OLED Micro-Cavity Wavy Fluctuation Wide View Angle
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Solution Overview
Problem
Current OLED full color displays face challenges in achieving wide view angle due to directional luminous intensity and color characteristics, which limit their applicability.
Innovation Solution
The OLED structure features a micro-cavity with wavy fluctuations on the over coat layer, comprising an emitting layer, buffer layer, electrode layer, and transflective layer, with varying thicknesses for different colors to adjust cavity lengths as integral multiples of light wavelengths, eliminating directionality issues and enabling full color and wide view angle display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat firm structure micro-cavity is used, then the manufacturing process is simple, but the luminous intensity and color have strong directionality which makes against wide view angle display
Solution Approach 1:
The patent applies curvature by transforming the flat micro-cavity structure into a wavy structure. The wavy over-coat layer creates corresponding wavy fluctuations in the emitting layer, buffer layer, electrode layer, and transflective layer, replacing the flat geometry with a curved, undulating surface that eliminates directional luminosity while maintaining manufacturing feasibility through existing deposition techniques
2Adaptability or versatility
If the micro-cavity structure is modified to achieve wide view angle, then the view angle improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent segments the micro-cavity structure into multiple distinct layers (over-coat layer, emitting layer, buffer layer, electrode layer, transflective layer), where each layer independently exhibits wavy fluctuations. This segmentation allows the complex wavy structure to be manufactured through sequential deposition processes, making the complexity manageable while achieving the wide view angle effect
3Adaptability or versatility
If buffer layer thickness is varied for different colors, then full color display is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by varying the buffer layer thickness specifically at different locations corresponding to different color sub-pixels (R, G, B). Each region has a locally optimized thickness to achieve the desired cavity length for its specific color, allowing full color display while managing manufacturing precision through localized rather than global thickness control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively eliminates directionality issues in luminous intensity and color, achieving wide view angle and full color display capabilities while simplifying the manufacturing process for large-scale production.
Implementation Method 1
the micro-cavity appears a wavy fluctuation in accordance with the upper surface of the over coat layer to eliminate directionality issues of luminous intensity and color for realizing wide view angle display
Implementation Method 2
By using the effect of micro-cavity, the lights of some specific wavelengths can be enhanced and other lights get weaken
Data Source
AI summary
Disclosed are an OLED structure and a manufacture method thereof. The OLED structure includes: a substrate, an over coat layer on the substrate and a micro-cavity on the over coat layer; an upper surface of the over coat layer away from the substrate appears a wavy fluctuation having raised peaks and depressed troughs smoothly joined with the raised peaks, and the micro-cavity appears a wavy fluctuation in accordance with the upper surface of the over coat layer to eliminate directionality issues of luminous intensity and color for realizing wide view angle display.