Display Panel Block Structure to Prevent Touch Line Short Circuits
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Solution Overview
Problem
Existing display panels face issues with metal residue accumulation at the edges of block portions due to high altitude differences, leading to short circuits between touch signal lines, which affects yield and manufacturing efficiency.
Innovation Solution
The display panel design incorporates a first block portion with a first sub-block portion and a second sub-block portion of varying sizes, forming a slope angle between 20° to 35°, reducing the slope angle at the edge to minimize metal residue and prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a block portion with high altitude difference is used to prevent organic insulation layer overflow, then encapsulation effectiveness is improved, but metal residue accumulation occurs at edges causing short circuits between touch signal lines
Solution Approach 1:
The first block layer is divided into a first sub-block portion and a second sub-block portion with different thicknesses. The first sub-block portion has a greater thickness than the second sub-block portion, creating a stepped structure that reduces the altitude difference at the edge of the block portion. This segmentation prevents metal residue accumulation while maintaining encapsulation effectiveness.
Solution Approach 2:
Different regions of the first block layer are given different thicknesses to address local problems. The first sub-block portion (closer to the display region) has greater thickness for effective blocking, while the second sub-block portion (at the edge) has lesser thickness to reduce altitude difference and prevent metal residue. This local differentiation resolves the contradiction between encapsulation effectiveness and metal residue prevention.
2Ease of manufacture
If the block portion structure is simplified, then manufacturing process is easier, but metal residue accumulation causes short circuits reducing yield
Solution Approach 1:
The first block layer is segmented into two sub-portions with different thicknesses formed in a single patterning process. This segmentation approach maintains manufacturing simplicity while effectively preventing metal residue accumulation, thus preserving both ease of manufacture and production yield.
Solution Approach 2:
The thickness parameter of the first block layer is varied across different regions to create the stepped structure. By changing the thickness parameter locally (greater thickness in first sub-block portion, lesser thickness in second sub-block portion), the invention prevents metal residue accumulation without complicating the manufacturing process.
3Reliability
If a steep slope angle is formed at the block portion edge, then organic insulation layer containment is improved, but metal residue accumulates causing short circuits
Solution Approach 1:
The block portion is segmented into sub-portions with different thicknesses, creating a stepped structure. This segmentation allows the organic insulation layer to be effectively contained by the thicker first sub-block portion while the thinner second sub-block portion at the edge prevents metal residue accumulation, thereby maintaining containment effectiveness while reducing short circuit probability.
Solution Approach 2:
Different regions of the block portion are given different thickness qualities. The first sub-block portion has greater thickness for containment, while the second sub-block portion has lesser thickness to prevent metal residue. This local quality differentiation resolves the contradiction between containment effectiveness and short circuit prevention.
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 reduces the probability of short circuits between touch signal lines, enhancing yield and manufacturing efficiency by ensuring a smoother transition at the edge of the block portions.
Implementation Method 1
triplet excitons converted into singlet excitons in a host-guest system through thermal energy exchange
Implementation Method 2
triplet excitons converted into singlet excitons in a host-guest system through thermal energy exchange
Data Source
Figure 1A~2A
Figure 2B~2D
Figure 2E~3
AI summary
A display panel, a manufacturing method thereof, and a display device. The display panel includes a base substrate (100), a first block portion (200), an encapsulation layer (300) and a touch signal line (400). The first block portion (200) is located in the peripheral region (102), the first block portion (200) includes a first block layer (210) and a second block layer (220); the encapsulation layer (300) covers the first block portion (200); the touch signal line (400) is located on the encapsulation layer (300) and covers a part of the first block portion (200). The first block layer (210) includes a first sub-block portion (211) and a second sub-block portion (212). The second sub-block portion (212) is located between the first sub-block portion (211) and the second block layer (220), a maximum size of the second sub-block portion (212) is not greater than a minimum size of the first sub-block portion (211). The first sub-block portion and the second sub-block portion with different sizes are formed in the first block layer, which can reduce the probability of short-circuit between touch signal lines.