JPH0648505Y2 - A device for projecting images - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an apparatus for projecting light from a projector, a projector or the like to form an image.

[Prior Art] A conventional projection screen uses a white scattering surface so that an image from a projector such as a slide, an overhead projector, or a projector can be easily seen by people such as spectators, listeners, and visitors who face the screen. ing.

[Problems to be solved by the invention] However, in the conventional projection screen, the image is viewed from all the spectators, listeners, and visitors who are in an angle range of approximately ± 90 degrees measured from the direction perpendicular to the screen surface. However, in order to show objects, messages, etc. on the back side of the screen, the screen obstructs the field of view, so it is very complicated to move.

The present invention solves such a problem and provides a new screen whose projection angle can be controlled.

[Means for Solving Problems] The present invention provides a transparent light control film that selectively scatters only incident light within a predetermined angle range with respect to the film and transmits incident light at other angles. An optical screen which is made of a laminated body attached to the surface of the plate or inserted between a plurality of transparent plates, and is installed so as to be rotatable between a first position and a second position; A video projector placed in one of the spaces, and an exhibit or message display means placed in the other space separated by the screen, and the video projection when the screen is located in the first position. So that the light projected from the projector onto the screen is within the predetermined angle range, and when the screen is located at the second position, the image projector projects the light onto the screen. A device for projecting an image, characterized in that the incident light is out of the predetermined angle range, and selectively scattering only the incident light within the predetermined angle range with respect to the film, and other than that. An optical screen consisting of a laminate in which a light control film that transmits incident light at an angle of is attached to the surface of a transparent plate or is interposed between a plurality of transparent plates, and placed in one space separated by the screen. An image projector, and an exhibit or a message display means placed in the other space separated by the screen, wherein the screen is such that the light projected from the image projector onto the screen is within the predetermined angle range. And light directed from the display or message display means to any position on the screen is outside the predetermined angular range. DOO is a device for projecting an image, wherein.

According to one aspect of the predetermined angle range, at a position of a line where a predetermined virtual vertical plane standing on the screen intersects with the screen, an angle of incidence measured with respect to light incident perpendicularly to the line is expressed. It is preferably between 0 ° and 30 ° and 0 ° and 50 °.

There may be two or more predetermined angle ranges.
According to another aspect of the above-mentioned predetermined angle range, at a position of a line where a predetermined virtual vertical plane standing on the screen intersects with the screen, an incident angle measured with respect to light incident perpendicularly to the line. Expressed preferably between 30 ° and 90 ° and between 50 ° and 90 °.

One of the methods of using the screen of the above aspect is as follows. The image projected on the screen from the projector can be shown in front of the screen to the spectators located within 40 degrees each from the vertical front of the screen to the left and right, and from the original position (first position). By tilting it horizontally to, for example, 50 degrees and turning it to a second position, the audience can see objects, messages, etc. behind the screen through the screen. Further, one of the methods of using the screen of the above-mentioned other mode is as follows. For example, if the screen of the present invention is installed on the front of an exhibit and the image explaining the exhibit is projected at an incident angle of 60 degrees that scatters incident light from the projector to the screen, the above image will be displayed in front of the screen. Spectators that are outside the vertical front of the screen to the left and right, for example, each 40 degrees or more outside, can see the image on the screen, and the spectators move and are located inside the vertical front and the left and right of the screen, for example, within each 30 degrees. Then, you can see the exhibit on the other side through the screen. In this way, this screen can serve as the explanation panel and the protection panel for the exhibit at the same time. Moreover, if you set the above-mentioned specific angle range in the direction in which the observer is advancing,
Since visitors can read the explanations before observing the exhibits, they can also control the visitors.

The light control film used in the present invention is obtained by curing a resin composition composed of an oligomer and a monomer or monomers having different refractive indexes, preferably a photopolymerizable resin having a different refractive index. It can be obtained by irradiating a resin composition composed of an oligomer and a photopolymerizable monomer or a photopolymerizable monomer with ultraviolet rays to cure the resin composition. Regarding the angle dependency, the irradiation angle of ultraviolet rays, the difference in the bending ratio of the resin composition, etc. Determined by The thickness of the light control film used in the present invention is preferably 20-2000.
μm. The method for producing the light control film is described in the patent application, the patent application publication, and the Japanese Patent Laid-Open No.
No. 77001 "Light control plate and its manufacturing method", and the same publication, JP-A-63-309902 "Light control plate and its manufacturing method".

