JP2001272964A - Multi-video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate differences among plural videos, to simplify the adjustment of A/D converters and to dispense with the video distributor needed in the conventional practice in a multi-video display device. SOLUTION: An A/D converter 20, an SAP converter 21, a changeover switch 22, a pixel converter 23, a digital display device 25 and a P/S converter 24 are provided respectively in each video display device 26 and the changeover switch 22 of the first video display device 26 is connected to the A/D converter 20 side and as to video display devices 26 to 26 from the second device to the Nth device, the changeover switch 22 is connected to the S/P converter 21 side and the output side of the P/S converter 24 of a front-stage video display device 26 is coupled to the input side of the S/P converter 21 of a rear-stage video display device 26 and multiple screens are displayed by inputting an analog video signal to the A/D converter 20 of the first video display device 26 and the converting of the inputted analog video signal into a digital video signal is performed only in the A/D converter 20 of the first video display device 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-image display device for displaying a multi-screen with N (N is an integer of 2 or more) image display devices.

[0002]

2. Description of the Related Art Conventionally, this kind of multi-image display device has
As shown in FIG. 3, a plurality of display devices 13a, 1
, 13n, and the analog video distributor 14
And consisted of The analog video distributor 14 includes a plurality of amplifiers 14a, 14b, 14c,.
Each of the amplifiers 14a, 14b, 14c,..., 14n amplifies an analog video signal input to the analog signal input terminal 10 and a corresponding display device 13a, 13b, 1
3c,..., 13n. Display device 13a
4 includes an A / D (analog / digital) converter 15a, a pixel converter 16a, and a digital display device 17a, as shown in FIG. 4, and an analog video signal amplified by the amplifier 14a by the A / D converter 15a. Is converted into a digital video signal, and A / A is converted by the pixel converter 16a.
The digital video signal output from the D converter 15a is enlarged / reduced, and a corresponding video (for example, a partially enlarged video) is displayed on the digital display device 17a. The other display devices 13b, 13c,..., 13n are configured similarly to the display device 13a, and correspond to the corresponding digital display devices 17b, 17c,.
(For example, a partially enlarged image) is displayed. Then, a multi-screen (for example, an enlarged image) is displayed as a whole.

[0003]

However, in the conventional example shown in FIG. 3, since the characteristics of the plurality of amplifiers 14a, 14b, 14c,... , 13b, 1
There is a problem that a difference occurs in the display images among 3c,..., 13n (for example, a difference in luminance and color occurs), and it is necessary to visually adjust one by one to make them match. That is, the differences in the characteristics of the amplifiers 14a, 14b, 14c,..., 14n cause differences in the amplitude, waveform, and delay amount of the video signal distributed by the analog video distributor 14, so that each of the display devices 13a, 13b, 13c. ,…,
A / D converters 15a, 15b, 15c,.
There is a problem that the sample phase at the time of A / D conversion of 15n, the position of image capture, the image gain before A / D conversion, and the like must be finely adjusted. Since the analog video distributor 14 is required in addition to the plurality of display devices 13a, 13b, 13c,..., 13n, the number of components is increased, and the analog video distributor 14 is used to display the respective display devices 13a, 13b, 13c. ,..., 13n, there is a problem that the length of wiring required becomes long.

On the other hand, in order to prevent a problem caused by a mismatch between the characteristics of a plurality of amplifiers 14a, 14b, 14c,..., 14n in the analog video distributor 14, the analog video distributor 14 shown in FIG. Can be considered, but there is still a problem that the digital video distributor 12 is still required, and the A / D converter 11 is required in the preceding stage. That is, an analog video signal input to the analog signal input terminal 10 is converted into a digital video signal by the A / D converter 11, and the video signal is distributed to four video signals by the video distributor 12.
Corresponding display devices 13a, 13b, 13c, 1
Since it was supplied to the 3d pixel converters 16a, 16b, 16c and 16d to display a multi-screen (enlarged image) composed of four partially enlarged images as shown in the figure, the four display devices 13a, 13b, 13c, A / D besides 13d
There is a problem that the converter 11 and the video distributor 12 are required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to eliminate a difference (for example, a difference in luminance or color) between displayed images between image display devices, and to adjust an A / D converter. It is an object of the present invention to provide a multi-image display device which can be simplified and which does not require an image distributor.

