KR20080021707A - Impact resistant, direct contact plasma display panel filters - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to the field of plasma display panel filters, and more particularly, to the field of multiple layer plasma display panel filters that can be effectively installed directly on the windshield surface of a plasma display panel module.

Description

Impact Resistance, Direct Contact Plasma Display Panel Filters {IMPACT RESISTANT, DIRECT CONTACT PLASMA DISPLAY PANEL FILTERS}

TECHNICAL FIELD The present invention relates to the field of plasma display panel filters, and more particularly, to the field of multiple layer plasma display panel filters that can be effectively installed directly on the windshield surface of a plasma display panel module.

Plasma display panels (PDPs) for televisions and other applications create images by chemically reacting with coated phosphorous layers to release a gas plasma that produces light with desirable properties. Compared to the conventional cathode ray tube, the plasma display panel can have excellent display capability, luminance and contrast. In the plasma display panel, the use of the voltage between the electrodes is to discharge the gas plasma and consequently to emit ultraviolet rays. Ultraviolet emission excites adjacent phosphors, resulting in electromagnetic emission of visible light.

The plasma display panel emits electromagnetic radiation with different emission spectra that need to be modulated to see. Optical filters have been used for this purpose. The optical filter may include, for example, a transparent substrate, an antireflective layer on the front surface of the transparent substrate to prevent ambient light reflection, and an electromagnetic shielding film on the back surface of the transparent substrate.

Many conventional plasma display panel filters employing a composite polymeric layer are manufactured for use as a filter located on the viewer side of a plasma display panel module with a space between the filter and the module. This positioning introduces some inconvenience behind the filter, including unnecessary reflections that may require additional antireflective layers and an additional glass layer that increases the overall weight of the unit.

In the field, what is needed is a plasma display panel filter with a simple and safe multilayer design that can be used in direct contact with a plasma display panel module as compared to conventional plasma display panel filters.

Summary of the Invention

The present invention provides a plasma display panel filter that can be disposed directly on a plasma display panel module and includes at least one impact resistant viscoelastic polymer sheet disposed between two polymer film layers. The present invention also includes a plasma display panel device using the plasma display panel filter of the present invention, a plasma panel filter and a method of manufacturing the device, and a method of filtering plasma display panel heat radiation.

The present invention provides a plasma display panel filter that can be disposed directly on the front of the plasma display panel module. Both of these positioning reduce the image likely to be reflected behind the filter, which can delay viewing and eliminate the need for additional glass filters to be installed on the substrate, thereby reducing the overall weight of the plasma display panel. Decreases. Of course, the plasma display panel filter disclosed herein may be used in place of a conventional filter installed on a glass substrate that is not physically disposed opposite the plasma display panel module.

As used herein, a plasma display panel module is a unit in which gas plasma emission occurs, and a plasma display panel module generally includes a phosphor layer, a cell structure, and a gas plasma disposed between two sheets of glass. .

As shown in FIG. 1, a partial cross-sectional view of a plasma display panel filter, generally at 10, wherein a polymer sheet stack 14 is disposed between the first polymer film 12 and the second polymer film 16. Is placed on. The polymer sheet stack 14 consists of a single or one or more polymer sheets. The polymer sheet of the present invention, which will be described in detail below, may include all suitable, impact-resistant polymers, many of which are polymerized sheets of poly (vinyl butyral), polyurethane or ethylene vinyl acetate. acetate). The polymer sheet of the present invention may also contain various agents and in particular an infrared absorbing agent. The polymer film of the present invention, which will be described in detail below, may include all suitable performance film-type polymers, and many specific polymer films are poly (ethylene terephthalene) (PET), poly (ethylene naphthalene) (PEN), cellulose acetate or modified poly (ethylene terephthalene) -glycol (PETG).

The first polymer film 12 and the second polymer film 16 may be the same or different. As shown in FIG. 1, the first polymer film 16 is positioned toward a viewing space 18, and this orientation is usually performed by the first polymer film 12 and the first polymer film 12. 2 The choice of material for the polymer film 16 is determined. For example, the second polymer film 16 may include a hard coat and / or antireflective coating on its surface facing the field of view 18, which will be described in detail elsewhere. In addition, the first polymer film 12 may include an electromagnetic shielding component. Additionally, one or both of the first polymer film 12 and the second polymer film 16 include dyes, pigments, or other additives known in the art, useful for plasma display panel filters. can do.

The polymer sheet stack may be a single polymer sheet or may be a combination of polymer sheets, or polymer sheets and other layers. Various examples of layers that may be combined to form a polymer sheet stack include, but are not limited to:

                       (Polymer sheet) n

          (Polymer sheet // polymer sheet // polymer sheet) m

Here, n is 1 to 10, preferably less than 5, more preferably 1,2 or 3, m is 1 to 5, and 1 or 2 is preferred.

