Abstract: A lighting system protection circuit is adapted to receive a rectified AC input voltage, with a voltage threshold detector. The circuit is configured to pass current to the protected lighting system below the predetermined voltage threshold and to shut off current above the predetermined value.

Abstract: A display case having end jamb lighting module and a center mullion lighting module is disclosed. The lighting modules include a shell and at least one substrate whereon lighting elements are mounted. The shell defines engagement slots used to affix the substrate to the shell, and an aperture allowing light from the lighting elements to be projected out. The lighting module may include a second substrate upon which electrical components are mounted, the electrical components for conditioning input power for the lighting elements. A reflective portion of the shell or a separate reflector mounted on the shell operates on the light to form a desired spatial distribution of light. For robustness in construction, the lighting module end caps allow the secure passage of wires.

Abstract: A display case having end jamb lighting module and a center mullion lighting module is disclosed. The lighting modules include a shell and at least one substrate whereon lighting elements are mounted. The shell defines engagement slots used to affix the substrate to the shell. The shell defines an aperture allowing light from the lighting elements to be projected out. The lighting module may include a second substrate upon which electrical components are mounted, the electrical components for conditioning input power for the lighting elements. A reflective portion of the shell or a separate reflector mounted on the shell operates on the light to form a desired spatial distribution of light. An optical cover covers the aperture. The center mullion lighting module can include a third substrate for mounting of lighting elements. Alternatively, the center mullion lighting module can be formed by combining two end jamb lighting modules.

Abstract: A lighting device includes a housing having an inner surface and outer surface and a plurality of LEDs mounted at the inner surface, the LEDs mounted in a radially symmetrical configuration. The inner surface may be made of or coated with reflective material. The lighting system may further include, individually or in any combination, following: heat sink fins mounted on the outer surface; a reflective plate for reflecting light in a desired direction; a reflective tube for redirecting light from the LEDs. The housing may include a cylindrical section and a conic section.

Abstract: A system for capacitively transferring power to LEDs using intrinsic circuit board capacitance is disclosed. The plates of the capacitor are foil on either side of an insulating substrate. An AC source may deliver energy to a circuit, featuring an intrinsic circuit board capacitor in series with an LED.

Abstract: A system for generating light using a blue or ultraviolet light emitter as excitation source for dispersed fluorescent material is disclosed. A light transmissive dispersant, which may colloidally suspend or chemically dissolve a fluorescent material, acts to distribute the fluorescent material over a spatial region. The combination of primary and secondary light emission results in a broader light spectrum than the primary emitter alone would produce. Extending the light transmissive dispersant medium containing fluorescent material over a spatial region spanning beyond point sources will minimize or eliminate bright spots, which might otherwise result from point sources. Use of a liquid dispersant may result in convective cooling of the emission sources.

Abstract: A lighting system is disclosed, including a first lighting module and a second lighting module connected parallel to the first lighting module. The first lighting module, with a first activation voltage, generates light at a first color temperature and the second lighting module, with a second activation voltage, generates light at a second color temperature. The two lighting modules generate light when current flows through them. When input voltage is changed, both the amount of current flowing through the two modules changes and the ratio of current flowing through the two lighting modules changes. The change in ratio changes the color temperature of the light produced by the lighting system resulting from combination of the light produced by the two modules. The combined output brightness and color temperature each change with applied power in such a way to emulate the lighting profile of an incandescent lamp.

Abstract: A lighting device includes a housing having an inner surface and outer surface and a plurality of LEDs mounted at the inner surface, the LEDs mounted in a radially symmetrical configuration. The inner surface may be made of or coated with reflective material. The lighting system may further include, individually or in any combination, following: heat sink fins mounted on the outer surface; a reflective plate for reflecting light in a desired direction; a reflective tube for redirecting light from the LEDs. The housing may include a cylindrical section and a conic section.

Abstract: A low THD lighting system is disclosed. The lighting system includes a first lighting module and a second lighting module connected parallel to the first lighting module. During each AC cycle the first lighting module conducts current for a first portion of the cycle and the second lighting module conducts current for a second portion of the cycle. When combined, the total current drawn from the power source substantially tracks the shape of the applied AC voltage. Accordingly, there is minimal distortion, and low total harmonic distortion level is achieved.

Abstract: A shut-down circuit configured for use with an electronic ballast coupled to a lamp in a control path includes a device for sensing the electrical energy associated with the control path, and a sensing circuit for shutting down the ballast in the event that the energy does not conform to a predetermined condition. The sensed energy may be current indicative of lamp installation or short circuit, or voltage indicative of arcing or open circuit. The device for sensing the electrical energy associated with the control path may be an isolation transformer, or alternative devices such as optical isolators may be employed. The circuitry may further include electronic componentry to disable the sensing circuit during initial energization of the lamp.

