OLED Anode Active Layer Extension for Opening Ratio
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Solution Overview
Problem
Existing organic light emitting display devices face complexity in process and space arrangement, which hinders the achievement of high luminance and high resolution, particularly in simplifying the integration of active layers and signal lines.
Innovation Solution
The active layers in the circuit area are extended to the emission area to serve as the anode electrode, and the active layers are disposed on the same layer as the signal lines, while a bank is used to expose the side surface of the anode electrode, improving the opening ratio by simplifying the process and enhancing the display panel's efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If active layers and signal lines are implemented as separate structures, then the device functionality is ensured, but the process complexity and space arrangement become complicated
Solution Approach 1:
The active layer is extended from the circuit area into the emission area to serve dual functions: as the active layer in the circuit area and as the anode electrode in the emission area. This merging of structures eliminates the need for separate anode electrode fabrication, thereby simplifying the manufacturing process while maintaining device functionality.
Solution Approach 2:
The active layer is designed to perform multiple functions: it acts as the active layer for transistor operation in the circuit area and simultaneously serves as the anode electrode for light emission in the emission area. This multi-functionality reduces the number of separate components and process steps required.
2Area of stationary object
If traditional separate structures are used for active layers and anode electrodes, then manufacturing is straightforward, but the opening ratio is reduced
Solution Approach 1:
The active layer is extended in the spatial dimension from the circuit area into the emission area, allowing it to function as both the active layer and anode electrode. This dimensional extension enables the active layer to reach the emission area directly, increasing the opening ratio without requiring additional complex structures.
3Productivity
If multiple separate layers are used for active layers and electrodes, then functional separation is achieved, but the number of process steps increases
Solution Approach 1:
The active layer and anode electrode are merged into a single continuous structure. The active layer is extended from the circuit area into the emission area, eliminating the need for a separate anode electrode layer and reducing the total number of fabrication steps.
Solution Approach 2:
The active layer is designed to perform multiple functions: it acts as the active layer for transistor operation in the circuit area and simultaneously serves as the anode electrode for light emission in the emission area. This multi-functionality reduces the number of separate components and process steps required.
Data Source
AI summary
The present disclosure relates to an organic light emitting display device and an organic light emitting display panel including color filters disposed on a substrate and overlapping an emission area, a first insulating layer disposed on the color filters, a first active layer disposed on the first insulating layer, a gate electrode disposed on an upper surface of the first active layer, a second insulating layer disposed on the first active layer and the gate electrode and comprising a hole exposing a portion of the upper surface of the first active layer, a bank disposed on the second insulating layer and comprising an opening overlapping the hole of the second insulating layer, an organic layer disposed on the portion of the upper surface of the first active layer and the bank, and a cathode electrode disposed on the organic layer, thereby providing the organic light emitting display device and the organic light emitting display panel that are capable of simplifying the process.