KR20030001184A - Screen - Google Patents

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Publication number
KR20030001184A
KR20030001184A KR1020010039354A KR20010039354A KR20030001184A KR 20030001184 A KR20030001184 A KR 20030001184A KR 1020010039354 A KR1020010039354 A KR 1020010039354A KR 20010039354 A KR20010039354 A KR 20010039354A KR 20030001184 A KR20030001184 A KR 20030001184A
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KR
South Korea
Prior art keywords
transparent
scattering
image
light
transparent plate
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KR1020010039354A
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Korean (ko)
Inventor
최해용
Original Assignee
최해용
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Priority to KR1020010039354A priority Critical patent/KR20030001184A/en
Publication of KR20030001184A publication Critical patent/KR20030001184A/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • G03B21/625—Lenticular translucent screens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof

Abstract

PURPOSE: A high definition light collecting transmission screen is provided to increase brightness and contrast, while improving definition by diffusing the light incident from an external source to outside. CONSTITUTION: A reflecting surface(4) is formed at the front surface of a transparent plate(2) which is made of a transparent material including plastic or glass. A transparent spherical surface(5) is formed at the front surface of the reflecting surface, and a reflecting surface(3) is formed between the transparent plate and the transparent spherical surface. The reflecting surface is disposed within the focal distance of the transparent spherical surface, thus permitting the image incident to the transparent plate to be enlarged and projected by the transparent spherical surface after being scattered by the reflecting surface. The light incident from an external source is diffused to outside by the transparent spherical surface, to thereby increase brightness and definition.

Description

고해상도 집광 투과 스크린{SCREEN}High Resolution Condensing Screen {SCREEN}

본 발명은 액정 프로젝터나 각종 프로젝터의 영상을 후면에서 투사하여 전면으로 투과하는 투과형 스크린에 관한 것으로서 종래 스크린에 비해 밝기를 올리고, 스크린 표면에 흑선라인을 부가하여 컨트라스트 효과를 제고하고, 외광(外光) 조명은 분산시키고, 산란 결상된 내부의 광원은 집광(集光) 하므로서 궁극적으로 영상의 밝기와 해상도및 컨트라스트 효율을 배가할수 있는 투과형 스크린의 구조를 제공함에 있다.The present invention relates to a transmissive screen that transmits images of liquid crystal projectors or various projectors from the rear side and transmits them to the front side. The brightness is higher than that of the conventional screen, and black lines are added to the screen surface to enhance contrast effect and to reduce external light. The light is distributed, and the light source inside the scattered image is focused to provide a structure of a transmissive screen that can ultimately double the brightness, resolution, and contrast efficiency of the image.

종래 투과 스크린은 단순면이거나 또는 영상 입사면에 후레스넬렌즈(7)를 구성하고 그 표면에 산란구면(8)을 구성하여 후레스넬렌즈(8)로 집광하고 이를 산란구면(8)에서 확산하는 구조이다. 좀더 자세히 설명하면 도1과 같이 종래 투과스크린(1)은 후레스넬렌즈(103)로 투사된 빛을 모은 다음 상하 굴곡면(105)에 의해 좌우로 산란 시키는 구조이나. 후레스넬렌즈(103)의 작용이 공지된 바와 같이 후레스넬렌즈(103) 표면의 프라즘이 원형으로 무수히 원형중첩 구성되여 중첩 현상으로 빛이 회절 집광 되므로 그 표면이 프리즘의 형태로 인하여 영상이 매우 거칠다.The conventional transmission screen is either a simple plane or a fresnel lens 7 on the image incident surface and a scattering sphere 8 on its surface to condense to the fresnel lens 8 and at the scattering sphere 8 It is a structure that spreads. More specifically, as shown in FIG. 1, the conventional transmission screen 1 collects the light projected by the Fresnel lens 103 and then scatters the left and right sides by the upper and lower curved surfaces 105. As the action of the Fresnel lens 103 is known, the prism on the surface of the Fresnel lens 103 is composed of a myriad of circular overlaps, and the light is diffracted and condensed by an overlapping phenomenon. This is very rough.