[0006]

According to a first aspect of the present invention, there is provided a multi-image display device for displaying a multi-screen on N (N is an integer of 2 or more) image display devices, wherein each of the N image display devices An A / D converter for converting an analog video signal to a digital video signal; and an S / P for converting a digital video signal from a serial signal to a parallel signal.
(Serial / parallel) converter, A / D converter and S /
A changeover switch for switching and outputting a video signal output from the P converter, a digital display for displaying a corresponding video based on the video signal output from the changeover switch, and a parallel signal for outputting the video signal output from the changeover switch (Parallel / serial) converter for converting the data into a serial signal, and for the first video display device among the N video display devices, the switching side of the changeover switch is set to the A / D converter side And for the second to Nth video display devices, the switching side of the changeover switch is connected to the S / P converter side, and the output side of the P / S converter of the preceding video display device is connected. S / P of the subsequent image display device
Coupled to the input side of the converter, the A of the first video display device
A multi-screen is displayed by inputting an analog video signal to the / D converter.

In the above configuration, the analog video signal input to the first video display device is converted into a digital video signal by the A / D converter, and is input to the digital display via the changeover switch. The corresponding video is displayed. The digital video signal converted into a serial signal by the P / S converter of the first video display device is converted into a parallel signal by the S / P converter of the second video display device, and is converted by the digital display. The corresponding video is displayed. The digital video signals input to the second and subsequent video display devices are converted into parallel signals by the S / P converter, and the corresponding video is displayed on the digital display. Since the conversion of the input analog video signal to the digital video signal is performed only by the A / D converter of the first video display device,
The adjustment in the A / D converter is performed at one place, and the adjustment is simplified. Also, since the video signals sequentially transmitted from the first video display device to the Nth video display device are serial signals, the number of signal lines connecting the N video display devices can be reduced. it can. Further, since the video distributor is not required, the number of required components can be reduced, and the length of wiring required to each video display device can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the connection between the N video display devices is facilitated, and the input of the analog video signal to the first video display device is facilitated. In each of the video display devices, an analog signal input terminal for capturing an analog video signal input from the outside and outputting it to the A / D converter, and a digital video signal output from the preceding video display device are captured. A digital signal input terminal for outputting to an internal S / P converter, and a digital signal for outputting a digital video signal output from the internal P / S converter to a digital signal input terminal of a subsequent video display device An output terminal is provided.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, a corresponding partial enlarged image is displayed by each of the N image display devices, and a multi-screen (enlarged image) that becomes one screen as a whole is displayed. To be able to display,
A pixel converter is provided between the changeover switch and the digital display in each video display device, and the pixel converter performs enlargement processing of the video signal output from the changeover switch, and displays the corresponding partially enlarged image on the digital display. I do.

According to a fourth aspect of the present invention, there is provided a multi-image display apparatus for displaying a multi-screen by N image display apparatuses,
In the first video display device among the video display devices,
A / D converter for converting an analog video signal to a digital video signal, S / P converter for converting a digital video signal from a serial signal to a parallel signal, A / D converter and S / P converter A switch that switches and outputs a video signal output from the switch, a digital display that displays a corresponding video based on the video signal output from the switch, and a video signal that is output from the switch from a parallel signal to a serial signal. A P / S converter for converting the digital video signal from a serial signal to a parallel signal for each of the second to Nth video display devices out of the N video display devices. / P
A digital converter for displaying a corresponding video based on a video signal output from the S / P converter;
And a P / S converter for converting a video signal output from the / P converter from a parallel signal to a serial signal. For the first video display device, the switching side of the switch is set to A / S.
For the second to Nth video display devices connected to the D converter side, the output side of the P / S converter of the preceding video display device is connected to the S / P converter of the subsequent video display device. It is coupled to the input side and is characterized in that an analog video signal is input to the A / D converter of the first video display device to display a multi-screen.

In the above configuration, the analog video signal input to the first video display device is converted into a digital video signal by the A / D converter, and is input to the digital display via the changeover switch. The corresponding video is displayed. The digital video signal converted into a serial signal by the P / S converter of the first video display device is converted into a parallel signal by the S / P converter of the second video display device, and is converted by the digital display. The corresponding video is displayed. The digital video signals input to the second and subsequent video display devices are converted into parallel signals by the S / P converter, and the corresponding video is displayed on the digital display. For this reason,
In addition to having the same effect as the first aspect of the present invention, the second to the Nth video display apparatuses are different from the first aspect in that the A / D converter and the changeover switch are omitted to reduce the circuit configuration. It can be simplified.

