[0001] The present disclosure, in general, relates to light emitting diode (LED) lamps, and particularly to an LED lamp which is capable of providing both normal and emergency illuminations.
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] To resolve the problem of global warming and natural resource exhaustion, low power consuming electrical devices are required. Light emitting diode (LED) lamps are developed to meet the power-saving trend. LED lamps having LEDs are preferable for use to cold cathode fluorescent lamps and other traditional lamps due to the excellent properties, including high brightness, low power consumption, long lifespan, environment friendliness, rapid start-up, directivity, of the LEDs.
[0004] Nowadays, LEDs have been used in both a general lamp for normal illumination and an emergency lamp for emergency illumination. However, the conventional LED-type general lamp is individually designed for normal illumination where an external alternating current (AC) power supply is readily available, without making the most use of an environment illumination enhanced the insufficient normal illumination by auxiliary illumination for energy-saving. The conventional LED-type emergency illumination is typically installed in places such as hallways, stairs, passageways, and other areas needing an emergency illumination, without making the most use of the environment

illumination extended the emergency illumination period by auxiliary illumination for safety. The conventional LED-type emergency illumination is constantly inactive, except when the AC power supply to the conventional LED-type general lamp is interrupted. To equip the same area with both the general and emergency lamps is costly in money and space.
[0005] Therefore, it is desirable to provide an LED lamp which is capable of providing both normal and emergency illuminations.
SUMMARY
[0006] This summary is provided to introduce concepts related to light emitting diode (LED) lamp which is capable of providing both normal and emergency illuminations. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0007] In an embodiment, the present disclosure relates to a light emitting diode (LED) lamp. The lamp includes an optical part arranged at the front end of the LED lamp. The optical part includes a main LED light source and an auxiliary LED light source, where the main LED light source and the auxiliary LED light source being attached to a base of the optical part. The lamp further includes an electric part arranged at a rear end of the LED lamp. The electric part comprising a shell, a driver printed circuit board, and a rechargeable battery received in the shell, the driver printed circuit board forming an AC-to-DC converter, and a battery charging circuit thereon,
[0008] In an aspect, the AC-to-DC converter is to convert an external AC power supply to DC power and to provide a first DC power to a first output end thereof and a second DC power source at a second output end thereof.

[0009] In an aspect, the first output end of the AC-to-DC converter is electrically connected to the main LED light source to provide the first DC power to the main LED light source.
[0010] In an aspect, the second output end of the AC-to-DC converter is electrically connected to the battery charging circuit to feed the second DC power to the rechargeable battery for charging of the connected rechargeable battery, where the rechargeable battery is being electrically connected to the auxiliary LED light source through the battery charging circuit.
[0011] In an aspect, the battery charging circuit includes a switching controlling circuit. The switching controlling circuit is to electrically disconnect the rechargeable battery and the auxiliary LED light source when the external AC power supply is supplied normally to the AC-to-DC converter for providing a normal illumination from the main LED light source, and to electrically connect the rechargeable battery and the auxiliary LED light source through the battery charging circuit when the external AC power supply is interrupted for providing an emergency illumination from the auxiliary LED light source.
[0012] Accordingly, the power supply to the auxiliary LED light source is provided directly from the rechargeable battery, without utilizing the AC-to-DC converter. Such direct power supply reduces the power losses and increases the time span for providing an emergency illumination from the auxiliary LED light source.
[0013] Furthermore, in an aspect, the main LED light source includes a first set of LEDs and the auxiliary LED light source includes a second set of LEDs, where the number of LEDs in the second set of LEDs is less in comparison the LEDs in the first set of LEDs. This, in turn, increases the time span for providing an emergency illumination from the auxiliary LED light source, in comparison to

the conventional LED bulb where the same number of LEDs are provided for the main LED light source and the auxiliary LED light source.
[0014] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
[0016] FIG. 1 illustrates a conventional exemplary block diagram of the electrical power circuit;
[0017] FIG. 2 illustrates the LED lamp 200 in accordance with an embodiment of the present disclosure;
[0018] FIG.3 illustrates substrate with main LED source and an auxiliary LED source of the LED lamp in accordance with an embodiment of the present disclosure;
[0019] FIGS. 4A-4D schematically illustrate multiple perspective views of a shell of an electric part of the LED lamp in accordance with an exemplary embodiment of the present disclosure;
[0020] FIG. 5 illustrates an exemplary block diagram of the electrical power circuit of the LED lamp in accordance with an exemplary embodiment of the present disclosure;

