Source: https://patents.google.com/patent/US9429278B2/en
Timestamp: 2019-04-19 12:40:01
Document Index: 95878800

Matched Legal Cases: ['Application No. 10', 'art 316', 'art 316', 'art 316', 'art 316', 'art 316', 'art 316', 'art 330', 'art 330', 'art 330', 'art 330', 'art 330', 'art 330', 'art 330', 'Application No. 201010520982', 'Application No. 10173430', 'Application No. 2014', 'Application No. 2010', 'Application No. 2010', 'Application No. 10173422', 'Application No. 10173430']

US9429278B2 - Lighting device - Google Patents
US9429278B2
US9429278B2 US14/508,102 US201414508102A US9429278B2 US 9429278 B2 US9429278 B2 US 9429278B2 US 201414508102 A US201414508102 A US 201414508102A US 9429278 B2 US9429278 B2 US 9429278B2
US14/508,102
US20150077992A1 (en
2010-08-19 Priority to US12/805,796 priority patent/US8534865B2/en
2013-09-03 Priority to US14/016,680 priority patent/US8899781B2/en
2014-10-07 Priority to US14/508,102 priority patent/US9429278B2/en
2014-10-07 Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
2015-03-19 Publication of US20150077992A1 publication Critical patent/US20150077992A1/en
2016-08-30 Publication of US9429278B2 publication Critical patent/US9429278B2/en
A lighting device comprises a housing including an upper surface and an inner wall surface; a coupling member coupled to the upper surface of the housing; a reflector disposed between the coupling member and the inner wall surface of the housing; a light source unit coupled to the coupling member and having a light emitting groove in which a light emitting device is disposed, wherein the reflector is disposed over the light emitting groove, wherein the light source unit comprises a projection part disposed around the light emitting groove, and wherein the projection part is provided a prescribed distance from the upper surface, the prescribed distance being greater than or equal to a distance of an end of the housing from the upper surface.
This application is a Continuation application of U.S. application Ser. No. 14/016,680 filed Sep. 3, 2013, which is a Continuation application of U.S. application Ser. No. 12/805,796 filed Aug. 19, 2010, which claims priority from Korean Application No. 10-2009-0076953, filed Aug. 19, 2009, No. 10-2010-0030716, filed Apr. 5, 2010, No. 10-2010-0028854, filed Mar. 30, 2010, No. 10-2010-0028855, filed Mar. 30, 2010, No. 10-2010-0028856, filed Mar. 30, 2010, No. 10-2010-0028857, filed Mar. 30, 2010, No. 10-2010-0028858, filed Mar. 30, 2010, No. 10-2010-0028859, filed Mar. 30, 2010, the subject matters of which are incorporated herein by reference
One embodiment is a lighting device. The lighting device comprises a housing including an upper surface and an inner wall surface; a coupling member coupled to the upper surface of the housing; a reflector disposed between the coupling member and the inner wall surface of the housing; a light source unit coupled to the coupling member and having a light emitting groove in which a light emitting device is disposed, wherein the reflector is disposed over the light emitting groove, wherein the light source unit comprises a projection part disposed around the light emitting groove, and wherein the projection part is provided a prescribed distance from the upper surface, the prescribed distance being greater than or equal to a distance of an end of the housing from the upper surface.
Another embodiment is a lighting device. The lighting device comprises a housing; a coupling member disposed in the housing, having a recess, and comprising a first surface and a second surface which are disposed in the recess; and a light source unit comprising a first body and a second body, wherein each of the first surface and the second surface has a first recess and a second recess which is disposed under the first recess, wherein each of the first body and the second body comprises a coupling unit coupled to the coupling member, wherein the coupling unit comprises a projection being inserted into at least one of the first recess and the second recess.
Further another embodiment is a lighting device. The lighting device comprises a housing comprising an upper surface, a first side surface, a second side surface facing the first side surface, a third side surface and a fourth side surface facing the third side surface; a coupling member coupled to the upper surface, having a recess, and comprising a first end coupled to the first side surface and a second end coupled to the second side surface; a reflector comprising a first reflector could between the third side surface and the coupling member and a second reflector coupled between the fourth side surface and the coupling member; a light source unit coupled to the coupling member and comprising a first end coupled to the first side surface and a second end coupled to the second side surface, wherein the light source unit comprises a first lighting module emitted lights to the first reflector and a second lighting module emitted lights to the second reflector.
FIG. 1 is a perspective view of a light device in accordance with an embodiment 1 of the present invention.
FIG. 2 is an exploded perspective view of a light device in accordance with the embodiment 1 of the present invention.
FIG. 3 is a cross sectional view of a light device in accordance with the embodiment 1 of the present invention.
FIG. 4c is a view showing a light distribution angle of a light emitting diode mounted in the light emitting recess according to the embodiment 1 of the present invention.
FIGS. 5 and 6 are perspective views of a light source unit in accordance with the embodiment 1 of the present invention.
FIG. 7 is an exploded perspective view of a light source unit in accordance with the embodiment 1 of the present invention.
FIG. 8 is a perspective view of a coupling of a first connection terminal and a second connection terminal of a lighting device in accordance with the embodiment 1 of the present invention.
FIGS. 9a and 9b are plan views of a first connection terminal and a second connection terminal of a lighting device in accordance with the embodiment 1 of the present invention.
FIGS. 10a and 10b show a coupling and separation process of a light source unit and a coupling member in accordance with the embodiment 1 of the present invention.
FIGS. 11a and 11b show how a limit switch in accordance with the embodiment 1 is operated.
FIGS. 12 and 13 are cross sectional views showing a light source unit and a coupling member of a lighting device in accordance with a modified embodiment 1.
FIG. 14 is a perspective view of a light device in accordance with an embodiment 2 of the present invention.
FIG. 15 is an exploded perspective view of the light device in accordance with the embodiment 2 of the present invention.
FIG. 16 is a cross sectional view of the light device in accordance with the embodiment 2 of the present invention.
FIG. 17a is a cross sectional view of a coupling member shown in FIG. 16.
FIG. 17b is a view showing an enlarged part denoted by “A” of FIG. 16.
FIG. 17c is a view showing a light distribution angle of a light emitting diode mounted in the light emitting recess according to the embodiment 2 of the present invention.
FIG. 18 is a perspective view of a light source unit in accordance with the embodiment 2 of the present invention.
FIG. 19 is an exploded perspective view of the light source unit in accordance with the embodiment 2 of the present invention.
FIG. 20 is a perspective view of a coupling of a first connection terminal and a second connection terminal of the lighting device in accordance with the embodiment 2 of the present invention.
FIGS. 21a and 21b are plan views of the first connection terminal and the second connection terminal of the lighting device in accordance with the embodiment 2 of the present invention.
FIGS. 22 and 23 show a coupling and separation process of the light source unit and the coupling member in accordance with the embodiment 2 of the present invention.
FIGS. 24a and 24b show how a limit switch in accordance with the embodiment 2 is operated.
FIGS. 25 and 26 are cross sectional views showing the lighting device in accordance with a modified embodiment 2.
FIG. 1 is a perspective view of a light device 1 in accordance with an embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of a light device 1 in accordance with the embodiment 1 of the present invention. FIG. 3 is a cross sectional view of the light device in accordance with the embodiment 1 of the present invention. FIG. 4a is a cross sectional view of a coupling member shown in FIG. 3. FIG. 4b is a view showing an enlarged part denoted by “A” of FIG. 3. FIG. 4c is a view showing a light distribution angle θ of a light emitting diode 312 mounted in the light emitting recess (or groove) 316 according to the embodiment 1 of the present invention. In the present disclosure the terms recess and groove are used interchangeably.
In FIGS. 1 to 4 c, a lighting device 1 in accordance with an embodiment 1 of the present invention includes a housing 100, a coupling member 110, a reflector 200, a light source unit 300 and a power supply unit 400.
A connecting recess 107 for connecting electrically the power supply unit 400 to an external power supply is formed on a lateral surface and/or an upper surface of the housing 100.
A second recess 103 is formed on the inner wall surface of the housing 100. A first side 210 of the reflector 200 is inserted into the second recess 103. It is possible to form the one second recess 103 or a plurality of the second recesses 103.
A first recess 111 is formed on an outer wall surface of the coupling member 110. The first recess 111 is formed to be extended in the first direction. A second side 220 of the reflector 200 is inserted into the first recess 111.
The housing 100 and the coupling member 110 can fix and sustain the reflector 200 by inserting the first side 210 of the reflector 200 into the second recess 103 of the housing 100 and by inserting the second side 220 of the reflector 200 into the first recess 111 of the coupling member 110.
