GB2489918A

GB2489918A - Dual circuit LED light

Info

Publication number: GB2489918A
Application number: GB1105754.4A
Authority: GB
Inventors: Philip Malcolm Scott
Original assignee: STREETS AHEAD INNOVATIONS UK Ltd
Current assignee: STREETS AHEAD INNOVATIONS UK Ltd
Priority date: 2011-04-05
Filing date: 2011-04-05
Publication date: 2012-10-17
Also published as: GB201105754D0

Abstract

A dual circuit LED light fitting with two separate LED circuits, which are powered independently of each other to provide two distinct levels of illumination. The circuits can be arranged in any desired shape to suit the illumination level and light pattern required. The LEDs may be arranged in a circular or oval pattern with an inner circle 2 forming one circuit and an outer circle 1 forming another circuit. Alternatively the LEDs may be arranged in one or more squares or rectangles or arranged in a random shaped pattern. One circuit can provide background lighting when the other circuit is switched off. The second circuit can provide maximum illumination when both circuits are switched on. The second circuit can be switched on by using a sensor triggered when a pedestrian or vehicle is present. The light fitting saves electricity consumption.

Description

Dual circuit LKD light fitting This invention relates to a dual circuit LED light fitting to provide savings on electricit) consumption.

Currently LED light fittings have a number of LEDs built into them, which are all illuminated at the same time when the light fitting. is switched on. This means that the fittings are normally running attuill power with maximum electricity consumption.

In the UK there are currently some 8 million light fittings used on roads, pathways, footpaths, subways, tunnels and cycle ways, which are often illuminated when there are. no vehicles or people using them.

Currently the only way to save on electricity consumption is to either dim the fitting or switch it off completely. Dimming of bEDs can reduce their effective life and switching off light fittings can. bring other problems such as an increase in crime levels.

To overcome this, the light tilling has two independent LED circuits yhich can be powered separately, comprising a number of individual LEDs thus allowing one circuit to be switched on and the other to be switched off for saving on electricity consumption.

Each circuit can comprise of a number of LEDs to sdtistv the illumination level required in both the background state and in the fully energised state where both circuits are switched on.

The advantage of this is that one circuit can provide background lighting, when the other circuit is switched off The second circuit can provide maximum illumination when both circuits are switched on. The second circuit can he switched on by using a sensor or other method of triggering it, as and when required, for example when a vehicle or pedestrian is present. By operating in this way there are electricity savings compared to the normal operation of an LED light fitting This will save users of the fittings a significant aniount in electricity costs as well as reducing their carbon footprint.

The individual circuits of LEDs can be arranged in a circular pattern, a rectangular pattern, and a square pattern or in any required shape depending on the illumination or lighting pattern required, The fittings could be manufactured with the background (normally on) LED circuit 1 on the inside of the circular pattern with the external circular pattern forming LET) circuit 2 hieli ic normally off The fittings could be. manufactured with the background (nonnally on) LED circuit I as one or more rectangular panels of LED.s in a regular or random pattern with SLED circuit 2 which is. normally off also in. a regular or random pattern.

The fittings could be manufactured with the background (normali.y on) LED circuit I as one or more square panels of LEDs in a regular or random pattern with LED circuit 2 iieh is normally off also in a regular or random pattern.

Fig tire 1 shows a light fitting with a circular pattern of LEDs The outside circle I of LEDs form.s one circuit, which provides background lighting.

The inner array 2 of IEDs forms the second circuit, which is sutehed on when maximum illumination is required. The number of LEDs per circuit can be varied as required.

Figure 2 shows a light fitting with a rectangle pattern ot LEDs forming one circuit 1 and a number of rectangular LED..' patterns forming the second circuit 2., which is switched on when rnaximuni illumination is required. The number of LEDs per circuit can be. varied as required.

Figure 3 shows a light fitting with a square pattern of LEDs forming one circuit I and a number of square LED patterns forming the second circuit 2, v'hich is switched on when maximum illumination is required Thc numbet of LEDs pci circuit can he aried as required

Claims

Claims 1) A dual circuit LED light fitting with two separate LED circuits, \hich are powered independently of each other to provide two distinct level's of illumination.
2) An LED light' fitting according to claim 1, where the LEDs are arranged in a circular pattern with tile Inner circle forming one circuit and. the outer circle forming another circuit.
3) An LED light, fitting according to claim 1, where the LEDs are arranged in a rectangular pattern with one or more rectangles of LEDs forming one circuit and.one or more' rectangles of LEDs forming another circuit.
4) An LED light fining according to claim 1, where the LEDs arc arranged in a s.quarc pattern with one or more squares of LEDs forming one circuit and one or more squares of LED,s forming another circuit.
5) An LED light fitting according to claim 1, where the LEDs are arranged in an oval pattern with the inner oval forming one circuit and. the outer oval forming another circuit.
6) An LED light, fitting according to claim I, where the LEDs are arranged in a random shaped pattern formin.g one circuit and another random shaped pattern forming another circuit,