CN101090059A - Flat electrode, ultra thin surface light source device and backlight unit having the same - Google Patents
Flat electrode, ultra thin surface light source device and backlight unit having the same Download PDFInfo
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- CN101090059A CN101090059A CNA2007100922305A CN200710092230A CN101090059A CN 101090059 A CN101090059 A CN 101090059A CN A2007100922305 A CNA2007100922305 A CN A2007100922305A CN 200710092230 A CN200710092230 A CN 200710092230A CN 101090059 A CN101090059 A CN 101090059A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/305—Flat vessels or containers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
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.
Description
Technical field
The present invention relates to a kind of plate electrode, a kind of ultra thin surface light source device and a kind of back light unit, each all has described plate electrode described ultra thin surface light source device and back light unit, more particularly, relate to a kind of novel surface light supply apparatus that is applicable to no mercury lamp.
Background technology
Liquid crystal display (LCD) device utilizes the electrical characteristics and the optical characteristics display image of liquid crystal.Because the LCD device is compared with the cathode ray tube (CRT) device, small-sized and very light in weight is so the LCD device is widely used in portable computer, communication products, LCD TV (LCTV) receiver, aerospace industry etc.
The LCD device comprises: the liquid crystal control section is used to control liquid crystal; Backlight is used to liquid crystal that light is provided.The liquid crystal control section comprises: a plurality of pixel electrodes are arranged in first substrate; Single public electrode is arranged in second substrate; Liquid crystal is between pixel electrode and public electrode.The number of pixel electrode is corresponding to resolution, and single public electrode is arranged to relative with pixel electrode.Each pixel electrode is connected to thin-film transistor (TFT), thereby each different pixel voltage is applied in to pixel electrode.The reference voltage of ad eundem is applied in to public electrode.Pixel electrode and public electrode are made of transparent electric conducting material.
The light that provides from backlight passes through pixel electrode, liquid crystal and public electrode successively.The display quality of the image by liquid crystal depends primarily on the brightness and the brightness uniformity of backlight.Usually, when brightness and brightness uniformity were high, display quality improved.
In traditional LCD device, backlight uses the cold-cathode fluorescence lamp (CCFL) or the point-like light-emitting diode (LED) of bar shaped usually.Compare with incandescent lamp, CCFL brightness height, long service life, and caloric value is little.LED power consumption height, but brightness is also high.Yet in CCFL or LED, brightness uniformity is poor.Therefore, in order to increase brightness uniformity, adopt CCFL or LED to need optical component, for example light guide panel (LGP), diffusion member and prismatic lens as the backlight of light source.As a result, size is big, Heavy Weight because of optical component becomes for the LCD device of use CCFL or LED.
Therefore, suggestion is with the backlight of flat florescent lamp (FFL) as the LCD device.
Fig. 1 is the example perspective view that shows typical suface light source device.With reference to Fig. 1, traditional suface light source device 100 comprises light source body 110 and is positioned at electrode 160 on the outer surface of two edges of light source body 110.Light source body 110 comprises to be arranged and first substrate and second substrate spaced apart from each other at predetermined intervals parallel to each other.A plurality of partitioned portions 140 between first substrate and second substrate, thereby the space between first substrate and second substrate is divided into a plurality of discharge channels 120.The containment member (not shown) between the edge of first substrate and second substrate, thereby make discharge channel 120 and external isolation.Discharge gas is injected in the discharge space 150 of each discharge channel inside.
In order to make suface light source device discharge, electrode is applied in first substrate and second substrate any or on two, this electrode is strip or island, thereby the area of each discharge channel is identical.When suface light source device was driven by inverter (inverter), all passages on whole surface discharged equably.
Yet, in traditional light supply apparatus, because the characteristics of luminescence is according to the position of discharge channel and difference, so brightness uniformity is bad.In addition, because the interference between the adjacency channel in described a plurality of discharge channels, passage phenomenon (channeling phenomenon) causes the dark space.
Specifically, in traditional suface light source device, because mercury (Hg) is used as discharge gas, so cause environmental problem.In addition, when under cryogenic conditions, driving traditional surface source of light, need the long period just can make brightness stability.In addition, because mercury is to responsive to temperature, thereby the temperature deviation of surface source of light makes the brightness uniformity deterioration.In addition, for bigger suface light source device, it is to be solved to also have a lot of technical problems to have.
Summary of the invention
Therefore, the present invention is devoted to provide a kind of big suface light source device of area that is suitable for.
Another object of the present invention is to provide a kind of suface light source device and back light unit with high brightness, high brightness uniformity and thin thickness.
Another object of the present invention is to provide a kind of suface light source device that is applicable to no mercury discharge gas.
To describe other purpose of the present invention and characteristic below in detail.
According to an aspect of the present invention, the invention provides a kind of plate electrode that is used for suface light source device, comprising: the conductive electrode part of strip electrode pattern, described electrode pattern comprises a plurality of electrode members in the plane.
