Patent Grant
7789526
This invention pertains to a lighting system and, more particularly, to a modular lighting system having a quick disconnect feature.
Lighting fixtures used for illumination as well as for reading or spot lighting are well known in the art. In order to allow for installation, conversion, upgrading, removal and servicing, known designs of lighting systems that are used for individual reading lights depend on specialized plates, loose hardware, and access to the backside of the panel to which the lighting fixture is attached. Currently, these individual lighting systems, which are intended to routinely be moved or removed for servicing or use, are installed using visible hardware such as screws, while a pendant wire harness is used to facilitate electrical connections. Although quite functional, visible screw heads do not provide a clean sleek look.
Conventional lighting systems also often require a separate electrical drive circuit. This drive circuit also depends on loose hardware as well as access to the backside of the panel to facilitate installation. Furthermore, a pendant wire harness with a locking type connector requires the use of two hands to connect or disconnect the halves of the connector. These existing designs, which may be located on, for example, vehicle seats or institutional beds, do not allow the lighting fixture to be moved between locations, or removed for repair or replacement, without partial disassembly of the lighting fixture or the panel to which it is mounted. It is for these reasons that a lighting system that includes a quick interface disconnect from a power module would be an important improvement in the art.
The invention involves a lighting system that is comprised of a housing that surrounds a power module and a control module, where the control module is electrically connected to a protocol module. Although ideally separate, the functionality of the control module, power module and protocol module may also be combined into one module comprising the functionality of all three. A printed circuit board (“PCB”) interface electrically connects the power module to the control module. In the case where the modules are combined into one, the interface PCB may not be required. A light fixture is electrically connected to the PCB interface, and a light source is electrically connected to the light fixture.
The invention involves a lighting system 10 that is used for reading or spot illuminating applications, specifically the invention involves a lighting fixture 24 that includes a quick disconnect mounting feature that permits the relocation of the lighting fixture 24 without rewiring or use of loose hardware.
As shown in
The housing 14 containing the power, control, and protocol modules 16, 18, 20 may be positioned within a furniture cabinet or placed on top of a table or cabinet. In some cases, the power, control and protocol modules may be combined into one module. The housing 14 may also be enclosed in a furnishing so that it is only accessible through a movable cover such as a hinged or sliding door or closure.
In an embodiment, as shown in
In an embodiment, the light fixture 24 includes a collar 28, as shown in
In an embodiment, the housing 14 also contains the controls 26 for the light fixture operation, as shown in
In an embodiment, the quick disconnect module changes the primary way in which the lighting fixture 24 is held in place. The new design uses a two pin bayonet-style attachment 34. This allows secure mounting of the light fixture 24 while maintaining the quick-disconnect requirement. Using pin and socket contacts 24, 30 to make the electrical connections increases the reliability of those connections through proven technology. This style of contact can also be shrouded so that the contacts themselves are shielded from damage and inadvertent shock hazards. The invention also ties the visual, ergonomic and functional design elements together with the lighting fixture 24 head design into one homogeneous unit.
The approximate size of the receptacle 30 is 2″×3″. The collar 28 is approximately 1.5″ in diameter and is shaped for ergonomic operation and concealment of the open connector cover when the lighting fixture 24 has been installed. The collar 28 may be free to rotate about the end of the lighting fixture 24, or it may be rigidly coupled.
When in operation, the housing 14 is positioned either within or on a suitable piece of furniture such as a cabinet or a table. It may also be located remotely and not be assessable or visible to the passenger and a wiring harness can be used to connect the housing 14 to the lighting unit. The housing 14 may be within the furniture in any suitable way a user desires. For example, the housing 14 may be positioned on top of, flushed mounted, or completely enclosed within the furniture. Once located, the power control module 16 is electrically connected to a vehicle or building's power source in any manner known in the art. For example, in an embodiment, the power control module 16 contains electrical drive circuitry that converts aircraft power (example 28 VDC, 12 VDC) to a voltage and current used to drive the electronics in the control module, the protocol module and the lighting modules and is electrically connected to an aircraft's electrical power system in a manner known in the art, thereby providing the power necessary to light the fixture.
The control module 18 houses electrical and electronic circuitry including a microcontroller, LED dimmer and driver and circuitry, analog and digital control circuitry and optionally a communications transceiver and UARTs and is electrically connected to both the protocol module 20 and the power module 16, as shown in
The protocol module 20 houses electrical and electronic circuitry including a communications transceiver for use with control protocols such as CANBUS and a UART or other means to buffer signals and optionally a microcontroller and is electrically connected in a manner known to those of skill in the art with, for example, an RS485 physical layer with proprietary or open protocol cabin management system within an aircraft. Furthermore, the protocol module 20 may be connected to a device that controls light intensity such as a rheostat switch or an on/off power switch.
During operations, power supplied to the light fixture 24 from the control module 18 is amplified by the power module 16 which receives its power from the power system of a vehicle or other power generator. In an embodiment, for example, the power source may receive power from an aircraft power system. It may also, however, receive power from the power system of a recreational vehicle or a bus.
The control module 18 receives input from the protocol module 20 which is electrically connected to a control system such as an aircraft cabin management system, a rheostat control, or an on/off switch. The protocol module 20 transmits a signal to the control module 18 which in turn adjusts, for example, the intensity of the light source in the light fixture 24, in order to comply with the signal received from the protocol module 20. In some cases the protocol module 20 and control module 18 are combined into one module and perform both functions.
The light source 25 is emitted from the light fixture 24, which is electrically connected to the power module 16 and the control module 18 through the PCB interface 22 can also be turned on and off locally through the use of an on/off switch 26 mounted within the housing 14.
All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety he rein.
The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. It should be understood that the illustrated embodiments are exemplary only, and should not be taken as limiting the scope of the invention.
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| Number | Date | Country | |
|---|---|---|---|
| 20090316437 A1 | Dec 2009 | US |
