Title:
METAL HALIDE LAMP
Document Type and Number:
Japanese Patent JP3216823
Kind Code:
B2
Abstract:
PURPOSE: To enable the visible state of color, particularly the complexion of a Japanese to be reproduced in natural color state, regardless of actual color near bulb color, by using a light emitting tube containing mercury, rare gas or the like as sealed, and selecting the chromaticity point of luminescent color within the predetermined chromaticity range.
CONSTITUTION: A light emitting tube internally fitted with a pair of electrodes, and containing mercury, rare gas and metal halide as sealed is used for this metal halide lamp. In addition, the chromaticity point of luminescent color is selected within a chromaticity range A enclosed with four points (a), (b), (c) and (d) represented by (0.4135, 0.3765), (0.4372, 0.3810), (0.4457, 0.3970) and (0.4190, 0.3890) on X-Y chromaticity ordinates. Also, relative chromaticity temperature is selected within the range of 2800K to 3200K. As a result, natural body color and the flesh color of a Japanese, though near bulb color, can be reproduced in beautiful state.
Inventors:
Takashi Yamamoto
Shingo Tsutsumi
Kuninobu Kenshin
Shingo Tsutsumi
Kuninobu Kenshin
Application Number:
JP2490192A
Publication Date:
October 09, 2001
Filing Date:
February 12, 1992
Export Citation:
Assignee:
Matsushita Electronics Industrial Co., Ltd.
International Classes:
H01J61/20; H01J61/88; (IPC1-7): H01J61/88; H01J61/20
Domestic Patent References:
| JP5193575A | ||||
| JP1320752A | ||||
| JP63232254A |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
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