Display Driving Signal Timing for Low-Speed Touch Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face delays in touch operations when operating in low-speed driving modes due to reduced power consumption, as they perform minimal touch sensing per frame, leading to delayed touch recognition.
Innovation Solution
A driving signal output device and method that includes a display driving circuit for outputting signals in display intervals within data writing intervals and a touch driving circuit for identifying touches within touch sensing intervals, allowing for touch detection and position identification within one data writing interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device operates in low-speed driving mode to reduce power consumption, then power consumption is reduced, but touch operation delay increases
Solution Approach 1:
The data writing interval is segmented into multiple touch sensing intervals (first, second, third touch sensing intervals) distributed across different frames. This allows touch sensing to occur periodically at multiple points rather than waiting for the next complete frame, significantly reducing touch operation delay while maintaining low power consumption in LRR mode.
2Use of energy by moving object
If minimal touch sensing is performed per frame in low-speed driving mode, then power consumption is reduced, but touch recognition speed decreases
Solution Approach 1:
The system performs preliminary touch sensing in the first touch sensing interval before the frame ends. When a touch is detected, the system proactively identifies the touch position in subsequent intervals within the same data writing interval, rather than waiting for the next frame. This preliminary action enables faster touch recognition while maintaining reduced power consumption.
Data Source
AI summary
A driving signal output device according to an embodiment comprise a display driving circuit configured to output a display driving signal in a display interval within a first data writing interval, in a low-speed driving mode in which a data holding interval is located between data writing intervals, and a touch driving circuit configured to identify that a first touch is detected in a first touch sensing interval within the first data writing interval and to identify a position of the first touch in a second touch sensing interval within the first data writing interval.