Abstract: An educational stereo microscopic image display apparatus is disclosed. The apparatus includes a bag-shaped main box, a planar screen panel which is provided at a front portion of the main box and has a size of 20 inches to 40 inches, and a microscopic image optical system which is provided at a rear portion of the main box and has an objective lens and an image conversion device which converts an optical signal into an electric signal. An image of an object to be inspected is magnified by the microscopic image optical system, and the magnified image is displayed on the large-scale planar screen panel. Accordingly, a teacher and a large number of students (up to about one hundred) can conveniently observe the image of the object to be inspected at the same time.

Abstract: A visual advertising apparatus for a gateway is disclosed. The apparatus includes a screen which includes a reflecting surface having a reflectance of 5% to 40% and reflecting lines formed on the reflecting surface in either a vertical or horizontal direction, the reflecting lines having a reflectance of 0.5% to 20%, and a projector for projecting light to the screen. Accordingly, the brightness of the screen is increased by five to forty times, viewers can see the clear image while moving around within the extended vertical and horizontal viewing angles of 30° to 4.5°, and the weight of the screen and the projector can be reduced, which makes it possible to install the large screen.

Abstract: Disclosed is a double-sided image film screen including a plastic material having a high optical transmission property and a light-refracting material, made of silica, having an optical transmission property and a refractivity of 1.4˜2.5, wherein a content and a particle size of the light-refracting material and a thickness of the film screen are designated such that an image incident on the film screen by means of light projected from a projector is dividedly displayed on front and rear surfaces of the film screen, thereby displaying the image formed thereon though the front and rear surfaces thereof, increasing the visibility of the image and eliminating a hot spot generated by a projection light source of the projector. Compared to conventional screens, the double-sided image film screen is advantageous in that it displays the image through the front and rear surfaces thereof.

Abstract: Disclosed is a table type large-size imaging apparatus in which an imaging screen and a reflector are installed parallel to each other in front and rear end positions of a table type case with an inclination angle, to allow a viewer to watch an image formed on the screen through a transparent window provided at a top of the table type case. The viewer's watching distance and the image projection distance are overlapped within the table type case, to achieve a maximum screen size with a minimum table size. With this configuration, a viewer who is located close to the imaging apparatus in the form of a table is able to appreciate the vivid large-size image with a downward viewing angle.

Abstract: A writing board device having a high-definition image display function is disclosed. The writing board device includes a main body, a screen device which has a glass panel provided at an upper front portion of the main body and an image forming part provided at a rear surface of the glass panel, the image forming part being formed in a thin film shape, a projector which is provided at a bottom of the main body, and a screen illumination device which is provided at rear of the screen device, the screen illumination device having a projection lens, a color filter and a lamp. Accordingly, the writing board device allows a user to write letters freely on the screen device while displaying the image with a higher definition by two times or more as compared with a conventional device. When the image display is not needed, the writing board device serves as a writing board capable of showing the written letters with a higher definition by two times or more as compared with a conventional device.

Abstract: Disclosed is a brand-shaped image-display advertising apparatus having the shape of a selected brand. The advertising apparatus includes a brand-shaped board that is made of an opaque metal material containing pigments or a transparent plastic or glass material containing dyes, and an optical source device provided at a rear side of the brand-shaped board, the optical source device including an imaging screen using a PDP, LCD, or LED, and a projector. If the projector projects an image on the imaging screen, the brand-shaped board displays the shape of the brand and the image simultaneously. Conversely, when no image is projected, the brand-shaped board displays the colors of the dyes. Accordingly, the brand-shaped image-display advertising apparatus serve to display moving images and also, serve as a brand billboard.

