Light distribution control device

• US 7,241,038 B2
• Filed: 04/15/2005
• Issued: 07/10/2007
• Est. Priority Date: 10/29/2004
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Monji, Tatsuhiko, Horino, Masaya, Ohsumi, Ken, Naniwa, Irizo, Satou, Kazutaka
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): Truong; Bao Q.
• Application Number:
  US11/106,450
• Publication Number:
  US 20060092657A1
• Time in Patent Office: 816 Days
• Field of Search: 362543-545, 362523-532, 362512-515, 362/238, 362/239, 362/250, 362/476, 362/198, 362/232, 362/242, 362/243, 362/236, 362/241, 362/283, 362285-289, 362/420, 362/449, 362/418, 362/419, 362/422, 362/425, 362/426
• US Class Current: 362/525
• CPC Class Codes: B60Q 1/08 automatically
• CPC Class Codes: F21S 41/675 by moving reflectors

Abstract

In this light distribution control device in order to provide a vehicular lighting fixture for an Adaptive Frontlighting System (AFS) in which a lot of light distribution patterns can be set without making the entire lighting fixture larger, beams which link said movable substrates to said inner frames and beams which link said inner frames to said outer frame are mutually orthogonal, and a light distribution pattern is set by deforming under torsion the beams which link said movable substrates to said inner frames and the beams which link said inner frames to said outer frame, and swinging each of said movable substrates with respect to said outer frame in the biaxial directions independently.

Claims

1. A light distribution control device of vehicular lighting fixture comprising;

a plurality of movable substrates where illuminants are arranged,

a plurality of inner frames,

an outer frame,

a plurality of beams which link said movable substrates to said inner frames, and

a plurality of beams which link said inner frames to said outer frame,

wherein the beams which link said movable substrates to said inner frames and the beams which link said inner frames to said outer frame are mutually orthogonal, and

wherein a light distribution pattern is set by deforming under torsion the beams which link said movable substrates to said inner frames and the beams which link said inner frames to said outer frame, and swinging each of said movable substrates with respect to said outer frame in the biaxial directions independently.