Abstract: There is a provided a surface light source device comprising: a light source body having an inner space therein in which a discharge gas is contained; a plurality of electrodes formed on the light source body in such a manner as to electrically divide the inner space into at least three blocks and applying discharge voltages to the blocks; and a driving unit sequentially applying the discharge voltages to the blocks through the electrodes in synchronization with a video signal of an external display device. The light source body may have a plurality of discharge spaces or a single discharge space therein. In accordance with the present invention, the surface light source device sequentially applies the discharge voltages to the blocks, and thereby can reduce an after-image occurring in a liquid crystal display device.

Abstract: Disclosed is a complex film for a display apparatus, which comprises a base film; an anti-reflection film formed on a first surface of the base film and adapted to prevent reflection of external light; an external light shielding film formed on a second surface opposite to the first surface and including an external light shielding pattern, the external light shielding pattern having a plurality of external light shielding parts formed on a surface of the external light shielding film; and an adhesive film formed on the external light shielding film and including at least one colorant having a selective wavelength absorption capability. The complex film has multi-functionalities such as electromagnetic wave shielding, external light absorption, near infrared ray shielding, color correction, and the like, thereby simplifying an assembly process of the display apparatus, and reducing the thickness of the display apparatus.

Abstract: The surface of a gallium nitride single crystal substrate is processed, e.g., comprising steps by planarizing the top side and the bottom side of a gallium nitride original substrate positioned on a support bed; radiating light having wavelengths ranging from 370 to 800 nanometers (nm) onto the planarized gallium nitride original substrate; measuring transmittance of the gallium nitride original substrate; and confirming whether the transmittance is within the range of 65 to 90%. A gallium nitride single crystal substrate obtained through the method of processing the surface has high transmittance ranging from 65 to 90% measured using light having wavelengths of 370 to 800 nm. The thickness ratio (DLa/DLb) of the damage layers on the both sides of the gallium nitride single crystal substrate can be obtained within the range of 0.99 to 1.01.

Abstract: An external light-shielding layer capable of enhancing a visible light transmittance and a contrast ratio and preventing Moiré fringe and Newton ring phenomena, a display filter including the external light-shielding layer, and a display device including the display filter. The external light-shielding layer includes a transparent resin matrix, and a plurality of light-shielding patterns formed on the transparent resin matrix and spaced apart from each other in a predetermined interval, wherein a bias angle (?) formed between a traveling direction of the light-shielding patterns and the longer side of the matrix is in a range of about 5 to 80 degrees.

Abstract: An external light shielding film including a lens pattern formed on a surface of a base substrate and including a plurality of aspheric lenses, and an external light shielding pattern formed on another surface of the base substrate, and a display filter having the same, are provided. The external light shielding film and the display filter having the same may increase a contrast ratio in a bright room, enhance brightness, and increase a viewing angle.

Abstract: A surface light source includes a plate type light source body having a sealed discharging space formed therein, a plate type electrode unit having a plurality of regions adjacent to at least one major surface of the light source body, and a multiple voltage applying unit operable to apply voltages independently to each of the plurality of regions. In this way, brightness of the surface light source can be controlled independently in each of the plurality of regions and a local dimming for a surface light source can be realized.

Abstract: A method of manufacturing a single crystalline gallium nitride (GaN) thick film by using a hydride gas phase epitaxy (HVPE), more particularly, the method of manufacturing c-plane ({0001}) of a single crystalline GaN thick film by using the HVPE. A GaN film is grown on a substrate by providing a hydrogen chloride (HCl) gas and an ammonia (NH3) gas, thereby obtaining the GaN film on the substrate, and a GaN thick film on the GaN film on the substrate is grown.

