CA2478001A1 - Led light bulb - Google Patents
Led light bulb Download PDFInfo
- Publication number
- CA2478001A1 CA2478001A1 CA002478001A CA2478001A CA2478001A1 CA 2478001 A1 CA2478001 A1 CA 2478001A1 CA 002478001 A CA002478001 A CA 002478001A CA 2478001 A CA2478001 A CA 2478001A CA 2478001 A1 CA2478001 A1 CA 2478001A1
- Authority
- CA
- Canada
- Prior art keywords
- light
- led
- power
- bulb
- array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000006185 dispersion Substances 0.000 abstract description 3
- 241000270295 Serpentes Species 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- NJNQFHVIXUJHSN-FBHNOXKOSA-N (8ξ,12ξ)-8,12-dihydroxy-4-methyl-11,16-dioxo-13,19-didehydro-15,20-dihydrosenecionan-4-ium Chemical compound O1C(=O)C(CC)CC(=C)C(C)(O)C(=O)OCC2=CC[N+]3(C)C2(O)[C@H]1CC3 NJNQFHVIXUJHSN-FBHNOXKOSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- HISUXXSSPPIDKV-UHFFFAOYSA-N emiline Natural products CCC1CC(=C)C(C)(O)C(=O)OCC2=CCN(C)CCC(OC1=O)C2=O HISUXXSSPPIDKV-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
- F21V29/673—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for intake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/60—Light sources with three-dimensionally disposed light-generating elements on stacked substrates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The present invention is directed to an LED light bulb comprising an interface connecting the bulb to a standard light fixture, a power control section for supplying and controlling power to an LED array, an electro thermal core for interconnection of a high density array of LEDs providing electrical interconnection and thermal collection for dispersion of the heat and an LED array producing a white light of a suitable intensity and color.
Description
TITLE: LED LIGHT BULB
FIELD OF THE INVENTION
The present invention relates to an LED light bulb used to replace existing lighting, especially residential incandescent light bulbs.
BACKGROUND OF THE INVENTION
The most common lighting sources used in residential lighting are incandescent light bulbs that produce light using a wire filament which is heated up by the electrical current running through the filament contained within a vacuum which may also contain a mercury vapor or halogen atmosphere. Many problems exist with these light bulbs in that such bulbs fail frequently, produce large amounts of heat and use significant amounts of electricity to produce light.
These disadvantages result in high maintenance costs, rises in room temperature and unnecessary energy consumption.
There have been attempts to improve the efficiency of such light bulbs such as, for example, the use of lower power fluorescent light bulbs which can be utilized in a standard incandescent light bulb screw base fixture.
While such bulbs do use less power, the problem of the mercury vapor atmosphere within the bulb is still present which can create environmental problems on disposal.
There have also been attempts to replace incandescent light bulbs with LED light bulbs such as shown-for example in US Patent 6,609,804. However, such LED light bulbs do not easily replace incandescent light sources nor are they significantly more energy efficient for the same light output.
There still remains a need for a light source for residential lighting which can easily replace standard incandescent light bulbs, but use less power, run cooler and have a longer life span.
SUMMARY OF THE INVENTION
The present invention is directed to an LED light bulb comprising an interface connecting the bulb to a standard light fixture, a power control section for supplying and controlling power to an LED array, an electro thermal core for interconnection of a high density array of LEDs providing electrical interconnection and thermal collection for dispersion of the heat and an LED array producing a white light of a suitable intensity and color.
The present invention is also directed to a novel LED array using an electro thermal core for interconnection of a high density array of LEDs providing electrical interconnection and thermal collection for dispersion of the heat and an LED array producing a white light of a suitable intensity and color.
The present invention is also directed to a novel a power control section for supplying and controlling power to an LED array comprising a non-switching linear design based on a monolithic approach of power control, whereby, the load (the LED array) becomes part of the power control system.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention are shown in the drawings,_wherein:
Figure 1 is a perspective view of an embodiment of an LED light bulb according to the present invention;
Figure 2 is a perspective view of the bottom of the light bulb of Figure 1;
Figure 3 is a side elevation view in cross-section of the LED bulb of Figure 1;
FIELD OF THE INVENTION
The present invention relates to an LED light bulb used to replace existing lighting, especially residential incandescent light bulbs.
