Solar powered light assembly to produce light of varying colours

Abstract

A garden light ( 10 ) having a body ( 11 ) with a post ( 12 ), the lower end of which is provided with a spike ( 13 ). The upper end of the post ( 12 ) receives a lens assembly ( 14 ). Secured to the lens assembly ( 14 ) is a cap assembly ( 24 ) that has three LEDs that are activated to produce a varying colour light.

1 . A lighting device, said device including:
 a lens;   a circuit comprising:
 at least two light sources of different colors mounted to direct light through at least part of said lens; 
 an activation sub-circuit to provide power to said light sources only at low light levels; 
 a light sub-circuit to independently control delivery of power to each of said at least two light sources so as to ramp up and ramp down intensity of light emitted over time by said at least two light sources to produce a color changing cycle of more than two colors; 
 connections for at least one rechargeable battery to power said circuit; and 
   at least one solar cell mounted so as to be exposed to light and operatively associated with said connections to charge said battery.   
   
   
       2 . The lighting device of  claim 1 , further comprising a spike for positioning said connections above a ground surface. 
   
   
       3 . The lighting device of  claim 1 , wherein said light sub-circuit further independently controls delivery of power to each of said lamps so as to vary frequency of changes to said intensity. 
   
   
       4 . The lighting device of  claim 1 , wherein said lens is a first lens generally forming a chamber and further comprising a second lens generally forming a cavity and wherein said at least two light sources are mounted to direct light into said chamber via said cavity such that said light produced by said at least two light sources is at least partially diffused by said second lens and then said first lens. 
   
   
       5 . The lighting device of  claim 4 , wherein said second lens projects at least partially into said chamber. 
   
   
       6 . The lighting device of  claim 4 , further including a lens assembly comprises a base, said first lens and said second lens, and wherein said second lens is attached to said base, and wherein said base is removably attached to said first lens. 
   
   
       7 . The lighting device of  claim 6 , wherein said circuit is at least partially contained in said base. 
   
   
       8 . The lighting device of  claim 1 , further comprising at least one user-operated switch operable to control said circuit, with said switch being accessible by said user thereby enabling said user to manipulate said switch to control delivery of power to said at least two light sources. 
   
   
       9 . The lighting device of  claim 8 , further comprising a sealed chamber generally formed by said lens and wherein said switch is located outside said chamber. 
   
   
       10 . The lighting device of  claim 8 , wherein said light sub-circuit delivers electric power so that said at least two light sources produce a constant color, with said switch being a first switch, and said circuit includes a second switch, said second switch being an on/off switch to deliver electric power from said at least one rechargeable battery to said sub-circuit. 
   
   
       11 . The lighting device of  claim 10 , wherein said first switch is accessible via an exposed external surface. 
   
   
       12 . The lighting device of  claim 8 , wherein said switch is a first switch, and said circuit includes a second switch, said second switch being an on/off switch to deliver electric power from said at least one rechargeable battery to said sub-circuit, and wherein said sub-circuit further comprises an integrated circuit wherein said first switch is connected to said integrated circuit, said first switch being operable to select a constant color. 
   
   
       13 . The lighting device of  claim 8 , further comprising:
 a base;   a battery compartment attached to said base to receive said at least one battery; and   wherein said switch is exposed to said battery compartment to provide for operation thereof by said user, and said lens is attached to said battery compartment, with said lens and compartment being removably attached to said base to provide access to said compartment by said user and therefore to said switch.   
   
   
       14 . The lighting device of  claim 13 , wherein said lens and said battery compartment are removably attached to said base by relative rotation therebetween. 
   
   
       14 . The lighting device of  claim 13 , wherein said battery compartment and said lens are threadably attached to said base with relative rotation therebetween providing for removal and attachment of said lens and compartment with respect to said base. 
   
   
       15 . The device of  claim 8  further comprising a body upon which said circuit is mounted, said body providing a closable battery compartment to receive said at least one battery, and wherein said switch is mounted on said body so as to be exposed to said compartment so that a user has access thereto by opening said compartment. 
   
