FLAT PANEL LIGHTING DEVICE AND DRIVING CIRCUITRY
The present application is directed to a lighting fixture having a light emitting diode (LED) panel. The light fixture is configured to include a pair of LED configurations that are driven alternately by driving circuitry. The light fixture can include driving circuitry that is configured to be housed within a frame of the LED panel.
1 . A light fixture comprising:
a frame;
a light emitting diode (LED) panel disposed within the frame; and
power circuitry disposed within the frame, the power circuitry being configured to electrically couple the substantially flat LED panel to an external power supply.
2 . The light fixture of claim 1 , wherein power circuitry is sized to be positioned within a channel defined by the frame.
3 . The light fixture of claim 1 , wherein the power circuitry includes driving circuitry configured to convert an AC input into a DC output suitable for powering the LED panel.
4 . The light fixture of claim 1 , wherein the power circuitry has a length and a width, wherein the length-to-width ratio is at least 5 to 1.
5 . The light fixture of claim 1 , wherein the power circuitry has a length and a width, wherein the length-to-width ratio is at least 10 to 1.
6 . The light fixture of claim 1 , wherein at least a portion of the frame defines a first channel configured to support the power circuitry.
7 . The light fixture of claim 6 , wherein at least a portion of the frame is configured to support an array of LEDs disposed adjacent an edge of the frame.
8 . The light fixture of claim 7 , wherein the first channel is configured to support the array of LEDs.
9 . The light fixture of claim 7 , wherein at least a portion of the frame defines a second channel configured to support the array of LEDs.
10 . The light fixture of claim 7 , wherein at least a portion the frame is configured to support electrical connectors between the power circuitry and the array of LEDs.
11 . The light fixture of claim 10 , wherein the power circuitry includes an array of circuit modules supported by the first channel.
12 . The light fixture of claim 6 , wherein the first channel has a height of no more than about 0.5 inches.
13 . The light fixture of claim 9 , wherein the first channel has a width of no more than about 1.0 inches.
14 . The light fixture of claim 6 , wherein at least a portion of the frame defines a second channel configured to support the power circuitry
15 . The light fixture of claim 14 , wherein at least a portion of the frame defines a third channel configured to support an array of LEDs disposed adjacent to an edge of the frame.
16 . The light fixture of claim 1 , wherein the LED panel is edge lit.
17 . The light fixture of claim 1 , wherein the LED panel includes a plurality of LEDs disposed adjacent at least one edge of the frame.
18 . The light fixture of claim 1 , wherein the frame is rectangular and the LED panel includes an array of LEDs incorporated into at least two sides of the frame.
19 . The light fixture of claim 1 , wherein the LED panel includes:
an optically-transmissive panel; and
an array of LEDs disposed adjacent at least one edge of the frame and disposed adjacent the optically transmissive panel.
20 . The light fixture of claim 1 , wherein the LED panel includes:
an optically-transmissive panel; and
an array of LEDs disposed across a first surface of the optically-transmissive panel.
21 . The light fixture of claim 20 , wherein the array of LEDs is disposed across substantially the entire first surface of the optically-transmissive panel.
22 . The light fixture of claim 1 , wherein the frame of the light fixture has a thickness of no more than about 0.5 inches.
23 . The light fixture of claim 1 , wherein the frame of the light fixture has a thickness of no more than about 1.0 inches.
24 . The light fixture of claim 1 , wherein the frame is rectangular and the LED panel includes:
a light guide plate;
a first array of LEDs incorporated into a first side of the frame adjacent a first side of the light guide plate, the first array of LEDs emitting light focused along a first direction;
a second array of LEDs incorporated into a second side of the frame adjacent a second side of the light guide plate, the second array of LEDs emitting light focused along a second direction that is opposite the first direction;
a first brightness enhancement film (BEF) positioned adjacent the light guide plate and configured to collimate light emitted by the first array of LEDs; and
a second BEF positioned adjacent the first BEF and configured to collimate light emitted by the second array of LEDs.
25 . The light fixture of claim 1 , wherein the power circuitry includes a controller configured to control the intensity of the light emitted by the LED panel.
26 . The light fixture of claim 1 , wherein the LED panel includes:
a first configuration of LEDs; and
a second configuration of LEDs.
27 . The light fixture of claim 26 , wherein the power circuitry is configured to power the first configuration of LEDs for a first time period and to power the second configuration of LEDs for a second time period equal to the first time period.
