LED lamps and LED driver circuits for the same
First Claim
1. A inspection lamp, comprising:
- a) a head section that contains one or more light emitting diodes that emit radiation, a majority of which radiation is directed generally rearwards within the head section,b) a handle section such that the lamp can be hand held, andc) a concave reflector for receiving and collimating a majority of the rearwardly directed radiation into a beam,wherein at least one light emitting diode produces radiation that is suitable for causing fluorescence of visibly fluorescent materials.
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Accused Products
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.
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Citations
25 Claims
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1. A inspection lamp, comprising:
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a) a head section that contains one or more light emitting diodes that emit radiation, a majority of which radiation is directed generally rearwards within the head section, b) a handle section such that the lamp can be hand held, and c) a concave reflector for receiving and collimating a majority of the rearwardly directed radiation into a beam, wherein at least one light emitting diode produces radiation that is suitable for causing fluorescence of visibly fluorescent materials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. 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.
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21. An inspection lamp, comprising at least one LED that produces radiation that is suitable for causing fluorescence of visibly fluorescent materials and a boost converter that comprises:
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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.
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22. An inspection lamp, comprising at least one LED that produces radiation that is suitable for causing fluorescence of visibly fluorescent materials and a boost converter that comprises:
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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.
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23. An inspection lamp, comprising:
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a) a head section that contains one or more light emitting diodes that emit radiation, a majority of which radiation is directed generally rearwards within the head section, b) a handle section such that the lamp can be hand held, and c) a concave reflector for receiving and collimating a majority of the rearwardly directed radiation into a beam, wherein at least one light emitting diode produces radiation that is suitable for causing fluorescence of visibly fluorescent materials, and wherein the head section conducts heat from the one or more light emitting diodes.
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24. An inspection lamp, comprising:
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a) a head section that contains one or more light emitting diodes that emit radiation, a majority of which radiation is directed generally rearwards within the head section, b) a handle section such that the lamp can be hand held, and c) a concave reflector for receiving and collimating a majority of the rearwardly directed radiation into a beam, wherein at least one light emitting diode produces radiation that is suitable for causing fluorescence of visibly fluorescent materials, wherein the reflector comprises a transparent optic to collimate the radiation into a beam, and wherein the transparent optic uses total internal reflection for at least part of the collimation of the beam. - View Dependent Claims (25)
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Specification