The plasma display panel filter of the present invention is a single glass or other rigid substrate used as a conventional plasma display panel filter that does not come into contact with the plasma display panel module by using an adhesive to bond the plasma display panel filter to the glass layer. It can be placed on. In addition, the plasma display panel filter of the present invention may be disposed between two sheets of glass for forming the plasma display panel filter.

In another embodiment, the plasma display panel filter of the present invention may be suitably disposed directly on the plasma display panel module by using an adhesive between the plasma display panel module and the plasma display panel filter. The adhesive can be any conventionally used adhesive composition and can be sprayed, applied as a separate layer or film, or used directly in the first polymer film shown as component 12 in FIG. 1. Also, the adhesive may be used in the plasma display panel module, and the plasma display panel filter of the present invention may then be used in the adhesive. In various embodiments, the plasma display panel filter may be formed of a pressure sensitive adhesive layer disposed on the first polymer film and a release film disposed on the adhesive layer. Plasma display panel filter installation then includes removal of the release film and subsequent pressurization of the plasma display panel filter to the plasma display panel module. The plasma display panel filter of the present invention preferably has a total thickness of 2 mm or less, 1.5 mm or less, or 1 mm or less.

In various embodiments of the present invention, the plasma display panel filter may be subjected to impacts of more than 0.5 lines, more than 0.75 lines, or more than one line of impact on the adhesive layer, eg, the bonded layer, and the annealed glass. Can be absorbed without.

The plasma display panel filter of the present invention may be manufactured through a method known in the art. For example, a polymer film // polymer sheet // polymer film structure such as that shown by way of example in FIG. 1 is positioned between two sheets of glass and is a process of making a laminate-laminate material superimposed. Can be formed as a stack of related layers. After the lamination process, the glass layer can be removed leaving the embodiment of the plasma display panel filter shown in FIG. 1. While the two polymer sheets in contact with each other are placed, and the entire stack is laminated, after the lamination step, two polymer sheets on two separate polymer films are melt extruded, so that the two separated sheets Another method of forming a two-layer structure is used.

Another method involves the use of solution coding on two polymer film surfaces, wherein the solution coating comprises a crosslinkable system, disposing a polymer sheet in contact with the coated surface of the two polymer films, Starting a crosslinking reaction by heat and ultraviolet radiation. Another technique involves the coating of both separated polymer films, using polymeric dispersion. This coated dispersion forms a viscoelastic layer on the surface of the polymer film being dried.

The present invention also includes a method for producing a plasma display panel filter of the present invention by forming a multilayer structure immediately after extrusion of the polymer sheet stack. As shown in FIG. 2, the polymer sheet 22 is extruded from the extruder 20. The first polymer film roll 24 and the second polymer film roll 26 feed the first polymer film 27 and the second polymer film 28 onto the first roller 32 and the second roller 34, respectively. do. The 1st roller 32 and the 2nd roller 34 are formed in the fixed corresponding position state, or are formed so that an internal pressure may be applied. As shown in the figure, while the polymer sheet 22 is in a hot melt phase, the first polymer film 27, the polymer sheet 22 and the second polymer film 28 may be formed of a first roller 32. Force is applied together between the < RTI ID = 0.0 >) < / RTI > The rollers 32 and 34 may be any suitable rollers, and in various embodiments, the rollers are rollers that are ground, cooled or heated. In another embodiment, polymer sheets coextruded at the same level may be used. In yet another embodiment, the composite polymer sheet may be extruded separately and may be passed through a first roller 32 and a second roller 34 to form a plasma display panel filter having a composite polymer sheet polymer sheet stack. Can be.

In this embodiment, it is particularly preferable to employ a plasticized poly (vinyl butyral) polymer sheet, shown as component 22 in FIG. 2. In various embodiments, the poly (vinyl butyral) sheet is made to have a relatively smooth surface topology to allow for proper lamination to the polymer films 26 and 28 under high temperature conditions. In this embodiment, the surface roughness Rz may be 20 µm or less, 15 µm or less, or 10 µm or less. The use of this technique requires little or no heat treatment for the laminated structure. Very soft polymer sheets can be produced, for example, by increasing the die lip temperature on the extruder, as well as other methods conventionally used in the art, or by using a smooth coated surface on the die lip.

The method of the present invention includes the application of heat and pressurization of all the plasma display panel filters of the present invention to a plasma display panel module with little or no use. Such low heat, low pressure applications are particularly useful for plasma display panel modules that may be damaged or destroyed when high heat and pressure are used to laminate one or more layers on the plasma display panel module. In various embodiments of the present invention, the plasma display panel filter of the present invention uses an adhesive and a pressure of 60 ° C., 50 ° C., or 45 ° C. or less, and 2 bar, preferably 1 bar or less. It is bonded to the panel module.