An insertion recess 112 is formed in the middle part of the coupling member 110. A part of the light source unit 300 is inserted into the insertion recess 112. The insertion recess 112 can be formed to be extended in the first direction.
A third recess 113 is formed on an inner wall surface of the insertion recess 112. A projection 313 of the light source unit 300 is inserted into the third recess 113. As a result, the light source unit 300 is securely coupled to the coupling member 110 by means of the third recess 113. The coupling of the light source unit 300 and the coupling member 110 will be described later in more detail.
A first connection terminal 120 is formed in the middle part within the insertion recess 112. When the light source unit 300 is inserted into the insertion recess 112, the first connection terminal is coupled to and electrically connected to a second connection terminal 330 of the light source unit 300. When the first connection terminal 120 is connected to the second connection terminal 330, electric power and/or a driving signal can be transferred to the light source unit 300 through the first connection terminal 120 and the second connection terminal 330.
It is desirable to form the coupling member 110 by using a material capable of efficiently releasing and/or transferring the heat. For example, the coupling member 110 is made of a metallic material such as Al, Sn, Ni, Ag, Cu, Ti, Mo, W, Au and Pt and so on.
For example, as shown in FIG. 2, the second reflector 200 b is coupled to the housing 100 and the coupling member 110 by inserting the second side 220 of the second reflector 200 b into the first recess 111 of the coupling member 110 and by inserting the first side 210 of the second reflector 200 b into the second recess 103 of the housing 100. The second side 220 of the reflector 200 can have a level difference. The first side 210 of the reflector 200 can also have a level difference. At least one insertion end 211 which is inserted into the second recess 103 is formed at the first side 210 of the reflector 200. A shape of the second recess 103 is formed to correspond to the selection end 211.
The power supply unit 400 is electrically connected to the light source unit 300 through a wire or a flexible printed circuit board (FPCB). For example, a wire or a FPCB is extended from the power supply unit 400 and is electrically connected to the first connection terminal 120 through the connecting recess 107 formed in the coupling member 110. The first connection terminal 120 is electrically connected to the second connection terminal 330. As a result, the power supply unit 400 is electrically connected to the light source unit 300.
FIG. 4b is a view showing an enlarged part denoted by “A” of FIG. 3. FIGS. 5 and 6 are perspective views of a light source unit 300 in accordance with an embodiment 1 of the present invention. FIG. 7 is an exploded perspective view of a light source unit 300 in accordance with an embodiment 1 of the present invention.
In FIGS. 4 to 7, the light source unit 300 in accordance with an embodiment 1 of the present invention includes a first body 310 a, a second body 310 b, a middle body 320, a plurality of light emitting diodes (LED) 312 and a coupling cap 350. The first body, the second body 310 b and the middle body 320 form a body of the light source unit 300. The light source unit 300 may be formed to be extended in the first direction, that is, in the direction of length of the reflector 200.
A light emitting recess 316 is formed on the first and the second sloping surfaces respectively.
A substrate 311 is provided on the basal surface of the light emitting recess 316. A plurality of the light emitting diodes 312 may be provided on the substrate 311. Otherwise, a plurality of electrodes (not shown) are disposed in the light emitting recesses 316 so that a plurality of the electrodes (not shown) is electrically connected to a plurality of the light emitting diodes 312. An optical structure 318 is formed on a plurality of the light emitting diodes 312. The optical structure 318 will be described later.
The depth and width of the light emitting recess 316 can be variously adjusted according to the light distribution of a plurality of the light emitting diodes 312 disposed inside the light emitting recess 316. In other words, the lighting device 1 is able to cause the reflector 200 to provide users with light radiated from the light source unit 300 by adjusting the depth and width of the light emitting recess 316 instead of directly providing users with light radiated from the light source unit 300. As a result, it is possible to provide users with subdued light by reducing glare.
A light distribution angle of light emitted from the light emitting recess 316 is from 90° to 110°. The depth and width of the light emitting recess 316 is formed to cause light emitted from the light emitting recess 316 to be incident evenly on the entire area of the reflector 200.
Additionally, the depth and width of the light emitting recess 316 is adjusted such that a part of light radiated from a plurality of the light emitting diodes 312 is radiated to the outside through the opening 101 and the rest of the light is reflected by the reflector 200 and is radiated to the outside through the opening 101.
A plurality of the light emitting diodes 312 are determined, for example, through various combinations of red, green, blue and white light emitting diode which radiate red, green, blue and white light respectively. A plurality of the light emitting diodes 312 can be disposed in the light emitting recess 316 in the form of an array.
The optical structure 318 is coupled to the light source unit 300 by inserting in a sliding way both ends of the optical structure 318 into a fourth recess formed on an inner surface of the light emitting recess 316. For example, the fourth recess is extended in the first direction and the optical structure 318 is coupled to the light source unit 300 by being inserted into the fourth recess in the first direction.
The optical structure 318 is easily coupled to the fourth recess. Accordingly, a lens, a diffusion sheet and a phosphor luminescent film (PLF) can be alternately used as the optical structure 318.
To overcome such a problem, the light emitting recess 316 may be formed to block the light emitted directly from the light emitting diode 312 to the outside of the housing 100. That is, the light emitting recess 316 includes a projection part 316 b formed on the basal surface thereof, thereby blocking the light emitted directly from the light emitting diode 312 to the outside of the housing 100.
As a result, due to the projection part 316 b of the light emitting recess 316, the light emitted from a plurality of the light emitting diodes 312 is not directly provided to a user and is uniformly incident on the whole area of the reflector 200. Accordingly, it is possible to provide users with subdued light by reducing glare.
Furthermore, it is possible to block the direct light emitted from the light emitting diode 312 to the outside of the housing 100 by adjusting the depth and width of the light emitting recess 316, the height of the projection part 316 b, the sloping angle of the basal surface 316 a, the height of the housing 100 or the width of the reflector 200 and the like.
The first body 310 a is formed to have a first coupling unit 315 a. The first coupling unit 315 a is an upper part of the first body 310 a and is inserted into the insertion recess 112 of the coupling member 110.
The second body 310 b is formed to have a second coupling unit 315 b. The second coupling unit 315 b is an upper part of the second body 310 b and is inserted into the insertion recess 112 of the coupling member 110.
A projection 313 is formed in the upper ends of the first coupling unit 315 a and the second coupling unit 315 b respectively. The projection 313 has a shape in which a part of the upper end of each of the first coupling unit 315 a and the second coupling unit 315 b is projected outward. When the first coupling unit 315 a and the second coupling unit 315 b of the first body 310 a and the second body 310 b are inserted into the insertion recess 112 of the coupling member 110, the projection 313 is inserted into the third recess 113 formed in the insertion recess 112. As a result, the light source unit 300 is strongly coupled to the coupling member 110.
The second connection terminal 330 is formed in the middle body 320. When the light source unit 300 is inserted into and coupled to the coupling member 110, the second connection terminal 330 is electrically connected to the first connection terminal 120 by being coupled to the first connection terminal 120 formed in the insertion recess 112 of the coupling member 110. The power supply unit 400 provides electric power and/or a driving signal to the light source unit 300 through the first connection terminal 120 and the second connection terminal 330.
On the middle body 320, a spring 340 is disposed between the first body 310 a and the second body 310 b. For example, as shown in FIG. 4b , the spring 340 can have a ‘
’-shape and can be disposed contacting with the upper surface and the lateral surfaces of the first body 310 a and the second body 310 b. In more detail, the spring 340 is disposed contacting with the inner surfaces of the first coupling unit 315 a and the second coupling unit 315 b.
The spring 340 provides an elastic force to the first body 310 a and the second body 310 b, coupling securely the light source unit 300 to the insertion recess 112 of the coupling member 110. The spring 340 provides the first body 310 a and the second body 310 b with an elastic force widening a space between the first body 310 a and the second body 310 b. That is, the spring 340 is disposed between the first body 310 a and the second body 310 b and performs a function of pushing outward the first body 310 a and the second body 310 b. Accordingly, when the light source unit 300 is inserted into the coupling member 110, the projections 313 formed in the upper ends of the first body 310 a and the second body 310 b are strongly coupled to the insertion recess 112 of the coupling member 110 by the force from the spring 340.
When the light source unit 300 is inserted into the insertion recess 112 of the coupling member 110, there is an empty space between the light source unit 300 and the insertion recess 112. Therefore, heat generated from the light source unit 300 can be effectively released through the empty space. Additionally, a part of the light source unit 300 has an uneven structure capable of efficiently radiating heat.
