JPS5990802A - Light shielding screen for preventing reflection of external light - Google Patents

Abstract

PURPOSE:To provide the image of a television receiver or the like having high contrast and easy visibility by constituting the titled screen wherein the one surface of a transparent base plate is subjected to an anti-dazzling treatment and a colored matte relief having an interspersed dot, stripe or grating pattern is provided on the other surface. CONSTITUTION:A light shielding screen 1 for preventing reflection of external light consists of a transparent base plate 2 and a colored matte relief 3. The surface 2a positioned on the side of the plate 2 furthest from a cathode ray tube A while said screen is in use is subjected to the anti-dazzling treatment by which the glossiness on a 60 deg. specular surface as regulated in JIS Z 8741 ''Method for Measuring Glossiness'' is made 20-80%. The relief 3 is provided on the surface 2b opposite from the surface 2a of the plate 2. The specular reflection of external light on the surface of the plate 2 is thus prevented and the ray transmitting the plate 2 is absorbed and scattered by the surface of the relief 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an external light antireflection light-shielding screen that is used, for example, to block external light incident on the image area of a television receiver (staged display tube).

Conventionally, various types of light-shielding screens have been proposed for television receivers and the like, which block incident external light and prevent the received light from becoming difficult to see due to the external light. For example, JP-A-51-44186 and JP-A-51-75456 describe a light-shielding screen consisting of three layers: a transparent glass layer, a light-reflecting layer, and a light-shielding layer.

However, the manufacturing method of these conventional light-shielding screens is complicated, and their products, especially the light-shielding screens described in the above-mentioned No. 9, are difficult to make to have a uniform thickness, and the surface of the screen is rough. It had problems such as visibility. Further, the surfaces of these light-shielding screens have problems such as specular reflection of smooth and smooth incident light, making it difficult to see images on a television receiver or the like.

In addition, a light-shielding screen made of a transparent resin plate with a black screen inside to create a louver effect is also known, but it causes a ghost phenomenon, is difficult to manufacture, and cannot be obtained with a large area. There was a drawback that it wasn't.

The inventors of the present invention conducted various studies with the aim of obtaining a light-shielding screen that does not have the above-mentioned drawbacks, and as a result, the light-shielding screen was created by applying anti-glare treatment to one side of a transparent substrate, and applying anti-glare treatment to the other side of the transparent substrate. The present inventors discovered that by providing a colored matte relief in the form of scattered dots, stripes, or checkered patterns, it was possible to increase the contrast of images on television receivers and make them easier to see, leading to the completion of the present invention. .

That is, in the present invention, JIS Z8741 "Glossiness?
llllll 60 degree specular gloss specified by law is 20~
A special enemy of external light is that a colored matte relief consisting of scattered dots, stripes, or a checkered pattern is provided on the opposite side of the nuclear anti-glare treated surface of a transparent substrate that has been subjected to an anti-glare treatment of 80%. This invention relates to an anti-reflection light-shielding screen.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the external light reflection prevention light shielding screen according to the present invention will be explained in detail with reference to the drawings.

1 to 4 are partially enlarged front views of the external light antireflection light-shielding screen according to the present invention with different arrangements of colored matte reliefs, and FIG. 5 is a sectional view taken along the line X-X in FIG. 3;
FIG. 6 is a cross-sectional view corresponding to FIG. 5 showing an application example of the present invention, and FIG. 7 is an explanatory view showing the usage state of the external light reflection prevention light shielding screen according to the present invention.

In the drawings, reference numeral 1 denotes a light-shielding screen for preventing reflection of external light (hereinafter sometimes abbreviated as a light-shielding screen) according to the present invention, which includes a transparent substrate 2 and a colored matte 5 relief (hereinafter sometimes abbreviated as relief). It consists of 3. When the light-shielding screen 1 is used as shown in FIG. 7, the transparent substrate 2 is located on the farthest side from the cathode ray tube A.
Anti-glare treatment with a 60 degree specular gloss of 20 to 80 is applied. And relief 3 is transparent substrate 2
It is provided on the surface 2b opposite to the surface 2a. The relief 3 is colored and matted by containing a matting agent, and there are basically three ways to arrange it. The one shown in the figure has a vertical and horizontal striped pattern, and the one shown in FIG. 4 has a gold checkered pattern. A preferable example of the spacing and dimensions of the striped or checkered pattern of such relief 3 is as shown in FIG. 5, where the width of the relief is a1, the spacing is b1, and the height is C. 2000μ, more preferably 1-i200~12
00/^ Width a is preferably 20 to 500μ, particularly preferably 100 to 300μ, spacing is 20 to 1000μ, particularly preferably 200 to 600μ, width/spacing=11
5 to 1/1, spacing/height = 110.6 to 1/2 is preferred.<1 spacing/height -110,35 to 1/2 is particularly preferred.

