OLED Display Condenser and Light Absorbing Pixel Defining Layer
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Solution Overview
Problem
OLED displays face deteriorated black color expression and contrast in bright environments due to external light reflection, which is partially mitigated by polarizing and phase delay plates but results in light loss.
Innovation Solution
Incorporating a pixel defining layer with a light absorbing material and condensers within concave lens containers on the sealing member, which focus external light onto the pixel defining layer for absorption rather than reflection, improving viewability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing plate and a phase delay plate are provided to suppress reflection of external light, then black color expression and contrast are improved, but light generated from the organic emission layer is lost
Solution Approach 1:
The patent converts the harmful effect of external light reflection into a beneficial effect by using condensers to focus external light onto light absorbers. The reflected light that would normally degrade display quality is instead directed to be absorbed, transforming the harmful reflection into a controlled light management mechanism that improves black color expression without sacrificing emission light
Solution Approach 2:
The patent introduces light absorbers as intermediary elements between the external light reflection path and the display structure. These light absorbers act as mediators that capture focused external light and prevent it from degrading the display quality, while the condensers serve as intermediary optical elements that redirect the light path from reflection to absorption
2Reliability
If metal wires and electrodes are used in OLED display, then electrical conductivity and device functionality are achieved, but external light reflection occurs
Solution Approach 1:
The patent applies local quality by placing light absorbers specifically at locations where external light reflection occurs (on metal wires and electrodes), rather than uniformly across the entire display. This localized approach maintains the electrical functionality of the metal components while selectively addressing the reflection problem only where it occurs
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 configuration effectively reduces external light reflection, enhancing the display's viewability and maintaining light emission efficiency by absorbing external light on the pixel defining layer with a light absorbing material.
Implementation Method 1
a condenser configured to focus external light onto a pixel defining layer
Implementation Method 2
condensers within concave lens containers on the sealing member, which focus external light onto the pixel defining layer
Implementation Method 3
absorbing external light on the pixel defining layer with a light absorbing material
Data Source
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AI summary
Exemplary embodiments of the present invention relate to an OLED display. The OLED display according to exemplary embodiments of the present invention includes: a substrate; a plurality of pixel electrodes on the substrate; a pixel defining layer on the substrate and having a plurality of openings exposing the plurality of pixel electrodes; a plurality of organic emission layers on corresponding pixel electrodes of the plurality of pixel electrodes; a sealing member including a plurality of concave lens containers and covering the plurality of organic emission layers and the pixel defining layer; and at least one condenser in the plurality of lens containers. The at least one condenser is configured to form a condensing area on the pixel defining layer for each of the plurality of lens containers.