Reflective Electrode with Uneven Insulation for Display Light Diffusion
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Solution Overview
Problem
Existing display devices, such as LCDs and electrowetting displays, face challenges in enhancing reflectance and visibility while simplifying the manufacturing process, particularly in creating a structure that effectively diffuses and reflects light without using additional diffusion films or complex masking techniques.
Innovation Solution
A display device is designed with a plurality of pixels featuring a first substrate with an organic insulation layer and an inorganic insulation layer, both having uneven surfaces, and a reflective electrode formed on the inorganic insulation layer, which diffuses and reflects incident light without the need for additional diffusion films or complex masking, thereby increasing reflectance and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate diffusion film is added to enhance light diffusion and reflectance, then visibility is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines the diffusion function and reflective electrode function into a single integrated layer structure. The uneven surface structure serves both to diffuse light and to provide a substrate for the reflective electrode, eliminating the need for a separate diffusion film and simplifying the overall device structure while maintaining enhanced reflectance and visibility.
Solution Approach 2:
The uneven surface structure of the insulation layer performs multiple functions simultaneously: it acts as a light diffusion element, provides structural support for the reflective electrode, and creates optical path variations. This multi-functional design replaces what would traditionally require multiple separate components, reducing device complexity while improving illumination properties.
2Illumination intensity
If additional diffusion films are used to improve light diffusion, then reflectance increases, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the diffusion function into the insulation layer structure itself, which is already present in the device architecture. By creating an uneven surface on the existing insulation layer and forming the reflective electrode directly on this structure, the manufacturing process avoids the need to fabricate and assemble a separate diffusion film, thereby simplifying production while achieving enhanced reflectance.
3Illumination intensity
If complex masking techniques are employed to create uneven structures, then light diffusion is improved, but productivity decreases
Solution Approach 1:
The uneven surface structure is formed through a self-organizing process during the formation of the insulation layer or through simple surface treatment techniques. This self-forming mechanism eliminates the need for complex masking steps and multiple processing stages, allowing the light diffusion function to be achieved while maintaining high production efficiency and throughput.
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 reflectance and visibility by diffusing and reflecting light effectively within the display device, while simplifying the manufacturing process by eliminating the need for separate masks to create the uneven structure, thus improving both performance and production efficiency.
Implementation Method 1
a reflective electrode configured to reflect incident light
Implementation Method 2
diffuses and reflects incident light
Data Source
AI summary
Pixels of a display device include a first substrate, an organic insulation layer disposed on the first substrate and having an upper surface formed in an uneven structure, an inorganic insulation layer disposed on the organic insulation layer and formed in the uneven structure, a first electrode disposed on the inorganic insulation layer and formed in the uneven structure, and a device to provide a data voltage to the first electrode, in which the first electrode includes a reflective electrode to reflect incident light.