When the light source unit 300 is inserted into the insertion recess 112 of the coupling member 110, there is a contact area between the inner surface of the insertion recess 112 and both the first coupling unit 315 a and the second coupling unit 315 a. As such, one surfaces of the first coupling unit 315 a and the second coupling unit 315 b contact with the inner surface of the insertion recess 112, thereby forming a thermal conductivity route from the light source unit 300 to the coupling member 110. In this case, the wider the contact surface is, the more increased a radiant heat effect is. But, the heights of the first body 310 a and the second body 310 b are increased. Consequently, the height of the housing 100 should be increased. Therefore, it is necessary to consider a relation between the contact area and the height of the housing 100 in order that the lighting device 1 obtains an optimized radiant heat effect.
As shown in FIG. 7, a first recess 361 a is formed on one side in the middle of the first body 310 a. A second recess 361 b is formed on one side in the middle of the second body 310 b. A third recess 361 c is formed in the middle of the middle body 320. One side of each of the first recess 361 a and the second recess 361 b is opened to the outside of the light source unit 300.
A fourth recess 361 d is formed on the other side of the lower part the first body 310 a. A fifth recess 361 e is formed on the other side of the lower part of the first body 310 b. The sixth recess 361 f is formed in the lower part of the middle body 320.
The first body 310 a, the second body 310 b and the middle body 320 are coupled to each other by inserting the first deterrent protrusion 351 a into the first recess 361 a, inserting the second deterrent protrusion 351 b into the second recess 361 b, inserting the upper part fixing protrusion 351 c into the third recess 361 c, inserting the first axis protrusion 351 d into the fourth recess 361 d, inserting the second axis protrusion 351 e into the fifth recess 361 e, and inserting the lower part fixing protrusion 351 f into the third recess 361 f.
The coupling cap 350 is fixed to the middle body 320 by inserting the upper part fixing protrusion 351 c and the lower part fixing protrusion 351 f into the third recess 361 c and the sixth recess 361 f respectively.
The spring 340 retains a force pushing outward the first body 310 a and the second body 310 b. When the force causes a space between the first body 310 a and the second body 310 b to be widened to a certain extent, the space between the first body 310 a and the second body 310 b is not widened anymore because the first body 310 a and the second body 310 b are fixed by the first deterrent protrusion 351 a and the second deterrent protrusion 351 b respectively. In this case, a maximum angle between the first body 310 a and the second body 310 b is formed by the first deterrent protrusion 351 a and the second deterrent protrusion 351 b.
The first axis protrusion 351 d is inserted into the fourth recess 361 d and functions as an axis of rotation of the first body 310 a. The second axis protrusion 351 e is inserted into the fifth recess 361 e and functions as an axis of rotation of the second body 310 b. As a result, the first body 310 a and the second body 310 b can rotate about the first axis protrusion 351 d and the second axis protrusion 351 e respectively. Since one side of each of the first recess 361 a and the second recess 361 b is opened to the outside, the first recess 361 a and the second recess 361 b are separated from the first deterrent protrusion 351 a and the second deterrent protrusion 351 b respectively, during the rotations of the first body 310 a and the second body 310 b. The first axis protrusion 351 d and the second axis protrusion 351 e formed in the lower part of the coupling cap 350 are closely adjacent in order to function as axes of rotation.
The first and the second connection terminals 120 and 330 may be electrically connected to each other by inserting the light source unit 300 into the insertion recess 112.
FIG. 8 is a perspective view of a coupling of a first connection terminal 120 and a second connection terminal 330 of a lighting device 1 in accordance with an embodiment 1 of the present invention. FIGS. 9a and 9b are plan views of a first connection terminal 120 and a second connection terminal 330 of a lighting device 1 in accordance with an embodiment 1 of the present invention.
As such, since the structures and polarities of the first connection terminal 120 and the second connection terminal 330 are symmetrical to each other, it is possible to connect the light source unit 300 to the coupling member 110 irrespective of the coupling direction. Accordingly, the lighting device 1 according to the embodiment 1 makes it easier to couple the light source unit 300 to the coupling member 110, enhancing a convenience for use thereof.
FIGS. 10a and 10b show a coupling and separation process of a light source unit 300 and a coupling member 110 in accordance with an embodiment 1 of the present invention.
First, as shown in FIG. 10a , in the light source unit 300, an angle between the first body 310 a and the second body 310 b is reduced by applying a first force F to the first body 310 a and the second body 310 b which are coupled such that they can rotate about the lower part of the light source unit 300. Here, the direction of the first force F is reverse to the direction of the elastic force applied by the spring 340. When the lower parts of the first and the second coupling units 315 a and 315 b are pressed by applying the first force F, a space between the first and the second coupling units 315 a and 315 b is reduced, so that an angle between the first body 310 a and the second body 310 b is reduced.
If the first force F is not applied, a space between the first body 310 a and the second body 310 b is widened by the elastic force applied by the spring 340, so that it is difficult to insert the light source unit 300 into the insertion recess 112 of the coupling member 110.
In general, a lighting device such as a fluorescent lamp can be replaced while the lighting device is connected to a power supply. However, when a lighting device using the light emitting diode 312 is connected to a power supply and is replaced, the light emitting diode 312 may be damaged. To overcome such a problem, through the use of the limit switch 323, the lighting device according to the embodiment 1 recognizes an operation in which the first and the second bodies 310 a and 310 b move toward the middle body 320 as an operation of replacing the light source. As a result, during the operation of replacing the light source, it is possible to disconnect the electric power supplied to the light emitting diode 312.
As shown in FIG. 10b , as the first force F is applied to the first and the second bodies 310 a and 310 b, the light source unit 300 is inserted into the insertion recess 112 of the coupling member 110. Here, if the first force F is not applied, a space between the first and the second bodies 310 a and 310 b is widened again, so that the projection 313 is inserted into the third recess 113 formed on the inner surface of the insertion recess 112. As a result, the light source unit 300 can be coupled to the coupling member 110.
When the light source unit 300 is inserted into the coupling member 110, the spring 340 disposed between the first body 310 a and the second body 310 b pushes the first body 310 a and the second body 310 b, causing the projections 313 to be more securely coupled to the third recess 113.
The spring 340 gives continuously a uniform pressure to a contact surface formed by causing the first coupling unit 315 a and the second coupling unit 315 b to be contact with the insertion recess 112. Therefore, heat generated from the light source unit 300 can be more efficiently transferred through the contact surface mentioned above.
FIG. 11a shows how a mechanical limit switch according to an embodiment 1 is operated. FIG. 11b shows how a sensor type limit switch according to an embodiment 1 is operated.
The limit switch according to the embodiment 1 is able to employ a mechanical limit switch or a sensor type limit switch.
Subsequently, when the first connection terminal 120 is connected to the second connection terminal 330, the control signal generated by the limit switch 323, as shown in FIG. 11b , may be output to the power supply unit 400 through the first connection terminal 120 and the second connection terminal 330. As a result, the power supply unit 400 is hereby able to disconnect the electric power output based on the control signal.
According to the embodiment 1, when the light source unit 300 is required to be disposed or replaced for maintenance, it is possible to safely attach or remove the light source unit 300 by using the limit switch 323 even though the lighting device is in a live status.
Referring to FIGS. 12 and 13, a plurality of the third recesses 113 a, 113 b and 113 c are formed on the inner surface of the insertion recess 112 of the coupling member 110 of the lighting device 1. While the three third recesses 113 a, 113 b and 113 c are shown, there is no limit to the number of the third recesses.
The light source unit 300 is inserted into and coupled to the insertion recess 112. Here, the projection 313 of the upper part of the light source unit 300 is inserted into one of a plurality of the third recesses 113 a, 113 b and 113 c, so that the light source unit 300 is strongly coupled to the coupling member 110.
As shown in FIG. 12, depths of a plurality of the third recesses 113 a, 113 b and 113 c are different from each other, it is possible to diversely adjust the light distribution of the lighting device 1 in accordance with one of a plurality of the third recesses 113 a, 113 b and 113 c into which the projection 313 of the light source unit 300 is inserted.
As shown in FIG. 13, the insertion recess 112 has a sloping inner surface. When a plurality of the third recesses 113 a, 113 b and 113 c are formed on the sloping inner surface of the insertion recess 112, an angle between the first body 310 a and the second body 310 b of the light source unit 300 varies in accordance with one of a plurality of the third recesses 113 a, 113 b and 113 c into which the projection 313 of the light source unit 300 is inserted. Therefore, it is possible to diversely adjust the light distribution of the lighting device 1.
As described above, it is possible to diversely adjust the light distribution of the lighting device 1 by forming a plurality of the third recesses 113 a, 113 b and 113 c on the inner surface of the insertion recess 112. As a result, even though a width or curvature of the reflector 200 changes, it is possible to provide an efficient lighting without changing the light source unit 300.