따라서 입사된 영상이 거칠어 지는 단점이 있다. 또한 후레스넬렌즈(103)에서 집광된 빛을 산란시킨 후 좌우 시야각을 위해 좌우 산란해야 하므로 상하 굴곡면(105)이 빛을 산란하기 위한 불투명 형태로 구성되여 투사영상이 시청자 방향에서 최종적으로 결상되므로 외광(外光)에 노출 되므로 선명도가 떨어지는 단점이 있다.Therefore, the incident image is rough. In addition, since the light condensed by the Fresnel lens 103 should be scattered left and right for the left and right viewing angles, the upper and lower curved surfaces 105 have an opaque form for scattering light, so that the projected image is finally imaged in the viewer's direction. Since it is exposed to external light (external light) there is a disadvantage that the sharpness falls.

또한 스크린 표면의 상하 굴곡면(104)을 보호하기 위해 그 표면에 보호투명유리를(105)를 설치사용하는바 이경우 외부의 외광이 얼 비쳐 영상자체 시청에 지장을 주는 등 문제가 많았다.In addition, in order to protect the upper and lower curved surface 104 of the screen surface to install a protective transparent glass 105 on the surface in this case there was a lot of problems such as the outside of the outside light to interfere with the viewing of the image itself.

따라서 이러한 구조의 종래 스크린은 영상면이 후레스넬렌즈(7)의 표면구조에 의해 투사되는 영상 자체가 거칠어 TV 영상이나 아나로그 화면의 수용은 가능하나 고해상도의 디지털 영상이나 컴퓨터 영상은 글씨가 뭉개져 나오는 등 고해상도영상 수용에 한계가 있으며 특히, 후레스넬렌즈(7) 구조의 집광으로 인한 좌우 시야각이 좁아지는 등의 문제점이 있었다.Therefore, the conventional screen of such a structure is that the image surface is projected by the surface structure of the Fresnel lens 7, the image itself is coarse to accommodate a TV image or an analog screen, but the high resolution digital image or computer image is crushed. There is a limit in accommodating a high resolution image such as coming out, and in particular, the left and right viewing angles are narrowed due to the condensing of the Fresnel lens 7 structure.

뿐만 아니라 컨트라스트비를 올리기 위하여 산란구면(8) 자체에 어두운 색조를 구성 영상 자체의 명도를 저하시키고 산란구면(8)에서 산란된 영상 자체는 외광에 그대로 노출되므로 영상이 흐려지는 단점이 있었다.In addition, in order to increase the contrast ratio, the dark color tone of the scattering sphere 8 itself decreases the brightness of the constituent image itself, and the scattered sphere 8 itself is exposed to external light, so that the image is blurred.

본 발명은 도2.도3.도4와 같이 상기와 입사면은 입자면이 세밀한 투명판(2)으로 구성하여 고해상도 영상 입사가 가능하게 하고 산란면(3)에서 산란한후 산란 빛중 후면으로 반사하는 면은 투명판(2)의 반사면으로 재반사하여 전면으로 반사하게하고, 반사한 빛은 전면의 투명구면(5)에 의해 확대하여 밝기를 극대화한 한, 투명구면(5)은 외광에 대해 외광을 분산하게 하므로서 밝기의 저하를 방지하고 투명구면(5) 좌우측에 흑색 라인을 형성 투명구면(5)자체 굴절율에 의해 좌우 굴절하여 컨트라스트 효과는 올리되 밝기 감소는 없게끔 구성. 궁극적으로 밝기를 올리고 외광에 대해 컨트라스트를 강하게 하면서 동시에 고해상도 영상 투과를 가능하게 한 것이다.As shown in FIG. 2, FIG. 3, and FIG. 4, the incident surface is composed of a transparent plate 2 having a fine particle surface to enable high-resolution image incidence and is scattered from the scattering surface 3 to the rear of the scattered light. The reflecting surface is reflected back to the reflecting surface of the transparent plate 2 to reflect to the front surface, and the reflected light is enlarged by the transparent spherical surface 5 of the front surface to maximize the brightness. It prevents the fall of brightness by dispersing external light and forms black lines on the left and right sides of the transparent sphere (5). Ultimately, it increases brightness and enhances contrast against external light, while at the same time enabling high-resolution image transmission.

도1은 종래 투과형 스크린 구조에 관한 설명도1 is an explanatory diagram of a conventional transmissive screen structure

도2는 본 발명의 단면 구조에 관한 설명도2 is an explanatory diagram of a cross-sectional structure of the present invention.

