Abstract:
An external electrode lamp capable of preventing a lighting defect by easily emitting secondary electron within a lamp tube, a method of manufacturing the external electrode lamp, and a liquid crystal display apparatus using the external electrode lamp. The external electrode lamp includes a lamp tube filled with a discharge gas, an external electrode encompassing both ends of the lamp tube, and a conductive material disposed at an inner surface of the both ends of the lamp tube.
Abstract:
The fluorescent lamp has a glass tube 1 on the inner surface of which a phosphor film 2 is provided. A discharge medium including at least a xenon gas is enclosed in the glass tube. An inner electrode 3 is sealed at least at one end of the glass tube 1 through which a lead terminal 4 is led out. An outer electrode 5 composed of a conductor wire 5a which is wound spirally around the outer surface of the glass tube 1 along almost the entire length. A heat shrinkage resin tube 6 coats the outer surface of the glass tube 1 including the outer electrode 5. The creeping distance along the surface of the glass tube surface between the portion where the lead terminal 4 is led out of the glass tube 1 and an end portion 5b of the conductor wire 5a composing the outer electrode 5 is selected as at least 2 mm.
Abstract:
An electrodeless low-pressure discharge lamp which comprises a discharge vessel, a means for exciting discharge, an UV-to-visible-converting layer and an UV reflecting layer. The discharge vessel encloses a gas-tight discharge cavity containing an ionizable fill. The discharge vessel has a light-transmitting bulb portion and a reentrant tube protruding into the discharge cavity, and the bulb portion and the reentrant tube each exhibit a surface facing to the discharge cavity. The means for exciting discharge is arranged at least partially in the reentrant tube. The UV-to-visible-converting layer is applied only to the surface of the bulb portion, while the UV reflecting layer is applied to the surface of the reentrant tube.
Abstract:
A flat luminescent lamp and a method for manufacturing the same are disclosed, in which light weight and high luminance can be obtained and discharge efficiency can be maximized. The flat luminescent lamp includes first and second substrates each having a plurality of concave and convex portions on an opposing surface, first and second electrodes alternately formed in the convex portions on the first substrate at constant intervals, a dielectric layer formed on the first substrate including the first and second electrodes, and first and second phosphor layers respectively formed on the dielectric layer and the second substrate. The method for manufacturing a flat luminescent lamp having first and second substrates includes etching the second substrate to form a plurality of concave and convex portions on one side, forming first and second electrodes alternately on the first substrate at constant intervals, etching the first substrate at both sides of the first and second electrodes at a predetermined depth to form a plurality of concave portions in the first substrate, forming a dielectric layer formed on the first substrate including the first and second electrodes, forming first and second phosphor layers respectively on the dielectric layer and the second substrate, and attaching the first and second substrates to each other so that the concave portions of the first substrate correspond to the concave portions of the second substrate.
Abstract:
In an excimer radiator, especially an UV radiator with dielectrically impeded discharge, a first electrode is applied in a discharge chamber sealed from the ambient atmosphere onto an elongated support which, as seen in a radial direction from its longitudinal axis, is surrounded by a discharge vessel of quartz defining the discharge chamber; on the outside of the discharge vessel a second electrode is disposed which is permeable to at least a portion of the radiation produced in the discharge chamber. In order to maintain sufficient stability in the incandescent processes necessary in the manufacture of the radiator in spite of the elongated internal electrode, one end of the support (8) of the first electrode is placed and affixed in a hollow body-like section (5) tapering as seen in longitudinal section, while the other end of the support (8) is connected to a base (11) which has at least one current lead-through (16) for the first electrode (9).
Abstract:
A plasma pinch having an inner/outer coaxial tube arrangement, which nested tube arrangement yields a higher-performance pinchlamp than is capable with a single-tube configuration. Further, each tube contains a separate gas, the inner tube filled with Argon, and the outer tube filled with Helium. The inner/outer coaxial tube arrangement of the present invention facilitates the use of an inner tube to contain a volume of Argon gas as the working gas. The outer tube is coaxial with the inner tube, surrounding the inner tube with contained Helium gas. The configuration of an outer tube filled with Helium presents external pressures to the inner tube. The contained Helium gas in the outer tube, among other things, compresses and supports the walls of the inner tube, enabling the inner tube to be smaller in diameter than prior art plasma chambers, which chambers would shatter if made with as small a diameter as the present inner tube.
Abstract:
A flat fluorescent lamp is provided with one or more protrusions at the periphery thereof, which protrusion(s) extends outwardly beyond the edges of the two glass plates. A lamp holder receives the protrusion of the flat fluorescent lamp so as to hold the same in a manner that no edges of the two parallel glass plates touch or come into contact with the lamp holder.
Abstract:
A fluorescent lamp (1) includes a tubular glass bulb (2), an internal electrode (5) within the tubular glass bulb (2), a fluorescent layer (4) formed on an inner surface of the glass bulb (2), an external electrode (3) provided on an outer surface of the glass bulb (2), and a covering glass tube (6) is disposed over the total length of the internal electrode (5). The fluorescent lamp (1) further includes a fluorescent layer (7) disposed on the outer surface of the glass tube (6). The fluorescent lamp (1), as configured above, makes it unnecessary to form the internal electrode into a coil, and absorbs the difference in thermal expansion coefficients. This prevents the internal electrode (5) from resonating with vibrations from the outside and prevents contact of the fluorescent layer (4) by the internal electrode (5).
Abstract:
An electrodeless discharge lamp has a thinner wall portion located proximate a position of high applied power. Since the heat capacity of the thinner wall portion is smaller then the remainder of the bulb wall, the thinner wall portion cools faster when the lamp power is turned off, and the condensable part of the fill tends to condense at this bulb wall portion. When the power is turned on again, since the thinner wall portion is located at a position of high power application, the fill is available in such region to be evaporated, thereby resulting in more rapid starting.
Abstract:
A starting aid for an electrodeless high intensity discharge (HID) lamp comprises at least one starting electrode which, at least during lamp starting, is situated adjacent to, and preferably in contact with, the portion of the arc tube nearest the arc discharge and oriented so as to provide a capacitive starting current that flows in substantially the same location as the arc discharge, thereby easing the transition from a relatively low current glow discharge to a relatively high current, high intensity discharge. The starting aid comprises one or more conductors that substantially conform to the shape of the arc tube at least during initiation of the arc discharge. After the lamp is started, the starting aid may be moved to a predetermined location away from the arc tube. Alternatively, the starting aid may comprise one or more fixed starting electrodes. The starting aid may be coupled to the lamp ballast circuit used to drive the excitation coil either directly, or via an impedance network, or via the excitation coil. In an alternative embodiment, the starting aid is excited by a starting circuit that is separate and independent from, and operates at a substantially higher frequency than, the lamp ballast.