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A new package structure with three convex phosphor layers is shown to enhance the angular color uniformity based on modeling and experimental verification. The color uniformity has been improved by tailoring the phosphor concentration distribution of the three layers. The experimental measurements indicate that the deviation of angular correlated color temperature (CCT) can be reduced from 152.9,...
In many industrial cooperative design systems, experts from different sub-systems propose one sub-solution or more. One sub-solution of a sub-system may be dependent on sub-solutions from other sub-systems. We need to describe dependencies between sub-solutions, choose one sub-solution from each sub-system respectively, and then combine them into an integrated solution of the system. Normally, we...
In this paper, we investigated the connection between the employment of multi-chromatic phosphor and CRI value for WLED devices by simulation, using the excitation and emission spectra of phosphor and surface source property of LED chips acquired from experiments. CRI value was examined in the range of 56.8–76.0 due to the change of phosphor concentration, for traditional blue-pumped yellow phosphor...
This paper studies the problems which will be met in the application of color communication and identification in multimedia human-computer interface design, including, according to the discrimination on lightness, pureness and hue of color information in interface design, testing and evaluating the ergonomics image scale for validity of user's color identification course, and obtaining color matching...
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