Anti-Reflective Coating for Plastic Substrate Displays
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Solution Overview
Problem
Electrophoretic displays using external light result in darker images compared to displays with separate light sources due to light reflection issues.
Innovation Solution
A display apparatus with a coating layer formed from a mixture of an acryl-based monomer and a silicon derivative on a plastic substrate to prevent light reflection, enhancing the utilization of external light and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a plastic substrate is used in electrophoretic display, then flexibility and manufacturing ease are improved, but light reflection from the substrate reduces display brightness
Solution Approach 1:
An anti-reflection coating layer is introduced as an intermediary between the external light source and the plastic substrate. This coating layer mediates the interaction by reducing light reflection at the substrate surface, allowing more light to penetrate through to illuminate the electrophoretic particles effectively while maintaining the plastic substrate's manufacturing advantages.
Solution Approach 2:
The refractive index parameter of the substrate surface is modified by applying a coating layer with specific refractive index properties. This parameter change reduces the refractive index mismatch between air and plastic substrate, thereby minimizing light reflection and improving light transmission for display brightness.
2Use of energy by moving object
If external light is used for display, then energy consumption is reduced, but reflected light decreases effective illumination and display quality
Solution Approach 1:
The harmful light reflection phenomenon is converted into a beneficial effect by designing the anti-reflection coating with specific optical properties. The coating that would normally reflect light is instead engineered to transmit light effectively, transforming the reflection issue into an opportunity to control and optimize light transmission for improved display quality.
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 significantly increases the brightness and display quality of electrophoretic displays by efficiently using external light, as demonstrated by improved reflectivity and reduced light reflection.
Implementation Method 1
a coating layer formed on at least one surface of the first substrate to prevent reflection from the first substrate of light applied to the first substrate
Data Source
AI summary
A display apparatus according to an embodiment includes a first substrate including a plastic material, a second substrate facing the first substrate, and a coating layer formed on at least one surface of the first substrate. The coating layer includes a first compound having an acryl-based monomer and a second compound having a silicon derivative, and prevents reflection of light from the first substrate when light is provided to the first substrate. Thus, the display apparatus may have enhanced lightness (brightness) thereby improving the display quality.