In the present invention, another transparent substrate 4 may be provided on the side of the relief 3 opposite to the transparent substrate 2 as in the sixth example. In this case, another transparent substrate 4 may be provided on the opposite side of the relief 3 to the relief 3.
The surface (positioned on the side closest to the cathode ray tube A during use) may be subjected to the same anti-glare treatment as the surface 2a of the transparent substrate 2.

Next, each part of the configuration will be explained in more detail.

The transparent substrate 2 may be made of transparent glass, polymethyl methacrylate, polystyrene, polyvinyl chloride, polycarbonate, polypropylene, polyethylene prephthalate, acetyl cellulose, polyvinylidene chloride, polyethylene vinyl acetate, polyacrylonitrile, polyamide,
Examples include polyvinyl alcohol, and the thickness thereof is usually 1 to 10 mm, but in the case of plastic, a film or sheet having a thickness of 20 μm or more, preferably 50 μm or more can also be used.

Among these, transparent glass, polymethyl methacrylate, polycarbonate, polyethylene terephthalate, etc. are preferred from the viewpoint of ease of handling.

Examples of the anti-glare treatment applied to the transparent substrates 20 and 2a include etching and polishing with a very fine abrasive.

The effects of the present invention can be sufficiently obtained when the 60 degree specular gloss (JIS Z874.1) provided by such anti-glare treatment is 20% to 80%, preferably 50% to 70%, or is less than 20%. In this case, diffuse reflection increases on the surface of the transparent substrate 2 and the number of strokes on the cathode ray tube becomes blurred, and when the number exceeds 80, regular reflection increases on the surface of the transparent substrate 20, making it difficult to see the image due to the so-called "embedding" phenomenon. The transparent substrate 4, which may be further provided opposite to the transparent substrate 2 of the relief 3 of the light-shielding screen 1, is made of 4J'X having rigidity or flexibility, such as acrylic resin, polyester, polycarbonate, or triacetate.

Polyvinyl chloride, glass, etc. are preferred. When anti-glare treatment is applied to these, it is performed in the same manner as the transparent substrate 2.

The relief 3 may be formed by molding a thermoplastic synthetic resin into a desired shape and bonding it to the surface 2b of the transparent substrate 2, for example. Most preferred are those formed by exposure to light on 2b. These reliefs 3 contain a surface matting agent and are dyed in the dyeing process 1. ! J! However, it has been published. Surface matting agents include titanium monochloride, mica, calcium carbonate, powdered glass (product name Nigelasvar, particle size 5-15 μm), fine particulate silica (product name: Cyroid, Aerosil, etc. particle size 5-20 μm), The content of alumina powder, clay, etc. in Relief 3 is 1 to 20 layers, preferably 5 to 10 layers. When the content is less than 0.1% by weight, there is no effect of reflecting external light, and when it exceeds 20% by weight, the transparency of the relief 3 becomes poor and the resolution of the relief 3 decreases due to light scattering. It is more preferable that the content of the surface matting agent is selected within the above range so that the surface of the relief 3 has a reflectance of 20 or less. Among these surface matting agents, particulate phosphoric acid is a preferable surface matting agent from the viewpoint of dispersibility, optical refractive index, and the like. Further, the dye used for the dyeing treatment of the relief 3 may be a normal dye, but a metal-containing disperse dye is preferable from the viewpoint of weather resistance.

Representative photosensitive resin compositions most preferably used as raw materials for forming the entire relief 3 include a prepolymer having an ethylenically unsaturated group and, if necessary, an ethylenically unsaturated group.
There is a composition consisting of a monomer, a photopolymerization sensitizer J411, and a thermal polymerization inhibitor. The above-mentioned prepolymers include unsaturated polyester, unsaturated polyurethane, oligonisedel acrylates, unsaturated polyamide, unsaturated polyimide, unsaturated polyether, unsaturated poly(meth)acrylate and modified products thereof, carbon- Examples include rubber compounds having carbon double bonds. These prepolymers generally have a number average molecular weight of substantially 500 or more.

