JPH0239094A - Multidisplay - Google Patents

Abstract

PURPOSE:To two-picture-display two kinds of television images obtained from a single image display by switching light paths in synchronizing to a time division display action for two kinds of television images to be time-divison- displayed in a field unit. CONSTITUTION:A multidisplay 11 is composed of a CRT receiver 12 to time- division-display two kinds of television images of a television broadcasting image and the reproduced image of a video tape recorder 20 in the field unit and an optical separating means to display two kinds of television images projected on the CRT receiver 12 by spacely separating them. Namely, two kinds of television images to be time-division-displayed in the field unit are spacely separated by switching the light path sin synchronizing to the time division display action, and separated videos are visually recognized as images to be independent, respectively. Thus, tow kinds of television images obtained from the single image display can be two-picture-displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application] The present invention relates to a multi-display device that displays television images on two screens, which are time-divisionally displayed by a single image display device 11.

[Conventional technology 1] Today, as we enter the advanced information age, image display devices that display information as images are used in all kinds of daily life, regardless of genre, such as office use, home use, industrial use, or consumer use. These image display devices include not only video equipment such as video tape recorders and video disk players that have been used in general households for a long time, but also video tex and television devices. A variety of video information can be sent from various communication media such as text, CATV, and satellite broadcasting. By the way, when attempting to display television images from multiple video sources in parallel on -1 image display devices, generally,
P I F (Picture InPicLure)
Display devices with functions are often used.

The display device 1 with PIF function shown in FIG.
The screen of the I2T receiver 2 is divided into main screen and child screen areas, and the inset synthesis circuit 4 connected to the video output circuit 3 blanks a part of the main image and displays a counterprogram in the blank area. By inlaying and compositing child images such as , etc., it is configured to display a parent and child on two screens.

[Problems to be Solved by the Invention] The conventional bipedal display device I with PIF function has a configuration in which a child image is inserted and displayed in a parent image, so a part of the parent screen is obstructed by the child image and is difficult to see. , Moreover, since erasing the child image is the first requirement for displaying the entire parent image, it is impossible to view the parent and child images at the same time in the same size due to the display principle, and the CRT receiver 2 has a small parent screen itself.
However, there were problems in that the resolution of the sub-screen displayed by thinning out the scanning lines could not be obtained, and only a rough image could be seen from the sub-screen.

[,I1! Means for Solving the Problem J This invention solves the above problems, and includes a condolence image display device that displays two types of television images in a time-sharing manner on a field basis; The invention comprises an optical separation means that spatially separates two types of television images to be displayed by switching the optical paths in synchronization with the time-division display operation, and makes each of them visible as an independent image. This is a characteristic feature.

[Operation J] This invention spatially separates two types of television images that are time-divisionally displayed in field units by switching the optical path in synchronization with the time-division display operation, and separates the separated images into independent images. By making each image visible, two types of television images obtained from a single image display device are displayed on two screens.

[Examples] Examples of the present invention will be described below with reference to FIGS. 1 to 7. FIG. 1 is a schematic diagram showing an embodiment of the multi-display device of the present invention.

In Figure 1, a multi-display device! ■ is a television broadcast image and a reproduction image of the video tape recorder 20.
It consists of a CRT receiver aI2 that time-divisionally displays two types of television images in field units, and an optical separation means that spatially separates and displays the two types of television images projected on this CRT receiver II2. . The optical separation means shown in the embodiment includes a polarization switch n13 which is disposed facing the screen of the CRT receiver 12 and which switches the plane of polarization of light in synchronization with the time-division operation of the CRT receiver 12, and this polarization switch 13. A reflection m14 that guides the transmitted polarized light to a detour optical path that bypasses the original optical path, and a quarter-wave plate 15 that shifts the polarization plane of the polarized light reflected by the reflecting mirror 14 by 90 degrees, and a quarter-wave plate 15 that shifts the polarization plane of the polarized light that is the same on both left and right sides. One pair consists of polarized glasses 16 that are worn as if interposed between the original optical path and the detour optical path.

