JPH04156528A - Fresnel lens sheet, manufacture thereof, and transmission type projection television - Google Patents
Fresnel lens sheet, manufacture thereof, and transmission type projection televisionInfo
- Publication number
- JPH04156528A JPH04156528A JP2282117A JP28211790A JPH04156528A JP H04156528 A JPH04156528 A JP H04156528A JP 2282117 A JP2282117 A JP 2282117A JP 28211790 A JP28211790 A JP 28211790A JP H04156528 A JPH04156528 A JP H04156528A
- Authority
- JP
- Japan
- Prior art keywords
- fresnel lens
- lens sheet
- resin film
- reflection
- light
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000010408 film Substances 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 7
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 239000003989 dielectric material Substances 0.000 abstract description 2
- 238000010894 electron beam technology Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 229910001635 magnesium fluoride Inorganic materials 0.000 abstract 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、透過型プロジェクションテレビに用いられる
高性能のフレネルレンズシートに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high performance Fresnel lens sheet used in a transmission projection television.
従来の技術
透過型プロジェクションテレビのスクリーンに用いられ
る透過型スクリーンとしては、明るい映像が広い視野範
囲で得られることが要求されている。このため透過型ス
クリーンの構成は特開昭６３−２６５２３５号公報等で
開示されているように、投写光を可視化するための光拡
散剤を透過型スクリーンの基材中に混入し、更に投写光
の拡散に異方性を持たせて要求される視野範囲における
映像の輝度を高めるために透過型スクリーンの表面にレ
ンチキュラレンズを形成させている。加えて、投写光に
対するフィールドレンズの作用を持ったフレネルレンズ
と組み合わせて、透過型スクリーン周辺部の輝度低下を
抑制することが併せて行われている。2. Description of the Related Art Transmissive screens used in transmissive projection television screens are required to be able to provide bright images over a wide viewing range. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 63-265235, etc., the structure of a transmission screen is such that a light diffusing agent is mixed into the base material of the transmission screen to make the projected light visible, and the projection light is Lenticular lenses are formed on the surface of the transmissive screen in order to provide anisotropy to the diffusion of light and increase the brightness of images in the required viewing range. In addition, a Fresnel lens that has the effect of a field lens on projected light is combined to suppress a decrease in brightness at the periphery of a transmissive screen.
発明が解決しようとする課題
このような透過型スクリーンは第５図に示すように複数
枚のシート、すなわち１枚のフレネルレンズシート１６
と１枚のレンチキュラレンズシート４から構成されてい
るために少なくとも４面の空気との界面が発生する。界
面では投写器５からの投写光６の反射による光量低下の
ほかに、界面反射による迷光が発生し、いわゆるゴース
ト像が形成されるなど、画像の品位が低下された映像が
観察者７によって観察されるという課題が発生する。第
６図はフレネルレンズシート１６の投写光６の入射側で
ある平面側の界面１７と射出側の界面であるフレネルレ
ンズ面１日で発生する迷光２１の様子を示している。投
写光６はフレネルレンズシート１６の入射側界面１７か
らフレネルレンズシート内に入射し、フレネルレンズ面
１日から射出し、所望の投写光１９となってＬ／ン千キ
ュラレンズシ一トへと進む。このとき、フレネルレンズ
面１８で界面反射が発生し、反射光２０が生ずる。反射
光２０は図示の光路を進み、フレネルレンズシートの入
射側の界面１７に再び入射する。Problems to be Solved by the Invention Such a transmission screen consists of a plurality of sheets, ie, one Fresnel lens sheet 16, as shown in FIG.
and one lenticular lens sheet 4, there are at least four interfaces with air. At the interface, in addition to the reduction in light intensity due to reflection of the projection light 6 from the projector 5, stray light is generated due to interface reflection, and a so-called ghost image is formed, resulting in an image with degraded image quality being observed by the viewer 7. The problem arises that FIG. 6 shows the appearance of stray light 21 generated in one day between the plane-side interface 17 of the Fresnel lens sheet 16 on which the projected light 6 enters and the Fresnel lens surface that is the exit-side interface. The projected light 6 enters into the Fresnel lens sheet from the entrance side interface 17 of the Fresnel lens sheet 16, exits from the Fresnel lens surface 1, becomes the desired projected light 19, and advances to the L/n 1,000-degree lens sheet. At this time, interface reflection occurs on the Fresnel lens surface 18, and reflected light 20 is generated. The reflected light 20 travels along the illustrated optical path and enters the interface 17 on the incident side of the Fresnel lens sheet again.
