transmission from the tablet, thus extending battery life and reducing overall power usage.
Implementation Method 1
the electric power with which the position pointer operates is obtained by rectifying a signal induced by the electromagnetic wave transmitted from the tablet
Implementation Method 2
a position detecting apparatus in which a signal is transmitted and received by means of electromagnetic coupling or electrostatic coupling between a position pointer and a tablet
Implementation Method 3
a battery and an oscillator in a position pointer whereby a high-frequency signal generated by the oscillator is radiated in the form of an electromagnetic wave from the position pointer
Data Source
AI summary
In a position detecting apparatus, electric power of a position pointer is turned on only when the position pointer is put within a particular range from a tablet to minimize consumption of a battery disposed in the position pointer. When the position pointer is brought close to the tablet, a control signal transmitted from the tablet is detected by a resonant circuit of the position pointer, and MOSFETs serving as a power switch are turned on by the detected signal. In response, electric power is supplied from a battery via the MOSFETs to circuit elements of the position pointer, and thus an operation of the position pointer starts.