Title:
LED灯具
Document Type and Number:
Japanese Patent JP4452391
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the appearance of a vehicular LED(light emitting diode) lamp fitting which does not generate uneven light and does not give a looker uncomfortable feeling. SOLUTION: In the vehicular LED lamp fitting, a plurality of LED lamps 2 are provided, and a light source unit 3 which converges the light from the LED lamps 2 on a pseudo-focus f1 is formed. On a center axis X, the second focus of a hyperbola having the pseudo-focus f1 as its first focus is placed, and a hyperboloid of revolution reflection surface 4 having its focus at the second focus is determined. Furthermore, a paraboloid of revolution reflection surface 5 having the second focus f2 as its focus is determined. The lights from a plurality of LED lamps 2 are converged by the light source unit 3 on the pseudo focus f1, and is mode incident on the hyperboloid of revolution reflection surface 5 after its illumination angle is expanded by the paraboloid of revolution reflection surface. Thus a lighting condition equal to that of incandescent lamp is achieved on the surface of a lens 6.
Inventors:
Toshiyuki Kondo
Hidetaka Okada
Hidetaka Okada
Application Number:
JP2000289205A
Publication Date:
April 21, 2010
Filing Date:
September 22, 2000
Export Citation:
Assignee:
Stanley Electric Co., Ltd.
International Classes:
F21S8/10; F21W101/12; F21W101/14; F21Y101/02
Domestic Patent References:
| JP4829283A | ||||
| JP6292505U | ||||
| JP6283003A |
Attorney, Agent or Firm:
Teruo Akimoto