Spacing in the electrode member in the electrode pattern between the adjacent electrode member can be in the scope of 0.5mm to 3mm.The spacing of electrode pattern can raise to prevent temperature in the scope of 2mm to 3mm.The thickness of electrode pattern can be in the scope of 10 μ m to 500 μ m.Plate electrode can comprise basic unit, be formed on the electrode pattern in the basic unit and be formed on protective layer on the electrode pattern.
In another aspect of this invention, the invention provides a kind of ultra thin surface light source device, comprising: first substrate; Second substrate separates predetermined space with first substrate; First surface electrode part and second surface electrode part, first surface electrode part branch is formed in first substrate, and second surface electrode part branch is formed in second substrate; Intermediate layer (media layer) is formed in the space and at least one space in the space between second substrate and the second surface electrode part branch between first substrate and the first surface electrode part branch.
The bonding between surface electrode part and the substrate is guaranteed in the intermediate layer, and the interval between first surface electrode part and second surface electrode part are divided is according to the thickness in intermediate layer and controlled, thus the flash-over characteristic of control surface light supply apparatus and thermal characteristics.
According to another exemplary embodiment of the present invention, the invention provides a kind of ultra thin surface light source device, comprising: first substrate; Second substrate separates predetermined space with first substrate; Be formed on the first suprabasil first surface electrode part and be formed on the second suprabasil second surface electrode part.At least one in partly of first surface electrode part and second surface electrode comprise basic unit, be formed on the electrode pattern in the basic unit and be formed on protective layer on the electrode pattern.
First surface electrode part and second surface electrode partly utilize basic unit and protective layer guard electrode pattern, thereby improve the durability of electrode pattern, and substrate and surface electrode part be bonding easily, and form the large-area plate electrode of plate shape or sheet shape easily.
In another aspect of this invention, the invention provides a kind of ultra-thin back light unit, comprise suface light source device, shell and inverter, wherein, suface light source device comprises: the discharge space of the sealing that is formed by first substrate and second substrate; Be formed on the first suprabasil first surface electrode part and be formed on the second suprabasil second surface electrode part; And intermediate layer, be formed in the space and at least one space in the space between second substrate and the second surface electrode part branch between first substrate and the first surface electrode part branch, shell is used for the receiving surface light supply apparatus, and inverter gives making alive for first surface electrode part and second surface electrode part.
At least one comprised basic unit in partly of first surface electrode part and second surface electrode, be formed on the electrode pattern in the basic unit and be formed on protective layer on the electrode pattern.The intermediate layer can be formed in first substrate and the first surface electrode part space and at least one space in second substrate and the second surface electrode part space between dividing between dividing.
Suface light source device and back light unit according to the embodiment of the invention are manufactured into the extremely thin superthin structure of integral thickness.In addition, the seal cavity that is formed by first substrate, second substrate and containment member has formed the internal discharge space of single hatch frame.Mercury-free gas is used as discharge gas and is injected in the discharge space, thereby it is applicable to environment amenable product.Discharge space is not separated part separately, thereby the whole lip-deep light that is transmitted into substrate has good brightness and brightness uniformity.
Description of drawings
To those skilled in the art, by with reference to the accompanying drawings the preferred embodiments of the present invention being described in detail, above and other characteristics of the present invention and advantage will become apparent, wherein:
Fig. 1 is the perspective view that shows the example of typical suface light source device;
Fig. 2 is the perspective view that shows according to the suface light source device of the embodiment of the invention;
Fig. 3 is the end view that shows according to the suface light source device of the embodiment of the invention;
Fig. 4 is the sectional view along the line X-X ' intercepting of Fig. 2;
Fig. 5 is the partial enlarged view of the A part of displayed map 4;
Fig. 6 is the sectional view that shows according to the electrode part of sandwich construction of the present invention;
Fig. 7 to Figure 10 shows the sectional view of manufacturing according to the example of the process of the electrode part of sandwich construction of the present invention;
Figure 11 to Figure 14 is the plane graph that shows according to the various examples of electrode of the present invention electrode pattern partly;
Figure 15 is the partial enlarged view of display electrode pattern;
Figure 16 is the curve chart of the relation between the light characteristic of the spacing of display electrode pattern and electrode pattern;
Figure 17 shows the sectional view of suface light source device according to another embodiment of the present invention;
Figure 18 is the partial enlarged view that shows the B part of Figure 17;
Figure 19 is the plane graph of bipolar electrode pattern according to another embodiment of the present invention;
Figure 20 is the partial enlarged view of P part of example that shows the bipolar electrode pattern of Figure 19;
Figure 21 is the partial enlarged view of P part of another example that shows the bipolar electrode pattern of Figure 19;
Figure 22 is the perspective view according to the diffusing layer that adheres to of the present invention;
Figure 23 shows according to the sectional view that comprises the suface light source device of the diffusing layer that can adhere to of the present invention;
Figure 24 is the partial enlarged view that shows the C part of Figure 11;
Figure 25 is the perspective view according to the substrate of of the present invention and separator one;
Figure 26 is the partial enlarged view that shows the Q part of Figure 25;
Figure 27 shows according to the separator of one of the present invention and the sectional view of substrate;
Figure 28 is the sectional view that shows the suface light source device that comprises the reflector;
Figure 29 is the sectional view that shows the suface light source device that does not comprise the reflector;
Figure 30 is the perspective view that shows the reflector plate electrode;
Figure 31 is the decomposition diagram that shows the back light unit that comprises suface light source device of the present invention.