According to a fifth aspect of the present invention, in accordance with the fourth aspect of the present invention, a corresponding partial enlarged image is displayed by each of the N image display devices, and a multi-screen (enlarged image) that is one screen as a whole can be displayed. In order to achieve this, a pixel converter is provided between the changeover switch in the first video display device and the digital display, and the S / P converters in the second to Nth video display devices are provided. A pixel converter is provided between the digital displays, and a video signal is enlarged by each of the pixel converters, and a corresponding partially enlarged image is displayed on the digital display.

According to a sixth aspect of the present invention, there is provided a multi-image display device for displaying a multi-screen with N image display devices,
An S / P converter for converting a digital video signal from a serial signal to a parallel signal, and a digital for displaying a corresponding video based on the video signal output from the S / P converter. Display and S / P
A P / S converter for converting a video signal output from the converter from a parallel signal to a serial signal; a serial digital video signal being input to the S / P converter of the first video display device; For the Nth to Nth video display devices, the multi-screen is displayed by connecting the output side of the P / S converter of the preceding video display device to the input side of the S / P converter of the subsequent video display device. It is characterized by doing.

In the above configuration, when a serial digital video signal is input to the S / P converter of the first video display device, it is converted into a parallel signal by the S / P converter and input to the digital display. The corresponding video is displayed. When the digital video signal converted to a serial signal by the P / S converter of the first video display device is input to the S / P converter of the second video display device, the S / P
The signal is converted into a parallel signal by the converter, and the corresponding image is displayed on the digital display. The digital video signals input to the second and subsequent video display devices are converted into parallel signals by the S / P converter, and the corresponding video is displayed on the digital display. For this reason, the same effect as that of the first aspect can be obtained, and the circuit configuration can be simplified as compared with the first aspect. That is, when the input video signal is an analog signal, one A / D converter and one P / S converter are required in addition to the N video display devices. Since the / D converter and the changeover switch can be omitted, the circuit configuration can be simplified as a whole.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, a corresponding partially enlarged image is displayed by each of the N image display devices, and a multi-screen (enlarged image) that is one screen as a whole can be displayed. For this purpose, a pixel converter is provided between the S / P converter and the digital display in each video display device, and the pixel converter performs an enlargement process of a video signal output from the S / P converter. The corresponding partially enlarged video is displayed on the digital display.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a multi-image display device according to the present invention. In FIG.
, 26 are N for displaying a multi-screen.
In each of the video display devices, each video display device 26 is configured to have the same structure, and is configured to be used alone as shown in FIG.

In FIG. 1, each video display device 26 has an analog signal input terminal 10 and a digital signal input terminal 18.
And a digital signal output terminal 19,
A / D converter 20, S / P converter 21, changeover switch 2
2. It has a pixel converter 23, a P / S converter 24, and a digital display device 25 as a digital display.

The A / D converter 20 converts an analog video signal input to the analog signal input terminal 10 into a digital video signal. The S / P converter 21 includes:
The digital video signal input to the digital signal input terminal 18 is converted from a serial signal to a parallel signal. The changeover switch 22 switches and outputs a video signal output from the A / D converter 20 and the S / P converter 21. The pixel converter 23 includes the changeover switch 22
Performs the enlargement / reduction processing on the video signal output from.
The P / S converter 24 converts a video signal output from the changeover switch 22 from a parallel signal to a serial signal. The digital display device 25 displays a corresponding image based on the image signal output from the pixel converter 23.

The N image display devices 26, 26,...
26, the switching side of the changeover switch 22 of the first video display device 26 is connected to the output side of the A / D converter 20, and the second to N-th video display devices 26,
, 26 are set to S / S.
, 21 are connected to the output side. Digital signal output terminal 1 of first video display device 26
9 is connected to the digital signal input terminal 18 of the second video display device 26, and the digital signal output terminal 19 of the second video display device 26 is connected to the third video display device 26 (not shown). The digital signal input terminal 18 (not shown) is connected to the digital signal input terminal 18 in the same manner.
The digital signal output terminal 19 (not shown) of the 1) th video display device 26 (not shown) is connected to the digital signal input terminal 18 of the Nth video display device 26.

Next, the operation of FIG. 1 will be described. For convenience of explanation, when N = 4, each pixel converter 23 performs an enlargement process for displaying a partially enlarged image on the corresponding digital display device 25, and the entire four digital display devices 25 to 25 form one screen. A case of displaying a multi-screen (enlarged video) will be described.

