JPH06160982A - Transmission screen - Google Patents
Transmission screenInfo
- Publication number
- JPH06160982A JPH06160982A JP4316808A JP31680892A JPH06160982A JP H06160982 A JPH06160982 A JP H06160982A JP 4316808 A JP4316808 A JP 4316808A JP 31680892 A JP31680892 A JP 31680892A JP H06160982 A JPH06160982 A JP H06160982A
- Authority
- JP
- Japan
- Prior art keywords
- light
- screen
- transparent
- lens sheet
- layer
- 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
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は投写型テレビジョン受像
機に用いて有効な透過型スクリーンに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmissive screen which is effective for use in a projection television receiver.
【０００２】[0002]
【従来の技術】従来、透過型スクリーンの構成としては
図６に示すように、フレネルレンズ６４を備えたフレネ
ルレンズシート６１の前面に、レンチキュラーレンズシ
ート６２を重ねて配置した２枚構成のスクリーンが用い
られている。2. Description of the Related Art Conventionally, as a constitution of a transmission type screen, as shown in FIG. 6, a screen having a two-layer structure in which a lenticular lens sheet 62 is superposed on a front surface of a Fresnel lens sheet 61 having a Fresnel lens 64 is used. It is used.
【０００３】前記レンチキュラーレンズシート６２は、
スクリーン基材中にガラスや高分子部材からなる光拡散
性微粒子６８（以下拡散材と言う）が混入されるととも
に、両面にシリンドリカル状のレンチキュラーレンズ６
５，６６を配設している。さらに、入射光側レンチキュ
ラーレンズ６５の非集光部に突起状の外光吸収層６７
（以下ブラックストライプと言う）を所定ピッチの縞状
に形成し、外光によるコントラストの低下を防いでい
る。The lenticular lens sheet 62 is
Light diffusing fine particles 68 (hereinafter referred to as a diffusing material) made of glass or a polymer member are mixed in the screen base material, and the cylindrical lenticular lens 6 is provided on both sides.
5, 66 are arranged. Further, a projection-shaped external light absorption layer 67 is formed on the non-light-condensing portion of the incident light side lenticular lens 65.
(Hereinafter, referred to as black stripe) is formed in a striped pattern having a predetermined pitch to prevent deterioration of contrast due to external light.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記のよ
うな従来の構成のレンチキュラーレンズシート６２にお
いては、画像を結像させる目的や垂直視野角拡大のため
に、ガラスビーズやポリマービーズ等の光拡散材６８が
混入されており、この光拡散材のために入射光の一部が
図７の入射光線１３ａに示すように迷光となり解像力の
劣化や出射光の光量ロスとなり明るさの低下を起こすと
いう問題を有している。However, in the lenticular lens sheet 62 having the conventional structure as described above, a light diffusing material such as glass beads or polymer beads is used for the purpose of forming an image and for expanding the vertical viewing angle. 68 is mixed, and due to this light diffusing material, a part of the incident light becomes stray light as shown by the incident light ray 13a in FIG. 7, which causes deterioration of resolution and loss of light quantity of emitted light, resulting in a decrease in brightness. have.
【０００５】また光拡散材の一部はレンチキュラーレン
ズシート６２のシリンドリカル状のレンチキュラーレン
ズ６５や縞状で非集光部突起状のブラックストライプ６
７の表面に突出しているのが一般的である。このために
レンチキュラーレンズシート６２の表面が凹凸となり、
レンチキュラーレンズシート６２の出射光側表面に外光
が照射されたときに乱反射が起こりスクリーン面が白っ
ぽくなり、コントラストの劣化が生じるという問題があ
る。A part of the light diffusing material is a cylindrical lenticular lens 65 of the lenticular lens sheet 62 or a striped black stripe 6 having a non-light-condensing portion projection.
It is generally projected on the surface of 7. Therefore, the surface of the lenticular lens sheet 62 becomes uneven,
There is a problem that when the surface of the lenticular lens sheet 62 on the outgoing light side is irradiated with external light, diffuse reflection occurs, the screen surface becomes whitish, and the contrast deteriorates.
【０００６】鮮明感や外光によるコントラストの低下を
改善するために、図７のようにスクリーンの前面に光の
透過率を落としたガラスまたはプラスチック製透明パネ
ル１２を配置する方法もあるが、この場合、透明パネル
１２への外光（蛍光灯、電灯、周囲の人や窓や物等）映
り込みが極端に発生するため画面が見にくいという問題
がある。There is also a method of disposing a glass or plastic transparent panel 12 having a reduced light transmittance on the front surface of the screen as shown in FIG. In this case, there is a problem that the screen is difficult to see because the external light (fluorescent lamp, electric lamp, surrounding people, windows, objects, etc.) is extremely reflected on the transparent panel 12.
