JPH06169444A - Video multi-picture projection system - Google Patents

Abstract

PURPOSE:To prevent the joint of pictures from being prominent at the time of the projection of a multi-picture. CONSTITUTION:A half mirror 12 is provided between the lens 13 of a liquid crystal projector 3A and a liquid crystal display 11. And also, the half mirror 12 is constituted so as to be rectangular, a half mirror processing part 12a whose transmissivity is 35-45% is formed along each side, and an almost transparent part 12b is formed at the inside. Thus, the lightness of the peripheral part of the picture of the liquid crystal display 11 is decreased 35-45%, and when the pictures are alternatively overlapped, the lightness is turned to almost 80%, and the pertinent lightness and the lightness of the other parts are almost equal, so that the joint of the pictures can not be prominent. And also, the processing can be executed by adding only the half mirror 12 and an attaching member or the like, so that a cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video multi-image projection system for projecting a plurality of video images on a screen, a so-called video multi-vision system.

[0002]

2. Description of the Related Art Video multi-image projection systems capable of displaying panoramic screens or multi-screens are known. That is, the panoramic screen is a screen in which a plurality of images are joined in a horizontal row to display a single horizontally long image, and the multi-screen is a screen in which a plurality of different images are arranged in a horizontal row and simultaneously displayed. Further, in the panorama screen, a process of overlapping a part of adjacent images is generally performed in order to prevent a gap from being formed in a joint portion of the images.

[0003]

However, there is a problem that when a part of images are overlapped with each other, the brightness of the part becomes higher than that of the other part and the seam becomes conspicuous. Therefore, various devices have been developed in order to improve this problem, but the structure is generally complicated. In addition, there is a problem that the operation of selecting the edit mode for selecting whether or not to superimpose the images is complicated, and since the screen is generally fixed, it becomes a hindrance when not used. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a video multi-image projection system in which a seam can be made relatively inconspicuous, an edit mode can be selected relatively easily, and a screen can be moved.

[0004]

To solve the above problems, according to the present invention, in claim 1, when a part of adjacent images are overlapped, the images of the overlapped parts have a transmittance of 3%.
5 to 45% of a half mirror, a translucent white member or a black member is transmitted and projected.

According to a second aspect of the present invention, there is provided an edit mode selecting means capable of selecting whether or not to superimpose a part of images.

According to a third aspect of the present invention, there is provided a hoist type screen which can be stored in a storage portion provided on the ceiling or the like.

[0007]

According to the first aspect of the present invention, the brightness of the image transmitted through the half mirror is reduced to 35 to 45%. Therefore, when the images after the transmission are alternately superposed, the brightness is the same as that of the other portions. The seams become less noticeable. The image transmitted through the translucent white member or the black member becomes white or black, so that the boundary between adjacent images becomes clear.

According to the second aspect of the present invention, it becomes possible to select the edit mode at hand by the edit mode selection means.

According to the third aspect of the invention, since the screen is of the hoist type, it can be rolled up and stored when the screen is not used, and the space can be effectively utilized.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a video multi-image projection system according to the present invention. The video multi-image projection system 1 includes a control device 2 for controlling the entire system, three liquid crystal video projection devices (hereinafter, referred to as liquid crystal projectors) 3A to 3C, a screen 4, an opaque projector 5, and a video camera. 6 and 5 speakers 7A to 7E, and an external microphone 8.

Further, the control device 2 has an edit mode selection device 2A as an edit mode selection means for selecting whether or not to superimpose a part of images, and an external input amplifier for amplifying the output signal of the opaque projector 5. 2B and an external input amplifier 2C for amplifying the output signal of the video camera 6
And 3 video recording / reproducing devices (hereinafter referred to as VCRs) 2D to 2F, a compact disc player (hereinafter referred to as CD player) 2G, and a magnetic tape recording / reproducing device (hereinafter referred to as cassette deck) 2H. When,
The speakers 7A through 7 are provided by amplifying the output signals of the CD player 2G, the cassette deck 2H or the microphone 8.
Amplifier 2I for driving E and the liquid crystal projector 3A
To 3C, an input selector 2J for controlling connection and selection of an edit mode, and a maintenance panel (not shown) for operating switching of these.

With this configuration, the three video decks 3
A to 3C, opaque projector 5, video camera 6
Any one of the images is selected and the liquid crystal projector 3A is selected.
To 3C, the image is projected on the screen 4. Further, as for sound, an output signal of the CD player 2G, the cassette deck 2H or the external microphone 8 is reproduced by the speakers 7A to 7E via the amplifier 2I. That is, three images are horizontally projected on the screen 4.