(1) When an analog video signal of the entire enlarged video is input to the analog signal input terminal 10 of the first video display device 26, this input video signal is input to the A / D converter 2
0 is converted to a digital video signal,
2 through a pixel converter 23 and a P / S converter 24. The pixel converter 23 performs a predetermined enlargement process on the input digital video signal, and displays a corresponding partially enlarged image (for example, a 画面 screen located on the upper right side of the multi-screen) by the digital display device 25. You. P
In the / S converter 24, the input digital video signal is converted from a parallel signal to a serial signal, and this signal is input to the digital signal input terminal 18 of the second video display device 26 via the digital signal output terminal 19. .

(2) In the second video display device 26,
The video signal input to the digital signal input terminal 18 is S /
The serial signal is converted into a parallel signal by the P converter 21, and the pixel converter 23 and the P /
Input to the S converter 24. The pixel converter 23 performs a predetermined enlargement process on the input digital video signal, and displays a corresponding partially enlarged image (for example, a 画面 screen located on the upper left side of the multi-screen) by the digital display device 25. You. In the P / S converter 24, the input digital video signal is converted from a parallel signal to a serial signal, and this signal is input to the digital signal input terminal 18 of the third video display device 26 via the digital signal output terminal 19. I do.

(3) The third and fourth elements operate in the same manner.
In the second video display devices 26, 26, the corresponding partially enlarged video (for example, a 1/4 screen located on the lower left and lower right sides of the multi-screen) is displayed by the digital display devices 25, 25. Therefore, a multi-screen (enlarged image) is displayed as a whole.

In the embodiment shown in FIG. 1, the case where N = 4 has been described. However, the present invention is not limited to this, and can be used even when N is other than 4.

In the embodiment shown in FIG. 1, the digital display of the N image display devices is a multi-screen (enlarged image).
Has been described in which a partially enlarged image obtained by dividing an image into N screens having the same area and displaying a single multi-screen as a whole has been described. However, the present invention is not limited to this. The present invention can also be used in a case where the image is displayed at an arbitrary area ratio by changing the / reduction ratio. For example, by setting the enlargement / reduction ratio of the pixel converter of each video display device to 1, each of the digital displays individually displays all the video of the analog video signal input to the first video display device. It can also be used for the case where it is done.

In the embodiment shown in FIG. 1, in order to facilitate connection between the N video display devices and to facilitate input of analog video signals to the first video display device, each video An analog signal input terminal for taking in an analog video signal input from the outside into the display device and outputting it to the A / D converter, and a digital video signal output from the video display device at the preceding stage to take in the internal S / A digital signal input terminal for outputting to a P converter, and an internal P
Although a case has been described where a digital video signal output from the / S converter is provided to a digital signal input terminal of a video display device at a subsequent stage and a digital signal output terminal is provided, the present invention is not limited to this. The present invention can also be applied to a case where any one, two, or all of the analog signal input terminal, digital signal input terminal, and digital signal output terminal are omitted.

In the embodiment shown in FIG. 1, a pixel converter is provided between the changeover switch in each video display device and the digital display device, and the pixel converter performs enlargement processing of the video signal output from the changeover switch. A case has been described in which the corresponding partially enlarged image is displayed on the digital display device and a multi-screen, which is one screen as a whole, is displayed. However, the present invention is not limited to this, and the pixel converter is omitted and switching is performed. The video signal output from the switch is directly supplied to the digital display device, and each of the N digital display devices individually displays the entire video of the analog video signal input to the first video display device. Also available for cases.

Next, the operation when the video display device 26 is used alone will be described with reference to FIG. (1) A predetermined enlargement /
When displaying a reduced image, the switching side of the changeover switch 22 is connected to the output side of the A / D converter 20. When an analog video signal is input to the analog signal input terminal 10, the input video signal is converted into a digital video signal by the A / D converter 20 and input to the pixel converter 23 via the changeover switch 22. The pixel converter 23 performs a predetermined enlargement / reduction process on the input digital video signal, and a corresponding enlarged / reduced image is displayed on the digital display device 25.