Abstract: An apparatus for fabricating a GaN single crystal and a fabrication method for producing GaN single crystal ingot are provided. The apparatus includes: a reactor including a ceiling, a floor and a wall with a predetermined height encompassing an internal space between the ceiling and the floor, wherein the ceiling is opposite to the floor; a quartz vessel on the floor containing Ga metal; a mount installed on the ceiling on which a GaN substrate is mounted, the GaN substrate being opposite to the quartz vessel; a first gas supplying unit supplying the quartz vessel with hydrogen chloride (HCl) gas; a second gas supplying unit supplying the internal space of the reactor with ammonia (NH3) gas; and a heating unit installed in conjunction with the wall of the reactor for heating the internal space, wherein the lower portion of the internal space is heated to a higher temperature than the upper portion.

Abstract: There is provided a substrate for a surface light source device, comprising a first secondary electron emission layer including crystalline magnesium oxide (MgO) powder on a surface of the substrate. There is also provided a surface light source device comprising a first substrate and a second substrate facing each other at a predetermined distance between which a discharge space is formed; and an electrode to apply a discharge voltage to the discharge space, wherein a first secondary electron emission layer including crystalline MgO powder is formed on a surface of at least one of the first substrate and the second substrate. Preferably, the crystalline MgO powder is obtained by grinding an MgO sputtering target.

Abstract: A surface treatment layer containing alkali metal oxide is formed on at least one of substrates to form a body of a surface light source. The surface treatment layer may be formed of oxide by coating at least one of cesium, potassium, rubidium, and compound thereof on the surface of the substrate and by performing heat treatment to the substrate. The surface treatment layer containing alkali metal oxide easily emits secondary electrons and reduces firing voltage of the surface light source. Black start is improved, discharging efficiency is increased, and heat generated during the operation is decreased.

Abstract: An apparatus for fabricating a GaN single crystal and a fabrication method for producing GaN single crystal ingot are provided. The apparatus includes: a reactor including a ceiling, a floor and a wall with a predetermined height encompassing an internal space between the ceiling and the floor, wherein the ceiling is opposite to the floor; a quartz vessel on the floor containing Ga metal; a mount installed on the ceiling on which a GaN substrate is mounted, the GaN substrate being opposite to the quartz vessel; a first gas supplying unit supplying the quartz vessel with hydrogen chloride (HCl) gas; a second gas supplying unit supplying the internal space of the reactor with ammonia (NH3) gas; and a heating unit installed in conjunction with the wall of the reactor for heating the internal space, wherein the lower portion of the internal space is heated to a higher temperature than the upper portion.

Abstract: The present invention relates to a sapphire/gallium nitride laminate, wherein a curvature radius thereof is positioned on the right side of a first curve plotted from the following functional formula (I): Y=Y0+A·e?(x?1)/T??(I) wherein Y is the curvature radius (m) of a sapphire/gallium nitride laminate, X is the thickness (?m) of a gallium nitride film, Y0 is 5.47±0.34, A is 24.13±0.50, and T is 0.56±0.04. The inventive laminate can be advantageously used in the manufacture of a high quality electronic device.

Abstract: A flat panel for a cathode ray tube includes a faceplate portion, a skirt portion and a blend round portion joining the faceplate portion with the skirt portion. A point where an external contour of the faceplate portion meets an external blend round contour of the blend round portion is defined as a first point and a point where an external contour of the skirt portion meets the external blend round contour is defined as a second point. The external blend round contour is formed between an imaginary arc whose end points coincide with the first and second points and a line segment whose end points coincide with the first and second points, or is the line segment. The imaginary arc is smoothly connected to the external contours of the faceplate portion and the skirt portion at the first and the second point.

Abstract: There is provided a flat electrode for a surface light source, in which a conductive electrode is formed in a fine strip-shaped pattern on a plane. The flat electrode may comprise a base layer, an electrode pattern formed on the base layer, and a protection layer formed on the electrode pattern. There is also provided an ultra thin surface light source device which comprises: a first substrate and a second substrate which are spaced apart from each other at a predetermined interval; and a first surface electrode formed on the first substrate, and a second surface electrode formed on the second substrate. The surface light source device may further comprise a medium layer formed in at least one of spaces between the first substrate and the first surface electrode and between the second substrate and the second surface electrode.

