Abstract: Provided is a back light unit. The back light unit includes a light guide plate having a light guide pattern part; at least one light emitting unit provided at a sidewall of the light guide plate, and irradiating light to the light guide plate; a keypad positioned over the light guide plate, and comprising a resin layer, a base resin layer, a character opening part having a character shape, a key assembly provided at one side, and a key adherence film provided on an upper surface of the base resin layer; and a printed circuit board comprising a metal dome switch positioned under a lower surface of the light guide plate.

Abstract: A flat fluorescent lamp with discharge uniformity is provided. The lamp includes a first substrate and a second substrate having discharge electrodes; a sidewall corresponding to a frame of any one of the two substrates; and a plurality of serpentine shaped discharge channels defined by the sidewall, first barrier ribs, and second barrier ribs, and having serpentine shaped widths corresponding to horizontal pitches between the left/right sidewall and the first barrier rib and between the first barrier ribs, and having discharge channel widths corresponding to vertical pitches between the second barrier ribs, wherein the serpentine shaped discharge channel is varied in length depending on its position within the flat fluorescent lamp.

Abstract: Provided is a back light unit. The back light unit includes a light guide plate having a light guide pattern part; at least one light emitting unit provided at a sidewall of the light guide plate, and irradiating light to the light guide plate; a keypad positioned over the light guide plate, and comprising a resin layer, a base resin layer, a character opening part having a character shape, a key assembly provided at one side, and a key adherence film provided on an upper surface of the base resin layer; and a printed circuit board comprising a metal dome switch positioned under a lower surface of the light guide plate.

Abstract: The present invention discloses a flat fluorescent lamp which improves discharge efficiency and luminance with an increase of a current density per discharge channel by forming multiple discharge channels of an independent serpentine layout and an exhaust channel and minimizes non-light emitting regions caused from the external electrode. The flat fluorescent lamp comprises: side walls for forming closed spaces between a front substrate and a rear substrate; partitions formed on the rear substrate and for forming multiple discharge channels of an independent serpentine layout; an exhaust channel formed on the rear substrate, connected to the respective discharge channels and used for vacuum exhaustion or discharge gas injection; and discharge electrodes arranged on both opposite ends of the starting and ending points of the multiple discharge channels of an independent serpentine layout and for discharging the discharge channels in parallel.

Abstract: A flat fluorescent lamp has a uniform screen brightness even with a low discharge initiating voltage. A backlight unit using the flat fluorescent lamp is provided. The flat fluorescent lamp includes a front substrate, a back substrate having a continuous serpentine type discharge channel defined by a plurality of partitions extending alternately from both side ends of the back substrate. An inverter and a pair of electrodes provided on one of the front and the back substrates apply power to the electrodes. Each of the electrodes includes discharge electrodes mounted in strip configurations and a plurality of subsidiary electrodes that are mounted to extend perpendicularly from the discharge electrodes and to correspond to positions of the partitions. The plurality of subsidiary electrodes are alternately connected to inner edges of both the discharge electrodes so that neighboring subsidiary electrodes have different polarities.

Abstract: Disclosed is a flat fluorescent lamp, including a back substrate, a front substrate made of a transparent material and mounted on the back substrate through a sealing member disposed therebetween, a plurality of partitions disposed between the back and front substrates to define a discharge channel therebetween, a fluorescent material layer coated along a surface of the discharge channel defined by the partitions, a plurality of electrodes disposed to both the back substrate and the front substrate to cause a dielectric barrier discharge, and a reflective layer to cover the entire back substrate and upper portions of the electrodes disposed to the back substrate.

Abstract: A flat fluorescent lamp with discharge uniformity is provided. The lamp includes a first substrate and a second substrate having discharge electrodes; a sidewall corresponding to a frame of any one of the two substrates; and a plurality of serpentine shaped discharge channels defined by the sidewall, first barrier ribs, and second barrier ribs, and having serpentine shaped widths corresponding to horizontal pitches between the left/right sidewall and the first barrier rib and between the first barrier ribs, and having discharge channel widths corresponding to vertical pitches between the second barrier ribs, wherein the serpentine shaped discharge channel is varied in length depending on its position within the flat fluorescent lamp.

