Illumination – Supported by vehicle structure – Light modifier
Reexamination Certificate
2001-08-24
2003-05-06
O'Shea, Sandra (Department: 2875)
Illumination
Supported by vehicle structure
Light modifier
C362S346000, C362S517000, C362S303000, C362S305000
Reexamination Certificate
active
06558032
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composition of a lighting equipment for vehicle adopting one or a plurality of LED lamps as light source, and more precisely, has an object to provide a composition allowing to prevent irregular brightness over the light emitting surface that appears frequently when the LED lamp is adopted as light source from occurring.
2. Detailed Description of the Prior Art
FIG. 6
shown an example of composition of a conventional LED lighting equipment
90
for vehicle, wherein an LED lamp
92
is fitted to each of individual reflector portion
91
a
, of a base plate
91
where a plurality of reflector portions
91
for example as surface of paraboloid of rotation are formed, and further, the front of said LED lamp
92
is covered with a lens
93
provided with a lens cut
93
a
corresponding to each of individual reflector portion
91
a.
In such a composition, the direct light from the LED lamp
92
and the light reflected from said reflector portion
91
a
are incident to said lens cut
93
a
and, it is expected that the whole surface of the lens
93
shines with an approximately even brightness by the effect of the lens cut
93
a
for diffusing these light conveniently.
However, in the LED lighting equipment
90
for vehicle of said conventional composition, the adopted LED lamp
92
is, for instance, a LED chip of 0.3 mm square that can substantially taken as a point light source, covered with a resin lens serving also as case and, there, as said resin lens is formed in a convex lens having its focus near the LED chip, the light emitted from the LED lamp
92
is highly converged, presenting a narrow irradiation angle (for instance 30° to 50° in half value of the brightness).
Therefore, light attains rarely to said reflector portion
91
a
and, substantially, only the direct light from the LED lamp
92
passes through the lens
93
and reaches at the viewer, and a luminescence irregularity appears over the light emitting surface (namely on the lens
93
surface) as shown in
FIG. 7
, deteriorating the appearance.
In order to solve this problem, the radiation angle of respective LED lamps
92
may be overlapped each other, by reducing the LED lamp
92
arrangement distance, or increasing the depth of the LED lighting equipment for vehicle; however, if the distance is reduced, the necessary number of LED lamps
92
for the same light emitting surface, resulting in increase of cost, power consumption, temperature when turned on, or other problems, and if the depth is increased, the size also increasing, making difficult to load on a vehicle and causing other new problems.
SUMMARY OF THE INVENTION
The present invention solves the problems by providing, as a concrete means for solving the aforementioned conventional problems, a LED lighting equipment for vehicle, comprising at least one light emitting unit wherein an LED lamp is disposed approximately at the focus of one hyperboloid, a reflection surface of hyperboloid defined by the other hyperboloid comprising a transmission portion disposed in an appropriate range near an optical axis is arranged in the LED lamp optical axial direction, and a refection surface of paraboloid of revolution having the approximate focus at the focus of said the other hyperboloid focus is arranged at the side of said LED lamp.
REFERENCES:
patent: 4814950 (1989-03-01), Nakata
patent: 5639153 (1997-06-01), Bibbiani et al.
patent: 5967647 (1999-10-01), Eichler
patent: 6129447 (2000-10-01), Futami
patent: 6270241 (2001-08-01), Collot et al.
patent: 6334700 (2002-01-01), Ramer et al.
patent: 6402356 (2002-06-01), Gotou
patent: 6485170 (2002-11-01), Natsume
patent: 6502964 (2003-01-01), Simon
Kondo Toshiyuki
Okada Hidetaka
O'Shea Sandra
Stanley Electric Co. Ltd.
Ton Anabel
Weingarten Schurgin, Gagnebin & Lebovici LLP
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