Abstract:
In one embodiment, when the current density at the cathode is less than 0.2 mA/mm2, cathode sputtering is avoided or reduced to such an extent that the life time of the CCFL is not significantly adversely affected. In another embodiment, the internal diameter (ID) of the CCFL tube is within the range of 3 to 16 mm. Preferably, the distance between the anode and cathode is within a range of about 200˜1000 times of the internal diameter of the CCFL tube, and the distances between at least one section of the CCFL tube and two adjacent sections of the CCFL tube is less than about 5 times an outside diameter of the CCFL tube. Preferably, the efficiency of the CCFL is not less than about 55 lm/W.
Abstract:
Known mercury-vapor discharge lamps for planar irradiation are provided with a lamp bulb made of quartz glass, which encloses a closed discharge space having a non-linear gas-discharge channel. In order to provide a structurally simple lamp, which also guarantees a highest possible homogeneity of the UV irradiation, even for a small distance to the surface to be treated, the lamp bulb is formed as a quartz-glass chamber defined by straight walls and having bottom, top, and side walls and is divided into sub-chambers by several separating webs made of quartz glass and projecting from the bottom wall to the top wall. These sub-chambers include a front-most sub-chamber and a rear-most sub-chamber and form in series interconnection the non-linear gas-discharge channel. The separating webs extend alternately from one side wall up to close to the opposite side wall, while leaving open a gap connecting adjacent sub-chambers in a fluid-communicating manner. One electrode is allocated to the front-most sub-chamber and the other electrode is allocated to the rear-most sub-chamber.
Abstract:
A lighting device comprises a serpentine shaped CCFL, a driver driving the CCFL, a connector that allows the device to connect to and receive power from conventional power sockets, and a fixture that connects them into a single device. Such device can be used for general lighting purposes and replaces incandescent and other fluorescent lamps in current use without having to change electrical sockets. The fixture mechanically connects the CCFL, the driver and the connector to form an unitary mechanical structure. Preferably an air gap is maintained between the CCFL and the driver.
Abstract:
Methods and apparatus are provided for increasing the life of a fluorescent lamp suitable for use as a backlight in an avionics or other liquid crystal display (LCD). The apparatus includes a channel configured confine a vaporous material that produces an ultra-violet light when electrically excited. A layer of light-emitting material is disposed within at least a portion of the channel is responsive to the ultra-violet light to produce the visible light emitted from the lamp. An electrode assembly that electrically excites the vaporous material includes a first post, a second post, a conductive filament suspended between the first post and the second post and having a tail portion extending therebeyond, and a benign insulating material such as glass frit substantially covering the tail portion to prevent radio frequency (RF) emissions from the tail portion of the filament.
Abstract:
Disclosed herein is a fluorescent lamp apparatus. The fluorescent lamp apparatus includes a main lamp tube emitting light, a subsidiary lamp tube disposed in communication with the main lamp tube, an external electrode provided to the subsidiary lamp tube, a connection terminal contacting the external electrode such that electric power is applied to the external electrode through the connection terminal, and an insulation cap receiving the connection terminal. The fluorescent lamp apparatus includes the external electrode exposed to the outside, so that installation and separation of the fluorescent lamp can be conveniently achieved.
Abstract:
A serpentine tube used in the manufacture of a fluorescent lamp is coated with a reflective or phosphor material. A magnetic material and coating material slurry is placed within one end of a serpentine glass tube. A magnet is placed adjacent the magnetic material and coating material slurry and is moved in a path conforming to the shape of the serpentine tube. The magnet causes the magnetic material and coating material slurry to travel along therewith, coating a portion of the interior surface of the serpentine tube with a reflective, phosphor, or other material. In another embodiment of the invention, abrasive magnetic material is placed within the serpentine lamp for removing a previously coated material resulting in an aperture being formed. The present invention is particularly suited to the manufacture of serpentine fluorescent lamps that are used to illuminate flat panel displays.
Abstract:
A liquid crystal display module includes: a liquid crystal display panel, a surface light-emitting lamp irradiating light to the liquid crystal display panel by a surface light-emission, and a power source supplying an electric power to the surface light-emitting lamp. The surface light-emitting lamp includes a frame having a light-emitting space, a first barrier rib formed partitioning the lamp into light-emitting spaces, electrode pairs, and a second barrier rib defining a light-emitting path for each of the partitioned light-emitting spaces.
Abstract:
Apparatus for assembling substrates of a planar fluorescent lamp including a base mounted movable along a process line, the base having an upper surface for placing a first substrate of the fluorescent lamp, at least one movable board over the base, the movable board being mounted rotatable between a first position and a second position, at least one pair of parallel links each having one end rotatably coupled to the base and the other end rotatably coupled to the movable board for the movable board rotatable from the first position to the second position, a plurality of clamping members mounted on the movable board for holding a second substrate of the fluorescent lamp at a position under the movable board, a stopping member mounted in the process line over a direction of movement of the base, for coming into contact with the movable board to cause rotation of the movable board, and a damping member for making a damping action at a time the first, and second substrates of the fluorescent lamp come into contact with each other as the movable board rotates, downwardly.
Abstract:
A fluorescent lamp includes: a bulb including bent and straight-tube portions having an external tube diameter of 12 to 20 mm and a tube length of 800 to 2500 mm. The straight portions are disposed generally within the same plane through the bent portions. A pair of end portions with electrodes sealed therein form a single discharge path through the straight tube and bent portions. A phosphor layer is formed on the inner face of the bulb, and a discharge medium including mercury is sealed in the bulb. Thermal deterioration of the phosphor layer formed at the straight tube portions is reduced so deterioration of the initial light flux is suppressed, allowing lighting at higher efficiency. With the above configuration, a fluorescent lamp is compact and capable of light with high efficiency, and with improved light output properties. A light fixture uses this fluorescent lamp.