Patent ID: 7384176
Filing Date: 2008-06-10
Classification: F21S,F21Y,H01L

Abstract:
1. A vehicular headlamp comprising: an optical system comprising at least one of a reflector and a lens; and a semiconductor light-emitting device comprising at least one semiconductor light-emitting element for forming a first illuminating beam and at least one semiconductor light-emitting element for forming a second illuminating beam, wherein: said illuminating beams are switchable by selectively activating selected ones of said light-emitting elements for forming said first and second illuminating beams; said first illuminating beam is a high beam and said second illuminating beam is a low beam; each of said light-emitting elements has a horizontally elongated shape, extending in a horizontal direction orthogonal to an optical axis of said light-emitting device, and a light distribution pattern is formed by expanding a light source image of said light-emitting elements mainly in said horizontal direction with said optical system.