Display Panel Electrode Structure for High-PPI Light Transmission
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Solution Overview
Problem
Micro OLED display products face high costs and complex manufacturing processes, making them difficult to popularize, especially for high PPI applications.
Innovation Solution
A display panel design with a base substrate, first transistor, and first electrode connected through a first through hole in a light-transmitting region, utilizing a two-step connecting electrode structure for easier electrical connection, enhancing the effective area of the electrode and improving light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Micro OLED structure is used to achieve high PPI display, then display resolution is improved, but manufacturing cost increases and process complexity increases
Solution Approach 1:
The patent segments the connection path into two separate through-holes: a first through-hole in the first insulating layer and a second through-hole in the second insulating layer. This segmentation allows each layer to be processed and connected independently, simplifying the manufacturing process while achieving the same electrical connection function, thereby reducing process complexity while maintaining high display resolution
Solution Approach 2:
The patent introduces a vertical layering dimension by creating through-holes in multiple insulating layers (first and second insulating layers) rather than a single thick layer. This multi-dimensional approach distributes the connection function across different vertical levels, making the manufacturing process more manageable and reducing overall process complexity while preserving high PPI display capabilities
2Area of stationary object
If traditional single through-hole connection is used, then structure is simple, but electrode effective area is reduced and light transmittance is lowered
Solution Approach 1:
The connection structure is segmented into two separate through-holes distributed in different insulating layers. This segmentation allows the electrode to maintain a larger continuous effective area in the display region while achieving electrical connection through multiple distributed points, thereby increasing the electrode effective area and improving light transmittance without excessive structural complexity
Solution Approach 2:
The patent moves the connection function to multiple vertical dimensions by creating through-holes in both the first and second insulating layers. This multi-level vertical distribution allows the electrode in the display region to remain large and continuous for better light transmittance, while connections are established through distributed points in different vertical layers, resolving the contradiction between electrode area and structural complexity
Data Source
AI summary
A display panel, a display apparatus, and a manufacturing method for a display panel. The display panel is provided with a display area and a non-display area located on the periphery of the display area, the display area is provided with light-transmitting areas. The display panel includes: a substrate; a first transistor located in the display area on one side of the substrate and includes a first active layer; a first electrode located on the side of the first active layer that faces away from the substrate; and a first insulating layer located between the first active layer and the first electrode, comes into contact with the first electrode, and is provided with a first via hole that penetrates the first insulating layer, the orthographic projection of the first via hole on the substrate is located in the orthographic projection of the light-transmitting areas on the substrate.