LIGHT EMITTING MODULE AND LIGHTING APPARATUS HAVING THE SAME

• US 20150108517A1
• Filed: 12/10/2013
• Published: 04/23/2015
• Est. Priority Date: 10/18/2013
• Status: Active Grant

• Current Assignee: Glow One Company Ltd.
• Original Assignee: Posco Led Company Ltd. (TMS Co., Ltd.)
• Inventors: YOON, Seong Bok, KIM, Dae Won
• Granted Patent: US 9,117,733 B2
• Time in Patent Office: Days
• US Class Current: 257/91
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• 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 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H05B 45/40 Details of LED load circuits

Abstract

A light emitting module according to an exemplary embodiment of the present invention includes a printed circuit board (PCB) and first through m-th lighting blocks (‘m’ is an integer greater than one). The PCB has wiring patterns electrically connecting optical semiconductor devices. The first through the m-th lighting blocks are disposed on the PCB and configured to generate light. Each of the first through the m-th lighting blocks includes first through n-th lighting groups (each block includes at least one group), each of which includes optical semiconductor devices disposed on the PCB, and an electric currents configured to flow through each lighting group is substantially the same.

Claims

1. A light emitting module, comprising:

a printed circuit board (PCB) comprising wiring patterns electrically connecting optical semiconductor devices; and

first through m-th lighting blocks of optical semiconductor devices disposed on the PCB and configured to generate light,

wherein ‘

m’

is an integer greater than one, and

wherein each of the first through the m-th lighting blocks comprises first through n-th lighting groups, wherein each block comprises at least one group, each of the first through n-th lighting groups comprises optical semiconductor devices disposed on the PCB, and an electric current configured to flow through each of the first through n-th lighting group is substantially ii the same.

2. The light emitting module of claim 1, wherein the first through the n-th lighting groups of each of the first through the m-th lighting blocks are electrically connected with each other in series.

3. The light emitting module of claim 1, wherein the optical semiconductor devices in each of the first through the n-th lighting groups of each of the first through the m-th lighting blocks are electrically connected with each other in parallel.

4. The light emitting module of claim 2, wherein a last lighting group of a (k−

1)-th lighting block, wherein ‘

k’

is an integer, and 2≦

k≦

m, is electrically connected with a first lighting group of a k-th lighting block in series.

5. The light emitting module of claim 1, wherein each of the lighting groups comprises the same number of optical semiconductor devices.

6. The light emitting module of claim 1, wherein the PCB comprises a plus connector and a minus connector configured to provide the optical semiconductor devices with electric power.

7. The light emitting module of claim 6, wherein a first lighting group of the first lighting block is electrically connected to the plus connector and a last lighting group of the m-th lighting block is electrically connected to the minus connector.

8. The light emitting module of claim 1, wherein the PCB comprises ‘

m’

number of elbows and a body connecting the elbows, and each elbow respectively corresponds to the first through the m-th lighting blocks.

9. The light emitting module of claim 1, wherein the PCB comprises a pair of bodies spaced apart from each other and ‘

m’

number of elbows connecting the pair of bodies, and each elbow respectively corresponds to the first through the m-th lighting blocks.

10. The light emitting block of claim 9, wherein a last lighting group of an i-th elbow is electrically connected to a last lighting group of an (i+1)-th elbow, wherein ‘

i’

is an odd number smaller than ‘

m’

, and

a first lighting group of j-th elbow is electrically connected to a first lighting group of an (j+1)-th elbow, wherein ‘

j’

is an even number smaller than ‘

m’

.

11. A lighting apparatus, comprising:

a base plate having a rectangular shape; and

a light emitting module comprising a printed circuit board (PCB) disposed on the base plate and optical semiconductor devices disposed on the PCB, the PCB comprising a body and ‘

m’

number of elbows integrally formed with the body,

wherein ‘

m’

is an integer greater than one,

wherein the ‘

m’

number of elbows are spaced apart with opening portions respectively interposed therebetween so that the elbows and the opening portions are alternately disposed,

wherein each of the elbows comprises ‘

n’

number of lighting groups, each of the lighting groups comprising the same number of optical semiconductor devices, and

wherein an electric current configured to flow through each lighting group is substantially the same.

12. The lighting apparatus of claim 11, wherein the lighting groups are electrically connected with each other in series.

13. The lighting apparatus of claim 12, wherein the optical semiconductor devices in each of the lighting groups are electrically connected with each other in parallel.

14. The lighting apparatus of claim 13, wherein a last lighting group of a (k−

1)-th elbow, wherein ‘

k’

is an integer, and 2≦

k≦

m, is electrically connected with a first lighting group of a k-th elbow in series.

15. The lighting apparatus of claim 13, wherein a last lighting group of an i-th elbow is electrically connected to a last lighting group of an (i+1)-th elbow, wherein ‘

i’

is an odd number smaller than ‘

m’

, and

a first lighting group of j-th elbow is electrically connected to a first lighting group of an (j+1)-th elbow, wherein T is an even number smaller than ‘

m’

.

16. The lighting apparatus of claim 11, wherein the body is disposed in parallel with an edge portion of the base plate, and comprises at least one connector.

17. The lighting apparatus of claim 11, wherein the ‘

m’

number of elbows are disposed in parallel with an edge portion of the base plate, and one of the elbows comprises at least one connector.

18. The lighting apparatus of claim 11, wherein a white or silver colored material having a high optical reflectivity is disposed on the base plate.

19. The lighting apparatus of claim 11, further comprising a power supply disposed on a first surface of the base plate opposite to a second surface on which the PCB is disposed.

20. The lighting apparatus of claim 11, further comprising an optical cover combined with the base plate to diffuse light generated by the optical semiconductor devices.