Display Bank Openings with Localized Low-Refractive Layers to Reduce Cost
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Solution Overview
Problem
Existing display devices face challenges in achieving cost competitiveness due to the high usage of low refractive materials, which are costly.
Innovation Solution
Incorporating a low refractive layer in the opening of a bank to reduce the amount of low refractive material required, thereby enhancing cost competitiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low refractive material is applied extensively to achieve optimal optical performance, then light extraction efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies low refractive material selectively only in the opening region of the bank structure rather than uniformly across the entire pixel electrode surface. This localized application maintains optimal light extraction efficiency at the critical interface between the light-emitting element and the external environment, while significantly reducing the total quantity of expensive low refractive material required for manufacturing.
2Use of energy by moving object
If low refractive material is applied uniformly across the pixel electrode, then optical performance is maximized, but material consumption increases
Solution Approach 1:
The patent extracts the low refractive material application from the uniform full-surface coating approach and confines it specifically to the opening region of the bank. This extraction eliminates unnecessary material application in non-critical areas, thereby reducing material consumption while preserving the essential optical performance function where it is most needed.
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
This approach secures cost competitiveness by minimizing the use of expensive low refractive materials while maintaining the functionality of the display device.
Implementation Method 1
a low refractive layer LRL disposed on the color conversion layer CCL... The low refractive layer LRL may improve light efficiency of the display device by recycling light provided from the color conversion layer CCL by total reflection
Data Source
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AI summary
A display device includes a bank including an opening defining a plurality of pixels; a plurality of light emitting elements disposed in the plurality of pixels; a color conversion layer disposed on the plurality of light emitting elements in the opening; and a low refractive layer disposed on the color conversion layer in the opening.