Embodiment
Below, the present invention is described with reference to the accompanying drawings more all sidedly, wherein, the preferred embodiments of the present invention show in the accompanying drawings.
Fig. 2 is the perspective view that shows according to the suface light source device 200 of the embodiment of the invention, and Fig. 3 is the end view of the suface light source device of displayed map 2.
Suface light source device 200 comprises first substrate 210 of flat shape and second substrate 220 identical with first substrate, 210 shapes.First substrate 210 and second substrate 220 can be made of transparent thin and flat substrate of glass.The thickness of each of first substrate 210 and second substrate 220 is preferably 1mm or littler, but is not limited thereto in the scope of 1mm to 2mm.
Fluorescence coating is applied on each the inner surface of first substrate 210 and second substrate 220.In any one of first substrate and second substrate, can form the reflector.First substrate 210 and second substrate, 220 spaced-apart predetermined spaces, and arrange parallel to each other.Containment member 230, frit for example is inserted between the edge of the edge of first substrate 210 and second substrate 220, thereby forms sealed space.Perhaps, can fuse partly by the edge that makes two substrates and form sealed space.
In suface light source device according to the present invention, large-area plate electrode is formed on the outer surface of the light source body that is formed by first substrate and second substrate.
Fig. 4 is the sectional view along the line X-X ' intercepting of Fig. 2, and Fig. 5 is the partial enlarged view of the A part of displayed map 4.As shown in the figure, first surface electrode part 250 is formed on the outer surface of first substrate 210, and second surface electrode part 260 is formed on the outer surface of second substrate 220.First surface electrode part 250 and second surface electrode part 260 are the surface electrodes of flat shape that cover the entire area of substrate substantially.
In order to increase the optical transmission rate of launch by from light source body discharge, at least one in first surface electrode part 250 and the second surface electrode part 260 can have 60% or above aperture opening ratio (openrate), with the exposure substrate.
Different with the independently discharge space that is divided into by separator in the traditional suface light source device, first substrate 210 and second substrate 220 are planes, and the inside that is limited by first substrate, second substrate and containment member forms the discharge space 240 of single hatch frame.Because it is very little that the interval between first substrate and second substrate is compared with the area of substrate, and the inner space is formed single hatch frame, so vacuumize easily and inject discharge gas.In addition, except mercury, xenon, argon, neon or any other inert gas or its mixture all are suitable for as discharge gas, to constitute suface light source device.
The vertical height of the discharge space 240 between first substrate 210 and second substrate 220 can be determined by separator 235.Interval between the number of separator 235 and the separator 235 can be determined in the unimpeded scope of light characteristic that makes the light of launching from suface light source device.Can artificially increase the characteristic of separator by the molded specific part of going up substrate.
In addition, the height of the discharge space 240 jut (not shown) that also can be formed by the inner surface with first substrate or second substrate limits.
In the suface light source device according to the embodiment of the invention, first surface electrode part 250 and second surface electrode part 260 can be used transparency electrode (for example, tin indium oxide (ITO)), and can use the electrode of predetermined pattern.
Fig. 6 is the sectional view that shows according to the electrode part of the embodiment of the invention.As shown in Figure 6, the electrode part branch of sandwich construction comprise below basic unit 252, the electrode member 256 that forms with the electrode pattern of reservation shape in the basic unit and be formed on basic unit 252 and electrode member 256 on protective layer 254.
When the electrode part only comprises electrode pattern, be difficult to and the substrate of glass bonding, and durability is low.Yet when electrode part was divided the formation sandwich construction, electrode part and substrate bondd easily, and the durability of electrode pattern is guaranteed, and electrode pattern can form different shape.
Fig. 7 to Figure 10 is the example that shows the process of making the electrode part.Prepare the basic unit 252 (as shown in Figure 7) of sheet, the electrode material that is used to form the electrode part of pattern form is applied to (as shown in Figure 8) in the basic unit.Basic unit uses the transparent polymeric material of tolerance thermal shock, and the electrode part can be by the carbon back or the polymer-based material of copper, silver, gold, aluminium, nickel, chromium, high conductivity, and perhaps the mixture of above-mentioned material constitutes.
The electrode material that applies forms the pattern (as shown in Figure 9) of reservation shape, and forms protective layer 254 (as shown in figure 10) in addition on the electrode member 256 of the pattern with reservation shape.Protective layer 254 uses the transparent polymeric material of tolerance thermal shock.
