Abstract: A xenon arc searchlight or illumination system incorporates a high frequency/high efficiency electronic circuit that allows lamp ballasting and charging of the system battery to occur over a wide range of external DC power supplies. The tolerance to variations in the system battery voltage as well as external battery voltage are increased by providing logic control of the converter circuit through a programmed logic device. The intensity of the arc lamp is smoothly decreased or increased in a continuous manner from a maximum intensity to a minimum intensity beam. Ignition of the lamp at its minimum illumination levels is thereby permitted. The xenon arc lamp is uniquely oriented within the searchlight with respect to the reflector to provide the most concentrated and convergent field of illumination on which the lamp is capable, namely with the anode of the lamp turned away from the forward beam direction in the reflector.

Abstract: A xenon arc searchlight or illumination system incorporates a high frequency/high efficiency electronic circuit that allows lamp ballasting and charging of the system battery to occur over a wide range of external DC power supplies. The tolerance to variations in the system battery voltage as well as external battery voltage are increased by providing logic control of the converter circuit through a programmed logic device. The intensity of the arc lamp is smoothly decreased or increased in a continuous manner from a maximum intensity to a minimum intensity beam. Ignition of the lamp at its minimum illumination levels is thereby permitted. The xenon arc lamp is uniquely oriented within the searchlight with respect to the reflector to provide the most concentrated and convergent field of illumination on which the lamp is capable, namely with the anode of the lamp turned away from the forward beam direction in the reflector.

Abstract: A portable battery powered high intensity lighting system that produces solar quality illumination at four to six times the efficiency of comparable incandescent lighting systems includes a light head and a power source. The light head contains an HID (high intensity discharge) arc lamp. A sealed enclosure containing a ballast is attached immediately adjacent to the lamp assembly. The ballast enclosure is preferably potted with a thermally conductive epoxy.

Abstract: An apparatus and method for connecting and disconnecting electrical power to an arc tube includes a high intensity discharge arc tube having a body and electrodes extending from the exterior of the body into the interior of the arc tube body. Electrical leads are connected to the exterior ends of the electrodes and have an length that allows distal ends of the leads to be extended a distance away from the arc tube. Connectors at the distal ends of the leads are adapted to connect to electrical power leads. The connectors, the leads, and the connection of the leads to the electrodes of the arc tube all are electrically insulated from human touch. Therefore, electrical power through the arc tube can be connected and disconnected at a location away from the arc tube, without direct exposure of humans to electrically conducting surfaces for safety purposes.

Abstract: A luminaire having a tube-shaped gas discharge lamp (1) contains at least one concavely curved reflector (2) arranged—seen from the region to be illuminated—neighboring the lamp (1), and at least one partially light permeable diffusor (3) arranged—likewise seen from the region to be illuminated—neighboring the lamp (1) but before the reflector (2). The diffusor (3) and the reflector (2) bound next to the lamp (1) at least one light entry surface and run together at their ends away from the lamp (1) such that they enclose at least one light chamber (4), the ratio between the width (a) of a light chamber and the height (b) of a light entry surface being at least 4:1. Further, there may be provided means for the attainment for a uniform light density over the width of the reflector.

Abstract: This portable light source apparatus accommodates a deuterium lamp in a lamp box and, at the same time, in a housing in order for the influence of temperature changes in the outside air to become very small. Namely, the deuterium lamp, which is susceptible to changes in temperature, is enveloped not only by the lamp box but also by the housing, thereby being accommodated in a double shield structure. Further, it has been known that ozone is generated when ultraviolet rays are emitted in the air. Therefore, a light guide tube for extending a light exit opening of the lamp box is provided, so that cooling winds do not traverse the ultraviolet rays. As a result, ozone is restrained from occurring in the part where the ultraviolet rays occur within the housing, whereby the emitted light is appropriately kept from fluctuating due to the occurrence of ozone.

