Color Filter Unit Protrusions for Display Viewing Angle
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Solution Overview
Problem
Conventional color filter units in display apparatuses suffer from a narrowed viewing angle and uneven light brightness due to manufacturing defects and the brightness ratio between the front and side surfaces.
Innovation Solution
A color filter unit design featuring an upper substrate with a first-color, second-color, and third-color filter layers, a transparent layer with protrusions and scattering particles, and quantum dot layers, along with a spacer and protective layers, to enhance viewing angle and reduce defect rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional color filter unit is used, then the manufacturing process is simple, but the viewing angle is narrowed and brightness ratio between front and side surfaces is uneven
Solution Approach 1:
The patent introduces a transparent layer with protrusions at specific locations (corresponding to pixel positions) rather than uniformly modifying the entire structure. This localized approach improves viewing angle and brightness uniformity while maintaining manufacturing simplicity for the bulk of the structure.
Solution Approach 2:
The patent adds vertical dimension features (protrusions extending upward from the transparent layer) to control light emission characteristics. This three-dimensional structure modifies the brightness ratio between front and side surfaces without complicating the overall manufacturing process.
2Ease of manufacture
If manufacturing operations are performed conventionally, then the process is straightforward, but defect rate increases and viewing angle is limited
Solution Approach 1:
The transparent layer with protrusions is formed before bonding the color filter unit to the substrate. This preliminary structuring allows for better alignment and reduces the risk of defects during subsequent manufacturing steps, while the protrusions themselves serve as alignment features.
3Device complexity
If the brightness ratio between front surface and side surface is not controlled, then the manufacturing process is simpler, but the viewing angle is narrowed
Solution Approach 1:
The patent applies the transparent layer with protrusions only in specific regions where light emission control is needed, rather than uniformly modifying the entire color filter unit. This localized modification improves viewing angle while minimizing additional structural complexity.
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 improves the viewing angle and reduces the brightness ratio between the front and side surfaces, resulting in a more effective and reliable display apparatus with improved color reproducibility and reduced defect rates.
Implementation Method 1
a transparent layer on the first-color color filter layer and having one or more protrusions in a direction away from the first surface
Implementation Method 2
a second color quantum dot layer on the second-color color filter layer, and a third color quantum dot layer on the third-color color filter layer
Data Source
AI summary
A color filter unit and a display apparatus including the same is provided, wherein the color filter unit includes an upper substrate, a first-color color filter layer, a second-color color filter layer, and a third-color color filter layer on a first surface that is a lower surface of the upper substrate, a transparent layer on the first-color color filter layer and having one or more protrusions in a direction away from the first surface, a second color quantum dot layer on the second-color color filter layer, and a third color quantum dot layer on the third-color color filter layer.