도3은 본 발명의 전체구조에 대한 설명도3 is an explanatory diagram of the overall structure of the present invention;

도4는 본발명의 투과 작용에 관한 설명도4 is an explanatory view of the penetrating action of the present invention

도5는 본발명의 확대작용에 관한 설명도5 is an explanatory diagram of the magnification of the present invention;

도6은 외광 반사에 관한 설명도6 is an explanatory diagram of reflection of external light;

도면의 부호에 대한 명칭의 간략한 설명Brief description of the designations for the symbols in the drawings

1. 투과스크린 2. 투명판 3. 산란면 4. 반사면1. Transparent Screen 2. Transparent Plate 3. Scattering Surface 4. Reflecting Surface

5. 투명구면 6. 흑선라인5. Transparent sphere 6. Black line

이러한 본 발명은 도2및 도4와 같이 영상의 입사면(A) 방향 기준하여 평면도가 양호한 유리. 프라스틱 재질의 투명판(2) 전면에 산란면(4)을 형성한 다음 그 전면에 역시 투명으로 형성된 곡면 형태의 투명구면(5)을 구성한다.This invention is a good plan view of the glass relative to the incident surface (A) direction of the image as shown in Figures 2 and 4. The scattering surface 4 is formed on the front surface of the transparent plate 2 of plastic material, and then the transparent spherical surface 5 having a curved shape is also formed on the front surface thereof.

투명구면(5)의 구면이 이루는 마디 사이로 홈선을 형성하여 그 내부에 무광흑색의 흑선라인(6)을 구성한다.Groove lines are formed between nodes formed by the spherical surface of the transparent spherical surface 5 to form a black line 6 of matte black therein.

투명구면(5)의 구성에 있어서 광학적 확대 작용이 중요하므로 도5와 같이 투명구면(5)의 구성은 우선 투명구면(5)의 곡률(R)과 투명구면(5)의 두께(F)는 투명구면(5)의 곡률(R)이 이루는 촛점 거리 이내부터 촛점거리까지의 위치에 산란면(3)이 되도록 구성한다.Since the optical enlargement action is important in the configuration of the transparent sphere 5, the configuration of the transparent sphere 5, as shown in Figure 5, first, the curvature R of the transparent sphere 5 and the thickness (F) of the transparent sphere 5 It is comprised so that the scattering surface 3 may be located in the position from within the focal length which the curvature R of the transparent sphere 5 makes, and a focal length.

또한 재질구성에 있어서 산란면(3)을 제외한 나머지의 모든 구성은 유리나 프라스틱과 같은 투명재질로 구성한다.In addition, in the material composition, all components other than the scattering surface 3 are made of a transparent material such as glass or plastic.

이러한 본 발명은 도3과 같이 입사면(A)으로 입사한 광량은 투명판(2)을 투과한 후 산란면(3)에서 결상된 영상의 빛은 스크린 전면뿐만 아니라 일부는 후면 으로도 산란된다.In the present invention, as shown in FIG. 3, the amount of light incident on the incident surface A is transmitted through the transparent plate 2, and the light of the image formed on the scattering surface 3 is scattered not only at the front of the screen but also at the rear of the screen. .

즉, 도3의 산란 광량중 후면으로 산란되는 후면광량(A1)은 투명판(2)의 표면인 반사면(4)에 의해 일부분이 반사되어 전면으로 반사되므로 밝기가 증가하게 한다. 즉 직선으로 직접 투과된 광량은 투과되지만 산란되여 사각(斜角)으로 입사하는 광량은 투명판(2)의 임계각에서 반사하게 되는 것은 공지 되여 있다That is, the back light amount A1 scattered to the back side of the scattered light amount of FIG. 3 is partially reflected by the reflecting surface 4, which is the surface of the transparent plate 2, and is reflected to the front side, thereby increasing the brightness. That is, it is known that the amount of light transmitted directly in a straight line is transmitted, but the amount of light that is scattered and incident in a square is reflected at the critical angle of the transparent plate 2.

이와같이 전후면으로 산란되는 광량은 산란면(3) 전면의 투명구면(5)에 의해 다시 집광하게 한다.In this way, the amount of light scattered to the front and rear surfaces is focused again by the transparent spherical surface 5 on the front surface of the scattering surface 3.