Abstract: Cold cathode fluorescent lamps (CCFLs), associated devices and methods of use, and more specifically, exit signs, traffic signals, informational and other signage and lighting devices utilizing CCFL-type devices are provided with novel connectors, mounting brackets, housings, associated electronics and other accessories to provide new and unique lighting devices and methods of using them, all of which offer significant savings in cost, operating expense, power consumption and retrofit convenience.

Abstract: A luminaire is provided with a reflector, a lamp body, a discharge lamp, an igniter, a lighting circuit including an inverter, and a socket, wherein both of the igniter and lighting circuit are disposed in the socket, the discharge lamp is fixed to the socket, the socket is fixed to the reflector, and the discharge lamp is housed in the reflector, whereby it is enabled to attempt a reduction of constituting parts of the lighting circuit in the luminaire and, in particular, to attempt an improvement in assembling workability of the luminaire.

Abstract: A luminaire assembly (10) using a double-ended, unshielded high intensity discharge (HID) light source (100). In one aspect, the assembly (10) includes a light source mount (22) adapted to manually, without tools, mount and remove the HID light source (100). The light source mount (22) can optionally include structure (106L and R, 134L and R) to automatically position the light source (100) in a desired orientation. In another aspect, the assembly (10) includes a connection (104L and R, 304L and R, 306L and R) adapted to manually, without tools, connect the light source (100) to electrical power, the connection (104L and R, 304L and R, 306L and R) can be configured to have no electrically conducting surfaces directly exposed or accessible to human fingers and can be configured to be positioned relatively away from the light source (100).

Abstract: A lighting fixture includes a socket that operatively receives a light bulb, lamp, or light source. A means for receiving electrical power is provided. A cylindrical capacitor is at least partially secured to the lighting fixture by at least one wire tie via a plurality of holes arranged in a mounting surface of the lighting fixture. Preferably, the cylindrical capacitor includes a rim. The mounting surface includes a retaining tab arranged thereon and a slot formed therein. The retaining tab cooperates with the slot to partially secure at least a portion of the capacitor rim. The secured rim portion further cooperates with the at least one wire tie to operatively secure the capacitor to the mounting surface of the lighting fixture.

Abstract: An apparatus for a portable aircraft landing light system. The system has three modalities that can be controlled manually or remotely. The modalities are visible light, infrared light and FLIR emission. A ballast and battery provide constant power supply to each of the three modalities.

Abstract: An arc lamp suitable for use as a high intensity light source in a projection system is described. A reflector is arranged to reflect the light produced by the arc into a directional light beam, secondary reflection means being arranged to direct part of the reflected beam so as to compensate for regions which are obscured by the electrodes. Means are provided within the light source to dissipate heat generated by the electrodes.

Abstract: A light source is provided that includes a reflector for generating a substantially rectangular beam. The light source may include an arc lamp that includes a magnetic field generation means in the vicinity of the arc for reducing the arc diameter, or a secondary reflection means for avoiding part of the light that is generated from being obscured by the arc lamp electrodes.

Abstract: A luminaire assembly includes a ballast housing, a wiring box mounted on an upper end of the ballast housing, and an optical assembly mounted on a lower end of the ballast housing. The ballast housing preferably includes a pair of identically configured ballast housing members that are integrally formed from sheet metal and folded by hand prior to final assembly of the ballast housing. The wiring box includes bent tabs that pivotally support the ballast housing between operative and inoperative positions to simplify installation of the luminaire assembly at a site. A hook and rotatable connector are provided to support the wiring box from a luminaire support member. An optional spacer box is provided to space the ballast housing from the wiring box as may be required in certain high wattage applications. The optical assembly is supported below the ballast housing by a pair of support arms that depend from the ballast housing and releasably engage with the optical assembly.

Abstract: A light control device and method are provided for receiving an audible signal from an audio speaker and outputting a light control signal, whereby the light control signal controls the illumination of a light source placed near the audio speaker.

