CA2634475A1 - Led-based inspection lamp with improved collimation optics - Google Patents

Led-based inspection lamp with improved collimation optics Download PDF

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Publication number
CA2634475A1
CA2634475A1 CA002634475A CA2634475A CA2634475A1 CA 2634475 A1 CA2634475 A1 CA 2634475A1 CA 002634475 A CA002634475 A CA 002634475A CA 2634475 A CA2634475 A CA 2634475A CA 2634475 A1 CA2634475 A1 CA 2634475A1
Authority
CA
Canada
Prior art keywords
led
lamp
leds
radiation
transistor
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.)
Granted
Application number
CA002634475A
Other languages
French (fr)
Other versions
CA2634475C (en
Inventor
Donald L. Klipstein
Jack Brass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alltemp Products Co Ltd
Original Assignee
Brasscorp Limited
Donald L. Klipstein
Jack Brass
Cliplight Holdings, Ltd.
Alltemp Products Company Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brasscorp Limited, Donald L. Klipstein, Jack Brass, Cliplight Holdings, Ltd., Alltemp Products Company Limited filed Critical Brasscorp Limited
Publication of CA2634475A1 publication Critical patent/CA2634475A1/en
Application granted granted Critical
Publication of CA2634475C publication Critical patent/CA2634475C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/005—Electric lighting devices with self-contained electric batteries or cells the device being a pocket lamp
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/02—Electric lighting devices with self-contained electric batteries or cells characterised by the provision of two or more light sources
    • F21L4/022—Pocket lamps
    • F21L4/027—Pocket lamps the light sources being a LED
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0414—Arrangement of electric circuit elements in or on lighting devices the elements being switches specially adapted to be used with portable lighting devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6447—Fluorescence; Phosphorescence by visual observation
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/06—Electric lighting devices with self-contained electric batteries or cells with the light source coupled to the remainder of the device solely by cable
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0075—Reflectors for light sources for portable lighting devices
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. For an inspection lamp, the LEDs typically have a peak wavelength of 395 to 415 naometers for seeing the area being irradiated but not so visible as to overwhelm fluorescence of fluorescent materials to be detected. Other wavelengths may be used. LED inspection lamp has a combination of LEDs of different wavelengths or a combination of at least one LED and at least one other light source such that the lamp produces radiation suitable for detection of materials to be detected and adequately illuminates the area being irradiated. LED lamp has LEDs that produce a beam of suitable radiation with a width of 10 degrees or less without additional optics. LED inspection lamp has head attached to a flexible member, with head serving as heatsink for one or more high power LEDs. Current regulator circuits are also disclosed.

Claims (16)

1. An inspection lamp, comprising two or more LEDs that produce radiation that is suitable for causing fluorescence of fluorescent materials, and further comprising a number of transparent optics equal to the number of LEDs, each optic associated with a respective one of the two or more LEDs to collimate the radiation into a beam, wherein the transparent optics use total internal reflection for at least part of the collimation purposes.
2. The lamp of claim 1, wherein a surface of the transparent optic associated with each of the two or more LEDs has a textured surface to act as a diffuser.
3. An inspection lamp, comprising:

a) a head section that contains one or more light emitting diodes, b) a handle section such that the inspection lamp can be hand held, c) one or more light emitting diodes that produce radiation that is suitable for causing fluorescence of visibly fluorescent materials, d) and a lens forward of each of said light emitting diodes to collimate the exciting radiation into a beam, wherein the lens forward of at least one light emitting diode is aspheric.
4. An inspection lamp comprising a head, a handle, and a flexible member connecting the head to the handle, and further comprising at least one LED, wherein the head conducts heat from the at least one LED, and wherein at least one light emitting diode produces radiation that is suitable for causing fluorescence of visibly fluorescent materials.
5. An inspection lamp suitable for the detection of fluorescent materials, having an LED that produces radiation suitable for causing visible fluorescence of said fluorescent materials, wherein the LED is a side emitting type such that its radiation is easily collimated into a beam by a reflector, and further having such a reflector to collimate the radiation produced by said LED into a beam.
6. An inspection lamp suitable for the detection of fluorescent materials, having an LED that produces radiation suitable for causing visible fluorescence of said fluorescent materials, wherein the LED is a side emitting type such that its radiation is easily collimated into a beam by a reflector, and further having a combination of such a reflector and at least one lens forward of said reflector to collimate the radiation produced by said LED into a beam.
7. An inspection lamp, comprising: at least one LED and a boost converter suitable for operating at least one LED in the lamp using a battery that has a voltage less than that required to operate the at least one LED, wherein at least one LED produces radiation that is suitable for causing fluorescence of visibly fluorescent materials.
8. The lamp of claim 7, wherein the boost converter comprises:

