Dual White RGB Color Filter for OLED Luminous Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
White light OLED displays face challenges with poor luminous efficiency and difficulty in achieving a perfect white point coordinate, leading to high power consumption due to the need for color matching or additional color filter layers.
Innovation Solution
A display panel design featuring a pixel array layer with white organic light emitting units and a color filter layer containing red, green, blue, first white, and second white filter patterns, where the first and second white filter patterns have different CIE color coordinates, enhancing luminous efficiency and allowing for power saving by optimizing the white point chromaticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color filter layer with three primary colors RGB is used in white light OLED display, then color display capability is improved, but luminous efficiency deteriorates and power consumption increases
Solution Approach 1:
The color filter layer is segmented into five distinct filter patterns (R, G, B, W1, W2) instead of traditional three-color filters. Each filter pattern is independently arranged in a pixel array, allowing selective light transmission to optimize both color display and luminous efficiency for different display regions
Solution Approach 2:
Different filter patterns are assigned to different pixel types based on their specific display requirements. W-RGB pixels use W1 or W2 filters for white sub-pixels, while saturated color pixels use R, G, or B filters. This local optimization ensures each pixel type achieves maximum luminous efficiency for its intended function
2Reliability
If traditional W-RGB color filter design is used, then color accuracy is maintained, but power consumption increases due to low luminous efficiency
Solution Approach 1:
Two distinct white filter patterns W1 and W2 are introduced with different optical parameters to achieve different white point chromaticities. This allows the display to optimize luminous efficiency by selecting the appropriate white filter for each pixel type while maintaining accurate color reproduction across the display
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 dual white-RGB color filter design achieves high luminous efficiency in unsaturated color intervals, resulting in power savings of approximately 20% compared to traditional W-RGB OLED displays, while maintaining color accuracy and stability.
Implementation Method 1
The pixel array layer includes a plurality of white organic light emitting units which generate a while light
Implementation Method 2
the color filter layer includes a plurality of red filer patterns, a plurality of green filter patterns, a plurality of blue filter patterns, a plurality of first white filter patterns, and a plurality of second white filter patterns
Data Source
AI summary
A display panel has first and second unit regions staggered to each other and includes a pixel array layer and a color filter layer. The pixel array layer includes white organic light emitting units generating a white light. The color filter layer includes red, green and blue filter patterns and first and second white filter patterns. A first white light CIE color coordinate of the white light passing through the first white filter patterns is different from a second white light CIE color coordinate of the white light passing through the second white filter patterns. Each first unit region has one red filter pattern, one green filter pattern, one blue filter pattern, and one first white filter pattern disposed therein, and each second unit region has one red filter pattern, one green filter pattern, one blue filter pattern, and one second white filter pattern disposed therein.