Inclined Anode Electrode for OLED Viewing Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional organic EL display devices face challenges in freely setting the inclination angle of anode electrodes with respect to the substrate surface, which affects the viewing angle characteristics, particularly at the pixel region's edge portions due to the flattened structure up to the anode electrode.
Innovation Solution
The display device incorporates a pixel region with an anode electrode inclined with respect to the substrate surface, where the electrode's inclination angle is determined by the surface shape of a base insulating layer, allowing for arbitrary inclination angles to be set, and the anode electrode is formed on a stepped or smoothed base insulating layer to enhance viewing angle characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the anode electrode is formed on a flattened base insulating layer, then the manufacturing process is simple, but the viewing angle characteristic deteriorates due to weak light collection at edge portions
Solution Approach 1:
The base insulating layer is formed with a predetermined inclined surface before the anode electrode is deposited. This preliminary shaping of the base insulating layer enables the anode electrode to automatically inherit the inclination, improving light collection at edge portions without adding complex post-processing steps for electrode inclination.
Solution Approach 2:
The invention transitions from a two-dimensional flattened structure to a three-dimensional inclined structure by forming the base insulating layer with an inclined surface. This dimensional change allows the anode electrode to be inclined relative to the substrate surface, optimizing light extraction in the vertical dimension while maintaining manufacturing simplicity.
2Reliability
If a specific structure is formed for each pixel to incline the anode electrode, then the viewing angle characteristic improves, but the device complexity increases and arbitrary inclination angles cannot be freely set
Solution Approach 1:
The base insulating layer serves multiple functions: it provides electrical insulation, structural support, and inclination geometry for the anode electrode. By integrating the inclination function into the base insulating layer rather than requiring separate pixel-specific structures, the invention reduces device complexity while enabling arbitrary inclination angles through straightforward layer formation processes.
Solution Approach 2:
The invention enables easy adjustment of the inclination angle by changing the formation parameters of the base insulating layer (such as deposition angle, thickness gradient, or etch profile) rather than modifying complex pixel structures. This parameter-based control allows arbitrary inclination angles to be set freely while maintaining manufacturing simplicity and reducing device complexity.
Data Source
AI summary
A display device of the present disclosure includes a pixel region including a pixel including a light emitting unit arranged on a substrate, and, in the pixel region, an anode electrode of the light emitting unit is provided with a region including a pixel inclined with respect to a substrate surface. Then, an electrode surface of the anode electrode has an inclination angle according to a surface shape of a base insulating layer. An electronic device of the present disclosure includes the display device having the configuration described above.