Abstract: A luminaire includes a discharge lamp, a lighting device supplying a power for lighting the discharge lamp, and a lamp body for housing the discharge lamp and an igniter for starting the discharge lamp, the lighting device and igniter being provided separately, while the lighting device being disposed in the lamp body, whereby such parts employed in the lighting device as harness or the like to which a high voltage is applied can be shortened in the length to be able to improve the safety.

Abstract: The reflector for a light, which has a high-pressure gas discharge lamp, has an adherent polymeric coating extending over at least a portion of its outer surface. This polymeric coating contains at least one fluoro-polymer. The coating thickness is from 5 &mgr;m to 200 &mgr;m. A method of making the polymeric coating on the outer surface of the reflector includes powder coating the outer surface of the reflector with the at least one fluoro-polymer and subsequently heat after-treating the reflector with the powder coated outer surface. Alternatively the reflector is coated in a dipping or spraying process and then thermally after-treated. The coated reflector can be used in a headlight or an optical device for projecting data.

Abstract: An apparatus is disclosed that provides back light for liquid crystal displays (“LCD”). The apparatus includes an electrodeless lamp disposed in a cabinet for generating light; and a reflector disposed on one side of the electrodeless lamp for directing light from the lamp in the direction of the LCD. The reflector further includes a surface profile that provides a uniform distribution of light intensity into the LCD. The reflector further is adjacent and in near contact with the lamp to provide a minimum depth behind the lamp. An alternate embodiment of the invention includes an IR reflector disposed between the electrodeless lamp and a diffuser, which is located adjacent the LCD screen.

Abstract: An electric lamp/reflector unit has a molded reflector body which has a hollow neck-shaped portion. The electric lamp has a lamp vessel, enclosing a space in which an electric element is arranged. The lamp vessel has a first and a second, opposed end portion and is fixed with its first end portion within the neck-shaped portion. The molded reflector body is made of a temperature shock resistant glass-ceramic material with low coefficient of expansion.

Abstract: A vehicular headlamp in which a light source and an actuator are connected to a power source using the minimum number of parts, lamp body waterproofing and dustproofing are assured, and each connector is firmly secured to the lamp body of the headlamp. The headlamp includes the actuator for operating a light distribution changing device that changes the distribution of light emitted from the light source. A hookup connector which is provided with a connection portion connected to a power side connector provided on a power cord connected to a vehicle power source at one end thereof and a connection portion connected to the light source side connector and the actuator side connector at the other end thereof is mounted in a hole formed in the lamp body. The hookup connector has a flange which covers the periphery of the opening.

Abstract: A vehicle headlamp including a lamp body, a front cover that covers the front of the lamp body, a reflector disposed in the lamp body, a discharge bulb supported by the reflector, a lighting circuit assembly formed by housing a ballast circuit for lighting the discharge bulb and a starting circuit in a casing, and a power feeding connector connected to the lighting circuit assembly by a cord and removably coupled to the connector portion of the discharge bulb. A lighting circuit case that houses the lighting circuit assembly is integrally disposed on the lamp body with a connecting portion in between, the lighting circuit case is provided on the side of the lamp body, and the connecting portion is in a shape of a lateral U in vertical cross-section so as to allow the power feeding connector to pass through.

Abstract: A lighting system for generating pre-determined beam-pattern comprises a reflector body for reflecting the light forwardly thereof, an optical means for receiving and transmitting said reflected light, a discharge lamp and a lamp base. The discharge lamp is positioned between the reflector body and the optical means. The discharge lamp comprises a sealed discharge vessel made of ceramic light-transmitting material and contains an ionizable fill. The discharge lamp has at least one leg, a pair of spaced-apart electrodes within the discharge vessel between which an electric discharge is developed when the lamp is operated. The lamp base provides for supporting and positioning the discharge lamp, and includes contact elements for connecting the discharge lamp to an operating circuit.

