Abstract: A light-emitting diode (LED) driver circuit monitors battery input current by way of a feedback resistor. The observed resistor voltage is provided to a regulator circuit which adjusts the current provided to the LED so as to hold the battery current substantially constant.

Abstract: A device having an active reversal protection system is described. The system includes a pair of MOSFETs connected to parallel battery power sources. When the batteries in one of the power sources are improperly installed, the voltage delivered by that power source closes the gate of its associated MOSFET. In normal operation, the MOSFETs are connected to a microprocessor configured to operate the device. In a preferred embodiment, the device is a lighting device incorporating a light emitting diode that is driven by the MOSFETs.

Abstract: A light-emitting diode (LED) driver circuit monitors battery input current by way of a feedback resistor. The observed resistor voltage is provided to a regulator circuit which adjusts the current provided to the LED so as to hold the battery current substantially constant.

Abstract: A device having an active reversal protection system is described. The system includes a pair of MOSFETs connected to parallel battery power sources. When the batteries in one of the power sources are improperly installed, the voltage delivered by that power source closes the gate of its associated MOSFET. In normal operation, the MOSFETs are connected to a microprocessor configured to operate the device. In a preferred embodiment, the device is a lighting device incorporating a light emitting diode that is driven by the MOSFETs.

Abstract: A lighting device is generally illustrated including a light body having forward facing light sources including a visible white light source, visible colored light source and an infrared light source. Additionally, a side facing light source is provided. The light body also includes switches for activating the visible light sources and a three-position switch for activating the IR light source and the side facing light source. The lighting device further includes boost circuitry for controlling electrical energy supplied to a light source.

Abstract: A lighting system (10) is provided that includes at least one lighting device (14A,14B,14C), a plurality of external power sources (20,22,24,26,27) and an internal power source (16) applying a first electrical current to illuminate at least one lighting source (18A,18B,18C), wherein the internal power source (16) supplies the first electrical current. Further, a fuel gauging system and method (1230) detects an electrochemical composition of a power source (16,20,22,24,26,27), which can be at least one of the internal power source (16) and the external power source (20,22,24,26,27), and then determines a state of charge of the power source (16,20,22,24,26,27) based upon the determined electrochemical composition of the power source (16,20,22,24,26,27).

Abstract: A lighting device is mounted onto a support structure, e.g., helmet. The lighting device includes a light body having forward facing light sources including a visible white light source, visible colored light source, an infrared light source and a side facing IFF light source. The light body includes switches for activating the visible light sources and a three-position switch for activating the IR and light sources. The light body mounts onto a mount assembly and includes a connector arrangement for slidably connecting to a platform of the mount assembly. A base member of the mount assembly includes a clamp that connects to a support structure. The light body and platform member may be swivelly moved relative to the base member by forcing the light body and platform member away from the base member and rotating the same. Also disclosed is boost circuitry, battery chemistry detection and control modes.

Abstract: A lighting device is generally illustrated having a light body having forward facing light sources including a visible white light source, visible colored light source and an infrared light source. Additionally, a side facing light source is provided. The light body also includes switches for activating the visible light sources and a three-position switch for activating the IR light source and the side facing light source. At least one switch is provided for turning at least one of the light sources on and off and further adjusting light intensity of the light source. The light source of the lighting device may further be controlled based on a detected chemistry composition of the power source.

Abstract: A lighting device in the form of a handheld flashlight includes a plurality of light sources, a housing, a three-position switch, and a second switch. The plurality of light sources may include a visible light source and a non-visible light source. The three-position switch selects one of a plurality of modes, for example, a visible light enabled mode, an infrared mode, and a lockout mode. The second switch is operative to control one of the plurality of light sources based on the selected operating mode.

Abstract: A lighting device includes a first lighting source, a second lighting source, and a controller. The first lighting source yields a first illumination pattern. The second lighting source yields a second illumination pattern. The patterns overlay to yield a third illumination pattern. The controller shifts available power between the first lighting source and the second lighting source.

Abstract: A lighting system is provided that includes at least one lighting device, at least one connector, and a plurality of external power sources. The at least one lighting device includes at least one lighting source, and an internal power source applying a first electrical current to illuminate the at least one lighting element, wherein the internal power source supplies the first electrical current. The at least one connector electrically connects to the at least one lighting device. The plurality of external power sources include at least first and second external power sources that are adapted to be electrically connected to the at least one lighting device by the at least one connector. Further, a fuel gauging system and method detects an electrochemical composition of a power source, which can be at least one of the internal power source and the external power source, and then determines a state of charge of the power source based upon the determined electrochemical composition of the power source.

Abstract: A lighting device embodied as a flashlight is provided that includes a handheld housing and a light source provided on the housing for generating a light beam. The light device also includes a battery power source for providing power to the light source. The lighting device further includes light control circuitry for turning the light source on and off and controlling intensity of the light beam. The light control circuitry includes a user actuatable switch and a controller for controlling intensity of the generated light beam. The controller processes user activation of the switch and adjusts the intensity of the light beam as a function of the activation of the switch such that the light intensity may be increased or decreased.

Abstract: A lighting device is generally illustrated having a light body having forward facing light sources including a visible white light source, visible colored light source and an infrared light source. Additionally, a side facing light source is provided. The light body also includes switches for activating the visible light sources and a three-position switch for activating the IR light source and the side facing light source. The light source of the lighting device may further be controlled based on a detected chemistry composition of the power source.

Abstract: A lighting system is provided that includes at least one lighting device, at least one connector, and a plurality of external power sources. The at least one lighting device includes at least one lighting source, and an internal power source applying a first electrical current to illuminate the at least one lighting element, wherein the internal power source supplies the first electrical current. The at least one connector electrically connects to the at least one lighting device. The plurality of external power sources include at least first and second external power sources that are adapted to be electrically connected to the at least one lighting device by the at least one connector. Further, a fuel gauging system and method detects an electrochemical composition of a power source, which can be at least one of the internal power source and the external power source, and then determines a state of charge of the power source based upon the determined electrochemical composition of the power source.

Abstract: A lighting system is provided that includes at least one lighting device, at least one connector, and a plurality of external power sources. The external power sources are adapted to be electrically connected to the lighting device by the connector. One of the external power sources is an energy storage system having a plurality of battery cells. A first charging method is utilized when a voltage potential of first and second battery cells is less than a voltage potential threshold, a second charging method is utilized when the voltage potential of the first and second battery cells is equal to or greater than the voltage potential threshold, and the first charging method is utilized to charge the first battery cell prior to charging the second battery cell when the first battery cell voltage potential is below the voltage potential threshold and greater than the second battery cell voltage potential.

Abstract: A portable lighting device and related method of operation is provided which includes a light source, a switch, a brightness control element, a display, a contact for receiving power, and a light source controller. The light source is illuminated by switch being moved to a first position at which light source controller supplies power to light source from power received through contact. Once power is on, brightness control element is used to adjust the brightness of light source. Brightness control element may be a ring having multiple predetermined brightness settings disposed thereon with a detent and visual indicia associated with each setting. The display displays one or more usage parameters associated with the operation of the device such as brightness, lumen output, power consumption, and remaining power available at the current brightness setting.

Abstract: A lighting device in the form of a handheld flashlight is provided that includes a plurality of light sources, a housing, a three position switch, and a second switch. The plurality of light sources may include a visible light source and a non-visible light source. The three position switch selects one of a plurality of modes, for example, a visible light enabled mode, an infra red mode, and a lockout mode. The second switch is operative to control one of the plurality of light sources based on the selected operating mode.