Display Substrate Reducing Data Driver Chips via Segmented Touch Electrodes
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Solution Overview
Problem
Current Touch and Display Driver Integration (TDDI) products have high production costs due to the integration of touch and display functions in a single data driver chip, leading to a high number of data driver chips required.
Innovation Solution
A display substrate design that reduces the number of data lines and touch signal lines, allowing for a lower number of data driver chips by integrating touch functionality into the display substrate itself.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch and display functions are integrated in a single data driver chip (TDDI), then device integration is improved, but the number of data driver chips required increases and production cost increases
Solution Approach 1:
The patent segments the touch and display functions by separating the touch sensing electrodes from the display data lines. The touch electrodes are formed in the gaps between data lines, allowing independent control and reducing the need for integrated TDDI chips. This segmentation enables simpler driver chip architecture while maintaining both touch and display functionality.
Solution Approach 2:
The patent utilizes the spatial dimension by arranging touch electrodes in the vertical gaps between horizontal data lines. This dimensional arrangement allows touch sensing functionality to coexist with display data transmission without requiring integration in the same planar space, thereby reducing the number of chips needed while maintaining functional separation.
2Quantity of substance
If the number of data lines is reduced, then the number of data driver chips decreases, but the complexity of line arrangement and electrode configuration increases
Solution Approach 1:
The patent applies local quality by forming touch electrodes specifically in the gap regions between data lines, rather than requiring uniform restructuring of the entire display architecture. This localized approach allows reduced data line count while maintaining touch functionality without significantly increasing overall system complexity.
3Measurement precision
If touch electrodes are placed between data lines, then touch sensitivity is improved, but the risk of signal interference between touch and display signals increases
Solution Approach 1:
The patent introduces an intermediary structure by forming touch electrodes in the gaps between data lines, where they naturally serve as capacitive sensing elements without direct electrical connection to data lines. This intermediary positioning allows touch signal detection while maintaining electrical isolation from display data signals, reducing interference risk.
Data Source
AI summary
The embodiment of the present disclosure provides a display substrate including a plurality of gate lines and a plurality of data lines. The plurality of gate lines each extend along a first direction, and the plurality of data lines each extend along a second direction. The plurality of data lines are spatially crossed with the plurality of gate lines to define a plurality of pixel regions, and at least one sub-pixel is provided in each of the plurality of pixel regions. At least three sub-pixels adjacent to each other along the second direction form one of a plurality of pixels. All the sub-pixels within one of the plurality of pixels are coupled to a same data line of the plurality of data lines.