Abstract:
Improved ultraviolet field-emission lamps can be safely deployed close to people because they eliminate the use of toxic materials, mitigate heating issues, and emit light in a wavelength range that is safe for human exposure.
Abstract:
A writing gas light system has a gas tube with a first end and a second end. A first cathode is attached to a first end of the gas tube and a second cathode is attached to a second end of the gas tube. An isolated conductor runs along a length of the gas tube and is electrically attached to the second cathode. A light ballast is coupled to the first cathode and to the isolated conductor. In one embodiment, the system has a digitally controlled ballast. The gas discharge ballast has an output applied to the gas tube whose energy can be adjusted. The system has a balanced center tap transformer. The secondary of the transformer is tied to ground through a ground fault detection circuit.
Abstract:
A laser sustained plasma light source includes a plasma bulb containing a working gas flow driven by an electric current sustained within the plasma bulb. Charged particles are introduced into the working gas of the plasma bulb. An arrangement of electrodes maintained at different voltage levels drive the charged particles through the working gas. The movement of the charged particles within the working gas causes the working gas to flow in the direction of movement of the charged particles by entrainment. The resulting working gas flow increases convection around the plasma and increases laser to plasma interaction. The working gas flow within the plasma bulb can be stabilized and controlled by control of the voltages present on the each of the electrodes. A more stable flow of working gas through the plasma contributes to a more stable plasma shape and position within the plasma bulb.
Abstract:
A flat discharge lamp transmitting radiation in ultraviolet or visible, including first and second flat, or substantially flat, glass elements substantially parallel to each other and defining an internal space filled with gas, the first and/or second glass element being made of a material that transmits the radiation; at least one first electrode and at least one second electrode, which may be at different potentials and may be supplied by an AC voltage, the first and second electrodes being associated with one or more main faces of the first glass element, the first and second electrodes being essentially elongate and substantially parallel to one another, and separated by at least one interelectrode space of given width substantially constant; and at least one third electrode which may be at a given potential associated with a main face of the second glass element and at least partly occupying, in projection, the interelectrode space.
Abstract:
A flat or substantially flat light-emitting and/or UV (ultraviolet)-emitting structure including first and second dielectric walls facing each other and defining an internal space containing a light source, first and second electrodes for the light source, which generate electric field lines with at least one component perpendicular to the first and second electrodes, the first electrode being supplied or capable of being supplied by a high-frequency electromagnetic signal f0, and as an outer cover for the first electrode, an electrical safety system that includes an electrical conductor separated from the first electrode by a dielectric, the protective conductor being connected or capable of being connected to an electrical power supply with a potential V and/or with a frequency f that are adjusted so that the peak value of external leakage current is equal to 2 mA or less if f is zero, or 0.7 mA or less if f is non-zero.
Abstract:
A fluorescent lamp with a multiple electrodes at each input, where 3 to 8 electrodes may be installed in a single electrode holder sealed at each end of the fluorescent lamp tube. In operation, electron discharge primarily only occurs from one electrode at each input end, which has smallest resistance. With multiple electrodes, the electron discharge function at each input end will last one to several times longer, compared with the input end with just a single electrode. Because the life span of the fluorescent lamp depends on the electron discharge function at each input end, multiple electrodes at each input end increases the overall service life of the lamp. This invention increases cost-effectiveness of the fluorescent lamp without requiring complex structural modifications.
Abstract:
A lamp radiates visible light and infrared light. The lamp bulb of the lamp includes at least a first region which is at least partly permeable to infrared light, and at least partly impermeable to visible light. At least a second region of the bulb is wholly or partly permeable at least to visible light.
Abstract:
A plasma lighting bulb is disclosed. The plasma lighting bulb includes a bulb emitting light, being formed of a transparent material, and having a plurality of grooves having a predetermined depth formed on a surface of the bulb, and a metal formed in the grooves, wherein a cross-section of the grooves is formed of one of a semicircular shape, a V-shape, and a polygonal shape.