[0021] FIGS. 6A-6C schematically illustrate multiple perspective views of the
LED lamp in assembled condition in accordance with an exemplary embodiment of the present disclosure; and
[0022] FIGS. 7-11 illustrates various schematic views of mounting of the
5 LED lamp in accordance with the present disclosure.
DETAILED DESCRIPTION
[0023] The following is a detailed description of embodiments of the
disclosure depicted in the accompanying drawings. The embodiments are in such
detail as to clearly communicate the disclosure. However, the amount of detail
10 offered is not intended to limit the anticipated variations of embodiments; on the
contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0024] As used in the description herein and throughout the claims that
15 follow, the meaning of “a,” “an,” and “the” includes plural reference unless the
context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0025] The present disclosure aims to solve a technical problem of providing
20 increased time span for emergency illumination using a battery backup light
emitting diode (LED) lamp or device or the like.
[0026] FIG. 1 shows a conventional exemplary block diagram of the electrical
power circuit. As per conventional electrical power circuit, when an external AC
power supply 102 is supplied normally, an AC-to-DC power converter along with
25 battery changing circuit 104 converts the incoming AC power input into DC
power output, and provides a first DC power for common DC powered light emitting diodes (LEDs) 106 to lighten and a second DC power for battery 108
6

under changing/discharging. With such configuration, whenever the incoming AC
power input is interrupted, the AC-to-DC power converter along with battery
changing circuit 104 receiving DC power from battery 108 converts it into AC
power and then reconvert into AC power suitable for the DC powered LEDs 106.
5 Such conversion and reconversion of power from DC to AC and then to DC leads
to power loss while supplying the DC power to the DC powered LEDs 106. This in turn also leads to a reduction in the active time span of the DC powered LEDs 106 when the incoming AC power is interrupted from AC power supply.
[0027] To overcome the issues with the existing circuitry and layout of the
10 control module of conventional LED lamps, the present disclosure herein provides
a light emitting diode (LED) lamp 200 (FIG. 2) with an improved control module (FIG. 2).
[0028] FIG. 2 shows the LED lamp 200 in accordance with an embodiment of
the present disclosure. The LED lamp 200 of the present disclosure includes an
15 optical part 202 arranged at the front end and an electric part 204 at the rear end.
In an example, the optical part 202 and the electric part 204 are connected with each other using a number of fasteners 206. The fasteners 206 may include but not limited to metal screws, threaded nuts, rivets, and so forth. In another example, the optical part 202 and the electrical part 204 are formed from Poly Butylene
20 terephthalate (PBT) or any suitable material.
[0029] The optical part 202 includes a substrate 208 fitted and positioned in
between the optical part 202 and the electric part 204. In other words, the
substrate 208 separates the optical part 202 from the electrical part 204. In an
example, the substrate 208 is of a circular shape and having a through a hole in
25 the central region, where the through hole corresponds to a through hole of the
LED lamp 200.
7