Video output circuit 1 that sends video signals to the CRT receiver 12
7 is connected to a tuner circuit I9 and a video tape recorder 20 via a changeover switch 18 that changes over at field intervals. In addition, the polarization switch 15 uses a liquid crystal plate having optical rotation which switches the plane of polarization according to the polarity of the applied voltage. Connected to power supplies E and -E. The changeover switches +8 and +21 are switched in conjunction with each other by a changeover circuit 22 triggered by a vertical synchronization signal separated from the output video signal of the tuner circuit 19.

However, the vertical synchronization signal of the television image reproduced by the video tape recorder 20 is generated by the tuner circuit! It is assumed that the vertical synchronization signal of the television image selected by 9 is automatically adjusted to have the same phase.

By the way, the two types of television images displayed on the CRT receiver I2 have polarization planes that differ by 90 degrees when transmitted through the polarization switch 13. Therefore, the television image (even field video) when the polarization plane switched by the polarization switch 13 matches the polarization plane of the polarized glasses 16 passes through the polarized silver w 116 and forms an image on the retina in the eyeball. do. On the other hand, polarization switching 'AI 4
The television image (odd field video) when the polarization plane switched by does not match the polarization plane of the polarized silver m16 is reflected as a result of the polarization plane being shifted by 90 degrees at the 1/4 wavelength plate 15! ! ! 14 passes through the polarized glasses 16 and forms an image on the retina within the eyeball. In other words, by wearing polarized glasses 16 that serve as a shield,
・The left and right images entering the field of view appear in the field of view, and with the help of the afterimage effect, two types of television images can be viewed at the same time.

In this way, the multi-display device 11 displays the television broadcast image sent from the tuner circuit 19 and the television image reproduced by the video tape recorder 20 on the same size screen after spatially separating them from each other. It is possible to display both television images in a non-ink race manner without significantly degrading the clarity. In addition, the polarization switch 1 has the property (optical rotation) of rotating two orthogonal vibration planes (polarization planes) of light.
3 can be driven in conjunction with the time-division display operation of the CRT receiver 12, so the two images can be easily separated. Furthermore, it is not limited to the combination of a television broadcast image and a reproduced image of the video tape recorder 20, but also a combination of television broadcast images or a reproduction image of the video tape recorder 20.
It is also possible to combine output images from other video equipment and television broadcast images. It is also possible to combine television broadcast images and videotex broadcast images, or to combine television broadcast images and teletext broadcast images.

Furthermore, by combining the television broadcast image and the mW control information image, it is possible to combine the television broadcast image and the control information image of the mW.
You can display control information in parallel, such as viewing television broadcast images on the one hand, and the operating status of automated household equipment (such as the level of bath water, the cooking status of an electromagnetic cooker, or the adjustment of an air conditioner) on the other. It is also possible to display control information images such as temperature) in parallel.

In the above embodiment, it was assumed that the polarized glasses 16 were used in a tube, but as in the multi-display device 31 shown in FIG. 2.3, polarized glasses are used! In place of 6, polarized light Fi, 32 which spans the original optical path and the reflected optical path may be used. In this embodiment, the 174 wavelength plate 15 and the polarization switch 13 are
Since the polarizing plates 32 are arranged vertically in a letter shape and fixed by tying the leg ends of the horizontal V-shape, two types of television images can be displayed in vertically adjacent positions.

Similarly, the multi-display device 41 shown in FIG.
By arranging the I/4 wavelength plate I5 and the polarization switch 13 in a horizontal V-shape to face each other on the left and right, two types of television images can be displayed at adjacent positions on the left and right. Furthermore, by slightly modifying this embodiment, as in a multi-display device 51 shown in FIG.
I3 and reflecting mirror 14 and I74 wavelength plate 15 and polarizing plate 3
By making the optical separating means consisting of 2 rotatable between the front and side surfaces of the CRT image receiver 11112, a two-screen display using the polarization switch 13 and a polarization switch 13 can be achieved.
The display of normal interlaced television images without the use of interlaced images can be made optional.

