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    • 47. 发明专利
    • HEADLIGHT FOR AUTOMOBILE
    • JPH10308106A
    • 1998-11-17
    • JP6503798
    • 1998-03-16
    • AUTOPAL SLO
    • CEJNEK MILANKUTAC MARTINKRIZAK MILAN
    • F21S8/10B60Q1/04B60Q1/16F21V7/00F21V7/09F21V13/04F21M3/08
    • PROBLEM TO BE SOLVED: To improve illumination to a space of nearer road boundary line and light guidance of a driver, and reduce a condition of dazzling drivers of cars on the opposite lane by constituting so that an inclination of facets to a vertical line of headlights, an extinction light source, diffusion of a light beam and widths of the facets respectively satisfy specific expressions. SOLUTION: Headlights 1 and 2 have facets 11, 12, 21 and 22 in the shape of a parabolic column forming profiles B and C above a horizontal line (z). In the case of the headlight 1, gradients to a vertical line (y) are α11 and α12 , and gradients in the case of the headlight 2 are α21 and α22 , and respectively satisfy expressions I and II. An extinction light source is also set so that a surface of its light source becomes a prescribed distance Δf from a focus of a reflector, and satisfies expression III. In diffusion of a light beam, the size relationship between obliquely upward diffusions β and εand obliquely downward diffusions γ and δ satisfies expression IV, and facet widths w11 and w12 of the headlight 1 and facet widths w21 and w22 also satisfy expression V.