Furthermore, a transparent plastic plate or a glass plate can be used as the transparent plate used in the present invention. The transparent plastic plate is not particularly limited as long as it is transparent, and any one can be used. Suitable examples include polycarbonate resin, acrylic resin, methacrylic resin, polystyrene resin and the like. The glass plate used in the present invention may be float glass used for automobiles.

Further, in the present invention, the method of depositing the light control film and the transparent plate such as transparent plastic or glass plate is not particularly limited, and a known method can be used. For example, a light control film may be attached to the surface of a glass plate or a transparent plastic plate, a light control film may be sandwiched between a plurality of glass plates or transparent plastic plates, and a light control film may be sandwiched between glass plates. A plastic plate may be further adhered to the outer surface of the plate. It is preferable to provide a scratch-resistant coating on the outer surface of the plastic plate.

[Effect of the Invention] The apparatus for projecting an image of the present invention has the above-described structure, and the light control film may appear transparent or opaque depending on the angle at which the screen is viewed. Play. Therefore, as mentioned above, the audience, the audience,
It is possible to control the position of humans such as visitors, and it is also possible to easily see objects, messages, etc. behind the screen. Further, the screen of the present invention can be installed in the front of an exhibit, and it is considered that the screen can be used as a display panel and a protective panel at the same time while controlling the visitors.

[Embodiment] Next, an embodiment of an apparatus for projecting an image of the present invention will be described with reference to the drawings.

Example 1 100 parts of tribromophenoxyethyl acrylate (refractive index 1.567) and 100 parts of polyether urethane acrylate (refractive index 1.481) obtained by the reaction of polypropylene glycol having an average molecular weight of 2000, toluene diisocyanate and 2-hydroxyethyl acrylate, and 1 m of a resin composition prepared by adding and mixing 6 parts of benzyl dimethyl ketal
It was injected between two 60 cm x 120 cm glass plates placed horizontally with a m-thick spacer sandwiched therebetween. At a distance of 200 cm above the glass plate, one rod-shaped ultraviolet high pressure mercury lamp (80 W / cm, 2 kw, horizontally in a vertical plane standing on an imaginary line parallel to the short side of the glass plate approximately in the center of the glass plate surface, Luminous diameter about 2 cm, luminous length 2
5 cm, manufactured by Ushio Denki Co., Ltd.) was placed in parallel with the virtual line and the glass surface, and a lamp was irradiated for 3 minutes to obtain a cured laminate. As shown in FIG. 1 (A), the obtained laminated body is a light entering at an incident angle within 30 ° to the intersection of the virtual vertical plane standing parallel to the short side on the laminated body 1 surface and the laminated body. And the light having an incident angle larger than 30 ° was transmitted as shown in FIG. 1B. According to JIS K-6714, the total light transmittance of the laminate and the total light transmittance of the laminate were measured by an integrating sphere light transmittance measuring device. The scattered light transmittance was measured to determine the haze ratio (cloudiness value). The above value was calculated by inclining the laminated body around an axis parallel to its short side to allow light to be incident from a direction perpendicular to the short side and changing the angle between the incident light and the laminated body. The angle dependence of the haze ratio is shown in FIG. As shown in FIG. 2 (A), this laminated body is used for a slide, an overhead projector, a projector or the like as the projection screen 1 with the short side being vertical. Audiences, spectators within the angle range of 30 degrees from the front of the screen 1
The viewer A can see the image projected on the screen 1 from the projector 2. Then, by inclining the screen 1 in the horizontal direction, for example, by 50 degrees as shown in FIG. 2 (B),
A spectator can see objects, messages, etc. 3 behind the screen 1 through the screen 1.