To give more specific examples, unsaturated polyesters and alkyds include unsaturated dibasic acids such as maleic acid, fumaric acid, and itaconic acid, or their acid anhydrides, ethylene glycol, clopylene glycol, diethylene glycol, Triethylene glycol, glycerin, trimethylolzoron, pentaerythritol, 1,4-polybutadiene with terminal hydroxyl groups, hydrogenated or non-hydrobutylated 1,2-
Polyesters with polyhydric alcohols such as polybutadiene, butane-styrene copolymers, butane-acrylonitrile copolymers, co-coating of some of the above acid components, adipine, phthalic acid, inphthalic acid, phthalic anhydride.
Examples of unsaturated polyurethanes include polyesters substituted with saturated polybasic acids such as surfactants and trimellitic acid, or polyesters modified with drying oil fatty acids or semi-drying oils and fats. Urethane group τ derived from polyincyanate
Addition-polymerizable unsaturated groups are introduced using terminal incyanate groups or hydroxyl groups of compounds connected by valves,
For example, 1,4-polybutadiene, hydrogenated or non-hydrogenated 1,2-polybutadiene, butadiene-styrene copolymer, butadiene-acrylonitrile, which have a polyol terminal hydroxyl group, such as the above-mentioned polyhydric alcohol, polyether polyol, or polyether polyol. A copolymer with a polyisocyanate such as toluylene diisonanate, diphenylmethane-4,4'-cyynonanate, hexamethylene diisonanate, etc., into which an unsaturated group is introduced using the reactivity of the terminal isocyanate or hydroxyl group of polyurecun. Among the unsaturated carboxylic acids or esters thereof, unsaturated groups can be introduced by reacting compounds with active water groups such as hydroxyl groups, carboxyl groups, and amine groups with isocyanates, or carboxyl groups can be introduced. Oriconister acrylates include compounds into which an unsaturated group is introduced by reacting the unsaturated polyester with a hydroxyl group, or compounds in which the unsaturated polyesters mentioned above are linked with a polyisocyanate. Acrylic acid or methacrylic acid is allowed to coexist and co-condensed to adjust the molar ratio of each to achieve a molecular weight of 2.
00 to 5,000, such as adipic acid, phthalic acid, inophthalic acid or acid anhydride, and polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, glycerin, trimethylolpropane, and pentaerythritisotona. Condensation of acrylic with methacrylic acid in the system; polycondensation reaction of epoxy acrylates, such as polyhydric alcohols, polyhydric phenols, or polyphenols with epichlorohydrin or alkylene oxide. esters of acrylic acid or methacrylic acid with compounds having epoxy groups obtained by Compounds obtained by reacting polymeric compounds with hydroxyl groups with unsaturated carboxylic acids or their acid anhydrides, and polymeric compounds with carboxyl groups such as polymers or copolymers of acrylic acid or methacrylic acid. ,
Unsaturated alcohols, glyllyl acrylates or methacrylates with all ester bonds, maleic anhydride-containing copolymers and allyl alcohol; reaction products with hydroxyalkyl acrylates or methacrylates, glylly acrylates or methacrylates, etc. Examples of reaction products of copolymers contained as polymerization components and acrylic acid or methacrylic acid include ren copolymers, butadiene-acrylonitrile copolymers, and EPDN.
, (IJ) the hydrogenated product of (1) above, isobutylene-isogrene copolymer, ethylene propylene copolymer, and (
1) Known technique f11 for various rubber compounds and above
Examples include unsaturated modified rubbers into which ethylenically unsaturated groups have been introduced.

Although the compound (1) can be used as it is, in order to introduce the unsaturated group, it is convenient to use various rubber compounds having a terminal functional group. Further, in the case of a rubber compound having a 1°2-polybutene segment, the unsaturated group can be easily introduced by adding maleic anhydride to the compound.

As greborimers other than those mentioned above, there is no problem in using compounds that do not contain double bonds that photopolymerize by a mechanism other than the addition of ethylenic double bonds, such as water-soluble nylon, polyvinyl alcohol, and derivatives thereof.

