Touch Display Panel Electrode Area Compensation for Split-Screen
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Solution Overview
Problem
Touch display panels often experience a split-screen phenomenon due to differences in the lengths and impedances of touch signal lines, leading to inconsistent voltage recovery and reduced display quality and user experience.
Innovation Solution
The touch display panel design includes multiple touch electrode rows with varying numbers of touch signal lines, where the first touch electrode row has more signal lines than the second, and the area of touch electrodes in these rows is adjusted to ensure consistent voltage recovery, using an area difference compensation design to minimize capacitive coupling and disturbance during pixel voltage charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If touch signal lines have different lengths and impedances, then the touch panel can accommodate more touch electrodes, but the voltage recovery becomes inconsistent causing split-screen phenomenon
Solution Approach 1:
The patent divides touch electrode rows into different types (first type and second type) with different numbers of signal lines connected to each electrode. Specifically, electrodes in first touch electrode rows have a first number of signal lines while electrodes in second touch electrode rows have a second number of signal lines. This local differentiation compensates for the varying signal line lengths and impedances, ensuring consistent voltage recovery across all electrodes regardless of their position in the matrix.
2Reliability
If more touch signal lines are connected to each touch electrode, then the voltage recovery is improved, but the device complexity increases
Solution Approach 1:
The patent segments the touch electrode rows into different types based on their position in the matrix. First touch electrode rows are configured with a certain number of signal lines while second touch electrode rows are configured with a different number of signal lines. This segmentation allows the system to optimize signal line allocation for different regions, improving voltage recovery consistency without uniformly increasing the complexity across the entire device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces the split-screen phenomenon, improves display quality, and enhances user experience by ensuring consistent voltage recovery across touch electrodes, even at high frequencies.
Implementation Method 1
each touch electrode of the plurality of touch electrodes is electrically connected to a signal input terminal of the plurality of signal input terminals through at least one touch signal line
Implementation Method 2
the area of the touch electrode in the at least one B-th touch electrode row is smaller than an area of the touch electrode in the at least one A-th touch electrode row; and the area of the touch electrode in the at least one B-th touch electrode row is smaller than an area of the touch electrode in the at least one C-th touch electrode row
Data Source
AI summary
A touch display panel and a touch display device are provided. The touch electrode rows of the display panel include first touch electrode rows and second touch electrode rows. A number of touch signal lines connected to each touch electrode of the first touch electrode rows is greater than a number of touch signal lines connected to each touch electrode of the second touch electrode rows. The first touch electrode rows include an A-th touch electrode row; and the second touch electrode rows includes a B-th touch electrode row and a C-th touch electrode row adjacent to the B-th touch electrode row. An area of a touch electrode in the B-th touch electrode row is smaller than an area of a touch electrode in the A-th touch electrode row, and smaller than an area of a touch electrode in the C-th touch electrode row.