JP3093398U - Screen for frameless video - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a screen without a peripheral support frame which can provide a high-brightness and clear image even in daylight as an image screen without overlapping a plurality of members. It is. In particular, the present invention makes the shadow of the unit seam inconspicuous in a large multi-screen image. SOLUTION: An adhesive layer containing a coloring agent is interposed between a high-performance screen sheet member obtained by adding a spherical light diffusing agent having a different refractive index to a transparent plastic material and a light transmitting member. It is. Further, the contrast can be easily adjusted according to the use condition of the screen.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is a screen with a specific configuration that is projected by various video projectors. Regarding clean body.

[0002]

[Prior art]

  Conventionally, the screen members used in video projectors have high brightness and To ensure directivity on the viewing side (the visibility of the image depending on the viewing angle), the lenticular A screen that combines two or more lenses, such as a Ralen lens and a Fresnel lens, and combines them It is used a lot.

[0003]   When these configurations increase in size, measures to prevent deformation of thin screen members and surrounding It has a good sealing performance around the periphery to prevent dust from It is attached.

[0004]   Furthermore, this is a unit that has been enlarged as a rear projection. There is a multi-type screen in which two or more sets are lined up, but there is a frame around the The shadow of the unit seam is generated and the quality is impaired.

[0005]   In addition, a single panel that does not have such a combined configuration of lens sheets is used. As a screen member according to the present invention, a semi-milky color with excellent optical performance as used in the present invention There is also a light diffusing sheet material, but the plate thickness that is usually obtained has a high transparency required for optical performance. At present, the thickness is as thin as 1 mm to 5 mm in order to have an excessively high diffusion rate.

[0006]   In addition, various semi-colored plastic milk sheet materials for conventional lighting covers, etc. Materials, such as screen materials with a small amount of diffusing agent and a matte surface, , Optical performance is inadequate and inferior in viewing directivity, so it cannot be used in daylight. It was a thing.

[0007]

[Problems to be solved by the device]

  Improve light diffusion performance as a screen member for images, and stack multiple members When the image is projected as a single panel body without a There is a directivity.

[0008]   As a screen member, there is no support frame in the periphery by taking advantage of the excellent optical performance for images. Rear projection (rear projection type) and reflective type projection with distinctive design To provide a video screen that can be used for video. Also, with commercially available light diffusion sheet materials It is necessary to adjust the contrast to match the usage conditions.

[0009]   If you have a screen with no peripheral frame, when using it as a large multi-type unit , It is possible to make a large screen where the shadow of the frame is not noticeable on the video screen.

[0010]

[Means for Solving the Problems]

  The present invention includes a transparent plastic containing spherical light diffusing agents having different refractive indexes, Between a screen member made of an effective light diffusion sheet material and a light-transmissive plastic member By interposing a colored adhesive layer between the I will get it.

[0011]   A transparent plastic material which is a base resin of the screen member used in the present invention Means methacrylic resin, polystyrene resin, acrylic monomer and styrene. Copolymerized MS resin, polycarbonate resin or styrene-acrylic resin Examples include tolyl copolymer materials, methacrylic resin with excellent optical properties, and It can be said that MS resin is preferable.

[0012]   A thinner plate thickness of the screen member is preferable in view of the image, but 1.0 to 3 is practically used. ． It is 0 mm.

[0013]   In addition, by adding diffusing agents with different refractive indices to transparent plastics like this There are various sheet-shaped products for the lighting cover, etc. Inorganic barium sulfate, calcium carbonate or Compared with irregularly shaped particles of crushed products such as titanium oxide, spherical particles are remarkably The optical performance is excellent, and the directivity is remarkably bright with a bright image on the video screen for this purpose. An increasing property was observed.

[0014]   In the screen member of the present invention, the difference in refractive index between the transparent plastic and the diffusing agent is 0. ． 01 to 0.10 is preferable, and the addition amount of the diffusing agent depends on the plate thickness and the refractive index. Although adjusted by the difference, it is usually desirable to be 3.0 to 15.0% by weight. ( The refractive index (Nd) here is based on JIS K-7105. )

[0015]   The spherical diffusing agent used in the present invention is not only spherical but also elliptical spherical. As long as it has a small surface area.

[0016]   As the diffusing agent, a molybdenum for heating and melting when making a screen member or for cast polymerization. As long as it is possible to maintain the spherical shape among the nomers, it is usually the same as the above MS resin. Polymers and methacrylic resins that have various refractive indices obtained by cross-linking polymerization by adjusting the mixing ratio , Cross-linked polymerized beads (fine particles) such as polystyrene resin, and further silicone Crosslinked polymer particles of the system are also used. By the way, these are prepared by the usual suspension polymerization method. As a result, spherical fine particles are obtained.

[0017]   The light-transmissive plastic member used in the present invention is the above screen member. Any transparent plastic that has high transparency can be used, A meta-ac which is a hard plastic for large screens that exceed Most preferred is rill resin.

[0018]   The plate thickness of the light transmitting member may be a thickness that does not deform as a frameless image screen, It depends on the size of the screen and the design requirements, but in the present invention, 5.0- 50.0 mm.

[0019]   The lamination method of the present invention, while maintaining the transparency and appearance of both plastic members, It suffices that adhesive strength be obtained, but in this application, the product thickness is 10 mm or less. Since it is easy to adjust the coloring formula above, it is possible to use a transparent synthetic resin system. It is the most preferable because the polymerization type adhesive can be easily and inexpensively produced.

[0020]   The adhesive layer in the present invention is also transparent and needs an adhesive force capable of holding both members. Usually, in order to firmly bond the above materials, an acrylic monomer is mainly used. A divided polymerization adhesive is preferred. In addition, the added colorant will keep the transparency Any adhesive can be used so long as it can be dissolved or dispersed.

