Composite Optical Film Layout for Short-Pitch Display Pixels
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Solution Overview
Problem
Existing display devices face limitations in minimizing the distance between optical film layers and light emitting elements, leading to suboptimal optical properties and increased complexity in manufacturing, which affects image quality and flexibility.
Innovation Solution
A display device design that incorporates a thin optical film layer with a filler, such as Zr, Si, Ti, or Zn oxides, and a black dye encapsulation layer, positioned between light emitting elements to minimize distance and improve optical characteristics, while reducing the number of layers and preventing whitening phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick encapsulation layer with black color is formed on the optical film layer, then the protective function and black color sense are improved, but the whitening phenomenon caused by filler increases and the structure becomes more complex
Solution Approach 1:
The patent changes the optical parameters of the encapsulation layer by incorporating a black dye that absorbs light across the visible spectrum. This parameter change allows the encapsulation layer to provide both protection and black color sense while preventing the whitening phenomenon that occurs with traditional thick filler-based layers.
Solution Approach 2:
The patent creates a composite encapsulation layer by combining the filler material with a black dye. This composite structure maintains the protective and optical scattering functions of the filler while the black dye prevents light reflection and whitening, achieving multiple functions in a single layer.
2Reliability
If multiple optical functional layers (black dye layer, anti-reflection layer, Anti-Finger layer) are formed on the base film, then the optical functions are improved, but the structure becomes more complex and the number of fabricating processes increases
Solution Approach 1:
The patent merges multiple optical functional layers into a single encapsulation layer by incorporating the black dye directly into the encapsulation layer material. This consolidation eliminates the need for separate black dye layer, anti-reflection layer, and Anti-Finger layer, simplifying both the structure and the fabricating process while maintaining all necessary optical functions.
Solution Approach 2:
The encapsulation layer is designed to perform multiple functions simultaneously: it provides mechanical protection, optical scattering through filler, black color sense through the embedded black dye, and anti-reflection properties. This multi-functionality eliminates the need for multiple specialized layers, reducing structural complexity.
3Ease of manufacture
If the optical film layer is positioned farther from the light emitting elements, then the manufacturing process is simplified, but the optical properties and image quality deteriorate
Solution Approach 1:
The patent optimizes the thickness parameter of the optical film layer to achieve the ideal balance between manufacturing ease and optical performance. By carefully controlling the film thickness, the patent ensures sufficient optical interaction with light emitting elements while maintaining manufacturability.
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 enhances light scattering, reduces image quality deterioration, and simplifies the manufacturing process by minimizing the distance between optical film layers and light emitting elements, resulting in improved optical performance and flexibility.
Implementation Method 1
A display device and fabricating method thereof, which provide excellent optical characteristics while forming a small number of layers
Implementation Method 2
The encapsulation layer may include a black dye
Data Source
AI summary
The present disclosure is applicable to a display device related technical field and relates to a display device using a composite optical film and a light emitting element for example. The present disclosure may include a wiring substrate, an electrode pad partitioned on the wiring substrate, a multitude of light emitting elements forming a unit pixel by being connected to the electrode pad, an optical film layer forming a film on a multitude of the light emitting elements and including a filler, and an encapsulation layer positioned on the optical film layer.