CN105044817A - Light guide plate, liquid crystal module group, and liquid crystal television - Google Patents
Light guide plate, liquid crystal module group, and liquid crystal television Download PDFInfo
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- CN105044817A CN105044817A CN201510509995.9A CN201510509995A CN105044817A CN 105044817 A CN105044817 A CN 105044817A CN 201510509995 A CN201510509995 A CN 201510509995A CN 105044817 A CN105044817 A CN 105044817A
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- light guide
- guide plate
- liquid crystal
- thickness
- traditional
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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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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- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a light guide plate, a liquid crystal module group, and a liquid crystal television. The light guide plate is made of an inorganic optical glass material processed by toughening treatment; and a silver-plated layer is formed on the back of the light guide plate by silver plating processing or a reflecting coating layer is coated on the back of the light guide plate. According to the invention, the traditional back panel, the light guide plate, and reflector plate functions are integrated into one; and thus the traditional back panel and reflector plate can be saved and only one light guide plate is used for realizing the functions of the back panel, the light guide plate, and reflector plate. Therefore, problems of lots of parts and complex structure of the traditional module group during the assembling process can be solved completely; and the traditional television structure is changed completely and the thin type of the product can be realized easily.
Description
Technical field
The present invention relates to field of liquid crystal display, particularly relate to a kind of light guide plate, liquid crystal module and LCD TV.
Background technology
Mainly contain liquid crystal module, circuit board and shell in traditional liquid crystal TV to form, wherein the critical part of liquid crystal module is that front frame, liquid-crystalline glasses, blooming piece, light guide plate, light source, heat sink strip, reflector plate and backboard are formed.The light that its effect of reflector plate wherein mainly prevents light source from sending exposes from the back side of liquid crystal module, and can concentrate towards front projection, light source reflection to improve the efficiency of light energy utilization.Its Main Function of backboard is that TV part provides support, and is generally aluminium sheet or steel plate.Its Main Function of light guide plate is penetrated from light guide plate front by the light inciding light guide plate.But there is many deficiencies in current liquid crystal module: complex structure, and part is many, and screw is many.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of light guide plate, liquid crystal module and LCD TV, be intended to solve existing liquid crystal display module structure complicated, part is many, the problem that screw is many.
Technical scheme of the present invention is as follows:
A kind of light guide plate, it is characterized in that, the material of described light guide plate is the inorganic optical glass through tempering process, and the backsize of described light guide plate has reflective coating layer.
Described light guide plate, is characterized in that, the thickness of described light guide plate is 2 ~ 4mm.
Described light guide plate, is characterized in that, the thickness of described reflective coating layer is 8-12 μm.
Described light guide plate, is characterized in that, described reflective coating layer is the silver coating that silver-plated process is formed, and its thickness is 0.1 ~ 0.3mm.
Described light guide plate, is characterized in that, the optics site of described light guide plate is distributed in the front of light guide plate.
Described light guide plate, is characterized in that, described optics site uses radium-shine to get ready or wire mark mode of printing is made.
Described light guide plate, is characterized in that, the ink adopted when adopting wire mark mode of printing to make optics site is the coating containing silicon dioxide and titanium dioxide, and the roasting procedure of wire mark printing adopts the condition of 120 ~ 150 DEG C and 30 ~ 40min.
A kind of liquid crystal module, it is characterized in that, comprise liquid-crystalline glasses, blooming piece, center, light guide plate and heat sink strip, described light guide plate is light guide plate as above.
Described liquid crystal module, is characterized in that, described light guide plate connects heat sink strip, center and liquid-crystalline glasses by the mode that glue is bonding.
A kind of LCD TV, it is characterized in that, described LCD TV comprises liquid crystal module as above.
Beneficial effect: traditional backboard, light guide plate, reflector plate function i ntegration are integrated by the present invention, namely traditional backboard is saved, reflector plate and backboard, only adopt one piece of light guide plate can realize three's function, so thoroughly solve traditional module, number of parts is many in an assembling process, baroque problem, has also overturned traditional tv structure, and be more easy to do slimming.
