Display Device Color Filter Segmentation for Gamut and Brightness
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Solution Overview
Problem
Conventional display devices that expand the color gamut range by including emerald green color filters tend to reduce image brightness due to the decrease in the area of each color filter, which affects the reproducible color gamut and overall image quality.
Innovation Solution
The display device incorporates first and second green color filters with hues closer to blue and green, respectively, arranged in alternating groups with red and blue color filters, along with white color filters, to maintain image brightness while expanding the color gamut range. This configuration allows for a reduced number of color filters in each group, ensuring that the color gamut can be reproduced effectively without compromising brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If emerald green color filters are included to expand the color gamut range, then the reproducible color gamut range is expanded, but the area of each color filter decreases causing image brightness to decrease
Solution Approach 1:
The invention divides the green color filter population into two distinct segments: first green color filters and second green color filters (emerald green). By segmenting the green filters into different types with different areas, the patent achieves both color gamut expansion and brightness maintenance. Specifically, the second green color filters have smaller areas than the first green color filters, allowing the inclusion of emerald green in the color gamut while limiting the total area of small green filters to prevent excessive brightness reduction.
Solution Approach 2:
The invention applies different area specifications to different types of green color filters within the same display device. The first green color filters have a larger area optimized for brightness contribution, while the second green color filters have a smaller area optimized for color gamut expansion. This local differentiation of filter qualities allows simultaneous optimization of both brightness and color gamut without compromising either parameter.
2Adaptability or versatility
If multiple green color filters are included in all groups to expand color gamut, then the color gamut range is expanded, but the number of color filters per group increases reducing individual filter area
Solution Approach 1:
The invention segments the green color filter function into two distinct filter types with different area characteristics. The first green color filters serve as primary green filters with larger areas, while the second green color filters (emerald green) serve as supplementary filters with smaller areas. This segmentation allows the system to include multiple green filters in each group without uniformly reducing all filter areas, thereby maintaining adequate brightness while expanding color gamut.
Solution Approach 2:
The invention changes the area parameter differently for different types of green color filters. Instead of uniformly reducing the area of all green filters when adding emerald green to the color gamut, the patent specifies that the second green color filters have smaller areas than the first green color filters. This parameter differentiation resolves the contradiction by allowing area reduction only where necessary for the additional color filter type.
3Illumination intensity
If the number of color filters in each group is reduced to maintain brightness, then image brightness is maintained, but the reproducible color gamut range is limited
Solution Approach 1:
The invention segments the green filter population into two functional categories with different area allocations. The first green color filters maintain larger areas to ensure sufficient brightness contribution, while the second green color filters have smaller areas that allow color gamut expansion without significantly impacting overall brightness. This segmentation enables the system to include multiple green filter types while maintaining both brightness and color gamut performance.
Solution Approach 2:
The invention applies different area specifications to different green filter types based on their functional roles. The first green color filters are designed with larger areas optimized for brightness, while the second green color filters are designed with smaller areas optimized for color gamut expansion. This local quality differentiation allows the system to achieve both high brightness and expanded color gamut simultaneously.
Data Source
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AI summary
A display device capable of expanding a reproducible color gamut range while suppressing a decrease in image brightness is provided. The display device (100) includes a display portion (10) in which first groups (C1) and second groups (C2) are disposed to line up regularly with each other. The first groups (C1) includes red color filters (R), blue color filters (B) and first green color filters (G1), and the second groups (C2) includes the red color filters (R), the blue color filters (B) and second green color filters (G2). The second group (C2) is equal to the first groups (C1) in number of color filters (11) and different from the first groups (C1) in filter combination.