Polymer  Sheet( POLYMER SHEET )

The polymer sheet of the present invention may include all suitable thermoplastic polymers such as poly (vinyl butyral), polyurethane, ethylene vinyl acetate (EVA), acrylate, silicone, and the like. Suitable polymers for use in the polymer sheet of the present invention may be formed into a sheet, perform a function of retaining pigments and other additives, have acceptable optical properties, are stable, glass, polymer films And easily adhered to other media. More clearly intended is US Patent Re. 20,430; 2,496,480; 3,271,235; 5,853,828; 6,093,471; And poly (vinyl butyral) formulas disclosed in 6,559,212.

As used in the polymer sheet stack of the present invention, the polymer sheet functions as an impact resisting layer and an agent for holding the layer. In general, as is well known in the art, the thickness and construction of one or more polymer sheets can be easily controlled to produce a sheet of desired thickness with the desired impact resistance properties. In addition, two or more sheets can be combined to produce the desired net effect. For example, the polymer sheet stack may in particular consist of a first polymer sheet comprising a dye or a pigment, but the adjacent second polymer sheet may be, for example, another dye or incompatible with the first dye or pigment. Pigments. Such polymer sheet bonding provides a simple and effective method of joining polymer sheets for bringing in a preferably finished laminate without systematically producing a sheet providing a bonding benefit.

In various embodiments of the present invention, the polymer sheet consists of poly (vinyl butyral). In one embodiment of the present invention, the poly (vinyl butyral) resins used to form all one or more poly (vinyl butyral) sheets are in a balance represented by poly (vinyl butyral) butyral 2 to 50 wt% represented by polyvinyl alcohol, 5 to 40, 8 to 35 or 10 to 30 wt% hydroxyl group and 0 to 5 wt% represented by polyvinyl acetate 4, 0-3 or 0-2.5 wt% acetate. Poly (vinyl butyral) sheet is solution urticae (Solutia Inc. (Springfield, MA)), three flex butanone site (Butacite ^®) of (Saflex ^®) and DuPont (EI Dupont de Nemours and Company (Wilmington, DE)) of As commercially available.

In various embodiments of the present invention, the poly (vinyl butyral) layer may comprise 10 to 90, 20 to 80, 20 to 60, or 25 to 45 plasticizers relative to the poly (vinyl butyral) resin 100 have. Examples of plasticizers are disclosed in U.S. Pat.No. 4,654,179. In one embodiment, dihexyl adipate and / or triethylene glycol di-2 ethylhexanoate is used.

The polymer sheet of the present invention may further include additives such as dyes, pigment pigments, sunscreens, antioxidants, glass adhesion regulators and the like to improve performance.

The polymer sheet of the present invention may comprise an optical filter agent that is compatible with the base polymer sheet polymer, preferably absorbing at 590 nm. In various embodiments, the agent absorbing at 590 nm is selectively absorbed at 590 nm, meaning that the agent absorbs light in a very narrow band of about 590 nm. This optical filter serves in particular as an absorber of light emitted by the excited, generally neon gas, which is part of the gas of the plasma display unit. This wavelength is preferably absorbed to obtain an improved color balance. Examples of potential optical filter agents include cyanine-based dyes, azulenium-based dyes, qualium-based dyes, diphenylmethane Dyes based on triphenylmethane, dyes based on triphenylmethane, dyes based on oxazine, dyes based on azine, dyes based on thiopyrylium , Dyes based on viologen, dyes based on azo, complex dyes based on metal azo, dyes based on biszo , Dyes based on naphthoquinone, dyes based on anthraquinone, dyes based on perylene, dyes based on indanthrone, phthalocyanine Based dyes, dyes based on naphthalocyanine, Dyes based on nitroso, dyes based on metal dithiol, dyes based on indoaniline, dyes based on quinoline, It is not limited. Examples of useful dyes include, inter alia, Gentex Filtron A178 (Gentex Corp., Carbondale, PA), Gentex Filtron A 193, Pyrromethene 650 (Lambda Physik, Gottingen) , Germany) and Lambda Physik (DQOCI).

The polymer sheet of the present invention may include one or more near infrared absorber (NIR) absorbers. An important purpose of near-infrared absorbers to facilitate the use of remote control devices operating within the frequency range below is to absorb radiation within the wavelength range of 800 nm to 1200 nm.

Useful near-infrared absorbing agents include dyes based on cyanine, dyes based on azulenium, dyes based on qualium, dyes based on diphenylmethane, dyes based on triphenylmethane, oxazine based Based dyes, dyes based on azine, dyes based on thiopyryllium, dyes based on viologen, dyes based on azo, complex dyes based on metal azo, based on bisazo One dye, a dye based on naphthoquinone, a dye based on anthraquinone, a dye based on perylene, a dye based on indanthrone, a dye based on phthalocyanine, a dye based on naphthalocyanine , Dyes based on nitroso, dyes based on metal dithiol, dyes based on indoaniline, dyes based on quinoline, but are not limited to these. Examples of useful dyes are Gentex Pitron A101, Gentex Pitron A195, Keystone TB225 (Keystone Aniline Corp., Chicago IL), Lamborghini Physkey, such as those disclosed in published US patent application 20020182422. (Keysorb) 975 nm, TN228 keysorb 993 nm, IR5, IR6, IR132 or quaterylene tetracarboxylic diimide (quaterrylenetetracarboxy

lic diimides).

