Position Indicator Signal Blocks for High-Rate Position Detection
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Solution Overview
Problem
Existing position detection 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 signal blocks successively, each containing a continuous signal for position detection and a modulated signal for divided information parts, 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 divides the 60-bit information into multiple signal blocks, each containing a continuous signal for position detection and a modulated signal for information transmission. By segmenting the information transmission across multiple blocks, the system maintains continuous position detection capability while transmitting large amounts of data, thus resolving the contradiction between information size and sampling rate.
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 merges the continuous signal for position detection with modulated signals carrying diverse information items (writing pressure, on-off information, identifier) into unified signal blocks. This combining approach allows simultaneous transmission of position information and diverse data items without increasing total transmission time, thereby resolving the contradiction between information content and transmission time.
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 timely detection of position and additional information, such as ID and status, even during rapid movements.
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
Implementation Method 3
The capacitance system involves using capacitance generated between the position indicator and linear conductors
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.