   
       17 . The lighting device of  claim 8 , wherein said light sub-circuit varies said power to each of said at least two light sources so as to vary both the intensity of said light emitted by each of said at least two light sources and the frequency of changes to said intensity to produce a continuously color changing cycle. 
   
   
       18 . The lighting device of  claim 1 , wherein any one of said at least two light sources is a single diode that emits light when energized, and wherein said at least two lamps comprise at least a diode that emits red light and a diode that emits blue light. 
   
   
       19 . The lighting device of  claim 1 , further comprising:
 a chamber generally formed by said lens;   an at least partially hollow base, wherein said base is removably secured to said lens and said circuit is at least partially contained in said base; and   
     wherein said at least two light sources are mounted to direct light into said chamber such that said light produced by said at least two light sources is at least partially diffused by said lens. 
   
   
       20 . The lighting device of  claim 1 , wherein said at least two light sources are at least three light sources and said more than two colors are more than three colors. 
   
   
       21 . The lighting device of  claim 8 , wherein said light sub-circuit delivers electric power so that said at least two light sources produce a desired fixed color, with said switch being a first switch, and said circuit includes a second switch, said second switch being an on/off switch to deliver electric power from said at least one rechargeable battery to said sub-circuit. 
   
   
       22 . The lighting device of  claim 8 , wherein said switch is disposable in a first configuration wherein at least one of said at least two light sources produce a constant color, and a second configuration wherein said at least two light sources produce varying colors. 
   
   
       23 . The lighting device of  claim 8 , wherein said switch is accessible via an exposed external surface. 
   
   
       24 . The lighting device of  claim 2 , further comprising:
 a body wherein said lens is mounted on said body and wherein said lens generally encloses a chamber having an upper rim surrounding a top opening, and a bottom region;   a cap assembly including securing means to releasably engage said rim so that the cap assembly can be selectively removed from the lens; said cap assembly including said connections and said at least one solar cell; and   at least one user-operated switch operable to control said circuit, with said switch being accessible by said user thereby enabling said user to manipulate said switch to control delivery of power to said at least two light sources   
   
   
       25 . The lighting device of  claim 24 , wherein said body includes a post for positioning said lens above a ground surface. 
   
   
       26 . The lighting device of  claim 2 , further comprising a post for positioning said lens above a ground surface. 
   
   
       27 . The lighting device of  claim 8 , wherein said at least two lamps further comprise at least a diode that emits green light and wherein said at least two light sources are connected in series to an integrated circuit such that the frequency of changes in color and the intensity level of color produced by said at least two light sources is set in a predetermined configuration. 
   
   
       28 . The lighting device of  claim 1 , wherein said, wherein any one of said at least two light sources is a single diode that emits light when energized, and wherein said at least two lamps comprise at least a diode that emits a first colored light, a diode that emits a second colored light and a diode that emits a third colored light and wherein said at least two light sources are connected in series to an integrated circuit such that said sub-circuit produces at least a fourth colored light. 
   
   
       29 . The lighting device of  claim 1 , further comprising an assembly, wherein said assembly includes:
 a base;   a cover fixed to said base;   at least one battery compartment disposed within said base, wherein said battery is disposed within said battery compartment during use;   said connections proximate to said battery;   said at least one solar cell mounted on a surface of said base; and   
     wherein said assembly is connected to said lens and positioned a predetermined distance above said lens in a generally vertical longitudinal axis and wherein said cover shields at least part of said lens from above. 
   
   
       30 . The lighting device of  claim 1 , further comprising a post for elevating said lens above a ground surface. 
   
   
       31 . The lighting device of  claim 1 , wherein said color changing cycle includes a spectrum of colors including at least a first color, a second color, and a third color and wherein said at least two light sources includes a first light source having said first color and a second light source having said second color, and wherein said color changing cycle includes a third color produced by said first light source and said second light source. 
   
