Abstract: A surface light source device includes a light source body, first and second electrodes, a light reflecting layer, and a fluorescent layer. The light source body is configured to generate light. The first and second electrodes are each disposed adjacent to a corresponding opposite end portion of the light source body. The first and second electrodes receive a discharge voltage that creates a potential difference across the light source body. The light reflecting layer is disposed at an internal surface of the light source body. The light reflecting layer includes light diffusing particles having at least two sizes. The fluorescent layer is disposed at selected regions of the light source body. Therefore, the light reflecting layer is not deformed by heat and enhances reflectivity without changing a color coordinates.

Abstract: There are provided an yttrium oxide composition having particle size of 25 nm or less, a method of preparing the same and a method of forming an yttrium oxide layer using the same. The yttrium oxide composition is prepared by dissolving an yttrium salt into a solvent to prepare an yttrium salt solution, and adding a basic compound to the yttrium salt solution to adjust a pH value to a range of 3.7 to 7. The yttrium oxide composition can form an yttrium oxide layer having improved properties since the composition has particle size of 25 nm or less and uniform particle distribution.

Abstract: A surface light source device includes a lamp body, a space dividing member, a discharge gas supplying member and a voltage applying part. The lamp body includes a flat shaped space and a fluorescent layer disposed in the flat shaped space to convert an invisible light into a visible light. The space dividing member divides the flat shaped space into a plurality of discharge spaces. The discharge gas supplying member is disposed to pass through the space dividing member and is fixed to the space dividing member, and supplies the discharge spaces with a discharge gas that generates the invisible light. The voltage applying part applies a discharge voltage to the discharge gas. Therefore, the lifetime of the surface light source device generating a planar light is increased, and the luminance of the light becomes uniform so that the display quality of an image is improved.

Abstract: A field emission array which does not contain any organic material is manufactured by separately preparing nanostructures whose one ends were coated and then adhering the coated ends of the nanostructures to a metal electrode layer formed on a substrate.

Abstract: A discharge gas is injected into a plurality of discharge spaces of a surface light source device that has an aspect ratio of about 0.07 to about 0.85. The discharge gas has a pressure of about 10 torr to about 120 torr with respect to a temperature for lighting the discharge gas. The discharge gas includes an inert gas having a neon gas and an argon gas. The argon gas has an amount of about 0% to about 60% by volume with respect to the neon gas. The discharge gas may function as to optimize a light-emitting efficiency of the surface light source device so that the surface light source device may have improved luminance.

Abstract: A surface light source device includes a light source body having a plurality of discharge spaces that are divided into a light-emitting region and a non-light-emitting region. The light-emitting region has a first cross sectional area. The non-light-emitting region has a second cross sectional area larger than the first cross sectional area. An electrode for applying a voltage to a discharge gas, which is injected into the discharge spaces, is provided to a portion of the light source body corresponding to the non-light-emitting region. Thus, a larger amount of the discharge gas may be distributed in the non-light-emitting region than in the light-emitting region. As a result, the electrode may not serve as a dark field. Further, the surface light source device may have a long life span.

Abstract: A surface light source device includes a source body having a plurality of discharge spaces formed along a first direction, and electrodes for generating a dielectric barrier discharge in the discharge spaces formed on both end portions of an outer face of the light source body along a second direction substantially perpendicular to the first direction. The electrodes have capacitances that vary along the second direction. The capacitance for generating a visible ray varies in accordance with a lengthwise direction of the electrode so that the surface light source device may have improved luminance uniformity.

Abstract: A method for treating surface of the phosphor particles, which comprises the steps of dispersing the phosphor particles in a solvent, separately dissolving a precursor of a surface-protecting material in a solvent, and combining the resulting dispersion and solution provides phosphor particles having an evenly coated layer of the surface-protecting material.

