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 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 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, 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.

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: In a method of manufacturing a surface light source, a plurality of partition walls is formed on a lower substrate. The partition walls generate a first stress in the lower substrate along a first direction. A reflective layer is formed on the lower substrate. The reflective layer generates a second stress in the lower substrate along a second direction. After forming a fluorescent layer on the reflective layer and beneath an upper substrate, the upper and lower substrates are sealed to form discharge spaces between the upper and lower substrates.