[0030] In an implementation, as shown in FIG. 3, the substrate 208 may be a
metal core driver PCB 404 (MCPCB) on which a main LED light source 302 and
an auxiliary LED light source 304 is mounted. The main LED light source 302
includes a first set of LEDs and the auxiliary LED light source 304 includes a
5 second set of LEDs. In an example and not to be construed as a limitation, the first
set of LEDs of the main LED light source 302 is being arranged around the
second set of LEDs of the auxiliary LED light source 304. Further, the number of
LEDs in the second set of LEDs is less in comparison to the LEDs in the first set
of LEDs. This in turn increases the time span for providing an emergency
10 illumination from the auxiliary LED light source 304, in comparison to the
conventional LED bulb where the same number of LEDs are provided for the main LED light source and the auxiliary LED light source.
[0031] Returning to the electric part 204, and as shown in FIGS. 4A-4D, the
electric part 204 includes a shell 402 at its base, a driver printed circuit board
15 (PCB) 404 404, and a rechargeable battery 406 received in a battery mounting
portion 408 of the shell 402.
[0032] The shell 402 in its internal side includes four different stands 410-1,
410-2, 410-3, 410-4 formed of PBT at its periphery. These stands 410-1, 410-2,
410-3, 410-4 are used for locking and tightening of the electric part 204 with the
20 optical part 202, by implementing the fasteners 206 through holes provided in
these stands 410-1, 410-2, 410-3, 410-4.
[0033] The shell 402 further includes two stands 412-1, 412-2 for the
mounting of the driver PCB 404 404 inside the shell 402. Further, the shell 402
includes a center stand 414 to eliminate any electrical contact available inside the
25 PBT shell 402 and to eliminate any kind of damage to the assembly of the LED
lamp 200. Adjacent to the center stand 414, two guide stands 416-1, 416-2 are formed to provide guide holes through them for different mounting options of the LED lamp 200. In an example, the center stand 414 and two guide stands 416-1,
8

416-2 is formed with respective grooves at their tops so as to match the slot
formed on the optical part 202 during assembly of the LED lamp 200. In another
example, the center stand 414 and two guide stands 416-1, 416-2 are formed with
side ribs at their bottoms over the base of the shell 402 so as to provide strengthen
5 their mounting and/or connection with the base of the shell 402.
[0034] The shell 402 at its inner side further includes at least three pillars 418
to provide strength to input wire(s) with the concept of wires looping into these pillars 418 the wires(s) will achieve strength over their stretching.
[0035] Additionally, the shell 402 is formed with side cutting over its wall to
10 provide ventilation to components mounted on the printed circuit board 404
during operation of the LED lamp 200.
[0036] Further, in the battery mounting portion 408 of the shell 402, a cut
through section 420 is provided to pass a battery connector 422 from the battery
mounting portion 408 to the printed circuit board 404. Also, as shown in FIG. 4C,
15 a boss 424 is formed near the battery mounting portion 408 to tight a battery cover
with the help of a metal screw and to avoid any metal exposure inside the electric part 204.
[0037] In FIG. 4D. the battery mounting portion 408 from the external side of
the electric part 204 or the shell 402 is shown in an exemplary implementation of
20 the present disclosure. In the battery mounting portion 408, the rechargeable
battery 406 is received and installed with the help of the battery cover and metal screws.
[0038] Further, from the external side of the electric part 204 or the shell 402,
an external power supply wire is inserted through a hole 426.
25 [0039] FIG. 5 shows an exemplary block diagram of the electrical conversion
circuit of control module formed on the driver PCB 404 404 of the LED lamp 200 in accordance with an implementation of the present disclosure. The driver PCB
9

