OLED Display Device Peripheral Area Segmentation
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Solution Overview
Problem
In organic light emitting diode (OLED) display devices, the continuous organic layers in peripheral areas can allow residual gases from the manufacturing process to penetrate into the display area, damaging pixel structures, leading to increased dead space and reduced efficiency.
Innovation Solution
The OLED display device incorporates a substrate with distinct circuit areas and a blocking area, where capacitors and transistors are strategically positioned to minimize the organic layer's presence in the peripheral area, reducing the dead space by placing the first and second capacitors within the blocking area, thus decreasing the area required for circuit structures in the peripheral region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the organic layer is continuously disposed in the peripheral area, then the manufacturing process is simpler and more uniform, but residual gases can penetrate into the display area through the organic layers, damaging pixel structures
Solution Approach 1:
The patent divides the peripheral area into multiple separate circuit areas (first circuit area, second circuit area, etc.) that are spatially isolated from each other by removing organic layers in between. This segmentation prevents residual gases generated in one circuit area from penetrating to pixel structures in other areas, while still allowing continuous organic layer deposition within each isolated circuit area during manufacturing.
2Reliability
If openings are formed in the organic layer in the peripheral area to prevent residual gas penetration, then pixel structures are protected from damage, but the area of the peripheral area increases
Solution Approach 1:
Instead of forming openings in the organic layer, the patent segments the peripheral area into multiple isolated circuit areas by completely removing organic layers between them. This approach protects pixel structures from residual gas penetration while minimizing the peripheral area, as the removed organic layer regions are much smaller than the openings required in the alternative approach.
3Productivity
If circuit structures are densely arranged in the peripheral area, then device integration is higher, but residual gases from manufacturing can more easily penetrate and damage pixel structures
Solution Approach 1:
The patent segments the peripheral area into multiple isolated circuit areas, creating physical barriers that prevent residual gases from traveling between circuit areas and reaching pixel structures. This allows high-density circuit integration within each isolated area while eliminating the harmful penetration effect through strategic organic layer removal between areas.
Solution Approach 2:
The patent uses the organic layer removal pattern as an intermediary mechanism to block residual gas pathways. By removing organic layers in specific regions between circuit areas, it creates a barrier that mediates between the circuit structures and pixel structures, preventing harmful gas penetration while allowing continuous organic layer deposition during manufacturing in the isolated circuit areas.
Data Source
AI summary
An organic light emitting diode display device includes a substrate, a pixel structure, a first circuit transistor, a first lower electrode, a first upper electrode, and a planarization layer. The substrate has a display area and a peripheral area including a first circuit area, a second circuit area, and a blocking area positioned between the first and second circuit areas. The pixel structure is in the display area on the substrate. The first circuit transistor is in the first circuit area on the substrate. The first lower electrode is in the blocking area on the substrate. The first upper electrode is on the first lower electrode, and the first upper electrode and the first lower electrode constitute a first capacitor. The planarization layer is on the substrate, and has a first opening that overlaps the first capacitor in the blocking area.