Accompanying drawing explanation
Fig. 1 is the decomposition texture schematic diagram of LCD TV in the present invention.
Embodiment
The invention provides a kind of light guide plate, liquid crystal module and LCD TV, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of light guide plate provided by the present invention, its material is the inorganic optical glass through tempering process, and the backsize of described light guide plate has reflective coating layer.
Light guide plate of the present invention, replaces the backboard in former traditional backlight module, reflector plate and traditional PMMA/MS light guide plate, by the function i ntegration of three in one, namely in light guide plate of the present invention.
For guaranteeing that light guide plate of the present invention has the optical property of the PMMA/MS light guide plate used in traditional tv, the light guide plate in the present invention adopts inorganic optical glass.And there is in order to ensure light guide plate of the present invention optical property and the effect of the reflector plate used in traditional tv, light guide plate of the present invention adopts in inorganic optical glass back, processing highly reflective material, be coated with reflective coating layer (thickness is preferably 8-12 μm), thus make reflectivity up to 99-100%, higher than the reflector plate used in traditional tv, described reflective coating layer also can be the silver coating (thickness is preferably 0.1 ~ 0.3mm) that silver-plated process is formed, the thickness of silver coating is higher, its reflectivity is also higher, but during to certain thickness, the raising of its reflectivity is also not obvious, and it is dry that silver coating can be caused to be difficult to, processing time is longer, so the thickness of silver coating considers preferably 0.1 ~ 0.3mm in the present invention, under this thickness condition, can guarantee that silver coating has enough reflectivity, the function of reflector plate can be substituted, raising make efficiency can be made again simultaneously.
The present invention also eliminates the metal backing of traditional tv module, so TV can be made to become lighter.Also solve the problem of current liquid crystal display module structure complexity.Simultaneously owing to eliminating the metal backing of traditional tv module in the present invention; relevant TV part is all fixed in light guide plate; particularly; as circuit board, mainboard, heat sink strip, PCB protective cover, diaphragm fixed cover are fixed on a back cover fixed head, then the mode (by screw locked easily smash light guide plate) of this back cover fixed head by bonding is fitted in light guide plate.Because glass has frangible, so the reliability in order to ensure TV, the matrix of light guide plate and inorganic optical glass through tempering process, are obtained optics tempered glass, can improve its rigidity like this by the present invention.Because the thickness of light guide plate is larger, then rigidity is higher, and thickness is larger, corresponding cost is also higher, integrated cost factor and rigid demand, and the present invention preferably adopts the light guide plate that 2 ~ 4mm is thick, it can ensure preferably rigidity, can reduce costs again, more preferably 2.5mm, under this condition, light guide plate has enough firm need, non-friable, improves the reliability of TV, the thickness of TV module can be reduced again simultaneously, and reduce costs.
Described inorganic optical glass first wants polishing to cut, and due to unorganic glass sharp edges, needs to carry out edging process when cutting.Carrying out cutting and after edging process, can clean unorganic glass, then tear the diaphragm at the unorganic glass back side off, there is at unorganic glass backsize the UV coating of highly reflective; By mass percentage, composition mainly 40 ~ 70% resins, 10 ~ 40% nanometers guide-lighting powder, 10 ~ 20%UV solvent of UV coating, surplus is auxiliary agent, as 50% resin, the guide-lighting powder of 30% nanometer, 15%UV solvent, all the other are auxiliary agent, resin wherein can be epoxy acrylate, polyurethane acroleic acid fat, polyester acrylate, acrylate resin etc., which determines the hardness, pliability, adhesion, optical property etc. of the rear product of solidification; The guide-lighting powder of nanometer can be diphenylethan, aroyl phosphine oxide, benzophenone or 2-hydroxy-2-methyl-1-phenylacetone etc., plays and absorbs UV energy, the effect of initiated polymerization; UV solvent plays adjustment dope viscosity, and participates in curing reaction, affects the effect of coating performance; Auxiliary agent comprises levelling agent, defoamer, surfactant etc.Certainly, this UV coating can also select silver, namely silver-plated at the unorganic glass back side, can realize reflex equally.
