×

Light-distributing lens of head lamp for vehicles

  • US 5,921,671 A
  • Filed: 10/18/1996
  • Issued: 07/13/1999
  • Est. Priority Date: 10/18/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A wide-spread zone-forming lens for a head lamp of a vehicle, comprising:

  • an entrance surface receiving light from a light source;

    an exit surface emitting light entering said entrance surface, said exit surface formed opposite said entrance surface along a horizontal line extending in a lengthwise direction of said wide-spread zone-forming lens; and

    a pair of reflecting side surfaces directing a portion of light entering said entrance surface to said exit surface by total reflection, said pair of reflecting side surfaces formed between said entrance surface and said exit surface and include at least a first and second pair of reflecting side portions arranged in a vertical direction substantially perpendicular to the horizontal line of said wide-spread zone-forming lens, said first and second pair of reflecting side portions forming a first and second light-distributed zone disposed ahead of said exit surface, wherein each said first and second light distributed zone includes,a direct light-distributed zone, defined by a portion of light transmitted directly from said entrance surface without being totally reflected by the reflecting side surfaces;

    a plurality of reflected light-distributed zones, formed on both sides of the direct light-distributed zone and defined by a portion of light transmitted from said entrance surface being totally reflected by the reflecting side surfaces; and

    a first reflecting side portion angle, formed by the respective first pair reflecting side portions along the horizontal direction of said wide-spread zone-forming lens, differing in degree from a second reflecting side portion angle, formed by the respective second pair reflecting side portions, wherein each of a plurality of dark areas formed outside and between said direct light-distributed and reflected light-distributed zones of said first light-distributed zone are brightened by one of said direct light-distributed and reflected light-distributed zones of said second light-distributed zone.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×