After formation comprises the light source body of first substrate and second substrate, the electrode part of the sandwich construction that forms in a manner described can be attached in first substrate and second substrate.For example, after preparing first planar substrates and second planar substrates, fluorescent material is applied on the inner surface of first substrate and second substrate.Containment member is formed at least one the surface at edge in first substrate and second substrate.First substrate and second substrate bonding, thus the discharge space that seals formed.When the electrode of sandwich construction partly is attached on the outer surface of first substrate of light source body of formation or second substrate, when forming the light source body, do not need deformation process.Therefore, the scope of selecting to be applicable to electrode material partly broadens, and prevents that the impedance of electrode part from increasing.
In the plate electrode part of using in suface light source device according to the present invention, electrode pattern can adopt different shape.For example, electrode pattern can form as Figure 11 and strip shown in Figure 12, perhaps can form as Figure 13 and shown in Figure 14 netted.Second surface electrode part 260 in first surface electrode part 250 that forms in first substrate 210 and formation in second substrate 220 can have variform electrode pattern, thereby changes the flash-over characteristic of suface light source device.
Inventor of the present invention finds, at plate electrode according to the present invention with comprise in the suface light source device of this plate electrode, in the structure of plate electrode pattern, by changing the spacing may command light characteristic and the thermal characteristics of electrode pattern particularly.
In having the plate electrode of patterning, by changing the width or the thickness of electrode member, or spacing, i.e. distance between the adjacent electrode member in the electrode member in the electrode pattern changes the exposure area rate of electrode.
Figure 13 and Figure 14 are the view of demonstration according to the difference of the exposure rate (exposureratio) of the difference of the spacing of electrode pattern.
As shown in figure 13, when the electrode member in the electrode pattern more during crypto set, exposure area reduces relatively, thereby the brightness in the suface light source device reduces.Yet, as shown in figure 14, do not concentrate so and when increasing exposure area, aperture opening ratio increases when the electrode member in the electrode pattern, the essence area (substantial area) of electrode reduces simultaneously, thus the flash-over characteristic of suface light source device inside is influenced.
Inventor of the present invention is determined by experiment, and in electrode pattern as shown in figure 15, the spacing of electrode pattern (p) is more remarkable to the influence of the raising of the performance of suface light source device than the width (w) or the thickness of electrode pattern.
Figure 16 is the curve chart of the relation between the light characteristic of the spacing of display electrode pattern and electrode pattern.
With reference to Figure 16,, has correlation closely between the spacing of discovery electrode pattern and the luminance efficiency as the result of the change of the luminance efficiency (%) of observed suface light source device by the spacing that changes electrode pattern.Along with pitch smaller, aperture opening ratio reduces, thereby brightness reduces.Yet the brightness that increases along with the spacing increase descends after by specific value.This result is because the essence area of electrode reduces along with the increase of the spacing of electrode pattern, so the discharge capacity of suface light source device inside reduces.
Therefore, as can be known, make the brightness of suface light source device remain on predeterminated level or higher level, the suitable interval that for example keeps 80% required luminance efficiency of LCD-TV is greatly in the scope of 0.5mm to 3mm, shown in the curve chart of Figure 16.
Along with the pitch smaller of electrode pattern, more help brightness, but owing to produce the operating characteristic deterioration that too much heat can make suface light source device in the electrode.Inventor of the present invention studies to the spacing of electrode pattern with by the relation between the temperature of electrode generation.The result shows, can determine that when in the scope of spacing at 2mm to 3mm, temperature reduces about 20% relatively.
Therefore, prevent in the overheated suface light source device, make spacing remain in the above-mentioned scope most suitable according to the electrode pattern in the plate electrode of the present invention at needs.
Also determined according to the thickness of the conductive electrode pattern in the plate electrode of suface light source device of the present invention influentially to light characteristic and aperture opening ratio, for this reason, thickness can be in the scope of 10 μ m to 500 μ m.
Figure 17 be show ultra thin surface light source device 200 according to another embodiment of the present invention ' sectional view, Figure 18 is the partial enlarged view that shows the B part of Figure 17.
Different with the foregoing description, ultra thin surface light source device also comprises intermediate layer 270 and the outer surface of light source body and another intermediate layer 270 between the electrode part 260 between the outer surface of light source body and the electrode part 250, wherein, the light source body comprises first substrate 210 and second substrate 220.