The thickness of UV coating can be specifically 8-12 μm, in this thickness range, can obtain higher reflectivity, when thickness is excessive, the contribution of UV coating to light guide plate emitting brightness is less, and waste coating, be unfavorable for cost-saving, thickness is too small, is difficult to obtain higher reflectivity.As the preferred implementation of one of the present invention, UV paint thickness is preferably 9 μm, and now the reflectivity of UV coating is higher, and the emitting brightness of light guide plate is higher.As shown in table 1 below, which show the mean flow rate measurement data of four kinds of 32 cun of light guide plate.
Table 1
According to the measurement data display shown in table 1, when the thickness of UV coating is 9 μm, the mean flow rate of light guide plate reaches 326.70 nits, higher than other schemes.Compared with the light guide plate of conventional belt reflector plate, not only reflectivity is higher, and thickness is also thinner.Above-mentioned mean flow rate chooses the 441(21*21 of module) average brightness put, the thickness of UV coating also refers to average thickness.
In addition, the coating method of UV coating can be printing coating or spraying coating, adopts the mode of printing coating, need control the following parameter in printing process: dispensing area and screen mesh printing plate die thickness; Wherein, dispensing area is relevant with module frame, and the edge of dispensing area and unorganic glass has a segment distance, and this distance should be less than 0.5 ~ 2mm, avoid coatings to other regions of light guide plate, dispensing area and light guide plate with the use of liquid-crystalline glasses between distance should be greater than 1 ~ 2mm.Thickness due to UV coating is preferably 9 μm, and screen mesh printing plate die thickness is preferably 10 μm, this is because can be slightly residual during coating infiltration silk screen grenadine, so slightly thicker than UV coating.
Adopt the mode of spraying coating, the following parameter in printing process need be controlled: dispensing area and paint thickness; Wherein, similar with aforementioned manner, the edge of dispensing area and unorganic glass has a segment distance, and this distance should be less than 0.5 ~ 2mm, avoid coatings to other regions of light guide plate, dispensing area and light guide plate with the use of liquid-crystalline glasses between distance should be greater than 1 ~ 2mm.Should by adjustment spraying rate, unit interval spraying mouth output, the UV paint thickness controlling spraying is in 8-12 μm, is preferably 9 μm.
In the present invention, adopt the mode of whole even spread during coating UV coating, object is the function in order to have reflector plate concurrently, to replace reflector plate; Traditional UV coating is the mode of coating site, and object destroys the total reflection process of light in light guide plate, obtains uniform area source.The present invention then adopts the mode of whole even spread, ensure that the whole back side has the reflecting properties of traditional reflector plate.
The unorganic glass of coated UV coating is put into UV curing oven, is cured and forms the unorganic glass that the back side has reflective coating layer;
In the specific implementation, because UV coating of the present invention is for unorganic glass, so its condition of cure is different from traditional condition of cure, solidification energy is at 800 ~ 1200mJ/cm
2, in order to accurately adjust baking energy, specifically by adjusting with under type: 1, the distance of unorganic glass and UV fluorescent tube; 2, baking time (or line speed); 3, UV power of lamp tube;
For the UV fluorescent tube distance of unorganic glass and UV curing oven, control between 100 ~ 300mm, such as a preferred embodiments is 150mm.The distance of unorganic glass and UV curing oven is too small, solidification energy then can be caused too to concentrate on unorganic glass surface, cause solidification too fast, toast uneven, the distance of unorganic glass and UV curing oven is excessive, solidification energy major part then can be caused all to distribute in other positions, make solidification energy loss too much, also affect curing efficiency simultaneously, so the present invention preferably controls between 100 ~ 300mm, such as, in actual application, choose 150mm, can ensure that baking evenly like this, can ensure that again solidification energy can not lose too much, also improve curing efficiency.
