JP3242201B2 - Perforated screen with sound transmission - Google Patents
Perforated screen with sound transmissionInfo
- Publication number
- JP3242201B2 JP3242201B2 JP11557493A JP11557493A JP3242201B2 JP 3242201 B2 JP3242201 B2 JP 3242201B2 JP 11557493 A JP11557493 A JP 11557493A JP 11557493 A JP11557493 A JP 11557493A JP 3242201 B2 JP3242201 B2 JP 3242201B2
- Authority
- JP
- Japan
- Prior art keywords
- screen
- sound
- hole
- perforated
- perforated screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スクリーンに最適な開
孔を施すことにより、特に音響透過性を向上させた音響
透過性有孔スクリーンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforated screen having a sound-transmitting property in which the screen is perforated optimally to improve the sound-transmitting property.
【０００２】[0002]
【従来の技術】従来から知られている有孔スクリーン
（背後にスピーカを設置し、音声を再生することを目的
としたもの）は、直径１．０〜１．４ｍｍ程度の開孔
を、４．０〜６．０ｍｍ程度の間隔で孔列が９０°で交
差するように施したものであった。そのため、音響透過
性が不十分な上、近傍から目視した場合には孔が知覚で
き、無孔スクリーンと比較して画質の劣化を生じること
があった。2. Description of the Related Art A conventionally known perforated screen (for the purpose of installing a speaker behind and reproducing sound) has an aperture having a diameter of about 1.0 to 1.4 mm. The holes were arranged so as to intersect at 90 ° at intervals of about 0.0 to 6.0 mm. For this reason, the sound transmittance is insufficient, and a hole can be perceived when viewed from the vicinity, and the image quality may be deteriorated as compared with a non-porous screen.
【０００３】[0003]
【発明が解決しようとする課題】このように、従来の有
孔スクリーンは音響透過性が不十分な上、孔径が大きい
ために、近傍から見た場合に画質の劣化を生じる場合が
ある、という欠点がみられた。As described above, the conventional perforated screen has insufficient sound transmission and has a large hole diameter, which may cause deterioration in image quality when viewed from the vicinity. Disadvantages were seen.
【０００４】よって本発明の目的は上述の点に鑑み、前
方投射型の有孔スクリーンを構成するにあたり、スクリ
ーンに最適な開孔を施し、かつ、膜厚を薄くすることに
より、高い音響透過性が得られるようにし、もって、ス
クリーン背後に設置したスピーカからの再生音の透過に
よる劣化を極めて少なくした音響透過性有孔スクリーン
を提供することにある。In view of the foregoing, it is an object of the present invention to provide a front projection type perforated screen by forming an optimal aperture in the screen and reducing the film thickness to achieve high sound transmission. Therefore, it is an object of the present invention to provide a perforated sound-permeable screen that has extremely reduced deterioration due to transmission of reproduced sound from a speaker installed behind the screen.
【０００５】[0005]
【課題を解決するための手段】かかる目的を達成するた
めに、本発明に係る有孔スクリーンは、孔径を約０．６
ｍｍφ（従来の約３／５），孔間隔を約２．０ｍｍ（従
来の約１／２），孔列を約６０°交差にし、膜厚を約１
２ｍｉｌ（約０．３０ｍｍ，従来の約２／３））にした
ものである。In order to achieve this object, a perforated screen according to the present invention has a hole diameter of about 0.6.
mmφ (about 3/5 of the conventional), the hole interval is about 2.0 mm (about 1/2 of the conventional), the hole row crosses about 60 °, and the film thickness is about 1
2 mil (about 0.30 mm, about 2/3 of the conventional size).
【０００６】[0006]
【作用】本発明の上記構成によれば、音響透過性及び画
質の向上が図られ、スクリーン背後に設置したスピーカ
からの再生音の透過による劣化を極めて少なくすること
ができる。その結果、映像と音像が良く一致した状態で
視聴することができ、臨場感を高めることが可能とな
る。According to the above construction of the present invention, the sound transmission and the image quality are improved, and the deterioration due to the transmission of the reproduced sound from the speaker installed behind the screen can be extremely reduced. As a result, it is possible to view the video in a state where the video and the sound image are well matched, and it is possible to enhance a sense of reality.