Furthermore, the multi-display device q6 shown in FIG.
As shown in +, the entire optical separation means except the polarization switch 13 can be moved forward and backward from the front side of the CRT receiver 12, and the left and right polarization planes of the polarized glasses 62 can be semi-fixedly switched. For example, by making the left and right polarization planes of the polarized glasses 62 different and viewing a stereoscopic television image captured while knowing the binocular parallax, polarization switching (13 and due to the glossy effect of the polarized glasses 62) is possible. , you can see stereoscopic images with a sense of perspective.

Furthermore, the multi-display device shown in FIG. 7, y17
1, the image magnified by the magnifying lens 73 disposed at the IFI of the projection type Cf1T receiver 72 is incident on the semi-transparent reflecting mirror 74 via the deflection switch 13, and the light transmitted through the semi-transparent reflecting mirror 74 is It is also possible to adopt a configuration in which the reflected light is guided to a pair of screens 7778 with polarizing plates installed side by side in the same direction via reflection m75 and 76, respectively. And in this case, a projection type CRT display device;'
In 172, an image is obtained by dividing one image horizontally or vertically, and by displaying the two images in a time-sharing manner, the original image has an angle of view twice that of the original image in the vertical or horizontal direction. It is possible to display a dynamic image close to that of a high-definition television receiver, which is different from the aspect ratio of current telepinodine receivers.

Note that in each of the above embodiments, the image display device is
In addition to the CRT receiver 12, 72, etc., a flat display device such as an EL matrix panel can be used.

[Effects of the Invention] As explained above, the present invention spatially separates two types of television images that are time-divisionally displayed on a field-by-field basis by switching the optical paths in synchronization with the time-division display operation. Since the separated images are configured so that they can be viewed as independent images, it is possible to separate two types of television images obtained from a single image display device into a two-screen display i゛. In addition, the two types of television images that the image display device displays in a time-division manner on a field-by-field basis can be divided into the all-defeated field and the even field and displayed in the same size. It can be displayed without much damage, and has excellent effects such as simple two-screen display without increasing cost.

In addition, the present invention allows two types of television images to be combined, such as television broadcast images or a television image and a video equipment output image, so that two channels of simultaneously broadcast television images can be viewed at the same time. Or, it is possible to simultaneously view a video cheap record or an image reproduced by a video disc player while viewing a television image.

In addition, by combining two types of Telepinotan images, television broadcast images and Videotex broadcast images, it is possible to use the information center or external computer registered by the user, similar to the Captain System. S! ! By receiving this information as a Videotex broadcast image and displaying it side by side with the TV image being broadcast, you can receive customer services such as home shopping and home banking, or display TV program schedules side by side. This has the effect of making program selection easier.

In addition, by combining television broadcast images and teletext broadcast images as 2PL type television images, it is possible to simultaneously view the television image being broadcast and the teletext broadcast image, and print information can be added to news programs and educational programs. By proactively introducing this, it will be possible to establish a multifaceted broadcasting media that utilizes images and text, among other effects.

In addition, by combining a television broadcast image and a device control information image as a 2F type television image, the television image and the control information indicating the usage status of the sending side, etc. can be displayed separately, or This has the advantage that, while viewing television broadcast images on the one hand, it is possible to separately view control information images indicating the operating status of household automation equipment on the other hand.

The present invention also provides an optical separation means including a polarization switch which is disposed facing the image display device and switches the polarization plane of light in synchronization with the time-division operation of the image display device, and a polarization switch which transmits the polarization plane through the polarization switch. By comprising four optical path branching means in the detour optical path that detours around the original optical path, and an analyzer that is provided in each of the original optical path and the detour optical path and selectively transmits only polarized light having a specific plane of polarization. By switching a polarization switcher that has the property (optical rotation) of rotating two orthogonal vibration planes (polarization planes) of light in conjunction with the time-sharing operation of the image display device, a specific polarization can be changed to t', j,
Furthermore, after optically separating the obtained polarized light, it is possible to transmit it through an analyzer that matches the polarized light, making it possible to easily separate two screens by driving only the polarization switcher. play.

Furthermore, by forming the optical path branching means adjacent to the position where the original optical path and the detour optical path enter a single field of view, two types of television images can be displayed at positions adjacent to each other vertically or horizontally, and the two types of television images can be displayed in adjacent positions vertically or horizontally. You can display multiple t+'l reports in parallel, or display information that changes from moment to moment, such as stock price information.
It is possible to simultaneously display as many brands as possible, and to comprehensively display information such as product information that stimulates the consumer's desire to purchase as they have more options to choose from. be effective.