BACKGROUND OF THE INVENTION
The most common lighting sources used in residential lighting are incandescent light bulbs that produce light using a wire filament which is heated up by the electrical current running through the filament contained within a vacuum which may also contain a mercury vapor or halogen atmosphere. Many problems exist with these light bulbs in that such bulbs fail frequently, produce large amounts of heat and use significant amounts of electricity to produce light.
These disadvantages result in high maintenance costs, rises in room temperature and unnecessary energy consumption.
There have been attempts to improve the efficiency of such light bulbs such as, for example, the use of lower power fluorescent light bulbs which can be utilized in a standard incandescent light bulb screw base fixture.
While such bulbs do use less power, the problem of the mercury vapor atmosphere within the bulb is still present which can create environmental problems on disposal.
There have also been attempts to replace incandescent light bulbs with LED light bulbs such as shown-for example in US Patent 6,609,804. However, such LED light bulbs do not easily replace incandescent light sources nor are they significantly more energy efficient for the same light output.
There still remains a need for a light source for residential lighting which can easily replace standard incandescent light bulbs, but use less power, run cooler and have a longer life span.
SUMMARY OF THE INVENTION
The present invention is directed to an LED light bulb comprising an interface connecting the bulb to a standard light fixture, a power control section for supplying and controlling power to an LED array, an electro thermal core for interconnection of a high density array of LEDs providing electrical interconnection and thermal collection for dispersion of the heat and an LED array producing a white light of a suitable intensity and color.
The present invention is also directed to a novel LED array using an electro thermal core for interconnection of a high density array of LEDs providing electrical interconnection and thermal collection for dispersion of the heat and an LED array producing a white light of a suitable intensity and color.
The present invention is also directed to a novel a power control section for supplying and controlling power to an LED array comprising a non-switching linear design based on a monolithic approach of power control, whereby, the load (the LED array) becomes part of the power control system.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention are shown in the drawings,_wherein:
Figure 1 is a perspective view of an embodiment of an LED light bulb according to the present invention;
Figure 2 is a perspective view of the bottom of the light bulb of Figure 1;
Figure 3 is a side elevation view in cross-section of the LED bulb of Figure 1;
- 2 -Figure 4 is an exploded perspective view of the electro thermal core of the LED bulb of Figure 1;
Figure 5 is a top plan view of the electro thermal core of the LED bulb of Figure 1;
Figure 6 is a circuit diagram of the LED bulb of Figure 1;
Figure 7 is a perspective view of an embodiment of the LED light bulb in a ceiling panel fixture; and Figure 8 is a side elevation view partly in cross section of an embodiment of an LED light bulb of the present invention in a street lamp fixture.
DETAILED DESCRIPTION OF THF~ PREFERRED EMBODIMENTS
The LED light bulb of the present invention is comprised of four major blocks - an interface, a power/control section, an electro-thermal core and an LED
Array/Optics. The interface connects the LED light bulb to an electrical power source. Preferably, the interface allows the LED light bulb to be used in existing fixtures as described below. The power/control section is responsible for supplying and controlling power to the LED bulb array and ensures optimum light output under a wide range of ambient temperatures, as well as maximizing the life of the individual LEDs. The electro/thermal core section makes possible the interconnection of a very high density array of LEDs. The LED array/optics provides the desired luminous spectrum and distribution of the light from the LEDs. The structure and operation of the LED light bulb of the present invention will now be described with respect to various preferred embodiments. _ A first embodiment of the LED light bulb of the present invention for use as a replacement for residential incadescent light bulbs is illustrated in figures 1 to 5 generally indicated by the numeral 10.
The LED light bulb 10 is provided with a screw base interface 12 which fits into the standard screw base
Figure 5 is a top plan view of the electro thermal core of the LED bulb of Figure 1;
Figure 6 is a circuit diagram of the LED bulb of Figure 1;
Figure 7 is a perspective view of an embodiment of the LED light bulb in a ceiling panel fixture; and Figure 8 is a side elevation view partly in cross section of an embodiment of an LED light bulb of the present invention in a street lamp fixture.
