OLED Array Substrate Mounting Hole Metal Electrode Expansion
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Solution Overview
Problem
In OLED display panels, the proximity of mounting holes to display regions creates a steep slope in the planarization layer, which interferes with touch performance by preventing normal coverage of metal lines with photoresist and leading to overexposure or breakage during exposure processes, especially when the distance between the mounting hole blocking column and the display region blocking column is less than or equal to 2000 μm.
Innovation Solution
The size of the first metal electrode block adjoining the mounting hole is expanded outwardly to avoid the influence of the steep slope of the planarization layer, while the second metal electrode block adjoining the mounting hole shrinks inwardly, ensuring that the first metal electrode block has a partial region without overlapping with the climbing region of the planarization layer, thus maintaining touch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the distance between mounting hole blocking column and display region blocking column is reduced to less than or equal to 2000 μm, then the mounting hole can be placed closer to the display region achieving full screen, but a steep slope is formed in the planarization layer which interferes with touch performance
Solution Approach 1:
The patent applies local quality by making the first metal electrode block have different dimensions in different regions. Specifically, the first metal electrode block has a first dimension in the first direction where it adjoins the mounting hole, and a second dimension in the second direction that is different from the first dimension. This local variation in dimensions allows the electrode block to adapt to the steep slope region while maintaining proper functionality, thereby resolving the contradiction between achieving full screen and maintaining touch performance.
2Reliability
If the first metal electrode block size is expanded to avoid steep slope influence, then touch performance is maintained, but the electrode block occupies more space
Solution Approach 1:
The patent applies parameter changes by modifying the dimensions of the first metal electrode block. The first metal electrode block has a first dimension in the first direction and a second dimension in the second direction, where the second dimension is different from the first dimension. This parameter adjustment allows the electrode block to extend sufficiently to avoid the steep slope region and maintain touch performance, while optimizing the occupied space through anisotropic dimensioning.
Data Source
AI summary
The present disclosure provides an array substrate, a display panel and a display apparatus to avoid influence of a steep slope of a planarization layer on touch performance. The array substrate includes a display region and a mounting hole located in the display region. A side of the mounting hole where a part of a mounting hole blocking column from which a distance of a display region blocking column is less than or equal to 2000 μm is located is denoted as a first side; the array substrate further includes a first metal electrode structure including a plurality of first metal electrodes disposed along a direction perpendicular to the first side, and each of the first metal electrodes includes a plurality of first metal electrode blocks electrically connected with each other in sequence; a size of a first metal electrode block adjoining the first side of the mounting hole expands outwardly in a direction of the first side on a basis of a size of a first metal electrode block not adjoining the first side of the mounting hole. The display panel includes the array substrate. The display apparatus includes the display panel.