ASSEMBLY OF LIGHT-EMITTING UNITS

• US 20090230833A1
• Filed: 03/12/2009
• Published: 09/17/2009
• Est. Priority Date: 03/14/2008
• Status: Active Grant

• Current Assignee: Chao-Jen Wang, Hsueh-Chung Kao
• Original Assignee: Chao-Jen Wang, Hsueh-Chung Kao
• Inventors: WANG, Chao-Jen, KAO, Hsueh-Chung
• Granted Patent: US 8,106,568 B2
• Time in Patent Office: Days
• US Class Current: 313/1
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• 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 2107/10 on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
• 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]

Abstract

Disclosed is an assembly of light-emitting units, which is applicable to a lighting device that comprises a plurality of light-emitting elements respectively mounted to heat dissipation units. The light-emitting elements give off light beams that project outward through a light-transmitting hood. One surface of the light-transmitting hood is provided with a light diffusion layer featuring light refraction. As such, the light beams emitting from the light-emitting elements are made converging on a light incidence area, which, together with the feature of light spreading of the light-transmitting hood, can spread off and thus homogenize the light beams to form a surface source, and can also concentrate the light energy of the lighting device to enhance the brightness. The lighting device can be applied to any lighting facility.

Claims

1. A lighting device comprising:

at least one light-emitting element, each of which is arranged at a different angle inside the lighting device and projects a light beam that converges at an incidence focusing spot and covers a light incidence area;

a heat dissipation unit comprising a heat dissipative structure to which the light-emitting element is mounted and which functions to dissipate and transmit heat generated by the light-emitting element; and

a light-transmitting hood, which is set at below the light-emitting element and has a surface on which a light diffusion layer featuring light refraction to make a light exit area showing an output resembling a surface source.

2. The lighting device according to claim 1, wherein the lighting device comprises more than one heat dissipation elements.

3. The lighting device according to claim 1, wherein the heat dissipation unit comprises heat dissipation fins.

4. The lighting device according to claim 1, wherein the heat dissipation unit is coupled to an enhanced heat dissipater.

5. The lighting device according to claim 1, wherein the heat dissipation unit comprises fastening sections.

6. The lighting device according to claim 1, wherein the lighting device is applied to a lamp bulb, a desk lamp, and a projection light.

7. The lighting device according to claim 6, wherein the light-transmitting hood comprises a concave lens corresponding to the light incidence area of the light-emitting element.

8. The lighting device according to claim 6, wherein the light-transmitting hood comprises a convex lens corresponding to the light exit area of the light-emitting element.

9. The lighting device according to claim 1, wherein the light-emitting element comprises a light-emitting diode.

10. The lighting device according to claim 1, wherein the lighting device comprises a plurality of light-emitting elements, which comprise a combination of identical power or different powers.

11. The lighting device according to claim 1, wherein the lighting device comprises a plurality of light-emitting elements, which comprise a combination of identical color temperature or different color temperatures.