Color Filter and Bank Layer Layout for Brighter Display Panels
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Solution Overview
Problem
Existing display devices face challenges in achieving high display quality with wide viewing angle, high brightness, and low power consumption while maintaining a compact form factor, particularly in self-light emitting displays like OLEDs.
Innovation Solution
The display device incorporates a substrate with light transmission and blocking regions, color filter patterns, and a bank layer with defined openings and spacers, utilizing an innovative manufacturing process such as an inkjet process, to enhance the color quality and improve the display quality by providing a substrate with a color conversion layer, and a method of providing a display device that includes a substrate with light transmission and blocking regions, color filter patterns, and a bank layer with defined openings and spacers, enhancing color separation and light management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If color filter patterns are used to achieve high color quality, then color separation is improved, but light blocking increases and brightness decreases
Solution Approach 1:
The patent applies local quality by creating different structural characteristics in different regions of the display device. In the light transmission region, the bank layer has openings that allow light to pass through, while in the light blocking region, the bank layer is continuous. This local differentiation enables color filter patterns to achieve good color separation in specific areas without uniformly blocking light across the entire display, thus maintaining brightness where needed.
Solution Approach 2:
The patent segments the display device into distinct light transmission regions and light blocking regions. Within these regions, the bank layer is further segmented into different configurations (openings vs. continuous structure). This segmentation allows the color filter patterns to be optimized for color separation in specific segments while other segments maintain light transmission properties, resolving the contradiction between color quality and brightness.
2Manufacturing precision
If light blocking regions are increased to improve color separation, then color mixing is reduced, but overall light transmission decreases and display quality deteriorates
Solution Approach 1:
The patent implements local quality by confining light blocking functionality to specific regions (light blocking regions) rather than applying it uniformly. In these localized regions, the bank layer forms continuous structures that block light and prevent color mixing. Meanwhile, light transmission regions maintain openings in the bank layer that allow light passage, preserving overall display quality and preventing uniform degradation of display performance.
Solution Approach 2:
The bank layer serves as an intermediary structure that mediates between the color filter patterns and the light transmission requirements. By strategically positioning the bank layer with different configurations (openings or continuous structures) in different regions, it acts as a mediator that enables color separation where needed while maintaining light transmission where required, thus resolving the contradiction between color separation and overall display quality.
3Illumination intensity
If bank layer openings are used to improve light transmission, then brightness is enhanced, but color separation capability is reduced
Solution Approach 1:
The patent segments the display into light transmission regions and light blocking regions with different bank layer configurations. In light transmission regions, openings in the bank layer enhance brightness by allowing light to pass through. In light blocking regions, continuous bank layer structures provide color separation. This spatial segmentation allows both brightness enhancement and color separation to coexist in different parts of the display, resolving the contradiction between these two requirements.
Solution Approach 2:
The patent applies local quality by providing different bank layer structures in different locations. Where brightness is prioritized (light transmission regions), openings are provided in the bank layer. Where color separation is prioritized (light blocking regions), continuous structures are used. This localized differentiation enables the system to optimize for brightness in specific areas without compromising color separation capabilities in other areas.
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 display quality by optimizing light transmission and blocking, reducing color mixing, and enhancing color separation, resulting in improved brightness, contrast, and reduced power consumption.
Implementation Method 1
a first color filter pattern which is on the substrate and selectively transmits light of a first color, a second color filter pattern which is on the substrate and selectively transmits light of a second color different from the first color
Implementation Method 2
a bank layer facing the substrate with the first color filter pattern therebetween, in the light transmission region, each of a first opening defined in the bank layer
Data Source
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AI summary
A display device includes a substrate including a light transmission region and a light blocking region, a first color filter pattern which is on the substrate and selectively transmits light of a first color, a bank layer facing the substrate with the first color filter pattern therebetween, in the light transmission region each of a first opening defined in the bank layer and a wavelength control pattern in the first opening of the bank layer, and in the light blocking region each of a second opening defined in the bank layer and spaced apart from the first opening; and a spacer in the second opening of the bank layer. Each of the first opening and the second opening corresponds to the first color filter pattern.