Active Pen Pressure Detection Reducing Display Delay
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Solution Overview
Problem
The delayed transmission of pressure data from an active pen to a screen via wireless communication leads to a delayed display of handwriting, affecting user experience due to the inclination of the pen and the resulting deviation in position coordinates.
Innovation Solution
A pressure detection method that uses a first electrode to determine the position of the active pen and a second electrode to calibrate its inclination, with the second electrode outputting a driving signal when pressure is detected, allowing for immediate display of handwriting based on a preset pressure until actual pressure data is received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure data is transmitted via wireless communication from active pen to screen, then pressure detection function is achieved, but transmission delay occurs leading to delayed handwriting display
Solution Approach 1:
The system performs preliminary action by displaying handwriting on the screen using the last received pressure data before the actual pressure data arrives. This allows the display to show handwriting continuously without waiting for wireless transmission delays, improving responsiveness while maintaining pressure detection accuracy through subsequent data updates.
2Adaptability or versatility
If pressure sensor is disposed in active pen and transmits data wirelessly, then pressure detection is enabled, but transmission delay affects user experience
Solution Approach 1:
The system applies preliminary action by pre-displaying handwriting using stored pressure data before new pressure data arrives via wireless transmission. This ensures continuous handwriting display without interruptions or delays, maintaining both pressure detection versatility and responsive user experience.
3Loss of information
If wireless communication is used for pressure data transmission, then pressure information can be obtained, but the handwriting display is delayed affecting real-time feedback
Solution Approach 1:
The system performs preliminary action by displaying handwriting using the most recently received pressure data before new data arrives. This ensures continuous real-time feedback display without waiting for wireless transmission, while pressure information completeness is maintained through ongoing data updates from the pressure sensor.
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 method reduces the delay in displaying writing pressure on the screen, enhancing user experience by ensuring immediate feedback of pen movements and pressure changes.
Implementation Method 1
a first detecting signal corresponding to the first driving signal is used to determine a position of the active pen on the screen
Implementation Method 2
a second detecting signal corresponding to the second driving signal is used to calibrate a position of the active pen
Data Source
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AI summary
A method (300) for pressure detection is provided, which can avoid a delayed display of a writing pressure generated by the active pen (100) on the screen. The method (300) is used to detect a pressure generated by the active pen (100) on the screen of the electronic device. The active pen (100) includes a first electrode (101), a second electrode (102) and a pressure sensor, where the first electrode (101) is configured to output a first driving signal, the second electrode(102) is configured to output a second driving signal when the pressure sensor detects a first pressure generated by the active pen (100), a first detecting signal corresponding to the first driving signal is configured to determine a position of the active pen (100) on the screen, and a second detecting signal corresponding to the second driving signal is configured to calibrate the position. The method (300) includes: when information of the first pressure is not received, determining (310) whether the active pen (100) is pressing the screen according to the second detecting signal; if it is determined that the active pen (100) is pressing the screen, displaying (320) handwriting of the active pen (100) on the screen according to a second pressure, where the second pressure is a preset pressure.