Quantum Dot Color Filter for Display Heat Reduction
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Solution Overview
Problem
Existing display technologies face challenges in achieving a wide color gamut and high peak luminance due to inefficiencies in light transmission, leading to wasted light and heat generation, which degrades performance and shortens the lifespan of image displays.
Innovation Solution
The use of light regeneration materials in color filters and optical layers to enhance optical efficiency by converting shorter-wavelength light into longer-wavelength light, and controlling spectral power distributions for individual pixels to prevent metamerism failures and achieve desired color rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional photolithographic color filters are used, then color filtering is achieved, but light is wasted and heat is generated which degrades performance
Solution Approach 1:
The patent converts the harmful effect of blue light (which causes heat generation when filtered) into a beneficial effect by using quantum dots to convert blue light into green light, and red phosphor to convert blue light into red light. This transforms the problematic short-wavelength light that causes heat into useful longer-wavelength light for display purposes, eliminating waste and heat generation while maintaining color filtering functionality
Solution Approach 2:
The patent changes the wavelength parameter of light through quantum dot and phosphor conversion. Instead of filtering out short-wavelength blue light (which causes heat), the system converts blue light into medium-wavelength green and long-wavelength red light, fundamentally changing the spectral parameters to achieve efficient color generation without heat loss
2Illumination intensity
If expensive optical components are integrated to achieve wide color gamut and high peak luminance, then display performance is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements self-service by integrating light conversion materials directly into the backlight unit, allowing the backlight to generate its own spectral components (blue, green, red) through quantum dot and phosphor conversion. This eliminates the need for separate, expensive optical components to generate these wavelengths, reducing device complexity while achieving wide color gamut and high peak luminance
Solution Approach 2:
The patent merges the light conversion function into the backlight unit itself, combining the blue LED light source with quantum dot and phosphor materials in a single integrated structure. This consolidation eliminates the need for multiple separate optical components, reducing complexity while maintaining high performance
3Ease of manufacture
If light is filtered by color filter arrays, then color modulation is achieved, but a significant portion of light is rejected and converted into heat
Solution Approach 1:
The patent converts the harmful rejection of light by color filters into beneficial light generation. Instead of filtering out blue light to create green and red colors (which wastes energy), quantum dots and phosphors actively convert blue light into green and red light, transforming energy rejection into energy utilization and eliminating heat generation
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 approach enables the display system to achieve a high dynamic range, wide color gamut, and saturated colors, while reducing heat generation and improving the overall efficiency and longevity of the display.
Implementation Method 1
The use of light regeneration materials in color filters and optical layers to enhance optical efficiency by converting shorter-wavelength light into longer-wavelength light
Implementation Method 2
light regeneration materials in color filters and optical layers to enhance optical efficiency by converting shorter-wavelength light into longer-wavelength light
Data Source
AI summary
Image data is received for rendering an image on an image display to a viewer (402). The image data specifies a pixel value of the image for a pixel of the image display to render. The pixel value for the pixel includes multiple component pixel values corresponding to multiple color components of a color space. A color gamut locational value of the pixel value is computed based on two or more component pixel values in the multiple component pixel values of the pixel value specified for the pixel (404). The color gamut locational value is used to determine whether bandwidth broadening is to be applied to image rendering light produced by the pixel of the image display to render the pixel value (406). The image rendering light is directed to the viewer.