ここで、反射光２０は２分され、屈折され透過する光線
２２と反射され迷光２１とになる。迷光２１は所望の投
写光１９とフレネルレンズシートからの射出位置が異な
るため、ゴースト像あるいは２重像と呼ばれる画像品位
を低下させる状態が生ずる。Here, the reflected light 20 is divided into two parts, a light ray 22 that is refracted and transmitted, and a stray light 21 that is reflected. Since the stray light 21 has a different exit position from the Fresnel lens sheet than the desired projection light 19, a condition called a ghost image or double image that deteriorates the image quality occurs.
課題を解決するための手段
本発明のフし４ルレンズンートの要旨とする手段は、透
過型スクリーンを構成するフレネルレンズソートにおい
て、フレネルレンズを片面に形成したフレネルレンズシ
ートの平面側に反射防止処理を形成した樹脂フィルムを
非反射防止処理側を対向させ、貼付したフレネルレンズ
シートを用いて、透過型スクリーンを構成することにあ
る。Means for Solving the Problems The main feature of the four lens sheet of the present invention is to apply an anti-reflection treatment to the flat side of a Fresnel lens sheet, in which a Fresnel lens is formed on one side, in a Fresnel lens sort constituting a transmission screen. A transmissive screen is constructed by using a Fresnel lens sheet attached to the formed resin film with the non-reflection treated side facing each other.
作用
本発明は上記した構成すなわち、片面にフレネルレンズ
を形成したフレネルレンズノートの平面側に反射防止処
理を形成した樹脂フィルＪ、を貼付したフレネルレンズ
ノートを用いてｉ！ｉｉ！ｉ型スクリーメスクリーンた
め、投写器からの投写光がフレネルレンズシートの平面
側で界面反射を生じなくなり、迷光の発生を抑制し画像
品位の高い映像を得ることができる。Function The present invention uses a Fresnel lens notebook having the above-mentioned structure, that is, a Fresnel lens notebook having a Fresnel lens formed on one side, and a resin film J having anti-reflection treatment applied to the flat side of the notebook. ii! Because of the i-type scream screen, the projected light from the projector does not cause interface reflection on the flat side of the Fresnel lens sheet, suppressing the generation of stray light and providing high-quality images.
実施例
以下、本発明の一実施例について図面を参照εて詳細に
説明する。EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図は本発明の反射防止処理を施したフレネルレンズ
シートを用いた透過型スクリーンの構成図である。透過
型スクリーン１は本発明になる反射防止処理を施した樹
脂フィルム２の非反射防止処理側をフレネルレンズシー
トの平面側に貼付したフレネルレンズシート３と光拡散
特性を有する拡散剤を混練した樹脂材料を基材としたレ
ンチキュラレンズシート４から構成されている。投写器
５からの投写光６は、これら構成要素からなる透過型ス
クリーンで可視化され観察者７によって観察される。FIG. 1 is a configuration diagram of a transmission screen using a Fresnel lens sheet subjected to antireflection treatment according to the present invention. The transmission screen 1 is made of a Fresnel lens sheet 3 in which the non-antireflection treated side of the resin film 2 subjected to antireflection treatment according to the present invention is attached to the flat side of a Fresnel lens sheet, and a resin made by kneading a diffusing agent having light diffusion properties. It is composed of a lenticular lens sheet 4 made of a material as a base material. Projected light 6 from the projector 5 is visualized by a transmission screen made up of these components and observed by an observer 7.
第２図は反射防止処理を施した樹脂フィルム２を貼付し
たフレネルレンズシート３に入射した投写光が、フレネ
ルレンズシートの出射側のフレネルレンズ面８で反射さ
れた様子を示している。反射光９は、フレネルレンズシ
ートの入射面１０側に戻るが、入射面側に反射防止処理
を施した樹脂フィルム２が貼付されているので、再度フ
レネルレンズ面側に反射される迷光１１の強度は小さく
再生画像に与える影響は小さい。これによって、映像の
品位を従来に比して高めることができる。FIG. 2 shows how the projection light incident on the Fresnel lens sheet 3 to which the anti-reflection treated resin film 2 is attached is reflected by the Fresnel lens surface 8 on the exit side of the Fresnel lens sheet. The reflected light 9 returns to the incident surface 10 side of the Fresnel lens sheet, but since the resin film 2 with anti-reflection treatment is attached to the incident surface side, the intensity of the stray light 11 reflected back to the Fresnel lens surface side is reduced. is small and has little effect on the reproduced image. As a result, the quality of the video can be improved compared to the conventional technology.
