Display Panel Light Adjustment Layer for Blue Viewing-Angle Color Cast
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Solution Overview
Problem
Existing display panels suffer from significant luminance decay of blue light at large viewing angles due to the micro-cavity effect, leading to severe color cast issues, while red and green light luminance remains relatively stable.
Innovation Solution
Incorporating a color filter substrate with a light adjustment layer containing dye molecules and hollow particles, along with a color conversion layer and light-emitting devices, to enhance color uniformity and reduce luminance decay across different viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional display panel structure is used, then red and green light luminance remains stable, but blue light suffers from significant luminance decay at large viewing angles due to the micro-cavity effect
Solution Approach 1:
The patent introduces a light adjustment layer as an intermediary component between the color conversion layer and the color filter layer. This layer contains blue dye molecules and hollow particles that work together to compensate for the micro-cavity effect specifically affecting blue light, thereby improving blue light luminance stability at large viewing angles without affecting the overall display performance
Solution Approach 2:
The patent modifies the optical parameters of the display panel by incorporating a light adjustment layer with specific optical properties. The layer contains blue dye molecules with specific absorption characteristics and hollow particles with controlled size distribution (average diameter 10-200 nm), which together alter the optical path and compensate for the micro-cavity effect in the blue wavelength range
2Stability of the object's composition
If a light adjustment layer with dye molecules and hollow particles is added, then color uniformity and luminance stability are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functional components into a single integrated light adjustment layer. The blue dye molecules and hollow particles are incorporated together in the same layer, which is positioned between the color conversion layer and the color filter layer. This merging approach achieves color uniformity improvement while minimizing the increase in device complexity by consolidating multiple functions into one layer rather than adding separate components
Solution Approach 2:
The light adjustment layer serves multiple functions simultaneously: it contains blue dye molecules that absorb excess blue light to compensate for micro-cavity effect, incorporates hollow particles that scatter and diffuse light to improve viewing angle performance, and maintains compatibility with the existing color filter and color conversion layers. This multi-functionality reduces the need for additional separate components
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 effectively maintains consistent luminance and color accuracy across various viewing angles by utilizing the light adjustment layer and color conversion layer to manage light transmission and conversion, addressing the micro-cavity effect and enhancing display performance.
Implementation Method 1
The color conversion layer includes first color conversion patterns, second color conversion patterns and light-transmitting patterns. The first color conversion patterns are located in the first sub-pixels respectively. The second color conversion patterns are located in the second sub-pixels respectively.
Implementation Method 2
The light adjustment layer includes first particles and second particles. The first particles include dye molecules.
Implementation Method 3
The second particles have a hollow structure. An orthographic projection of the light adjustment layer on the first base substrate at least overlaps with the third light-transmitting regions.
Data Source
AI summary
A display panel includes a first base substrate, a light-emitting device layer located on a side of the first base substrate, a color filter layer located on a side of the light-emitting device layer away from the first base substrate, a color conversion layer located between the light-emitting device layer and the color filter layer, a touch function layer located on a side of the color conversion layer away from the first base substrate and a light adjustment layer located on a side of the touch function layer away from the first base substrate. The light adjustment layer includes first particles and second particles. The first particles each include dye molecules. The second particles each have a hollow structure.