JP2007178582A - Method for displaying projector video image, and display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable lectures of different subjects that uses videos on a single screen, or conferences and lectures concerning different themes, using videos. <P>SOLUTION: A display system is composed of one screen 8; a plurality of projector devices 6, 9 for projecting to overlap the videos different in contents toward the screen 8; polarizing filters 7, 10 arranged with the direction of a polarizing axis changed at each projector; a plurality of polarizing filter spectacles 11, 12 by possessing the direction of a polarizing axis, corresponding to the direction of each polarizing axis of the polarizing filters 7, 10 and for separately viewing a plurality of the videos displayed on the screen 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is used when a lecture is given by displaying videos of different subjects on one screen provided in a classroom, or when a meeting or lecture is given by displaying videos of different themes on one screen. The present invention relates to a projector video display method and display system that are suitable for the above.

  2. Description of the Related Art Conventionally, projectors are used when classes based on video information are performed at various schools.

  Currently, projector methods are roughly classified into a) 3LCD method, b) DLP method, and c) LCOS method.

  a) In the 3LCD system, light emitted from a lamp is separated into three colors RGB using a dichroic mirror, and transmitted through three liquid crystal panels assigned exclusively to the respective colors. Are combined and projected on the screen.

  b) The DLP system uses DMD (Digital Micromirror Device), a semiconductor in which hundreds of thousands to hundreds of thousands of micron-sized micromirrors are arranged as a display device. It corresponds. In this method, light from a light source is sequentially switched to R (red), G (green), and B (blue) by a color wheel, and reflected on a single plate DMD to project an image on a screen.

  c) The LCOS system uses LCOS (Liquid Crystal On Silicon) as a display device, takes advantage of the characteristics of high-resolution elements, reflects light from the light source to the LCOS, and projects an image on the screen. Yes.

  However, in the video system using the projector described above, when different subjects are taught using videos, a plurality of classrooms must be arranged for installing a projector and a screen for each subject.

  For example, even if the number of students taking a certain subject is extremely small, it is necessary to always divide the classroom as long as the video information is different. For this reason, there is a problem that it is difficult to construct a class using a projector in a school where the number of classrooms is limited.

  The present invention has been made in consideration of the problems in the class using the conventional projector as described above, and is used in different subjects on different screens, different lecture contents, or conferences. The present invention provides a projector image display method and a display system that can simultaneously display a theme image and allow a viewer to separately view a desired image.

  The projector image display method according to the present invention displays images having different contents from a plurality of projectors by superimposing them on the same screen through polarization filters having different polarization axis directions, and corresponding to the directions of each polarization axis of the polarization filter. The gist is that a plurality of images displayed on a screen are separated and viewed using a plurality of polarizing filter glasses having a polarization axis direction.

  A projector image display system according to the present invention includes a single screen, a plurality of projectors that project images having different contents on the screen, and a polarization filter provided by changing the direction of the polarization axis for each projector. The gist of the present invention is that it comprises a plurality of polarizing filter glasses having a polarization axis direction corresponding to the direction of each polarization axis of the polarizing filter and separately viewing a plurality of images displayed on the screen.

  In the above display system, when two projectors are provided, a polarizing filter whose polarization axis direction intersects at 90 ° can be used.

  Moreover, it is preferable to use the silver screen which apply | coated metal powder as a screen in the said display system.

  According to the projector image display method and display system of the present invention, there is an advantage that a lecture of a plurality of subjects and a meeting or a lecture on a plurality of themes can be made possible in one room.

  Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

  FIG. 1 shows the principle of a display system to which a projector image display method according to the present invention is applied.

  In the following description, a case where a lecture is given by projecting two different subjects simultaneously on one screen installed in a classroom will be described as an example.

  In the figure, in a projector video display system (hereinafter abbreviated as a display system) 1, a first camera 2 is for photographing a subject A photographed as a teaching material of a first subject, for example. The first camera 2 is connected to a first recording / reproducing apparatus 3 constituted by a DVD (Digital Verrsatile Disk) recording / reproducing apparatus, for example, with a VTR, and the video of the subject A photographed by the first camera 2 is first recorded. It is recorded on the playback device 3.

  On the other hand, the second camera 4 is for photographing the subject B photographed as a teaching material for the second subject, and the video photographed by the second camera 4 is also composed of a VTR and a DVD recording / reproducing apparatus. It is recorded on the second recording / reproducing apparatus 5.

  In the case where video information recorded in advance on a CDR (Compact Disk Recordable) or DVD is used as the teaching material for the first subject (or the teaching material for the second subject), the first camera 2 and the second camera 4 are used. Can be omitted from the display system 1.

  In addition to the above, input side devices connected to the first and second recording / reproducing devices 3 and 5 include digital cameras, desktop personal computers or notebook personal computers, laser disc players, video movies, and the like.