For example, three images output from the video decks 2D to 2F may be projected on the screen 4 via the liquid crystal projectors 3A to 3C,
Two images output from the video decks 2D and 2E and one image output from the opaque projector 5 may be projected via the projectors 3A to 3C. In this way, the combination of images input to the liquid crystal projectors 3A to 3C can be freely changed by the input selector 2J.

It is also possible to add a slide projector (not shown) or the like to project a photographic image through the liquid crystal projectors 3A to 3C. For example, the opaque projector 5 is used to project a frog anatomical diagram, the video deck 2D is used to project a frog ecological video that inhabits a pond or a river, and the slide projector is used to perform several steps of growing a frog from spawning to tadpole. The explanation will be more concrete if it is divided into photographs and sequentially projected.

The numbers of the projectors 3A to 3C, the video decks 2D to 2E, and the speakers 7A to 7E can be set arbitrarily. Therefore, the number of images is not limited to three, and any number can be set, and the images may be arranged not only in a horizontal row but also in a vertical direction in a grid pattern. Further, the CD player 2G, the cassette deck 2H, the opaque projector 5, the video camera 6, and the external microphone 8 may be omitted if they are not necessary. Also, the screen 4
Is formed in a flat shape, but it may be slightly curved to the left and right. The curved shape makes it easier for spectators near the left and right sides to see the screen.

FIG. 2 is a conceptual diagram of a panoramic screen by three liquid crystal projectors. Images P1 to P3 projected on the screen 4 by the liquid crystal projectors 3A to 3C are partly overlapped with each other to form overlapping portions P12 and P23.

FIG. 3 is a conceptual diagram of a multi-screen with three liquid crystal projectors. In this case, the images are not superposed.
Therefore, it is suitable when different images are simultaneously projected.

FIG. 4 is a sectional view of the periphery of the lens of the liquid crystal projector. The lens unit 10 of the liquid crystal projectors 3A to 3C includes a liquid crystal display unit 11 provided on the liquid crystal projector bodies 3A to 3C, a half mirror 12 provided on the front surface of the liquid crystal display unit 11, and projection lenses 13 to 17. , And the lens supporting cylinder 18. The half mirror 12 is provided with rail portions 18 provided at two positions above and below the inner wall of the lens supporting cylinder 18.
It is configured to be slidably supported by a and 18b in a direction that vertically penetrates the paper surface, and can be removed from the lens surface when unnecessary. Also, the extraction operation may be manual,
The half mirror 12 may be slid and pulled out by a motor or the like (not shown).

FIG. 5 is a block diagram of the half mirror 12.
The half mirror 12 is a half-mirror processed member having relatively high transparency such as glass. This half mirror 1
Reference numeral 2 denotes a rectangular member having a size that fits within the surface of the lens 13. A half mirror processing portion 12a having a transmittance of 35 to 45% is formed along each side, and the inside thereof is a substantially transparent transparent portion. 12b is formed.

FIG. 6 is an illustration of seamless processing. Seamless processing refers to processing that makes the seams inconspicuous. In FIG. 6, this seamless processing is applied to the panoramic screen. This panorama screen has three images P1 to P3.
The image is formed by superimposing a part of one image, and overlapping portions P12 and P23 are formed in the vertical direction of the screen.

By the way, the overlapping portions P12 and P23 correspond to the peripheral portions of the images P1 to P3 obtained through the half mirror processing portion 12a. That is, the image P
The brightness of the peripheral portions 1 to P3 is the half mirror processing unit 1
As a result of passing through 2a, it is reduced to 35 to 45% as compared with the inside of the image. Therefore, the images P1 to P
When 3 is piled up alternately, the brightness becomes about 80% and the seam is not felt. Although 100% seems to be preferable in calculation, this value is generally preferable in the case of a video image.
Since the brightness is reduced by using the half mirror as described above, the seams of the images can be made relatively inconspicuous. Further, if a zoom lens is used as the lens unit 10, the size of the projected image can be changed, so that it is easy to adjust the superposition.

FIG. 7 is a flow chart showing the operation of the editing mode selection device 2A. First, the operator selects in S1 whether or not to perform seamless processing. The selection is performed by a push button switch or the like provided on a maintenance panel (not shown) of the control device 2. When performing seamless processing, the process proceeds to S2, and the half mirror 12 is set on the lens portion 10 of the predetermined liquid crystal projectors 3A to 3C. Then S
Proceeding to step 3, the zooming switch provided on the maintenance panel is used to operate the lens unit 10 to adjust the size of the image to be projected and to superimpose the adjacent images. On the other hand, when seamless processing is not performed, the process proceeds to S4, and the half mirror 12 is removed from the lens unit 10. Next, in S5, the zooming switch is used to operate the lens unit 10 to align the edges of adjacent images.

Since the edit mode can be selected from the maintenance panel as described above, the operation is relatively easy, and the screen can be switched flexibly, so that the effect of production can be enhanced.