(2) When displaying a predetermined enlarged / reduced image based on a digital video signal input, the switching side of the changeover switch 22 is connected to the output side of the S / P converter 21. When a digital video signal is input to the digital signal input terminal 18, the input video signal is converted from a serial signal to a parallel signal by the S / P converter 21, and
The data is input to the pixel converter 23 via the changeover switch 22.
The pixel converter 23 performs a predetermined enlargement / reduction process on the input digital video signal, and a corresponding enlarged / reduced image is displayed on the digital display device 25.

In the embodiment shown in FIG. 1, a case has been described in which all of the N video display devices have the same configuration. However, the present invention is not limited to this, and the N video display devices may have the same configuration. The first video display device has the same configuration as that of the embodiment of FIG. 1, and each of the second to N-th video display devices has the same structure as that of the embodiment of FIG.
The A / D converter 20 and the changeover switch 22 are omitted, and the switching side of the changeover switch 22 is connected to the A / D converter 20 for the first image display device, and the second to Nth images are displayed. As for the display device, the image display device 26 of the preceding stage is used.
The output side of the P / S converter 24 is connected to the video display device 26 at the subsequent stage.
Also, the present invention is also applicable to a configuration in which an analog video signal is input to the A / D converter 20 of the first video display device 26 to display a multi-screen by coupling to the input side of the S / P converter 21 of FIG. can do. In this case, the same operation and effects as those of the embodiment of FIG. 1 are obtained, and the circuit configuration is simplified by omitting the A / D converter and the changeover switch for the second to Nth video display devices. be able to. Further, a pixel converter is provided between the changeover switch in the first video display device and the digital display, and the S / P converter and the digital display in the second to Nth video display devices are provided. By providing a pixel converter between them, the video signal can be enlarged by each of the pixel converters, and a corresponding partially enlarged image can be displayed on the digital display.

In the embodiment shown in FIG. 1, all of the N video display devices have an A / D converter and a changeover switch in addition to the S / P converter, the P / S converter and the digital display device. Although the case has been described, the present invention is not limited to this, and can be used even when the A / D converter and the changeover switch in each video display device are omitted. That is, an S / P converter for converting a digital video signal from a serial signal to a parallel signal and a corresponding video based on the video signal output from the S / P converter are provided to each of the N video display devices. A digital display for displaying, and a P / S converter for converting a video signal output from the S / P converter from a parallel signal to a serial signal, wherein the serial signal is connected to the S / P converter of the first video display device. Of the second to Nth video display devices, the P / S of the preceding video display device is used.
The present invention can also be used in a case where the output side of the converter is connected to the input side of the S / P converter of the video display device at the subsequent stage to display a multi-screen. In this case, the same operation and effect as those of the embodiment of FIG. 1 can be obtained, and the circuit configuration can be simplified. That is, when the input video signal is an analog signal, A /
Although a D converter and a P / S converter are required individually for each,
Since the A / D converter and the changeover switch can be omitted in all of the video display devices, the circuit configuration can be simplified as a whole. Further, by providing a pixel converter between the S / P converter and the digital display in each video display device, the video signal is expanded by each of the pixel converters, and a corresponding partial expansion is performed by the digital display. Images can be displayed.

[0032]

According to the first aspect of the present invention, there is provided a multi-video display device, wherein each video display device has an A / D converter, an S / P converter,
A changeover switch, a digital display, and a P / S converter are provided. The changeover side of the changeover switch of the first image display device is connected to the A / D converter side, and the second to Nth image displays are performed. For the device, the switching side of the changeover switch is S /
Connect to the P converter side and P
The output side of the / S converter is connected to the input side of the S / P converter of the subsequent video display device, and the A / D of the first video display device is connected.
An analog video signal is input to the converter to display a multi-screen, and the conversion of the input analog video signal to a digital video signal is performed only by the A / D converter of the first video display device. The adjustment in the A / D converter can be performed in one place, and the adjustment can be simplified. Also, since the video signals sequentially transmitted from the first video display device to the Nth video display device are serial signals, the number of signal lines connecting the N video display devices can be reduced. it can. Furthermore, since a video distributor as in the conventional example is unnecessary, the number of required components can be reduced, and the length of wiring required to each video display device can be reduced.