FIG. 14 is a perspective view of a light device in accordance with an embodiment 2 of the present invention. FIG. 15 is an exploded perspective view of the light device in accordance with the embodiment 2 of the present invention. FIG. 16 is a cross sectional view of the light device in accordance with the embodiment 2 of the present invention. FIG. 17a is a cross sectional view of a coupling member shown in FIG. 16. FIG. 17b is a view showing an enlarged part denoted by “A” of FIG. 16. FIG. 17c is a view showing a light distribution angle of a light emitting diode mounted in the light emitting recess according to the embodiment 2 of the present invention.
In FIGS. 14 to 17 c, a lighting device in accordance with an embodiment 2 of the present invention includes a housing 100, a coupling member 110, a reflector 200, a light source unit 300 and a power supply unit 400.
The housing 100 is made of a material capable of efficiently releasing heat. For example, the housing 100 is made of a metallic material such as Al, Sn, Ni, Ag, Cu, Ti, Mo, W, Au and Pt and so on.
Meanwhile, in order to dispose the lighting device on an external support member such as a ceiling or a wall surface, an insertion unit corresponding to a shape of the lighting device is formed in the external support member, and then the lighting device is inserted into and fixed to the insertion unit. Here, a coupling frame 500 is coupled to the lower part of the lateral surface of the housing 100, so that the lighting device can be securely coupled to the external support member.
A first insertion recess 112 is formed in the middle part of the coupling member 110. A part of the light source unit 300 is inserted into the first insertion recess 112. The first insertion recess 112 can be formed to be extended in the first direction.
A plurality of third recesses 113 are formed on an inner wall surface of the first insertion recess 112. A projection 313 of the light source unit 300 is inserted into the third recess 113. As a result, the light source unit 300 is securely coupled to the coupling member 110 by means of the third recess 113. The coupling of the light source unit 300 and the coupling member 110 will be described later in more detail.
A first connection terminal 120 is formed in the middle part within the first insertion recess 112. When the light source unit 300 is inserted into the first insertion recess 112, the first connection terminal 120 is coupled to and electrically connected to a second connection terminal 336 of the light source unit 300. When the first connection terminal 120 is connected to the second connection terminal 336, electric power and/or a driving signal can be transferred to the light source unit 300 through the first connection terminal 120 and the second connection terminal 336.
Based on a design of the light source device, it is possible to form the one first connection terminal 120 or a plurality of the first connection terminals 120. More detailed descriptions of the first connection terminal 120 and the second connection terminal 336 will be provided later.
For example, as shown in FIG. 15, the second reflector 200 b is coupled to the housing 100 and the coupling member 110 by inserting the second side 220 of the second reflector 200 b into the first recess 111 of the coupling member 110 and by inserting the first side 210 of the second reflector 200 b into the second recess 103 of the housing 100. The second side 220 of the reflector 200 can have a level difference. The first side 210 of the reflector 200 can also have a level difference. At least one insertion end 211 which is inserted into the second recess 103 is formed at the first side 210 of the reflector 200. A shape of the second recess 103 is formed to correspond to the selection end 211.
Here, the material and color of the reflector 200 are not limited and are variously selected depending on a lighting generated by the lighting device.
As shown in FIGS. 15 and 16, the power supply unit 400 is disposed in a space between the parabola-shaped reflector 200 and the inner surface of the housing 100. That is, due to the parabola shape of the reflector 200, an empty space is formed between the reflector 200 and a corner inside the housing 100. As a result, the power supply unit 400 is disposed in the empty space.
The power supply unit 400 is electrically connected to the light source unit 300 through a wire or a flexible printed circuit board (FPCB). For example, a wire or a FPCB is extended from the power supply unit 400 and is electrically connected to the first connection terminal 120 through the connecting recess 107 formed in the coupling member 110. The first connection terminal 120 is electrically connected to the second connection terminal 336. As a result, the power supply unit 400 is electrically connected to the light source unit 300.
FIG. 17a is a cross sectional view of a coupling member shown in FIG. 16. FIG. 17b is a view showing an enlarged part denoted by “A” of FIG. 16. FIG. 17c is a view showing a light distribution angle of a light emitting diode mounted in the light emitting recess according to the embodiment 2 of the present invention. FIG. 18 is a perspective view of the light source unit 300 in accordance with the embodiment 2 of the present invention. FIG. 19 is an exploded perspective view of the light source unit 300 in accordance with the embodiment 2 of the present invention.
Referring to FIGS. 17a to 19, the light source unit 300 according to the embodiment 2 of the present invention includes a first body 310, a second body 320, a middle body 330, a first main light emitting diode module 304, a second main light emitting diode module 306, an auxiliary light emitting diode module 308 and a spring 340. The body of the light source unit 300 includes the first body 310, the second body 320 and the middle body 330. The light source unit 300 may be extended in the first direction, that is, in the direction of length of the reflector 200.
Hereinafter, the structure of the light source unit 300 will be described in more detailed.
1) First Body 310
A first coupling unit 310 a is formed in the upper part of the first body 310. The first coupling unit 310 a constitutes the upper part of the first body 310 and is inserted into the first insertion recess 112 of the coupling member 110.
A first projection 310 c is formed in the upper end of the first coupling unit 310 a. The first projection 310 c has a shape in which a part of the upper end of the first coupling unit 310 a is projected outward.
A first light emitting recess 312 is formed on one side of the lower part of the first body 310. The basal surface of the first light emitting recess 312 is formed to have a first sloping surface 310 b. The first sloping surface 310 b is formed to face the parabolic surface of the first reflector 200 a. Here, a plurality of the sloping surfaces as well as the first sloping surface 310 b may be formed in the first body 310.
The first main light emitting diode module 304 is disposed in the first light emitting recess 312. The first main light emitting diode module 304 includes a first substrate 313, a plurality of main light emitting diodes 314 and a first optical structure 315.
The first substrate 313 is disposed on the basal surface of the first light emitting recess 312 along the first sloping surface 310 b.
The plurality of the main light emitting diodes 314 are disposed on the first substrate 313 along the first sloping surface 310 b and are electrically connected to the first substrate 313. Otherwise, a plurality of electrodes (not shown) are disposed on the first sloping surface 310 b, and then the plurality of the main light emitting diodes 314 are electrically connected to the plurality of electrodes (not shown) respectively. Such a plurality of the main light emitting diodes 314 may be arranged within the first light emitting recess 312 in the form of an array.
The plurality of the main light emitting diodes 314 are determined, for example, through various combinations of red, green, blue and white light emitting diode which radiate red, green, blue and white light respectively.
The plurality of the main light emitting diodes 314 are controlled by electric power and/or a driving signal which are provided by the power supply unit 400, causing the plurality of the main light emitting diodes 314 to selectively emit light or to adjust the luminance of light.
The first optical structure 315 is disposed on the plurality of the main light emitting diodes 314. The first optical structure 315 functions to adjust the light distribution and the color sense of light radiated from the plurality of the main light emitting diodes 314, and creates emotional lighting having various luminance and color senses if necessary.
The first optical structure 315 is coupled to the inside of the first light emitting recess 312 by inserting in a sliding way both ends of the first optical structure 315 into a fourth recess 312 a formed on an inner surface of the first light emitting recess 312. More specifically, the fourth recess 312 a is extended in the first direction and the first optical structure 315 is coupled to the inside of the first light emitting recess 312 by being inserted into the fourth recess 312 a in the first direction.
The first optical structure 315 includes at least one of a lens, a diffusion sheet and a phosphor luminescent film (PLF).
The lens includes various lenses such as a concave lens, a convex lens and a condensing lens and so on according to a design of the lighting device.
The diffusion sheet diffuses evenly light radiated from the plurality of the main light emitting diodes 314.
The phosphor luminescent film (PLF) includes fluorescent substance. Since the fluorescent substance included in the phosphor luminescent film (PLF) is excited by light radiated from the plurality of the main light emitting diodes 314, the lighting device can produce emotional lighting having various color senses by mixing a first light radiated from the plurality of the main light emitting diodes 314 and a second light excited by the fluorescent substance. For example, when the plurality of the main light emitting diodes 314 radiate blue light and the phosphor luminescent film (PLF) includes a yellow fluorescent substance excited by blue light, the lighting device radiates white light by mixing the blue light and yellow light.
The first optical structure 315 is easily coupled to the first light emitting recess 312 through the fourth recess 312 a. Accordingly, a lens, a diffusion sheet and a phosphor luminescent film (PLF) can be alternately used as the first optical structure 315.
The depth and width of the first light emitting recess 312 can be variously adjusted according to the light distribution of the plurality of the main light emitting diodes 314 disposed within the first light emitting recess 312. In other words, the lighting device is able to cause the reflector 200 to provide users with light radiated from the light source unit 300 by adjusting the depth and width of the first light emitting recess 312 instead of directly providing users with light radiated from the light source unit 300. As a result, it is possible to provide users with subdued light by reducing glare.