Near-ultraviolet absorption can also be achieved using nanoparticle technology, and among others, antimony tin oxide (ATO), indium tin oxide (ITO) (see US Pat. No. 5,830,568), LaB ₆ (lanthanum hexaboride, US patent application) 200200086926), or semiconductor nanoparticles.

In a preferred embodiment, the one or more polymer sheets of the plasma display panel filter of the present invention comprise a near ultraviolet absorber, and in a specific embodiment, the additional near ultraviolet absorbent is LaB ₆ , Gentex Filtron A101, Gentex Fill. Tron A195, gentex piltron A208 and quaternylenetetracarbosyl diimide.

Phthalocyanine dyes and dithiol metal complex dyes are particularly suitable for use as agents for absorbing near infrared rays in the polymer sheet layer of the present invention. These dyes provide very good thermal stability and near-infrared absorption unless they are excessive in the color properties and light transmission properties of the layer and do not have a negative impact.

In various embodiments of the invention, the one or more polymer sheets comprise a phthalocyanine dye, a dithiol metal complex dye, LaB ₆ Or compounds thereof.

In various embodiments, the one or more polymer sheet layers comprise phthalocyanine dyes. The phthalocyanine dye can be combined with any other agent disclosed herein. Selected phthalocyanine dyes include Excolor IR12, Xcolor IR14, TX-Ex 906B, TX-Ex 910 and Xcolor IR10A (available from Nippon Shokubai (Osaka, Japan)), Pro-jet 900NP and Projet 830NP (Avecia (Manche-

ster, United Kingdom) and YKR-3070, YKR-3080 and YKR-3081 (available from Yamamoto Chemical, Inc., Osaka, Japan). Other phthalocyanine dyes that may be used include those disclosed in US Pat. No. 6,323,340 and those available from Mitsui Chemicals, Tokyo, Japan, and Keystone Aniline, Chicago, Illinois.

These phthalocyanine dyes can be incorporated into the polymer sheet of the present invention at any suitable concentration depending on the use, as can be readily determined by one skilled in the art. In various embodiments, for example, phthalocyanine can be incorporated into a polymer sheet 0.5 nm thick, at a weight / weight concentration of 0.01-0.20, 0.015-0.15 or 0.05-0.10. In general, very thick sheets may have low concentrations of phthalocyanine, and less thick sheets may have higher concentrations of phthalocyanine dyes to achieve the desired results.

In various embodiments of the invention, the phthalocyanine dye comprises one or more NHR-side groups, one or more SR-side groups and optionally a halogen group, wherein R is substituted or unsubstituted phenyl, alkyl Or an aryl group. In various embodiments of the invention, the phthalocyanine dye forms a complex with antimony.

In various embodiments of the invention, the phthalocyanine dye comprises one or more NHR-side groups and, optionally, a halogen group, wherein R is a substituted or unsubstituted phenyl, alkyl or aryl group.

In various embodiments of the invention, the phthalocyanine dye comprises one or more SR-side groups and optionally a halogen group, wherein R is a substituted or unsubstituted phenyl, alkyl or aryl group.

In various embodiments, the one or more polymer sheets comprise dithiol metal complex dyes. All compatible dithiol metal complex dyes as known in the art can be used, examples include those disclosed in US Pat. No. 6,522,463 and EP 1385024.

In various embodiments, the dithiol metal complex dye is MIR-101 (available from Midori Kagaku Company, Tokyo, Japan). In various embodiments, the dithiol metal complex dye is Gentex Filtron A208 (available from Gentex Corporation, Carbondale, Pensylvania).

In various embodiments, the one or more polymer sheet layers comprise LaB ₆ .

In general, the dyes used may be selected because they provide a high visible / near infrared transmission ratio and provide a relatively flat transmission across the visible spectrum.

In various embodiments of the present invention, one or more polymer sheets, having one or more described agents, are laminated between two glass sheets of 2 mm thickness to produce the following 450 μm thickness Optical characteristics.