【０００７】[0007]
【実施例】以下、本発明の実施例を詳細に説明する。Embodiments of the present invention will be described below in detail.
【０００８】図１は、従来のスクリーンと本発明に係る
スクリーンについて、スクリーンの孔径，孔間隔，孔
列，膜厚の比較ならびに音響エネルギーの流れを示した
説明図である。FIG. 1 is an explanatory diagram showing a comparison between the screen diameter, the hole interval, the hole array, the film thickness, and the flow of acoustic energy between the conventional screen and the screen according to the present invention.
【０００９】この図１から明らかなように、従来の有孔
スクリーンと比較して、孔径および孔間隔を小さく、孔
列を６０°交差に改良することにより、仮に同じ開孔率
（単位面積当たりの孔面積の比率）であっても、孔の周
辺効果によって、より多くの音響エネルギーを透過させ
ることができる。また、孔列を６０°交差にすることに
より、同じ孔間隔でも約１５％開孔率を高くすることが
できる。As can be seen from FIG. 1, by reducing the hole diameter and the hole interval and improving the hole row to a 60 ° intersection as compared with the conventional perforated screen, the same opening ratio (per unit area) is assumed. ), More acoustic energy can be transmitted by the peripheral effect of the hole. Further, by making the hole rows cross at 60 °, it is possible to increase the opening ratio by about 15% even at the same hole interval.
【００１０】なお、同じ膜厚のままで孔径を小さくし過
ぎると、その孔中の空気粘性により音響透過性が低下す
ることになるが、孔径および孔間隔を小さくするのと同
時に、膜厚を薄くすることで、かかる不都合を解決する
ことができる。If the hole diameter is made too small while maintaining the same film thickness, the sound permeability will decrease due to the viscosity of the air in the holes. Such inconvenience can be solved by reducing the thickness.
【００１１】また、膜厚を薄くすることにより、膜自体
を透過するエネルギーの損失を小さくすることができる
ので、全体の音響透過性が向上することになる。Further, by reducing the film thickness, the loss of energy transmitted through the film itself can be reduced, so that the overall sound transmittance is improved.
【００１２】図２に、４種類のサンプルによる音響透過
性の測定結果を従来品と比較して示す。本図の縦軸はス
クリーンを設置しない時に対するスクリーン透過音の劣
化度を示している。FIG. 2 shows the results of measurement of the sound transmittance of four types of samples in comparison with the conventional products. The vertical axis of this figure indicates the degree of deterioration of the screen transmitted sound when no screen is installed.
【００１３】この図２から明らかなように，孔径０．６
ｍｍ，孔間隔２．０ｍｍ，孔列６０°交差，膜厚１２ｍ
ｉｌのサンプルＤでは、透過音の劣化度が非常に小さく
なっている（すなわち、音響透過性が非常に高くなって
いる）。As is apparent from FIG.
mm, hole interval 2.0mm, hole row 60 ° intersection, film thickness 12m
In the sample D of il, the degree of deterioration of the transmitted sound is very small (that is, the sound transmittance is very high).
【００１４】従って、開孔加工技術上の限界と、スクリ
ーンとして張り込む際の張力に対応できる薄さの限界か
ら、上記サンプルＤの仕様、あるいは、このサンプルＤ
の仕様にほぼ似かよった仕様が、音響透過性のための最
適値であると考えられる。Therefore, the specification of the sample D or the sample D is limited due to the limit in the hole forming technology and the limit of the thickness that can cope with the tension at the time of sticking as a screen.
The specification almost similar to the specification is considered to be the optimum value for sound transmission.
