Position Input Device Using Electrical Double-Layer Capacitor
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Solution Overview
Problem
Position input systems with built-in batteries face issues such as increased weight, frequent battery replacement, and power consumption challenges, especially when multiple oscillation units are used, leading to inconvenient operational disruptions and reduced accuracy due to noise interference from liquid crystal display devices.
Innovation Solution
A position input system utilizing an electrical double-layer capacitor with a charging circuit and an external power supply unit, allowing for reliable signal transmission with low power consumption and reduced noise interference, eliminating the need for battery replacement, and enabling lightweight and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a battery is incorporated into the position indicator to enable strong signal transmission with low power consumption, then signal strength and power efficiency are improved, but the device weight increases significantly and operating properties are degraded
Solution Approach 1:
The patent extracts the power source function from a traditional battery and implements it using an electrical double-layer capacitor instead. This capacitor can be charged externally through a charging terminal, eliminating the need for a built-in battery while maintaining the ability to transmit strong signals with low power consumption during operation.
Solution Approach 2:
The patent introduces an external charging device as an intermediary to supply power to the position indicator. The charging terminal on the position indicator connects to this external device, which acts as a mediator to transfer electrical energy without requiring the position indicator to carry its own heavy battery.
2Measurement precision
If the intensity of signals transmitted from the position indicator is increased to improve detection accuracy, then measurement precision is improved, but power consumption is increased causing frequent battery depletion
Solution Approach 1:
The patent implements periodic charging cycles where the position indicator is charged externally during non-use periods or between uses. This allows the device to maintain high signal transmission power for accurate position detection without suffering from continuous battery depletion, as the capacitor is replenished periodically from an external power source.
3Ease of operation
If batteries are built into the position indicator to enable autonomous operation, then operational independence is improved, but battery replacement becomes time-consuming and troublesome
Solution Approach 1:
The patent enables the position indicator to serve itself by providing a charging terminal that allows the device to recharge its electrical double-layer capacitor autonomously when connected to an external power source. This eliminates the need for users to manually replace batteries, as the device can be quickly recharged in place without disassembly or component replacement.
4Adaptability or versatility
If multiple oscillation units are provided in the position pointing device to transmit different information, then functionality is improved, but power consumption is increased leading to frequent battery replacement
Solution Approach 1:
The patent merges the power supply function for multiple oscillation units into a single electrical double-layer capacitor system. Instead of having separate power sources for each oscillation unit, all units share the common capacitor, which is charged once from an external source. This reduces overall power consumption management complexity and eliminates the need for multiple batteries while maintaining the ability to operate multiple oscillation units simultaneously for enhanced functionality.
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
The system achieves stable position detection with low power consumption, reduces operational disruptions, and provides excellent operability by eliminating the need for battery replacement and allowing for rapid charging, while maintaining high accuracy and sensitivity.
Implementation Method 1
A position input system utilizing an electrical double-layer capacitor with a charging circuit and an external power supply unit
Implementation Method 2
A position input system utilizing an electrical double-layer capacitor with a charging circuit and an external power supply unit, allowing for reliable signal transmission with low power consumption
Data Source
AI summary
A position input device is provided in which signals are transmitted from a position indicator, and signals transmitted from the position indicator are received by a position detector device. According to certain embodiments, an electrical double-layer capacitor, a charging circuit which charges the electrical double-layer capacitor, and a power transmission unit which relays and supplies to the charging circuit power supplied from a power supply unit external to the position indicator, are provided in the position indicator. In other embodiments the position input device has a built-in power supply unit, transmitting units, and a control unit for switching the transmitting units between energized and de-energized states. Also provided are position input systems and computer systems including the position input device, and methods of operating the position input device and the systems.