404 404 forms an AC power supply 502, an AC-to-DC converter 504, and a battery charging circuit 506 thereon.
[0040] In an aspect, the AC-to-DC converter 504 is to convert an external AC
power supply received from the AC power supply 502 to DC power and to
5 provide a first DC power to a first output end thereof and a second DC power
source at a second output end thereof. The first output end of the AC-to-DC
converter 504 is electrically connected to the main LED light source 302 to
provide the first DC power to the main LED light source 302. The second output
end of the AC-to-DC convertor 504 is electrically connected to the battery
10 charging circuit 506 to feed the second DC power to the rechargeable battery 406
for charging of the connected rechargeable battery 406. In an implementation, the rechargeable battery 406 is being electrically connected to the auxiliary LED light source 304 through the battery charging circuit 506.
[0041] In an aspect, the battery charging circuit 506 includes a switching
15 controlling circuit (not shown in figures). The switching controlling circuit is to
electrically disconnect the rechargeable battery 406 and the auxiliary LED light
source 304 when the external AC power supply is supplied normally to the AC-to-
DC converter 504 for providing a normal illumination from the main LED light
source 302, and to electrically connect the rechargeable battery 406 and the
20 auxiliary LED light source 304 through the battery charging circuit 506 when the
external AC power supply is interrupted for providing an emergency illumination from the auxiliary LED light source 304.
[0042] Accordingly, the power supply to the auxiliary LED light source 304 is
provided directly from the rechargeable battery 406, without utilizing the AC-to-
25 DC converter 504. Such direct power supply reduces the power losses and
increases the time span for providing an emergency illumination from the
auxiliary LED light source 304.
10

[0043] FIG. 6A illustrates an isometric view of an assembled condition of the
LED lamp 200 in accordance with an exemplary embodiment of the present
disclosure. As can be appreciated by those skilled in the art that although the
center stands 414 and two guide stands 416-1, 416-2 are visible from the optical
5 part 202 of the LED lamp 200 in FIG. 6A, these stands can be terminated within
the inner side of the optical part 202 to improve the visual or esthetical appeal of
the LED lamp 200. An exemplary optical part 202 without the center stand 414
and two guide stands 416-1, 416-2 on its top surface is shown in FIG. 6B. Also,
FIG. 6B illustrates an exemplary electric part 204 of the LED lamp 200 in an
10 assembled condition without limitation to the scope of the present disclosure.
[0044] The assembled LED lamp 200 can be mounted on the ceiling using a
number of mounting options. For example, in FIGS. 7A-7E, the LED lamp 200 is mounted from the rear end on a metallic ceiling plate 702 using a mounting rod 704 having a regular bulb holder fixture at its one end and an external thread on
15 another end. FIG. 7A illustrates an exemplary E26 mounting rod, FIG. 7B
illustrates an exemplary B22 mounting rod, while FIG. 7C illustrates the metallic ceiling plate 702 which is commonly found in the home. As shown in FIGS. 7D-7E, the regular bulb holder fixture end of the mounting rod 704 is attached to the metallic ceiling plate 702, while the other end of the mounting rod 704 is inserted
20 from the rear end in a through hole formed in central axis of the LED lamp 200,
passed from the through hole, and is screwed using a fastener at an external surface of the front end of the LED lamp 200. FIG. 7D shows the stage in which the LED lamp 200 is about to be mounted on the metallic ceiling plate 702 while FIG. 7E shows the stage in which the LED lamp 200 is mounted on the metallic
25 ceiling plate 702.
[0045] In another mounting example shown in FIGS. 8A-8B, the LED lamp
200 is mounted from the rear end on the metallic ceiling plate 702 using at least two magnetic bolts 802-1, 802-2. In an example, threaded sections of the at least
11

