Light Absorption Pattern Units for OLED Viewing Angle Improvement
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Solution Overview
Problem
Organic light emitting display devices face challenges with reduced viewing angles due to light emission from different regions mixing, which affects color purity and overall display performance.
Innovation Solution
Incorporating light absorption pattern units on non-light emitting regions and a black matrix on the sealing member to define organic light emitting regions, along with color filters on the sealing member, to prevent light mixing and enhance viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light absorption pattern units are added to define emitting regions, then viewing angles and color purity are improved, but device complexity increases
Solution Approach 1:
The patent divides the display device structure into distinct segments by introducing light absorption pattern units that separate light emitting regions from non-light emitting regions. This segmentation prevents light mixing between adjacent pixels, thereby improving color purity and viewing angles without requiring complete structural redesign.
Solution Approach 2:
The light absorption pattern units are strategically placed only in non-light emitting regions, creating local light absorption properties where needed. This localized approach improves color definition at pixel boundaries while maintaining the overall simplicity of the display structure and avoiding unnecessary complexity across the entire device.
2Reliability
If light absorption pattern units are incorporated, then light mixing between regions is reduced, but manufacturing complexity increases
Solution Approach 1:
The light absorption pattern units are integrated with existing display structure components rather than being added as completely separate elements. This merging approach allows the light absorption function to be combined with structural elements already present in the display device, simplifying the manufacturing process while still achieving the desired light isolation effect.
3Measurement precision
If black matrix and color filters are added on sealing member, then viewing angles are improved, but device complexity increases
Solution Approach 1:
The sealing member is given multiple functions by forming the black matrix and color filters on its surface. Instead of adding separate components for light absorption and color filtering, the sealing member itself performs these functions, thereby improving viewing angles and color purity without significantly increasing overall device complexity.
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 improves viewing angles and maintains color purity by reducing light leakage between organic light emitting regions, thereby enhancing the display's performance and color reproduction.
Implementation Method 1
one or more a light absorption pattern units formed on a plurality of non-light emitting regions of the display unit
Implementation Method 2
a black matrix formed on a surface of the sealing member to correspond to the non-light emitting region of the display unit
Implementation Method 3
The light is generated by a re-combination of electrons and holes in an organic emissive layer when a voltage is applied to an organic film containing the organic emission layer
Data Source
AI summary
An organic light emitting display device includes a substrate, a display unit that is formed on the substrate, and includes a plurality of organic light emitting regions that emit light, a sealing member disposed above the display unit, and one or more light absorption pattern units formed on a plurality of non-light emitting regions of the display unit.