Abstract: An electrodeless lighting apparatus using microwave comprises: a waveguide for transmitting microwave generated in a magnetron; a mesh screen coupled to an outlet portion of the waveguide for blocking a leakage of the microwave and passing light; a bulb located in the mesh screen for emitting light by generating plasma by the microwave; and a globe installed on outer area of the mesh screen so that the light generated in the bulb can be radiated to omnidirection, that is, the globe is installed around the bulb instead of a reflector and a light guide which are used in the conventional art, and thereby, a structure of the lighting apparatus can be made simply and an omnidirectional lighting can be performed.

Abstract: A discharge lamp and a headlight for a motor vehicle are proposed. A moving member is provided, which is movable between at least two positions, for switching over between different light distributions. It comprises at least one optically active element, preferably a lens, which generates an image of the gas discharge which is shifted away from the actual location thereof. A switch-over between two different light distributions is made possible by a movement of the moving member between the two positions in the headlight, such that the gas discharge seems to be shifted by the switch-over for a respective region of the reflector, whereby different light distributions are created. Preferably, the moving member is the outer bulb of the discharge lamp, on which two lenses are arranged and which is rotatable about the optical axis.

Abstract: A luminous display device and method of making the same wherein a front member of transparent glass (16) is fused to the rim area (4) of a rear member (1) having a recess (8) therein and protuberances (12) projecting from the base of the recess toward the front member, the protuberances being closely spaced with respect to each other and the front member to provide passages (14) between the protuberances and a light discharge chamber (20) between the front member and the recess. An opening (22) extends through the rear member communicating with the chamber. A tubular member (26) mounted on the rear member communicates with the opening for evacuating the chamber and filling it with ionizable gas. An electrode device (28) is mounted in the tubular member and is operatively connected to a power source (36) for ionizing the gas in the chamber thereby producing light discharge fingers (38,40,42,44) or streaks through the passages providing the desired display of light.

Abstract: A fiber optic illumination system with the output spectrum of the arc lamp modified using filters to reduce the magnitude of the spikes in the spectrum such that the resulting output has the desired chromaticity and color rendering index of white light.

Abstract: A method for converting a higher voltage recessed light fixture such as a fixture having an Edison base to a second lower voltage halogen fixture, and a retrofitted recessed light fixture for providing a halogen bulb light source. The light fixture includes an open-end housing, a higher voltage connection base disposed within the housing, and a transformer with a base connector element complimentary to the connection base and connected into the base. The transformer provides halogen bulb voltage and accepts a halogen bulb. An end enclosure covers the open end of the housing except for an opening there through which exposes the illumination face of the halogen bulb. Connecting the halogen bulb to the transformer and applying electric power through the base results in illumination delivery from the halogen bulb in a modernistically appearing light fixture.

Abstract: A reliable lighting system is proposed for utilizing the advantages of a centralized light system, wherein at least one optical fiber for the transport of at least a portion of the light of the light sources to at least one light emission location is provided, one of the light sources being a high-intensity gas discharge lamp, in particular a xenon lamp, and the other light source being a halogen lamp.

Abstract: A device for soft irradiation comprising a reflector having a cross-section in the shape of a spiral and an electromagnetic radiation source positioned off-axis such that the source is shielded from direct view. A cooling vent and openings provide impingement cooling of the source to allow efficient use of a high intensity radiation source. Cooling of the source may be further improved with the addition of one or more fluid moving devices in flow communication with the reflector. Optical reflectance coatings on the surface of the reflector or transmission filters allow the device to provide radiation output in selective bandwidths. Multiple reflectors may be used in combination to evenly illuminate complex or large surfaces. There are specific utilities to this design with both pulsed and continuous light sources.

Abstract: A modular cove lighting system is formed of tubular fluorescent light fixtures connected together in parallel. The modular system is capable of providing uniform illumination along its length. The modular system advantageously may include straight lamps, curved lamps (including lamps forming 90° angles), and/or hinged lamp fixtures. The system may be constructed with lamps that are illuminated completely from end to end, which can then be lined up end-to-end to create the illusion of one continuous lamp. Through special matching of ballasts and appropriate lamps, the lamps will dim evenly with each other, regardless of the lengths and shapes of the lamps. Each lamp and ballast is completely contained in a casing to form a cove lighting module. Multicolor systems formed of one or more light fixtures are also disclosed. A recessed light fixture is also disclosed.