DETAILED DESCRIPTION OF THF~ PREFERRED EMBODIMENTS
The LED light bulb of the present invention is comprised of four major blocks - an interface, a power/control section, an electro-thermal core and an LED
Array/Optics. The interface connects the LED light bulb to an electrical power source. Preferably, the interface allows the LED light bulb to be used in existing fixtures as described below. The power/control section is responsible for supplying and controlling power to the LED bulb array and ensures optimum light output under a wide range of ambient temperatures, as well as maximizing the life of the individual LEDs. The electro/thermal core section makes possible the interconnection of a very high density array of LEDs. The LED array/optics provides the desired luminous spectrum and distribution of the light from the LEDs. The structure and operation of the LED light bulb of the present invention will now be described with respect to various preferred embodiments. _ A first embodiment of the LED light bulb of the present invention for use as a replacement for residential incadescent light bulbs is illustrated in figures 1 to 5 generally indicated by the numeral 10.
The LED light bulb 10 is provided with a screw base interface 12 which fits into the standard screw base
- 3 -fixtures. The screw base 12 is affixed to a thermal cap 14 containing openings 16 to allow for air flow through the bulb 10 as will be described later.
The screw base 12 also houses the power/control electronics used for powering the LED bulb array. The screw base 12 is a flanged form with a cavity space 18 that accommodates the power/control circuitry 20. An acrylic frosted diffused lens 22 covers the LED bulb array 24 and is attached to the thermal cap 14.
The electro/thermal core section 24 makes possible the interconnection of a very high density array of LEDs 26.
The core 24 provides electrical interconnection, thermal collection and physical support for the LEDs 26. The heat generated in the array is dispersed by a controlled convection air flow through the thermal cap 14.
As illustrated in Figures 3 to 5, the Electro-Thermal Core 24 is a segmented structure which consists of a series of disks stacked so as to form a core. There are 3 disk types: circuit disks 28, metal disks 30, and insulator disks 32. All disks types are designed to have a high thermal conductance. The disks are secured by means of a retaining rod 34 that is threaded through the center of the disk stack.
The surfaces of the disks are machined and mated so as to reduce thermal resistances between them for maximum heat transfer.
The circuit disks 28 have twelve 30 degree segments 36; one segment 38 is split and serves as the circuit interconnection point. This allows each circuit disk 28 to have twelve LED bulbs 26 connected in series. Four circuit disks 28 are connected in series to provide an LED cluster of 48 LED bulbs. To increase light output, a number of LED
clusters are connected in parallel. Typically 2 to 6 such clusters are connected in parallel. To improve light
The screw base 12 also houses the power/control electronics used for powering the LED bulb array. The screw base 12 is a flanged form with a cavity space 18 that accommodates the power/control circuitry 20. An acrylic frosted diffused lens 22 covers the LED bulb array 24 and is attached to the thermal cap 14.
The electro/thermal core section 24 makes possible the interconnection of a very high density array of LEDs 26.
The core 24 provides electrical interconnection, thermal collection and physical support for the LEDs 26. The heat generated in the array is dispersed by a controlled convection air flow through the thermal cap 14.
As illustrated in Figures 3 to 5, the Electro-Thermal Core 24 is a segmented structure which consists of a series of disks stacked so as to form a core. There are 3 disk types: circuit disks 28, metal disks 30, and insulator disks 32. All disks types are designed to have a high thermal conductance. The disks are secured by means of a retaining rod 34 that is threaded through the center of the disk stack.
The surfaces of the disks are machined and mated so as to reduce thermal resistances between them for maximum heat transfer.
The circuit disks 28 have twelve 30 degree segments 36; one segment 38 is split and serves as the circuit interconnection point. This allows each circuit disk 28 to have twelve LED bulbs 26 connected in series. Four circuit disks 28 are connected in series to provide an LED cluster of 48 LED bulbs. To increase light output, a number of LED
clusters are connected in parallel. Typically 2 to 6 such clusters are connected in parallel. To improve light
- 4 -diffusion, the LED clusters are interleaved and not stacked one above the other. Metal disks 30 and insulating disks 32 are placed appropriately in the stack and thermal compound is used on all mating surfaces. The stack is threaded together by a insulated retaining rod 34 and attached to the thermal cap 14. The cap 14 serves several functions and is one of the key design elements.