[0021]   The image contrast is improved by adding a black colorant to the adhesive, Further, the adhesive is colored according to the external light conditions used for the screen and the indoor brightness. It is a method that can be easily adjusted according to the prescription.

[0022]   The thickness of the colored adhesive layer is preferably 1.0 to 3.0 mm from the viewpoint of lamination processing. Can say

[0023]   As a colorant, it easily dissolves or disperses in the adhesive and does not cause color unevenness. It is mainly a black colorant and may be an ordinary oil-soluble pigment or oil-based dye. Colorant Although the addition amount of this is small for adjusting the contrast of the image, It is adjusted at 10 ppm to 100 ppm depending on the optical characteristics and the thickness of the adhesive layer.

[0024]   The video screen laminate obtained by the configuration of the present invention has a transparent light transmitting portion on the surface side. Because the material is integrated via the adhesive layer, without causing light loss, Moreover, it is possible to obtain deep and clear images.

[0025]   In addition, the frameless image screen of the present invention uses a mirror for reflection together. Compact rear projection system and reflective projection It can also be applied to applications.

[0026]   Furthermore, the surface of the light-transmissive member of the image screen obtained by the present invention is previously exposed to external light. A method of preventing specular reflection due to such a method, for example, coating two or more kinds of vapor-deposited films with different refractive indexes Or a similar method of coating two or more transparent films, Furthermore, by attaching a transparent film that has been subjected to antireflection treatment, it becomes even clearer. The video can be provided.

[0027]

[Embodiment of device]

  First, a screen member having a light diffusing property is dissolved and dispersed by the following formulation. Prepare a syrup-shaped prepolymer and heat-polymerize it to obtain a cast polymer sheet with a thickness of 3 mm. Created.

[0028]   Cast polymerization was performed using two 10 mm glass plates (1000 x 1000 mm). Sequentially from 50 ° C to 100 ° C using a normal oven heating method using a soft gasket It is a method of heating to polymerize and cure.

Methyl methacrylate monomer 100 parts by weight Light diffuser (MS resin crosslinked beads) 10 parts by weight Azobisisobutyronitonil 0.1 parts by weight

[0030] 1.53, average particle size = 5 μ,).

[0031]   The part polymerized with the monomers used here is methacrylic resin, The folding rate is Nd = 1.49. After polymerizing and curing in this way, slowly cool and unravel The resulting product has a high total light transmittance (JIS-K7105) of 78%. It became a half-colored milk sheet.

Next, about 3 kg of an acrylic commercial product was prepared as a polymerization-curable adhesive below. Methyl methacrylate monomer 15 parts by weight Curing agent (accessory accessory) 1.5 parts by weight

[0033]

A commercially available transparent acrylic resin is newly added to the screen member sheet obtained by the above-mentioned cast polymerization method. (Sumitomo Chemical Co., Ltd.) was prepared, and the above-mentioned adhesive was injected with a gasket sandwiched in the same manner as in the above-mentioned polymerization method to carry out lamination adhesion.

[0035]   Polymerization adhesion is cured at room temperature 25 ° C after about 2 hours, and the total plate thickness is 25 mm. A layer-integrated video screen product was obtained. (Fig. 1)

[0036]   This is a projector screen with a size of 900 x 900 mm and Trimin After processing, it was manufactured as a self-supporting image screen as shown in FIG. Frameless video When commercializing as a screen for use, either polish it as it is or There is a method to finish painting.

[0037]   A rear projector is produced by using a general-purpose video projector on the self-supporting screen that was produced. As a result of projection by the injection method (rear projection), the frame is made by the conventional lenticular. Compared with the screen combined with, a clearer image was obtained. .

[0038]

[Effect of device]

  The frameless video screen obtained by the present invention enables the display even in bright daylight. A distinctive independence that a clear image can be obtained and the projected image can be seen on the entire screen Molded screen body became possible.

[0039]   Select a high-performance light diffusing screen member on the market to match the usage conditions and room brightness. By adjusting the coloring formula of the adhesive for lamination together, it is possible to save the cost very cheaply. The result is a frame-free video screen with the desired optimum contrast.

[0040]   Also, this unit can be used as two or more screen units side by side. Since there is no reinforcing member (frame) around the unit in the large J-shaped screen, The shadow is inconspicuous and excellent performance can be obtained.

[Brief description of drawings]

FIG. 1 is a screen for a frameless image of the present invention.

FIG. 2 shows an example of using the rear projection method with the frameless image screen of the present invention.

FIG. 3 is a view showing an example of using a rear projection method using an image reflection mirror by the frameless image screen of the present invention.

FIG. 4 is an example of use of the projector in a reflective type with the frameless image screen of the present invention.

FIG. 5 is an example of the configuration of a rear projection screen that is a combination of a conventional lenticular lens and a Fresnel lens.

FIG. 6 is a conventional video screen with a peripheral frame.

[Explanation of symbols]

1 Screen member (highly diffusive plastic sheet) 2 Colored adhesive layer 3 Light transmitting plastic member 4 Image reflection mirror 5 video projector 6 Screen support 7 Peripheral support frame (conventional member) 8 Lenticular lens sheet 9 Fresnel lens

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[Procedure amendment]

[Submission date] December 19, 2002 (2002.12.
19)

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

Claims (2)

[Scope of utility model registration request] 1. A frame without a frame in which a colored adhesive layer is interposed between a screen member formed by adding a light diffusing agent of spherical particles having different refractive indexes to a transparent plastic material and a light transmissive plastic member. Video screen. 2. A frameless video screen according to claim 1, which further comprises a video reflecting mirror.