OLED Dispersion Layer for Sunlight Reflection and Contrast
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Solution Overview
Problem
OLED displays face challenges in luminous efficiency and contrast due to strong sunlight reflection, with polarizers absorbing a significant amount of light, making it difficult to enhance their performance, especially in outdoor use.
Innovation Solution
A display panel structure is introduced with a substrate, display units, a thin film encapsulation layer, a dispersion layer with alternating regions of different refractive indices, a color filter substrate, and a cover plate, where the dispersion layer includes dispersion and non-dispersion areas to absorb external light through shielding layers on the color filter substrate, improving light transmission and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarizer is attached to the top of the screen to reduce sunlight reflection and improve contrast, then contrast is improved, but luminous efficiency deteriorates due to light absorption
Solution Approach 1:
The patent divides the encapsulation structure into multiple functional layers: thin film encapsulation layer, dispersion layer, and color filter substrate. The dispersion layer is further segmented into dispersion areas and non-dispersion areas, each performing specific functions to manage light differently and eliminate the need for a top polarizer.
Solution Approach 2:
The patent converts the harmful effect of sunlight reflection into a beneficial function by using the dispersion layer to redirect external light into the display unit, where it is absorbed by the organic light-emitting layer to generate additional light, thereby improving display brightness and contrast without sacrificing luminous efficiency.
2Illumination intensity
If a polarizer is attached to the top of the screen to reduce sunlight reflection, then contrast is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of encapsulation, light dispersion, color filtering, and reflection management into a single integrated structure. The dispersion layer is integrated between the thin film encapsulation layer and the color filter substrate, combining multiple functions that would otherwise require separate components.
Solution Approach 2:
The dispersion layer serves multiple functions simultaneously: it acts as part of the encapsulation structure, disperses external light to improve contrast, and works with the color filter substrate to manage both internal and external light paths, eliminating the need for a dedicated top polarizer.
3Manufacturing precision
If high-resolution OLED displays are produced to meet increasing resolution requirements, then display quality is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent segments the display structure into modular components (substrate, display units, thin film encapsulation layer, dispersion layer, color filter substrate, cover plate) that can be manufactured and assembled separately, facilitating high-resolution production through standardized processes.
Solution Approach 2:
The patent utilizes controlled variations in refractive index within the dispersion layer to achieve precise light management effects, enabling high-resolution display performance through material parameter optimization rather than complex manufacturing 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 solution enhances the luminous efficiency and contrast of OLED displays by effectively absorbing external light through the dispersion layer, reducing light loss and improving overall display performance.
Implementation Method 1
the dispersion layer includes a plurality of dispersion areas and a plurality of non-dispersion areas, and the dispersion areas and the non-dispersion areas are arranged alternately... a refractive index of the first dispersion region, a refractive index of the second dispersion region and a refractive index of the third dispersion region are different from each other
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate, display units, a thin film encapsulation layer, a dispersion layer, a color filter substrate, and a cover plate, wherein the dispersion layer includes dispersion areas and non-dispersion areas, and the dispersion areas consist of several regions of different refractive index.