Fresnel Lens Layer for OLED Display Brightness and Viewing Angle
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Solution Overview
Problem
Current OLED display devices face challenges in achieving uniform light distribution and high brightness across a wide viewing angle range, as light emitted by pixel units is not effectively converged or diverged.
Innovation Solution
Incorporating a Fresnel lens layer with Fresnel lenses on a display substrate, where each pixel unit is positioned within the focal plane of the lenses, allowing for the convergence or divergence of light, thereby enhancing brightness and even light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emitted by pixel units is allowed to spread naturally, then the display structure remains simple, but light distribution is uneven and brightness is reduced
Solution Approach 1:
A Fresnel lens layer is introduced as an intermediary component between the pixel layer and the viewer. This lens layer refracts and redirects light from the pixel units, achieving uniform light distribution and high brightness without requiring complex structural modifications to the OLED display itself.
Solution Approach 2:
The patent utilizes the optical dimension by introducing a Fresnel lens layer that manipulates light propagation in three-dimensional space. The lens layer creates multiple light paths and refraction angles, transforming the two-dimensional light emission from pixel units into three-dimensional converged or diverged light distribution.
2Adaptability or versatility
If conventional display structures are used, then manufacturing is simple, but viewing angle range is limited and visual consistency deteriorates
Solution Approach 1:
The Fresnel lens layer serves as an intermediary that decouples the viewing angle expansion function from the pixel structure. By placing the lens layer separately, the patent achieves wide viewing angles without requiring precise alignment between pixel units and viewing directions, thus reducing manufacturing precision requirements.
Solution Approach 2:
The patent changes the optical parameters of the display system by introducing a Fresnel lens layer with specific refractive indices and lens configurations. This allows the system to achieve wide viewing angles and consistent visual quality across different viewing conditions without modifying the fundamental pixel structure.
3Illumination intensity
If light is converged to increase brightness, then brightness is improved, but light distribution uniformity deteriorates
Solution Approach 1:
The Fresnel lens layer dynamically adapts light distribution based on viewing conditions. By designing the lens with multiple focal points and varying curvature, the system can converge light for brightness enhancement in certain directions while diverging light in other directions to maintain uniformity, creating a dynamic balance between brightness and uniformity.
Solution Approach 2:
Different regions of the Fresnel lens layer are designed with different optical properties. The lens structure includes concentric circles with varying curvature radii, allowing different zones to perform different functions - some zones converge light for brightness while other zones diverge light for uniformity, achieving local optimization of light distribution.
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 enables high-brightness displays with consistent visual quality across a broader viewing angle, as light from each pixel unit is transformed into converged or diverged light, ensuring uniform illumination and improved visual experience.
Implementation Method 1
a Fresnel lens layer including a plurality of Fresnel lenses; and the pixel units each are located at a position within a focal plane of at least one of the Fresnel lenses
Implementation Method 2
a Fresnel lens layer including a plurality of Fresnel lenses
Data Source
AI summary
The present disclosure provides a display substrate and a method of manufacturing the same, and a display device. The display substrate comprises a base substrate and a pixel layer disposed on the base substrate, the pixel layer comprising a plurality of pixel units distributed in a matrix array. The display substrate further comprises a Fresnel lens layer including a plurality of Fresnel lenses. The pixel units each are located at a position within a focal plane of at least one of the Fresnel lenses.