Color Conversion Panel Curved Pixel Luminance
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Solution Overview
Problem
Conventional color conversion panels suffer from low front luminance, inadequate luminance at a 30° viewing angle, and luminance non-uniformity, with external light reflection and limited viewing angle, which hinders display performance.
Innovation Solution
A color conversion panel design featuring a substrate with a color conversion layer comprising a color conversion barrier rib and pixel, where the pixel forms a curved depression or protrusion in the light incident direction, enhancing luminance and uniformity, and incorporating a color filter layer with a similar structure to reduce external light reflection and increase the viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional color conversion panel with flat surfaces is used, then the structure is simple, but the front luminance is low (less than 250 lux)
Solution Approach 1:
The patent applies curvature by forming the color conversion pixel surface as a curved surface rather than a flat surface. This curved surface configuration increases the front luminance to 250 lux or more by improving light extraction efficiency and directing more light toward the viewer, while maintaining a relatively simple overall panel structure.
2Illumination intensity
If a conventional color conversion panel with flat surfaces is used, then the manufacturing process is simple, but the luminance uniformity is poor (deviation close to 20%)
Solution Approach 1:
The curved surface of the color conversion pixel is designed with specific curvature parameters (R1 and R2 radii) to optimize light distribution. This curvature configuration reduces luminance deviation between different viewing angles from close to 20% to 15% or less, improving luminance uniformity while keeping the manufacturing process feasible through standard photolithography and etching techniques.
3Adaptability or versatility
If a conventional color conversion panel is used, then the viewing angle is limited, but the structure is simple
Solution Approach 1:
The curved surface configuration of the color conversion pixel inherently expands the viewing angle by distributing light more evenly across different viewing angles. This achieves a viewing angle of 80° or more without requiring complex additional optical elements such as microlens arrays or prism sheets, thus maintaining relatively simple panel structure.
Solution Approach 2:
The patent introduces surface curvature as an additional dimensional feature to the otherwise planar panel structure. By modifying the z-dimension (surface profile) rather than adding complex lateral structures, the viewing angle is expanded while keeping the overall device complexity manageable.
4Object-affected harmful factors
If external light reflection is not suppressed, then the display is brighter, but the viewing quality is degraded
Solution Approach 1:
The curved surface of the color conversion pixel reduces external light reflection by causing reflected light to scatter in multiple directions rather than reflecting uniformly. This curvature design suppresses the intensity of reflected external light while maintaining the forward emission of display light, thus improving viewing quality without significantly compromising display brightness.
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 significantly improves front luminance, luminance uniformity, and viewing angle, while reducing external light reflection and increasing the aperture ratio, thereby enhancing display performance.
Implementation Method 1
The color conversion pixel 220 converts the blue light incident on the pixel into red light or green light, or maintains it as blue light to emit
Implementation Method 2
the color conversion pixel 220 may form a curved depression or a curved protrusion in a light incident direction
Implementation Method 3
The color conversion panel can suppress the external light reflection
Data Source
AI summary
A color conversion panel includes a substrate, and a color conversion layer formed on the substrate. The color conversion layer includes a color conversion barrier rib that spatially separates a space on the substrate in pixel units, and a color conversion pixel inserted into the separated space of the color conversion barrier rib on the substrate and having a curved depression or a curved protrusion in a light incident direction or a curved protrusion in a light emission direction.