【０００７】本発明は上記問題に鑑み、観察者に最も近
い出射光側に光拡散性の微粒子を含む薄型拡散層と透明
層との２層からなる前面拡散パネルを配置し、３枚構成
のスクリーンとしたもので、レンチキュラーレンズシー
トから光拡散材の含有を無くすことによって乱反射を防
止し、さらに上記前面拡散パネルの透明層または拡散層
の中に黒色の光吸収材あるいは選択波長光吸収材を含有
させることによって外光の吸収を行い、さらに低屈折率
のフッソ樹脂の薄膜コーティングにより反射率を下げ、
明るく高解像力で外光コントラストの高い映り込みのな
い透過型スクリーンを提供するものである。In view of the above problems, the present invention has a front diffusion panel consisting of two layers, a thin diffusion layer containing light-diffusing fine particles and a transparent layer, on the side of the emitted light closest to the observer, and is composed of three sheets. Diffuse reflection is prevented by eliminating the light diffusing material from the lenticular lens sheet, and a black light absorbing material or a selective wavelength light absorbing material is used in the transparent layer or the diffusing layer of the front diffusion panel. Absorption of external light by containing it, further reduce the reflectance by thin film coating of low refractive index fluorine resin,
It is intended to provide a transmissive screen which is bright and has a high resolution and a high contrast of outside light and which is free of glare.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に、本発明の透過型スクリーンは、光入射光側にフレネ
ルレンズシートを，その前面に透明レンチキュラーレン
ズシートを配置し，観察者に最も近い出射光側に光拡散
性の微粒子を含む薄型拡散層と透明層との２層からなる
前面拡散パネルを配置した３枚構成のスクリーンとして
いる。In order to solve the above-mentioned problems, the transmission type screen of the present invention has a Fresnel lens sheet on the light incident light side and a transparent lenticular lens sheet on the front surface thereof, so that the observer can see the most. A three-panel screen is provided in which a front diffusion panel consisting of two layers, a thin diffusion layer containing light-diffusing fine particles and a transparent layer, is arranged on the side of the emitted light.
【０００９】前記前面拡散パネルは光拡散性の微粒子を
含む薄型拡散層により画像を結像し、レンチキュラーレ
ンズには拡散材を混入していないので迷光が無く出射光
の光量ロスも低減する。さらにレンチキュラーレンズと
ブラックストライプの縦状の筋を観察者から見えなく
し、透明層により鮮明度が高まり高解像力と明るい画面
がが得られる。In the front diffusion panel, an image is formed by a thin diffusion layer containing light diffusing fine particles, and since no diffusing material is mixed in the lenticular lens, there is no stray light and the loss of the amount of emitted light is reduced. Furthermore, the vertical stripes of the lenticular lens and the black stripes are invisible to the observer, and the transparent layer enhances the sharpness, resulting in high resolution and a bright screen.
【００１０】またレンチキュラーレンズには拡散材を混
入していないので、スクリーン仕様の内、水平視野角と
カラーシフト，シェーディング等の一定の機能を有すれ
ば良く、その結果一つの金型で連続生産可能となる。そ
して、スクリーンス仕様において変化の多いゲイン，垂
直視野角，コントラスト等の機能は前記前面拡散パネル
で対応できるのでレンチキュラーレンズのコストを安く
できる。Since the diffusing material is not mixed in the lenticular lens, it is sufficient that the lenticular lens has a certain function such as horizontal viewing angle, color shift, and shading within the screen specifications, and as a result, one die is used for continuous production. It will be possible. The functions such as gain, vertical viewing angle, and contrast, which change a lot in the screen specifications, can be handled by the front diffusion panel, so that the cost of the lenticular lens can be reduced.
【００１１】この前面拡散パネルでゲインを高め，垂直
視野角を低くするには薄型拡散層の拡散材を少なくすれ
ば良い。逆に薄型拡散層の拡散材を多くすればゲインが
低く垂直視野角の高いものが得られる。In order to increase the gain and reduce the vertical viewing angle with this front diffusion panel, it is sufficient to use a small amount of diffusion material in the thin diffusion layer. On the contrary, if the amount of the diffusing material of the thin diffusing layer is increased, the gain is low and the vertical viewing angle is high.
【００１２】前面拡散パネルにおいて光拡散性の微粒子
を含む薄型拡散層または透明層の内少なくとも１方に、
可視光線吸収材料の光吸収スペクトルが可視波長領域に
おいてほぼ一様な黒色の材料、または選択波長特性を有
する可視光線吸収材料のいずれか一方を含有させること
により、可視光線波長領域における光吸収率を増加さ
せ、対外光コントラストを向上させることができる。At least one of the thin diffusion layer or transparent layer containing light diffusing fine particles in the front diffusion panel,
By including either a black material whose light absorption spectrum of the visible light absorbing material is substantially uniform in the visible wavelength region or a visible light absorbing material having a selective wavelength characteristic, the light absorption rate in the visible light wavelength region is improved. It is possible to increase the contrast and improve the external light contrast.
【００１３】この際、可視光線を吸収する材料としては
熱可塑性樹脂と相溶性のある色素、顔料、カーボン、金
属塩等を用いることができる。At this time, as the material that absorbs visible light, dyes, pigments, carbon, metal salts and the like which are compatible with the thermoplastic resin can be used.