Transparent polymeric material can be used in intermediate layer 270, and described transparent polymeric material has the high grade of transparency, especially for visible light, and described transparent polymeric material superior performance aspect anti-mechanical shock, thermal stability and thermal shock.The intermediate layer can be made of the polymer of one or more ethylenically unsaturated monomers, perhaps is made of pressure sensitive adhesive composition.Wherein, described one or more ethylenically unsaturated monomers are from by acrylic acid; methacrylic acid; butyl acrylate; methyl methacrylate; 2-EHA; acrylate; styrene; vinethene (vinyl ether); vinyl (vinyl); vinylidene halide; the N-vinyl pyrrolidone; ethene; C3 or high alpha-olefin; allylamine; saturated monocarboxylic acid; the allyl ester of the acid amides of saturated monocarboxylic acid; propylene; the 1-butylene; the 1-amylene; the 1-hexene; the 1-decene; allylamine; allyl acetate; allyl propionate; the lactic acid allyl ester; the acid amides of allyl acetate; the acid amides of allyl propionate; the acid amides of lactic acid allyl ester; the mixture of these compounds; 1; the 3-butadiene; 1; the 3-pentadiene; 1; the 4-pentadiene; select in the group that cyclopentadiene and hexadiene isomers (isoform) are formed; pressure sensitive adhesive composition comprises the latex system of water and milkization; the latex system of this water and milkization includes the water-soluble protecting colloid that makes this latex system stable of being used to of effect amount; wherein; the molecular weight of described colloid is less than about 75; 000; and described colloid is from by carboxymethyl cellulose and derivative thereof; hydroxyethylcellulose; ethylhydroxyethylcellulose; methylcellulose; methylhydroxypropylcellulose; hydroxypropyl cellulose; polyacrylic acid and alkali metal salt thereof; the ethoxylated starches derivative; sodium and other alkali-metal polyacrylate (ester); water soluble starch glue; gelatin; water-soluble alginate; casein; agar; natural and synthetic rubber (gum); the polyvinyl alcohol of part and whole hydrolysis; polyacrylamide; polyvinylpyrrolidone; polymethyl vinyl ether-maleic anhydride; select in the group that guar gum and derivative thereof are formed, the minimum substitution value of the carboxyl of described carboxymethyl cellulose is about 0.7.
The thickness that the intermediate layer forms and can be formed between first substrate 2 10 and the first surface electrode part 250 or between second substrate 220 and the second surface electrode part 260 in the scope of 10 μ m to 3mm at least.The thickness in intermediate layer is suitably controlled, with the interval between control first surface electrode part 250 and the second surface electrode part 260.For example, as shown in figure 18, between dividing, electrode part can be increased to Ht by the thickness H2 in intermediate layer 270 by first distance H 1 that first substrate 210 and second substrate 220 are determined.As a result, the interval between electrode part is divided is controlled, thereby changes the flash-over characteristic and the efficient of suface light source device.
In addition, because intermediate layer 270 is between between first substrate 210 and the first electrode part 250 and between second substrate 220 and the second electrode part 260, so the adhesion strength between substrate and the electrode part branch increases.Can use the electrode part that only comprises an electrode pattern to assign to replace electrode part according to the sandwich construction of the foregoing description.
In addition, the heat that produces in the control electrode part 250 and 260 effectively of material by changing the intermediate layer and thickness.
The characteristic and the detailed structure that comprise the suface light source device in intermediate layer 270 can further comprise the characteristic of the suface light source device of the electrode part with above-mentioned sandwich construction, so will no longer make an explanation to it.
Figure 19 shows the plane graph of the detailed structure of the bipolar electrode pattern of plate electrode part according to another embodiment of the present invention.For the sake of clarity, will describe first surface electrode part 250, but this also is applicable to second surface electrode part.As shown in the figure, the electrode pattern of electrode part is divided into the first district 250a and the second district 250b.The first district 250a is positioned at the outward flange of electrode part 250, and the second district 250b is positioned at the middle part of electrode part 250.This bipolar electrode pattern creates a difference the characteristics of luminescence according to the position of suface light source device, thereby has improved luminous efficiency, has especially improved near the luminous efficiency in suface light source device edge.Figure 20 is the partial enlarged view that shows the P part of Figure 19.The spacing p1 of adjacent electrode member is respectively less than the line width w2 and the spacing p2 of the electrode pattern among the second district 250b in the line width w1 of the electrode member in the electrode pattern among the first district 250a and the electrode pattern.That is, by differently designing electrode pattern, the density of the electrode member in the electrode pattern (below be called as " electrode density ") is distinguishing in first district and second district.Figure 21 shows differentiated electrode density according to another embodiment of the present invention.In Figure 21, the spacing p1 of the first district 250a is identical with the spacing p2 of the second district 250b.Yet the live width w1 of the first district 250a is different from the live width w2 of the second district 250b.That is, by only making its live width separately have difference to make the electrode density in first district and second district that difference be arranged.In addition, also can there be difference to make electrode density that difference be arranged by the spacing in the electrode pattern that makes each electrode district.