According to a second aspect of the present invention, in the first aspect, an analog signal input terminal for receiving an analog video signal input from the outside into each video display device and outputting the analog video signal to an A / D converter, A digital signal input terminal for taking in a digital video signal output from the video display device of the first type and outputting the digital video signal to an internal S / P converter;
A digital signal output terminal for outputting a digital video signal output from the converter to a digital signal input terminal of a subsequent video display device is provided, so that connection between the N video display devices can be easily performed. It is possible to easily input an analog video signal to the first video display device.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a pixel converter is provided between the changeover switch in each video display device and the digital display, and the pixel converter outputs the signal from the changeover switch. Since the enlargement processing of the video signal is performed and the corresponding partially enlarged image is displayed on the digital display, the corresponding partially enlarged image is displayed by each of the N image display devices, and as a whole, 1 image is displayed.
A multi-screen (enlarged image) serving as a screen can be displayed.

According to a fourth aspect of the present invention, an A / D converter and an S / P converter are provided in the first video display device among the N video display devices.
A converter, a changeover switch, a digital display, and a P / S converter are provided, and an S / P converter, a digital display, and a P / S converter are provided for each of the second to Nth video display devices.
An S converter is provided. For the first video display device, the switching side of the changeover switch is connected to the A / D converter side, and for the second to Nth video display devices, the preceding video display device is displayed. The output side of the P / S converter of the device is coupled to the input side of the S / P converter of the subsequent video display device, and an analog video signal is input to the A / D converter of the first video display device. Since the multi-screen is configured to be displayed, the same effect as that of the first aspect of the invention can be obtained, and A / D conversion can be performed in the second to N-th video display apparatuses as compared with the first aspect of the invention. The circuit configuration can be simplified by omitting the switch and the changeover switch.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a pixel converter is provided between the changeover switch in the first video display device and the digital display, and the second to N-th pixels are provided.
A pixel converter is provided between the S / P converter and the digital display in the video display devices up to the first order, and the enlargement processing of the video signal is performed by each of these pixel converters. Since the image is configured to be displayed, a corresponding partially enlarged image is displayed by each of the N image display devices, and a multi-screen (enlarged image) that is one screen as a whole can be displayed.

According to a sixth aspect of the present invention, an S / P converter, a digital display, and a P / S
A serial digital video signal is input to the S / P converter of the first video display device, and the second to Nth video display devices are provided with P / P converters of the preceding video display device. Since the output side of the / S converter is connected to the input side of the S / P converter of the video display device at the subsequent stage to display a multi-screen, the same effect as that of the first aspect of the invention is obtained. The circuit configuration can be simplified as compared with the first aspect of the invention. That is, one A / D converter and one P / S converter are required in addition to the N video display devices, but the A / D converter and the changeover switch are used for all of the N video display devices. Since it can be omitted, the circuit configuration can be simplified as a whole.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, a pixel converter is provided between the S / P converter and the digital display in each of the video display devices, and the S / P converter is provided by the pixel converter.
Since the video signal output from the / P converter is enlarged and the corresponding partially enlarged video is displayed on the digital display, the corresponding partially enlarged video is displayed by each of the N video display devices. It is possible to display a multi-screen (enlarged video) that is one screen as a whole.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a multi-image display device according to the present invention.

FIG. 2 is a block diagram showing one embodiment of a case where the video display device 26, which is a component of FIG. 1, is used alone.

FIG. 3 is a block diagram showing a conventional example.

FIG. 4 is a block diagram showing a display device 13a in FIG.

FIG. 5 is a block diagram of a configuration example conceivable for solving a problem occurring in the analog video distributor of FIG. 3;

[Explanation of symbols]

10: analog signal input terminal, 11, 15a, 20 ...
A / D (analog / digital) converter, 12: video distributor, 13a, 13b, 13c, 13d: display device, 14: analog video distributor, 14a, 1
4b, 14c, 14n: amplifier, 16a, 23: pixel converter, 17a, 25: digital display device (an example of digital display), 18: digital signal input terminal, 19: digital signal output terminal, 21: S / P
(Serial / parallel) converter, 22 ... changeover switch,
24 ... P / S (parallel / serial) converter, 26
... Video display device.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Shimura 1116 Suenaga, Takatsu-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu General Co., Ltd. Terms (reference) 5C023 AA02 AA14 AA21 AA23 AA38 BA12 BA15 CA02 CA03 CA08 DA06 EA02 5C082 AA02 AA34 BA20 BB03 BC07 BD01 BD02 BD07 CA33 CA36 CA62 CA81 CA85 CB01 MM02 MM04

Claims (7)

