Flexible Display Reflection Prevention Unit with Segmented Color Filters
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Solution Overview
Problem
Display devices experience visibility reduction due to reflection phenomena caused by external natural light, and existing solutions, such as optical films, are inadequate in preventing reflection while maintaining pure black color sense characteristics.
Innovation Solution
A display device with a specific arrangement of light emitting areas and color filters, including a reflection prevention unit with partition patterns and color filters, is designed to reduce reflection and enhance black color sense characteristics, allowing for a more effective prevention of light reflection and improved visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an optical film is used to prevent reflection, then reflection phenomenon is reduced, but black color sense characteristics deteriorate
Solution Approach 1:
The reflection prevention unit is divided into multiple color filters (first color filter for red light, second color filter for blue light, third color filter for green light) that are selectively arranged in different pixel rows. This segmentation allows each color filter to address reflection in its specific wavelength range while maintaining accurate black color representation across all color channels.
Solution Approach 2:
Different color filters are applied to different pixel rows based on their light emission characteristics. The first color filter is disposed on red light emitting pixel rows, the second color filter on blue light emitting pixel rows, and the third color filter on green light emitting pixel rows. This local quality approach ensures that each region has the specific optical property needed to prevent reflection while maintaining color accuracy.
2Object-affected harmful factors
If color filters are added to prevent reflection, then reflection is reduced, but device complexity increases
Solution Approach 1:
The color filters serve dual functions: they prevent reflection of external light in their respective wavelength ranges and simultaneously maintain the black color sense characteristics by being selectively disposed on corresponding color pixel rows. The third color filter (green) also serves as a base layer for the first and second color filters, further integrating multiple functions into a unified structure.
Solution Approach 2:
The first color filter and second color filter are disposed on the third color filter in the peripheral area, creating a nested structure. This nesting approach consolidates multiple reflection prevention functions into a compact arrangement, reducing overall device complexity while maintaining effectiveness.
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 effectively minimizes reflection and achieves a closer representation of pure black in the display device, even when the device is in an OFF state, with reduced color shift and improved flexibility, particularly in foldable displays.
Implementation Method 1
a third color filter overlapping the fifth light emitting area and the sixth light emitting area, where a portion of the first color filter, which is disposed in the peripheral area, is disposed on the third color filter and overlaps the third color filter
Implementation Method 2
a first color filter overlapping the first light emitting area and the fourth light emitting area, a second color filter overlapping the second light emitting area and the third light emitting area
Data Source
AI summary
A display device includes a display panel and a reflection prevention unit. The reflection prevention unit includes a partition pattern overlapping a surrounding unit and having first, second, third, fourth, fifth, and sixth openings corresponding to first, second, third, fourth, fifth, and sixth light emitting areas defined therein, a first color filter overlapping the first light emitting area and the fourth light emitting area, a second color filter overlapping the second light emitting area and the third light emitting area, and a third color filter overlapping the fifth light emitting area and the sixth light emitting area. A portion of the third color filter, which is disposed in the peripheral area, is disposed on the third color filter.