Abstract: A lighting system comprising a reflector and an arc lamp designed for illuminating a wide area with an even light distribution. The reflector has a cap that is generally parabolic in shape except perhaps at its top where it supports an arc lamp. The arc lamp is preferably a high intensity sodium or mercury vapor lamp with a vertical arc tube mounted so that the lowermost part of the arc tube is positioned to be even with the lowermost edge of the cap. The glass bulb housing the arc tube may extend below the lowermost edge. In an alternative embodiment, the lowermost edge of the cap has an extended portion and a short portion. In this embodiment, the lowermost part of the arc tube is even with the short portion.

Abstract: A method for replacing non-HID landing and taxi lights in an aircraft wing housing that originally was designed to contain the non-HID landing and taxi lights in side-by-side relationship, is accomplished by installing an HID landing light, an HID taxi light and a power control device in the space originally designed to accommodate the non-HID landing and taxi lights. A single ballast provides power to both lamps which each comprise a housing, an HID bulb supported within the housing, a lens for passage of light from the HID bulb out of the housing, a primary reflector surface disposed behind the HID bulb, and a secondary reflector surface disposed in front of the bulb for reflecting light from the bulb back through the bulb for further forward reflection from the primary reflector surface through the lens. The lens may have a lenticular array including a plurality of cylindrical surface elements for spreading the light beam emitted by the lamp.

Abstract: A troffer which can be shipped to the retailer or job site in several pieces and assembled on site. The reflector portion of the troffer is shaped, such that, one reflector can be shipped within another. This allows any number of reflectors to be nested together to increase the packing density for shipping and warehousing. Thus, a dozen troffers can be packaged together in a volume only slightly greater than a. single conventional troffer. The assembly of the troffer is accomplished by merely clipping one or more ballasted-sockets into the troffer's reflector and the inserting lamps into the ballasted-socket. The assembly is then set into the ceiling grid and connected to the power source. If a diffuser or lens is desired, it is merely placed into the ceiling grid prior to the rest of the troffer's reflector.

Abstract: A neon light fixture system that allows for interchanging of various neon light fixtures. The neon light system comprises a neon light bulb for emitting illumination upon applying predetermined voltage, caps affixed to said light member for allowing current to flow through said light member when a predetermined voltage is applied to said cap, a transformer for applying voltage to said caps, said transformer comprising a housing, a transformer disposed in said housing, and one or more receptacles for releasably receiving said caps and causing electrical contact between said transformer and said caps, said receptacles further including holding apparatus for affixing said neon light bulb to said transformer.

Abstract: Luminaires intended to deliver maximal light flux with improved uniformity, the invention provides in certain embodiments a shielding device or flux manager which produces target extinctions by management of flux to precisely pass flux nearby original arc and through a second bounce off the reflector structure to direct that flux back into the beam. A virtual arc is thus produced in proximity to the original arc with the virtual arc acting as a second source. The flux manager acts to reduce glare and “spill” light. Performance optimization is further provided in embodiments using the flux manager through additional use of a multi-faceted reflector insert which re-aims light which would have been incident on portions of the reflector structure and which light is blocked by the flux manager. The improved light distribution of the several embodiments of the invention allow use of the flux management concept in lighting fixtures of varying type.

Abstract: A halogen work light with a spare bulb container integrally attached thereto is disclosed. The spare bulb container includes a tubular body and a support piece that fits inside the closed end of the tubular body and an end piece that friction fits into the open end of the tubular body. The support piece and end piece both include a longitudinal hole for receiving the ends of a spare halogen bulb and holding the bulb in a suspended position inside the tubular body. Both the support pieces are formed of a soft, resilient material, such as rubber.