Abstract: Disclosed herein is a projection screen. The screen includes a soft thin elastic transmission sheet having an elongation rate of 50% or more and high transmissivity, the elastic transmission sheet constituting a front surface of the screen, and a thin image sheet for focusing an image projected from a projector, the image sheet constituting a rear surface of the screen. The image sheet may serve as a transmission sheet or a reflection sheet. The image sheet may be directly formed at the screen, or the image sheet may be a hard film attached to the rear of the elastic transmission sheet. A vibration plate is disposed at the outside of the image sheet. Consequently, incident image is transmitted or reflected without any interference with external light, and therefore, it is possible to increase the brightness of the screen by two to five times as compared to a conventional screen.

Abstract: The device relates to a wall roll-up screen of which the upper and the lower are attached with the upper short rod and the lower short rod, respectively, wherein the screen is constituted to be rolled up when not in use and to be unrolled when used, by the lower short rod; and the left and the right end of the upper short rod are mounted with steel structure of groove shaped ringscapable of coupling magnets and the left and the right end of the lower short rod are mounted with magnets to allow them to be coupled with the groove shaped rings of the left end and the right end of the upper short rod, upon rolling up the screen by the lower short rod and, if necessary, separating the magnets from the groove shape rings, thereby to obtain good portability and mobility of the screen, to prevent the screen from being twisted from side to side upon fixing the screen, and to improve aesthetic value of product.

Abstract: A thin film reflective screen includes a surface layer, a transmission layer, a diffusion layer and a reflection layer, which are formed in a single screen, which has functions such as an image forming on a surface, scattering, transmission, diffusion, and reflection, which are duplicated by re-reflecting light such that an image signal of pixel unit of an electronic image projected from a DLP projector or an LCD projector is enlarged to increase definition and brightness of the image. A dark color layer is formed on the surface of the screen such that contrast of the image is increased during the diffusion and the reflection, and as a result, resolution of the image is increased by two to nine times.

Abstract: Disclosed herein is a screen display which enables visual change of light related to sounds to be exhibited along with images on the screen. The screen display comprises a frame surrounding the screen display to couple a plurality of lamps to the screen display, a lamp line constituted by the plurality of lamps within the frame, a sensor, and a signal converter connected to the lamp line. Variation in illumination and colors of the lamps is shown on the screen along with images, so that the images and the visual change of light related to the sounds are shown on a single screen display.

Abstract: Disclosed are a spherical reflective screen for displaying an image and a method for manufacturing the screen. The screen has a spherical surface with a radius of curvature of a circle drawn centering around a point, and a focal length of the screen is the same as a projection length of a projector so that the projector is located at a focal point of the screen, thus allowing the image formed by means of light projected from the projector to be straightly reflected on the screen but ambient light to be diffused to the outside. A frictional surface and diffusing lines are simultaneously formed on an aluminum foil by rubbing the double-layered aluminum foils together in one direction, therefore, viewing angle and resolution of the screen are improved two times or more.

Abstract: A single channel stereoscopic monitor receives a stereoscopic TV image and an Internet stereoscopic image. Left and right eye images are simultaneously received to display the stereoscopic image by a monitor or a TV through a single channel, are polarized by polarizing plates having left and right deflection angles symmetrical to each other, and are automatically combined into a single stereoscopic image by a reflecting mirror and a half mirror, so that a viewer can watch the stereoscopic image.

Abstract: A dual image projection system separates a single image projected from a single projector into two images vertically or horizontally, inputs the separated images by reversing the left and right sides of the separated images, and completely separates the separated images using a separation mirror disposed in front of a projection lens of the projector such that the separated images are displayed on left and right screens or on front and rear screens. The images displayed on the screens are normal images whose right and left sides are not reversed.

Abstract: A portable screen device having a dual shaft structure is disclosed. A left and a right rotation shafts are installed to an upper rod and the center of a lower frame of a screen in the horizontal direction and are connected to a left and a right supports. The rotation shafts are engaged with each other by a single adjusting device. When the screen moved up, the elasticity of the screen is held by left and right elastic wheels such that height of the screen is maintained. A magnet and a magnetic substance contact each other and are separated from each other at the central portions of the left and right supports. Due to rotation of a rotation rod installed in the intermediate portion of the supports, the screen moves up and down. Therefore, volume and weight of the portable screen device are reduced and the stability is increased.