Abstract: Disclosed herein is a back light device for LCDs. The back light device includes an inverter to supply an alternating current or a pulse, a plurality of fluorescent lamps to radiate visible light, a reflection member to reflect the light radiated from the fluorescent lamps, a diffusion member to diffuse the light, and a frame to house the above elements therein. An external electrode is provided at a first end of each of the fluorescent lamps, and an internal electrode is provided at a second end of each of the fluorescent lamps. An extension electrode is provided on an outer surface of the second end of each of the fluorescent lamps to be connected to an associated internal electrode. A holding terminal is provided at each of both ends of each fluorescent lamp to connect the external and extension electrodes to each other. Further, an inverter is provided to operate the fluorescent lamps.

Abstract: The present invention discloses a flat fluorescent lamp having a plurality of meandering discharge channels, especially, a flat fluorescent lamp having an ultra slim thickness by minimizing dark regions generated by cross walls forming a meandering shape. The flat fluorescent lamp includes first and second substrates having external electrodes. The flat fluorescent lamp includes a sidewall formed on any one of the two substrates, curved to correspond to the edges of the two substrates, and bonded to the two substrates, for forming an airtight space for discharge, and cross walls formed on one or more surfaces of the two substrates for forming a plurality of independent meandering discharge channels, the cross walls being comprised of first cross walls curved in a vertical axis for forming the meandering discharge channels, and second cross walls incorporated with the first cross walls or the side wall in a horizontal axis.

Abstract: The present invention discloses a flat fluorescent lamp which can improve discharge efficiency and luminance by increasing a current density per discharge channel by forming a plurality of independent meandering discharge channels on a rear substrate, lowering a discharge initiation voltage by auxiliary electrodes and internal and external discharge electrodes, and minimizing non-luminescent regions by the external electrodes. A sidewall is installed to form an airtight space between front and rear substrates, cross walls for forming a plurality of independent meandering discharge channels are installed on the rear substrate, and discharge electrodes are disposed at both sides of the starting and terminating ends of the plurality of meandering discharge channels, for discharging the meandering discharge channels in parallel.

Abstract: The present invention discloses a flat fluorescent lamp which improves discharge efficiency and luminance with an increase of a current density per discharge channel by forming multiple discharge channels of an independent serpentine layout and an exhaust channel and minimizes non-light emitting regions caused from the external electrode. The flat fluorescent lamp comprises: side walls for forming closed spaces between a front substrate and a rear substrate; partitions formed on the rear substrate and for forming multiple discharge channels of an independent serpentine layout; an exhaust channel formed on the rear substrate, connected to the respective discharge channels and used for vacuum exhaustion or discharge gas injection; and discharge electrodes arranged on both opposite ends of the starting and ending points of the multiple discharge channels of an independent serpentine layout and for discharging the discharge channels in parallel.

Abstract: The object of this invention is to provide a direct-type back light device, capable of maintaining uniform luminance, and reducing manufacturing costs and power consumption, in addition to being easy to assemble and to accomplish thinness. The back light device includes a frame, a diffusion member provided in an upper portion of the frame to diffuse light, a plurality of fluorescent lamps provided under the diffusion member to radiate the light, a reflection member provided under the plurality of fluorescent lamps to reflect the light radiated from the fluorescent lamps, a lamp holder to hold each of the plurality of fluorescent lamps, an inverter to turn on or off the plurality of fluorescent lamps, and a capacitive circuit element and an insulator provided on first and second ends of the fluorescent lamps, respectively, to connect the plurality of the fluorescent lamps to the inverter in parallel with each other.

