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Projection screen

一种投影屏、光扩散的技术，应用在投影屏领域，能够解决画面暗等问题，达到宽视野角的效果

Active Publication Date: 2018-10-23
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned conventional rear projection screen, the problem generally found is that the screen is dark, and moiré fringes caused by pitches are likely to occur on the screen.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0418] 1. Synthesis of low refractive index polymerizable compound (B) component

[0419] In the container, 1 mole of polypropylene glycol (PPG) with a weight average molecular weight of 9,200, 2 moles of isophorone diisocyanate (IPDI) and 2 moles of 2-hydroxyethyl methacrylate (HEMA) are accommodated Then, it was made to react according to the conventional method, and the polyether urethane methacrylate with the weight average molecular weight of 9,900 was obtained.

[0420] In addition, the weight average molecular weight of polypropylene glycol and polyether urethane methacrylate is the polystyrene conversion value measured by gel permeation chromatography (GPC) under the following conditions.

[0421] ・GPC measuring device: HLC-8020 manufactured by Tosoh Co., Ltd.

[0422] ・GPC column: manufactured by Tosoh Co., Ltd. (listed below in order of passage)

[0423] TSK guard column HXL-H

[0424] TSK gel GMHXL(×2)

[0425] TSK gel G2000HXL

[0426] ・Measurement solvent: Te...

Embodiment 2

[0465] In embodiment 2, such as Figure 11 As shown in (a), as the light-diffusion control plate, laminated in order from the side of the soda glass plate is used. Figure 12 Light diffusion control film (ID: none, PD: none) shown in (a) to (b) having a column structure only, Figure 8 Light diffusion control film (ID: ⇔, PD: →) with a louver-column structure shown in (a) to (b), the same light diffusion control film (ID: ⇔, PD: ←), the same light diffusion A rear projection screen was produced and evaluated in the same manner as in Example 1 except for the laminate obtained by controlling the film (ID:•, PD:•). The results obtained are shown in Figure 11 (b).

[0466] It should be stated that for Figure 12 The light-diffusion control films shown in (a) to (b) having only the column structure do not perform the first ultraviolet irradiation when manufacturing the light-diffusion control film, and irradiate the second ultraviolet light without laminating the release film....

Embodiment 3

[0468] In embodiment 3, such as Figure 13 As shown in (a), as the light-diffusion control plate, laminated in order from the side of the soda glass plate is used. Figure 14 The shown light diffusion control film (ID: ⇔, PD: →) with a curved louver-column structure, the same light diffusion control film (ID: ⇔, PD: ←), Figure 8 (a)~(b) The laminated body obtained by the light-diffusion control film (ID: ●, PD: ●) having a louver-column structure shown in (b) was produced in the same manner as in Example 1. Cast and comment. The results obtained are shown in Figure 13 (b).

[0469] It should be stated that for Figure 14 In the shown light diffusion control film having a curved louver-column structure, when preparing the composition for light diffusion control film, a benzotriazole-based ultraviolet absorber (manufactured by BASF Co., Ltd., TINUVIN It manufactured similarly to Example 1 except 384-2) 0.5 weight part (0.2 weight part with respect to the total quantity (1...

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PUM

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Abstract

Provided is a projection screen which can effectively diffuse incident light coming from a wide angle, despite that the number of laminated sheets of a light diffusion control film is small such as 3to 4, and can thereby provide a wide viewing angle even if the projection screen is applied to a large-sized screen. Disclosed is a projection screen having a light diffusion control plate. The lightdiffusion control plate is formed by laminating a plurality of sheets of a light diffusion control film, and the light diffusion control film is a light diffusion control film having a single light diffusion layer having a first internal structure and a second internal structure sequentially from the lower part along the film thickness direction, wherein the first internal structure is a predetermined louver structure, and the second internal structure is a predetermined columnar structure.

Description

technical field [0001] The present invention relates to projection screens. [0002] In particular, it relates to a projection screen in which light incident from a wide range of angles can be effectively diffused even though the number of laminated sheets of the light diffusion control film is as small as 3 to 4 sheets, thereby even when applied to a large screen A wide viewing angle can also be obtained. Background technique [0003] The rear projection display is also called a rear projection display device, and is a display system in which an image projected by a projector from the rear of the screen is viewed from the front of the screen. [0004] As a transmissive projection screen (hereinafter sometimes referred to as a "rear projection screen") used in the above-mentioned rear projection display, a projection screen obtained by combining a Fresnel lens and a lenticular lens is conventionally known. [0005] However, in the above-mentioned conventional rear projecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/60G02B5/02
CPCG02B5/0236G02B5/0278G03B21/60G03B21/62G03B21/602G02B5/0257
Inventor 草间健太郎片桐麦
Owner LINTEC CORP