【００１４】更に、前記可視光線吸収材料の吸収スペク
トルは必ずしも平坦である必要はなく、投写型テレビジ
ョン受像機で使用される三色のＣＲＴの強度比や、色純
度向上の目的等により波長特性やピークがあっても良
い。Further, the absorption spectrum of the visible light absorbing material does not necessarily have to be flat, and the wavelength characteristics may be adjusted depending on the intensity ratio of the three color CRTs used in the projection television receiver, the purpose of improving the color purity, and the like. There may be peaks.
【００１５】さらに、フレネルレンズシート，レンチキ
ュラーレンズシート，２層構造の前面拡散パネルの各々
の表面に透明フッソ樹脂よりなる薄膜を施し、反射防止
をすることにより透過率（画面の明るさ）と対外光コン
トラストを向上させることができる。この透明フッソ樹
脂よりなる薄膜は反射防止として使用するため、スクリ
ーンの基材の屈折率より低屈折率でなければいけない。
なぜなら、反射防止膜の基本理論は、図４に示すように
薄膜１８の上面反射光１６ａおよび下面反射光１６ｂか
らの反射光が打ち消し合う干渉効果によるものである。Further, a thin film made of transparent fluororesin is applied to the surface of each of the Fresnel lens sheet, the lenticular lens sheet, and the front diffusion panel having a two-layer structure to prevent reflection, thereby increasing the transmittance (screen brightness) and the outside. The light contrast can be improved. Since the thin film made of this transparent fluorine resin is used for antireflection, it must have a refractive index lower than that of the base material of the screen.
This is because the basic theory of the antireflection film is based on the interference effect in which the reflected lights from the upper surface reflected light 16a and the lower surface reflected light 16b of the thin film 18 cancel each other as shown in FIG.
【００１６】基板１９の屈折率をｎ2 ，薄膜１８の屈折
率をｎ1 ，そして入射光側媒質１７（ほとんどの場合空
気）の屈折率をｎ0 と定義する。薄膜１８の上面反射光
１６ａと下面反射光１６ｂからの反射２光束２０が完全
に打ち消し合うには、上面反射光１６ａと下面反射光１
６ｂの強度が相等しくなければならない。このためには
各境界面における屈折率が等しい、すなわちｎ0 ／ｎ1
＝ｎ1 ／ｎ2 （ｎ1 ＝√ｎ0 ×√ｎ2 ）が成立する必要
がある。このｎ0 ／ｎ1 ＝ｎ1 ／ｎ2 （ｎ1 ＝√ｎ0 ×
√ｎ2 ）より反射防止膜の屈折率は、通常屈折率１とみ
なせる空気と基板の屈折率の間の値、つまり基板の屈折
率の平方根の値となる。The refractive index of the substrate 19 is defined as n 2 , the refractive index of the thin film 18 is defined as n 1 , and the refractive index of the incident light side medium 17 (air in most cases) is defined as n 0 . In order to completely cancel the two reflected light beams 20 from the upper surface reflected light 16a and the lower surface reflected light 16b of the thin film 18, the upper surface reflected light 16a and the lower surface reflected light 1
The strengths of 6b must be equal. For this purpose, the refractive index at each boundary is equal, that is, n 0 / n 1
= N 1 / n 2 (n 1 = √n 0 × √n 2 ) must be satisfied. This n 0 / n 1 = n 1 / n 2 (n 1 = √n 0 ×
From √n 2 ), the refractive index of the antireflection film is a value between the refractive index of air and the substrate, which can be regarded as a normal refractive index 1, that is, a square root of the refractive index of the substrate.
【００１７】入射光１６の一部は反射防止膜の上面およ
び下面で反射されるが、共に反射は隣接する媒質より低
い屈折率の媒質中で生じる。従って、反射２光束が打ち
消し合う干渉効果にするには、相対的な位相シフトが１
８０゜になるようにすれば良く二つの光束の間の全位相
差が１／４波長の２倍，すなわち、１８０゜に対応する
とき、膜の光学薄膜が１／４波長の膜厚（ｄ）＝（λ×
１）／（４×ｎ1 ）になるようにすれば良い。これらの
ことから、最も簡単な反射防止膜は基板の屈折率の平方
根に等しい屈折率をもち、かつその光学薄膜が使用する
際の光の波長の１／４に等しい値をもつ単層膜となる。A part of the incident light 16 is reflected on the upper surface and the lower surface of the antireflection film, but both reflections occur in a medium having a lower refractive index than the adjacent medium. Therefore, in order to create an interference effect in which the two reflected light beams cancel each other, the relative phase shift is 1
If the total phase difference between the two light beams corresponds to twice the quarter wavelength, that is, 180 °, the optical thin film of the film has a thickness (d) of the quarter wavelength (d). = (Λ ×
1) / (4 × n 1 ). From these facts, the simplest antireflection film is a monolayer film having a refractive index equal to the square root of the refractive index of the substrate and a value equal to 1/4 of the wavelength of light when the optical thin film is used. Become.