The constructed core is then thermally and mechanically secured to the thermal cap thereby completing the thermal circuit.
The luminous spectrum and distribution of the light from the LED array is a product of the LED type and Optic Path. Preferably two types of 5mm LEDs are utilized to produce a white light with a CRI of 85+.
The core is covered and contained by a frosted diffuser which has two primary functions of light distribution and air flow control. The light from the individual LEDs is collated and scattered using a frosted diffuser lenses thereby evenly distributing the light in all directions. The cavity of the frosted diffuser lenses, when attached to the thermal cap, creates a venturi. Cool air enters the inlet and passes over an impeller which creates a consistent uniform turbulence which in turn, increases the rate of air flow through the venturi, thereby reducing the core temperature. Hot air is then ported through the venturi outlet completing the air flow path.
The power_/control section 20 is responsible for supplying and controlling power to the LED bulb array 24 and ensures optimum light output under a wide range of ambient temperatures, as well as maximizing the life of the LEDs 26.
As illustrated in Figure 6, the power/control section 20 provides rectification and filtering through a Linear DC
supply having Linear Current Regulation and Optical Choke.
The constructed core is then thermally and mechanically secured to the thermal cap thereby completing the thermal circuit.
The luminous spectrum and distribution of the light from the LED array is a product of the LED type and Optic Path. Preferably two types of 5mm LEDs are utilized to produce a white light with a CRI of 85+.
The core is covered and contained by a frosted diffuser which has two primary functions of light distribution and air flow control. The light from the individual LEDs is collated and scattered using a frosted diffuser lenses thereby evenly distributing the light in all directions. The cavity of the frosted diffuser lenses, when attached to the thermal cap, creates a venturi. Cool air enters the inlet and passes over an impeller which creates a consistent uniform turbulence which in turn, increases the rate of air flow through the venturi, thereby reducing the core temperature. Hot air is then ported through the venturi outlet completing the air flow path.
The power_/control section 20 is responsible for supplying and controlling power to the LED bulb array 24 and ensures optimum light output under a wide range of ambient temperatures, as well as maximizing the life of the LEDs 26.
As illustrated in Figure 6, the power/control section 20 provides rectification and filtering through a Linear DC
supply having Linear Current Regulation and Optical Choke.
- 5 -.~,~"g;~: _- , CA 02478001 2004-08-18 The power/control section 20 utilizes a unique technology called an "optical ballast".
Conventional LED power controllers are based on various switching circuits that are placed in series with the LED bulb array. The switching rate and duration controls the effective power, and therefore, the heat generated. Some drawbacks to these prior arrangements include RFI/EMI- line contamination causing interference with other electronic devices, circuit complexity with high part count, additional heat generated by controller circuit which reduces efficiency and circuit life, and strobe effects.
The Optical Ballast Technology eliminates the above drawbacks by utilizing a non-switching linear design based on a monolithic approach of power control, whereby, the load (the array) becomes part of the power control system.
The external portion of the controller is a Very Low Voltage (VLV) design and consumes only 2$ of the total energy required by the array. The rest of the power required for the array is trapped in the array and the LEDs are forced to work with a fixed range of power. Since the power range is fixed, the LEDs dynamic resistance becomes the power controller, and not the external controller. Thus the power required for the array includes the power required to control the array and all the power is used to produce light. By controlling the the array in this way the array is almost 100$ efficient since all the power is producing light and any heat produced is the result of producing light, and not generated in the controlling circuit. The result is that the power required to control the array is a portion of the total light_output, hence the name "Optic Ballast".
It has been found that a prototype repalcement for an incadescent bulb as illustratede in Figures 1 to 6 containing 4 LED clusters or 192 LEDs produces the equivalent light as a 60 watt incandescent bulb while consuming about 20 watts or 1/3 the power of an 60 Watt incandescent bulb resulting in
Conventional LED power controllers are based on various switching circuits that are placed in series with the LED bulb array. The switching rate and duration controls the effective power, and therefore, the heat generated. Some drawbacks to these prior arrangements include RFI/EMI- line contamination causing interference with other electronic devices, circuit complexity with high part count, additional heat generated by controller circuit which reduces efficiency and circuit life, and strobe effects.
