OLED Display Protrusion Patterns for Moiré Reduction
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Solution Overview
Problem
Organic light emitting diode (OLED) displays suffer from luminance deterioration and moiré and sparkling phenomena, particularly at curved viewing angles, which degrade image quality.
Innovation Solution
A display device configuration featuring a resin layer with a first protrusion and a window with a second protrusion, where the protrusions have specific shapes and sizes, and refractive indexes differ between the resin layer and the window, along with scattered particles, to refract and scatter light uniformly, preventing moiré and sparkling and enhancing viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a window with protrusions is used to improve luminance uniformity in the front direction, then front luminance is improved, but luminance uniformity in the curved inclination direction deteriorates causing moiré and sparkling
Solution Approach 1:
The patent applies local quality by creating different protrusion patterns in different regions of the window. The window is divided into a first region (front viewing area) and a second region (curved inclination area), with each region having protrusions of different sizes, shapes, or densities optimized for its specific viewing angle requirements.
Solution Approach 2:
The window structure is segmented into multiple functional regions with distinct protrusion characteristics. This segmentation allows independent optimization of each region for its specific viewing direction, preventing the moiré and sparkling effects that occur in uniformly structured windows.
2Adaptability or versatility
If the viewing angle is increased, then the curved inclination direction performance is improved, but moiré and sparkling phenomena occur due to poor luminance uniformity
Solution Approach 1:
Different regions of the window are given different local properties through varied protrusion patterns. The first region optimizes for front viewing while the second region specifically addresses curved inclination viewing, allowing wide viewing angles without moiré or sparkling in either direction.
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 solution effectively reduces luminance deterioration and moiré patterns, maintaining uniform luminance and improving the viewing angle by minimizing light distortion and double refraction.
Implementation Method 1
The resin layer, the first window, and the second window may include a first area for displaying an image, a second area that is curved and around the first area... A cross-section of the first style may be generally triangular, and a cross-section of the second style may be generally semi-circular... Refractive indexes of the resin layer and the first window may be different from each other.
Implementation Method 2
The resin layer may further include scattered particles... when the display device including a window with protrusions and depressions is formed, the moiré and sparkling phenomena are prevented or substantially prevented (e.g., reduced) and the luminance deterioration is controlled or reduced
Data Source
AI summary
A display device includes: a display panel; a resin layer on the display panel and having a first protrusion having a first style on a surface thereof; a first window on the resin layer and having a second protrusion having a second style on a surface thereof; and a second window on the first window.