28 . The light fixture of claim 26 , wherein the LED panel includes a third configuration of LEDs; and wherein the power circuitry is configured to power the first configuration of LEDs for a first time period, to power the second configuration of LEDs for a second time period equal to the first time period, and to power the third configuration of LEDs for a third time period equal to the first time period.
29 . The light fixture of claim 26 , wherein the power circuitry is configured to alternatively power the first configuration of LEDs and the second configuration of LEDs over a cyclical time period including the first time period and the second time period.
30 . The light fixture of claim 26 , wherein the first configuration of LEDs and the second configuration of LEDs are arranged in a single row in an alternating arrangement.
31 . The light fixture of claim 26 , wherein the first configuration of LEDs is arranged in a first row and the second configuration of LEDs is arranged in a second row adjacent the first row.
32 . The light fixture of claim 26 , wherein the first configuration of LEDs and the second configuration of LEDs are arranged in a pair of rows, wherein each row of the pair of rows includes the first configuration of LEDs and the second configuration of LEDs arranged in an alternating arrangement
33 . The light fixture of claim 26 , wherein first configuration of LEDs includes a first array on a first side of the frame and a second array on a second side of the frame opposite the first side of the light frame.
34 . The light fixture of claim 33 , wherein the second configuration of LEDs includes a third array on a third side of the frame and a fourth array on a fourth side of the frame opposite the third side of the light frame.
35 . The light fixture of claim 26 , wherein the first configuration of LEDs includes a first array on a first side of the frame and a second array on a second side of the frame adjacent the first side of the light frame.
36 . The light fixture of claim 35 , wherein the second configuration of LEDs includes a third array of LEDs on a third side of the frame opposite the first side of the frame and a fourth array of LEDs on a fourth side of the frame opposite the second side of the frame.
37 . The light fixture of claim 26 , wherein the power circuitry comprises a first LED driver operatively coupled to the first configuration of LEDs and a second LED driver operatively coupled to the second configuration of LEDs.
38 . The light fixture of claim 37 , wherein the first LED driver is configured to selectively power the first configuration of LEDs and the second LED driver is configured to selectively power the second configuration of LEDs
39 . The light fixture of claim 37 , wherein the power circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to control the first LED driver and the second LED driver to power the first configuration of LEDs for a first time period and to power the second configuration of LEDs for a second time period equal to the first time period.
40 . The light fixture of claim 37 , wherein the power circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to monitor failure of the first LED driver and the second LED driver.
41 . The light fixture of claim 26 , wherein the power circuitry comprises a first LED driver operatively coupled to the first configuration of LEDs and the second configuration of LEDs, and a second LED driver operatively coupled to the first configuration of LEDs and the second configuration of LEDs.
42 . The light fixture of claim 41 , wherein the first LED driver is configured to selectively power the first configuration of LEDs and the second configuration of LEDs, and the second LED driver is configured to selectively power the first configuration of LEDs and the second configuration of LEDs.
43 . The light fixture of claim 41 , wherein the power circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to control the first LED driver and the second LED driver to power the first configuration of LEDs for a first time period and to power the second configuration of LEDs for a second time period equal to the first time period.
44 . The light fixture of claim 41 , wherein the power circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to monitor failure of the first LED driver and the second LED driver.
45 . The light fixture of claim 44 , wherein the controller is configured to selectively activate the second LED driver to power the first configuration of LEDs and the second configuration of LEDs upon detection of failure or malfunction by the first LED driver.
46 . A light fixture comprising:
a first set of light emitting diodes (LEDs);
a second set of light emitting diodes (LEDs);
an optically transmissive panel, each of the first set of LEDs and the second set of LEDs being disposed adjacent to an edge of the optically transmissive panel; and
driving circuitry operatively coupled to the first set of LEDs and the second set of LEDs and an associated power supply, wherein the driving circuitry is configured to selectively power the first set of LEDs and the second set of LEDs in an alternating manner.
47 . The light fixture of claim 46 , wherein the driving circuitry is configured to power the first set of LEDs for a first time period and to power the second set of LEDs for a second time period equal to the first time period.
48 . The light fixture of claim 46 , further comprising a third set of light emitting diodes (LEDs), wherein the driving circuitry is configured to power the first set of LEDs for a first time period, to power the second set of LEDs for a second time period equal to the first time period, and to power the third set of LEDs for a third time period equal to the first time period.