The Optical Ballast Technology eliminates the above drawbacks by utilizing a non-switching linear design based on a monolithic approach of power control, whereby, the load (the array) becomes part of the power control system.
The external portion of the controller is a Very Low Voltage (VLV) design and consumes only 2$ of the total energy required by the array. The rest of the power required for the array is trapped in the array and the LEDs are forced to work with a fixed range of power. Since the power range is fixed, the LEDs dynamic resistance becomes the power controller, and not the external controller. Thus the power required for the array includes the power required to control the array and all the power is used to produce light. By controlling the the array in this way the array is almost 100$ efficient since all the power is producing light and any heat produced is the result of producing light, and not generated in the controlling circuit. The result is that the power required to control the array is a portion of the total light_output, hence the name "Optic Ballast".
It has been found that a prototype repalcement for an incadescent bulb as illustratede in Figures 1 to 6 containing 4 LED clusters or 192 LEDs produces the equivalent light as a 60 watt incandescent bulb while consuming about 20 watts or 1/3 the power of an 60 Watt incandescent bulb resulting in
- 6 -about 66~ Power Savings. The operating temperature of the bulb was 125 deg. F., 35 deg. lower than a 60 watt bulb. The expected life expectancy of the LED bulb is 20+ Years in continuous use.
In the first preferred embodiment, as described above, the LED light bulb 10 is designed to replace an existing 120 volt incandescent light bulb and. By changing the interface, the bulb may be used in other types of fixtures as well as for other applications.
For example, the LED light bulb of the present invention as described above, may also be used to replace other types of light sources, such as fluorescent lights. An in lay panel, similar to existing fluorescent fixtures may be provided with a number of receptacles for a screw base.
Generally anywhere from 4 to 8 such receptacles are provided depending upon the desired light output. The receptacles are wired to a junction box for connection to the electrical wires from the supply.
Alternatively, as illustrated in Figure 7, a replacement lay in panel 50 may be provided to replace exisitng fluorescent lay in panels. The panel 50 is provided with a recess 52 containing the LED light bulbs 54. The interface is a junction box 56 which allows direct connection to the wiring in a onventional manner. The power/control circuity may be contained within the junction box 56 and the output wires 58 of the power/control section lead to connectors for the LED arrays. A frosted diffuser panel 60 is provided to collate and scatter the light from the LED
arrays- thereby evenly distributing the light in all directions.
A further embodiment of an LED light bulb 68 of the present invention is illustrated in Figure 8 for use as a street light in a typical cobra head street light head 70.
The light bulb 68 is provided with a screw base interface 72 _ 7 _ which allows it to be connected to the light head 70.
Similar to the first embodiment, the power/control section 74 is contained within the screw base 72. The electro/thermal core and LED array are mounted in the top of the cobra head and connected to the power/control section 74 in the screw base 72 by wires 75. The electro/thermal core 76 contains the high density of LEDs 78 arranged similar to the first embodiment. The LEDs 78 are arranged in 8 clusters of 48 LEDs in each cluster. The core is constructed similar to the first embodiment with circuit disks, metal disks and insulator disks. As the cobra head 70 is provided with a diffuser cover 80, a separate difusser for the LED light bulb 68 is not required.
Although various preferred embodiments of the present invention have been described in detail, it will be appreciated by those skilled in the art that variations may be made thereto without departing from the spirit of the invention.
_ g _
In the first preferred embodiment, as described above, the LED light bulb 10 is designed to replace an existing 120 volt incandescent light bulb and. By changing the interface, the bulb may be used in other types of fixtures as well as for other applications.
For example, the LED light bulb of the present invention as described above, may also be used to replace other types of light sources, such as fluorescent lights. An in lay panel, similar to existing fluorescent fixtures may be provided with a number of receptacles for a screw base.
Generally anywhere from 4 to 8 such receptacles are provided depending upon the desired light output. The receptacles are wired to a junction box for connection to the electrical wires from the supply.