Abstract: A motion image advertising system, coupled with an advertising dummy enlarging an object to be advertised such as a mobile phone, a video camera, or the like, is disclosed. The motion image advertising system includes a screen window and a display apparatus or a flat display installed to the rear side of the screen window and having a screen and a projector. The display apparatus is installed to a support. The support includes a fixing device and an advertising dummy attaching device, respectively installed to the advertising dummy device and the display apparatus to couple and separate the advertising dummy. The advertising dummy and the advertising motion image are simultaneously provided to consumers to increase advertising impact. If necessary, the advertising dummy device can be easily separated from the display apparatus such as the screen to be replaced.

Abstract: A screen for displaying an image projected from a beam projector. The screen base is formed with an incombustible metal sheet having silver-white colorfor displaying an image projected from a light source with nature color. A polished surface is formed on the screen base by polishing the screen base, so that the surface of the screen base has predetermined reflectivity. A surface hardening treatment is implemented on the surface of the screen base using a pickling treatment or an anodizing treatment. The surface reflection type screen formed with a non-combustible metal according to the present invention is excellent in surface hardness, corrosion resistance and acid-resistance so that the screen is easily repaired and maintained. In addition, the screen does not generate poisonous gas in case of fire, and also high quality of an image is displayed on the screen.

Abstract: Disclosed is a double-sided image film screen including a plastic material having a high optical transmission property and a light-refracting material, made of silica, having an optical transmission property and a refractivity of 1.4˜2.5, wherein a content and a particle size of the light-refracting material and a thickness of the film screen are designated such that an image incident on the film screen by means of light projected from a projector is dividedly displayed on front and rear surfaces of the film screen, thereby displaying the image formed thereon though the front and rear surfaces thereof, increasing the visibility of the image and eliminating a hot spot generated by a projection light source of the projector. Compared to conventional screens, the double-sided image film screen is advantageous in that it displays the image through the front and rear surfaces thereof.

Abstract: A multi-direction image viewing system includes a triangular or rectangular image case, and plural projectors symmetrically installed to the inner sides of the image case in three or four directions. Projecting light paths cross each other so that the size of the image case is reduced to 1/6.7 to ? of the size of the conventional image case. By reducing the weight of the image case through size reduction, the multi-direction image viewing system can serve as a mobile multi-direction image viewing system coupled with a trailer and transported by a small sized vehicle such as a motorcycle, as a wide viewing angle multi-direction image system attached to a wall and coupled with the safety fence of the bus terminal or the subway station, and as an image viewing system mounted to a ceiling or wall.

Abstract: The device relates to a wall roll-up screen of which the upper and the lower are attached with the upper short rod and the lower short rod, respectively, wherein the screen is constituted to be rolled up when not in use and to be unrolled when used, by the lower short rod; and the left and the right end of the upper short rod are mounted with steel structure of groove shaped ringscapable of coupling magnets and the left and the right end of the lower short rod are mounted with magnets to allow them to be coupled with the groove shaped rings of the left end and the right end of the upper short rod, upon rolling up the screen by the lower short rod and, if necessary, separating the magnets from the groove shape rings, thereby to obtain good portability and mobility of the screen, to prevent the screen from being twisted from side to side upon fixing the screen, and to improve aesthetic value of product.

Abstract: Disclosed are a spherical reflective screen for displaying an image and a method for manufacturing the screen. The screen has a spherical surface with a radius of curvature of a circle drawn centering around a point, and a focal length of the screen is the same as a projection length of a projector so that the projector is located at a focal point of the screen, thus allowing the image formed by means of light projected from the projector to be straightly reflected on the screen but ambient light to be diffused to the outside. A frictional surface and diffusing lines are simultaneously formed on an aluminum foil by rubbing the double-layered aluminum foils together in one direction, therefore, viewing angle and resolution of the screen are improved two times or more.