Up to 2%, 1.5% or 1% transmission over the 300-380 nm range

Transmission from 30% to 70%, 35% to 70%, or 35% to 65% over the range of 400 to 582 nm and 596 to 780 nm

60%, 50%, or 40% or less transmission over the 583 to 595 nm range

15%, 13%, 10%, 7%, or 5% variation over the range of 420-579 nm and 611-800 nm

Up to 20%, 17.5%, or 15% transmission over the 800-1200 nm range

Less than 15%, 12.5% or 10% transmission over the 820-980 nm range, and

Color transmission values a * and -15-7, -12-6, -10- in the range of -7-7, -6-6, -5-5, or -5-0 5, or color transmission value b * within the range of -10 to -2

Many other ranges beyond the defined ranges for the optical properties can be any suitable combination as desired.

In various embodiments of the present invention, there is provided a polymer sheet comprising a thermoplastic polymer such as poly (vinyl butyral), EVA (ethylene vinyl acetate), or polyurethane, and having the optical properties and functional addition system described just before. do. In this embodiment, the polymer (appropriate resin and plasticizer) is 98% by weight of the polymer sheet having a functional addition system that constitutes 0.01-2%, 0.2-1%, or 0.2-1.5% by weight of the sheet. From 99.9%. In this embodiment, the functional addition system is disclosed herein on a weight of basis, and as known in the art, 0-50% UV stabilizer, 1-10% or 2-6% porphyrin ( porphyrin) dyes such as Gentex Filtron A178 and A193 (available from Gentex Corp., Carbondale, PA) and those manufactured by Mitsui Chemicals, Tokyo, Japan, 49-95% or 65- 95% near ultraviolet absorbing pigment, and 0-50% or 5-30% organic dye or pigment having a range that can be combined in any suitable combination.

Since the near-ultraviolet absorber introduces the yellow green aspect into the polymer sheet, more preferably color correction can be achieved by adding a colorant to one or more polymer sheets, and these pigments have any absorbing action. It can be applied to a polymer sheet in a polymer sheet stack that lacks it. Such pigments may include pigments or dyes that absorb within special wavelength ranges specifically selected to alter the color of the spectrum as is known in the art.

In various embodiments of the present invention, one or more pigments may be mixed or printed on the surface of the polymer sheet as disclosed in US Pat. Nos. 3,922,456 and 3,982,984. In one embodiment, copper phthalocyanine pigment blue can be used as the pigment (Sigma-Aldrich Corp., St. Louis, MO). In yet another embodiment, C.I. commonly used as "KEYSTONE BLUE RC" (Keystone Aniline Corp., Chicago IL). Solvent Blue 102 can be used as a pigment.

The polymer sheet structure of the present invention can be completed through all methods known in the art. The plasticized poly (vinyl butyral) sheet to a thickness of about 0.13 mm to 1.3 mm, for example, by extruding a mixed formulation through a sheet die, for example, to substantially form the sheet. By pressing and melting plasticized poly (vinyl butyral) through a horizontally long, vertically narrow die opening to size, or close to the die outlet for adding desired surface properties to one side of the polymer. The molten polymer coming out of the extrusion die on the die roll can be formed by casting.

The polymer sheet of the present invention may have a thickness of 100 or more or 500μ. In embodiments having one or more polymer sheets, the polymer sheets have a total thickness as defined above, and each individual polymer sheet may be as thin as about 50 microns.

Polymer sheet

As used herein, "polymer film" refers to a relatively thin, rigid polymer layer that functions as a performance to strengthen the layer and corresponds to components 12 and 16 of FIG. Poly (ethylene terephthalate) or cellulose acetate is most commonly used as a polymer film.

The polymer sheet can be any suitable film that is hard enough to provide a relatively flat, stable surface, which is conventionally used, for example, as the ability to strengthen layers in multilayer glass panels. The polymer film is more preferably optically transparent (i.e., an object adjacent to one side of the layer can be comfortably seen by the particular observer's eye looking through the layer on the other side) and is typically larger than the adjacent polymer sheet. , In some embodiments, has a significantly large tesile modulus, regardless of configuration.

In various embodiments, the polymer film is made of a thermoplastic material. Among the thermoplastics, those having suitable properties are nylon, polyurethanes, acrylics, polycarbonates, polyolefins such as polypropylene, cellulose acetates and triacetates, vinyl chloride polymers and copolymers, and the like. In various embodiments, the polymer film comprises poly (ethylene terephthalate), poly (ethylene naphthalate) (PEN), or cellulose acetate. In various embodiments, the polymer film is again re-stretched, has the properties described above, and consists of a material such as a thermoplastic film comprising polyester. In various embodiments, the polymer film comprises poly (ethylene terephthalate) or consists of poly (ethylene terephthalate), and in various embodiments, at elevated temperatures (after 30 minutes at 150 ° C. in both directions). , For example under 2% shrinkage), the poly (ethylene terephthalate) is stretched biaxially to improve strength and / or heat stabilized to provide low shrinkage properties .

In various embodiments, the polymer film may have a thickness of 0.013 mm to 0.20 mm, 0.025 mm to 0.1 mm, or 0.04 mm to 0.06 mm. The polymeric film may optionally be surface treated or coated with a functional performance layer to enhance one or more properties such as adhesion or infrared reflection.