Alternatively, as illustrated in Figure 7, a replacement lay in panel 50 may be provided to replace exisitng fluorescent lay in panels. The panel 50 is provided with a recess 52 containing the LED light bulbs 54. The interface is a junction box 56 which allows direct connection to the wiring in a onventional manner. The power/control circuity may be contained within the junction box 56 and the output wires 58 of the power/control section lead to connectors for the LED arrays. A frosted diffuser panel 60 is provided to collate and scatter the light from the LED
arrays- thereby evenly distributing the light in all directions.
A further embodiment of an LED light bulb 68 of the present invention is illustrated in Figure 8 for use as a street light in a typical cobra head street light head 70.
The light bulb 68 is provided with a screw base interface 72 _ 7 _ which allows it to be connected to the light head 70.
Similar to the first embodiment, the power/control section 74 is contained within the screw base 72. The electro/thermal core and LED array are mounted in the top of the cobra head and connected to the power/control section 74 in the screw base 72 by wires 75. The electro/thermal core 76 contains the high density of LEDs 78 arranged similar to the first embodiment. The LEDs 78 are arranged in 8 clusters of 48 LEDs in each cluster. The core is constructed similar to the first embodiment with circuit disks, metal disks and insulator disks. As the cobra head 70 is provided with a diffuser cover 80, a separate difusser for the LED light bulb 68 is not required.
Although various preferred embodiments of the present invention have been described in detail, it will be appreciated by those skilled in the art that variations may be made thereto without departing from the spirit of the invention.
_ g _
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An LED light fixture comprising an interface for connecting the fixture to a source of electrical power, a power control section for supplying and controlling power to an LED array producing a light of a suitable intensity and color for the task for what the fixture is to be used and a light diffuser for diffusing the light from the LED
array.
array.
2. A power control for supplying and controlling power to an LED array comprising a non-switching linear design based on a monolithic approach of power control whereby the load (the LED array) becomes part of the power control system.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002478001A CA2478001A1 (en) | 2004-08-18 | 2004-08-18 | Led light bulb |
| JP2007526149A JP4989472B2 (en) | 2004-08-18 | 2005-08-18 | LED control using dynamic resistance of LED |
| PCT/CA2005/001255 WO2006017930A1 (en) | 2004-08-18 | 2005-08-18 | Led control utilizing dynamic resistance of leds |
| AU2005274629A AU2005274629B2 (en) | 2004-08-18 | 2005-08-18 | LED control utilizing dynamic resistance of LEDs |
| EP05774835A EP1785011A4 (en) | 2004-08-18 | 2005-08-18 | Led control utilizing dynamic resistance of leds |
| CA002575546A CA2575546C (en) | 2004-08-18 | 2005-08-18 | Led control utilizing dynamic resistance of leds |
| US11/573,931 US7712925B2 (en) | 2004-08-18 | 2005-08-18 | LED control utilizing dynamic resistance of LEDs |
| CN2005800307235A CN101019467B (en) | 2004-08-18 | 2005-08-18 | LED control utilizing dynamic resistance of LEDs |
| US11/676,430 US7658510B2 (en) | 2004-08-18 | 2007-02-19 | System and method for power control in a LED luminaire |
| HK07113696.3A HK1105509A1 (en) | 2004-08-18 | 2007-12-17 | Led control utilizing dynamic resistance of leds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002478001A CA2478001A1 (en) | 2004-08-18 | 2004-08-18 | Led light bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2478001A1 true CA2478001A1 (en) | 2006-02-18 |
Family
ID=35852055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002478001A Abandoned CA2478001A1 (en) | 2004-08-18 | 2004-08-18 | Led light bulb |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101019467B (en) |
| CA (1) | CA2478001A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009021695A1 (en) * | 2007-08-10 | 2009-02-19 | Osram Gesellschaft mit beschränkter Haftung | Led lamp |
