Light emitting device

Patent metadata

Field	Value
Publication number	US-2016109102-A1
Application number	US-201514792842-A
Country	US
Kind code	A1
Filing date	Jul 7, 2015
Priority date	Oct 21, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A light emitting device includes: a plurality of light emitting modules each provided with a circuit board, and first to n-th light source groups disposed on the circuit board, n being an integer greater than two, wherein the first to n-th light source groups each include at least one light emitting diode (LED); a driving module supplying driving power to the plurality of light emitting modules, and determine a number of light source groups operating in each of the plurality of light emitting modules based on a level of the driving power; and a module connection unit connecting first to n-th light source groups provided in one of the plurality of light emitting modules and first to n-th light source groups provided in another light emitting module in parallel in a detachable manner, respectively.

First claim

What is claimed is:

1 . A light emitting device comprising:
a plurality of light emitting modules each provided with a circuit board, and first to n-th light source groups disposed on the circuit board, n being an integer greater than two, wherein the first to n-th light source groups each comprise at least one light emitting diode (LED); a driving module configured to supply driving power to the plurality of light emitting modules, and determine a number of light source groups operating in each of the plurality of light emitting modules based on a level of the driving power; and a module connection unit configured to connect first to n-th light source groups provided in one of the plurality of light emitting modules to first to n-th light source groups provided in another light emitting module in parallel in a detachable manner, respectively.

2 . The light emitting device of claim 1 , wherein the circuit boards provided in the plurality of light emitting modules, respectively, are physically separated from one another.

3 . The light emitting device of claim 1 , wherein the circuit board provided in each of the plurality of light emitting modules comprises a wiring pattern, and
wherein the first to n-th light source groups provided in each of the plurality of light emitting modules are electrically connected to one another by the wiring pattern.

4 . The light emitting device of claim 3 , wherein the module connection unit comprises a connector disposed on the circuit board provided in each of the plurality of light emitting modules, and electrically connected to the wiring pattern provided on the circuit board.

5 . The light emitting device of claim 4 , wherein the connector comprises a plurality of connectors disposed on the circuit board provided in each of the plurality of light emitting modules.

6 . The light emitting device of claim 4 , wherein the connector is disposed adjacently to an edge of the circuit board provided in each of the plurality of light emitting modules.

7 . The light emitting device of claim 2 , wherein the circuit board provided in each of the plurality of light emitting modules has a surface on which light source groups provided in each of the plurality of light emitting modules are disposed, and the surface has a polygonal shape.

8 . The light emitting device of claim 7 , wherein the surface has a regular polygonal shape.

9 . The light emitting device of claim 7 , wherein the circuit boards provided in the plurality of light emitting modules, respectively, have substantially identical shapes to one another.

10 . The light emitting device of claim 7 , wherein the circuit boards provided in the plurality of light emitting modules, respectively, are arranged in a honeycomb structure.

11 . The light emitting device of claim 1 , wherein the driving module comprises a controller configured to control a path of currents applied to the plurality of light emitting modules and flowing to a ground, based on the level of the driving power.

12 . The light emitting device of claim 1 , wherein the first to n-th light source groups provided in each of the plurality of light emitting modules are connected to one another in series.

13 . The light emitting device of claim 12 , wherein at least one of the plurality of light emitting modules further includes a resistor unit connected to the first to n-th light source groups in series.

14 . The light emitting device of claim 1 , wherein the driving module is disposed on the circuit board provided in one of the plurality of light emitting modules.

15 . A light emitting device comprising:
a plurality of light emitting modules each comprising first to n-th light source groups, n being an integer greater than two, and physically separated from one another; a driving module configured to supply driving power to the plurality of light emitting modules, and determine a number of light source groups operating in each of the plurality of light emitting modules, based on a level of the driving power; and a module connection unit configured to connect the first to n-th light source groups provided in each of the plurality of light emitting modules to first to n-th light source groups provided in an adjacent light emitting module in parallel in a detachable manner, respectively.

16 . A light emitting device comprising:
at least one light emitting module comprising a plurality of light source groups, each comprising at least one light source; and a driving module configured to control turn-on and turn-off of the light source groups based on a level of power input to the driving module, wherein the driving module is configured to turn on a different number of the light source groups as the level of the input power is changed.

17 . The light emitting device of claim 16 , wherein the at least one light emitting module comprises a plurality of light emitting modules connected to one another, each comprising a plurality of light source groups, and
wherein, as the level of the input power is changed, the driving module is configured to turn on the different number of the light source groups in each of the light emitting modules.

18 . The light emitting device of claim 17 , wherein, as the level of the input power is in a selected range, the driving module is configured to turn on the same number of light source groups in the light emitting modules, respectively.

19 . The light emitting device of claim 17 , wherein at least one of the plurality of light emitting modules and the driving module is disposed on a same circuit board, and the other light emitting modules are disposed on at least one different circuit board and detachably connected to the single circuit board.

20 . The light emitting device of claim 16 , further comprising a detector configured to detect the level of the input power.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Hyun Jung

Classifications

• F21V23/005

  the substrate is supporting also the light source · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21Y2105/16

  square or rectangular, e.g. for light panels · CPC title

• F21V21/005 Primary

  for several lighting devices in an end-to-end arrangement, i.e. light tracks · CPC title

• H05B47/10 Primary

  Controlling the light source · CPC title