Transparent OLED Transmissive Hole Light Blocking
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Solution Overview
Problem
Current transparent OLED displays suffer from reduced transmittance due to external light scattering in the transmissive area, which deteriorates the transparency and sharpness of the display.
Innovation Solution
A transparent OLED display design that includes a substrate with a display area and a transmissive area, featuring an insulating layer and a pixel definition layer with a light blocking material, such as a black coloring agent, covering the inner circumferential surface of transmissive holes to prevent external light scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmissive area is formed in the OLED display to allow external light transmission, then transparency is improved, but external light scattering occurs which deteriorates transmittance quality
Solution Approach 1:
The patent applies local quality by forming a pixel definition layer with light blocking material specifically on the inner circumferential surface of the transmissive hole, while keeping other areas transparent. This localized application of light blocking material prevents scattering only where needed (at the hole boundaries) without affecting the overall transparency of the transmissive area
Solution Approach 2:
The pixel definition layer acts as an intermediary element between the incoming external light and the transmissive hole. The light blocking material in this layer intercepts and blocks stray light before it can scatter within the hole, thereby mediating the interaction between external light and the transmissive structure to prevent quality deterioration
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 increases the transparency and sharpness of the transparent display by preventing external light scattering, thereby enhancing the overall performance of the OLED display.
Implementation Method 1
a pixel definition layer formed on the substrate and defining a pixel area within the display area. The pixel definition layer covers an inner circumferential surface of a transmissive hole formed in the insulating layer
Data Source
AI summary
An organic light emitting diode (OLED) display according to an exemplary embodiment includes: a substrate including a display area for displaying an image and a transmissive area around the display area; an insulating layer formed on the transmissive area of the substrate; and a pixel definition layer formed on the substrate and defining a pixel area within the display area. The pixel definition layer may cover an inner circumferential surface of a transmissive hole formed in the insulating layer.