A light distribution angle of light emitted from the first light emitting recess 312 is from 90° to 110°. The depth and width of the first light emitting recess 312 is formed to cause light emitted from the first light emitting recess 312 to be incident evenly on the entire area of the reflector 200.
Additionally, the depth and width of the first light emitting recess 312 is adjusted such that a part of light radiated from the plurality of the main light emitting diodes 314 is radiated to the outside through the opening 101 and the rest of the light is reflected by the reflector 200 and is radiated to the outside through the opening 101.
A first hinge 311 may be formed on the other side of the lower part of the first body 310. The first hinge 311 has a shape protruding outward. Also, the first hinge 311 may be extended in the first direction.
2) Second Body 320
A second coupling unit 320 a is formed in the upper part of the second body 320. The second coupling unit 320 a constitutes the upper part of the second body 320 and is inserted into the first insertion recess 112 of the coupling member 110.
A second projection 320 c is formed in the upper end of the second coupling unit 320 a. The second projection 320 c has a shape in which a part of the upper end of the second coupling unit 320 a is projected outward.
A second light emitting recess 322 is formed on one side of the lower part of the second body 320. The basal surface of the second light emitting recess 322 is formed to have a second sloping surface 320 b. The second sloping surface 320 b is formed to face the parabolic surface of the second reflector 200 b. Here, a plurality of the sloping surfaces as well as the second sloping surface 320 b may be formed in the second body 320.
The second main light emitting diode module 306 is disposed in the second light emitting recess 322. The second main light emitting diode module 304 includes a first substrate 323, a plurality of main light emitting diodes 324 and a first optical structure 325.
The first substrate 323 is disposed on the basal surface of the second light emitting recess 322 along the second sloping surface 320 b.
The plurality of the main light emitting diodes 324 are disposed on the first substrate 323 along the second sloping surface 320 b and are electrically connected to the first substrate 323. Otherwise, a plurality of electrodes (not shown) are disposed on the second sloping surface 320 b, and then the plurality of the main light emitting diodes 324 are electrically connected to the plurality of electrodes (not shown) respectively. Such a plurality of the main light emitting diodes 324 may be arranged within the second light emitting recess 322 in the form of an array.
The plurality of the main light emitting diodes 324 are determined, for example, through various combinations of red, green, blue and white light emitting diode which radiate red, green, blue and white light respectively.
The plurality of the main light emitting diodes 324 are controlled by electric power and/or a driving signal which are provided by the power supply unit 400, causing the plurality of the main light emitting diodes 324 to selectively emit light or to adjust the luminance of light.
The first optical structure 325 is disposed on the plurality of the main light emitting diodes 324. The first optical structure 325 functions to adjust the light distribution and the color sense of light radiated from the plurality of the main light emitting diodes 324, and creates emotional lighting having various luminance and color senses if necessary.
The first optical structure 325 is coupled to the inside of the second light emitting recess 322 by inserting in a sliding way both ends of the first optical structure 325 into a fourth recess 322 a formed on an inner surface of the second light emitting recess 322. More specifically, the fourth recess 322 a is extended in the first direction and the first optical structure 325 is coupled to the inside of the second light emitting recess 322 by being inserted into the fourth recess 322 a in the first direction.
The first optical structure 325 includes at least one of a lens, a diffusion sheet and a phosphor luminescent film (PLF).
The diffusion sheet diffuses evenly light radiated from the plurality of the main light emitting diodes 324.
The phosphor luminescent film (PLF) includes fluorescent substance. Since the fluorescent substance included in the phosphor luminescent film (PLF) is excited by light radiated from the plurality of the main light emitting diodes 324, the lighting device can produce emotional lighting having various color senses by mixing a first light radiated from the plurality of the main light emitting diodes 324 and a second light excited by the fluorescent substance. For example, when the plurality of the main light emitting diodes 324 radiate blue light and the phosphor luminescent film (PLF) includes a yellow fluorescent substance excited by blue light, the lighting device radiates white light by mixing the blue light and yellow light.
The first optical structure 325 is easily coupled to the second light emitting recess 322 through the fourth recess 322 a. Accordingly, a lens, a diffusion sheet and a phosphor luminescent film (PLF) can be alternately used as the first optical structure 325.
The depth and width of the second light emitting recess 322 can be variously adjusted according to the light distribution of the plurality of the main light emitting diodes 324 disposed within the second light emitting recess 322. In other words, the lighting device is able to cause the reflector 200 to provide users with light radiated from the light source unit 300 by adjusting the depth and width of the second light emitting recess 322 instead of directly providing users with light radiated from the light source unit 300. As a result, it is possible to provide users with subdued light by reducing glare.
A light distribution angle of light emitted from the second light emitting recess 322 is from 90° to 110°. The depth and width of the second light emitting recess 322 is formed to cause light emitted from the second light emitting recess 322 to be incident evenly on the entire area of the reflector 200.
Additionally, the depth and width of the second light emitting recess 322 is adjusted such that a part of light radiated from the plurality of the main light emitting diodes 324 is radiated to the outside through the opening 101 and the rest of the light is reflected by the reflector 200 and is radiated to the outside through the opening 101.
A second hinge 321 may be formed on the other side of the lower part of the second body 320. The second hinge 321 has a shape protruding outward. Also, the second hinge 321 may be extended in the first direction.
As described above, the first body 310 and the second body 320 have the same structure and configuration.
Also, the first body 310 and the second body 320 may be manufactured in such a manner as to have a constant cross section in the first direction by means of an extrusion molding method.
Also, the first body 310 and the second body 320 may be formed of metallic material such as Al, Sn, Ni, Ag, Cu, Ti, Mo, W, Au and Pt and the like so as to release heat generated from the plurality of the main light emitting diodes 314 and 324.
To overcome such a problem, the first and the second light emitting recesses 312 and 322 may be formed to block the light emitted directly from the light emitting diodes 314 and 324 to the outside of the housing 100. That is, the first and the second light emitting recesses 312 and 322 includes a projection part 316 b formed on the basal surface thereof, thereby blocking the light emitted directly from the light emitting diodes 314 and 324 to the outside of the housing 100.
As a result, due to the projection part 316 b of the light emitting recess 316, the light emitted from a plurality of the light emitting diodes 314 and 324 is not directly provided to a user and is uniformly incident on the whole area of the reflector 200. Accordingly, it is possible to provide users with subdued light by reducing glare.
Furthermore, it is possible to block the direct light emitted from the light emitting diodes 314 and 324 to the outside of the housing 100 by adjusting the depth and width of the first and the second light emitting recesses 312 and 322, the height of the projection part 316 b, the sloping angle of the basal surface 316 a, the height of the housing 100 or the width of the reflector 200 and the like.
The sloping plane toward the reflector 200 is formed in the first body 310 and the second body 320. Therefore, regarding a cross section of the light source unit 300 formed by coupling the first body 310, the second body 320 and the middle body 330, the width of the lower part of the light source unit 300 is greater that of the upper part of the light source unit 300. For example, the cross section of the light source unit 300 can have various shapes such as a fan shape or a polygon shape and the like.
3) Middle Body 330
A second insertion recess 331 is formed on both sides of the lower part 330 a of the middle body 330. The second insertion recess 331 is extended in the first direction. Here, the first hinge 311 of the first body 310 and the second hinge 321 of the second body 320 are inserted into the second insertion recess 331. For example, the first hinge 311 and the second hinge 321 may be inserted into the second insertion recess 331 respectively in a sliding way. The first body 310 and the second body 320 are hereby coupled to both sides of the middle body 330 in an attachable and removable manner. Also, the first body 310 and the second body 320 may be coupled to rotate about the first hinge 311 and the second hinge 321 respectively.
An auxiliary light emitting diode module 308 is disposed on the basal surface of the lower part 330 a of the middle body 330. More specifically, a third light emitting recess 332 is formed on the basal surface of the lower part of the middle body 330, and the auxiliary light emitting diode module 308 is disposed within the third light emitting recess 332. The auxiliary light emitting diode module 308 includes a second substrate 333, a plurality of auxiliary light emitting diodes 334 and a second optical structure 335.
The second substrate 333 is disposed on the inner upper surface of the third light emitting recess 332.
The plurality of the auxiliary light emitting diodes 334 are disposed on the second substrate 333 and are electrically connected to the second substrate 333. Otherwise, a plurality of electrodes (not shown) are disposed on the inner upper surface of the third light emitting recess 332, and then the plurality of the auxiliary light emitting diodes 334 are electrically connected to the plurality of electrodes (not shown) respectively.