反射防止処理を施した樹脂フィルムとフレネルレンズシ
ートとの接合は、接着剤による接合または熱接合によっ
て実施することができる。また、反射防止処理を施した
樹脂フィルムとフレネルレンズシートの屈折率は同じで
あると、これら接合面での界面反射を発生させないこと
ができる。例えば、フレネルレンズシートの基材がアク
リル樹脂であれば、樹脂フィルムの基材はアクリル樹脂
が望ましい。The antireflection-treated resin film and the Fresnel lens sheet can be bonded by adhesive or thermal bonding. Furthermore, if the antireflection-treated resin film and the Fresnel lens sheet have the same refractive index, interfacial reflection at their joint surfaces can be prevented. For example, if the base material of the Fresnel lens sheet is an acrylic resin, the base material of the resin film is preferably an acrylic resin.
第３図は、フレネルレンズソートに貼付する本発明にな
る反射防止処理を施した樹脂フィルムの製造方法を示し
ている。樹脂フィルムの元材料は、供給側ローラ１２か
ら巻取り側ローラ１３に移動し、巻き取られる。この時
同時にハース１５内の酸化シリコン（Ｓ ＋ ０２ ）
あるいはフッ化マグネシウム（ＭｇＦ２）等の誘電体材
料１４は電子線あるいは抵抗加熱（図示せず）によって
、蕉発され樹脂フィルム上に蒸着され誘電体薄膜による
反射防止膜が形成される。このように反射防止処理を樹
脂フィルムに形成することによって、連続で加工が行う
ことができ、低コストで実現できる。FIG. 3 shows a method for manufacturing a resin film subjected to antireflection treatment according to the present invention to be applied to a Fresnel lens sort. The raw material of the resin film moves from the supply roller 12 to the winding roller 13 and is wound up. At this time, silicon oxide (S + 02) inside the hearth 15
Alternatively, a dielectric material 14 such as magnesium fluoride (MgF2) is evaporated using an electron beam or resistance heating (not shown) and then deposited on a resin film to form an antireflection film of a dielectric thin film. By forming the antireflection treatment on the resin film in this way, processing can be performed continuously and can be realized at low cost.
更に、直接フレネルレンズシートに反射防止膜を蒸着し
ないので、大きな蒸着装置を必要としないので、装置の
コストも低くすることができる。Furthermore, since the antireflection film is not deposited directly on the Fresnel lens sheet, a large deposition device is not required, and the cost of the device can be reduced.
第４図は、本発明の反射防止処理を施した樹脂フィルム
を貼付したフレネルレンズシートを用いた透過型スクリ
ーンｌと投写器５および投写光路折り曲げ用ミラー２３
からなる透過型プロジェクションテレビ２４の概略構成
を示す。迷光が発生しないので、高画質の映像を得るこ
とができる。FIG. 4 shows a transmission screen l using a Fresnel lens sheet pasted with a resin film treated with the antireflection treatment of the present invention, a projector 5, and a mirror 23 for bending the projection optical path.
2 shows a schematic configuration of a transmission type projection television 24 consisting of the following. Since there is no stray light, high-quality images can be obtained.
発明の効果
以上述べたように、本発明によれば、高品位な映像を再
生することが可能な透過型スクリーンを構成するフレネ
ルレンズシートを実現することが可能となり、産業上の
価値は大である。Effects of the Invention As described above, according to the present invention, it is possible to realize a Fresnel lens sheet that constitutes a transmission screen that can reproduce high-quality images, and it has great industrial value. be.
