Cathode ray tube with panel provided with colored layer
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAtsushi Suzuki, Masahiro Yamamura, Yasunori Miura
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Abstract
This is a cathode ray tube having a panel provided with a colored layer on an outer surface of a face portion, wherein an emission luminance ratio is 75% or higher in a lowest part relative to a highest part, and a diffuse reflectance ratio is 90% or higher in a lowest part relative to a highest part in an image display area of the face portion. Due to this configuration, a cathode ray tube with a natural appearance can be obtained in which a luminance difference or a contrast difference is not perceived in the entire area of the face portion.
Claims9
A cathode ray tube comprising a panel provided with a colored layer containing a coloring agent on an outer surface of a face portion, wherein the coloring agent has a density distribution such that a ratio of an emission luminance in a part that exhibits the lowest emission luminance to an emission luminance in a part that exhibits the highest emission luminance is not less than 75% and a ratio of a diffuse reflectance in a part that exhibits the lowest diffuse reflectance to a diffuse reflectance in a part that exhibits the highest diffuse reflectance is not less than 90%.
Dependencies are inferred from the claim text.