The second optical structure 335 is coupled to the inside of the third light emitting recess 332 by inserting in a sliding way both ends of the third optical structure 335 into a fifth recess 332 a formed on the inner surface of the third light emitting recess 332. More specifically, the fifth recess 332 a is extended in the first direction and the second optical structure 335 is coupled to the inside of the third light emitting recess 332 by being inserted into the fifth recess 332 a in the first direction.
The plurality of the auxiliary light emitting diodes 334 are controlled by electric power and/or a driving signal which are provided by the power supply unit 400, causing the plurality of the auxiliary light emitting diodes 334 to selectively emit light or to adjust the luminance of light. For example, the auxiliary light emitting diode 334 is used in producing more illuminations, a subdued lighting condition and a display apparatus and the like.
The second optical structure 335 is disposed on the plurality of the auxiliary light emitting diodes 334. The second optical structure 335 functions to adjust the light distribution and the color sense of light radiated from the plurality of the auxiliary light emitting diodes 334, and creates emotional lighting having various luminance and color senses if necessary.
The second optical structure 335 includes at least one of a lens, a diffusion sheet and a phosphor luminescent film (PLF).
The second optical structure 335 is easily coupled to the third light emitting recess 332 through the fifth recess 332 a. Accordingly, a lens, a diffusion sheet and a phosphor luminescent film (PLF) can be alternately used as the first optical structure 315.
The middle body 330 according to the embodiment 2 may be manufactured in such a manner as to have a constant cross section in the first direction and to have a symmetrical structure by means of an extrusion molding method.
As described above, when the first body 310, the second body 320 and the middle body 330 are coupled to each other, the outer surfaces of the first hinge 311 and the second hinge 321 are in contact with the inner surface of the second insertion recess 331, so that a heat release path can be created between the first body 310, the second body 320 and the middle body 330.
Therefore, in order to improve the heat radiating effect, the lower part 330 a of the middle body 330 is made of a metallic material having high thermal conductivity, for example, Al, Sn, Ni, Ag, Cu, Ti, Mo, W, Au and Pt and the like. Since electrical components are mounted in the upper part 330 b of the middle body 330, it is to be desired that heat is not transferred to the upper part 330 b of the middle body 330. Therefore, the upper part of the middle body 330 is made of a material having low thermal conductivity, for example, plastic material and the like such that it is possible to prevent the heat generated by the first body 310, the second body 320 and the lower part of the middle body 330 from being transferred.
Further, the heat generated from the main light emitting diodes 314 and 324 and the auxiliary light emitting diode 334 is released by the body of the light source unit 300 or is transferred to the coupling member 110, and then is released. That is, when the light source unit 300 is inserted into the first insertion recess 112 of the coupling member 110, the first coupling unit 310 a and the second coupling unit 320 a have a contact area with the first insertion recess 112. As such, one sides of the first coupling unit 310 a and the second coupling unit 320 a contact with the inner surface of the first insertion recess 112, a thermal conductivity route from the light source unit 300 to the coupling member 110 can be formed. Here, the larger the contact area is, the higher the heat radiating effect is. However, the heights of the first body 310 and the second body 320 are increased, so that the height of the housing 100 is required to be increased. Accordingly, in order for the lighting device to have optimal heat radiating effect, it is necessary to consider the relationship between the contact area and the height of the housing 100. A part of the body of the light source unit 300 has an uneven structure, thereby effectively releasing the heat.
Meanwhile, the coupling unit 110 of the housing 100 includes the first insertion recess 112 of which the inner wall surface is extended by the length of the light source unit 300 (that is, extended in the first direction). The light source includes a light source safe holder contacting directly with a light source and having the light source seated therein, and includes the first coupling unit 310 a and the second coupling unit 320 a which come in surface contact with the inner wall surface of the first insertion recess 112 formed in the coupling unit 110. Here, the light source safe holder signifies the light emitting recess in which the light emitting diodes are disposed and signifies the lower part of the light source unit 300 in which the light emitting recess is formed.
When the lighting device is operated, heat generated from the light source safe holder is released to the coupling unit 110 through the first coupling unit 310 a and the second coupling unit 320 a. In this case, the first coupling unit 310 a and the second coupling unit 320 a come in surface contact with the inner wall surface of the first insertion recess 112, so that the heat generated from the light source safe holder can be transferred to the coupling unit 110. Here, since the inner wall surface of the first insertion recess 112 is extended by the length of the light source unit 300 (that is, extended in the first direction), a maximum contact area of the first coupling unit 310 a and the second coupling unit 320 a is obtained. As a result, it is possible to improve the heat radiating effect of the lighting device.
Meanwhile, the lower parts of the first body 310 and the second body 320 are manufactured to have sloping surfaces toward the reflector 200. Therefore, regarding a cross section of the light source unit 300 formed by coupling the first body 310, the second body 320 and the middle body 330, the width of the lower part of the light source unit 300 is greater that of the upper part of the light source unit 300. For example, the cross section of the light source unit 300 has a fan shape or a polygon shape and the like. However, the cross section of the light source unit 300 can have various shapes without being limited to the shapes mentioned above.
4) Spring 340
A spring 340 is disposed in the upper part or in the middle part of the middle body 330. For example, as shown in FIG. 17b , the spring 340 can have a ‘
’-shape and can be disposed between the lower part 330 a and the upper part 330 b of the middle body 330. When the first body 310 and the second body 320 are coupled to each other on both sides of the middle body 330, the spring 340 is disposed contacting with the inner surfaces of the first body 310 and the second body 320.
The spring 340 provides the first body 310 and the second body 320 with an elastic force widening a space between the first body 310 and the second body 320. That is, the spring 340 is disposed between the first body 310 and the second body 320 and performs a function of pushing outward the first body 310 and the second body 320. Accordingly, when the light source unit 300 is inserted into the coupling member 110, the projections formed in the upper ends of the first body 310 and the second body 320 are strongly coupled to the first insertion recess 112 of the coupling member 110 by the force from the spring 340.
5) First Connection Terminal 120 and Second Connection Terminal 336
FIG. 20 is a perspective view of a coupling of a first connection terminal 120 and a second connection terminal 336 of the lighting device in accordance with the embodiment 2 of the present invention.
Referring to FIG. 20, the first connection terminal 120 is formed in the first insertion recess 112 of the coupling member 110. The second connection terminal 336 coupled to the first connection terminal 120 is formed on the middle body 330 of the light source unit 300.
The first and the second connection terminals 120 and 336 are coupled to each other by inserting the light source unit 300 into the first insertion recess 112.
The first connection terminal 120 includes a first female block 121 a and a second female block 121 b and without being limited to this, the first connection terminal 120 can include at least one pair of the female blocks. For example, the first female block 121 a includes a pair of a first terminal 123 a and a second terminal 123 b and another pair of a third terminal 123 c and a fourth terminal 123 d. The second female block 121 b includes a pair of a fifth terminal 123 e and a sixth terminal 123 f and another pair of a seventh terminal 123 g and an eighth terminal 123 h.
The second connection terminal 336 includes a first male block 336 a and a second male block 336 b and without being limited to this, the first connection terminal 120 can include at least one pair of the male blocks.
For example, the first male block 336 a includes a pair of a first socket 336 a and a second socket 336 b and another pair of a third socket 337 c and a fourth socket 337 d. The second male block 336 b includes a pair of a fifth socket 337 e and a sixth socket 337 f and another pair of a seventh socket 337 g and an eighth socket 337 h.
The first male block 336 a and the second male block 336 b are symmetrical to each other. That is, the first to the fourth sockets 3373 a to 337 d and the fifth to the eighth sockets 337 e to 337 h are symmetrical with respect to a line between the first male block 336 a and the second male block 336 b.
The polarities of the first to the eighth sockets 337 a to 337 h can be various formed depending on the polarities of the first to the eighth terminals 123 a to 123 h.
When the light source unit 300 is coupled to the coupling member 110 in the first direction, the first connection terminal 120 is electrically and physically connected to the second connection terminal 336 by inserting the first and the second terminals 123 a and 123 b into the first and the second sockets 337 a and 337 b, inserting the third and the fourth terminals 123 c and 123 d into the third and the fourth sockets 337 c and 337 d, inserting the fifth and the sixth terminals 123 e and 123 f into the fifth and the sixth sockets 337 e and 337 f, inserting the seventh and the eighth terminals 123 g and 123 h into the seventh and the eighth sockets 337 g and 337 h.
In addition, when the light source unit 300 is coupled to the coupling member 110 in a second direction (that is, a reverse direction to the first direction), the first connection terminal 120 is electrically and physically connected to the second connection terminal 336 by inserting the first and the second terminals 123 a and 123 b into the seventh and the eighth sockets 337 g and 337 h, inserting the third and the fourth terminals 123 c and 123 d into the fifth and the sixth sockets 337 e and 337 f, inserting the fifth and the sixth terminals 123 e and 123 f into the third and the fourth sockets 337 c and 337 d, inserting the seventh and the eighth terminals 123 g and 123 h into the first and the second sockets 337 a and 337 b.
