Touch Display Module Dual-End Circuit Layout Signal Delay Reduction
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Solution Overview
Problem
Touch display panels in existing technologies suffer from poor display effects due to significant delay and voltage drop in signal transmission, leading to inconsistent display brightness and striped patterns, primarily because the touch circuit is located at one end of the substrate, causing large differences in common voltage signals received by electrode blocks.
Innovation Solution
A touch display module with an auxiliary circuit located at the opposite end of the substrate, where both the touch circuit and auxiliary circuit provide display and supplementary display signals to electrode lines, reducing signal delay and voltage drop by ensuring simultaneous signal transmission at both ends of the electrode lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the touch circuit is located at one end of the substrate, then the device structure is simplified, but signal delay and voltage drop increase significantly
Solution Approach 1:
The patent divides the substrate into multiple regions with touch circuits positioned at both ends (first end and second end), segmenting the signal transmission path. This segmentation reduces the distance signals must travel across the electrode lines, thereby reducing signal delay and voltage drop while maintaining a relatively simple overall device structure.
2Device complexity
If the touch circuit is located at one end of the substrate, then the device structure is simplified, but display brightness uniformity deteriorates
Solution Approach 1:
By positioning touch circuits at both ends of the substrate, the patent segments the display region into multiple zones, each served by a nearby touch circuit. This ensures that common voltage signals are supplied from both ends, reducing voltage drop across electrode lines and achieving uniform display brightness across the entire display region without significantly increasing device complexity.
3Reliability
If electrode lines are made longer to connect distant electrode blocks, then all electrode blocks can be connected, but voltage drop and signal delay increase
Solution Approach 1:
The patent segments the substrate into multiple regions with touch circuits at both ends, creating multiple shorter signal transmission paths. This segmentation allows electrode blocks to be connected through shorter electrode lines, ensuring reliable connectivity while reducing voltage drop and signal delay compared to using a single long transmission path from one end.
4Reliability
If electrode lines are made longer to connect distant electrode blocks, then all electrode blocks can be connected, but signal transmission time increases
Solution Approach 1:
By positioning touch circuits at both ends of the substrate, the patent creates multiple shorter signal transmission paths for connecting electrode blocks. This segmentation reduces the maximum distance signals must travel, thereby reducing signal transmission time while ensuring all electrode blocks remain reliably connected.
Data Source
AI summary
A touch display module, a controlling method, a panel and a display device are provided in embodiments of the disclosure, all belong to the technical field of display technology, the touch display module including: a touch circuit, an auxiliary circuit, a base substrate, a plurality of electrode blocks and a plurality of electrode lines; the touch circuit is configured to provide the plurality of electrode lines with respective display signals at a display stage, and to provide the plurality of electrode lines with respective touch signals at a touch stage; and the auxiliary circuit is configured to provide the plurality of electrode lines with respective display signals at the display stage, and to stop providing the plurality of electrode lines with the respective display signals at the touch stage.