Overlapping Color Filter Layout for Low-Reflectivity Displays
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Solution Overview
Problem
Existing display devices face challenges in minimizing external light reflectivity and enhancing color reproducibility, which affects image characteristics.
Innovation Solution
A display device design that includes sub-pixels with light emitting elements of different colors, bank layers, and overlapping color filter patterns to reduce external light reflectivity and improve color reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional color filter arrangements are used in display devices, then device complexity is reduced, but external light reflectivity increases and color reproducibility deteriorates
Solution Approach 1:
The color filter layer is divided into multiple color filter patterns (first, second, third color filter patterns) corresponding to different sub-pixels. Each color filter pattern is selectively disposed on specific sub-pixels and bank layers, creating a segmented arrangement that reduces external light reflectivity while maintaining color reproducibility without requiring complete redesign of the entire filter system
Solution Approach 2:
The color filter patterns are arranged in specific spatial relationships including overlapping configurations on the bank layer. This spatial arrangement in multiple dimensions (overlapping, adjacent, alternating patterns) creates optical interference effects that reduce external light reflectivity while preserving color accuracy, resolving the contradiction between simplicity and performance
2Manufacturing precision
If overlapping color filter patterns are implemented, then color reproducibility is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The bank layer serves as an intermediary structure that supports and positions the color filter patterns. By disposing color filter patterns on both sub-pixels and bank layers, the bank layer acts as a stable platform that facilitates precise alignment during manufacturing, reducing the overall precision requirements while enabling the overlapping configuration needed for color reproducibility
Solution Approach 2:
Different color filter patterns are selectively disposed on different sub-pixels and bank layer regions. This local differentiation (first color filter pattern on first sub-pixel, second on second sub-pixel, etc.) allows each region to be optimized independently, making the manufacturing process more manageable while achieving superior overall color reproducibility through the coordinated arrangement
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 proposed solution effectively minimizes external light reflectivity and enhances color reproducibility, leading to improved image characteristics in display devices.
Implementation Method 1
a first color filter pattern disposed on the first sub-pixel and the bank layer; and a second color filter pattern disposed on the second sub-pixel and the bank layer
Implementation Method 2
The first color filter pattern and the second color filter pattern at least partially overlap each other on the bank layer
Data Source
AI summary
A display device may include a first sub-pixel including a first light emitting element disposed in a first sub-pixel area of a substrate, a second sub-pixel including a second light emitting element disposed in a second sub-pixel area located in a first direction with respect to the first sub-pixel area of the substrate, a bank layer disposed between the first and second sub-pixels, a first color filter pattern disposed on the first sub-pixel and the bank layer, and a second color filter pattern disposed on the second sub-pixel and the bank layer. The first light emitting element may emit light having a first color. The second light emitting element may emit light having a second color. The first color filter pattern and the second color filter pattern may at least partially overlap each other on the bank layer.