Reflective Sheet Spectral Tuning for Multi-Panel Display Color Consistency
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Solution Overview
Problem
Display devices with multiple panels face challenges in minimizing color sensation differences between images displayed on adjacent panels due to varying chromaticity coordinate regions of light emitted by different light sources, leading to inconsistent color impressions.
Innovation Solution
The use of first and second backlight assemblies with reflective sheets made of different materials, where the first reflective sheet reflects first light toward a first display panel and the second reflective sheet reflects second light toward a second display panel, ensuring that the reflected light has substantially the same chromaticity coordinate region, thereby minimizing color differences between images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different light sources with varying chromaticity coordinate regions are used in multiple backlight assemblies, then manufacturing costs are reduced and design flexibility is improved, but color sensation differences between adjacent display panels increase
Solution Approach 1:
The patent applies local quality by making each reflective sheet have different spectral reflectance characteristics tailored to its specific light source. The first reflective sheet is designed with a first spectral reflectance curve optimized for the first light source's chromaticity region, while the second reflective sheet has a second spectral reflectance curve optimized for the second light source's chromaticity region. This localized optimization allows each panel to achieve consistent white point and color temperature despite using different light sources, thereby resolving the contradiction between design flexibility and color consistency.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the spectral reflectance characteristics of the reflective sheets to compensate for differences in light source chromaticity. By changing the reflectance parameters (spectral curves) of the reflective sheets, the system can transform light from different chromaticity regions into a unified output that produces consistent color sensation across panels, while still allowing flexibility in light source selection.
2Reliability
If reflective sheets with different spectral reflectance characteristics are used to compensate for light source variations, then color consistency is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent makes each reflective sheet have different spectral reflectance characteristics tailored to its specific light source. The first reflective sheet is designed with a first spectral reflectance curve optimized for the first light source's chromaticity region, while the second reflective sheet has a second spectral reflectance curve optimized for the second light source's chromaticity region. This localized optimization allows each panel to achieve consistent white point and color temperature despite using different light sources, thereby resolving the contradiction between design flexibility and color consistency.
3Reliability
If the same light source type is used in all backlight assemblies, then color consistency is maintained, but manufacturing flexibility and cost optimization are reduced
Solution Approach 1:
The patent applies local quality by making each reflective sheet have different spectral reflectance characteristics tailored to its specific light source. The first reflective sheet is designed with a first spectral reflectance curve optimized for the first light source's chromaticity region, while the second reflective sheet has a second spectral reflectance curve optimized for the second light source's chromaticity region. This localized optimization allows each panel to achieve consistent white point and color temperature despite using different light sources, thereby resolving the contradiction between design flexibility and color consistency.
Solution Approach 2:
The patent achieves universality by creating a system where multiple types of light sources can be used across different panels while still achieving consistent color output. The reflective sheets are designed to work with their respective light sources to produce a unified visual appearance, making the overall display system adaptable to different light source options without sacrificing color consistency.
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 allows for the minimization of color sensation differences between images on multiple display panels, enabling the use of light sources with wide-ranging chromaticity coordinates and reducing manufacturing costs by ensuring consistent color output across panels.
Implementation Method 1
a first reflective sheet configured to reflect the first light toward the first display panel
Data Source
AI summary
A display device includes first and second display panels, a first backlight assembly including a first light source that emits first light and a first reflective sheet that reflects the first light, and a second backlight assembly including a second light source that emits second light. A chromaticity coordinate region of the second light is different from a chromaticity coordinate region of the first light. The second backlight also assembly includes a second reflective sheet that reflects the second light and includes a second material different from a first material of the first reflective sheet. The first reflective sheet reflects the first light as third light toward the first display panel, and the second reflective sheet reflects the second light as fourth light toward the second display panel. A chromaticity coordinate region of the third light and a chromaticity coordinate region of the fourth light are substantially the same.