  The first recording / reproducing device 3 is connected to a first projector device 6.

  The first projector device 6 includes a liquid crystal display panel 6a made of a single-plate amorphous silicon TFT (Thin Film Ttansistor) as a display device. The light from the lamp 6b is decomposed into RGB by a rotating prism 6c, and the liquid crystal display panel. 6a is incident.

  An image projected from the liquid crystal display panel 6a through the lens 6f is further projected onto the screen 8 through the first polarizing filter 7 disposed in the vicinity of the lens 6f. In the figure, reference numerals 6d and 6e denote lenses.

  The screen 8 can be constituted by a so-called silver screen coated with a metal powder such as aluminum, for example, but can be substituted with a coating of silver paint on the wall surface.

  On the other hand, the second recording / reproducing apparatus 5 is connected to the second projector apparatus 9.

  The configuration of the second projector 9 is basically the same as that of the first projector device 6, and includes a liquid crystal display panel 9a, a lamp 9b, a rotating prism 9c, and lenses 9d to 9f.

  A second polarizing filter 10 is disposed in the vicinity of the lens 9 f, and an image from the second projector device 9 is projected onto the screen 8 through the second polarizing filter 10.

  However, the direction of the polarization axis in the first polarizing filter 7 and that of the second polarizing filter 10 are arranged to intersect at 90 °. For example, an image projected from the first projector device 6 is directed to the screen 8. The image that is polarized in the horizontal direction (C direction) and projected from the second projector device 9 is polarized in the vertical direction (D direction) with respect to the screen 8.

  In this way, on the same screen 8, videos with different contents, that is, a video of the subject A and a video of the subject B are displayed in an overlapping manner.

  However, since the subject A and the subject B are seen in a blurred state as they are, the viewer cannot recognize the image projected on the screen 8.

  Therefore, polarizing filter glasses 11 having a polarization axis direction corresponding to the polarization direction C and polarization glasses 12 having a polarization axis direction corresponding to the polarization direction D are distributed to students in the classroom. For example, polarizing filter glasses 11 are provided for students who take the first subject, and polarizing filter glasses 12 are provided for students who take the second subject.

  The polarizing filter glasses 11 can see only an image polarized in the horizontal direction (C direction), and the polarizing filter glasses 12 can see only an image polarized in the vertical direction (D direction). It can be done.

  As a result, the students who were given the polarizing filter glasses 11 while looking at the common screen 8 were able to see the video relating to the first subject (Subject A) separated, while the polarizing filter glasses 12 were given. The student can see the video related to the second subject (Subject B) in a separated state.

  Moreover, in the present invention, unlike a conventional screen, one screen is not divided into right and left to display a plurality of images, but different images are projected on one screen 8 so as to be projected. The student who sees the image can sit in a mixed state in front of the screen 8 without any restriction on the seating position.

  In the above embodiment, the polarizing filter whose polarization axis direction intersects the horizontal direction and the vertical direction at 90 ° is used. However, the polarization axis direction is not limited to this, and a so-called mountain having 45 ° to the left and 135 ° to the right is used. It may be a mold.

  In addition, in the case where audio is included in the video as teaching materials, it is only necessary to provide each student with earphones or headphones in addition to the polarizing filter glasses 11 (or 12).

It is a block diagram which shows the structure of the display system using the projector which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display system 2 1st camera 3 1st recording / reproducing apparatus 4 2nd camera 5 2nd recording / reproducing apparatus 6 1st projector apparatus 6a Liquid crystal display panel 6b Lamp 6c Rotating prism 6d-6f Lens 7 1st polarizing filter 8 Screen 9 9th 2 projector device 9a liquid crystal display panel 9b lamp 9c rotating prism 9d to 9f lens 10 second polarizing filter 11 polarizing filter glasses 12 polarizing filter glasses

Claims (4)

  Multiple polarizing filters with different polarization axis directions corresponding to the direction of each polarization axis of the polarization filter, displaying different images from multiple projectors on the same screen through polarization filters with different polarization axis directions. A method for displaying a projector image, wherein glasses are used to separate and view a plurality of images displayed on the screen. One screen,
Multiple projectors that project images with different contents on this screen,
A polarizing filter provided by changing the direction of the polarization axis for each projector;
A projector image comprising a plurality of polarizing filter glasses having a polarization axis direction corresponding to the direction of each polarization axis of the polarizing filter and separately viewing the plurality of images displayed on the screen. Display system.   The projector image display system according to claim 2, wherein the projector image display system has two projectors, and the direction of the polarization axis of each polarizing filter intersects 90 °.   4. The projector image display system according to claim 2, wherein a silver screen coated with metal powder is used as the screen.

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