Prism Optical Layer for Smoother OLED Viewing Brightness
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Solution Overview
Problem
OLED display panels exhibit brightness fluctuations at different viewing angles due to uncertain recombination positions of excitons in the light-emitting layer, affecting user experience.
Innovation Solution
A display panel design incorporating an optical layer with prisms that refract light emitted from the light-emitting substrate, featuring inclined side surfaces and optimized arrangements to disperse light and smooth out brightness variations across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the recombination position of excitons in the light-emitting layer is uncertain due to manufacturing tolerances, then the manufacturing process is simple, but the viewing brightness change curve becomes non-smooth with brightness fluctuations at different viewing angles
Solution Approach 1:
The patent introduces a microlens array layer as an intermediary component between the light-emitting layer and the viewer. This microlens array acts as a mediator that optically corrects the light emission pattern, concentrating and directing the light to achieve a smooth viewing brightness change curve. The microlens array compensates for the uncertain recombination positions of excitons without requiring changes to the light-emitting layer's manufacturing process, thus maintaining manufacturing simplicity while improving brightness uniformity.
2Manufacturing precision
If constituent materials of the light-emitting layer are replaced or a new transmission layer is added to restrict recombination position, then the recombination position accuracy is improved, but the number of manufacturing processes increases and luminous efficiency decreases
Solution Approach 1:
The patent separates the function of controlling light emission into a distinct microlens array layer, independent from the light-emitting layer. This segmentation allows the light-emitting layer to maintain its simple structure and manufacturing process, while the microlens array layer handles the optical correction. By dividing the system into functional modules, the patent avoids increasing the complexity of the light-emitting layer's manufacturing processes while still achieving precise control over the observed brightness distribution.
3Manufacturing precision
If constituent materials of the light-emitting layer are replaced or a new transmission layer is added to restrict recombination position, then the recombination position accuracy is improved, but the luminous efficiency is reduced
Solution Approach 1:
The microlens array layer serves as an optical intermediary that redirects and concentrates light without absorbing significant energy. The microlenses are made of transparent materials with high light transmission efficiency, minimizing energy loss. This approach improves the observed brightness distribution by optically manipulating the emitted light rather than attempting to control the excitation process, thereby preserving the high luminous efficiency of the original light-emitting materials.
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 design achieves a smooth viewing brightness change curve at different angles, optimizing user experience by minimizing brightness fluctuations and enhancing luminous efficiency.
Implementation Method 1
The optical layer is disposed on the light-emitting surface of the light-emitting substrate and includes a prism to refract light emitted from the light-emitting substrate
Data Source
AI summary
A display panel includes a light-emitting substrate and an optical layer. The light-emitting substrate includes a light-emitting surface. The optical layer is disposed on the light-emitting surface of the light-emitting substrate and includes a prism to refract light emitted from the light-emitting substrate. The prism of the optical layer includes a bottom surface, a top surface, and a plurality of side surfaces connecting the bottom surface and the top surface. The bottom surface and the top surface are parallel to the light-emitting substrate. The bottom surface is arranged adjacent to the light-emitting substrate. The top surface is arranged away from the light-emitting substrate. An area of the top surface is smaller than an area of the bottom surface.