第１図は本発明の反射防止処理を施した樹脂フィルムを
貼付したフレネルレンズシートを用いた透過型スクリー
ンの構成図、第２図は本発明になる反射防止処理を施し
た樹脂フィルムを貼付したフレネルレンズシート中にお
ける投写光の挙動を示す断面図、第３図は透過型スクリ
ーンを構成するフレネルレンズシートに貼付する樹脂フ
ィルムに反射防止処理を施す製造方法を示す工程概略図
、第４図は本発明になる反射防止処理を施した樹脂フィ
ルムを貼付したフレネルレンズシートを構成要素とした
透過型スクリーンを用いた透過型プロジェクションテレ
ビの概略構成を示す断面図、第５図は従来の透過型スク
リーンの構成図、第６図は従来のフレネルレンズシート
中における投写光の挙動を示す断面図である。
１・・・・・・透過型スクリーン、２・・・・・・反射
防止処理を施した樹脂フィルム、３・・・・・・フレネ
ルレンズシート。
代理人の氏名 弁理士小鍜治明 ほか２名イ
第２図
５コ一
第３図Figure 1 is a configuration diagram of a transmission type screen using a Fresnel lens sheet to which a resin film treated with the antireflection treatment of the present invention is attached, and Figure 2 is a diagram showing the structure of a transmission screen using a Fresnel lens sheet attached with the resin film treated with the antireflection treatment of the present invention. A cross-sectional view showing the behavior of projected light in a Fresnel lens sheet, Figure 3 is a process schematic diagram showing a manufacturing method for applying anti-reflection treatment to a resin film attached to a Fresnel lens sheet constituting a transmission screen, and Figure 4 is a cross-sectional view showing the behavior of projected light in a Fresnel lens sheet. A sectional view showing a schematic configuration of a transmission projection television using a transmission screen comprising a Fresnel lens sheet attached with an anti-reflection treated resin film according to the present invention. FIG. 5 shows a conventional transmission screen. FIG. 6 is a cross-sectional view showing the behavior of projected light in a conventional Fresnel lens sheet. 1...Transmissive screen, 2...Resin film subjected to antireflection treatment, 3...Fresnel lens sheet. Name of agent: Patent attorney Haruaki Ogata and two others Figure 2 Figure 5 Figure 3
Claims (3)
レネルレンズを片面に形成したフレネルレンズシートの
平面側に前記樹脂フィルムの非反射防止処理側を対向さ
せ、貼付したフレネルレンズシート。(1) A Fresnel lens sheet in which an anti-reflection treatment is formed on one side of a resin film, and a Fresnel lens sheet is attached with the non-reflection treatment side of the resin film facing the flat side of a Fresnel lens sheet in which a Fresnel lens is formed on one side.
反射防止処理をせしめたフレネルレンズシートの製造方
法。(2) A method for manufacturing a Fresnel lens sheet in which a dielectric thin film is deposited on one side of a resin film to provide antireflection treatment.
た透過型プロジェクションテレビ。(3) A transmission type projection television using the Fresnel lens sheet according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2282117A JPH04156528A (en) | 1990-10-19 | 1990-10-19 | Fresnel lens sheet, manufacture thereof, and transmission type projection television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2282117A JPH04156528A (en) | 1990-10-19 | 1990-10-19 | Fresnel lens sheet, manufacture thereof, and transmission type projection television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04156528A true JPH04156528A (en) | 1992-05-29 |
Family
ID=17648352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2282117A Pending JPH04156528A (en) | 1990-10-19 | 1990-10-19 | Fresnel lens sheet, manufacture thereof, and transmission type projection television |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04156528A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5676804A (en) * | 1994-09-13 | 1997-10-14 | Sharp Kabushiki Kaisha | Method for fabricating fresnel lenses by selective application and removal of films on lens surfaces |
| JP2005107044A (en) * | 2003-09-29 | 2005-04-21 | Konica Minolta Holdings Inc | Fresnel lens for display |
| JP2014191285A (en) * | 2013-03-28 | 2014-10-06 | Shimadzu Corp | Rear projection type display apparatus and fresnel lens used for the same |
-
1990
- 1990-10-19 JP JP2282117A patent/JPH04156528A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5676804A (en) * | 1994-09-13 | 1997-10-14 | Sharp Kabushiki Kaisha | Method for fabricating fresnel lenses by selective application and removal of films on lens surfaces |
| JP2005107044A (en) * | 2003-09-29 | 2005-04-21 | Konica Minolta Holdings Inc | Fresnel lens for display |
| JP2014191285A (en) * | 2013-03-28 | 2014-10-06 | Shimadzu Corp | Rear projection type display apparatus and fresnel lens used for the same |
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