Various coating and surface treatment techniques for poly (ethylene terephthalate) and other polymer films that can be used with the present invention are disclosed in published European Application No. 0157030.

The polymeric film can be treated or coated to add desirable properties. For example, the polymer film may be an antireflective layer (such as a coated titanium oxide or silicon oxide film) and an electromagnetic shielding layer (copper grid or equivalent material such as silver, palladium, platinum and gold—for example, US Pat. No. 6,197,408 6,086,979 and 6,207,266). In various embodiments, the shielding component comprises a copper wire or copper mesh that can be used in the polymer film, for example, via photo-lithographic techniques.

In various embodiments of the present invention, as shown in FIG. 1, the first polymer film 12 is antireflective on a surface facing the hard coat disposed on the viewing area and / or the antireflective layer. It may have a layer.

Hard coat ( HARDCOATS )

Hardcoats that can be used with the present invention include everything that is compatible with the second polymeric film and can achieve the desired physical and optical properties. Thermoplastics, thermosets, or cross linked polymeric materials that function as protective layers, such as acrylates and urethane hardcoats, can be used as the hardcoat material. Another example of a useful hardcoat material that can be used as a hardcoat for the present invention is a radiation cured product, such as an ultraviolet or infrared cured product, and (a) hydrolysis. And methyltriethoxysilane condensates; Or (b) heat a mixture of a poly (silic acid) and a copolymer of a fluorinated monomer having a compound comprising a primary and secondary alcohol group, or Plasma cured products.

Useful hardcoat materials in the present invention include polyesters, polyethers, acrylics, epoxy resins, urethanes, alkyd resins, spiroacetal, polybutadiene, or polythiol polyene resins having relatively low molecular weights. acrylate functional groups such as resins, prepolymers that are polyfunctional compounds such as methacrylate oligomers or polyhydric alcohols, or reactive diluents. As an example, monofunctional monomers such as ethyl (meth) acrylate, ethylhexyl methacrylate, styrene, methylstyrene or N-vinylpyrrolidone, or trimethylolpropane trimethacrylate, hexane Diol methacrylate, tripropylene glycol dimethacrylate, diethylene glycol immethacrylate, pentaerythreat Containing large amounts of multifunctional monomers such as tall trimethacrylate, dipentaerythritol hexamethacrylate, 1,6-hexanediol dimethacrylate or neopentyl glycol dimethacrylate, or all mixtures and compounds mentioned above It further contains resin. Other hardcoats known in the art may be used. In various embodiments, the hardcoat of the present invention comprises a member selected from the group consisting of epoxy, vinyl ether and acrylate.

glue( ADHESIVES )

A wide variety of adhesives can be used to adhere the plasma display panel filter of the present invention to the plasma display panel. Adhesives are selected based on module and polymer film layers, optical function, stability, economy and compatibility with other related factors. Especially preferred are adhesives which can be used even under conditions of high temperature or high pressure.

Particularly useful groups of adhesives are pressure sensitive adhesives, or PSAs. Some general techniques are used in the manufacture of PSAs, including solvent-based, hot-melt and emulsion processes. Four main types of PSAs are obtained from rubber-based, acrylic, modified acrylic and silicone formulations. Each of these types exhibits completely different performance characteristics.

Acrylic, modified acrylic and silicone formulations are preferred. Acrylic PSAs provide resistance to solvents, UVlight, high temperatures, plasticizers, chemical reagents and sterilization methods, and provide extremely long life and environmental resistance. Modified acrylics contain additives to achieve various desired results.

The PSA of the present invention can be used directly in a module or plasma display panel filter. For example, the plasma panel filter may be formed to have a pressure sensitive adhesive formed on one surface and protected by a release liner. The liner can be removed if desired for use as a module.

All agents useful in the compatible plasma display panel filters described herein can also be added to the adhesive, in addition to, or in addition to, the polymer sheet or polymer film layer. In general, the agent may be mixed directly with the adhesive prior to using the adhesive in a plasma display panel module or plasma display panel filter.

In various embodiments of the present invention, among others, such as coated glass, coated polymer structures (typically poly (ethylene terephthalate)), available from 3M, and described in US Pat. No. 6,498,683, Alternatively, multilayer films may be used for infrared absorption.

It is also possible to combine the near infrared absorber with the coated glass, coated polymer, or multilayer film to achieve the desired result. For example, a near infrared absorber bond in poly (vinyl butyral) with an infrared reflecting film is reported in US Patent Application 20030054160, which reports a near infrared absorber coated on poly (ethylene terephthalate) and bound to poly (vinyl butyral). Reported in Such linkages may be suitably used with embodiments of the present invention.

