Position Indicator Load Resistance Control for Signal Speed and Energy Loss Trade-off
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Solution Overview
Problem
Existing position indicators face a challenge in simultaneously reducing energy loss and increasing signal transmission speed, as these two demands are generally incompatible due to the characteristics of resonant circuits.
Innovation Solution
A position indicator with a load resistance value control circuit that adjusts the load resistance of the resonant circuit based on the duration of received electromagnetic waves, setting a larger resistance for longer durations to minimize energy loss and a smaller resistance for shorter durations to enhance transmission speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the load resistance of the resonant circuit is reduced to increase signal transmission speed, then the information transmission rate increases, but the energy loss increases
Solution Approach 1:
The patent applies dynamics by making the load resistance value changeable rather than fixed. The load resistance is dynamically adjusted based on the duration of received electromagnetic waves: set to a first value for longer durations and a second value for shorter durations. This dynamic adjustment allows the system to optimize between energy efficiency and transmission speed depending on operating conditions.
Solution Approach 2:
The patent changes the parameter of load resistance based on the duration of received electromagnetic waves. By detecting the duration and selectively setting the load resistance to different values, the system adapts its electrical parameters to balance energy loss and transmission speed requirements for different signal conditions.
2Loss of energy
If the load resistance of the resonant circuit is increased to reduce energy loss, then the power receiving efficiency improves, but the signal transmission speed decreases
Solution Approach 1:
The load resistance is dynamically adjusted based on the duration of received electromagnetic waves. For longer durations, a higher resistance value is set to minimize energy loss and improve power receiving efficiency. For shorter durations, a lower resistance value is set to prioritize transmission speed, thus dynamically balancing the trade-off between efficiency and speed.
Solution Approach 2:
The patent changes the load resistance parameter according to the duration of received electromagnetic waves. This parameter change strategy allows the system to optimize power receiving efficiency when signals are received for longer periods while maintaining acceptable transmission speed for shorter signals.
3Device complexity
If a fixed load resistance is used in the resonant circuit, then the device complexity is reduced, but the system cannot simultaneously optimize energy loss and transmission speed
Solution Approach 1:
The patent introduces a dynamic load resistance control mechanism that adjusts resistance based on signal duration. This adds complexity to the device but enables simultaneous optimization of energy loss and transmission speed by adapting to different operating conditions, proving that controlled complexity can resolve performance trade-offs.
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 improves power receiving efficiency during longer wave receptions and increases information transmission rate per unit time, effectively addressing the incompatibility between energy loss and transmission speed.
Implementation Method 1
a position indicator which receives electromagnetic waves transmitted from a position detection device and returns the electromagnetic waves to the position detection device
Implementation Method 2
a position indicator of an electromagnetic induction type which is used in conjunction with a position detection device that detects a position indicated by the position indicator using electromagnetic inductive coupling
Data Source
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AI summary
A position indicator includes a resonant circuit (11) configured to receive electromagnetic waves transmitted intermittently from a position detection device (21) with a first duration (T1) and a second duration (T2). The second duration is shorter than the first duration. The position indicator also includes a load resistance value control circuit (40) configured to control a load resistance (13) of the resonant circuit such that different values of the load resistance are set for the first duration and the second duration. A value of the load resistance set for the second duration is smaller than a value of the load resistance set for the first duration.