Lamp Device

• US 20110058379A1
• Filed: 04/30/2009
• Published: 03/10/2011
• Est. Priority Date: 05/08/2008
• Status: Active Grant

• Current Assignee: Lok-F GmbH
• Original Assignee: Lok-F GmbH
• Inventors: Diamantidis, Georg
• Granted Patent: US 8,456,077 B2
• Time in Patent Office: Days
• US Class Current: 362/296.01
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/52 Encapsulations

Abstract

A lamp device comprising illuminant, which emits a primary radiation on applying a voltage thereto and solid particles, at least partly enclosing the illuminant and which interact with the primary radiation. The particle number density changes in at least one direction away from the illuminant from a first particle number density to a second particle number density.

Claims

1. A lamp device comprising:

a) illuminants, which emit a primary radiation when voltage is applied to them;

b) solid particles, which at least partly enclose the illuminants and which interact with the primary radiation;

wherein characterized in that c) a particle number density of the solid particles changes in at least one direction away from the illuminants from a first particle number density to a second particle number density.

2. The lamp device of claim 1, wherein the solid particles include luminous material particles which absorb primary radiation and emit secondary radiation, and/or reflection particles, in particular barium sulfide, barium sulfite, barium sulfate or titanium dioxide particles.

3. The lamp device of claim 2, wherein the change of particle number density is a reduction.

5. The lamp device of claim 2, wherein

a) a greatest particle number density is present in a first region, which is arranged closest to the illuminants compared with other regions;

b) a smallest particle number density is present in a second region, which is furthest from the illuminants compared with other regions.

6. The lamp device of claim 5, wherein the greatest particle number density is 5 to 10,000 times.

7. The lamp device of claim 5, wherein

a) the greatest particle number density is between 500 and 20,000 particles per cubic centimetre;

and,

b) the smallest particle number density is between 2 and 5,000 particles per cubic centimetre.

8. The lamp device of claim 2, wherein the solid particles are held in their position relative to the illuminants by a carrier medium.

9. The lamp device of claim 8, wherein the carrier medium is a silicone material or a resin.

10. The lamp device of claim 8, wherein the carrier medium with the particles occupies a cylindrical, conical or hemispherical volume, or a volume which includes a section which is in the form of a truncated cone and blends into a spherical section, or an approximately U-shaped volume.

11. The lamp device of claim 8, wherein the carrier medium with the particles is arranged in a chamber of the lamp device.

12. The lamp device of claim 11, wherein regions of a chamber wall is made of glass or synthetic material.

13. The lamp device of claim 8, wherein multiple air bubbles are provided in the carrier medium.

14. The lamp device of claim 13, wherein a concentration of air bubbles in the carrier medium has a value of 500 to 20,000 air bubbles per cm³.

15. The lamp device of claim 13, wherein the air bubbles have a diameter of 0.1 mm to 2 mm.

16. The lamp device of claim 8, further comprising:

multiple volumes which are determined by the carrier medium with the solid particles, and which are arranged at a distance from each other.

17. The lamp device of claim 16, further comprising two volumes.

18. The lamp device of claim 16, further comprising three volumes.

19. The lamp device of claim 16, the volumes are provided in multiple receiving regions of a light source.

20. The lamp device of claim 19, wherein the light source is cylindrical and the receiving regions are in the form of channels parallel to an axis of the light source.

21. The lamp device of claim 1, wherein the illuminants include at least one semiconductor structure which emits light when voltage is applied to it.

22. The lamp device of claim 21, wherein the at least one light-emitting semiconductor structure emits blue light when voltage is applied to it.

23. The lamp device of claim 21, wherein the illuminants include at least one red light semiconductor structure, at least one green light semiconductor structure and at least one blue light semiconductor structure.

24. The lamp device of claim 21, wherein the illuminants include at least one infrared semiconductor structure and/or at least one ultraviolet semiconductor structure.

25. The lamp device of claim 21, wherein there are at least three layers in which the solid particles are present with different particle number densities.

4. The lamp device of 3, wherein the particle number density is reduced evenly.