Input Sensor Timing for Non-Overlapping Touch and Pen Sensing
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Solution Overview
Problem
Existing display devices struggle to efficiently sense both touch and pen inputs simultaneously without overlapping sensing periods, leading to interference and reduced accuracy.
Innovation Solution
A sensor system with adjustable sensing periods for touch and pen inputs, including a first sensing frame with non-overlapping touch and pen sensing periods, and additional blank periods for precise coordinate acquisition, utilizing multiple sensing electrodes and a sensor controller to manage these periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sensing periods for touch and pen inputs are overlapped, then the sensing efficiency is improved, but the sensing accuracy deteriorates due to interference
Solution Approach 1:
The sensing frame is divided into multiple non-overlapping sensing periods: a first sensing period for touch input and a second sensing period for pen input. This temporal segmentation allows both input types to be sensed without interference while maintaining high sensing efficiency through continuous operation.
2Measurement precision
If the sensing periods for touch and pen inputs are made non-overlapping, then the sensing accuracy is improved, but the device complexity increases
Solution Approach 1:
The sensor controller operates in a periodic manner, sequentially executing the first sensing period for touch input and the second sensing period for pen input within each sensing frame. This periodic control structure achieves accurate non-overlapping sensing while maintaining manageable system complexity through systematic timing.
3Productivity
If the duration of the first blank period is decreased, then the productivity is improved, but the reliability deteriorates
Solution Approach 1:
The duration of the first blank period is made adjustable and dynamically optimized. The sensor controller adapts the blank period duration to balance the need for stable coordinate acquisition (reliability) with the need for efficient sensing cycles (productivity), allowing the system to respond to different usage scenarios flexibly.
Data Source
AI summary
An input sensor including: a sensor including a sensing electrode for sensing a touch input and a pen sensing electrode for sensing a pen input; and a sensor controller configured to acquire a first coordinate based on a touch sensing signal received from the sensing electrode and acquire a second coordinate based on a pen sensing signal received from the pen sensing electrode during a first sensing frame, wherein the first sensing frame includes a first blank period, a touch sensing period for sensing the touch input, and a pen sensing period for sensing the pen input, wherein the first blank period, the touch sensing period, and the pen sensing period are sequentially arranged, and wherein a duration of the first blank period and a duration of the pen sensing period are adjustable.