Vehcile headlamp with both low-beam and high-beam and devoid of moving parts
DRIVE
November 20, 2013
A headlight produces low-beam and high-beam outputs without requiring moving parts. Low-beam LED array (7) near first focus (F1) of ellipsoidal reflector (3) directs light laterally against reflector (3) which directs it toward second focus (F2) of reflector. Cut-off edge (4; 5; 63) near second focus forms a bright/dark edge in low-beam output. Cut-off edge is a vertically-oriented light baffle (4) whose top edge forms the bright/dark edge. Cut-off edge is a horizontal light occluding member (16) whose front edge (63) forms bright/dark edge. Cut-off edge is a corner of a heat sink (200). Cut-off edge is located near focal point of lens (2) which transmits low-beam output with a bright/dark edge. Stationary folding mirror (5) near second focus of reflector directs light from high-beam LED array (8) to lens (2). Additive light reflecting from folding mirror (5) transmitting through lens (2) forms high-beam output lacking a bright/dark edge.
Discussion in the ATmosphere