Patent ID: 7980738
Filing Date: 2011-07-19
Classification: F21V,F21W,F21Y,Y10S

Abstract:
1. A multi-source shadowless operating lamp comprising: a central base, a light field being defined below the central base and extending perpendicular to the central base; a link element received in the central base; and a plurality of spotlights mounted on a peripheral of the central base and spaced a distance apart from each other, each spotlight defining a light focus spot through the light field, the focus spots exactly passing the same height in the light field, each spotlight including: a lamp shell connecting with the central base; a dissipation substrate accommodated in the lamp shell, a pivot portion being formed on an end of the dissipation substrate and near the central base for pivoting to the link element, a lock portion being formed on another end of the dissipation substrate for locking with the lamp shell, the dissipation substrate defining a plurality of slots in a bottom thereof, each slot having a mount surface on a bottom thereof, the mount surface having an extending line extending perpendicular thereto and through the focus spot of the spotlight; and a plurality of LED (Light Emitting Diode) sets mounted on the mount surfaces of the dissipation substrate and corresponding to the extending lines of the mount surfaces, the LED sets at different positions respectively casting light to the focus spot; wherein an angle between the dissipation substrate and the light shell is adjustable to change positions of the focus spot of the spotlight relative to the light field, the link element bringing the focus spots of the spotlights to change height relative to the light field, making the focus spots of the spotlights be positioned at the same height in the light field.