As such, since the structures and polarities of the first connection terminal 120 and the second connection terminal 336 are symmetrical to each other, it is possible to connect the light source unit 300 to the coupling member 110 irrespective of the coupling direction. Accordingly, the lighting device according to the embodiment 2 makes it easier to couple the light source unit 300 to the coupling member 110, enhancing a convenience for use thereof.
6) Limit Switch 337
A limit switch 337 is provided on both sides of the middle body 330. The limit switch 337 is in an on-state or in an off-state as the first body 310 and the second body 320 move toward the middle body 330. The limit switch is hereby configured in such a manner as to connect or disconnect the electric power supplied to the light emitting diode module. The detailed description of the limit switch 337 will be described later.
5. Coupling and Separation of Light Source Unit 300 and Coupling Member 110
FIGS. 22 and 23 show a coupling and separation process of a light source unit 300 and a coupling member 110 in accordance with an embodiment 2 of the present invention.
First, as shown in FIG. 22, an angle between the first body 310 and the second body 320 is reduced by applying a first force F to the first body 310 and the second body 320 of the light source unit 300. Here, the direction of the first force F is reverse to the direction of the elastic force applied by the spring 340. When the lower parts of the first and the second coupling units 310 a and 320 a are pressed by applying the first force F, a space between the first and the second coupling units 310 a and 320 a is reduced, so that an angle between the first body 310 and the second body 320 is reduced.
If the first force F is not applied, a space between the first body 310 and the second body 320 is widened by the elastic force applied by the spring 340, so that it is difficult to insert the light source unit 300 into the first insertion recess 112 of the coupling member 110.
Next, as the first force F is applied to the first and the second bodies 310 and 320, the light source unit 300 is inserted into the first insertion recess 112 of the coupling member 110.
As shown in FIG. 23, if the first force F is not applied, a space between the first and the second bodies 310 and 320 is widened again, so that the projection is inserted into the third recess 113 formed on the inner surface of the first insertion recess 112. As a result, the light source unit 300 can be coupled to the coupling member 110.
When the light source unit 300 is inserted into the coupling member 110, the spring 340 disposed between the first body 310 and the second body 320 pushes the first body 310 and the second body 320, causing the projections to be more securely coupled to the third recess 113.
The spring 340 gives continuously a uniform pressure to a contact surface formed by causing the first coupling unit 310 a and the second coupling unit 320 a to be contact with the first insertion recess 112. Therefore, heat generated from the light source unit 300 can be more efficiently transferred through the contact surface mentioned above.
In separating the light source unit 300 from the coupling member 110, after the angle between the first body 310 and the second body 320 is reduced by applying the first force F to the first body 310 and the second body 320, the light source unit 300 is separated from the coupling member 110.
FIG. 24a shows how a mechanical limit switch according to an embodiment 2 is operated. FIG. 24b shows how a sensor type limit switch according to an embodiment 2 is operated.
The limit switch according to the embodiment 2 is able to employ a mechanical limit switch or a sensor type limit switch.
When the first force F is applied to the first and the second bodies 310 and 320, the first and the second bodies 310 and 320 rotate in the direction of the middle body 330, so that the inner surfaces of the first and the second bodies 310 and 320 approach close to both sides of the middle body 330 respectively. When the first and the second bodies 310 and 320 approach close to both sides of the middle body 330 to a certain extent respectively, the limit switch 337 contacts with the first and the second bodies 310 and 320. Here, the limit switch 337 disposed on both sides of the middle body 330 is pressed through the use of button by the first and the second bodies 310 and 320 and becomes in an off-state. In this case, the limit switch 337 is capable of electrically separating the second connection terminal 336 from the light emitting diode module.
Next, after the light source unit 300 is completely coupled to the coupling member 110, a distance between the first body 310 and the second body 320 is increased. As a result, the limit switch 337 becomes in an on-state, so that the second connection terminal 336 may be electrically connected again to the light emitting diode module.
When the first force F is applied to the first and the second bodies 310 and 320, the first and the second bodies 310 and 320 rotate in the direction of the middle body 330, so that the inner surfaces of the first and the second bodies 310 and 320 approach close to both sides of the middle body 330 respectively. Here, the limit switch 337 disposed on both sides of the middle body 330 detects the motions of the first and the second bodies 310 and 320.
There are two kinds of the aforementioned detecting method. One is a method using the intensity of pressure applied by the first and the second bodies 310 and 320 and the other is a method using a magnetic field intensity measured from the first and the second bodies 310 and 320.
The limit switch 337 using the intensity of pressure may include a pressure sensor. Such a limit switch 337 measures the intensity of pressure applied by the first and the second bodies 310 and 320. If the measured intensity of pressure is greater than a predetermined intensity of pressure, the limit switch 337 becomes in an off-state. Here, the limit switch 337 recognizes that the light source is replaced and may generate a control signal for disconnecting the electric power supplied to the light source 300.
Subsequently, when the first connection terminal 120 is connected to the second connection terminal 336, the control signal generated by the limit switch 337, as shown in FIG. 141b , may be output to the power supply unit 400 through the first connection terminal 120 and the second connection terminal 336. As a result, the power supply unit 400 is hereby able to disconnect the electric power output based on the control signal.
After the light source 300 is completely coupled to the coupling member 110, as the first force F is decreased, a distance between the limit switch 337 and both the first and the second bodies 310 and 320 is increased. Since the first and the second bodies 310 and 320 are further from the limit switch 337, the intensity of pressure applied by the first and the second bodies 310 and 320 becomes lower than a predetermined intensity of pressure. In this case, the limit switch 337 becomes in an on-state, the control signal is not output. In such a case, the second connection terminal 336 may be electrically connected again to the light emitting diode module.
The limit switch 337 using the magnetic field intensity may include a magnetic sensor. The limit switch 337 using the magnetic field intensity has the same electrical operation method as that of the limit switch 337 using the pressure sensor. However, in case of the limit switch 337 using the magnetic sensor, a magnet is provided on the inner surfaces of the first and the second bodies 310 and 320. The position of the magnet corresponds to the position of the magnetic sensor. Accordingly, it is possible to measure the magnetic field intensity according to a distance between the middle body 330 and the first and the second bodies 310 and 320.
The limit switch 337 using the magnetic sensor is able to recognize the existence, approach and location of an object through a non contact method. The limit switch 337 using the non contact method may be produced by using various proximity sensors as well as the aforementioned magnetic sensor.
Meanwhile, the middle body 330 may include a separate power supply for starting and operating the limit switch 337.
According to the embodiment 2, when the light source unit 300 is required to be disposed or replaced for maintenance, it is possible to safely attach or remove the light source unit 300 by using the limit switch 337 even though the lighting device is in a live status.
FIGS. 25 and 26 are cross sectional views of a light source unit 300 and a coupling member 110 of a lighting device in accordance with a modified embodiment of the present invention. In description of the lighting device according to a modified embodiment, repetitive descriptions thereof will be omitted.
Referring to FIGS. 25 and 26, the plurality of the third recesses 113 a, 113 b and 113 c are formed on the inner surface of the first insertion recess 112 of the coupling member 110 of the lighting device. While the three third recesses 113 a, 113 b and 113 c are shown, there is no limit to the number of the third recesses.
The light source unit 300 is inserted into and coupled to the first insertion recess 112. Here, the projection of the upper part of the light source unit 300 is inserted into one of the plurality of the third recesses 113 a, 113 b and 113 c, so that the light source unit 300 is strongly coupled to the coupling member 110.
As shown in FIG. 25, depths of the plurality of the third recesses 113 a, 113 b and 113 c are different from each other, it is possible to diversely adjust the light distribution of the lighting device in accordance with one of the plurality of the third recesses 113 a, 113 b and 113 c into which the projection of the light source unit 300 is inserted.
As shown in FIG. 26, the first insertion recess 112 has a sloping inner surface. When a plurality of the third recesses 113 a, 113 b and 113 c are formed on the sloping inner surface of the first insertion recess 112, an angle between the first body 310 and the second body 320 of the light source unit 300 varies in accordance with one of a plurality of the third recesses 113 a, 113 b and 113 c into which the projection of the light source unit 300 is inserted. Therefore, it is possible to diversely adjust the light distribution of the lighting device.