Abstract: A hand-held flashlight comprising a metal halide arc lamp operating between 8 and 22 watts. The lamp has an arc gap of between 0.7 and 1.4 mm and a color temperature at or above 5000° Kelvin. The lamp contains a fill gas including mercury and indium in percentages to produce a point source of white light capable of penetrating dense smoke and fog. The flashlight includes a reflector containing the arc lamp and providing a collimated beam of high intensity white light. The flashlight includes a circuit for providing a high starting voltage to the lamp and a lower operating voltage after sustaining the lamp. The circuit includes a battery, a ballast, and a microprocessor for monitoring the lamp and the battery. The microprocessor provides a discernible output signal indicative of the lamp on-time and battery voltage. The microprocessor controls the application of the starting voltage from the ballast to the lamp to prevent misstarting of the lamp.

Abstract: An electric lamp includes a light-transmitting lamp vessel which is closed in a gastight manner. An electric element is arranged in the lamp vessel and is connected to current conductors which issue from the lamp vessel to the exterior. A lamp cap is connected to the lamp vessel. The lamp cap has a housing which includes a coupler formed as an integral whole with the housing. The coupler and the housing share an integral, resilient intermediate portion.

Abstract: A headlight for a vehicle for producing a low beam and at least one light beam with a greater distance, the headlight comprising a light source, a reflector, the light source and the reflector together forming a headlight unit, an electrically adjusting device for changing a relative position between the light source and the reflector, a light width adjusting device for turning the headlight insert about an at least approximately horizontally extending axis, and a safety device operative for monitoring at least indirectly an operation of the adjusting device and in the case of an error when the adjusting device operates not in an orderly manner, the safety device reduces an electric power with which the light source is operated and/or reduces a distance of a light beam produced by the headlight unit.

Abstract: A neon cruising lighting system for use with a motor vehicle battery includes a motor vehicle headlight having a reflector, a cutout in the reflector, an inert gas discharge lamp capable of irradiating various light colors, disposed in the cutout, a plug assembly adapted to cooperate with a motor vehicle cigarette lighter power receptacle, a transformer electrically coupled to both the plug assembly and the inert gas discharge lamp, so that the plug assembly conducts electrical power from the battery to the transformer to the inert gas discharge lamp, in order to illuminate the inert gas discharge lamp.

Abstract: A vehicular headlamp in which a light source and an actuator are connected to a power source using the minimum number of parts, lamp body waterproofing and dustproofing are assured, and each connector is firmly secured to the lamp body of the headlamp. The headlamp includes the actuator for operating a light distribution changing device that changes the distribution of light emitted from the light source. A hookup connector which is provided with a connection portion connected to a power side connector provided on a power cord connected to a vehicle power source at one end thereof and a connection portion connected to the light source side connector and the actuator side connector at the other end thereof is mounted in a hole formed in the lamp body. The hookup connector has a flange which covers the periphery of the opening.

Abstract: A light emitting unit of one or more kinds selected from light sources such as, neon lamp, cold cathode fluorescent lamp, electro luminescence (EL), and light emitting diode (LED) accommodated in a protecting enclosure together with a rectifier circuit, is mounted on a rotating body of an automobile such as a wheel or a tire. Power for illumination is supplied from an extra miniature generator installed on the rotating body converting its rotating kinetic energy into electrical energy by means of a specially designed vane, an eccentric swing block, and a bearing disc with associated transmission gear wheel to continuously supply electricity to the light emitting unit. Both sides of the automobile are therefore well illuminated in a dark environment so as to achieve traffic security and contribute to beautiful night scenery.

Abstract: Disclosed is a dielectric barrier excimer lamp which is easy to handle, less expensive and improved in ultraviolet light beam irradiation efficiency to electric power and ultraviolet light beam irradiation efficiency to a work.

