Communications: electrical – Systems – Signal light systems
Reexamination Certificate
2000-07-03
2001-09-25
Wu, Daniel J. (Department: 2736)
Communications: electrical
Systems
Signal light systems
C340S815450, C340S815530, C340S815730, C040S570000, C362S362000
Reexamination Certificate
active
06294983
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an emergency exit light, and more particularly to an emergency exit light whose thickness is considerably reduced without destroying the decoration style while the indicating effect is lighter and clearer.
2. Description of the Prior Art
A conventional emergency exit light, as disclosed in Taiwan Pat. No. 254463, 387693, 317352 and 341350 is designed in a manner of light box in which a fluorescent lamp is used as light source emitting from the inside to the outside in order that the words or the figures on the transparent plate can be presented to reach a directing or indicating aim. However, the fluorescent lamp occupies too much space and needs electronic parts such as transformer, stabilizer, etc. Consequently, the thickness of the conventional emergency exit light can't be reduced. It not only occupies much space, but also destroys the style of the original decoration. In addition, it is presented only in a flat manner and not in a projecting way. Another emergency exit light, as disclosed in Taiwan Pat. No. 317351, is presented in a side-projecting manner. However, it also uses the fluorescent lamp which occupies space so that the thickness of the circuit box can't also be reduced and the above-mentioned disadvantages are still present. In addition, the life of the fluorescent lamp is short, and it is unsafe because it will produce heat in using for a long time.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide an emergency exit light whose thickness is considerably reduced in order not to occupy much space and not to destroy the style of the decoration.
It is another object of the present invention to provide an emergency exit light in which LED in series connection are used as projecting light source so that it can reach the indicating, light and clear effect.
It is a further object of the present invention to provide an emergency exit light which can be used for a long time and hardly produces heat so that a safe requirement can be reached.
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Pham Toan
Rosenberg , Klein & Lee
Wu Daniel J.
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