In all embodiments of the present invention wherein an agent is added to the polymer sheet to add the desired properties,

It is usually possible that some or all of the added agent can be used in the polymer film layer or the glass layer instead of, or in addition to, the polymer sheet containing the agent, and will be appreciated by those skilled in the art. will be. For example, the polymer film may be coated with LaB ₆ , and then between the two polymer sheets to form a polymer sheet stack, with two polymer sheets free of pigment or with low levels of pigment. Can be laminated. Some agents intended herein may be used directly on the glass layer (eg, viewing side of the plasma display panel module). All agents of the invention mentioned herein can be used as appropriate in this way.

A distinct advantage of the present invention is the improvement over electromagnetic radiation transmission, absorbance and reflectance characteristics. As described elsewhere herein, the plasma display panel filter of the present invention employing one or more polymer sheets, when the plasma display panel filter is disposed between two glass layers each having a thickness of 2 mm, Preferably, filters with the following qualities include: 20 to 60%, 30 to 50% or 35 to 45% transmission in the visible range, 0 to 65%, 5 to 50%, and 10 to 590 nm. 40%, or 20-30% transmission; 30%, 25%, or 20% or less at 800 nm, 25% or less, 20% or less, 15% or less at 850 nm, 15% or less, 12% or less, 10% or less within the range 900 to 1100 nm, Or less than 6% transmission; Transmission below 15% or below 10% within 1100-1200 nm. All ranges given above may be combined with each other in any combination to achieve the desired result in all the various embodiments of the invention.

For all polymer layers in the filter of the invention, the selectable a * and b * factors (as based on the L * a * b * calorimetry system) values are -15 and +15, -10 and +10, -5 and +5 and -2 and +2.

In various embodiments of the invention, and in particular, plasma display panel filters for non-contact conventional use are not glass and have a high glass transition temperature, for example 60 ° C. or 70 ° C. or higher, for example Polycarbonates and polyalkyl methacrylates can be included, in particular all suitable glazing type materials such as rigid plastics, having 1-3 carbon atoms, in alkyl moieties.

The invention also includes a method of filtering electromagnetic radiation produced by a plasma display panel, and a method consisting of passing the radiation through all the plasma display panel filters disclosed herein.

The present invention further includes an apparatus using a plasma display panel in which the present invention plasma display panel filter is used. Examples include, but are not limited to, monitors or televisions.

This invention includes the plasma display panel which consists of a plasma display panel filter which is this invention.

The present invention includes a composite structure of a plasma display panel filter of the present invention disposed at a suitable location on a viewing surface of a plasma display panel module.

The present invention includes a method of manufacturing a plasma display panel filter including those described throughout this specification.

The present invention also includes a method of manufacturing a plasma display panel and a composite plasma display panel filter / plasma display panel module unit as disclosed elsewhere herein.

By using the CIELAB system, which is a well-known international standard for colorimetric measurement, the color of an object under a fixed viewing condition can be clarified. Dimensionless coordinates L *, a *, b * are used to clarify the hue and intensity of the color. These coordinates are measured according to the description provided in the publication "Standard Practices for Color Computing of Objects by Using CIE Systems", ASTM E 308-01. The wavelength range is between 400 nm and 700 nm, with a wavelength interval of 20 nm. Coordinate L * is used to measure the lightness or darkness of a color. White is represented by L * = 100 and black is represented by L * = 0. Coordinate a * measures the level of green or red in an object, and coordinate b * measures the degree of blue or yellow in an object.

1 is a schematic cross-sectional view of a portion of a plasma display panel filter of the present invention.

2 is a schematic cross-sectional view of the plasma display panel filter manufacturing method of the present invention.

(Example 1)

The plasma display panel filter for direct lamination is made to have the following layers.

Antireflective triacetyl cellulose layer NOF Realook 8200 (NOF Corporation, Tokyo, Japan) having a thickness of 80μ.

Poly (vinyl butyral) layer having the following configuration: Filtron A178 (0.004%); Excolor IR910 (0.042%); Excolor IR14 (0.005%); Excolor IR12 (0.042%) from Sumitomo Asoka Cement, Ltd. Filtron dyes are available from Gentex, and Excolor dyes are available from Nippon Shokubai (Japan). The plasticizer content (triethylene glycol di-2 ethylhexanoate) of the poly (vinyl butyral) layer is 27.5%.

Hitachi Cu-grid Film Reference as EMI Shielding Element ES-1534 U HCC-42-01A.

Three layers are used for 2.1 mm clear anodized glass. The following optical properties are obtained.

                   Tl at 590 nm: 30.0%

                   Tl at 815 nm: 14.5%

                   Tl at 850 nm: 6.3%

                   Tl at 900 nm: 5.1%

                   Tl at 950 nm: 7.0%

                   Tl at 980 nm: 8.4%

In this structure, the thickness of the poly (vinyl butyral) was 44.6%, and the color coordinates represented by a * and b *, which gave a somewhat bluish aspect to the system, which is generally preferred for plasma display panels, -3.0 and -4.5, respectively.