As described above, it is possible to diversely adjust the light distribution of the lighting device by forming a plurality of the third recesses 113 a, 113 b and 113 c on the inner surface of the first insertion recess 112. As a result, even though a width or curvature of the reflector 200 changes, it is possible to provide an efficient lighting without changing the light source unit 300.
a housing including an upper surface and an inner wall surface;
a coupling member coupled to the upper surface of the housing;
a reflector disposed between the coupling member and the inner wall surface of the housing;
a light source unit coupled to the coupling member and having a light emitting groove in which a light emitting device is disposed,
wherein the reflector is disposed over the light emitting groove,
wherein the light source unit comprises a projection part disposed around the light emitting groove, and
wherein the projection part is provided a prescribed distance from the upper surface, the prescribed distance being greater than or equal to a distance of an end of the housing from the upper surface.
2. The lighting device of claim 1, wherein the light emitting groove includes a basal surface and at least two side surfaces, and wherein the basal surface is sloped and faces the reflector.
3. The lighting device of claim 2, wherein the light source unit further comprises:
a substrate which is disposed on the basal surface and the light emitting device is disposed on the substrate; and
an optical structure which is disposed on the light emitting device and is disposed between the two side surfaces.
4. The lighting device of claim 3, wherein the optical structure comprises a phosphor luminescent film.
5. The lighting device of claim 1, wherein the light emitting groove includes at least two side surfaces, at least one of the two side surfaces being curved.
6. The lighting device of claim 1, wherein a light distribution angle of light emitted from the light emitting groove is from 90° to 110°.
7. The lighting device of claim 1, wherein the light emitting groove includes a basal surface that is sloped and faces the reflector.
a coupling member disposed in the housing, having a recess, and comprising a first surface and a second surface which are disposed in the recess; and
a light source unit comprising a first body and a second body,
wherein each of the first surface and the second surface has a first recess and a second recess which is disposed under the first recess,
wherein each of the first body and the second body comprises a coupling unit coupled to the coupling member,
wherein the coupling unit comprises a projection being inserted into at least one of the first recess and the second recess.
9. The lighting device of claim 8, wherein a depth of the first recess is differ from a depth of the second recess.
10. The lighting device of claim 8, wherein the first surface and the second surface face each other.
11. The lighting device of claim 10, wherein the first surface and the second surface are sloped.
12. The lighting device of claim 8, wherein the coupling unit further comprises an outer surface, wherein the projection is projected from an one end of the outer surface, and wherein at least one portion of the outer surface is contacted with the first surface and second surface.
13. The lighting device of claim 8, wherein each of the first surface and the second surface further has a third recess disposed under the second recess.
14. The lighting device of claim 8, further comprising a spring disposed between the first body and the second body, wherein the spring pushes outward the first body and the second body.
15. The lighting device of claim 8, wherein the coupling member further comprises at least one outer surface, and wherein the outer surface comprises an uneven structure.
a housing comprising an upper surface, a first side surface, a second side surface facing the first side surface, a third side surface and a fourth side surface facing the third side surface;
a coupling member coupled to the upper surface, having a recess, and comprising a first end coupled to the first side surface and a second end coupled to the second side surface;
a reflector comprising a first reflector coupled between the third side surface and the coupling member and a second reflector coupled between the fourth side surface and the coupling member;
a light source unit coupled to the coupling member and comprising a first end coupled to the first side surface and a second end coupled to the second side surface,
wherein the light source unit comprises a first lighting module emitted lights to the first reflector and a second lighting module emitted lights to the second reflector.
17. The lighting device of claim 16, wherein the light source unit further comprises a third lighting module disposed between the first lighting module and the second lighting module, and wherein the third lighting module emits lights to outside of the housing directly.
18. The lighting device of claim 16, wherein the housing has an opening such that light radiated from the light source unit is reflected to be emitted by the reflector.
19. The lighting device of claim 16, further comprising a power supply unit disposed between the first reflector and the third side surface.
20. The lighting device of claim 16, further comprising a coupling frame coupled to an outer surface of the housing.
US14/508,102 2009-08-19 2014-10-07 Lighting device Active 2030-11-21 US9429278B2 (en)
US12/805,796 US8534865B2 (en) 2009-08-19 2010-08-19 Lighting device
US20150077992A1 US20150077992A1 (en) 2015-03-19
US9429278B2 true US9429278B2 (en) 2016-08-30
EP (3) EP2287520B1 (en)
JP (4) JP5669480B2 (en)
CN (5) CN104633500B (en)
WO2011161623A1 (en) * 2010-06-25 2011-12-29 Koninklijke Philips Electronics N.V. Lighting device
KR101064760B1 (en) 2011-05-27 2011-09-15 주식회사 유니테스트 Lighting apparatus for street lamp
EP3008379B1 (en) 2013-05-28 2017-04-05 Philips Lighting Holding B.V. A lighting device assembly and a method of mounting a lighting device assembly
JP6149559B2 (en) * 2013-07-09 2017-06-21 レシップホールディングス株式会社 Led lamp
JP6194787B2 (en) * 2013-12-20 2017-09-13 レシップホールディングス株式会社 Led lamp
CN103807673B (en) * 2014-01-24 2016-03-02 区其富 A lamp lighting and decorative pieces
DE202014100846U1 (en) 2014-02-25 2014-03-27 LDV Laser- und Lichtsysteme GmbH Lighting device for large surface inspection of components
DE202014101984U1 (en) * 2014-04-28 2015-07-30 Zumtobel Lighting Gmbh Modular ceiling luminaire
TW201814204A (en) * 2016-09-23 2018-04-16 Lextar Electronics Corp Lampshade, lamp applying the same and lamp frame
JP6407317B2 (en) * 2017-01-30 2018-10-17 三菱電機株式会社 A light source unit and an illumination device
DE2737766A1 (en) 1976-09-07 1978-03-16 Treffers Willem M Lampengehaeuse plus certain profilstueck
EP0539621A1 (en) 1991-10-31 1993-05-05 Siemens Aktiengesellschaft Indoor modular lighting system
JP2006236673A (en) 2005-02-23 2006-09-07 Matsushita Electric Works Ltd Lighting apparatus
GB2442013A (en) 2006-09-21 2008-03-26 Hogarth Fine Art Ltd A lamp with repositionable LEDs
DE102005053304A1 (en) 2005-11-09 2008-04-10 Thomas Frener LED cover reflector for e.g. garden shelter, refracts LED light on reflector surface to uniformly distribute LED light in area, and illuminant fastened by lockable latch to reflector and exchanged
CN101463960A (en) 2007-12-19 2009-06-24 斯坦雷电气株式会社 Lamp and its manufacturing method
US8057061B2 (en) 2008-02-19 2011-11-15 Sanvo Electric Co., Ltd. Showcase
JP3126166U (en) * 2006-06-13 2006-10-19 三和サインワークス株式会社 Signs of the light source unit and the internally illuminated sign
2010-08-19 CN CN 201010520982 patent/CN102042522B/en active IP Right Grant
2010-08-19 CN CN 201010262262 patent/CN101994940B/en active IP Right Grant
JP2009516330A (en) 2005-11-11 2009-04-16 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Lighting instrument having a Led
US8449138B2 (en) * 2009-08-19 2013-05-28 Lg Innotek Co., Ltd. Lighting device
Chinese Office Action issued in related Application No. 201010520982.9 dated Jan. 13, 2014.
Corrected Notice of Allowability issued in U.S. Appl. No. 14/016,680 dated Sep. 3, 2014.
European Search Report issued in Application No. 10173430.9 dated Jun. 24, 2014.
Japanese Office Action issued in Application No. 2014-154968 dated Apr. 21, 2015. (No English Translation).
Japanese Office Action issued in related Application No. 2010-184365 dated Apr. 22, 2014.
Japanese Office Action issued in related Application No. 2010-184370 dated Apr. 22, 2014.
Notice of Allowance dated Jul. 7, 2014 issued in U.S. Appl. No. 14/016,680.
Partial European Search Report issued in related Application No. 10173422.6 dated Jan. 30, 2014.
Partial European Search Report issued in related Application No. 10173430.9 dated Jan. 27, 2014.
U.S. Office Action issued in U.S. Appl. No. 14/016,680 dated Nov. 21, 2013.
United States Final Office Action dated Apr. 11, 2012 issued in U.S. Appl. No. 12/805,796.
United States Final Office Action dated Mar. 11, 2013 issued in U.S. Appl. No. 12/805,796.
United States Final Office Action issued in U.S. Appl. No. 14/016,680 dated May 2, 2014.
United States Office Action dated Nov. 18, 2011 issued in U.S. Appl. No. 12/805,796.
United States Office Action dated Oct. 2, 2012 issued in U.S. Appl. No. 12/805,796.
US8534865B2 (en) 2013-09-17
JP5625203B2 (en) 2014-11-19 led lighting device comprising a block assembly structure