즉, 렌즈의 확대 작용은 공지된 바와같이 사용되는 유리나 프라스틱의 굴절율 ND=1.5이다.That is, the magnification of the lens is ND = 1.5 of the refractive index of glass or plastic used as is known.

본 발명의 구조상 한면은 평면 즉 R1=0 이어야 하고 한면은 구면형태인 단구면 형태가 된다.According to the structure of the present invention, one side should be flat, that is, R1 = 0 and one side will be in the form of a spherical surface.

따라서 단구면의 구면 간격(C)을 1m/m 로 할 경우 F=2m/m 된다. F=(1-ND)()이다 따라서 F=(1.50-1)() == 2가 되기 때문이다.Therefore, when spherical spacing C of the end face is 1 m / m, F = 2 m / m. F = (1-ND) ( Therefore F = (1.50-1) ( ) = = 2 because

즉 R은 1m/m로 F=2m/m로 할 경우 투명구면(5)이 갖는 촛점거리는 2m/m가 되므로 이에 밀착되어 있는 산란면(3)의 위치는 동일한 위치의 2m/m 이내가 되므로 동 위치의 투과 영상을 확대하게 된다.In other words, when R is 1 m / m and F = 2 m / m, the focal length of the transparent sphere 5 becomes 2 m / m. Therefore, the position of the scattering surface 3 closely adhered thereto is within 2 m / m of the same position. The transmission image of the same position is enlarged.

이와같은 영상 확대 작용은 촛점거리 위치에서 최대의 밝기 효과가 나타나며 그 이내에서도 비례효과가 있게된다. 촛점거리 이상이 되면 효과가 감소한다. 따라서 투명구면(2)이 갖는 촛점거리내지 그 이내로 구성한다. 또한 영상의 빛을 외광에 대한 강한 지향성을 갖게 하므로 영상 밝기효과 증대를 획기적으로 갖어온다.Such image magnification has a maximum brightness effect at the focal length position and a proportional effect within that range. If the focal length is over, the effect is reduced. Therefore, it consists of within the focal length which the transparent spherical surface 2 has. In addition, since the light of the image has a strong directivity to the external light, the image brightness effect is greatly increased.

도6과 같이 이와같은 투명구면(5)의 구면은 밝은 장소에서 사용할시 외부의 외광(G)에 대해서 구면 곡률에 의해 모두 외부로 반사하므로 컨트라스트 저하를 방지하게 되는 것이다.As shown in FIG. 6, the spherical surface of the transparent spherical surface 5 reflects all of the external light G to the outside by spherical curvature when used in a bright place, thereby preventing a decrease in contrast.

또한 도4와 같이 투명구면(5)의 간격 사이로 홈을 구성하고 그 내부에 흑색라인(6)을 형성할시 투명구면(5)의 자체 구면굴절율로 인해 그 내부로 흑색면이 내부 굴절하여 컨트라스트 효과를 증대하므로 선명도를 높일 수 있다.In addition, as shown in FIG. 4, when the groove is formed between the gaps of the transparent sphere 5 and the black line 6 is formed therein, the black surface is internally refracted therein due to its spherical refractive index of the transparent sphere 5. Increasing the effect, you can increase the sharpness.

뿐만아니라 도2의 투명판(2) 부위에 입사면(A) 방향으로 어두운 색조를 박막으로 코팅할 경우 입사 광량의 투과량 효과를 올릴수 있다.In addition, when a dark tint is coated on the transparent plate 2 part of FIG. 2 in the direction of the incident surface A with a thin film, the amount of incident light may be increased.

상기와 같이 본 발명의 작용효과를 도1의 종래 투과스크린(이하 종래 스크린이라 한다)과 도2의 본 발명의 구조를 대비하여 설명하면 다음과 같다.The operation and effect of the present invention as described above will be described with reference to the structure of the conventional transmission screen (hereinafter referred to as conventional screen) of Figure 1 and the present invention of Figure 2 as follows.

