OLED Array Substrate with Color Filters for High Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for fabricating OLED display panels face challenges in achieving high resolution due to the limitations of fine metal masks, which result in precision issues and color crosstalk, leading to decreased product quality and increased power consumption.
Innovation Solution
The proposed solution involves an array substrate with a base substrate and pixel elements that include a pixel light-emitting layer and multiple color filters, where the orthographic projections of the filters overlap with the pixel light-emitting layer, allowing for improved resolution and reduced power consumption by self-emission, thereby lowering the probability of color crosstalk and simplifying the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine metal mask is used to fabricate sub-pixels in respective colors through evaporation, then sub-pixels can emit light in their corresponding colors through self-emission, but the manufacturing precision and resolution are limited due to the difficulty of fabricating fine metal masks with high precision
Solution Approach 1:
The patent extracts the color definition function from the complex fine metal mask structure and relocates it to simpler color filter layers. By separating the light emission function (handled by organic light-emitting layers) from the color selection function (handled by color filters), the patent eliminates the need for high-precision fine metal masks while maintaining sub-pixel color accuracy and achieving higher resolution.
Solution Approach 2:
The patent introduces color filter layers as intermediary components between the organic light-emitting layers and the viewer. These color filters act as mediators that receive broad-spectrum light from the organic light-emitting layers and selectively transmit specific colors, thereby defining sub-pixel colors without requiring precise metal mask patterning.
2Reliability
If fine metal mask is used for sub-pixel fabrication, then self-emission can be achieved, but color crosstalk occurs due to misalignment or deformation of the fine metal mask openings
Solution Approach 1:
The patent extracts the color definition function from the fine metal mask and transfers it to dedicated color filter layers. This separation eliminates the coupling between structural alignment and color accuracy, allowing color filters to be precisely positioned independently of the organic light-emitting layer fabrication, thereby preventing color crosstalk.
Solution Approach 2:
The patent uses color filter layers that are fabricated with precise patterns to define sub-pixel boundaries and colors. These color filter patterns serve as accurate templates that guide the formation of organic light-emitting layers, ensuring that each sub-pixel emits the correct color without interference from adjacent sub-pixels.
3Manufacturing precision
If fine metal mask fabrication is performed with high precision requirements, then resolution can be improved, but the fabrication process becomes more complex and time-consuming
Solution Approach 1:
The patent extracts the high-precision patterning requirement from the evaporation process and relocates it to the color filter fabrication step, which can be performed using more efficient and less complex methods. This allows the organic light-emitting layers to be deposited over larger areas without requiring prohibitively precise masks, thereby improving fabrication efficiency while maintaining high resolution through the color filter patterns.
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 approach enhances the resolution of OLED display panels, reduces the likelihood of color crosstalk, and lowers power consumption, resulting in improved product quality and extended service life.
Implementation Method 1
sub-pixels in the OLED display panel are generally fabricated by fabricating the sub-pixels in respective colors using a Fine Metal Mask (FFM) and through evaporation so that the sub-pixels in the respective different colors emit light in their corresponding colors through self-emission
Implementation Method 2
at least two different color filters located on a side of the pixel light-emitting layer away from the base substrate
Data Source
AI summary
This disclosure discloses an array substrate, a method for fabricating the same, and a display device. The array substrate includes: a base substrate; and a plurality of pixel elements located on one side of the base substrate, wherein each of the pixel elements includes: a pixel light-emitting layer, and at least two different color filters located on the side of the pixel light-emitting layer away from the base substrate; the pixel light-emitting layer includes a first sub-pixel light-emitting layer and a second sub-pixel light-emitting layer; and in the same pixel element, an orthographic projection of each of the filters onto the base substrate has an overlap area with an orthographic projection of the second sub-pixel light-emitting layer onto the base substrate.