LED LIGHTING SYSTEM

• US 20100128472A1
• Filed: 11/21/2008
• Published: 05/27/2010
• Est. Priority Date: 11/21/2008
• Status: Active Grant

• Current Assignee: B/E Aerospace, Inc. (Rtx Corporation)
• Original Assignee: B/E Aerospace, Inc. (Rtx Corporation)
• Inventors: Hancock, Gary, Johannessen, Eric
• Granted Patent: US 8,476,844 B2
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/28 using temperature feedback
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/46 having LEDs disposed in parallel lines
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A lighting apparatus comprising a white LED and a RGB LED disposed on a mounting and at least partially enclosed by a housing. The RGB LED produces red, green and blue components of light. A white LED driver controls current to the white LED and a RGB LED driver controls current to the RGB LED. A lighting system including the lighting apparatus and a system controller having a memory in which preset lighting programs are stored. A method for method for providing wash lighting comprising the steps of emitting a current color and intensity from a white LED and from a RGB LED, receiving data representing a change of color and intensity from the current color and intensity for at least the RGB LED and emitting white light that is on the Planckian locus in the CIE 1931 chromaticity diagram.

Claims

1. A lighting apparatus, the apparatus comprising:

a white LED and a RGB LED disposed on a mounting and at least partially enclosed by a housing, the RGB LED producing red, green and blue components of light;

a first LED driver controlling current to the white LED;

a second LED driver controlling current to the RGB LED; and

a microcontroller electrically connected to the first and second LED drivers.

2. The apparatus of claim 1 further comprising a DC/DC converter.

3. The apparatus of claim 2, wherein the mounting is a printed circuit board.

4. The apparatus of claim 2, wherein the RGB LED is a chip.

5. The apparatus of claim 2, wherein the housing is aluminum alloy.

6. The apparatus of claim 2 further comprising a polycarbonate lens.

7. The apparatus of claim 2 further comprising a transceiver including a logic-selectable termination resistor.

8. The apparatus of claim 2, wherein the second LED driver is a three channel constant current LED driver.

9. The apparatus of claim 8 wherein the second LED driver further comprises a first 10-bit register that receives data for a red component of the light emitted by the RGB LED.

10. The apparatus of claim 9 wherein the second LED driver further comprises a second 10-bit register that receives data for a green component of the light emitted by the RGB LED.

11. The apparatus of claim 10 wherein the second LED driver further comprises a third 10-bit register that receives data for a blue component of the light emitted by the RGB LED.

12. The apparatus of claim 11 wherein the second LED driver further comprises a plurality of 7-bit registers.

13. A lighting system, the system comprising:

a lighting apparatus comprising;

a white LED and a RGB LED disposed on a mounting and at least partially enclosed by a housing, the RGB LED producing red, green and blue components of light;

a first LED driver controlling current to the white LED;

a second LED driver controlling current to the RGB LED; and

a microcontroller electrically connected to the first and second LED drivers; and

a system controller including a memory storing preset lighting programs.

14. The system of claim 13, wherein the lighting apparatus is addressable.

15. The system of claim 14 further comprising a master controller that communicates control signals to the system controller.

16. The system of claim 14 wherein the lighting apparatus is a plurality of lighting apparatus connected in series.

17. The system of claim 14 wherein the memory stores fault data.

18. A method for providing wash lighting, the method comprising the steps of:

emitting a current color and intensity from a white LED and from a RGB LED;

receiving data representing a change of color and intensity from the current color and intensity of at least the RGB LED; and

emitting white light that is on the Planckian locus in the CIE 1931 chromaticity diagram.

19. The method of claim 18 further comprising the step of dimming the emitted light.

20. The method of claim 19 further comprising the steps of receiving and storing in a memory lighting system fault data and providing the fault data electronically to a master controller.