Color Conversion Plate Layout for Wider Gamut and Light Purity
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Solution Overview
Problem
Current display technologies face challenges in enhancing the light efficiency and color gamut of images displayed on panels, as they struggle to precisely control the wavelength of light emitted by subpixels, leading to suboptimal image quality and color representation.
Innovation Solution
A color conversion plate is introduced, featuring color conversion areas with specific materials that convert light of one wavelength band into another, transmissive areas that allow light to pass through unchanged, and reflection barrier ribs to separate these areas, positioned between the backlight unit and the display panel, enhancing light purity and gamut by separating and directing light wavelengths effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a color conversion plate with multiple color conversion areas and transmissive areas is introduced, then the color gamut and light efficiency are enhanced, but the device complexity increases
Solution Approach 1:
The color conversion plate is segmented into multiple color conversion areas (first color conversion areas with first color conversion material, second color conversion areas with second color conversion material) and transmissive areas, each responsible for converting or transmitting specific wavelength bands. This segmentation enables precise control over the spectral composition of light reaching the display panel, thereby enhancing color gamut while maintaining manageable complexity through functional specialization.
Solution Approach 2:
Different regions of the color conversion plate are assigned different optical properties: color conversion areas contain materials with specific emission characteristics tailored to their location, while transmissive areas allow direct light passage. This local differentiation of optical qualities enables precise wavelength control for each color channel, improving overall color performance without requiring uniform complexity across the entire plate.
2Manufacturing precision
If reflection barrier ribs are added to separate color conversion areas, then color mixing between subpixels is prevented, but manufacturing complexity increases
Solution Approach 1:
Reflection barrier ribs are extracted as separate structural elements that protrude from the color conversion plate surface. These ribs are positioned between adjacent color conversion areas and transmissive areas to create physical and optical separation. By extracting the barrier function into distinct rib structures rather than integrating it into the plate substrate, the design achieves effective color isolation while simplifying the manufacturing process through modular assembly.
3Illumination intensity
If color conversion materials are used to convert light wavelength, then light purity and efficiency are improved, but energy loss occurs during conversion
Solution Approach 1:
The patent combines multiple color conversion materials (first color conversion material in first color conversion areas, second color conversion material in second color conversion areas) within a single color conversion plate structure. This merging approach allows simultaneous conversion of different wavelength bands through different materials, achieving high light purity across multiple color channels while optimizing overall energy utilization by processing the full spectrum of backlight light rather than relying on a single conversion pathway.
Solution Approach 2:
The color conversion plate maintains continuous optical action by combining transmissive areas (which allow direct light passage without conversion loss) and color conversion areas (which convert specific wavelength bands). This continuous action ensures that light not requiring conversion passes through efficiently while only the necessary portions undergo conversion, minimizing overall energy loss while maintaining high light purity for the converted wavelengths.
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 solution significantly increases the efficiency and purity of light supplied to the color filters, thereby enhancing the color gamut and luminance of the displayed images, while reducing power consumption and preventing color mixing between subpixels.
Implementation Method 1
a color conversion material configured to convert at least a portion of the light of the first wavelength band into light of a wavelength band that is different from the first wavelength band
Implementation Method 2
at least one reflection barrier rib that separates the plurality of color conversion areas and the plurality of transmissive areas from each other, the at least one reflection barrier rib configured to reflect incident light
Data Source
AI summary
A color conversion plate and a display device are disclosed. Since a color conversion plate including a color conversion area and a transmissive area separated by a reflection barrier rib is in the path where light is supplied to the color filter, efficiency and purity of light supplied to the color filter is enhanced and the color gamut of the light emitted to the outside of the display device through the color filter is also enhanced.