In addition, by providing the polarization switch 4 on the front of the image display device so that it can move forward and backward, in addition to displaying two screens using the polarization switch, it is also possible to narrow down the image source to one and then remove the polarization switch. , it is possible to view a normal ink-laced television image, and moreover, it has the advantage of being able to be used selectively.

In addition, as an analyzer, polarized glasses whose left and right polarization planes can be semi-fixed are used. For example, by wearing polarized glasses with the same polarization plane on the left and right sides, it is possible to use polarized glasses from any position within a single field of view. In addition to viewing television images, for example, by wearing polarized glasses with different polarization planes on the left and right sides, you can view television images that have been captured as stereoscopic images. It has the advantage of being able to be used in a variety of ways.

In addition, on the image display device, two images obtained by dividing one image horizontally or vertically are displayed in a time-sharing manner, while the original optical path and the detour optical path are formed adjacent to each other in a single field of view. By configuring images to be displayed in a composite manner, a single image can be divided into two parts and these parts can be optically displayed in parallel. This allows for an angle of view that is twice that of the original image in the vertical or horizontal direction. It is possible to display an image with a dynamic image display having a different aspect ratio than that of a current television receiver, and it is possible to display a dynamic image close to that of a high-definition television receiver.

[Brief explanation of the drawing]

m1li0 is a schematic configuration diagram showing one embodiment of the multi-display device of the present invention, FIGS. 7 to 7 are schematic configuration diagrams showing modified examples of the multi-display device of the present invention, and FIG. 8 is a schematic configuration diagram showing an example of a conventional display device with a PfP function. 11.31.41.51.61.7+, , multi-display device, +2. ．． ．． CR'l' receiver. +3. , polarization switcher, 140. Reflector. +5. ,, I/4 wave plate, 16.62 Polarized glasses.

Claims (11)

[Claims] (1) A single image display device that time-divisionally displays two types of television images field by field, and a single image display device that time-divisionally displays the two types of television images that this image display device displays in synchronization with the time-division display operation. A multi-display device consisting of an optical separation means that spatially separates images by switching the optical paths and makes each image visible as an independent image. (2) The multi-display device according to claim 1, wherein the image display device uses a television broadcast image and a television broadcast image or a video equipment output image as video sources. (3) The multi-display device according to claim 1, wherein the image display device is configured to use television broadcast images and Videotex broadcast images as image sources. (4) The multi-display device according to claim 1, wherein the image display device uses television broadcast images and teletext broadcast images as video sources. (5) The multi-display device according to claim 1, wherein the image display device uses television broadcast images and device control information images as video sources. (6) The optical separation means includes a polarization switcher that is disposed facing the single image display device and switches the polarization plane of the light in synchronization with the time-division operation of the image source, and a polarization switcher that transmits the light through the polarization switcher. It is characterized by comprising an optical path branching means that guides the polarized light to a detour optical path that bypasses the original optical path, and an analyzer that is provided in the original optical path and the detour optical path and selectively transmits only polarized light having a specific plane of polarization. The multi-display device according to claim 1. (7) The multi-display device according to claim 6, wherein the optical path branching means is configured to form the original optical path and the detour optical path vertically adjacent to each other at a position within a single field of view. (8) The multi-display device according to claim 6, wherein the optical path branching means is configured to form an original optical path and a detour optical path adjacent to each other on the left and right at a position within a single field of view. (9) The multi-display device according to claim 6, wherein the polarization switcher is provided in front of the display device so as to be movable forward and backward. (10) The analyzer is a pair of polarized glasses in which the left and right polarization directions can be semi-fixed. 7. The multi-display device according to claim 6, wherein the multi-display device is configured to enable viewing of a stereoscopic image. (11) The image display device displays two images obtained by dividing one image horizontally or vertically in a time-sharing manner, and the optical separation means displays the two images in a single field of view before dividing. 2. The multi-display device according to claim 1, wherein the multi-display device is configured to display images adjacent to each other based on a positional relationship.