   
       32 . The lighting device of  claim 31 , further comprising a spike for positioning said connections above a ground surface. 
   
   
       33 . The lighting device of  claim 31 , further comprising a post for positioning said lens above a ground surface. 
   
   
       34 . The lighting device of  claim 31 , further comprising at least one user-operated switch operable to control said circuit, with said switch being accessible by said user thereby enabling said user to manipulate said switch to control delivery of power to said at least two light sources. 
   
   
       35 . A lighting device, said device comprising:
 a lens;   a circuit comprising:
 at least two light sources of different colors mounted to direct light through at least part of said lens, 
 an activation sub-circuit to provide power to said light sources only at low light levels, 
 a light sub-circuit to control delivery of power to each of said at least two light sources so as to vary the color of light emitted by said lens, wherein said light sub-circuit has at least one integrated circuit for independently controlling said light sources, 
 a selection switch connected to said at least one integrated circuit and operable to select a desired fixed color of light emitted via said lens, 
 a volatile memory retained for a period of time and associated with said at least one integrated circuit, said memory causing operation of said circuit to produce said desired fixed color of light, 
 connections for at least one rechargeable battery to power said circuit; and 
   at least one solar cell mounted so as to be exposed to light and operatively associated with said connections to charge said battery.   
   
   
       36 . The lighting device of  claim 35 , wherein said memory is a switch. 
   
   
       37 . The lighting device of  claim 35 , wherein said memory forms a portion of said at least one integrated circuit. 
   
   
       38 . The lighting device of  claim 35 , wherein said light sub-circuit is connected to said light sources to deliver electric power thereto, so that the light sources produce said desired color. 
   
   
       39 . The lighting device of  claim 35 , further comprising an on/off switch operable to control delivery of electric power from said battery to the sub-circuit. 
   
   
       40 . The lighting device of  claim 35 , further comprising: a voltage cut-off sub-circuit, wherein said cut-off sub-circuit interrupts delivery of power to said light sources, upon a voltage in said cut-off sub-circuit reaching a predetermined threshold. 
   
   
       41 . The lighting device of  claim 40 , wherein said voltage cut-off sub-circuit forms a portion of said integrated circuit. 
   
   
       42 . The lighting device of  claim 40 , wherein said circuit further comprises: a capacitor, wherein said capacitor is arranged to store charge when an output voltage of said battery is greater than a stored charge on said capacitor and to discharge charge when said output voltage of said battery is lower than said stored charge. 
   
   
       43 . The lighting device of  claim 42 , wherein said voltage cut-off sub-circuit prevents said capacitor from discharging further stored charge, upon a voltage in said cut-off sub-circuit reaching a predetermined threshold, such that a retained stored charge on said capacitor provides sufficient voltage to said memory to retain the selected desired color for a period of time. 
   
   
       44 . The lighting device of  claim 43 , wherein said retained stored charge is substantially zero volts. 
   
   
       45 . A lighting device, said device comprising:
 A lens;   A circuit comprising:
 at least two light sources of different colors mounted to direct light through at least part of said lens, 
 an activation sub-circuit to provide power to said at least two light sources only at low light levels, 
 a light sub-circuit to control delivery of power to each of said at least two light sources so as to vary light emitted by said lens, wherein said light sub-circuit has at least one integrated circuit for independently controlling said light sources, 
 a selection switch, said selection switch being connected to said at least one integrated circuit and operable to select a desired lighting effect, and 
 a volatile memory retained for a period of time and associated with said at least one integrated circuit, said memory causing operation of said circuit to produce said lighting effects; and 
   connections for at least one rechargeable battery to power said circuit.   
   
   
       46 . The lighting device of  claim 45 , wherein said lighting effect is selected from a group of lighting effects consisting of: a specific color changing effect, a color brightness effect, a color changing frequency effect, a color changing sequence effect, and a color light intensity effect.