LED light module for portable lighting

• US 20100097798A1
• Filed: 10/22/2008
• Published: 04/22/2010
• Est. Priority Date: 10/22/2008
• Status: Abandoned Application

• Current Assignee: Caltraco International Limited
• Original Assignee: Caltraco International Limited
• Inventors: YOUNG, TONY CHUNLUNG
• Application Number:
  US12/255,665
• Publication Number:
  US 20100097798A1
• Time in Patent Office: Days
• US Class Current: 362/235
• 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 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 29/506 of globes, bowls or cover glasses
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/86 Ceramics or glass
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 3/0625 the material diffusing light, e.g. translucent plastics
• 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 2107/60 on stacked substrates
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A LED light module for portable lighting which comprises a supporting base, a supporting plate, a diffusing cover, an electrical base, an axle, four round flat top single die miniature LEDs each with a light emitting angle of 100 degrees and a driving circuit disposed inside the axle and electrically connected to the LEDs. The present invention is more susceptible of low heat generation and low production costs. Moreover, since only four round flat top single die miniature LEDs are used to provide sufficient light output for an area in 360 degrees, it is more effective than the conventional portable lighting which provide spot lights only.

Claims

1. A LED light module for portable lighting which comprises a supporting base, a supporting plate, a diffusing cover, an electrical base, an axle, four round flat top single die miniature LEDs each with a light emitting angle of 100 degrees and a driving circuit disposed inside the axle and electrically connected to the LEDs.

2. The LED light module for portable lighting as in claim 1, wherein the supporting base has a central hole at the centre functioning as a channel for the connection between the single die miniature LEDs and the electrical base.

3. The LED light module for portable lighting as in claim 1, wherein the supporting plate is disposed on the top of the supporting base and has a plurality of holes for the axle being fixed on and for the terminals of the LEDs being soldered and connected through.

4. The LED light module for portable lighting as in claim 1, wherein the diffusing cover is a plastic cover of matt finishing, and it has a perforation at its top.

5. The LED light module for portable lighting as in claim 1, wherein the electrical base is an Edison or a bayonet or bipin base for connecting to the battery power source of portable lighting.

6. The LED light module for portable lighting as in claim 1, wherein the axle is a square shaft with one end fixed into the corresponding holes of the supporting plate and the other end open pointing at the perforation of the diffusing cover for ease of heat dissipation.

7. The LED light module for portable lighting as in claim 1, wherein the length of the axle is longer than the length of one single die miniature LED so that the LEDs can be mounted near the open pointing end leaving room at the bottom end for heat dissipation and avoiding the light emitted by the LEDs being blocked by the supporting base.

8. The LED light module for portable lighting as in claim 1, wherein the axle takes the form of one elementary square column, the elementary square column has at least one leg for engaging with corresponding holes on the supporting plate, four pairs of holes opened on the top of the elementary square column for mounting of the single die miniature LED and a depression at the centre of the top surface.

9. The LED light module for portable lighting as in claim 8, wherein the axle is further formed by at least one supplementary square column disposed on top of each other and disposed on top of the elementary square column, each of the supplementary square column has one leg for engaging with the corresponding depression on the elementary square column or the supplementary square column disposed below thereof, four pairs of holes opened on the top of the supplementary square column for mounting of the single die miniature LEDs and a depression at the centre of the top surface.

10. The LED light module for portable lighting as in claim 1, wherein the axle is formed by engaging four rectangular mounting pieces, each of which has teeth on its two longitudinal sides for meshing with teeth of the neighboring pieces one on each side to form a hollow square shaft,

11. The LED light module for portable lighting as in claim 10, wherein each mounting piece has at least a pair of holes for the mounting of the single die miniature LED.

12. The LED light module for portable lighting as in claim 1, wherein the axle is manufactured as a whole.

13. The LED light module for portable lighting as in claim 12, wherein each mounting piece has at least a pair of holes for the mounting of the single die miniature LED.

14. The LED light module for portable lighting as in claim 1, wherein the four round flat top single die miniature LEDs each with a light emitting angle of 100 degrees are disposed one on each of the four mounting pieces of the axle near its open pointing end with the two terminals of each LED being soldered and connected through the holes on the respective mounting pieces to the circuit in parallel at the back of the respective mounting pieces.

15. The LED light module for portable lighting as in claim 1, wherein the diffusing cover is securely fixed onto the supporting base for safety purpose by thermal compression or by adhering the diffusing cover onto the supporting plate.

16. The LED light module for portable lighting as in claim 1, wherein the diffusing cover is removably engaged with the supporting base by means of engaging flanges.

17. The LED light module for portable lighting as in claim 1, wherein the round flat top single die miniature LEDs are added in four or in any multiple of four, a second set four LEDs are disposed underneath the first four LEDs with the first four LEDs being nearest to the open pointing end of the axle.

18. The LED light module for portable lighting as in claim 17, wherein a third set four LEDs are disposed underneath the second set.

19. The LED light module for portable lighting as in claim 1, wherein the diffusing cover is in different color.

20. The LED light module for portable lighting as in claim 1, wherein the diffusing cover is made of hard plastic materials good at heat dissipation such as polystyrene.