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Transmissive type screen

A transmissive screen technology, applied in TV, color TV, projection devices, etc., can solve the problems of non-transmissive screen use, screen opacity, etc., achieve uneven brightness and hot spot improvement, high image brightness, and field of view angle broad effect

Active Publication Date: 2014-11-12
MITSUBISHI PAPER MILLS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the transmissive screens described in Patent Documents 1, 2, 3, 4, etc., the screen itself is opaque, so it cannot be used as the above-mentioned see-through transmissive screen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Using a slide bead coating device, the coating amount of solid content is 18.5g / m 2 A light-diffusing layer coating liquid 1 of the following composition was coated on one side of a transparent polyethylene terephthalate film (haze value 4%) with a thickness of 100 μm, blown with cold air at 10° C., and then Drying was performed by blowing hot air at 50° C. to produce the transmissive screen of Example 1. It should be noted that the void volume was 17 ml / m as measured using a mercury porosimeter (Autopore II 9220 manufactured by Micromeritics Instrument Corporation). 2 . The cross-section of the light-diffusing layer was observed with an electron microscope, and its thickness was measured to be 27 µm, and the porosity calculated from the above value was 64%. In addition, the specific surface area of ​​the light-diffusing particles per unit area of ​​the screen calculated from the average primary particle size and specific gravity is 4.2m 2 / m 2 .

[0094]

[0095...

Embodiment 2

[0108] A transmissive screen of Example 2 was produced in the same manner as in Example 1 except that the light-diffusing layer coating solution 1 of Example 1 was replaced with the following light-diffusing layer coating solution 2 . It should be noted that, according to the same operation as in Example 1, the measured porosity was 52%, and the specific surface area of ​​the light-diffusing particles per unit area of ​​the screen calculated from the average primary particle diameter and specific gravity was 4.2m. 2 / m 2 .

[0109]

[0110] 100 parts of silica dispersion 1 (calculated as silica solid content)

[0111] 60 parts of polyvinyl alcohol

[0112] (saponification degree 88%, average polymerization degree 3500)

[0113] 4 parts boric acid

[0114] 0.3 parts of nonionic surfactant

[0115] (polyoxyethylene alkyl ether)

[0116] Light-diffusing particles 7.2 parts

[0117] (OPTBEADS 500S)

[0118] The total solid content concentration was adjusted to 12% with w...

Embodiment 3

[0120] A transmissive screen of Example 3 was produced in the same manner as in Example 1 except that the light-diffusing layer coating solution 1 of Example 1 was replaced with the following light-diffusing layer coating solution 3 . It should be noted that, according to the same operation as in Example 1, the measured porosity was 49%, and the specific surface area of ​​the light-diffusing particles per unit area of ​​the screen calculated from the average primary particle diameter and specific gravity was 4.2m. 2 / m 2 .

[0121]

[0122] 100 parts of silica dispersion 1 (calculated as silica solid content)

[0123] 70 parts of polyvinyl alcohol

[0124] (saponification degree 88%, average polymerization degree 3500)

[0125] 4 parts boric acid

[0126] 0.3 parts of nonionic surfactant

[0127] (polyoxyethylene alkyl ether)

[0128] Light-diffusing particles 7.6 parts

[0129] (OPTBEADS 500S)

[0130] The total solid content concentration was adjusted to 12% with wat...

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PUM

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Abstract

Provided is a transmissive screen that has an extremely wide viewing angle for viewing images projected from a projector and provides excellent image visibility from both sides of the screen. The present invention relates to a transmissive screen (1) which comprises a light transmissive support body (4) and a light diffusion layer (3) on at least one surface of the light transmissive support body, the light diffusion layer containing light diffusion fine particles (2) and xerogel (8). The present invention relates to the transmissive screen wherein the xerogel contains inorganic fine particles and a resin binder, and the inorganic fine particles are dispersible in the form of agglomerated particles and have a mean primary particle size of 18 nm or less and a mean secondary particle size of 500 nm or less.

Description

technical field [0001] The present invention relates to a transmissive screen for reflecting and visually recognizing an image projected from a projector. Background technique [0002] Today, transmissive screens called rear projection types are gradually replacing the current advertising media such as posters, signs, and billboards. Opposite side for visual identification. In recent years, transmissive screens as digital signage have attracted attention. They do not need to be posted and replaced, and image content can be replaced in real time, and digital content including not only static images but also moving image content can be projected over a large area. [0003] In particular, shop windows and the like often face the roads that customers travel. If the display window can be used as a digital signage in the form of a large screen, it is very useful as an advertising medium. Therefore, there is an increasing demand for so-called transmissive screens for window disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/62H04N5/74
CPCG03B21/62G02B5/0242G02B5/0247G02B5/0278
Inventor 德永幸雄
Owner MITSUBISHI PAPER MILLS LTD
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