236 results about "Compact fluorescent lamp" patented technology

A multiple function lighting fixture that uses compact fluorescent lamps (CFL), and circular fluorescent lamps positioned in strategic locations inside a lampshade. A shield within the lampshade divides the area into a primary interior zone and a secondary interior zone. One of the respective lamps is located in each of the respective interior zones. One of the lamps provides for upwardly directed light and the other lamp provides downwardly directed light. The inner and outer surfaces of the shield may have reflective properties. The lampshade may have portions thereof having light transmitting properties. The inner surface of the lampshade may have reflective properties in some areas. LEDs may be mounted in various areas of the respective primary interior zone and secondary interior zones. The light fixture may also have dimmer control switches/sensors and there may be sensors for remote control operation for turning the respective lamps on and off.

A track lighting system which supports compact fluorescent lamp fixtures removably attached to a track member by a track adaptor. Compact fluorescent lamp fixture depends from a track adaptor by an adjustable suspended cable. Suspended cable provides electricity and mechanical support to a compact fluorescent socket and lamp. The track adaptor may also accommodate line voltage fixtures and allows a user to adjust the suspended cable by cutting the cable, stripping internal cable wires, then inserting internal wires into the track adaptor cavities and securing with securing screws.

This compact fluorescent lamp comprises a discharge tube arrangement with at least one discharge tube. The tube is formed of glass, encloses a discharge volume filled with a discharge gas and has a fluorescent phosphor coating disposed on the inner surface of the tube. The tube forms a continuous arc path and the tube is provided with electrodes disposed at each end of the arc path. The lamp also comprises a ballast circuit connected to the electrodes for controlling the current in the tube and a lamp base for connecting said lamp to a power supply through a socket. The lamp is enclosed in an outer envelope comprising a substantially spherical portion enclosing the tube arrangement and an elongated end portion enclosing the ballast circuit. The end portion of the outer envelope is closed and sealed by a sealing means of the same material as the material of the outer envelope. The sealing means is connected to the envelope in a hermetically sealing way. A method for manufacturing a compact fluorescent lamp as described above is also disclosed. In the method, an outer envelope with an open end on the base side is provided. The open end of the envelope is closed and sealed with a sealing means to provide a hermetic seal. The envelope is separated by cutting along a circumferential line into an upper part and a lower part. The ballast circuit is introduced into the lower part and respective connection points of the ballast circuit are connected to power supply lead-out wires. The discharge tube arrangement is connected to respective connection points of the ballast circuit by lead-in wires. The lead-in wires and the lead-out wires are short and need not be insulated. The ballast circuit and the discharge tube arrangement are held and supported in the outer envelope by the connecting wires and fixing means.

Disclosed is a cover for a compact fluorescent light employing a two piece clamshell shape assimilating a conventional incandescent light bulb. The cover is formed from two clamshells hingedly secured along a top end having inter-engaging means for securing one clamshell to a second clamshell tightly securing the cover to the base of a compact fluorescent light. In the preferred embodiment, the housing is made of material to reduce or eliminate ultraviolet light produced from a gas discharge lamp and provide a cover that can be decorative through the emulation of a conventional incandescent light bulb or decorated with colors and materials wherein the fluorescent light provides back lighting or where images are placed upon the housing so as to allow the back lighting to operate as a projection surface placing images on a wall separate from the light bulb.

The operating frequency of a ballast is sufficiently far from resonance that, when a compact fluorescent lamp is dimmed to about one percent light output level, the ballast is operating with an open loop gain below a predetermined level, such as, for example, 15, and is operating with an output impedance greater than a predetermined level, such as, for example, the absolute value of the maximum negative incremental impedance of the lamp, and more preferably, greater than twice the absolute value of the maximum negative incremental impedance of the lamp. By changing the frequency to 85 kHz from 80 kHz, for example, the gain is maintained about the same whether the light output is at five percent or one percent, for example. This provides a stable control loop. In this manner, compact fluorescent lamps can be dimmed below about one percent light output, without dropping out and without observable flicker.

An apparatus that prevents the interchange or replacement of an expensive compact fluorescent lamp with a standard inexpensive incandescent bulb to diminish thefts of the more expensive lamp, by using a locking lamp socket insert in combination with newly designed screw lamp base that permits the operation of the compact fluorescent lamp. Should the compact fluorescent lamp be substituted with a standard inexpensive incandescent bulb, the center contact in the base of the incandescent bulb cannot touch the centrally located leaf-spring contact of the lamp socket, thereby preventing the incandescent bulb from operating. The lamp socket insert is a rigid plastic material such as nylon, shaped as a flat disk with three tangential cantilever, spaced apart vanes. A pointed end of each tine permits the insert to rotate upon insertion, but a counterclockwise rotation causes the tines to bite into the interior socket sidewalls preventing its counter-rotation and removal.

A lighting system includes a controller that is configured to provide thermal management for the lighting system by distributing excess energy in the lighting system through multiple power dissipation circuits. In at least one embodiment, the lighting system is a phase cut compatible, dimmable lighting system having one or more light sources selected from a group consisting of at least one light emitting diode and at least one compact fluorescent lamp. In at least one embodiment, the controller is configured to control the plurality of power dissipation circuits in accordance with a thermal management strategy to dissipate the excess energy in the phase cut compatible, dimmable lighting system. The particular thermal management strategy is a matter of design choice. The power distribution circuits include two of more of: a controlled switch path power dissipation circuit, a controlled link path power dissipation circuit, and a controlled flyback path power dissipation circuit.