Abstract: A surface light source device includes a light source body having a plurality of discharge spaces into which a discharge gas is injected, an external electrode provided on the outer face of the light source body to apply a discharge voltage to the discharge gas so as to generate plasma in the light source body, and a porous internal electrode arranged in the light source body to provide secondary electrons to the plasma, thereby properly maintaining the plasma. The porous internal electrode includes a porous member, and a conductive layer formed on an outer face of the porous member. The secondary electrons are continuously emitted from the porous internal electrode so that an amount of the plasma is steadily maintained.

Abstract: A surface light source device includes a light source body having an internal space into which a discharge gas is injected, and an electrode for applying a voltage to the discharge gas. Partition walls are arranged in the internal space to divide the internal space into a plurality of discharge spaces. To reduce areas of the partition walls, a groove is formed at a side face of each partition wall. Thus, each partition wall has a reduced area so that the partition walls may not act as dark fields of the surface light source device.

Abstract: A surface light source device includes a first substrate, a second substrate and an electrode. The first and second substrate defines a discharge space into which a discharge gas is injected. The electrode applies a voltage to the discharge gas. Any one of the first and second substrates includes a sodalime glass. The sodalime glass includes an ion-exchanging layer containing potassium ions that are ion-exchanged for sodium ions. Since the surface light source device does not have the sodium ions, a discoloring of the surface light source device due to an elution of the sodium ions may be prevented. Further, the sodalime glass may have an enhanced strength.

Abstract: In a surface light source capable of uniformizing a luminance, a body includes a plurality of partition walls, and a gas passage. The partition walls divide an inner space that has a discharge gas into a plurality of discharge spaces that are isolated from each other. The gas passage is formed on each of the partition walls to provide a discharge gas to each of the discharge spaces. The gas passage is formed to be inclined with respect to a lengthwise direction of the discharge space. An electrode that is disposed on the body supplies the discharge voltage to the discharge gas.

Abstract: A surface light source device includes a light source body, first and second electrodes, a light reflecting layer, and a fluorescent layer. The light source body is configured to generate light. The first and second electrodes are each disposed adjacent to a corresponding opposite end portion of the light source body. The first and second electrodes receive a discharge voltage that creates a potential difference across the light source body. The light reflecting layer is disposed at an internal surface of the light source body. The light reflecting layer includes light diffusing particles having at least two sizes. The fluorescent layer is disposed at selected regions of the light source body. Therefore, the light reflecting layer is not deformed by heat and enhances reflectivity without changing a color coordinates.

Abstract: A surface light source device includes a light source body having an inner space into which a discharge gas is injected, and an electrode for applying a voltage to the discharge gas. The light source body includes partition walls dividing the inner space into a plurality of discharge spaces. The partition walls have a width for suppressing formation of a parasite capacitance through which a current flows therein.

Abstract: A surface light source device includes a light source body having discharge spaces into which a discharge gas is injected. The light source body has a protruded portion corresponding to a remaining portion of a tip that is used for exhausting the discharge spaces and injecting a mercury gas into the discharge spaces. An electrode for applying a voltage to the discharge gas is formed on the light source body to cover the protruded portion.

Abstract: A surface light source device includes a lamp body, a space dividing member, a discharge gas supplying member and a voltage applying part. The lamp body includes a flat shaped space and a fluorescent layer disposed in the flat shaped space to convert an invisible light into a visible light. The space dividing member divides the flat shaped space into a plurality of discharge spaces. The discharge gas supplying member is disposed to pass through the space dividing member and is fixed to the space dividing member, and supplies the discharge spaces with a discharge gas that generates the invisible light. The voltage applying part applies a discharge voltage to the discharge gas. Therefore, the lifetime of the surface light source device generating a planar light is increased, and the luminance of the light becomes uniform so that the display quality of an image is improved.

Abstract: A field emission array which does not contain any organic material is manufactured by separately preparing nanostructures whose one ends were coated and then adhering the coated ends of the nanostructures to a metal electrode layer formed on a substrate.