Active Pen Touch Position Detection Using Dynamic Sensor Region Segmentation
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Solution Overview
Problem
Conventional methods for detecting the touch position of an active pen on a terminal screen require all sensors to be constantly enabled, leading to low flexibility and high power consumption, as they collect downlink signals from the entire screen area without the ability to selectively disable unnecessary sensors.
Innovation Solution
The method involves determining a first touch position and disabling sensors outside a preset region, allowing only sensors within that region to collect downlink signals, thereby reducing power consumption and improving detection flexibility by focusing on a smaller area for subsequent touch position calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all sensors are constantly enabled to detect touch position, then detection accuracy is maintained, but power consumption increases and detection flexibility decreases
Solution Approach 1:
The sensor array is divided into multiple regions, and based on the detected touch position, only the sensors in the relevant region are enabled while others are disabled. This segmentation allows the system to maintain detection accuracy at the touch location while significantly reducing overall power consumption by keeping unnecessary sensors off.
Solution Approach 2:
Different regions of the sensor array have different operational states. The region containing the touch position has sensors enabled for accurate detection, while other regions have sensors disabled. This local quality approach ensures high measurement precision where needed without the cost of enabling all sensors uniformly.
2Area of stationary object
If all sensors are constantly enabled to collect downlink signals, then detection coverage is complete, but device complexity and processing load increase
Solution Approach 1:
The sensor array is segmented into functional regions. Based on the touch position, only the relevant segment (region) is activated for signal collection and processing. This reduces the number of sensors involved in each detection cycle, thereby reducing processing complexity while maintaining complete coverage capability when needed.
Solution Approach 2:
Instead of enabling all sensors for every detection cycle, the system enables only the partial set of sensors needed for the current touch position. This partial action approach reduces processing complexity and computational load while still providing sufficient detection coverage for the active touch area.
3Ease of manufacture
If a fixed detection method is used for continuous touch position detection, then implementation is simple, but detection flexibility is low
Solution Approach 1:
The detection method transitions from a fixed static approach to a dynamic adaptive approach. Based on the detected touch position, the system dynamically adjusts which sensors are enabled and how the detection region is defined. This dynamic adaptation provides high detection flexibility for various touch scenarios while maintaining relatively simple implementation through automated region selection algorithms.
Data Source
AI summary
When a touch position of an active pen on a screen of an electronic terminal is detected, and once a first touch position of the active pen on the screen of the electronic terminal is detected based on downlink signals collected by sensors under the screen of the electronic terminal, sensors outside a first preset region including the first touch position are disabled, where sensors in the first preset region are still in a working mode. In addition, a quantity of sensors in the first preset region is less than a quantity of sensors under the screen of the electronic terminal. In this way, when a second touch position of the active pen on the screen of the electronic terminal is subsequently determined, downlink signals sent by the active pen are collected only by using the sensors in the first preset region, instead of always by using all sensors under the screen of the electronic terminal, so that detection flexibility is improved.