two magnetic bolts 802-1, 802-2 are fixed on the rear end of the LED lamp 200,
while head sections of the at least two magnetic bolts 802-1, 802-2 are
magnetically fixed on the metallic ceiling plate 702. FIG. 8A shows the stage in
which the LED lamp 200 is about to be mounted on the metallic ceiling plate 702,
5 while FIG. 8B shows the stage in which the LED lamp 200 is mounted on the
metallic ceiling plate 702.
[0046] In yet another example shown in FIGS. 9A-9C, the LED lamp 200 is
mounted from the rear end on the metallic ceiling plate 702 using at least two
bolts with springs 902-1, 902-2. Threaded sections of the at least two bolts with
10 springs 902-1, 902-2 are fixed on the rear end of the LED lamp 200, while head
sections of the at least two bolts with springs 902-1, 902-2 are fixed on standard grooves formed on the metallic ceiling plate 702.
[0047] In yet another example shown in FIGS. 10A-10C, the LED lamp 200 is
mounted from the rear end on roof/ceiling 1002 (or the metallic ceiling plate 702)
15 using at least two metal screws 1004-1, 1004-2. Threaded sections of the at least
two metal screws 1004-1, 1004-2 are inserted from the front end in corresponding peripheral through holes 1006-1, 1006-2 formed at diametrically opposite direction on the LED lamp 200, passed from the peripheral through holes 1006-1, 1006-2, and is screwed in grooves of roof/ceiling 1002 (or the metallic ceiling
20 plate 702), while head sections of the at least two metal screws 1004-1, 1004-2
rest on an external surface of the top end of the LED lamp 200.
[0048] In yet another example shown in FIGS 11A-11D, the LED lamp 200 is
fixed with a spring assembly 1102. The spring assembly includes a spring base
1102-1 and at least two springs 1102-2 which can be adjusted on the spring base
25 1102-1 based on a recess in a false ceiling or a recessed junction box. As shown in
FIGS. 11C-11D, the at least two springs 1102-2 are mounted at diametrically opposite direction on the rear end for mounting of the LED lamp 200 This spring assembly 1102-2 is moving on an adjustable slide 1102-1 which has self-locking
12

horizontal type gears, as shown in FIGS. 11A-11D, which help in adjusting to the various holes size on the roof where this spring assembly 1102 would be mounted.
[0049] Thus, with the LED lamp 200 and its various mounting options on
ceiling or roof described in the present disclosure, various technical problems of
5 the state of the art are resolved. Also, although a number of exemplary mounting
options are described herein, those skilled in the art can appreciate that the LED lamp 200 can be mounted on the ceiling using any suitable available mounting accessories, without deviating from the scope of the subject matter of the present disclosure.
10 [0050] Further, it will be appreciated that those skilled in the art will be able
to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the invention and are included within its scope.
[0051] Furthermore, all examples recited herein are principally intended
expressly to be only for pedagogical purposes to aid the reader in understanding
15 the principles of the invention and the concepts contributed by the inventor(s) to
furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. Also, the various embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments.
20 [0052] While the foregoing describes various embodiments of the invention,
other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill
25 in the art to make and use the invention when combined with information and
knowledge available to the person having ordinary skill in the art.
13

We claim:

A light emitting diode (LED) lamp (200), comprising:
an optical part (202) arranged at front end of the LED lamp (200), the optical part (202) comprising a main LED light source (302) and an auxiliary LED light source (304), the main LED light source (302) and the auxiliary LED light source (304) being attached to a base of the optical part (302); and
an electric part (204) arranged at a rear end of the LED lamp (200), the electric part (204) comprising a shell (402), a driver printed circuit board (404), and a rechargeable battery (406) received in the shell (402), the driver printed circuit board (404) forming an AC-to-DC converter (504) and a battery charging circuit (506) thereon,
wherein the AC-to-DC converter (504) is to convert an external AC power supply to DC power and to provide a first DC power to a first output end thereof and a second DC power source at a second output end thereof,
Wherein the first output end of the AC-to-DC converter (504) is electrically connected to the main LED light source (302) to provide the first DC power to the main LED light source (302),
wherein the second output end of the AC-to-DC converter (504) is electrically connected to the battery charging circuit (506) to feed the second DC power to the rechargeable battery (406) for charging of the connected rechargeable battery (406), the rechargeable battery (406) is being electrically connected to the auxiliary LED light source (304) through the battery charging circuit (506), and
14

