GB2474525A

GB2474525A - LED light

Info

Publication number: GB2474525A
Application number: GB0919736A
Authority: GB
Inventors: Mark Crabtree
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-09
Filing date: 2009-11-11
Publication date: 2011-04-20
Also published as: GB0919736D0; GB0917703D0

Abstract

A lamp has a reflector (1, fig 1) into which is mounted a LED arrangement. LEDs are mounted onto a circuit board 6, with a heat sink 5. Directional light legs 4 are then placed over the circuit board 6 which act to reflect light outwards from the LEDs. A diffuser 3 is placed over the LED arrangement. The LEDs are arranged so that they point radially outwards of the lamp.

Description

FIELD OF THE INVENTION: the present invention relates to a system and method to reflect and regenerate light from light-emitting diodes, therefore providing energy efficient light in line with levels required for retail and commercial usage.

BACKGROUND OFTHE INVENTION: Over recent years, concerns over energy production have become ever more relevant as stocks of fossil fuels are depleting worldwide. Production of electricity is central to these concerns & various ways in which electricity is used have been investigated. In addition to the environmental concerns, the increasing costs of producing electricity have been born by the end user.

Ways in which the electricity already produced is used and conserved is at the forefront of current consumer thinking with a view to reduce energy costs. To this end there have been various low energy lighting solutions introduced to market place, all with varying degrees of success. However the investment vs. payback for the end user when taking into consideration ongoing utility costs and ongoing replacement capital expenditure costs is somewhat questionable. With this in mind, a need for a device to credibly/affordably reduce this type of energy consumption exists.

SUMMARY OF INVENTION: Although there are many ways available in the current market place to purchase classified energy saving lighting systems, the cost vs. saving can in some cases be difficult to justify. Furthermore, with existing lighting solutions the available light degrades overtime, and there are repetitive ongoing maintenance costs for replacement units.

The present invention proposes to use light-emitting diodes, however although light-emitting diodes are a natural solution for low energy lighting, they are by construction a directional light, therefore have limited use in commercial environments.

To overcome this, the present invention proposes to place a number of light-emitting diodes around a circular heat sink. The light from the front, left and right of each light-emitting diode is then directed onto an arched white reflective surface, with the normally wasted light from the base of the light-emitting diodes also being directed through a frosted or sandblasted panel on the base of the whole unit. Thus using the normally wasted light, but also protecting the end user from the sometimes damaging glare of light-emitting diodes. This total collective light then comes together in such a manner that it creates a singular formed light, creating an ambient lighting solution in line with the required purpose, similar to that generated directly or indirectly by a standard or energy saving light bulb or florescent tube, wherein the light-emitting diodes are arranged so that their axes of illumination diverge so as to increase the breadth of the illumination of the reflector. With huge energy consumption savings, and substantially reduced ongoing maintenance costs.

In regards to power consumption, the present invention can be powered either direct from mains supply, a l2vbattery operation, or direct solar power without the need for a battery interface. This includes the power requirements for short circuit protection & current limiting resistors.

Below is a description of the invention, making reference to the accompanying drawings.

Figure 1 shows the constructed reflector to which the lighting unit is mounted.

Figure 2 shows the constructed lighting unit, which includes the light-emitting diodes on a flexible printed circuit board, heat sink, directional light legs and protective glass panel.

In figure 1, the main reflector unit consisting of smooth arced edges or directional light reflectors (1), and a fixing point (2), for the constructed light-emitting diodes unit itself. The square panel of the heat sink fits into the fixing point of the reflector.

Figure 2 shows the lighting units, the light-emitting diodes which are constructed onto a flexible printed circuit board (6), are wrapped around the heat sinks (5) upright mounting unit. The directional light legs (4) are then fixed over the circuit board in-between each light-emitting diode, these then not only act as a reflector for the side light omitted from the light-emitting diode, they also act as fixing points. The sandblasted/frosted glass panel (3) is then placed over the top of the whole unit, and fixed into the reflector.

The invention is capable of other embodiments and it is to be understood that the phraseology terminology employed herein are for the purpose of description and should not be regarded as limiting.

As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as the basis for the designing of other structures for carrying out the purpose of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. To the accomplishment of the above and related objects, the invention may be embodied in the form illustrated in the accompanying drawing. Attention is called to the fact, however, that the drawings are illustrative only. Variations are contemplated as being part of the invention, limited only by the scope of the claims.

Claims

Claims 1. A method of arranging light-emitting diodes towards a white based reflective unit, in such a manner that this provides ambient light to create a fully formed light in line with the current market alternatives of florescent, halogen and other ceiling mounted lighting units, at substantially reduced energy consumption.
2. A method of producing further light in addition to claim 1, by placing a sandblasted/frosted glass or plastic cover over the non-directional light or wasted light, thus producing a singular formed light coverage.
3. A lighting unit as claimed in any proceeding claim, wherein the light-emitting diodes are arranged so that their axes of illumination diverge so as to increase the breadth of the illumination of the reflector.
4. A LED lighting unit capable of being powered directly by a 12-volt supply source i.e. such as Solar Power, therefore no loss/wastage of generated power due to conversion from alternating current.
5. A lighting unit substantially and hereinbefore described with reference to, and shown in, the accompanying drawings
6. A lighting unit as claimed in 1, wherein the axis of illumination of each row of light-emitting diodes is angled towards with respect to the axis of the white reflector, providing a substantially fuller lighting surface.
7. A lighting unit as claimed in any proceeding claim, and including a thermal overload protection, or heat sink.
8. A lighting unit as claimed in any proceeding claim, and including a short circuit protection.
9. A lighting unit as claimed in any proceeding claim, and including one or more current limiting resistors.