【００１８】現存する薄膜材料として、透明フッソ樹脂
が最も理論値に近くその屈折率は、一般的に１．３２〜
１．３５であり、安定な反射防止膜を溶液からのコーテ
ィングにより容易に製造することができる。このような
フッソ樹脂としては、例えば、旭硝子（株）製「サイト
ップ」（商品名）が用いられ、サイトップの濃度とコー
ティング槽からの引き上げ速度のコントロールにより、
膜厚が数十μｍから数十ｎｍの薄膜まで容易に得られ
る。As an existing thin film material, transparent fluorine resin is closest to the theoretical value, and its refractive index is generally 1.32.
It is 1.35, and a stable antireflection film can be easily manufactured by coating from a solution. As such a fluorine resin, for example, "Cytop" (trade name) manufactured by Asahi Glass Co., Ltd. is used, and by controlling the concentration of Cytop and the pulling rate from the coating tank,
A thin film having a thickness of several tens of μm to several tens of nm can be easily obtained.
【００１９】スクリーン基材としてアクリル樹脂を用い
た場合、前記薄膜は０．１μｍとなり反射率はアクリル
樹脂単位の約４％から薄膜形成後には約１％まで低減す
る。When an acrylic resin is used as the screen substrate, the thin film has a thickness of 0.1 μm, and the reflectance is reduced from about 4% of the acrylic resin unit to about 1% after the thin film is formed.
【００２０】[0020]
【作用】本発明は上記した３枚構成のスクリーンによっ
て各々にスクリーンの性能を分担させることができるの
で、明るく高解像力で映り込みのないハイコントラスト
の性能が得られ、従来のように投写型テレビジョン受像
機の仕様毎に種々のスクリーンを作る必要がなく、金型
投資が少なく生産性も上がりコストダウンも図れる。ま
たスペックも自由に変えることができ市場の対応が素早
くできる。According to the present invention, since the screens having the above-mentioned three-piece structure can share the performance of the screens with each other, a bright and high-resolution, high-contrast performance without reflection can be obtained, and the projection-type television as in the past. It is not necessary to make various screens for each specification of the John receiver, and the mold investment is small and the productivity and the cost can be reduced. In addition, the specifications can be changed freely and the market can be responded quickly.
【００２１】[0021]
（実施例１）以下本発明の第１の実施例について、図１
〜図２および図７に示す図面で説明する。(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
2 to 7 will be described.
【００２２】図１は、本発明の第１の実施例の透過型ス
クリーンの断面図を示す。図１において、本発明の透過
型スクリーンは、光入射光側にフレネルレンズ４を形成
したフレネルレンズシート１を、その前面にレンチキュ
ラーレンズ５，６を形成した透明レンチキュラーレンズ
シート２を配置し、観察者に最も近い出射光側に光拡散
性微粒子８（以下拡散材と言う）を含む薄型拡散層９と
透明層１０とを有する前面拡散パネル３を配置した３枚
構成としている。FIG. 1 is a sectional view of a transmissive screen according to the first embodiment of the present invention. In FIG. 1, the transmission screen of the present invention has a Fresnel lens sheet 1 having a Fresnel lens 4 formed on the light incident light side, and a transparent lenticular lens sheet 2 having lenticular lenses 5 and 6 formed on the front surface thereof. A front diffusion panel 3 having a thin diffusion layer 9 containing light diffusing fine particles 8 (hereinafter referred to as a diffusion material) and a transparent layer 10 is arranged on the side of the emitted light closest to the person, and has a three-layer structure.
【００２３】本発明の透過型スクリーンのレンチキュラ
ーレンズシート２は拡散材を含有せず透明な樹脂材料で
構成され、入射光側の主平面にレンチキュラーレンズ５
を、出射光側の主平面にレンチキュラーレンズ６を、出
射光側レンチキュラーレンズ６の非集光部にブラックス
トライプ７が等ピッチで配設されている。前面拡散パネ
ル３は観察者側が透明層１０となりレンチキュラーレン
ズシート２側が薄型拡散層９となるように配置され、薄
型拡散層９に拡散材８が含有されている。The lenticular lens sheet 2 of the transmissive screen of the present invention is made of a transparent resin material containing no diffusing material, and the lenticular lens 5 is formed on the main plane on the incident light side.
The lenticular lens 6 is arranged on the main plane on the outgoing light side, and the black stripes 7 are arranged on the non-focusing portion of the outgoing light side lenticular lens 6 at equal pitches. The front diffusion panel 3 is arranged so that the viewer side is the transparent layer 10 and the lenticular lens sheet 2 side is the thin diffusion layer 9, and the thin diffusion layer 9 contains the diffusion material 8.
【００２４】従来図６，図７に示すようにレンチキュラ
ーレンズシート６２の全域に拡散材が分散している場
合、入射光線１３ｂのような透過光ばかりではなく、入
射光線１３ａのような迷光が多く発生して光量ロスが起
こる。Conventionally, as shown in FIGS. 6 and 7, when the diffusing material is dispersed over the entire area of the lenticular lens sheet 62, not only the transmitted light such as the incident light ray 13b but also the stray light such as the incident light ray 13a is large. It occurs and a light amount loss occurs.
