LIGHT EMITTING DEVICE AND LUMINAIRE

• US 20120002435A1
• Filed: 03/08/2010
• Published: 01/05/2012
• Est. Priority Date: 03/12/2009
• Status: Active Grant

• Current Assignee: Philips Lighting Holding BV (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Van Gorkom, Ramon Pascal, Van Oers, Denis Joseph Carel
• Granted Patent: US 8,622,598 B2
• Time in Patent Office: Days
• US Class Current: 362/551
• CPC Class Codes: F21V 14/04 by movement of reflectors in vehicle head lamps F21S41/675
• CPC Class Codes: F21V 17/02 with provision for adjustment F21V17/04 - F21V17/08 take precedence
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0008 the light being emitted at the end of the fibre

Abstract

This invention relates to a light emitting device (100) having a movable collimating unit for adjusting the output direction of light being emitted from the light emitting device. The light emitting device comprises a base unit (110), and a light output unit (120) which is engaged with the base unit. The light output unit comprises at least one light source (121) for emitting light. The light emitting device further comprises a movably arranged collimating unit (130) for adjusting the direction of the emitted light, which is arranged such that it encompasses a light output portion (125), which is arranged on the light output unit.

Claims

1. A light emitting device comprising:

a base unit;

a light output unit being engaged with said base unit, said light output unit comprising at least one light source for emitting light; and

a movably arranged collimating unit for adjusting the direction of the emitted light;

wherein said light output unit comprises a light output portion for outputting light emitted from said light source, and wherein said collimating unit is arranged to encompass said light output portion.

2. A light emitting device according to claim 1, wherein said light output portion is distanced from said base unit.

3. A light emitting device according to claim 1, wherein said collimating unit is arranged to be tiltable with respect to said light output unit and said base unit, and wherein, in combination, said collimating unit, said base unit, and said light output unit are arranged to be rotatable.

4. A light emitting device according to claim 1, wherein said collimating unit is one of truncated cone, cylinder shaped, square shaped, and triangular.

5. A light emitting device according to claim 1, wherein said base unit comprises a heat sink arranged for dissipating heat from said at least one light source.

6. A light emitting device according to claim 1, wherein said light output unit further comprises a mixing rod having a first end arranged at said at least one light source, and a second end forming said light output portion.

7. A light emitting device according to claim 6, wherein said second end is arranged to be one of cone shaped, pyramid shaped, and facetted.

8. A light emitting device according to claim 1, further comprising a light source fixture onto which said at least one light source is arranged, wherein said light source fixture is arranged to form said light output portion.

9. A light emitting device according to claim 8, wherein a plurality of said light sources are rotational symmetrically arranged on said light source fixture.

10. A light emitting device according to claim 8, wherein a plurality of said light sources are arranged at least partly covering a surface of the light source fixture, wherein said light source fixture is arranged having the shape of one of a sphere, a pyramid, a rectangle, and a cone.

11. A light emitting device according to claim 1, wherein said movably arranged collimating unit defines an aperture providing an optionally asymmetric predefined path for the movement of said collimating unit.

12. A light emitting device according to claim 11, further comprising a reflector arranged at said base unit.

13. A light emitting device according claim 11, further comprising a control unit for controlling the movement of said collimating unit, the amount of light, or the color of the light from said light emitting device, or combinations thereof.

14. A light emitting device according to claim 1, wherein said base unit is arranged to be shifted during movement of the collimating unit for adjusting the direction of the emitted light.

15. A luminaire or lamp comprising at least one light emitting device according to claim 1.