| US8143769B2 (en) | 2008-09-08 | 2012-03-27 | Intematix Corporation | Light emitting diode (LED) lighting device |
| US8616714B2 (en) | 2011-10-06 | 2013-12-31 | Intematix Corporation | Solid-state lamps with improved radial emission and thermal performance |
| US8992051B2 (en) | 2011-10-06 | 2015-03-31 | Intematix Corporation | Solid-state lamps with improved radial emission and thermal performance |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175046A (en) * | 2011-12-20 | 2013-06-26 | 西安智海电力科技有限公司 | Light-homogenized heat dissipation light-emitting diode (LED) ceiling lamp with installation plate |
| US8716948B2 (en) * | 2012-03-13 | 2014-05-06 | Dialog Semiconductor Inc. | Dynamic control of power switching bipolar junction transistor |
| KR101981717B1 (en) * | 2012-05-10 | 2019-05-24 | 엘지이노텍 주식회사 | Lighting device |
| CN107301927B (en) * | 2017-08-24 | 2019-07-09 | 福鼎诺一家居设计有限公司 | Photoelectric power switch |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025204A (en) * | 1990-01-05 | 1991-06-18 | Hewlett-Packard Company | Current mirror using resistor ratios in CMOS process |
| US6600274B1 (en) * | 2001-12-14 | 2003-07-29 | Dme Corporation | LED current regulation circuit for aircraft lighting system |
| US6693394B1 (en) * | 2002-01-25 | 2004-02-17 | Yazaki North America, Inc. | Brightness compensation for LED lighting based on ambient temperature |
-
2004
- 2004-08-18 CA CA002478001A patent/CA2478001A1/en not_active Abandoned
-
2005
- 2005-08-18 CN CN2005800307235A patent/CN101019467B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009021695A1 (en) * | 2007-08-10 | 2009-02-19 | Osram Gesellschaft mit beschränkter Haftung | Led lamp |
| US8662712B2 (en) | 2007-08-10 | 2014-03-04 | Osram Ag | LED lamp |
| US8143769B2 (en) | 2008-09-08 | 2012-03-27 | Intematix Corporation | Light emitting diode (LED) lighting device |
| US8616714B2 (en) | 2011-10-06 | 2013-12-31 | Intematix Corporation | Solid-state lamps with improved radial emission and thermal performance |
| US8992051B2 (en) | 2011-10-06 | 2015-03-31 | Intematix Corporation | Solid-state lamps with improved radial emission and thermal performance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101019467A (en) | 2007-08-15 |
| CN101019467B (en) | 2013-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2005274629B2 (en) | LED control utilizing dynamic resistance of LEDs | |
| US7658510B2 (en) | System and method for power control in a LED luminaire | |
| US11598507B2 (en) | High intensity light-emitting diode luminaire assembly | |
| JP5542658B2 (en) | LED-type luminaire and related method for temperature management | |
| CN103052844B (en) | LED lighting module and use the illuminating lamp of this LED lighting module | |
| US7784969B2 (en) | LED based light engine | |
| US20090296387A1 (en) | Led retrofit light engine | |
| US20110291588A1 (en) | Light fixture with an array of self-contained tiles | |
| US9103540B2 (en) | High efficiency LED lighting system with thermal diffusion | |
| US10352547B2 (en) | Lighting devices, fixture structures and components for use therein | |
| WO2012077851A1 (en) | Louver type led lighting apparatus using dye-sensitized solar cell | |
| US20120257374A1 (en) | Led lamp | |
| US8360622B2 (en) | LED light source in incandescent shaped light bulb | |
| EP2376834A1 (en) | Led lamp system | |
| CN101019467B (en) | LED control utilizing dynamic resistance of LEDs | |
| US20100148652A1 (en) | Solid state lighting | |
| KR101202821B1 (en) | Eco-friendly diffuser type LED luminaire with DSSCDye-sensitized solar cell | |
| CN201416764Y (en) | LED lamp | |
| CN201992367U (en) | Super-high-power light-emitting diode (LED) lighting lamp | |
| CA2575546C (en) | Led control utilizing dynamic resistance of leds | |
| CN205909112U (en) | Photo engine integral type down lamp | |
| CN201651871U (en) | LED energy-saving lamp with radiator capable of freely circulating air | |
| CN201083370Y (en) | LED lamp | |
| CN101165397A (en) | Multiple heat dissipation energy-saving lighting lamp | |
| Lishik et al. | Structural and Technological Solutions for Light-Emitting Diode Lamps of Direct Replacement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20140819 |
|
| FZDE | Discontinued |
Effective date: 20140819 |