【００２５】本発明では上記したようにレンチキュラー
レンズシート２は透明の樹脂材料で構成されているた
め、図１のように入射光線１１ａおよび１１ｂは全て透
過光となり光量ロスが起こらない。入射光線１１ａおよ
び１１ｂは前面拡散パネル３の薄型拡散層９の拡散材８
により結像と拡散をする。このとき入射光線１１ａおよ
び１１ｂは拡散材８により拡散されるが薄型拡散層９を
０．６ｍｍ以下の厚さにすることにより複数の拡散材に
当たらず大半が透過光となり光量ロスが少なくなる。実
験の結果０．２ｍｍ以下が最も良いことが判明した。In the present invention, since the lenticular lens sheet 2 is made of a transparent resin material as described above, the incident light rays 11a and 11b are all transmitted light as shown in FIG. 1 and no light quantity loss occurs. Incident rays 11a and 11b are diffused by the diffusing material 8 of the thin diffusing layer 9 of the front diffusing panel 3.
Image and diffuse by. At this time, the incident light rays 11a and 11b are diffused by the diffusing material 8, but by making the thin diffusing layer 9 to have a thickness of 0.6 mm or less, most of the light rays do not hit the plurality of diffusing materials and become transmitted light, and the loss of light amount is reduced. As a result of the experiment, it was found that 0.2 mm or less was the best.
【００２６】このスクリーンの性能を測定した結果、視
野角その他の性能を同じにするとゲインが１０％向上し
た。なお、薄型拡散層９は図２のように表面拡散層１４
としても同様の効果を得られる。さらに、拡散層８によ
りレンチキュラーレンズとブラックストライプの縦状の
筋が観察者から見えなくなり、至近距離においても解像
力が向上したように見える。As a result of measuring the performance of this screen, the gain was improved by 10% when the viewing angle and other performances were the same. The thin diffusion layer 9 has a surface diffusion layer 14 as shown in FIG.
Also, the same effect can be obtained. Further, the diffusing layer 8 makes the vertical stripes of the lenticular lens and the black stripes invisible to the observer, and it seems that the resolution is improved even at a close range.
【００２７】また前面拡散パネル３の透明層１０は薄い
拡散層９の補強材となるとともに、観察者側表面が鏡面
のため鮮明感が得られる。透明層１０の厚さは２〜３ｍ
ｍが適当である。Further, the transparent layer 10 of the front diffusion panel 3 serves as a reinforcing material for the thin diffusion layer 9 and the surface on the observer side is a mirror surface so that a clear feeling can be obtained. The thickness of the transparent layer 10 is 2-3 m
m is suitable.
【００２８】本発明に用いるレンチキュラーレンズ２は
従来の製造装置を用い拡散材を混入することなく透明樹
脂で製造すればよい。The lenticular lens 2 used in the present invention may be manufactured from a transparent resin using a conventional manufacturing apparatus without mixing a diffusing material.
【００２９】前面拡散パネルは拡散層の材料と透明層の
材料を押し出し成形で合体させて製造することができ
る。The front diffusion panel can be manufactured by combining the material of the diffusion layer and the material of the transparent layer by extrusion molding.
【００３０】図２に示す表面拡散層１４は拡散材を印刷
あるいは塗装等で製造することができるので簡単に安価
で生産できる。Since the surface diffusion layer 14 shown in FIG. 2 can be manufactured by printing or painting a diffusion material, it can be easily manufactured at low cost.
【００３１】（実施例２）次に本発明の第２の実施例に
ついて図１に示す図面で説明する。(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to the drawing shown in FIG.
【００３２】第２の実施例の場合、前面拡散パネル３を
構成する透明層１０に光吸収スペクトルが可視波長領域
においてほぼ一様な光吸収特性を有する黒色の材料を含
有させたものである。この可視光線吸収材料が外光を吸
収して対外光コントラストを向上させる。また可視光線
吸収材料の含有率により対外光コントラストを変化させ
ることができるため明るさと外光コントラストを自由に
コントロールできる。In the case of the second embodiment, the transparent layer 10 constituting the front diffusion panel 3 contains a black material having a light absorption characteristic of which the light absorption spectrum is substantially uniform in the visible wavelength region. This visible light absorbing material absorbs external light and improves the external light contrast. Further, since the external light contrast can be changed by the content ratio of the visible light absorbing material, the brightness and the external light contrast can be freely controlled.
【００３３】さらに第２の実施例において、可視光線吸
収材料は透明層１０以外に拡散材８，薄型拡散層９，レ
ンチキュラーレンズシート２，フレネルレンズシート１
のいずれか１つ、あるいは複数、または全てに含有させ
ても同様の改善ができることは言うまでもない。Furthermore, in the second embodiment, the visible light absorbing material is a diffusion material 8, a thin diffusion layer 9, a lenticular lens sheet 2, a Fresnel lens sheet 1 in addition to the transparent layer 10.
Needless to say, the same improvement can be achieved by including any one of them, or a plurality of them, or all of them.
