Transparent Partition Wall for Display Color Filter Inkjet Printing
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Solution Overview
Problem
Existing display devices with color filters formed by the ink jet method face a trade-off between cost reduction and compatibility between color characteristics and luminance viewing angle characteristics, as the black matrix required for excellent color characteristics can impair luminance when positioned high.
Innovation Solution
A display device configuration featuring a sealing layer, a light shielding layer, a transparent partition wall layer, and color filters formed in the gaps between light emitting portions using the ink jet method, which reduces material mixing and blocks less light, allowing for high positioning without luminance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the black matrix is provided at a high position to avoid mixing of color filter materials, then color characteristics are improved, but luminance viewing angle characteristics are impaired due to light blocking
Solution Approach 1:
The patent introduces a transparent partition wall layer as an intermediary structure between the light shielding layer and color filters. This transparent partition wall serves as a mediator that prevents color filter material mixing while allowing light transmission, thereby resolving the contradiction between achieving good color characteristics and maintaining luminance viewing angle characteristics.
Solution Approach 2:
The patent segments the light shielding function into two separate components: a light shielding layer (black matrix) and a transparent partition wall layer. The light shielding layer provides the necessary light blocking for color isolation, while the transparent partition wall layer provides physical separation for preventing material mixing without blocking light. This segmentation allows each component to optimize its specific function without compromising the other.
2Manufacturing precision
If the black matrix is positioned high to prevent material mixing, then color filter material separation is improved, but light transmission is reduced
Solution Approach 1:
The transparent partition wall layer acts as an intermediary structure that provides physical separation for material containment while maintaining light transmission. It serves as a barrier that prevents color filter materials from mixing between adjacent pixels without obstructing the light path from the light emitting portions to the viewer.
Solution Approach 2:
The patent applies different properties to different parts of the structure: the light shielding layer has high light absorption properties for material separation, while the transparent partition wall layer has high light transmission properties for maintaining luminance. This local differentiation of material properties allows each component to perform its specific function optimally.
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 configuration achieves cost reduction while enhancing compatibility between color characteristics and luminance viewing angle characteristics by using a transparent partition wall layer that transmits light, avoiding material mixing and maintaining luminance.
Implementation Method 1
Unlike the black matrix, the transparent partition wall layer transmits emitted light
Implementation Method 2
a light shielding layer disposed in a gap between the light emitting portions adjacent to each other in a row direction
Data Source
AI summary
Disclosed herein is a display device including a plurality of light emitting portions arranged in a form of a matrix, a sealing layer disposed on the plurality of light emitting portions, a light shielding layer disposed in a gap between the light emitting portions adjacent to each other in a row direction on the sealing layer and extending in a column direction, a transparent partition wall layer disposed on the light shielding layer and extending in the column direction, and a color filter disposed in a gap in the light shielding layer and the transparent partition wall layer on the sealing layer.