(Example 2)

In Example 1, impact testing of a given type of filter was performed using a ball impact tester: 200 g metal balls fell over 5 cm incremental filters until breakage of the glass occurred. For unannealed glass without poly (ethylene terephthalate) or with poly (vinyl butyral) bonded to the glass plate, the glass is broken at a drop height of 5 cm.

For a filter having a poly (ethylene terephthalate) having a thickness of 180 mu and a poly (vinyl butyral) layer having a thickness of 0.38 mm, a maximum drop height of 20 cm is obtained before breakage occurs. For a filter having a poly (ethylene terephthalate) having a thickness of 180 mu and a poly (vinyl butyral) layer having a thickness of 0.76 mm, a maximum drop height of 45 cm is obtained. For a filter with 180 μm thick poly (ethylene terephthalate) and 1.14 mm thick poly (vinyl butyral) layer, corresponding to an absorbed energy of approximately 1.95 Joules, a maximum drop height of 95 cm is achieved.

While the invention has been described in terms of representative embodiments, it will be appreciated that various changes can be made by those skilled in the art, and that equivalents may be replaced by components that do not depart from the scope of the invention. Could be. In addition, many modifications may be made to adapt a technique to a particular state or material without departing from the spirit of the invention. Thus, while the invention is intended not to be limited to the particular embodiments disclosed as the best mode contemplated for carrying out the invention, the invention is intended to encompass all embodiments falling within the scope of the appended claims.

 All ranges, values, or given features for every single component of the invention, as given herein, may be modified to form embodiments having limited values for each component, such that It will also be appreciated that all ranges, values, or all features for all components may be used interchangeably.

The drawings may not be drawn to scale unless otherwise indicated.

Each reference, including magazine articles, patents, applications and books referred to herein, is incorporated by reference in its entirety.

Claims (16)

A first polymer film, A second polymer film, In the multiple layer plasma display panel filter consisting essentially of a polymer sheet stack including a polymer sheet, And the polymer sheet stack is disposed between the first polymer film and the second polymer film. According to claim 1, The polymer sheet stack is a multilayer plasma display panel filter made of the polymer sheet. According to claim 1, Wherein said polymer sheet stack comprises one or more additional polymer sheets. According to claim 1, And the polymer sheet comprises poly (vinyl butyral), ethylene vinyl acetate, or polyurethane. According to claim 1, And wherein the first polymer film, the second polymer film, or both the first and second polymer films comprise poly (ethylene terephthalate). According to claim 1, The multilayer plasma display panel filter has a thickness of 1.5mm or less. According to claim 1, And the first polymer film comprises an electromagnetic interference shield. The method of claim 7, wherein And said electromagnetic shield comprises a poly (ethylene terephthalate) metal coating layer. According to claim 1, The second polymer film is a multilayer plasma display panel filter comprising an antireflection layer. The method of claim 9, The anti-reflective layer has a visible range of 5% or less. According to claim 1, The second polymer film is a multi-layer plasma display panel filter comprising a hardcoat (hardcoat). The method of claim 11, wherein The hard coat is a multilayer plasma display panel filter having a pencil hardness of 2H, or greater. According to claim 1, The multilayer plasma display panel filter Up to 2%, 1.5% or 1% transmission over the 300-380 nm range Transmission from 30% to 70%, 35% to 70%, or 35% to 65% over a range of 400 to 582 nm and 596 to 780 nm 60%, 50%, or 40% or less transmission over the 583 to 595 nm range 15%, 13%, 10%, 7%, or 5% variation over the range of 420-579 nm and 611-800 nm Up to 20%, 17.5%, or 15% transmission over the 800-1200 nm range Less than 15%, 12.5% or 10% transmission over the 820-980 nm range, and Color transmission values a * and -15-7, -12-6, -10- in the range of -7-7, -6-6, -5-5, or -5-0 5, or color transmission value b * in the range of -10 to -2; A multilayer plasma display panel filter having phosphorus spectral characteristics. Plasma display panel module, A plasma display panel comprising a plasma display panel filter disposed to be in contact with the plasma display panel module having an adhesive layer. The plasma display panel filter, A first polymer film, A second polymer film, A polymer sheet stack comprising a polymer sheet, The polymer sheet stack is disposed between the first polymer film and the first polymer film. 15. The plasma display panel of claim 14, wherein the adhesion has a performance of strengthening one or more agents. A plasma display panel comprising a multilayer plasma display panel filter, The multilayer plasma display panel filter A first polymer film, A second polymer film, A polymer sheet stack comprising a polymer sheet, The polymer sheet stack is disposed between the first polymer film and the second polymer film, And the plasma display panel filter is attached to a plasma display panel module of the plasma display panel filter using an adhesive.

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