【００３４】（実施例３）次に本発明の第３の実施例に
ついて、図３から図５に示す図面で説明する。(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to the drawings shown in FIGS.
【００３５】図３は、本発明の第３の実施例の透過型ス
クリーンの断面図を示す。図３において、本発明は３枚
構成のスクリーン形成するフレネルレンズシート１，レ
ンチキュラーレンズシート２および薄型拡散層９と透明
層１０を有した前面拡散パネル３の総べての主平面に反
射防止薄膜１５を形成した構造としている。FIG. 3 is a sectional view of a transmissive screen according to the third embodiment of the present invention. In FIG. 3, according to the present invention, an antireflection thin film is formed on all principal planes of a Fresnel lens sheet 1, a lenticular lens sheet 2 and a front diffusion panel 3 having a thin diffusion layer 9 and a transparent layer 10 for forming a screen of three sheets. 15 is formed.
【００３６】反射防止膜１５は、現存する最も低屈折率
の透明フッソ樹脂溶液［旭硝子（株）製サイトップ］の
中にディップして一定の速度で引き上げることにより均
一な薄膜を形成したものである。The antireflection film 15 is formed by dipping it in a transparent fluororesin resin solution [CYTOP, manufactured by Asahi Glass Co., Ltd.] having the lowest existing refractive index and pulling it at a constant speed to form a uniform thin film. is there.
【００３７】この反射防止膜の膜厚は可視光線の中央
（５５０ｎｍ）で最も低反射となるようにするべく前記
した反射防止膜の基本理論（ｄ）＝（λ×１）／（４×
ｎ1 ）に従って算出（０．５５／（４×１．３４）＝
０．１０３）して０．１μの膜厚でコーティングした結
果、図５のようにコーティング前のアクリル樹脂の反射
率２１の曲線に対し、サイトップコーティング後の反射
率２２の曲線のようになった。The basic theory of the antireflection film described above (d) = (λ × 1) / (4 ×) so that the thickness of this antireflection film has the lowest reflection at the center of visible light (550 nm).
calculated according to n 1 ) (0.55 / (4 × 1.34) =
0.103) and coating with a film thickness of 0.1 μ. As a result, as shown in FIG. 5, a curve of reflectance 22 of the acrylic resin before coating becomes a curve of reflectance 22 after Cytop coating. It was
【００３８】前記反射防止膜をコーティングしたスクリ
ーンを実際に投写型テレビジョン受像機に取りつけてゲ
インと外光コントラストを測定した結果、１５〜１８％
の向上が図れ、スクリーン外部の写り込みのない良質の
画像が得られた。As a result of actually mounting the screen coated with the antireflection film on the projection type television receiver and measuring the gain and the contrast of outside light, 15 to 18%
It was possible to improve the image quality and obtain a high-quality image with no reflection outside the screen.
【００３９】[0039]
【発明の効果】以上説明したように、拡散材を含む薄型
拡散層と透明層との２層からなる前面拡散パネルを観察
者に最も近い出射光側に配置したことにより、レンチキ
ュラーレンズとブラックストライプの縦状の筋が観察者
に見えなくなると共に薄型拡散層により迷光が無くな
り、明るさと解像力が改善され、透明層による鮮明感が
得られる。As described above, the lenticular lens and the black stripe are arranged by arranging the front diffusion panel composed of two layers of the thin diffusion layer containing the diffusion material and the transparent layer on the side of the emitted light closest to the observer. The vertical streaks disappear invisible to the observer, stray light is eliminated by the thin diffusion layer, brightness and resolution are improved, and a clear feeling is obtained by the transparent layer.
【００４０】さらに、前面拡散パネルの透明層または薄
型拡散層の内少なくとも一方に可視光線を吸収する光吸
収材を含有させることにより、外光を吸収して対外光コ
ントラストの改善が図れる。Furthermore, by incorporating a light absorbing material that absorbs visible light into at least one of the transparent layer and the thin diffusion layer of the front diffusion panel, it is possible to absorb external light and improve the contrast with external light.
【００４１】さらに、反射防止膜をコーティングするこ
とにより、投写光の透過率が高くなり明るい画面が得ら
れ、外光の反射が少なく写り込みの無いハイコントラス
トで鮮明度の高い画像が得られる。Further, by coating the antireflection film, the transmittance of projection light is increased and a bright screen is obtained, and a high-contrast image having high contrast with less reflection of external light and no reflection is obtained.
【図１】本発明の第１および第２の実施例におけるフレ
ネルレンズシートとレンチキュラーレンズシートと前面
拡散パネルの上断面図FIG. 1 is an upper sectional view of a Fresnel lens sheet, a lenticular lens sheet, and a front diffusion panel according to the first and second embodiments of the present invention.
【図２】本発明の第１および第２の実施例における前面
拡散パネルの表面に拡散材を配設した上断面図FIG. 2 is an upper sectional view in which a diffusing material is arranged on the surface of the front diffusion panel in the first and second embodiments of the present invention.
【図３】本発明の第３の実施例におけるフレネルレンズ
シートとレンチキュラーレンズシートと前面拡散パネル
の上断面図FIG. 3 is an upper sectional view of a Fresnel lens sheet, a lenticular lens sheet, and a front diffusion panel according to a third embodiment of the present invention.