Abstract: A method for fabricating a plasma display panel includes preparing from front substrates an assembly for forming a display part for displaying an image, and preparing from rear substrates a rear substrate assembly. Only the outer edge of the front and rear substrate assemblies are coated with a first frit. An upper glass for mounting on the top of the front substrate assembly, and a lower glass for mounting on the bottom of the rear substrate assembly. Only the edges of the upper and lower glasses are coated with a second frit glass. An outer edge of the front and rear substrate assemblies are coated with a third frit glass and the upper and lower glasses are sealed to the front and rear substrate assemblies and the front and rear assemblies are sealed together and evacuated. A discharge gas is injected between the front and rear assemblies.

Abstract: Disclosed is a flat fluorescent lamp, including a back substrate, a front substrate made of a transparent material and mounted on the back substrate through a sealing member disposed therebetween, a plurality of partitions disposed between the back and front substrates to define a discharge channel therebetween, a fluorescent material layer coated along a surface of the discharge channel defined by the partitions, a plurality of electrodes disposed to both the back substrate and the front substrate to cause a dielectric barrier discharge, and a reflective layer to cover the entire back substrate and upper portions of the electrodes disposed to the back substrate.

Abstract: An apparatus for manufacturing a surface light source apparatus in which a light guide pattern portion is formed on a light guide panel includes a pattern design system to which data about a pattern to be formed on the light guide pattern is input. A control system is connected to the pattern design system and transmits a position signal matching a coordinate value of each pattern to be formed on the light guide panel. A header moving portion mechanically moves vertically and horizontally according to the position signal received from the control system. A laser system outputs a laser beam according to a pulse signal synchronized with a movement of the header moving portion. A lens portion allows a laser beam output from the laser system to pass the header moving portion and to be focused on a scanning surface of the light guide panel. A warp prevention unit prevents the light guide panel from warping due to a local heating by the laser beam.

Abstract: A plasma display panel and a method for fabricating the same are provided. The plasma display panel includes a plurality of front substrates for forming a display part for displaying an image, a plurality of rear substrates provided to be sealed to corresponding front substrates, a first frit glass with which the outer edge of the front and rear substrates are coated, an upper glass provided on the top of the plurality of front substrates, a lower glass which is provided on the bottom of the plurality of rear substrates and sealed to the upper glass, and a second frit glass with which the edge of the upper and lower glasses is coated.

Abstract: An apparatus for manufacturing a surface light source apparatus in which a light guide pattern portion is formed on a light guide panel includes a pattern design system to which data about a pattern to be formed on the light guide pattern is input. A control system is connected to the pattern design system and transmits a position signal matching a coordinate value of each pattern to be formed on the light guide panel. A header moving portion mechanically moves vertically and horizontally according to the position signal received from the control system. A laser system outputs a laser beam according to a pulse signal synchronized with a movement of the header moving portion. A lens portion allows a laser beam output from the laser system to pass the header moving portion and to be focused on a scanning surface of the light guide panel. A warp prevention unit prevents the light guide panel from warping due to a local heating by the laser beam.

Abstract: A plasma display panel and a method for fabricating the panel. The plasma display panel includes front substrates assembled into a front substrate structure for forming a display part for displaying an image, rear substrates assembled into a rear substrate structure and sealed to the front substrate structure, a first frit glass with which only the outer edge of the front and rear substrate structures are coated, an upper glass on the top of the front substrate structures, a lower glass on the bottom of the rear substrate structures, and a second frit glass with which the edge of the upper and lower glasses are coated, sealing the upper and lower glasses to the front and rear substrate structures.

Abstract: A method and an apparatus for fabricating a plasma display device are disclosed. The method for fabricating a plasma display device includes installing in a heating chamber a plasma display device assembly in which frit glass coats the peripheries of substrates; heating the heating chamber while evacuating the plasma display device assembly and the heating chamber via respective exhaust lines; stopping the evacuation and heating of the heating chamber so the frit glass bonds the substrates, and cooling the heating chamber; filling the heating chamber with a discharge gas to atmospheric pressure when the temperature of the heating chamber reaches a predetermined temperature; and filling the plasma display device assembly with the discharge gas when the temperature of the plasma display device assembly reaches room temperature, and sealing the plasma display device assembly.