Active Pen Data Channel Segmentation for Transmission Flexibility
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Solution Overview
Problem
Existing active pens lack flexibility in data transmission, as they use a single data channel for all types of downlink information, limiting transmission performance and efficiency.
Innovation Solution
The active pen employs a classification system using multiple data channels and control circuits to differentiate between high-data, low-frequency (first-type) and low-data, high-frequency (second-type) downlink information, allowing for flexible transmission modes such as time division, frequency division, or orthogonal coding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single data channel is used to transmit all downlink information, then the device complexity is reduced, but the transmission performance and flexibility are limited
Solution Approach 1:
The patent segments downlink information into two distinct types: first-type downlink information (pen pressure information and battery state information) and second-type downlink information (button press state information, hover state information, and ink state information). This segmentation allows each type to be transmitted through optimized channels or methods, resolving the contradiction between simple structure and flexible transmission by organizing complexity in a manageable way.
2Ease of operation
If a single data channel is used for all information, then the system is simpler to operate, but transmission efficiency and data integrity are compromised
Solution Approach 1:
By dividing downlink information into first-type and second-type categories with different transmission characteristics, the system can optimize transmission efficiency for each type while maintaining simple operational control through unified channel management. The controller automatically manages the segmentation without requiring complex user intervention.
3Device complexity
If all downlink information is transmitted at the same rate, then the transmission system is simpler, but real-time performance for different data types is compromised
Solution Approach 1:
The patent segments downlink information transmission into different rates based on type: first-type information (pen pressure, battery state) is transmitted at a first rate optimized for real-time accuracy, while second-type information (button state, hover state, ink state) is transmitted at a second rate. This segmentation enables each data type to achieve its optimal real-time performance without complicating the overall transmission control system.
Data Source
AI summary
An active pen is provided. The active pen includes a first transceiver and a first control circuit. The first transceiver is configured to receive uplink information and send corresponding touch coordinate information, first-type downlink information, and second-type downlink information through at least one data channel. The first control circuit is coupled to the first transceiver. The first control circuit generates the touch coordinate information and multiple downlink information based on the uplink information and classifies the downlink information into the first-type downlink information or the second-type downlink information according to the amount of data and a required transmission frequency thereof. A touch system including the active pen is also provided.