Various known compounds can be used as the ethylenically unsaturated monomer, and examples of such compounds include unsaturated carboxylic acids such as acrylic acid and methacrylic acid, or esters thereof, such as alkyl-, cyclo-, Alkyl-,
Acrylates and methacrylates, alkylene glycols, and polyoxine alkylenes containing groups such as halogenated alkyl, alkoxyargyl, hydroquine alkyl, aminoalkyl, tetrahydrofurfuryl, allyl, greenyloo, benzyl, and phenoxy. Mono- or diacrylates and methacrylates of glycols, trimethylolgloban triacrylates and methacrylates, pentaerythritol tetraacrylates and methacrylates, acrylamide, methacrylamide or derivatives thereof, such as N-substituted or N,N'- with alkyl, hydroxyalkyl Allyl compounds, such as substituted acrylamides and methacrylamides, diacetone acrylamides and methacrylamides, N,N'-alkylenebisacrylamides and methacrylamides,
For example, allyl alcohol, allyl inanate, diallyl phthalate, triallyl/americate, maleic acid, maleic anhydride, fumaric acid or its esters,
Other unsaturated compounds such as mono- or dimaleates and fumarates of alkyl, alkyl halides, alkoxyalkyl, such as styrene, vinyltoluene, divinylbenzene, N-vinylcarbazole, N-
Examples include vinylpyrrolidone. Further, a part of these monomers may be added to an azide compound such as 4,4'-diazidostilbene, p-phenylene-bisand, 4.
4'-Diazidobenzophenone, 4.4'-Diazidophenylmethane, 4.4'-Diazidochalcone, 2,6-
Di(4'-azidobenzal)-cyclohexanone, 4.
4'-Diazitosderbene-α-carboxylic acid, 4.4'
-cyacytodiphene can be replaced with 4+4'-diazidostilbene-2,2'-disulfonic acid sodium or the like. These monomers may be added in an amount of 0 to 200 parts by weight based on 100 parts by weight of the prepolymer.

As the photopolymerization sensitizer, various known photosensitizers can be used. Examples of such substances include benzoin, benzoin alkyl ethers such as benzoin ethyl ether, benzoin n-propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-2-phenylacetophenone, benzophenone, benzyl , diacetyl, diphenyl sulfide, eosin, thioene 9,1o-anthraquinone, Michler's ketone, etc.
〇 Thermal polymerization inhibitors that can be used in the range of 10% by weight include hydroquinone, mono-tert-butylhydroquinone, benzoquinone, 2.5-diphenyl-p-benzoquinone, picric acid, di-p-fluorophenylamine, p -methquinphenol, 2,6-di-tert-butyl-p
- If you give something like cresol, it will cause a tinge. It is desirable that these thermal polymerization inhibitors prevent thermal polymerization reactions (dark reactions). Therefore, the amount of thermal polymerization inhibitor added is 0.005% based on the total amount of prepolymer and crosslinking agent.
It is desirable that the amount is in the range of 5.0 parts by weight.

In addition, compositions comprising polyenes, polythiols, and photosensitizers as disclosed in Japanese Patent Publication No. 46-29525 are also useful.

A method of photosensitively forming the relief 3 on the transparent substrate 2 using the above-mentioned materials will be described later.

Relief 3 is molded using raw materials other than photosensitive resin,
When configuring the light shielding screen 1 by bonding this to the transparent substrate 2, or when forming the transparent substrate 2 of the relief 3 of the light shielding screen 1.
Adhesives used when bonding the transparent substrate 4 on the opposite side of the substrate include nitrile comb, polyester thread, cyanoacrylate, epoxy, vinyl acetate copolymer, synthetic rubber, and acrylic. Examples include chlorograne yarn, urethane yarn, and silane compound yarn.

These are appropriately selected and used depending on the material of the relief used and the type of transparent plate. Among these, urethane-based, polyester-based, and epoxy-based preservatives are preferred, and silane compounds are particularly preferred when a glass plate is used as the transparent substrate.

An example of a method for manufacturing a light-shielding screen according to the present invention using a photosensitive resin will be described below.

