Display Driving Device Region Segmentation for Simultaneous Touch
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Solution Overview
Problem
Current display technologies face challenges in simultaneously performing display operations and touch operations due to noise interference from inner panel signals, which requires separate periods for display and touch operations.
Innovation Solution
A display driving device and method that differentiate a panel into an output region and multiple receiver regions, allowing the display operation and touch operation to be performed simultaneously by outputting detection signals and point report signals across different periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the touch electrodes are used to detect touch signals, then touch operation is enabled, but noise is generated due to interference from inner panel signals
Solution Approach 1:
The panel is divided into multiple independent regions (first region, second region, third region) that can operate in different time periods. This segmentation allows the output region to perform display operations while receiver regions perform touch detection operations in overlapping time periods, enabling simultaneous operation without mutual interference and eliminating noise from inner panel signals during touch detection.
2Reliability
If separate periods are used for display operation and touch operation, then noise interference is avoided, but operation efficiency is reduced
Solution Approach 1:
The invention implements periodic time-division multiplexing where different regions of the panel operate in alternating time periods. The output region outputs detection signals in first, second, and third time periods while receiver regions output point report signals in overlapping periods. This periodic action allows both display and touch operations to occur simultaneously across different regions, maintaining noise avoidance while significantly improving operation efficiency.
Solution Approach 2:
The invention transitions from temporal separation (single time dimension) to spatial-temporal parallel operation by dividing the panel into multiple regions that operate in different time periods. This adds a spatial dimension to the time-division multiplexing, allowing display and touch operations to overlap in time while being separated in space, thereby achieving both noise avoidance and high efficiency.
3Productivity
If the panel is differentiated into multiple regions for simultaneous display and touch operations, then operation efficiency is improved, but device complexity increases
Solution Approach 1:
The panel is segmented into multiple regions (output region, first region, second region, third region) with distinct functions. The output region generates detection signals while receiver regions detect touch signals. This functional segmentation enables simultaneous display and touch operations, improving efficiency while maintaining manageable complexity through clear regional differentiation.
Solution Approach 2:
The panel regions serve multiple functions: the output region both displays content and generates detection signals for touch operations, while receiver regions both receive detection signals and output point report signals. This multi-functionality reduces the need for separate dedicated components, thereby improving operation efficiency without proportionally increasing device complexity.
Data Source
AI summary
A display driving device includes a panel. The panel includes an output region, a first region, a second region, and a third region. The output region is configured to output a detection signal. The first region overlaps the output region, the second region overlaps the output region, and the third region overlaps the output region. During a first period, the second region and the third region output a point report signal according to the detection signal. During a second period, the first region and the third region output the point report signal according to the detection signal. During a third period, the first region and the second region output the point report signal according to the detection signal. The second period is later than the first period and the third period is later than the second period.