Although a case where a zoom lens is used as the lens unit 10 has been described, in the case of a fixed focus lens, if the liquid crystal projectors 3A to 3C themselves are configured to be movable back and forth with respect to the screen 4 by a predetermined range, an image is displayed. The size of can be changed.

When the semi-transparent white member 31 having the semi-transparent white portion 31a or the black member 32 having the black portion 32a is used instead of the half mirror 12, the peripheral portion of the image becomes white or black and is adjacent. The boundaries of the image to be displayed become clear. Therefore, by simply replacing the half mirror 12 with the semi-transparent white member 31 or the black member 32, the seamless panoramic screen can be switched to the multi-screen. Furthermore, if the half mirror 12, the semitransparent white member 31, and the black member 32 are linked to form a single member, the members can be switched by simply sliding the member, so that the operability is improved.

FIG. 8 is a schematic external view of the hoist type screen. The hoist type screen 20 maintains the screen 4 formed of a bendable member such as synthetic fiber or resin, the winding pipe 21 that winds the upper end portion 4 a of the screen 4, and the flatness of the screen 4. Therefore, a weight bar 22 provided at the lower end portion 4b, a storage portion 23 for winding and storing the screen 4, a motor and gear portion 24 for rotating the pipe 21 to wind the screen, and And a control unit 26 that controls the drive unit 25 to rotate or stop the motor. Further, the screen 4 is provided with a white background portion (white or gray or the like) 4c for projecting an image and a black frame portion 4e.

That is, the control unit 26 controls the screen 4
When the screen 4 is not used, it can be rolled up and stored in the storage portion 23 by controlling the upper and lower sides of the screen 4 without causing any hindrance. Also, it is suitable when a new screen is added using the existing equipment as it is, and the size can be set according to the size of the room. On the other hand, since the storage portion 23 is provided, the screen 4 can be protected from dust and the like, and if the storage portion 23 is covered with the lid, the screen 4 in the rolled-up state cannot be seen from the outside, and the aesthetic effect can be improved. .

[0028]

According to the first aspect of the invention, the brightness of the images is reduced by using the half mirror, and the lowered images are overlapped with each other. Therefore, the seams of the images are relatively inconspicuous. You can Further, when a semi-transparent white member or a black member is used instead of the half mirror, the boundary of the image can be made clear. Therefore, the panoramic screen seamlessly processed can be switched to the multi-screen by simply replacing the half mirror with a translucent white member or a black member, and the operability is improved. In addition, the cost can be reduced because it can be realized with a relatively simple structure.

According to the invention of claim 2, since the edit mode selecting means is provided, the edit mode can be easily selected.
Since it is possible to change screens flexibly, it is possible to enhance the effect of production.

According to the third aspect of the present invention, since the screen is of a roll-up type, it can be rolled up and stored in the storage portion when it is not in use, which is not an obstacle. Further, by storing the screen in the storage portion, the screen can be protected from dust and the like. Furthermore, since the screen in the rolled-up state is difficult to see from the outside, the aesthetic effect can be improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a video multi-image projection system according to the present invention.

FIG. 2 is a conceptual diagram of a panoramic screen by three liquid crystal projectors.

FIG. 3 is a conceptual diagram of a multi-screen with three liquid crystal projectors.

FIG. 4 is a cross-sectional view around a lens of a liquid crystal projector.

FIG. 5 is a configuration diagram of a half mirror.

FIG. 6 is an explanatory diagram of seamless processing.

FIG. 7 is a flowchart showing the operation of the edit mode selection device.

FIG. 8 is a schematic external view of a winding screen.

[Explanation of symbols]

1 ... Video multi-image projection system, 2 ... Control device,
2A ... Edit mode selection device, 3A-3C ... Liquid crystal type video projection device, 4 ... Screen, 12 ... Half mirror,
12a ... Half mirror processing section, 18a, 18b ... Rail section, 20 ... Winding screen, 21 ... Winding pipe,
22 ... Weight bar, 23 ... Storage part, 31 ... Semi-transparent white member, 31a ... Semi-transparent white part, 32 ... Black member, 32
a: Black portion.

Claims (3)

[Claims] 1. In a video multi-image projection system for simultaneously projecting a plurality of images on a screen, when a part of adjacent images are overlapped, the image of the overlapped part is a half mirror having a transmittance of 35 to 45%, A video multi-image projection system characterized by being projected through either one of a translucent white member and a black member. 2. The video multi-image projection system according to claim 1, further comprising edit mode selection means capable of selecting whether or not to superimpose a part of images. 3. The video multi-image projection system according to claim 1, further comprising a hoist type screen which can be housed in a housing provided on a ceiling or the like.