A photosensitive resin composition containing a surface matting agent is placed on the non-glare treated side of a transparent substrate which has been subjected to anti-glare treatment to a predetermined gloss r= on one side, and a transparent part and a non-transparent part are further applied thereon. The transparent image carrier 111 is laminated with a transparent image J-μ having straight stripes or a checkered pattern in this order.
The photosensitive resin composition (hereinafter referred to as the composition) containing the transparent image carrier and the surface matting agent is then removed, and the unexposed areas of the photosensitive resin composition (hereinafter referred to as the composition) are removed. The resulting molded body is dyed with a dye to obtain a light-shielding screen.

This will be explained in more detail. As a method for applying the transparent substrate, the composition and the transparent image carrier, the composition is coated or coated with the composition on a predetermined surface of the transparent substrate to a thickness of 40 to 2000μ. After adhering 1, for example, a negative film for photolithography using a silver salt image, a plastic film or sheet that is substantially transparent to active light S, transparent glass, cellophane, etc., from the straight line of the transparent and non-transparent parts. The width of the transparent part is preferably 20 to 5 mm.
00μ.

A transparent image support having a non-transparent area width of 20 to 1000 microns is placed in close contact with the composition. Alternatively, on the contrary, the composition layer may be laminated on the transparent image layer, and then the transparent substrate may be arranged in a dense layer. They may be arranged with a gap and a liquid or molten composition may be injected into the gap.

When irradiating with active light rays such as arc lamps, mercury lamps, xenon lamps, ultraviolet fluorescent lamps, and sunlight, it is preferable to place the composition and the transparent image carrier in close contact from the viewpoint of image reproducibility. 1 Even if the composition is liquid or solid, if the surface is sticky, a transparent plastic film such as a polypropylene film, a polycarbonate film, a polyethylene terephthalate film, etc. is used between the transparent image carrier and the composition. Providing an intermediate layer such as , acetyl cellulose film, polyvinyl alcohol film, or cellophane is effective because it has the effect of protecting the transparent image carrier and preventing adhesion between the transparent image carrier and the composition layer after irradiation. In addition, as a method for removing the unexposed areas of the image-forming exposure composition, a known method can be used, for example, after the image-forming exposure has been completed and the transparent image carrier has been removed, the plate is placed on a drum with the plate surface to be developed outside. Alternatively, attachment to a flat plate can be carried out by spraying a developer onto the plate surface G to wash out the non-exposed areas, or by dipping a brush into the developer and removing the non-exposed areas with the brush.

The method for dyeing the composition (based on dyeing agent) is to immerse it in a heated solution of a dyeing agent, such as a cationic dye, disperse dye, acid dye, reactive dye, metal-containing dye, etc., and then wash and dry it. This can be done by At this time, since the transparent substrate may be dyed depending on the type of the transparent substrate, it is necessary to select a staining agent.

A method of bonding another transparent substrate to the side opposite to the transparent substrate of the relief of the light-shielding screen obtained in this way is to apply an adhesive to a predetermined part of the surface of the other transparent substrate, or to apply an adhesive to the edge of the relief. An example of a method is to apply an adhesive to [ih] and heat-press it with a laminator.

In the external light anti-reflection light-shielding screen according to the present invention, the surface located farthest from the surface of the cathode ray tube, that is, the surface of the transparent substrate viewed by the viewer, is subjected to anti-glare treatment so that the glossiness falls within a specific range. Furthermore, by adopting a structure in which a colored matte relief is formed in a uniform pattern on the crown tube side, it is possible to prevent unevenness in the image, as shown in Figure 7. , can extremely effectively prevent specular reflection of external light on the surface of the transparent substrate,
The light beams transmitted through this transparent substrate are also absorbed and scattered by the surface of the colored matte relief.

This prevents the contrast of characters and images on the cathode ray tube from decreasing, even in places where strong light rays are dim, such as outdoors.
It is also possible to prevent ghost phenomena caused by reflections from the side surfaces of the relief. This effect is further strengthened and the relief is protected by further providing a transparent substrate on the cathode ray tube side of the relief, and preferably applying an anti-glare treatment to the surface closest to the cathode ray tube. Moreover, if a photosensitive resin is used for the relief of the light-shielding screen according to the present invention, it can be easily manufactured without requiring complicated steps.

Example 1 Propylene glycol, diethylene glycol.