【００１５】図３は、従来のスクリーンと本発明に係る
スクリーンに関して、スクリーンの孔径，孔間隔と光の
拡散反射効果を比較した説明図である。本図から明らか
なように、開孔端部の拡散効果により光反射特性の指向
特性も改善されることが判る。FIG. 3 is an explanatory diagram comparing the conventional screen and the screen according to the present invention with respect to the hole diameter and the hole interval of the screen and the diffuse reflection effect of light. As is clear from this figure, it is understood that the directional characteristics of the light reflection characteristics are also improved by the diffusion effect at the end of the opening.
【００１６】[0016]
【発明の効果】本発明に係る有孔スクリーンによれば、
従来品に比べてスクリーンの音響透過性を格段に向上
（例えば１０ｋＨｚにおいて約６ｄＢ改善）させること
ができる。According to the perforated screen according to the present invention,
The sound transmittance of the screen can be significantly improved (for example, about 6 dB improvement at 10 kHz) as compared with the conventional product.
【００１７】なお、同じ開孔率であれば開孔を施すこと
による光反射特性（スクリーンゲイン）の減少分は同じ
であり、開孔端部の拡散効果により光反射特性の指向特
性も改善される。If the aperture ratio is the same, the amount of decrease in the light reflection characteristic (screen gain) due to the opening is the same, and the directional characteristic of the light reflection characteristic is also improved by the diffusion effect at the end of the opening. You.
【図１】従来のスクリーンと本発明に係るスクリーンに
ついて、スクリーンの孔径，孔間隔，孔列，膜厚の比較
ならびに音響エネルギーの流れを示した説明図である。FIG. 1 is an explanatory diagram showing a comparison between a screen diameter, a hole interval, a hole array, and a film thickness of a conventional screen and a screen according to the present invention, and a flow of acoustic energy.
【図２】本発明に係る有孔スクリーンの音響透過性測定
結果を示す線図である。FIG. 2 is a diagram showing a result of measuring sound transmittance of a perforated screen according to the present invention.
【図３】従来のスクリーンと本発明に係るスクリーンに
関して、スクリーンの孔径，孔間隔と光の拡散反射効果
を比較した説明図である。FIG. 3 is an explanatory diagram for comparing a conventional screen and a screen according to the present invention with respect to a hole diameter and a hole interval of the screen and a diffuse reflection effect of light.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G03B 21/56 H04R 1/02 103 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G03B 21/56 H04R 1/02 103
Claims (1)
て、、孔径を約０．６ｍｍφ，孔間隔を約２．０ｍｍ，
孔列を約６０°交差，膜厚を約１２ｍｉｌに設定したこ
とを特徴とする音響透過性有孔スクリーン。1. A perforated screen of a front projection type having a hole diameter of about 0.6 mm, a hole interval of about 2.0 mm,
A perforated sound-permeable screen characterized in that the rows of holes intersect at about 60 ° and the film thickness is set at about 12 mil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11557493A JP3242201B2 (en) | 1993-05-18 | 1993-05-18 | Perforated screen with sound transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11557493A JP3242201B2 (en) | 1993-05-18 | 1993-05-18 | Perforated screen with sound transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06332073A JPH06332073A (en) | 1994-12-02 |
| JP3242201B2 true JP3242201B2 (en) | 2001-12-25 |
Family
ID=14665945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11557493A Expired - Fee Related JP3242201B2 (en) | 1993-05-18 | 1993-05-18 | Perforated screen with sound transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3242201B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4630436B2 (en) * | 2000-09-19 | 2011-02-09 | 株式会社ジャムコ | Projection screen |
| JP5666784B2 (en) * | 2009-03-09 | 2015-02-12 | 株式会社巴川製紙所 | Total sound transmission plate, hard screen and sound transmission amount adjustment plate using the same |
| US10719004B2 (en) * | 2016-11-26 | 2020-07-21 | Konica Minolta Planetarium Co., Ltd. | Dome screen |
| WO2022042515A1 (en) * | 2020-08-24 | 2022-03-03 | 青岛海信激光显示股份有限公司 | Sound-producing screen and projection television |
-
1993
- 1993-05-18 JP JP11557493A patent/JP3242201B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06332073A (en) | 1994-12-02 |
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