Abstract:
The present invention relates to a metal halogen lamp comprising, inside an outer casing (7), first (3) and second (5) arc tube members, which are electrically parallel-connected and are connected via conductive members (9) to a base part (11), each arc tube member having a first end (15), facing toward the top part (17) of the outer casing (7) opposite the base part (11), and a second end (19), facing toward the base part (11). The first arc tube member (3) is arranged closer to the top part (17) than the second arc tube member (5), and the second end (19) of the first arc tube member (3) and the first end (15) of the second arc tube member (5) adjoin an imaginary plane (P) defined substantially transversely to the center line (CL) of the outer casing (7), which center line extends from the top part (17) to the base part (11).
Abstract:
A high watt type ceramic metal halide lamp illumination device is provided. The device comprises: ballast receiving a primary input voltage and outputting a secondary voltage, and a lamp having a plurality of arc tubes electrically connected in series inside an outer bulb. The lamp is lighted by receiving the secondary voltage output from the ballast. The secondary voltage output from the ballast has a waveform that at least satisfies a maximum-value to effective-value ratio (Vmax/Veff) of greater than 20.5. When using two 360 W arc tubes of a popular type by electrically connecting the two in series instead of a 700 W arc tube of a high-watt type, for example, it is preferable to use a triangular waveform AC voltage that satisfies 260≦Veff(triangular waveform) when expressed by the effective-value, and 500 V≦Vmax(triangular waveform) when expressed by the maximum-value.
Abstract:
A method and a device for artificially generating and showing an aurora and for generating and changing a true-to-life curtain-shaped discharge light emission by using a simple device. In a pressure-reduced chamber, two electrodes are arranged in the X direction and a third electrode is arranged in the Z direction in such a manner that the two electrodes oppose the third electrode and they are apart from each other. A coil generates a magnetic line of force in the Z direction.
Abstract:
The present invention relates to a high pressure sodium lamp comprising an evacuated cover including a base part, an arc tube comprising a first and a second electrode each being connected to the base part via conductor members. At least one conductor member is arranged isolated by a shielding member for preventing, during operation of the high pressure sodium lamp, the photo electronic stream from the at least one conductor member to the arc tube. The lamp comprises a second arc tube.
Abstract:
A dielectric barrier discharge lamp comprises a discharge vessel that has a principal axis, the discharge vessel encloses a discharge volume filled with a discharge gas. The discharge vessel further comprises end portions intersected by the principal axis. There are at least one electrode of a first type and at least one electrode of a second type in the lamp. The electrodes of one type are energized to act as a cathode and the electrodes of other type are energized to act as an anode. The electrodes are substantially straight, elongated and have a longitudinal axis substantially parallel to the principal axis of the discharge vessel. These electrodes are positioned within the discharge volume. The electrodes of at least one type are isolated from the discharge volume by a dielectric layer. A dielectric barrier discharge lamp is also disclosed, in which the electrodes are arranged within the discharge volume in groups, and each of the groups comprises one electrode of the first type and at least one electrode of the second type.
Abstract:
A flat fluorescent lamp is provided. Wherein, a discharge gas is disposed in a chamber, and a fluorescent material is disposed on a first inner wall and a second inner wall of the chamber. First electrode sets are disposed on the first inner wall, and second electrode sets aligned with the first electrodes sets are disposed on the second inner wall. A dielectric layer overlies the electrode sets. Each first electrode set comprises two first electrodes and a second electrode disposed between these first electrodes. Each second electrode set comprises two third electrodes and a fourth electrode disposed between these third electrodes. A first light-emitting area and a second light-emitting area are formed in each pair of the corresponding first and second electrode sets, and the projections of the first and second light-emitting areas on the first inner wall are not overlaid or just partially overlaid.
Abstract:
A method for lighting a flat fluorescent lamp for a large-sized backlight unit is disclosed, to prevent a discharge interference (scattering in fluorescent discharge) when lighting a plurality of groups of cylindrical electrodes being adjacent, in which an A.C. voltage is applied to one or two groups of cylindrical electrodes through introduction wires for lighting lamp in state of being not applied to adjacent one or two groups of cylindrical electrodes, so the plurality of groups of cylindrical electrodes are sequentially switched on and off in a time-division method at a speed not to generate the flicker of lamp.
Abstract:
A multi-tube fluorescent discharge lamp, which is constructed of multiple glass tubes of different caliber in coaxial structure, the both sides of the inner most tube are connected to a cathode respectively, by isolating, perforating and blocking the discharge path, forming a successive discharge path, and coating phosphor on surface of the discharge tubes. The Invention can then have more fluorescent area than a conventional fluorescent lamp of the similar size and higher lumen as well as power transfer factor. Compared with the power consumption of a conventional fluorescent discharge lamp, the Invention therefore has higher luminous flux.
Abstract:
Spherical (23) or cylindrical (27, 36) electrodeless ultraviolet lamps are used to remediate fluid, directly or by excitation of ultraviolet-activated photocatalyst surfaces, which may be on the lamps themselves, or on structures which are permeable by the fluid. The lamps may be excited in cavities (18, 19; 43) by microwave energy from a magnetron (22), or by radio frequency power (39) inductively coupled (40) to the lamps. The lamps (44) may have start-up electrodes (47).
Abstract:
A flat-type fluorescent lamp includes a lamp body having a plurality of discharge spaces emitting a light, first and second external electrodes formed on upper and lower faces of the lamp body, respectively, a conductive clip electrically connecting the first and second external electrodes, and an insulating member covering and insulating the conductive clip. The conductive clip includes a first contact portion contacting the first external electrode, a second contact portion contacting the second external electrode, and a body portion connecting the first and second contact portions. The insulating member includes a recess into which the body portion is inserted. Thus, an electrical defect such as arc discharge between the receiving container and the external conductors may be prevented.