49 . The light fixture of claim 46 , wherein the first set of LEDs and the second set of LEDs are arranged in a single row in an alternating arrangement.
50 . The light fixture of claim 46 , wherein the first set of LEDs is arranged in a first row and the second set of LEDs is arranged in a second row adjacent the first row.
51 . The light fixture of claim 46 , wherein the first set of LEDs and the second set of LEDs are arranged in a pair of rows, wherein each row of the pair of rows includes the first set of LEDs and the second set of LEDs arranged in an alternating arrangement
52 . The light fixture of claim 46 , wherein the first set of LEDs is arranged in a row on a first side of the optically transmissive panel and the second set of LEDs is arranged in a row on a second side of the optically transmissive panel opposite the first side of the optically transmissive panel.
53 . The light fixture of claim 46 , wherein the driving circuitry comprises a first LED driver operatively coupled to the first set of LEDs and a second LED driver operatively coupled to the second set of LEDs.
54 . The light fixture of claim 53 , wherein the driving circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to control the first LED driver and the second LED driver to power the first set of LEDs for a first time period and to power the second set of LEDs for a second time period equal to the first time period.
55 . The light fixture of claim 53 , wherein the driving circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to monitor failure of the first LED driver and the second LED driver.
56 . The light fixture of claim 55 , wherein the controller is configured to activate the second LED driver to power the first set of LEDs and the second set of LEDs upon detection of failure of the first LED driver.
57 . The light fixture of claim 46 , wherein the driving circuitry comprises a first LED driver operatively coupled to the first set of LEDs and the second set of LEDs, and a second LED driver operatively coupled to the first set of LEDs and the second set of LEDs.
58 . The light fixture of claim 57 , wherein the first LED driver is configured to selectively power the first set of LEDs and the second set of LEDs, and the second LED driver is configured to selectively power the first set of LEDs and the second set of LEDs.
59 . The light fixture of claim 57 , wherein the driving circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to control the first LED driver and the second LED driver to power the first set of LEDs for a first time period and to power the second set of LEDs for a second time period equal to the first time period.
60 . The light fixture of claim 57 , wherein the driving circuitry includes a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to monitor failure of the first LED driver and the second LED driver.
61 . The light fixture of claim 60 , wherein the controller is configured to selectively activate the second LED driver to power the first set of LEDs and the second set of LEDs upon detection of failure or malfunction by the first LED driver.
62 . A light fixture comprising:
an array of light emitting diodes (LEDs); and
driving circuitry operatively coupled to the array of LEDs, wherein the driving circuitry includes:
a first LED driver selectively operatively coupled to the array of LEDs and a second LED driver selectively operatively coupled to the array of LEDs; and
a controller operatively coupled to the first LED driver and the second LED driver, wherein the controller is configured to selectively activate the second LED driver to power the array of LEDs upon detection of failure or malfunction by the first LED driver.
63 . The light fixture of claim 62 , wherein the controller is configured to selectively activate the first LED driver to power the array of LEDs upon detection of failure of malfunction by the second LED driver.
64 . A light fixture comprising:
a frame;
a light emitting diode (LED) panel disposed within the frame, wherein the LED panel includes:
a first configuration of light emitting diodes (LEDs); and
a second configuration of light emitting diodes (LEDs); and
driving circuitry operatively coupled to the first configuration of LEDs and the second configuration of LEDs, wherein the driving circuitry is configured to selectively power the first configuration of LEDs and the second configuration of LEDs in an alternating manner.
65 . A method for extending rated life of a light emitting diode (LED) light fixture, the LED light fixture having at least one array of LEDs, the method comprising:
providing a first LED driver selectively operatively coupled to the at least one array of LEDs;
providing a second LED driver selectively operatively coupled to the at least one array of LEDs;
electrically coupling the first LED driver to the at least one array of LEDs and;
monitoring the first LED driver for failure, malfunction or reduced performance;
if failure, malfunction or reduced performance is detected for the first LED driver, electrically coupling the second LED driver to the at least one array of LEDs and electrically decoupling the first LED driver from the at least one array of LEDs.
66 . A method of extending rated life of a light emitting diode (LED) light fixture, the method comprising:
providing a first configuration of LEDs;
providing a second configuration of LEDs; and
selectively powering the first configuration of LEDs and the second configuration of LEDs in an alternating manner.