For baking time, be preferably 10 ~ 20s, the present invention selects above-mentioned baking time condition, is in order to avoid baking time is too short, such as, when being less than 10s, chemical reaction is incomplete, UV coating and acrylic glue do not bond completely, and baking time is long, such as, be greater than 20s, then UV coating overdrying, UV coating does not play effect.Certain baking time also needs in conjunction with UV power of lamp tube, and such as UV power of lamp tube opens 100%, then baking time controls to open 50% at 10s, UV power of lamp tube, then baking time selects 20s, otherwise likely illumination is not enough.A preferred embodiments is that baking time is about 15s, and line speed is about 2m/min.
UV fluorescent tube is divided into UV-A, and wavelength is 320 ~ 400nm; UV-B, wavelength is 275 ~ 320nm; UV-C, wavelength is that 200 ~ 275nm, UV power of lamp tube is only relevant with fluorescent tube itself with input current, and focus on wavelength chooses, the present invention adopts UV-A fluorescent tube, wavelength chooses 320 ~ 400nm.Wherein UV-B fluorescent tube and UV-C fluorescent tube are mainly used in ultraviolet inspection and medical therapy, the light guide plate of coating UV coating of the present invention is when being cured, adopt UV-A fluorescent tube, namely the fluorescent tube of upper wavelength is selected, it has the fast feature of rate of drying, the UV paint adhesion of baking is good, and rub resistance power performance is also better.
Owing to needing to process highly reflective material at the back side of light guide plate, so optics site is distributed in light guide plate front by the present invention, the processing procedure of optics site can adopt radium-shine getting ready or wire mark mode of printing, due to different from traditional matrix, the ink used in wire mark printing in the present invention is the coating containing silicon dioxide and titanium dioxide, the condition of 120 ~ 150 DEG C and 30 ~ 40min is adopted at the roasting procedure of wire mark printing, it is higher relative to traditional process temperature and the time is longer, this is because matrix is harder, so need the baking process of higher condition.Above-mentioned baking condition is adopted to be to coordinate light guide plate material of the present invention, because the material of light guide plate is the inorganic optical glass through tempering process in the present invention, its matrix hardness is high, needs the baking of higher temperature and longer time, if temperature lower than 120 DEG C or time lower than 30min, then can cause baking not exclusively, printing ink paint does not also reach baking requirement, if but temperature exceed more than 150 DEG C and baking time, then can cause overbaking, printing ink paint overdrying, adhesion declines.
The present invention also provides a kind of liquid crystal module, and it comprises liquid-crystalline glasses, blooming piece, center, light guide plate and heat sink strip, and described light guide plate is light guide plate as above.
Further, described light guide plate connects heat sink strip, center and liquid-crystalline glasses by the mode that glue is bonding.
Center, heat sink strip and liquid-crystalline glasses are directly bonded in light guide plate by the mode that glue is bonding by the present invention, light guide plate front is bonded in by liquid-crystalline glasses and center, heat sink strip (comprising light source) is bonded in the light guide plate back side, thus eliminate operation appended by screw in traditional tv module, save built-up time.
Because the expansion coefficient of inorganic optical glass is very little, very little by the change of temperature humidity body.So the mode using glue bonding, its humiture reliability is very high.
The present invention also provides a kind of LCD TV, and described LCD TV comprises liquid crystal module as above.
