OLED Optical Film Openings for Non-Planar Light Condensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional OLED display devices with varied shape light condensing structures in non-planar areas experience stress concentration, leading to structural failure and cracks due to their edges and corners.
Innovation Solution
A display device design featuring a substrate with a light-emitting layer and optical film layers where the first optical film layer has a refractive index less than the second, with strategically positioned openings and symmetrical shapes to reduce stress and prevent complete coverage of subpixels, thereby alleviating stress concentration and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light condensing structures with edges and corners are used to improve light condensing efficiency, then light-emitting intensity is improved, but stress concentration occurs causing the structures to fall off and cracks to form
Solution Approach 1:
The patent applies curvature by replacing the conventional light condensing structure with a lens-shaped structure that has a curved surface facing the light-emitting unit. This curved surface eliminates edges and corners, preventing stress concentration while maintaining light condensing efficiency through its lens geometry that focuses light effectively.
2Adaptability or versatility
If light condensing structures are made with varied shapes in non-planar display areas to fit the display geometry, then display adaptability is improved, but stress concentration increases causing structures to fall off
Solution Approach 1:
The patent applies local quality by configuring the light condensing structure with different shapes for different display areas: a first light condensing structure for the planar display area and a second light condensing structure for the non-planar display area. Each structure is locally optimized for its specific area while both use curved surfaces to eliminate stress concentration points.
3Ease of manufacture
If conventional light condensing structures with edges and corners are used, then manufacturing is simplified, but stress concentration causes the structures to crack and detach
Solution Approach 1:
The patent applies curvature by designing the light condensing structure with a curved surface that eliminates edges and corners. This curved geometry inherently prevents stress concentration points where cracks would initiate, significantly improving crack resistance and structural strength while remaining manufacturable through standard molding processes.
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
The design improves user experience by reducing light condensing effects in non-planar areas, preventing film layer detachment and cracks, and enhancing the durability of OLED display devices.
Implementation Method 1
The first optical film layer has a refractive index less than a refractive index of the second optical film layer
Data Source
AI summary
A display device is provided. A boundary of a projection of a first opening on a substrate is located between an inscribed circle and a circumscribed circle of a boundary of a projection of a corresponding subpixel on the substrate, so that the first opening cannot completely cover the corresponding subpixel. In this way, a light condensing effect in a non-planar display area is reduced, a bad experience with certain viewing angles in conventional non-planar display areas for users is improved, and user experience is enhanced.