Touch Control Display Panel Signal Routing
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Solution Overview
Problem
Conventional in-cell touch control display panels face issues with reduced light transmittance due to the wide pattern of the black matrix covering touch control signal lines and data lines, leading to a lower aperture ratio and increased risk of short circuiting between touch control signal lines and data lines.
Innovation Solution
The touch control display panel incorporates an array substrate with touch control signal lines arranged within the opening regions of pixel subunits, allowing the black matrix to cover only the gate and data lines, thus reducing the width of the black matrix and minimizing the risk of short circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the black matrix covers the touch control signal lines and data lines, then the short circuiting risk is reduced, but the aperture ratio and light transmittance are reduced
Solution Approach 1:
The patent extracts the touch control signal lines from the region covered by the black matrix, relocating them to the opening regions of pixel subunits. This separation allows the black matrix to cover only the gate lines and data lines, removing the unnecessary coverage over touch control signal lines while maintaining short circuit prevention where needed.
Solution Approach 2:
The patent utilizes the opening regions of pixel subunits as an alternative spatial dimension for routing touch control signal lines. By moving these lines to a different spatial location (the opening regions), the design achieves both goals: maintaining reliability through selective black matrix coverage while improving light transmittance by reducing the black matrix area.
2Reliability
If the black matrix pattern is widened to cover touch control signal lines, then the short circuiting risk is reduced, but the aperture ratio is reduced
Solution Approach 1:
The patent extracts the touch control signal lines from the black matrix coverage area and relocates them to the opening regions of pixel subunits. This extraction allows the black matrix to be narrowed, covering only the gate lines and data lines, thereby increasing the aperture ratio while maintaining short circuit prevention where needed.
Solution Approach 2:
The patent applies the black matrix selectively in different regions: it covers the gate lines and data lines to prevent short circuiting, but does not cover the touch control signal lines located in the opening regions. This localized application of the black matrix optimizes both reliability and aperture ratio by applying coverage only where necessary.
3Illumination intensity
If the touch control signal lines are placed in the opening regions of pixel subunits, then the light transmittance is improved, but the risk of short circuiting with data lines increases
Solution Approach 1:
The patent extracts the touch control signal lines from the data line regions and relocates them to the opening regions of pixel subunits. This spatial separation eliminates the short circuiting risk between touch control signal lines and data lines while maximizing light transmittance through the opening regions.
Solution Approach 2:
The patent utilizes the opening regions of pixel subunits as an alternative spatial dimension for routing touch control signal lines, away from the data line regions. This dimensional relocation resolves the short circuiting risk while maintaining optimal light transmittance properties.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A touch control display panel includes an array substrate, which includes a substrate, a pixel unit including a plurality of pixel subunits, and a touch control signal line. Both the pixel unit and the touch control signal line are over the substrate. An orthographic projection of the touch control signal line on the substrate is located in an opening region of one pixel subunit on the substrate. The one pixel subunit can include a first electrode and a second electrode, one or both having at least one gap, each arranged between two adjacent portions thereof. An orthographic projection of the touch control signal line on the substrate can be contained within an orthographic projection of one gap in one or both of the first electrode and the second electrode on the substrate.