Automobile headlamp reflector
First Claim
Patent Images
1. An automotive headlamp reflector unit comprising:
- a one-piece light reflector with a light source mounted generally in the middle of the reflector, the reflector being formed of separate curved segments arranged to form a composite reflective surface, each segment being curved to provide an optimum light beam pattern in a predetermined direction and of a predetermined shape, with all of the light beam patterns together forming a composite beam;
and the reflector and light source are formed for mounting within headlamp support frames of different shapes and sizes for various automobiles,and wherein the separate curved segments are defined by the following form of fourth order polynomial;
space="preserve" listing-type="equation">A*Z 4+B*Z 2+C*X*Z 2+D*Y*Z 2+E*X+F*Y+G*X 2+H*Y 2+I*X*Y+J=OwhereA=1B=-2*(K 2+XO 2+YO
2)C=4*XOD=4*YOE=-4*XO*(K 2+XO 2+YO
2)+8*K 2*XOF=-4*YO*(K 2+XO 2+YO
2)+8*K 2*YOG=4*XO 2-4*K 2H=4*YO 2-4*K 2I=8*XO*YOJ =(K 2+XO 2+YO
2) 2-4*K 2* (XO 2+YO
2)K=SQRT(X 2+Yp 2+Zp
2)-SQRT((Xp-XO) 2+(Yp-YO)
2).wherein point (Xp,Yp and Zp) is an arbitrary point on the separate curved segments.
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Accused Products
Abstract
An interchangeable headlamp reflector and light bulb unit is provided which can be used as part of various automotive headlamp assemblies. The surface of the reflector is defined mathematically by considering the optical path differences between a ray of light from a light source and a ray of light from a vertical cylindrical axis. The reflector is made of a low number of individual segments that each define a certain portion of the resulting beam of light. Each segment has light rays that extend parallel to the ground and diverge horizontally, thus minimizing possible hot spots on the lens of the reflector assembly.
5 Citations
14 Claims
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1. An automotive headlamp reflector unit comprising:
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a one-piece light reflector with a light source mounted generally in the middle of the reflector, the reflector being formed of separate curved segments arranged to form a composite reflective surface, each segment being curved to provide an optimum light beam pattern in a predetermined direction and of a predetermined shape, with all of the light beam patterns together forming a composite beam; and the reflector and light source are formed for mounting within headlamp support frames of different shapes and sizes for various automobiles, and wherein the separate curved segments are defined by the following form of fourth order polynomial;
space="preserve" listing-type="equation">A*Z 4+B*Z 2+C*X*Z 2+D*Y*Z 2+E*X+F*Y+G*X 2+H*Y 2+I*X*Y+J=Owhere A=1 B=-2*(K 2+XO 2+YO
2)C=4*XO D=4*YO E=-4*XO*(K 2+XO 2+YO
2)+8*K 2*XOF=-4*YO*(K 2+XO 2+YO
2)+8*K 2*YOG=4*XO 2-4*K 2 H=4*YO 2-4*K 2 I=8*XO*YO J =(K 2+XO 2+YO
2) 2-4*K 2* (XO 2+YO
2)K=SQRT(X 2+Yp 2+Zp
2)-SQRT((Xp-XO) 2+(Yp-YO)
2).wherein point (Xp,Yp and Zp) is an arbitrary point on the separate curved segments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A headlamp reflector unit comprising:
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a one-piece light reflector formed of separate curved segments, each curved segment being adjoined to create a composite reflective surface, each composite reflective surface is defined by the equation
space="preserve" listing-type="equation">SQRT(X 2+Y 2+Z
2)-SQRT((X-XO) 2+(Y-YO)
2)=K.each segment being curved to generate a light pattern having a predetermined shape and direction, the reflector having a centrally located opening; and a light source extending through the opening and mounted generally in the middle of the reflector, the reflector and light source being formed for mounting within headlamp support frames of different shapes and sizes. - View Dependent Claims (12, 13)
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14. A headlamp assembly comprising:
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a light reflector formed of a plurality of segments, each segment being adjoined to create a reflective surface, each segment being curved to generate a light pattern having a predetermined shape in a predetermined direction, the reflector having a centrally located opening; a light source extending through the opening and mounted generally in the middle of the reflector; a set of terminals connected to the light source, the terminals being operable to deliver electricity to the light source; a lens cover spaced apart from the light source and operable to seal the reflector and light source from the environment; and a headlamp body for housing the reflector, light source and the receptacle, whereas the reflector and light source are operable to be mounted within a variety of headlamp bodies of different shapes and sizes.
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Specification