Example 2 The same resin composition as in Example 1 was injected horizontally between two glass plates of 60 cm x 120 cm with a 1 mm thick spacer sandwiched between them and placed horizontally. At a distance of 200 cm above the glass plate, drawn from the line parallel to the short side of the glass plate at an angle of 30 ° in the same plane, drawn from the vertical plane standing on the imaginary line at the center of the glass plate plane, in the directions on both sides. Two rod-shaped UV high-pressure mercury lamps (both 80W /
cm, 2kw, emission diameter about 2cm, emission length 25cm, made by Ushio Denki)
A total of four pieces were installed parallel to the virtual line and the glass surface and parallel to each other, and the lamp was irradiated for 1 minute to obtain a cured sheet. The obtained cured sheet was measured on both sides from a vertical surface standing parallel to the length direction of the lamp from the glass surface at 30 °-
It was cloudy when viewed from an angle of 90 °, and transparent when viewed from other angles.

FIG. 3 shows the case where this laminated body is used as the front panel 4 of the exhibit, and the visitor B who is advancing the position inclined by 30 ° or more from the front of the front panel 4 is first projected from the projector 5. The description displayed on the front panel can be read, and then the visitor B'can see the exhibit 6 itself through the front panel 4 when coming to the front of the exhibit.

[Brief description of drawings]

1 (A) and 1 (B) are plan views illustrating the principle of the present invention, FIG. 2 is a plan view showing an embodiment of the present invention, and FIG. 3 is a plan view showing another embodiment of the present invention. FIG. 4 and FIG. 4 are graphs showing the angle dependence of the haze ratio of the laminate of FIG. Explanation of symbols 1,4 …… Screen of the present invention, 2,5 …… Projector, A, B, B ′…
… Audiences, spectators, visitors, 3 …… objects behind the screen,
Message, 6 ... Exhibit.

Front page continued (72) Toshifumi Tsujino, Toshifumi Tsujino, 4-chome, Doshomachi, Higashi-ku, Osaka City, Osaka, Japan Nihon Sheet Glass Co., Ltd. (72) Yoshitaka Takeuchi, 4-chome, Doshomachi, Higashi-ku, Osaka, Osaka In-house (72) Inventor Masazo Endo 4-8 Dosho-cho, Higashi-ku, Osaka-shi, Osaka Inside Nihon Sheet Glass Co., Ltd. (56) Reference Japanese Patent Publication 5-29117 (JP, B2)

Claims (4)

[Scope of utility model registration request] 1. A light control film, which selectively scatters only incident light within a predetermined angle range with respect to the film and transmits incident light at other angles, is attached to the surface of the transparent plate, or a plurality of light control films are attached. An optical screen, which is composed of a laminated body inserted between transparent plates and is installed so as to be rotatable between a first position and a second position, and is placed in one space separated by the screen. An image projector, and an exhibit or a message display means placed in the other space separated by the screen, and the light projected from the image projector onto the screen when the screen is located at the first position. Is within the predetermined angle range, and when the screen is located at the second position, the light projected from the image projector onto the screen is outside the predetermined angle range. Apparatus for projecting an image, characterized in that it has a certain way. 2. The predetermined angle range is expressed by an incident angle measured at a position of a line where a predetermined virtual vertical surface standing on the screen intersects with the screen and light incident perpendicularly to the line. An apparatus for projecting an image according to claim 1, which is between 0 ° and 30 ° and 0 ° and 50 °. 3. A light control film, which selectively scatters only incident light within a predetermined angle range with respect to the film and transmits incident light at other angles, is attached to the surface of the transparent plate, or a plurality of light control films are attached. , An optical screen comprising a laminated body interposed between transparent plates, an image projector placed in one space separated by the screen, and an exhibition or a message display placed in the other space separated by the screen. The screen is positioned such that the light projected from the image projector onto the screen is within the predetermined angular range, and the display or message display means is located at any position on the screen. A device for projecting an image, characterized in that light directed toward is outside the predetermined angle range. 4. The predetermined angle range is represented by an incident angle measured at a position of a line where a predetermined virtual vertical plane standing on the screen and the screen intersect with each other and light incident perpendicularly to the line. An apparatus for projecting an image according to claim 3, wherein the utility model registration is between 30 ° to 90 ° and 50 ° to 90 °.