Position Indicator Intermittent Signal Transmission
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Solution Overview
Problem
Existing position detectors face reduced transfer speed due to the need to transmit multiple types of information, including specific ID and pen pressure, which increases power consumption and is affected by noise from display devices.
Innovation Solution
A position detector with a power source in the position indicator that intermittently transmits signals, allowing the tablet to select and acquire necessary information using control signals synchronized with the position indicator's timing, reducing power consumption and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple types of information are transmitted from the position indicator to the tablet, then the information completeness is improved, but the transfer speed is reduced
Solution Approach 1:
The patent extracts and transmits only the necessary information from the position indicator to the tablet, rather than transmitting all available information. This selective transmission approach maintains information completeness for required data while improving transfer speed by reducing the total data volume.
Solution Approach 2:
The information transmission is segmented into different types (position information, pen pressure information, etc.), allowing the system to selectively transmit only the necessary segments based on current needs, thereby balancing information completeness with transfer efficiency.
2Reliability
If a power source is provided in the position indicator to transmit signals, then the signal strength is improved, but the power consumption increases
Solution Approach 1:
The position indicator uses intermittent signal transmission instead of continuous transmission. The indicator transmits signals at specific intervals or when triggered by tablet inquiries, maintaining sufficient signal strength for reliable detection while significantly reducing overall power consumption compared to continuous transmission.
3Adaptability or versatility
If the sensor tablet is disposed on the front surface of a large display device, then the design flexibility is improved, but the noise interference increases
Solution Approach 1:
The patent uses an electromagnetic field as an intermediary for position detection, where the tablet generates electromagnetic fields that interact with the position indicator. This approach allows the sensor tablet to be disposed on the front surface of large display devices with improved design flexibility, while the electromagnetic field-based detection method maintains reliability by being less susceptible to noise interference compared to direct electrical connections.
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 enables reliable and efficient transmission of selected information, reducing power consumption and maintaining high transfer speed even with large display devices, while minimizing the need for frequent battery exchange or charging.
Implementation Method 1
a power source provided in a position indicator needs not be exchanged or charged frequently
Implementation Method 2
A position detector called a pen tablet has been developed as one of pointing devices used for photograph processing, illustration creation, or the like, on a computer apparatus
Data Source
AI summary
A position indicator is provided, which includes a pressure sensor configured to detect a pressure applied to a tip of the position indicator. The position indicator further includes a storage configured to store the pressure as one type of digital data and to store at least one other type of digital data. The position indicator also includes a receiver configured to receive a command signal transmitted from a position sensor, and a control circuit configured to select one or more types of digital data in the storage based on the command signal. The position indicator includes a transmitter configured to transmit the selected one or more types of digital data to the position sensor.