Timing Control Circuit Switching Long H/V Modes to Reduce Display Noise
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Solution Overview
Problem
Existing touch-and-display-driver integrated circuits (TDDIs) face challenges in improving display quality and reliability due to noise interference and irrecoverable display issues during touch operations.
Innovation Solution
A timing control circuit and method that switches between long H and long V modes, adjusting frame periods and touch operation times to optimize display and touch operations, using a receiving circuit, line memory, and timing generation circuit to manage pixel data and touch signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If display and touch operations are performed simultaneously in TDDI, then operation efficiency is improved, but noise interference occurs that affects touch operation and produces wrong display results
Solution Approach 1:
The patent divides the frame period into distinct display operation periods and touch operation periods, separating simultaneous operations into sequential time slots. This segmentation eliminates noise interference between display and touch operations while maintaining overall system productivity through efficient time-division multiplexing.
Solution Approach 2:
The patent implements periodic alternation between display operation periods and touch operation periods within each frame period. This periodic action ensures that display and touch operations occur in organized cycles, preventing noise interference while maintaining high operation efficiency through consistent time-division scheduling.
2Productivity
If touch operation time is extended to improve touch report rate, then touch responsiveness is improved, but display operation time is reduced causing display quality degradation
Solution Approach 1:
The patent dynamically adjusts the allocation of time between display operation periods and touch operation periods based on system requirements. By making these time allocations flexible rather than fixed, the system can optimize touch report rate while ensuring minimum display quality thresholds are maintained through adaptive time management.
Solution Approach 2:
The patent changes the temporal parameters of operation periods within the frame structure. By adjusting the duration and positioning of display and touch operation periods as configurable parameters, the system achieves improved touch report rate while preserving display quality through optimized parameter selection.
3Duration of action of moving object
If frame period is extended to accommodate both display and touch operations, then operation completeness is improved, but time delay increases affecting real-time performance
Solution Approach 1:
The patent ensures continuous utilization of the frame period by eliminating idle time between display and touch operations. Through seamless transition between operation periods and efficient time-division scheduling, the system achieves complete operation coverage within the frame period without introducing unnecessary time delays.
Solution Approach 2:
The patent performs preliminary planning of operation periods within each frame period, pre-allocating time slots for display and touch operations. This preliminary action enables optimized scheduling that completes all necessary operations within the frame period while minimizing time delay and maintaining real-time performance.
Data Source
AI summary
A timing control circuit includes a receiving circuit and a line memory coupled to the receiving circuit. The line memory is configured for outputting a first data signal during a first frame period, and outputting a second data signal during a second frame period. An end time point of the first frame period coincides with the start time point of the second frame period. One of the first data signal and the second data signal is corresponding to a long H mode; the other of the first data signal and the second data signal is corresponding to a long V mode.