Abstract: There is provided a surface light source comprising a plurality of discharge channels, in which each end of the outermost discharge channel is expanded towards a sealing part. At least one of the plurality of discharge channels may include a curved surface part and a flat surface part on a top surface thereof. Both ends of the discharge channel may be formed to be higher than a middle portion thereof, and the discharge channels may be formed to be different in height. Accordingly, the discharge characteristic is improved and bad luminance uniformity is solved by variously changing the shape of the discharge channel forming the discharge space in a surface light source. Furthermore, the present invention solves the problems, such as failure in lighting at low temperature, channeling between adjacent channels, and maintains the quality of molded products.

Abstract: A novel black matrix, a method for preparing the same, and a flat display device and an electromagnetic interference filter to which the black matrix is applied. The black matrix is prepared by exposing a photoactive compound to form a latent pattern of nuclei for crystal growth and treating the latent pattern of nuclei for crystal growth with a metal salt solution to give a metal particle-deposited pattern; forming an electroless Ni-plated layer on the metal particle-deposited pattern; and forming an electroless Cu-plated layer on the electroless Ni-plated layer. Exhibiting improved black tone, which is achieved only by a selective multilayer plating process, without using expensive vacuum sputtering apparatus or a photolithographic process, the black matrix can be applied to various flat display devices. In addition, due to improved electric conductivity, the black matrix can be used in an electromagnetic interference filter, without employing an additional front surface blackening process.

Abstract: An optical filter for a display apparatus in which the thickness is reduced and reliability for an EM radiation emission path is improved is provided. The optical filter for the display apparatus includes: a transparent support substrate being formed with a conductive coating film on one surface of the transparent support substrate; an optical film comprising a transparent base substrate formed in a single layer, an antireflective layer formed on one surface of the base substrate, and an adhesive layer formed on the other surface of the base substrate, in which the optical film is attached onto the conductive coating film to expose a surrounding portion of the conductive coating film by the adhesive layer; and a conductive electrode contacting with an exposed area of the conductive coating film.

Abstract: A glass panel for use in a cathode ray tube includes a face portion for displaying images; a skirt portion extending from a periphery of the face portion backwards; and a blend radius portion for connecting the face portion and the skirt portion. The face portion is provided with an effective screen and a wedge portion positioned near a periphery portion of the effective screen. Compressive stress layers are formed on any regions of an inside and an outside surface of the face portion and the skirt portion, and a maximum compressive stress value ?Fmax of the face portion and a minimum compressive stress value ?Smin of the skirt portion satisfy a relationship of ?Smin/?Fmax<0.5.

Abstract: There is provided a surface light source device, including: a light source body having a first substrate and a second substrate between which a plurality of discharge spaces are formed, a discharge gas being provided into the discharge spaces; a reflecting layer formed on an inner surface of the first substrate; a first adsorption preventing layer formed on the reflecting layer, for preventing the discharge gas from being adsorbed to the reflecting layer; a first fluorescent layer formed on the first adsorption preventing layer; a second fluorescent layer formed on an inner surface of the second substrate; and an electrode applying a discharge voltage to the discharge gas. Accordingly, since the discharge gas is uniformly distributed in the discharge spaces, the surface light source device has improved brightness uniformity.

Abstract: A surface light source device includes a light source body, a partition member, an isolating member and a voltage applying part. The light source body has an internal space into which discharge gas is injected. The partition wall divides the internal space into discharge spaces. The partition wall has a connection hole that connects the discharge spaces with each other. The isolating member is disposed such that the isolating member corresponds to the connection hole. The isolating member seals the connection hole to isolate the discharge spaces from each other. The voltage applying part induces discharge of the discharge gas in the discharge spaces. Thus, current drift is prevented.