an inductor, a diode, and a transistor arranged so that current flowing through said inductor is intermittently increased as a result of said transistor being in a conductive state and forced to decrease and flow through said LED when said transistor is in a nonconductive state, a current sensing resistor that any current flowing through the inductor always flows through, and a comparator that switches said transistor alternatively into a conductive state and a nonconductive state according to the magnitude of the current that is flowing through said current sensing resistor.
9. The lamp of claim 7, wherein the boost converter further comprises means to shut itself down if the power supply voltage is excessively low.
10. The lamp of claim 7, wherein the boost converter further comprises means to shut itself down if its output voltage becomes excessive as a result of failure of an LED in the lamp to conduct current.
11. The lamp of claim 7, wherein the boost converter further comprises means to regulate the amount of power that it delivers to an LED should the voltage of the power supply that said boost converter receives power from vary within a range of voltages that said power supply typically has.
12. An inspection lamp, comprising at least one LED that produces radiation suitable for causing fluorescence of visibly fluorescent materials and a boost converter that comprises:

an inductor, a diode, and a transistor arranged so that current flowing through said inductor is intermittently increased as a result of said transistor being in a conductive state and forced to decrease and flow through said LED when said transistor is in a nonconductive state, and an oscillator that alternatively switches said transistor into its conductive state and its nonconductive state.
13. An inspection lamp, comprising at least one LED that produces radiation suitable for causing fluorescence of visibly fluorescent materials and a boost converter that comprises:

an inductor, a diode, and a transistor arranged so that current flowing through said inductor is intermittently increased as a result of said transistor being in a conductive state and forced to decrease and flow through said LED when said transistor is in a nonconductive state, a current sensing resistor that any current flowing through said inductor always flows through, and a linear timer integrated circuit arranged to alternately switch said transistor into its conductive and nonconductive states according to the magnitude of the current through said current sensing resistor.
14. The lamp of claim 7, further comprising a current regulator to regulate the amount of current flowing to the at least one LED.
15. The lamp of claim 14, wherein the current regulator is a switching current regulator.
16. The lamp of claim 7 further comprising means to strobe any one of the at least one LEDs.
CA2634475A 2003-07-07 2004-07-06 Led-based inspection lamp with improved collimation optics Active CA2634475C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US48106203P 2003-07-07 2003-07-07
US60/481,062 2003-07-07
US48198604P 2004-02-01 2004-02-01
US60/481,986 2004-02-01
US52127604P 2004-03-24 2004-03-24
US60/521,276 2004-03-24
CA002473063A CA2473063C (en) 2003-07-07 2004-07-06 Led lamps and led driver circuits for the same

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002473063A Division CA2473063C (en) 2003-07-07 2004-07-06 Led lamps and led driver circuits for the same

Publications (2)

Publication Number Publication Date
CA2634475A1 true CA2634475A1 (en) 2005-01-07
CA2634475C CA2634475C (en) 2014-05-20

Family

ID=34069093

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2634475A Active CA2634475C (en) 2003-07-07 2004-07-06 Led-based inspection lamp with improved collimation optics
CA002473063A Active CA2473063C (en) 2003-07-07 2004-07-06 Led lamps and led driver circuits for the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002473063A Active CA2473063C (en) 2003-07-07 2004-07-06 Led lamps and led driver circuits for the same

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US (4) US7214952B2 (en)
CA (2) CA2634475C (en)

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US20050007777A1 (en) 2005-01-13
US7214952B2 (en) 2007-05-08
US7950818B2 (en) 2011-05-31
US7490951B2 (en) 2009-02-17
US20110211350A1 (en) 2011-09-01
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US20090161351A1 (en) 2009-06-25
US8388167B2 (en) 2013-03-05
US20070217188A1 (en) 2007-09-20
CA2473063C (en) 2008-09-16

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