Also comprise diffusing layer according to suface light source device of the present invention,, and improve the overall brightness characteristic with the dark space that reduces to produce inevitably in the suface light source device.In the present invention, the diffusing layer that does not comprise the individual component of conduct as the diffusion member of traditional back light unit.In the present invention, diffusing layer directly is attached to suface light source device, becomes integrated diffusing layer.As shown in figure 22, diffusing layer 300 can have mixed structure, and in this mixed structure, the bead 320 that is made of the organic or inorganic diffuse material is dispersed in the resin bed 310.Resin bed is as the matrix of the bead that is made of the organic or inorganic diffuse material, and the bead that is made of the organic or inorganic diffuse material is evenly dispersed in the resin bed.Consider the luminous efficiency of suface light source device, can optimize the size or the quantity of the bead that constitutes by the organic or inorganic diffuse material.Figure 23 shows the cross section of the suface light source device that becomes one with diffusing layer.In this embodiment, diffusing layer 300 is formed on the top surface of radiative first substrate 210.First surface electrode part 250 is formed on the diffusing layer 300.The brightness uniformity of the bead 320 that constitutes by the organic or inorganic diffuse material in the diffusing layer by promoting to improve suface light source device from the diffusion of light and the scattering of suface light source device emission.Specifically, bead 320 makes the luminous efficiency maximization by the dark space that reduces to produce inevitably.In addition, because do not need other diffusion member, bead 320 has reduced the volume of back light unit.As shown in figure 24, adhesive layer 350 is formed on the basal surface of first surface electrode part 250.Adhesive layer 350 makes firmer with being connected of diffusing layer 300.Pressure sensitive adhesives (PSA) resin can be used as adhesive layer.In the present invention, mixed structure can be applied to the light source body of surface source of light, and in this mixed structure, the diffusing layer that the organic or inorganic diffuse material is dispersed in the resin matrix is attached on the surface of electrode layer.In this case, adhesive layer also can be included on the described surface of electrode layer.The structure of electrode layer can be the aforesaid sandwich construction that comprises basic unit, electrode pattern and protective layer.
Figure 25 is the separator of one according to another embodiment of the present invention and the perspective view of substrate 211.In Figure 25, as a plurality of projections and the substrate 211 formation one of separator.Equally, also can be formed in another substrate relative of describing after a while as the projection 215 of separator with substrate 211.In Figure 26, a plurality of projections 215 that form one with the substrate identical distance w that is separated from each other.According to the difference of suface light source device, projection can be different on shape, number and interval.Because being transmitted in, light arranges that bossed part is hindered, so preferably, the number of projection can be the least possible.Preferably, vacuumize and inject in the scope of discharge gas at the discharge space that does not hinder the his-and-hers watches planar light source device, the interval between the projection can be maximum.Space between two substrates of the discharge space of the definite formation of the thickness t of projection 215 suface light source device, thereby the height of definite discharge space.Height or the thickness that can determine discharge space according to the separator and the substrate self of one of the present invention, thus increase mass productivity and improve flash-over characteristic.In addition, as shown in figure 27, fluorescent material 218 can be coated on the surface of each projection 215 of inside of the separator that is formed on one and substrate 211.
Typically, be used for light source backlight, any one in first substrate and second substrate is as the surface that is transmitted in the light that produces in the discharge space.In another substrate, form by Al
2O
3, TiO
2, BaTiO
3Or the reflector of the mixture of these materials formation, to prevent that light is to external loss.As shown in figure 28, in suface light source device, first substrate 210 is light-emitting areas, and second substrate 220 comprises reflector 219, thereby prevents that the light that produces from passing through second substrate to external loss.Yet the speed of light is understood some external loss by the reflector.Simultaneously, the technology that forms the reflector in substrate has increased makes the cost of suface light source device, and is difficult to select to be used for the suitable material in reflector.According to another embodiment of the present invention, provide additional advantage: plate electrode is formed on the rear surface of substrate, to be used as the reflector.In Figure 29, fluorescent material 218 is applied on the inner surface that does not comprise the reflector of first substrate 210 and second substrate 220.First surface electrode part 250 is formed on the top surface of first substrate 210, another plate electrode 260 different with first surface electrode partial shape ' be formed on the basal surface of second substrate 220.Figure 30 display panel electrode 260 '.Plate electrode 260 ' cover the whole surface of second substrate 220 substantially, and have very low aperture opening ratio, thus the light that prevents to produce in discharge space is by transmission.From different viewpoints, in the suface light source device according to the embodiment of the invention, surface electrode partly is formed on the whole outer surface of first substrate 210, and the reflector is formed on the outer surface of second substrate 220.The suface light source device that does not form the reflector partly is made of first surface electrode part and second surface electrode, and wherein the aperture opening ratio of second surface electrode part significantly is lower than the aperture opening ratio of first surface electrode part.Therefore, suface light source device according to the present invention comprises an outer surface electrode and an outer reflective layer.In this case, the aperture opening ratio of the pattern of outer reflective layer formation can significantly be lower than the aperture opening ratio of opposed outer surface electrode.That is, the aperture opening ratio of the exposure substrate of outer reflective layer can be zero substantially.The material of electrode can use Al, Cu, Ag, Ni, Cr, ITO, carbon back electric conducting material or polymeric material, perhaps these mixtures of material, so that plate electrode 260 ' as the reflector.In order to have conductivity and reflectivity, plate electrode 260 ' can form the strip shape of no leaking area or meticulous film shape.Yet the shape of plate electrode 260 ' can formation rule is as netted, banded, round, ellipse or polygon.For example, the metal strip that is made of Cu, Al etc. can be attached on the rear surface of substrate.In addition, by use known film shaped technology can form reflector plate electrode 260 '.