A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-DC converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a DC voltage representative of the duty cycle of the phase-control voltage. Changes in the duty cycle of the phase-control voltage that are below a threshold amount are filtered out by the converter circuit, while intentional changes in the duty cycle of the phase-control voltage are reflected in changes in the target intensity level and thereby the intensity level of the lamp tube.

A fluorescent lamp ballast circuit including a phase cut dimmer connectable to a source of AC power, the selectable phase cut dimmer and an electronic switch having a trigger voltage and a conduction period, when the electronic switch triggers to the end of the half cycle, a rectifying and charging circuit coupled to the output of the phase cut dimmer for providing a DC voltage across a DC bus, a filter circuit receiving the output of said phase cut dimmer and converting the output to a control signal related to the firing angle of the electronic switch; an output stage coupled to the lamp, the output stage having at least one electronic switching device; the ballast control circuit including a control input for changing a frequency of said pulsed power signal, the control input being coupled to said control signal, the control signal varying in accordance with the firing angle of he electronic switch, thereby varying the brightness level of said fluorescent lamp.

A portable worklight providing a high level of substantially omni-directional illumination. Briefly, the worklight includes an elongate lamp section including one or more lamp sockets for receiving one or more small fluorescent lamps such as compact fluorescent lamps of the screw-in variety. The lamp section includes a substantially transparent shield about the lamps and is structured and arranged to provide illumination substantially in a full circle about the lamp section. The lamp section is retractable into an elongate base section that is shaped and structured to receive the lamp section snugly in its interior. In the retracted configuration the worklight forms a compact unit for carrying, transporting and storing the worklight. The worklight may also include legs that may be retracted along the base section and deployed for supporting the worklight during use.

An electronic lighting system and method described herein control energy provided to an electronic lighting device, such as one or more light-emitting diodes (LEDs) and/or compact fluorescent lamps (CELs), of the electronic lighting system. A triac-based dimmer phase cuts a line voltage provided to the electronic lighting system. A controller of the electronic lighting system utilizes a probing system to overcome idiosyncrasies of the triac-based dimmer to allow the controller to probe and sense the line voltage. To reduce energy consumption, rather than probing each cycle of the output voltage of the triac-based dimmer, the controller periodically or intermittently probes the output voltage of the triac-based dimmer.

An electronic ballast circuit and related method for enabling full range dimming of a gas discharge load such as a compact fluorescent lamp.

This light emitting LED device provides a 360 degree lighting angle in the horizontal plane and a 300 degree lighting angle in the vertical plane while simultaneously addressing LED die thermal management; critical to high lumen output LEDs.

This LED lighting device is comprised of the LED lens, the LED holder and the heat sink stem.

Light produced by at least one LED die traveling vertically is diffused by the top refractive portion of the lens. Light rays directed towards the pointed elements are totally internally reflected downwards then refracted out of the lens, thus resulting in a spherical light pattern.

This technology is designed as a replacement for conventional light sources, such as; incandescent light bulbs, halogen bulbs, CFLs (compact fluorescent lamps) and metal halide lamps.

Method for varying the power consumption of capacitive loads, in particular compact fluorescent lamps which are operated using a phase-gating dimmer by a converter (step-up converter). According to the invention, in the case of a nonconducting dimmer (i.e. no system power supply to the load), the switch (T1) in the converter (step-up converter) is closed. In the case of a conducting dimmer (i.e. when a system voltage is applied to the load), the step-up converter operation takes place until a predetermined maximum voltage is reached across the smoothing capacitor of the load.

A ballast circuit for controlling preheating, ignition or performing dimming of a gas discharge lamp such as a compact fluorescent lamp is disclosed. The ballast circuit has an inverter connected to a pair of input terminals for receiving a supply voltage, a base drive transformer connected to the switching transistor inverter to provide a drive signal, a resonant circuit connected to the switching transistor inverter, and a loading circuit connected to the base drive transformer. The base drive transformer includes a primary winding and a secondary winding set. The loading circuit is adapted for at least temporarily saturating the base drive transformer and thus effecting in the resonant circuit an oscillating frequency different from a natural resonant frequency of the resonant circuit.

The present invention relates to a compact 3-way fluorescent lamp that is designed to serve as a replacement for a 3-way incandescent bulb. This novel compact 3-way fluorescent lamp uses only two fluorescent tubes, where one tube has twice the wattage rating of the smaller rated tube. The lower wattage unit is a single U-shaped tube and the higher wattage unit is comprised of a pair of U-shaped tubes, having a cross connection at the base of the tubes, giving a continuous gas discharge path through a first U-shaped tube, a cross connecting element, and a second U-shaped tube. Therefore, this lamp gives the appearance of a triple biaxial fluorescent lamp having three U-shaped units, spaced 120 degrees apart, and mounted to the top surface of a ballast housing cover. Two electronic ballasts ignite and operate the two lamp units-a low wattage ballast operates the low wattage unit, the medium wattage ballast operates the dual U-shaped medium wattage unit, and when both units are operational, the highest wattage level is attained. Each of the ballast circuits is optimized to give an enhanced high voltage ignition, thereby eliminating the need for an auxiliary ignition electrode. A pi-section EMI filter suppresses the electromagnetic interference that emanates from the MOSFETs as a result of their switching. Fire hazard protection is given by an internal fusible link.