Abstract: A method and system of modifying one feature of a high-pressure lamp without significantly affecting the other features, the features including the luminosity, the color rendering index, the color temperature, or the deviation from the black body locus (DUV). An arc discharge is initiated within the arc tube with a ballast imposing an alternating current waveform on the electrodes. In this way, the electrodes change from positive to negative in each cycle of operation. The waveform of each cycle is modified through the ballast to energize one electrode as positive or negative for a longer time than the other electrode, thereby altering the temperature distribution within the arc tube by changing the cold spot and hot spot temperatures in a lamp which has modifiable emission features.

Abstract: A device for receiving a gas discharge lamp of an automotive headlight has a housing (1) in which an igniting apparatus is arranged. This housing (1) also has an insertion opening (2) with recesses (4) at an edge in an outer wall (3) of the housing for receiving a lamp base with radially projecting bayonet lugs (18) on the base, said lugs axially securing the lamp base (17) in the insertion opening (2) when the lamp base is turned into a locked rotational position. A box (9) is also provided on the housing (1) for a feeder plug (11) which provides an electric power supply. With such a device having an integrated igniting apparatus, mechanical locking is provided for the box arranged on the housing to prevent insertion of the feeder plug as long as a bayonet connection of a base of gas discharge lamp is not in the locked rotational position.

Abstract: An operating theater luminaire having at least two discharge lamps, which can be switched on and off, can be started and alternatively can be switched on by means of a starting device, and illuminate an operating area via optical means, in particular at least one reflector. A plurality of, in particular two discharge lamps, equipped with individual starting devices, of different powers are provided, as a result of which the intensity of illumination in the operating area can be varied when switching over from one discharge lamp to another.

Abstract: Headlamp for motor vehicles, which can generate selectively a full light beam and a dipped/fog light beam, including a reflector which is subdivided into an upper reflective area, and a lower reflective area, and has an optical axis, along which there is disposed a single fixed light source consisting of a bulb with a single filament, a lens, which is disposed in a front position and at right-angles relative to the optical axis, and can converge the dipped/fog light beam, intermediate screens which are partially mobile, and can assume selectively a first position, in which they can intercept part of the said full light beam, in order to convert the latter into the said dipped/fog light beam, and a second position, in which the said full beam is not intercepted, and movement means in order to displace the said intermediate screens between the said first and second positions, which means are disposed on the exterior of a casing, which contains the reflector, the light source, the lens and the intermediate scree

Abstract: A liquid crystal display having a liquid crystal display panel for modulating light to form an image and a back light unit having a plurality of lamp tubes without inside electrodes and which are discharged by outside electrodes disposed along an outer surface of the at least one lamp tube, the back light unit being disposed behind the liquid crystal display panel. One outside electrode disposed at one lamp tube is electrically connected with another outside electrode disposed at an another adjacent lamp tube.

Abstract: A reflector for a high pressure discharge lamp device including a metallic component such that when the lamp is damaged the reflector is not broken or when the reflector is broken, spraying of lamp fragments can be effectively prevented. In the reflector for a high pressure discharge lamp device, the glass reflector houses a discharge lamp of the short arc type in which the discharge vessel is filled with greater than or equal to 0.15 mg/mm3 of mercury, the outside surface of the glass reflector is surrounded by a metallic component.

Abstract: A structure that ensures air tightness and waterproof performance of a cord insertion hole in a back cover of a lamp body. The arrangement allows a reduction of man hours for fixing a power supply cord to the back cover. In an implementation, a cylindrical outer wall 702 is provided that surrounds cord insertion holes 704a, 704b through which power supply cords 6a, 6b are inserted for sending current to light source bulbs 1a, 1b. A resin mold portion filled inside the outer wall fixes and integrates the power supply cords 6a, 6b in the cord insertion holes 704a, 704b. The resin mold portion includes a lower mold layer 9a on the side of the cord insertion holes 704a, 704b that adheres well to the back cover 7, and an upper mold layer 9b laminated over the lower mold layer 9a and having good heat resistance properties. The upper mold layer 9b prevents creep in the lower mold layer 9a, and the lower mold layer maintains air tightness and waterproof performance at the cord insertion hole.