[Claims] 1. A multi-image display device for displaying a multi-screen by N (N is an integer of 2 or more) image display devices,
An A / D converter for converting an analog video signal into a digital video signal, an S / P converter for converting a digital video signal from a serial signal to a parallel signal, for each of the N video display devices; The A / D converter and S
A switch for switching and outputting a video signal output from the / P converter, a digital display for displaying a corresponding video based on the video signal output from the switch, and a video signal output from the switch in parallel. A P / S converter for converting a signal into a serial signal is provided, and a switching side of a changeover switch is connected to an A / D converter side for a first video display device among the N video display devices. For the second to Nth video display devices, the switching side of the changeover switch is connected to the S / P converter side, and the output side of the P / S converter of the preceding video display device is connected to the subsequent video display device. A multi-image display which is coupled to an input side of an S / P converter of a display device and inputs an analog video signal to an A / D converter of a first video display device to display a multi-screen. Display device. 2. A multi-image display device for displaying a multi-screen with N (N is an integer of 2 or more) image display devices,
Each of the N video display devices is provided with an analog signal input terminal, a digital signal input terminal, and a digital signal output terminal, and converts an analog video signal input to the analog signal input terminal into a digital video signal. A / D converter, an S / P converter for converting a digital video signal input to the digital signal input terminal from a serial signal to a parallel signal, and a video output from the A / D converter and the S / P converter A switch for switching and outputting a signal, a digital display for displaying a corresponding image based on a video signal output from the switch, and a P for converting the video signal output from the switch from a parallel signal to a serial signal. / S converter, and a first video display device among the N video display devices is provided. Connects the switching side of the changeover switch to the A / D converter side, and connects the changeover side of the changeover switch to the S / P converter side for the second to Nth video display devices, and Connect the digital signal output terminal of the video display device to the digital signal input terminal of the subsequent video display device, and input an analog video signal to the analog signal input terminal of the first video display device to display a multi-screen. A multi-image display device characterized by the above-mentioned. 3. A pixel converter is provided between a changeover switch and a digital display in each image display device, and the pixel converter performs an enlarging process of a video signal output from the changeover switch. 3. The multi-image display device according to claim 1, wherein a corresponding partially enlarged image is displayed. 4. A multi-image display device for displaying a multi-screen with N (N is an integer of 2 or more) image display devices,
An A / D converter for converting an analog video signal into a digital video signal and a digital video signal from a serial signal to a parallel signal are provided to a first video display device among the N video display devices. S / P converter, a switch for switching and outputting a video signal output from the A / D converter and the S / P converter, and displaying a corresponding image based on the video signal output from the switch. A digital display for converting the video signal output from the changeover switch from a parallel signal to a serial signal.
And an S / P converter for converting a digital video signal from a serial signal to a parallel signal in each of the second to Nth video display devices of the N video display devices. A digital display for displaying a corresponding image based on the video signal output from the S / P converter; and a P for converting the video signal output from the S / P converter from a parallel signal to a serial signal. / S
A converter is provided, the switching side of the changeover switch is connected to the A / D converter side for the first video display device, and the second to N-th video display devices are connected to the former stage. The output side of the P / S converter of the video display device is coupled to the input side of the S / P converter of the subsequent video display device,
A multi-image display device characterized by inputting an analog image signal to an A / D converter of the image display device and displaying a multi-screen. 5. A pixel converter is provided between a changeover switch in a first video display device and a digital display, and a S / P converter in a second to Nth video display devices and a digital converter are provided. 5. The multi-video display device according to claim 4, wherein a pixel converter is provided between the display units, and the image conversion processing is performed by each of the pixel converters, and a corresponding partially enlarged image is displayed on the digital display unit. . 6. A multi-image display device for displaying a multi-screen with N (N is an integer of 2 or more) image display devices,
Each of the N video display devices has an S / D for converting a digital video signal from a serial signal to a parallel signal.
A P converter, a digital display for displaying a corresponding video based on the video signal output from the S / P converter,
A P / S converter for converting a video signal output from the S / P converter from a parallel signal to a serial signal; and inputting a serial digital video signal to the S / P converter of the first video display device. For the second to Nth video display devices, the P / S of the preceding video display device is used.
A multi-image display device wherein an output side of the converter is connected to an input side of an S / P converter of a subsequent-stage image display device to display a multi-screen. 7. A pixel converter is provided between an S / P converter and a digital display in each video display device, and a video signal output from the S / P converter is expanded by the pixel converter. 7. The multi-image display device according to claim 6, wherein a corresponding partially enlarged image is displayed on said digital display.