FLAT ELECTRODE, ULTRA THIN SURFACE LIGHT SOURCE DEVICE AND BACKLIGHT UNIT HAVING THE SAME
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.
1 . A flat electrode for a surface light source device, comprising:
a conductive electrode part in a strip-shaped electrode pattern including a plurality of electrode elements on a plane, a pitch between adjoining ones of the electrode elements in the electrode pattern being in a range of 0.5 to 3 mm.
2 . The flat electrode of claim 1 , wherein a pitch of the electrode pattern is in a range of 2 to 3 mm.
3 . The flat electrode of claim 1 , wherein a thickness of the electrode pattern is in a range of 10 to 500 μm.
4 . The flat electrode of claim 1 , wherein the electrode part comprises a first region and a second region which are different from each other in the density of the electrode pattern.
5 . The flat electrode of claim 4 , wherein the first region and the second region are different from each other in the pitch or width of the electrode element in the electrode pattern.
6 . An ultra thin surface light source device comprising:
a first substrate;
a second substrate spaced apart from the first substrate at a predetermined interval;
a first surface electrode part formed on the first substrate, and a second surface electrode part formed on the second substrate; and
a medium layer formed in at least one of spaces between the first substrate and the first surface electrode part and between the second substrate and the second surface electrode part.
7 . The surface light source device of claim 6 , wherein the medium layer is transparent with respect to a visible light.
8 . The surface light source device of claim 6 , wherein a thickness of the medium layer is in a range of 10 μm to 3 mm.
9 . The surface light source device of claim 6 , wherein the medium layer is composed of a polymer of ethylenically unsaturated monomers or a pressure sensitive adhesive.
10 . The surface light source device of claim 6 , wherein at least one spacer is interposed between the first substrate and the second substrate.
11 . The surface light source device of claim 6 , wherein at least one of the first surface electrode part and the second surface electrode part comprises a base layer; an electrode pattern formed on the base layer; and a protection layer formed on the electrode pattern.
12 . An ultra thin surface light source device comprising:
a first substrate;
a second substrate spaced apart from the first substrate at a predetermined interval; and
a first surface electrode part formed on the first substrate, and a second surface electrode part formed on the second substrate,
wherein at least one of the first surface electrode part and the second surface electrode part comprises a base layer, an electrode pattern formed on the base layer, and a protection layer formed on the electrode pattern.
13 . The surface light source device of claim 12 , wherein the base layer and the protection layer are transparent with respect to a visible light.
14 . The surface light source device of claim 12 , wherein the electrode pattern has a regular shape of a circle, an oval or a polygon, a net shape, or a strip shape.
15 . The surface light source device of claim 12 , wherein the electrode in the electrode pattern is composed of one material of copper, silver, gold, aluminum, ITO, nickel, chrome, carbon based conductive substance, conductive polymer, and mixtures thereof.
16 . The surface light source device of claim 12 , wherein at least one of the first surface electrode part and the second surface electrode part has a 60% or more open ratio to expose the first substrate or the second substrate.
17 . The surface light source device of claim 6 or claim 12 , wherein the first substrate and the second substrate form an inner discharge space in a single open structure, and a mercury free discharge gas is injected into the discharge space.
18 . The surface light source device of claim 6 or claim 12 , wherein the first surface electrode part or the second surface electrode part comprises a conductive electrode in a strip-shaped pattern including a plurality of electrode elements on a plane, and a pitch between adjoining ones of the electrode elements in the electrode pattern is in a range of 0.5 to 3 mm.
19 . The surface light source device of claim 18 , wherein a pitch of the electrode pattern is in a range of 2 to 3 mm.
20 . The surface light source device of claim 18 , wherein a thickness of the electrode pattern is in a range of 10 to 500 μm.
21 . The surface light source device of claim 6 , further comprising:
a diffusion layer to be attached to the first substrate or second substrate from which the light is emitted.
22 . The surface light source device of claim 21 , wherein the diffusion layer has a mixed structure in which organic or inorganic diffusion materials are dispersed in a resin matrix.
23 . The surface light source device of claim 6 , further comprising:
a number of protrusions formed in one body with the inner surface of at least one of the first substrate and the second substrate.
24 . The surface light source device of claim 6 , wherein the surface electrode part is a reflective electrode formed of a thin metal tape or a metal deposited layer.
25 . An ultra thin backlight unit comprising:
a surface light source device including a sealed discharge space formed by a first substrate and a second substrate; a first surface electrode part formed on the first substrate, and a second surface electrode part formed on the second substrate; and a medium layer formed in at least one of spaces between the first substrate and the first surface electrode part and between the second substrate and the second surface electrode part;
a case receiving the surface light source device; and
an inverter applying a voltage to the first surface electrode part and the second surface electrode part.
26 . The backlight unit of claim 25 , wherein at least one of the first surface electrode part and the second surface electrode part comprises a base layer, an electrode pattern formed on the base layer, and a protection layer formed on the electrode pattern.
27 . The backlight unit of claim 25 , wherein the first surface electrode part or the second surface electrode part comprises a conductive electrode in a strip-shaped pattern including a plurality of electrode elements on a plane, and a pitch between adjoining ones of the electrode elements in the electrode pattern is in a range of 0.5 to 3 mm.
28 . The surface light source device of claim 12 , further comprising:
a diffusion layer to be attached to the first substrate or second substrate from which the light is emitted.
29 . The surface light source device of or claim 12 , further comprising:
a number of protrusions formed in one body with the inner surface of at least one of the first substrate and the second substrate.
30 . The surface light source device of or claim 12 , wherein the surface electrode part is a reflective electrode formed of a thin metal tape or a metal deposited layer.