Figure 31 is the decomposition diagram that shows according to the back light unit that comprises suface light source device 1000 of the embodiment of the invention.As shown in the figure, back light unit 1000 comprises suface light source device 200, upper casing 1100 and lower casing 1200, optical sheet 900 and inverter 1300.Lower casing 1200 is formed by bottom 1210 and a plurality of sidewall sections 1220, and bottom 1210 is used for receiving surface light supply apparatus 200, and 1210 edge extends to form spatial accommodation described a plurality of sidewall sections 1220 from the bottom.Suface light source device 200 is accommodated in the spatial accommodation of lower casing 1200.
Inverter 1300 is positioned on the back of the body surface of lower casing 1200, and produces discharge voltage with drive surfaces light supply apparatus 200.The discharge voltage that produces from inverter 1300 is applied to respectively on the electrode part of suface light source device 200 by first power line 1352 and second source line.Optical sheet 900 can comprise diffusing panel and prismatic lens, and diffusing panel is used to make the light diffusion equably from suface light source device 200 emissions, and prismatic lens is used for the light of diffusion is applied linearity (linearity).Upper casing 1100 is connected to lower casing 1200 and stayed surface light supply apparatus 200 and optical sheet 900.Upper casing 1100 prevents that suface light source device 200 from leaving lower casing 1200.
The upper casing 1100 and the lower casing 1200 that show among Figure 31 are separated from each other, but they also can form single housing.Because the brightness of suface light source device and brightness uniformity height, so can not comprise optical sheet 900 according to back light unit of the present invention.
The invention provides a kind of suface light source device and back light unit of superthin structure.The inside of suface light source device forms the discharge space of a single opening.Mercury-free gas is used as discharge gas and is injected in the discharge space, thereby it is applicable to environment amenable product.In addition, because discharge space is separated part separately, so it is very high to be transmitted into the brightness and the brightness uniformity of whole lip-deep light of substrate.In addition, the adhesion strength between electrode part and the substrate is improved, and mass productivity is also high.
Utilized preferred illustrative embodiment to describe the present invention.Yet, should be appreciated that scope of the present invention is not limited to disclosed embodiment.On the contrary, scope of the present invention is tried hard to be included in various modifications and the replaceability of using current known or following technology and equivalent to carry out in those skilled in the art's the limit of power and is arranged.Therefore, the scope of claim should meet the wideest explanation, thereby comprises all this modification or similar arrangements.
Claims (27)
1, a kind of plate electrode that is used for suface light source device comprises:
The conductive electrode part of strip electrode pattern, described electrode pattern comprises a plurality of electrode members in the plane, the spacing in the electrode member in the electrode pattern between the adjacent electrode member is in the scope of 0.5mm to 3mm.
2, plate electrode as claimed in claim 1, wherein, the spacing of electrode pattern is in the scope of 2mm to 3mm.
3, plate electrode as claimed in claim 1, wherein, the thickness of electrode pattern is in the scope of 10 μ m to 500 μ m.
4, plate electrode as claimed in claim 1, wherein, the electrode part branch comprises first district and second district, first district is different mutually on the density of electrode pattern with second district.
5, plate electrode as claimed in claim 4, wherein, different mutually on the spacing of first district and the electrode member of second district in electrode pattern or the width.
6, a kind of ultra thin surface light source device comprises:
First substrate;
Second substrate separates predetermined space with first substrate;
First surface electrode part and second surface electrode part, first surface electrode part branch is formed in first substrate, and second surface electrode part branch is formed in second substrate;
The intermediate layer is formed in the space and at least one space in the space between second substrate and the second surface electrode part branch between first substrate and the first surface electrode part branch.
7, suface light source device as claimed in claim 6, wherein, the intermediate layer is transparent with respect to visible light.
8, suface light source device as claimed in claim 6, wherein, the thickness in intermediate layer is in the scope of 10 μ m to 3mm.
9, suface light source device as claimed in claim 6, wherein, the intermediate layer is made of ethylenically unsaturated monomers polymer or pressure sensitive adhesives.
10, suface light source device as claimed in claim 6 wherein, is provided with at least one separator between first substrate and second substrate.
11, suface light source device as claimed in claim 6, wherein, at least one in partly of first surface electrode part and second surface electrode comprise basic unit, be formed on the electrode pattern in the basic unit and be formed on protective layer on the electrode pattern.
12, a kind of ultra thin surface light source device comprises:
First substrate;
Second substrate separates predetermined space with first substrate;
Be formed on the first suprabasil first surface electrode part and be formed on the second suprabasil second surface electrode part,
Wherein, at least one in partly of first surface electrode part and second surface electrode comprises basic unit, is formed on the electrode pattern in the basic unit and is formed on protective layer on the electrode pattern.
13, suface light source device as claimed in claim 12, wherein, basic unit and protective layer are transparent with respect to visible light.
14, suface light source device as claimed in claim 12, wherein, electrode pattern has circle, ellipse or polygonal regular shape, netted or strip.
15, suface light source device as claimed in claim 12, wherein, the electrode in the electrode pattern is made of a kind of material in the mixture of copper, silver, gold, aluminium, ITO, nickel, chromium, carbon back conductive materials, conducting polymer and above-mentioned material.