【図４】反射防止の基本理論の説明図FIG. 4 is an explanatory diagram of the basic theory of antireflection.
【図５】反射防止膜コーティングによる反射率測定結果FIG. 5: Results of reflectance measurement with anti-reflection coating
【図６】従来のスクリーン構成斜視図FIG. 6 is a perspective view of a conventional screen configuration.
【図７】従来のスクリーンの観察者側に透明パネルを配
置した上断面図FIG. 7 is an upper cross-sectional view in which a transparent panel is arranged on the viewer side of a conventional screen.
１ フレネルレンズシート ２ レンチキュラーレンズシート ３ 前面拡散パネル ４ フレネルレンズ ５ 入射光側レンチキュラーレンズ ６ 出射光側レンチキュラーレンズ ７ ブラックストライプ ８ 光拡散性微粒子 ９ 薄型拡散層 １０ 透明層 １１ａ 入射光線ａ １１ｂ 入射光線ｂ １４ 表面拡散層 １５ 反射防止膜 １６ 入射光 １６ａ 薄膜の上面反射光 １６ｂ 薄膜の下面反射光 １７ 入射光側媒質 １８ 薄膜 １９ 基板 ２０ 反射２光束の強度 ２１ アクリル樹脂の反射率 ２２ サイトップコーティング後の反射率 1 Fresnel lens sheet 2 Lenticular lens sheet 3 Front diffusion panel 4 Fresnel lens 5 Incident light side lenticular lens 6 Emitting light side lenticular lens 7 Black stripe 8 Light diffusing fine particles 9 Thin diffusion layer 10 Transparent layer 11a Incident ray a 11b Incident ray b 14 Surface Diffusion Layer 15 Antireflection Film 16 Incident Light 16a Thin Film Top Reflected Light 16b Thin Film Bottom Reflected Light 17 Incident Light Side Medium 18 Thin Film 19 Substrate 20 Reflected 2 Luminous Flux 21 Acrylic Resin Reflectance 22 After Cytop Coating Reflectance
Claims (4)
光入射光側に配置し、観察者に最も近い出射光側に拡散
層と透明層との２層からなる前面拡散パネルを配置する
と共に、前記透明層の観察者に最も近い主平面をフラッ
ト面としたことを特徴とする透過型スクリーン。1. A lens sheet having a lens surface is arranged on the light incident light side, and a front diffusion panel consisting of two layers of a diffusion layer and a transparent layer is arranged on the emission light side closest to an observer. A transparent screen, characterized in that a main plane closest to an observer of the transparent layer is a flat surface.
その前面に透明レンチキュラーレンズシートを配置し、
観察者に最も近い出射光側に拡散層と透明層との２層か
らなる前面拡散パネルを配置した３枚構成としたことを
特徴とする透過型スクリーン。2. A Fresnel lens sheet on the light incident light side,
Place a transparent lenticular lens sheet on its front,
A transmissive screen having a three-panel structure in which a front diffusion panel composed of two layers of a diffusion layer and a transparent layer is disposed on the side of the emitted light closest to the observer.
ンにおいて、前記拡散層と透明層の２層の内少なくとも
１層に、光吸収スペクトルが可視波長領域においてほぼ
一様な黒色の材料、または選択波長特性を有する可視光
線吸収材料のいずれか一方を含ませたことを特徴とする
透過型スクリーン。3. The transmissive screen according to claim 1, wherein at least one of the two layers of the diffusion layer and the transparent layer is a black material whose light absorption spectrum is substantially uniform in the visible wavelength region, or A transmission screen comprising one of visible light absorbing materials having a selective wavelength characteristic.
