Display Panel Light Adjustment Layer for Wide-Angle Color Uniformity
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Solution Overview
Problem
Existing display panels face issues with significant luminance decay of blue light at varying angles due to the micro-cavity effect, leading to color cast at large viewing angles, particularly in OLED displays.
Innovation Solution
Incorporation of 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 OLED display panel is used, then the display structure is simple and manufacturing is easy, but significant luminance decay of blue light occurs at varying angles due to the micro-cavity effect, leading to color cast at large viewing angles
Solution Approach 1:
The display panel is divided into multiple functional layers: light-emitting device layer, color conversion layer, color filter layer, touch function layer, and light adjustment layer. Each layer performs a specific function in managing light transmission and conversion, allowing precise control over luminance and color characteristics at different viewing angles without requiring complete structural redesign.
Solution Approach 2:
The light adjustment layer acts as an intermediary between the light-emitting devices and the viewer, containing dye molecules and hollow particles that mediate the micro-cavity effect. This intermediary layer compensates for the inherent luminance decay by introducing optical elements that adjust the light path and intensity distribution, thereby maintaining color accuracy at large viewing angles.
2Use of energy by moving object
If the micro-cavity effect is utilized in OLED displays, then light extraction efficiency is improved, but luminance decay at varying angles increases, causing color cast at large viewing angles
Solution Approach 1:
The light adjustment layer is selectively positioned to address specific angular regions where color cast occurs. The dye molecules and hollow particles are distributed to provide localized compensation for the micro-cavity effect, maintaining high light extraction efficiency in the normal viewing direction while correcting luminance decay at oblique angles through targeted optical adjustment.
Solution Approach 2:
The light adjustment layer modifies the optical parameters of the display system by introducing materials with specific refractive indices and optical absorption characteristics. The dye molecules absorb certain wavelengths while the hollow particles scatter light, collectively changing the luminance and color parameters at different viewing angles to maintain color accuracy without sacrificing light extraction efficiency.
3Stability of the object's composition
If multiple functional layers are added to manage light transmission and conversion, then color uniformity and luminance consistency are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The light adjustment layer performs multiple functions simultaneously: it compensates for the micro-cavity effect, adjusts luminance distribution, and maintains color accuracy across different viewing angles. By consolidating these functions into a single integrated layer rather than requiring separate components, the design achieves improved color uniformity while limiting the increase in manufacturing complexity.
Solution Approach 2:
The light adjustment layer utilizes composite materials combining dye molecules and hollow particles within a matrix material. This composite structure allows the layer to achieve complex optical properties that would be difficult to obtain with single materials, enabling precise control over light transmission and conversion while maintaining a manageable layer thickness and structure for manufacturing purposes.
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 varying viewing angles by utilizing the light adjustment layer and color conversion layer to manage light transmission and conversion, improving display performance.
Implementation Method 1
the color conversion layer, which is located between the light-emitting device layer and the color filter layer and includes first color conversion patterns, second color conversion patterns and light-transmitting patterns
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
Implementation Method 4
The color filter layer is located on a side of the light-emitting device layer away from the first base substrate, and includes at least a first light-shielding pattern, first color filters and second color filters
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 filler 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.