The embodiment of LCD TV of the present invention as shown in Figure 1, comprising:
Part 110: liquid-crystalline glasses, for showing television image;
Part 120: blooming piece, for promoting the brightness of TV liquid crystal module;
Part 130: center, for accepting immobile liquid crystal glass, blooming piece and light guide plate are integrated;
Part 140: light guide plate, this light guide plate has had the function of conventional light guiding plate, reflector plate, backboard concurrently, so decrease numerous parts, facilitates assembling, LCD TV can be accomplished more frivolous.Particular content about light guide plate describes in detail existing above, therefore repeats no more.
Part 150: little back cover fixing base, for being bonded in the light guide plate back side, fixing circuit board;
Part 160: light source and heat sink strip, provides light source and heat radiation to liquid crystal module;
Part 170: protective cover on the downside of liquid-crystalline glasses;
Part 180: circuit board protective cover;
Part 190: lower latallae fixed cover;
Part 200: circuit board;
Part 210: complete machine back cover.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (10)
1. a light guide plate, is characterized in that, the material of described light guide plate is the inorganic optical glass through tempering process, and the backsize of described light guide plate has reflective coating layer.
2. light guide plate according to claim 1, is characterized in that, the thickness of described light guide plate is 2 ~ 4mm.
3. light guide plate according to claim 1, is characterized in that, the thickness of described reflective coating layer is 8-12 μm.
4. light guide plate according to claim 1, is characterized in that, described reflective coating layer is the silver coating that silver-plated process is formed, and its thickness is 0.1 ~ 0.3mm.
5. light guide plate according to claim 1, is characterized in that, the optics site of described light guide plate is distributed in the front of light guide plate.
6. light guide plate according to claim 5, is characterized in that, described optics site uses radium-shine to get ready or wire mark mode of printing is made.
7. light guide plate according to claim 6, is characterized in that, the ink adopted when adopting wire mark mode of printing to make optics site is the coating containing silicon dioxide and titanium dioxide, and the roasting procedure of wire mark printing adopts the condition of 120 ~ 150 DEG C and 30 ~ 40min.
8. a liquid crystal module, is characterized in that, comprises liquid-crystalline glasses, blooming piece, center, light guide plate and heat sink strip, and described light guide plate is the light guide plate as described in any one of claim 1 ~ 7.
9. liquid crystal module according to claim 8, is characterized in that, described light guide plate connects heat sink strip, center and liquid-crystalline glasses by the mode that glue is bonding.
10. a LCD TV, is characterized in that, described LCD TV comprises liquid crystal module as claimed in claim 8 or 9.
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| CN105974664A (en) * | 2016-06-21 | 2016-09-28 | 青岛海信电器股份有限公司 | Backlight module, display device and manufacturing method of backlight module |
| CN106054459A (en) * | 2016-08-18 | 2016-10-26 | 深圳创维－Rgb电子有限公司 | Ultrathin backlight module preparing method, ultrathin backlight module preparing device and television |
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| CN109976040A (en) * | 2019-04-11 | 2019-07-05 | 深圳康佳电子科技有限公司 | A kind of reflecting glass backboard, backlight module, display device and intelligent terminal |
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| CN107037529A (en) * | 2017-05-18 | 2017-08-11 | 东莞市银特丰光学玻璃科技有限公司 | A kind of bend glass light guide plate preparation method |
| CN107037529B (en) * | 2017-05-18 | 2019-09-27 | 东莞市银泰丰光学科技有限公司 | A kind of bend glass light guide plate preparation method |
| CN107037531A (en) * | 2017-06-21 | 2017-08-11 | 东莞市银特丰光学玻璃科技有限公司 | It is a kind of to reduce the production method of glass light guide plate aberration |
| CN109976040A (en) * | 2019-04-11 | 2019-07-05 | 深圳康佳电子科技有限公司 | A kind of reflecting glass backboard, backlight module, display device and intelligent terminal |
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| CN105044817B (en) | 2018-06-19 |
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Effective date of registration: 20210706 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co., Ltd Address before: 510530 No.99, Kaida Road, Science City, Guangzhou Economic and Technological Development Zone, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |