Lighting Device

• US 20110222279A1
• Filed: 05/20/2011
• Published: 09/15/2011
• Est. Priority Date: 08/19/2009
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Hwayoung, Kim, Kwang Soo, Kong, Kyung IL, Hong, Sang Jun
• Granted Patent: US 8,240,877 B2
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/033 the surface being a wall or like vertical structure, e.g. building facade
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 17/162 the parts being subjected to traction or compression, e.g. coil springs
• CPC Class Codes: F21V 19/004 by deformation of parts or snap action mountings, e.g. using clips
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Disclosed is a lighting device. The lighting device includes: a first body including a first surface; a second body including a second surface; a plurality of light emitting devices disposed on the first surface and the second surface; a coupler that is disposed at at least one of the ends of the first and the second bodies; and a limit switch connecting and is connecting electric power supplied to the plurality of the light emitting diodes in accordance with change of a distance between the first body and the second body.

Claims

1. A lighting device comprising:

a first body including a first surface and one or more ends;

a second body including a second surface and one or more ends;

a plurality of light emitting diodes disposed on the first surface and the second surface;

a coupler that is disposed at one or more of the ends of the first and the second bodies; and

a limit switch connecting and disconnecting electric power supplied to the plurality of the light emitting diodes in accordance with change of a distance between the first body and the second body.

2. The lighting device of claim 1, further comprising a middle body being disposed between the first body and the second body and including a connection terminal and one or more ends,

wherein at least one groove is formed at one or more ends of the first body, the second body and the middle body, respectively,

wherein the coupler includes at least three protrusions formed therein which are inserted into the grooves formed on the ends of the first body, the second body and the middle body,

wherein the one groove of the first body is coupled to one of the protrusions of the coupler,

and wherein the one groove of the second body is coupled to another of the protrusions of the coupler.

3. The lighting device of claim 2, wherein the limit switch is a mechanical switch and the limit switch electrically isolates the connection terminal from the plurality of the light emitting diodes by disconnecting the electrical connection between the middle body and the first body and the electrical connection between the middle body and the second body.

4. A lighting device comprising:

a housing;

a light source unit;

a coupling member being coupled to the housing and including an insertion groove; and

at least one reflector placed between the housing and the coupling member,

wherein the light source unit includes;

a first body including a first coupling unit coupled to the coupling member and including a first surface inclined toward the reflector;

a plurality of light emitting diodes disposed on the first surface;

a third body electrically connected to the first body; and

a limit switch connecting and disconnecting electric power supplied to the plurality of the light emitting diodes in accordance with a change in a distance between the first body and the third body.

5. The lighting device of claim 4, wherein a first connection terminal is disposed within the insertion groove, and wherein the third body comprises at least one of a second body symmetrical to the first body and/or a middle body in which a second connection terminal electrically connected to the first connection terminal is disposed.

6. The lighting device of claim 4, further comprising a coupler that is disposed at at one or more ends of the first body and the third body, respectively.

7. The lighting device of claim 6, wherein a first connection terminal is disposed within the insertion groove,

wherein the third body comprises a second body symmetrical to the first body and a middle body in which a second connection terminal electrically connected to the first connection terminal is disposed,

wherein at least one groove is formed at one or more ends of both ends of the first body, the second body and the middle body, respectively,

wherein the coupler includes at least three protrusions formed thereat which are inserted into the grooves formed on the ends of the first body, the second body and the middle body, respectively.

8. The lighting device of claim 7, wherein the light source unit further comprises a spring being disposed on the middle body and disposed between the first body and the second body, and providing an elastic force to the first body and the second body, wherein the elastic force widens a space between the first body and the second body.

9. The lighting device of claim 7, wherein when the first and the second bodies rotate in the direction of the middle body, so that the limit switch is pressed by the first and the second bodies, the limit switch is a mechanical switch that electrically isolates the second connection terminal from the plurality of the light emitting diodes by disconnecting the electrical connection between the middle body and the first body and the electrical connection between the middle body and the second body.

10. The lighting device of claim 4, wherein the reflector has a parabola-shaped surface.

11. The lighting device of claim 10, further comprising a power supply unit that is disposed in a space between the reflector and the housing, and supplies one or both of electric power and a driving signal to the light source unit when the light source unit is coupled to the coupling member.

12. The lighting device of claim 11, wherein the limit switch comprises a pressure sensor, and wherein if the intensity of pressure applied by the first body and the third body is greater than that of a predetermined pressure, when the light source unit is coupled to the coupling member, the pressure sensor outputs to the power supply unit a control signal for disconnecting the electric power supplied to the light source unit.

13. The lighting device of claim 11, further comprising a magnet disposed on one side of the first body, wherein the limit switch includes a magnetic sensor, wherein the magnetic sensor measures the intensity of the magnetic field generated by the magnet of the first body, and wherein if the measured intensity of the magnetic field is greater than that of a predetermined magnetic field, when the light source unit is coupled to the coupling member, the magnetic sensor outputs to the power supply unit a control signal for disconnecting the electric power supplied to the light source unit.

14. The lighting device of claim 4, wherein the first coupling unit includes a projection, wherein the inner wall surface of the insertion groove has a plurality of grooves, wherein the projection is inserted into at least one of the plurality of grooves so that the light source unit is coupled to the coupling member.