Adipic acid, fumaric acid, isophthalic acid in molar ratio 0.12
10.3810.2410.14/[J, unsaturated polyester resin obtained by condensation at a ratio of 12 (acid value 30) 1
00 parts, diethylene glycol dimethacrylate 12
part, 60 parts of tetraethylene glycol dimethacrylate, 12 parts of 2-hydroxyethyl methacrylate, part of diacetone acrylamitro, 2 parts of benzoin isobutyl ether, and 0.06 part of 4-ter7-arybutylcatechol were added to form a photosensitive resin composition. A photosensitive raw resin composition containing a matting agent was prepared by adding 5 parts of fine powder paste to this composition.

Next, the above photosensitive resin composition containing a matting agent is poured onto the non-glare treated side of an acrylic plate, one side of which has been anti-glare treated to a predetermined 60 degree specular gloss, and an adhesive (Atcoat) is poured onto this composition. AD-335A + Curing agent A, 1) Ii”J (
(manufactured by Toyo Morton Co., Ltd.)] 1) ET film coated with the resin composition was covered so as to come into contact with the resin composition at 7°C. On this occasion,
The thickness of the resin was adjusted to 200μ using a swazer. 1) ET film with 200μ of unethical brightness
A negative film having a striped pattern with a transparent area of 10.0 microns and a polypropylene film with a thickness of 20 microns were superimposed. The negative film side of the thus assembled assembly was exposed to light for 80 seconds through a 3KW ultra-high pressure mercury lamp to photocure it into a striped pattern. The light source distance at that time was approximately 90 cm. After the end of Tsuyumaru,
After removing the negative film and PET film,
The resin composition in the non-exposed areas was removed by spraying a weak alkaline solution of Liquid 1 at a temperature of 40 to 45°C.

After washing the unexposed plate with water, post-exposure (irradiation amount: 1DOOmJ/cm 1 ) and drying (50°C).

10 minutes) and then heated to 70-80°C.
Weight department dispersion dyeing $4' (Lanyl Black f3
G (Sumitomo Chemical, further washed with water and dried (50℃, 10
A light-shielding screen/screen was obtained in which a photosensitive resin relief was provided on an acrylic plate.

Example 2 An adhesive [Atocoat AJJ-335A-1-Curing Agent Ai) FJ (manufactured by Toyo Morton Co., Ltd.)] was applied to the relief end face of a light shielding screen obtained in the same manner as in Example 1.

Lamy the glass plate so that one side of the glass plate is in contact with the adhesive layer.
- A heat pressure N (temperature of about 120°C) was applied to obtain a light-shielding screen in which a transparent substrate was further provided on the cathode ray tube side of the relief.

When the light-shielding screens of Examples 1 and 2 were set on a computer display, they had an anti-glare effect, and the contrast of the display did not deteriorate even in the presence of strong external light.

Moreover, I did not want to see the phenomenon where the image became blurry.

As described above, the external light reflection prevention light shielding screen according to the present invention has a specific gloss level on the surface viewed by the viewer, and the relief is colored and matte, so that the contrast of the image does not deteriorate even under strong external light. This is valuable in making it easier to view cathode ray tubes, which will be used more and more often under strong IA light.

[Brief explanation of the drawing]

1 to 4 are partially enlarged front views of the external light antireflection light-shielding screen according to the present invention with different arrangement patterns of colored matte reliefs, and FIG. 5 is a sectional view taken along the line X-X in FIG. 6.
FIG. 6 is a cross-sectional view corresponding to FIG. 5 showing an application example of the present invention, and FIG. 7 is an explanatory diagram showing the state of use of the external light reflection prevention light-shielding screen according to the present invention. 1. Light-shielding screen 2...Transparent substrate 2a...Surface 2b of transparent substrate
・・Surface 6 of transparent substrate ・・Relief 4 ・・Transparent substrate 4a ・・Surface Δ of transparent substrate ・
・Cathode ray tube

Claims (1)

[Claims] 1 JIS Z 8741 “Light θ (
The 60 degree specular gloss specified in the "Measurement method" is 20 to 8
An anti-glare treatment is applied to make the surface of the transparent substrate (2) 0.
A light-shielding screen that prevents the reflection of external light and is characterized by the fact that it is provided with a colored matte relief (3).