Abstract: A shut-down circuit configured for use with an electronic ballast coupled to a lamp in a control path includes a device for sensing the electrical energy associated with the control path, and a sensing circuit for shutting down the ballast in the event that the energy does not conform to a predetermined condition. The sensed energy may be current indicative of lamp installation or short circuit, or voltage indicative of arcing or open circuit. The device for sensing the electrical energy associated with the control path may be an isolation transformer, or alternative devices such as optical isolators may be employed. The circuitry may further include electronic componentry to disable the sensing circuit during initial energization of the lamp.

Abstract: A display case having end jamb lighting module and a center mullion lighting module is disclosed. The lighting modules include a shell and at least one substrate whereon lighting elements are mounted. The shell defines engagement slots used to affix the substrate to the shell. The shell defines an aperture allowing light from the lighting elements to be projected out. The lighting module may include a second substrate upon which electrical components are mounted, the electrical components for conditioning input power for the lighting elements. A reflective portion of the shell or a separate reflector mounted on the shell operates on the light to form a desired spatial distribution of light. An optical cover covers the aperture. The center mullion lighting module can include a third substrate for mounting of lighting elements. Alternatively, the center mullion lighting module can be formed by combining two end jamb lighting modules.

Abstract: A shut-down circuit configured for use with an electronic ballast coupled to a lamp in a control path includes a device for sensing the electrical energy associated with the control path, and a sensing circuit for shutting down the ballast in the event that the energy does not conform to a predetermined condition. The sensed energy may be current indicative of lamp installation or short circuit, or voltage indicative of arcing or open circuit. The device for sensing the electrical energy associated with the control path may be an isolation transformer, or alternative devices such as optical isolators may be employed. The circuitry may further include electronic componentry to disable the sensing circuit during initial energization of the lamp.

Abstract: An integrated and modular lighting system is disclosed. The lighting system includes a plurality of modules, each module including at least two echelons of light emitting diodes and a power supply on a common substrate. The modular lighting system is used to provide uniform illumination of an enclosed display stand.

Abstract: An integrated and modular lighting system is disclosed. The lighting system includes a plurality of modules, each module including at least two echelons of light emitting diodes and a power supply on a common substrate. The modular lighting system is used to provide uniform illumination of an enclosed display stand.

Abstract: An integrated and modular lighting system is disclosed. The lighting system includes a plurality of modules, each module including at least two echelons of light emitting diodes and a power supply on a common substrate. The modular lighting system is used to provide uniform illumination of an enclosed display stand.

Abstract: A lighting system is disclosed. The lighting system includes a first lighting module and a second lighting module connected parallel to the first lighting module. The first lighting module generates light at a first color temperature and the second lighting module generates light at a second color temperature. The first lighting module has a first activation voltage and the second lighting module has a second activation voltage. The two lighting modules generate light when the current flow through them. When input voltage is changed, not only does the amount of current flowing through the two modules change, but also ratio of the amount of current flowing through the two lighting modules changes. The change in the ratio changes the color temperature of the light produced by the lighting system which is a combination of the light produced by the two modules.

Abstract: An integrated and modular lighting system is disclosed. The lighting system includes a plurality of modules, each module including at least two echelons of light emitting diodes and a power supply on a common substrate. The modular lighting system is used to provide uniform illumination of an enclosed display stand.

Abstract: A fiber optic display sign is provided comprising a plurality of magnetically actuatable indicator elements, each having associated therewith at least two fiber optic cables for transmitting light. Each of the fiber optic cables has an end face for emitting light which terminates in an indicator element, and an end face for receiving light which is positioned in close proximity with the other light receiving end faces to form a light receiving surface. A light source assembly moveable with respect to the light receiving surface includes a primary light source and a secondary light source each adapted to illuminate the light receiving surface when aligned therewith. The light source assembly is alternatively moveable to a first position at which the primary light source is aligned with the light receiving surface or a second position at which the secondary light source is aligned with the light receiving surface.

Abstract: A heavy duty flasher for incandescent lamps for a motor coach or the like incorporates a pair of power MOSFETs in parallel for efficient, cool operation and includes a pair of timers, one for flash rate control and the other for producing AC for operating a voltage multiplier to provide gate voltage for the MOSFETs. Protective circuitry senses current overload and terminates current flow to protect the power devices while allowing inrush current to the lamps at the beginning of each cycle. A circuit sensitive to the presence of load supplies power to the timers only under load conditions.