Position Indicator Signaling for High-Rate Position Sampling
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Solution Overview
Problem
Existing position detecting systems face a trade-off between the sampling rate of position information and the amount of information transmitted from the position indicator, as increased information size reduces the frequency of continuous signal transmission, making it difficult to track rapid movements.
Innovation Solution
A position indicator transmits multiple signal blocks, each containing a continuous signal for position detection and a modulated signal for information, allowing large-size information transmission without reducing the sampling rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the position indicator transmits large-size information (e.g., 60-bit ID with check bits), then the information transmission capacity is improved, but the sampling rate of position information decreases because transmission time increases
Solution Approach 1:
The patent segments the large-size information (e.g., 60-bit ID) into multiple smaller blocks (e.g., six 10-bit blocks). Each block is transmitted separately with its own continuous signal, allowing position detection to occur multiple times during the transmission process. This segmentation enables the system to maintain high sampling rates while transmitting large amounts of information, as position detection can proceed in parallel with information transmission across different blocks.
2Loss of information
If the position indicator transmits diverse items of information (writing pressure, on-off information, identifier), then the information content is improved, but the transmission time increases reducing the frequency of continuous signal transmission
Solution Approach 1:
The patent segments diverse information items into multiple blocks, where each block contains a subset of the total information (e.g., portions of the ID, writing pressure data, or switch states). This allows the position indicator to transmit comprehensive information while maintaining frequent transmission intervals, as each segmented block can be sent independently and relatively quickly.
Solution Approach 2:
The patent employs periodic transmission of segmented information blocks, where each block is transmitted at regular intervals with continuous signals. This periodic action ensures that position detection occurs frequently while still delivering all required information over time, balancing information completeness with transmission efficiency.
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 enables the transmission of large-size information from the position indicator without compromising the sampling rate, ensuring accurate and rapid detection of position and status information.
Implementation Method 1
The electromagnetic induction system is a system in which the position detecting device uses the linear conductors as a transmission antenna to transmit electromagnetic waves to the position indicator which in turn transmits a signal for detection by the position detecting device using the linear conductors as a receiving antenna.
Implementation Method 2
The position detecting device is configured to detect the position of the position indicator on the basis of voltages or their variations generated by the linear conductors being approached by the position indicator.
Data Source
AI summary
A signal transmission method is provided, which may be implemented by a position indicator. The signal transmission method includes a step of dividing first information, which is represented in a digital signal of a first defined number of bits, into a plurality of information parts respectively represented in digital signals of a second defined number of bits smaller than the first defined number of bits. The signal transmission method includes a step of transmitting, from the position indicator to a position detecting device, the information parts, and distinguishing information usable for distinguishing the information parts from each other, wherein each of the information parts is transmitted with second information different from the first information.