In-Cell Touch Display Panel Layer Separation
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Solution Overview
Problem
In in-cell touch screens, the arrangement of touch signal lines alongside data lines can lead to short circuits and uneven lighting environments, compromising display accuracy and touch sensitivity due to the close spacing of sub-pixels and the need for multiple touch detection electrodes.
Innovation Solution
The display panel design features touch signal lines and data lines in separate layers, with sub-pixels arranged in alignment and spaced closely in the column direction, ensuring insulation between the two and preventing short circuits while maintaining display accuracy by using a common electrode layer for touch detection and optimizing the arrangement of touch signal lines to avoid frame thickness issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If touch signal lines are arranged in the same layer as data lines, then the manufacturing process is simplified, but short circuits occur between data lines and touch signal lines
Solution Approach 1:
The patent resolves the contradiction by moving touch signal lines from the same layer as data lines to a different layer (either above or below), adding a dimensional separation. This layer differentiation eliminates short circuits while maintaining manufacturing feasibility through sequential layer formation processes.
Solution Approach 2:
The patent introduces an insulating layer as an intermediary between data lines and touch signal lines when they must coexist in close proximity. This intermediate insulating structure prevents direct electrical contact and short circuits while allowing both signal types to be present in the same general region.
2Measurement precision
If multiple touch detection electrodes are arranged to meet touch accuracy requirements, then touch accuracy is improved, but the number of touch signal lines increases, creating more short circuit risks with data lines
Solution Approach 1:
The patent reduces short circuit risk by arranging touch signal lines in a different layer from data lines, allowing multiple touch signal lines to be densely packed to meet touch accuracy requirements without increasing the probability of short circuits, as the vertical layer separation prevents lateral interference.
3Ease of operation
If touch signal lines are drawn from left and right ends of the display panel, then connection is achieved, but narrow frame design is compromised
Solution Approach 1:
The patent enables narrow frame design by routing touch signal lines through the vertical dimension (different layers) rather than requiring long lateral extensions from left and right ends. This allows signal connections to be achieved with shorter path lengths while maintaining access to all touch detection electrodes.
4Manufacturing precision
If sub-pixels in adjacent rows are spaced closely to enable rendering technology, then display accuracy is improved, but the proximity increases short circuit risk between data lines and touch signal lines
Solution Approach 1:
The patent maintains close horizontal spacing of sub-pixels for high display accuracy while preventing short circuits by separating data lines and touch signal lines into different vertical layers. This dimensional separation allows dense pixel packing without compromising electrical isolation between different signal types.
Data Source
AI summary
A display panel, including: a pixel structure constituted by a plurality of sub-pixels, wherein sub-pixels in each row are arranged in alignment, sub-pixels in every two adjacent rows are spaced in a column direction by a distance of X sub-pixels, 0<X<1, and a color of each sub-pixel differs from a color of an adjacent sub-pixel; a plurality of data lines arranged at column gaps between the sub-pixels; a plurality of touch signal lines arranged at gaps between the sub-pixels, wherein the plurality of touch signal lines are arranged in a different layer from the plurality of data lines and are insulated from the plurality of data lines; and a plurality of touch detection electrodes connected with the plurality of touch signal lines. A method for manufacturing the above display panel and a display device.