Color Filter Layout for Flat Display Edge Transitions
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Solution Overview
Problem
Display devices face challenges in minimizing the height difference between the display area and the non-display area, leading to potential optical film voids and appearance defects.
Innovation Solution
A display device design that includes a substrate with a display area and a non-display area, featuring sub-pixels with light emitting elements, color control members, and color filter layers, where the color filter layers extend into the non-display area to reduce height differences and prevent voids under optical films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display area and non-display area are formed with different height levels, then the structural definition is clear, but height difference and appearance defects occur
Solution Approach 1:
The patent extends the color filter layer from the display area into the non-display area in the planar dimension, creating a gradual height transition that eliminates the abrupt height difference between areas while maintaining clear structural definition through the dam member configuration
2Device complexity
If the color filter layer is confined to the display area, then the structure is simple, but voids form under optical films in the non-display area
Solution Approach 1:
The color filter layer is extended into the non-display area in advance, creating a gradual height transition that prevents void formation under optical films before the optical film is applied, thereby eliminating the harmful effect of voids without adding complex structural elements
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 design effectively reduces the height difference between the display and non-display areas, preventing voids and appearance defects when an optical film is applied, thereby enhancing the display's visual integrity.
Implementation Method 1
a first wavelength conversion layer disposed in the first sub-pixel, and a second wavelength conversion layer disposed in the second sub-pixel different from the first sub-pixel
Data Source
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AI summary
A display device includes a substrate including a display area and a non-display area surrounding the display area, a plurality of sub-pixels including a first sub-pixel and a second sub-pixel, an upper bank layer surrounding the sub-pixels and the display area, a plurality of color control members including a first wavelength conversion layer in the first sub-pixel and a second wavelength conversion layer in the second sub-pixel, a plurality of color filter layers including a first color filter layer on the first wavelength conversion layer, and a second color filter layer on the second wavelength conversion layer, and a third color filter layer, a dam member surrounding the display area in the non-display area, and a valley between the dam member and the upper bank layer and surrounding the display area. The third color filter layer is on the first color filter layer in the non-display area.