즉 도1의 종래 스크린은 구조가 후레스넬렌즈(101), 상하 굴곡면(105), 산란면(104)으로 구성되어 있어서 입사된 영상이 후레스넬렌즈(101) 표면의 프리즘 중첩무늬를 거치면서 거칠어지고 입사된 빛은 상하 굴곡면(105) 표면의 산란면(104)에서 최종적으로 결상되므로 외광에 노출되어 빛의 선명도가 매우 저하되며 상하 굴곡면(105)을 보호하기 위한 표면 보호유리(105)에 의해 외부의 전경이 얼 비치므로 영상의 선명도를 저하시키는 단점이 있는 반면에 본 발병은 도2와 같이 종래 투과 스크린의 후레스넬렌즈(101) 대신에 표면이 정밀한 투명판(2)을 구성하고 그전면에 렌즈구면 형태를 갖는 투명구면(5)을 구성하되 투명판(2)전단과 투명구면(5)후단사이인 중심부분에 산란면(3)을 구성하므로서 입사된 영상은 영상자체 해상도의 저하없이 투명판(2)을 투과한 후 산란면(3)에서 산란하면서 영상이 결상하게 하고, 결상된 영상중 뒤로 산란하는 빛은 다시 산란면(3)과 투명판(2)의 경계에서 투명판(2)의 표면에서 일부분이 다시 반사되므로 그만큼 전면에서 보는 영상의 밝기를 증가하게 하므로서 종래 투과 스크린에 비해 고해상도의 디지털 영상 투과가 가능하면서 밝기 증가 작용도 가능한 작용 효과가 있게 한 것이다.That is, the conventional screen of FIG. 1 has a structure of the fresnel lens 101, the upper and lower curved surfaces 105, and the scattering surface 104, so that the incident image is formed by overlapping the prism overlap pattern on the surface of the fresnel lens 101. Rough and incident light passing through is finally imaged on the scattering surface 104 of the upper and lower curved surfaces 105, so that the light is exposed to external light, the sharpness of the light is very low, and the surface protective glass for protecting the upper and lower curved surfaces 105 While the external foreground is frozen by the 105, there is a disadvantage in reducing the sharpness of the image, while the present disease is a transparent plate 2 having a precise surface instead of the Fresnel lens 101 of the conventional transmission screen as shown in FIG. ) And a transparent spherical surface (5) having a lens spherical shape on its front surface, but the scattering surface (3) at the central portion between the front end of the transparent plate (2) and the rear end of the transparent sphere (5) After passing through the transparent plate 2 without degrading the resolution of the image itself Since the image is imaged while scattering on the egg surface 3, the light scattering backwards of the image is reflected back from the surface of the transparent plate 2 at the boundary between the scattering surface 3 and the transparent plate 2. By increasing the brightness of the image viewed from the front, it is possible to transmit a high-resolution digital image compared to the conventional transmission screen, while also having an effect of increasing the brightness.

또한 도1과 같이 종래 투과 스크린은 스크린 표면의 최종 굴곡면에 산란면(104)이 형성되므로 산란면(104)의 영상은 좌우로 확산하면서 밝기가 저하되는 반면, 본 발명은 도2와 같이 투명구면(5)의 렌즈 작용에 의해 먼저 집광한 후 집광단위로 좌우 확산하므로 밝기 효율을 높아지게 한 것이다.In addition, as shown in FIG. 1, since the scattering surface 104 is formed on the final curved surface of the screen surface as shown in FIG. 1, the image of the scattering surface 104 is decreased while the brightness of the scattering surface 104 is spread from side to side, while the present invention is transparent as shown in FIG. 2. By condensation by the lens action of the spherical surface 5 first and then diffused left and right in the light condensing unit to increase the brightness efficiency.

따라서 이러한 본 발명은 도4와 같이 평면도가 정밀한 투명판(2)으로 영상을 입사하므로 고해상도 디지털 및 컴퓨터 영상을 투과할수 있으며 투과된 빛은 도5와같이 산란면(3)에 산란하되 전면으로 산란된 빛과 후면으로 산란된 빛도 투명판(2)의 표면 반사면에 의해 반사되므로 밝기가 증대되고 이와같이 증대한 밝기는 다시 투명구면(5)의 곡률에 의해 확대 집광되므로 외광에 대한 강한 지향성을 갖음과 동시에 투명구면(5) 사이의 흑선면(6)에 의해 컨트라스트 효과가 증대하므로 선명도가 높아질 뿐아니라 도6과 같이 투명구면(5)의 구면은 외광을 모두 외부로 분산시키므로 선명도 효과를 더욱 증대할 수 있는 것이다.Therefore, the present invention can be transmitted through a high-resolution digital and computer image because the image is incident on the transparent plate 2 having a precise plan view as shown in FIG. 4 and the transmitted light is scattered on the scattering surface 3 as shown in FIG. Since the reflected light and the light scattered to the rear surface are also reflected by the surface reflecting surface of the transparent plate 2, the brightness is increased and thus the increased brightness is condensed by the curvature of the transparent sphere 5 so that the strong directivity to external light is reflected. At the same time, the contrast effect is increased by the black wire 6 between the transparent spheres 5, which not only increases the sharpness, but also the spherical surface of the transparent spheres 5 as shown in FIG. It can be increased.