Where in the battery charging circuit (506) comprising a switching controlling circuit, wherein the switching controlling circuit is to:
electrically disconnect the rechargeable battery (406) and the auxiliary LED light source (304) when the external AC power supply is supplied normally to the AC-to-DC converter (504) for providing a normal illumination from the main LED light source (302), and
Electrically connect the rechargeable battery (406) and the auxiliary LED light source (304) through the battery charging circuit (506) when the external AC power supply is interrupted for providing an emergency illumination from the auxiliary LED light source (304).
2. The LED lamp (200) as claimed in claim 1, wherein the main LED light source (302) comprises a first set of LEDs and the auxiliary LED light source (304) comprises a second set of LEDs, the first set of LEDs of the main LED light source (302) being arranged around the second set of LEDs of the auxiliary LED light source (304).
3. The LED lamp (200) as claimed in claim 1, wherein the main LED light source (302) and the auxiliary LED light source (304) are attached on a substrate (208).
4. The LED lamp (200) as claimed in claim 3, wherein the substrate (208) is a metal core printed circuit board (MCPCB) which separates the optical part (202) from the electric part (204).
5. The LED lamp (200) as claimed in claim 4, wherein the optical part (202) from the electric part (204) is formed from Poly Butylene terephthalate (PBT) and are connected with each other using four metal screws (206).
15

6. The LED lamp (200) as claimed in claim 4, wherein the shell (402) in its
internal side comprising:
four different stands (410-1, 410-2, 410-3, 410-4) formed of PBT at its periphery, for locking and tightening of the electric part (204) with the optical part (202) using fasteners (206) through holes provided in the stands (410-1, 410-2, 410-3, 410-4);
Two stands (412-1, 412-2) for the mounting of the driver printed control board (404);
a center stand (414) to eliminate any electrical contact available inside the shell (402) and to eliminate any kind of damage to the assembly of the LED lamp (200);
Two guide stands (416-1, 416-2) formed, adjacent to the center stand with guide holes through them for different mounting options of the LED lamp (200);
At least three pillars (418) to provide strength to input wire(s); and
Side cutting over its wall to provide ventilation to components mounted on the driver printed circuit board (404) during operation of the LED lamp (200).
7. The LED lamp (200) as claimed in claim 6, wherein the LED lamp (200)
is mounted from the rear end on a metallic ceiling plate (702) using a
mounting rod (704) having a regular bulb holder fixture at its one end and
an external thread on another end, and wherein the regular bulb holder
fixture end of the mounting rod (704) is attached to the metallic ceiling
plate (702), while the other end of the mounting rod (704) is inserted from
the rear end in a through hole (414) formed in central axis of the LED
16

lamp (200), passed from the through hole (414), and is screwed using a fastener at an external surface of the front end of the LED lamp (200).
8. The LED lamp (200) as claimed in claim 6, wherein the LED lamp (200) is mounted from the rear end on a metallic ceiling plate (702) using at least two magnetic bolts (802-1, 802-2), and wherein threaded sections of the at least two magnetic bolts (802-1, 802-2) are fixed on the rear end of the LED lamp (200) while head sections of the at least two magnetic bolts (802-1, 802-2) are magnetically fixed on the metallic ceiling plate (702).
9. The LED lamp (200) as claimed in claim 6, wherein the LED lamp (200) is mounted from the rear end on a metallic ceiling plate (702) using at least two bolts with springs (902-1, 902-2), and wherein threaded sections of the at least two bolts with springs (902-1, 902-2) are fixed on the rear end of the LED lamp (200) while head sections of the at least two bolts with springs (902-1, 902-2) are fixed on standard grooves formed on the metallic ceiling plate (702).
10. The LED lamp (200) as claimed in claim 6, wherein the LED lamp (200) is mounted from the rear end on a metallic ceiling plate (702) using at least two metal screws (1004-1, 1004-2), and wherein threaded sections of the at least two metal screws (1004-1, 1004-2) are inserted from the front end in corresponding peripheral through holes (1006-1, 1006-2) formed at diametrically opposite direction on the LED lamp (200), passed from the peripheral through holes (1006-1, 1006-2), and is screwed in grooves of the metallic ceiling plate (702), while head sections of the at least two metal screws (1004-1, 1004-2) rest on an external surface of the top end of the LED lamp (200).
11. The LED lamp (200) as claimed in claim 6, wherein the LED lamp comprises at least two spring mounted attachments (1102) at diametrically
17

opposite direction on the rear end for mounting on a recessed false ceiling or recessed junction box.