Display Pixel Layer Structure for Preventing Color Mixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices suffer from color mixing between adjacent pixels and sub-pixels, which affects display quality and color accuracy.
Innovation Solution
A display device design that includes a bank layer with a wavelength control pattern and a color absorbing layer to reduce color mixing, utilizing a capping layer with specific areas corresponding to the color absorbing layer and bank layer to prevent light interference between adjacent pixels and sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional display structure without additional light control layers is used, then the device complexity is low, but color mixing between adjacent pixels and sub-pixels occurs
Solution Approach 1:
The light control function is segmented into multiple specialized layers: the bank layer segments light paths vertically, the wavelength control pattern segments different wavelengths, and the color absorbing layer segments specific color ranges. This segmentation allows each layer to perform its specific function efficiently, preventing color mixing while maintaining overall system manageability.
Solution Approach 2:
The capping layer acts as an intermediary between the bank layer and the color absorbing layer, providing structural support and ensuring proper optical coupling. This intermediary layer facilitates the interaction between the bank layer's physical segmentation and the color absorbing layer's spectral filtering, enabling effective color mixing prevention.
2Reliability
If the capping layer is positioned between the color absorbing layer and bank layer, then light interference is effectively blocked, but the manufacturing process complexity increases
Solution Approach 1:
The bank layer is formed first to establish the basic light path segmentation structure. Subsequently, the wavelength control pattern and color absorbing layer are added in sequence, with the capping layer positioned to protect and integrate these previously formed structures. This preliminary action approach allows each layer to be optimized independently while ensuring proper integration.
3Manufacturing precision
If multiple light control layers are added to prevent color mixing, then color accuracy improves, but the device thickness increases
Solution Approach 1:
The bank layer, wavelength control pattern, and color absorbing layer are implemented as thin film structures with optimized thicknesses. The capping layer provides structural integrity while maintaining minimal thickness. This thin film approach enables effective light control and color mixing prevention while keeping the overall device thickness within acceptable limits for modern display applications.
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
Effectively prevents color mixing, improving color accuracy and matching rates in the display device by blocking unwanted light emissions and enhancing light efficiency.
Implementation Method 1
a color absorbing layer which corresponds to the bank layer and blocks the light of the first color and the light of the second color
Implementation Method 2
a wavelength control pattern in the opening
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display device includes a first display substrate including a light emitting element which emits light of a first color or light of a second color different from the first color, a second display substrate including in order toward the first display substrate, a layer including both a bank layer defining an opening and a wavelength control pattern in the opening, a capping layer covering the wavelength control pattern and the bank layer, and a color absorbing layer which corresponds to the bank layer and blocks the light of the first color and the light of the second color. The capping layer includes a first area corresponding to the color absorbing layer, the bank layer includes a second area corresponding to the color absorbing layer, and the first area of the capping layer is between the color absorbing layer and the second area of the bank layer.