16, suface light source device as claimed in claim 12, wherein, at least one in partly of first surface electrode part and second surface electrode has 60% or higher aperture opening ratio, to expose first substrate or second substrate.
17, as claim 6 or 12 described suface light source devices, wherein, first substrate and second substrate form the internal discharge space of single hatch frame, and no mercury discharge gas is injected in this discharge space.
18, as claim 6 or 12 described suface light source devices, wherein, first surface electrode part or second surface electrode part branch comprise the conductive electrode of bar paten, described bar paten comprises a plurality of electrode members in the plane, and the spacing between the adjacent electrode member in the electrode member in the electrode pattern is at 0.5mm to 3mm.
19, suface light source device as claimed in claim 18, wherein, the spacing of electrode pattern is in the scope of 2mm to 3mm.
20, suface light source device as claimed in claim 18, wherein, the thickness of electrode pattern is in the scope of 10 μ m to 500 μ m.
21, as claim 6 or 12 described suface light source devices, also comprise:
Diffusing layer is attached in its radiative first substrate or second substrate.
22, suface light source device as claimed in claim 21, wherein, diffusing layer has mixed structure, and in this mixed structure, the organic or inorganic diffuse material is dispersed in the resin matrix.
23, as claim 6 or 12 described suface light source devices, also comprise:
A plurality of projections form one with at least one inner surface in first substrate and second substrate.
24, as claim 6 or 12 described suface light source devices, wherein, surface electrode partly is the reflecting electrode that is formed by metal strip or metal deposition layer.
25, a kind of back light unit comprises:
Suface light source device comprises: the discharge space of the sealing that is formed by first substrate and second substrate; Be formed on the first suprabasil first surface electrode part and be formed on the second suprabasil second surface electrode part; And the intermediate layer, be formed in the space and at least one space in the space between second substrate and the second surface electrode part branch between first substrate and the first surface electrode part branch;
Shell, the receiving surface light supply apparatus;
Inverter gives making alive for first surface electrode part and second surface electrode part.
26, back light unit as claimed in claim 25, wherein, at least one in partly of first surface electrode part and second surface electrode comprise basic unit, be formed on the electrode pattern in the basic unit and be formed on protective layer on the electrode pattern.
27, back light unit as claimed in claim 25, wherein, first surface electrode part or second surface electrode part branch comprise the conductive electrode of bar paten, this bar paten comprises a plurality of electrode members in the plane, and the spacing between the adjacent electrode member in the electrode member in the electrode pattern is in the scope of 0.5mm to 3mm.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060052729 | 2006-06-12 | ||
| KR1020060052731 | 2006-06-12 | ||
| KR1020060052732 | 2006-06-12 | ||
| KR1020060052729A KR100848754B1 (en) | 2006-06-12 | 2006-06-12 | Ultra thin surface light source, fabrication method thereof and backlight unit having the same |
| KR1020060052730 | 2006-06-12 | ||
| KR1020060054458 | 2006-06-16 | ||
| KR1020060074331 | 2006-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101090059A true CN101090059A (en) | 2007-12-19 |
Family
ID=38943337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100922305A Pending CN101090059A (en) | 2006-06-12 | 2007-04-02 | Flat electrode, ultra thin surface light source device and backlight unit having the same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100848754B1 (en) |
| CN (1) | CN101090059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570830A (en) * | 2014-10-16 | 2016-05-11 | 苏州璨宇光学有限公司 | Backlight module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102097477B1 (en) * | 2012-10-22 | 2020-04-07 | 삼성디스플레이 주식회사 | Thin glass substrate and flat panel display device having the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2971761B2 (en) * | 1994-11-21 | 1999-11-08 | スタンレー電気株式会社 | Flat fluorescent lamp |
| JP2002150997A (en) | 2000-11-10 | 2002-05-24 | Nippon Sheet Glass Co Ltd | Flat-plate type ultraviolet lamp |
| JP2005085591A (en) | 2003-09-09 | 2005-03-31 | Lecip Corp | Discharge tube |
| JP2006147251A (en) * | 2004-11-17 | 2006-06-08 | Noritake Co Ltd | Flat discharge lamp |
| KR20060105368A (en) * | 2005-04-04 | 2006-10-11 | 삼성전자주식회사 | Light generating unit, method of manufacturing the light generating unit, back light assembly having the light generating unit and display apparatus having the back light assembly |
-
2006
- 2006-06-12 KR KR1020060052729A patent/KR100848754B1/en not_active IP Right Cessation
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2007
- 2007-04-02 CN CNA2007100922305A patent/CN101090059A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570830A (en) * | 2014-10-16 | 2016-05-11 | 苏州璨宇光学有限公司 | Backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070118503A (en) | 2007-12-17 |
| KR100848754B1 (en) | 2008-07-25 |
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Owner name: SAMSUNG CORNING PRECISION GLASS CO., LTD. Free format text: FORMER OWNER: SAMSUNG CORNING CO., LTD. Effective date: 20080606 |
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Open date: 20071219 |