따라서 이러한 본 발명은 디지털 영상이나 컴퓨터 영상 등을 확대 투사함에 있어서 고해상도 그대로 밝기와 선명도가 현저히 개선된 영상 시청이 가능한 것이다.Therefore, the present invention is capable of viewing an image in which brightness and clarity are remarkably improved in high-resolution projection of a digital image or a computer image.

Claims (2)

프라스틱이나 유리 등의 투명 소재로 형성한 투명판(2)을 재료로 하여 상기 투명판(2) 전면에 산란면(4)을 형성한 다음 상기 산란면(4) 전면에 상하 곡면으로 형성한 투명구면(5)을 구성 하므로서 상기 투명판(2)과 투명구면(5) 사이에 산란면(3)을 구성하되 상기 산란면(2)의 위치는 상기 투명구면(2)이 갖는 촛점거리 이내로 구성하여 상기 투명판(2)으로 입사한 영상은 산란면(3)에서 산란후 투명구면(5)에 의해 확대 투과 하게하고A transparent plate 2 formed of a transparent material such as plastic or glass is used as a material, and a scattering surface 4 is formed on the entire surface of the transparent plate 2, and then transparent formed on the entire surface of the scattering surface 4. By constructing the spherical surface 5, the scattering surface 3 between the transparent plate 2 and the transparent spherical surface 5 is constituted, but the position of the scattering surface 2 is within the focal length of the transparent sphere 2 The image incident on the transparent plate 2 is enlarged and transmitted by the transparent sphere 5 after scattering from the scattering surface 3 외광(外光)은 투명구면(5)의 표면에 의해 외부로 확산하게 하므로서 밝기와 선명도를 현저히 증대한 것이 특징인 고해상도 투과 스크린High-resolution transmission screen characterized by remarkably increased brightness and clarity by allowing external light to diffuse to the outside by the surface of the transparent spherical surface 5 제1항에 있어서The method of claim 1 투명구면(5) 간격 사이에 홈을 형성하고 그 사이에 흑선라인(6)을 형성한 것이 특징인 고해상도 투과 스크린High resolution transmissive screen characterized in that grooves are formed between the transparent spherical surfaces 5 and black lines 6 are formed therebetween.
KR1020010039354A 2001-06-27 2001-06-27 Screen KR20030001184A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164826A (en) * 1980-05-23 1981-12-18 Dainippon Printing Co Ltd Production of lenticular screen
JPS57210332A (en) * 1981-06-20 1982-12-23 Dainippon Printing Co Ltd Transmission type screen
JPH02118560A (en) * 1988-09-28 1990-05-02 Dainippon Printing Co Ltd Back projection screen
JPH05273657A (en) * 1992-03-26 1993-10-22 Toppan Printing Co Ltd Screen for stereoscopic observation
JPH06332075A (en) * 1993-05-18 1994-12-02 Dainippon Printing Co Ltd Transmission type projection screen and its manufacture
JPH07168282A (en) * 1993-12-14 1995-07-04 Dainippon Printing Co Ltd Transmission type screen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164826A (en) * 1980-05-23 1981-12-18 Dainippon Printing Co Ltd Production of lenticular screen
JPS57210332A (en) * 1981-06-20 1982-12-23 Dainippon Printing Co Ltd Transmission type screen
JPH02118560A (en) * 1988-09-28 1990-05-02 Dainippon Printing Co Ltd Back projection screen
JPH05273657A (en) * 1992-03-26 1993-10-22 Toppan Printing Co Ltd Screen for stereoscopic observation
JPH06332075A (en) * 1993-05-18 1994-12-02 Dainippon Printing Co Ltd Transmission type projection screen and its manufacture
JPH07168282A (en) * 1993-12-14 1995-07-04 Dainippon Printing Co Ltd Transmission type screen

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