リーンにおいて、前記レンズ面を形成してなるレンズシ
ートと前記前面拡散パネルの各々の表面に低屈折率の透
明フッソ樹脂よりなる反射防止膜を施したことを特徴と
する透過型スクリーン。4. The transmissive screen according to claim 1, 2 or 3, wherein the lens sheet formed with the lens surface and the front diffusion panel each have an antireflection coating made of a transparent fluorine resin having a low refractive index. A transmissive screen characterized by having a film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4316808A JPH06160982A (en) | 1992-11-26 | 1992-11-26 | Transmission screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4316808A JPH06160982A (en) | 1992-11-26 | 1992-11-26 | Transmission screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06160982A true JPH06160982A (en) | 1994-06-07 |
Family
ID=18081156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4316808A Pending JPH06160982A (en) | 1992-11-26 | 1992-11-26 | Transmission screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06160982A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH075570A (en) * | 1993-04-19 | 1995-01-10 | Keiwa Shoko Kk | Sheet material for screen |
| EP0733938A1 (en) * | 1995-03-23 | 1996-09-25 | Matsushita Electric Industrial Co., Ltd. | An optical sheet and a light transmission screen using the same |
| WO1998032049A1 (en) * | 1997-01-20 | 1998-07-23 | Dai Nippon Printing Co., Ltd. | Rear projection screen |
| WO1998045753A1 (en) * | 1997-04-10 | 1998-10-15 | Minnesota Mining And Manufacturing Company | Rear projection screen incorporating diffuser |
| JPH11167167A (en) * | 1997-09-26 | 1999-06-22 | Matsushita Electric Ind Co Ltd | Rear projection type screen and rear projector |
| EP1175092A2 (en) * | 2000-07-17 | 2002-01-23 | Sony Corporation | Projection panel assembly, projection apparatus, and production method thereof |
| JP2004085659A (en) * | 2002-08-23 | 2004-03-18 | Mitsubishi Electric Corp | Projection type display device |
| JP2005107046A (en) * | 2003-09-29 | 2005-04-21 | Konica Minolta Holdings Inc | Lenticular lens for display |
| JP2005122008A (en) * | 2003-10-20 | 2005-05-12 | Toppan Printing Co Ltd | Light diffusion sheet and projection screen having antireflection performance |
| US7075718B2 (en) | 2002-11-26 | 2006-07-11 | Mitsubishi Denki Kabushiki Kaisha | Transparent screen and projection display apparatus |
| US7239444B2 (en) | 2003-09-29 | 2007-07-03 | Konica Minolta Holdings, Inc. | Display front plane, display lenticular lens, and display fresnel lens |
| WO2019235365A1 (en) * | 2018-06-04 | 2019-12-12 | 住友電気工業株式会社 | Fresnel lens for concentrated photovoltaic power generation device, concentrated photovoltaic power generation system, and method of manufacturing fresnel lens for concentrated photovoltaic power generation device |
-
1992
- 1992-11-26 JP JP4316808A patent/JPH06160982A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH075570A (en) * | 1993-04-19 | 1995-01-10 | Keiwa Shoko Kk | Sheet material for screen |
| EP0733938A1 (en) * | 1995-03-23 | 1996-09-25 | Matsushita Electric Industrial Co., Ltd. | An optical sheet and a light transmission screen using the same |
| US5724182A (en) * | 1995-03-23 | 1998-03-03 | Matsushita Electric Industrial Co., Ltd. | Optical sheet and a light transmission screen using the same |
| WO1998032049A1 (en) * | 1997-01-20 | 1998-07-23 | Dai Nippon Printing Co., Ltd. | Rear projection screen |
| US6295162B1 (en) | 1997-01-20 | 2001-09-25 | Dai Nippon Printing Co., Ltd. | Rear projection screen with optical sheet having irregularities caused by diffusing material smoothed with a transparent control layer |
| CN100412690C (en) * | 1997-01-20 | 2008-08-20 | 大日本印刷株式会社 | Rear projection screen |
| US6519087B2 (en) | 1997-04-10 | 2003-02-11 | 3M Innovative Properties Company | Rear projection screen incorporating diffuser |
| WO1998045753A1 (en) * | 1997-04-10 | 1998-10-15 | Minnesota Mining And Manufacturing Company | Rear projection screen incorporating diffuser |
| AU732117B2 (en) * | 1997-04-10 | 2001-04-12 | Minnesota Mining And Manufacturing Company | Rear projection screen incorporating diffuser |
| KR100640941B1 (en) * | 1997-04-10 | 2006-11-02 | 미네소타 마이닝 앤드 매뉴팩춰링 캄파니 | Rear projection screen incorporating diffuser |
| JPH11167167A (en) * | 1997-09-26 | 1999-06-22 | Matsushita Electric Ind Co Ltd | Rear projection type screen and rear projector |
| US6614594B2 (en) | 2000-07-17 | 2003-09-02 | Sony Corporation | Projection panel assembly, projection apparatus, and production method thereof |
| EP1175092A3 (en) * | 2000-07-17 | 2002-12-18 | Sony Corporation | Projection panel assembly, projection apparatus, and production method thereof |
| EP1175092A2 (en) * | 2000-07-17 | 2002-01-23 | Sony Corporation | Projection panel assembly, projection apparatus, and production method thereof |
| JP2004085659A (en) * | 2002-08-23 | 2004-03-18 | Mitsubishi Electric Corp | Projection type display device |
| US7075718B2 (en) | 2002-11-26 | 2006-07-11 | Mitsubishi Denki Kabushiki Kaisha | Transparent screen and projection display apparatus |
| JP2005107046A (en) * | 2003-09-29 | 2005-04-21 | Konica Minolta Holdings Inc | Lenticular lens for display |
| US7239444B2 (en) | 2003-09-29 | 2007-07-03 | Konica Minolta Holdings, Inc. | Display front plane, display lenticular lens, and display fresnel lens |
| JP2005122008A (en) * | 2003-10-20 | 2005-05-12 | Toppan Printing Co Ltd | Light diffusion sheet and projection screen having antireflection performance |
| WO2019235365A1 (en) * | 2018-06-04 | 2019-12-12 | 住友電気工業株式会社 | Fresnel lens for concentrated photovoltaic power generation device, concentrated photovoltaic power generation system, and method of manufacturing fresnel lens for concentrated photovoltaic power generation device |
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