JP2003235033A - Image display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display system capable of displaying an image without deteriorating the image quality at a low cost. <P>SOLUTION: The image display system (1) of this invention includes: a plurality of image input means (2, 4) for imaging a moving picture or a still picture; and an image output means (6) for outputting an image picked up by the image input means, and is characterized in that the image input means and the image output means are connected by a digital line (8). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display system for displaying an image picked up by image input means such as a surveillance camera and a document camera.

[0002]

2. Description of the Related Art At present, an image display system is constructed in which an image output by a plurality of image input means such as a surveillance camera or a document camera is displayed by an image output means such as a single projector. 10 and 11 show a typical example of such an image display system. The image display system shown in FIG. 10 includes a surveillance camera 102 and a document camera 1.
04, the video server 106, and the projector 108.
And. Surveillance camera 102 and document camera 104
The image information captured in (1) is sent to the video server 106 as an analog video signal of NTSC system, PAL system, or the like. The video server 106 switches the video signals input from the surveillance camera 102 and the document camera 104,
Alternatively, it is converted into a multi-screen and is output to the projector 108 as an analog video signal or analog RGB signal of NTSC system, PAL system, or the like.

Further, the image display system shown in FIG.
The video server 106 and the projector 108 are connected via a personal computer 110. In this configuration, the analog video signal input to the video server 106 is A / D converted, and the personal computer 110 is connected via a LAN cable such as 100BASE-TX.
Sent to. The signal sent to the personal computer 110 is output to the projector 108 as a high-resolution analog monitor output.

[0004]

In the above-described current image display system, when an image is input to the projector, an analog monitor output signal from a personal computer or an analog video output signal from a digital video camera or a video server is used. Often. In this method, since the input signal is analog, for example, when the signal is input to a liquid crystal or DLP method projector, the projector includes a scan converter including an 8-bit A / D converter that converts an analog signal into a digital signal. Must be built-in. However, there is a problem that image information that cannot be improved is deteriorated during analog transmission, and this problem becomes remarkable particularly when a video signal is transmitted to a projector through a long-distance video cable.

On the other hand, the resolution of the video signal is V at the maximum.
It is equivalent to GA, and it cannot be said that there is a sufficient amount of information as an image to be input to the current projector. For this reason,
In the image display system shown in FIG. 11, a video signal is once input to a personal computer, and recently, QXG
This point is covered as an analog monitor output corresponding to A level resolution. However, in this method, since it is necessary to perform A / D conversion in the video server, then D / A conversion in the personal computer, and further A / D conversion in the projector, deterioration of images is avoided. Not only that, but there is a problem that the cost of the entire image display system becomes high.

Furthermore, inputting an analog video signal to the projector causes the following problems. That is, (a) image quality is deteriorated or disturbed due to unmatched signal level and frequency, (b) noise is apt to occur when a long signal cable is used, and (c) the projector can be controlled from the personal computer side. No, (d) it is difficult to control the surveillance camera etc. from the personal computer side and output the captured image to the projector, (e) it is not possible to connect a plurality of surveillance cameras etc. in series, (f) multiple cameras in series It is difficult to output the captured image to the projector while controlling the monitoring camera or the like connected to the personal computer from the personal computer side, (g) It is difficult to output the captured image to the projector while directly controlling the monitoring camera or the like from the projector, (H) Directly connect multiple surveillance cameras connected in series from the projector. Controlled is difficult to output the captured image to the projector while, it is difficult to transmit the signal for (i) a copy guard.

Therefore, an object of the present invention is to provide an image display system which is inexpensive and can display an image without degrading the image quality.

[0008]

In order to solve the above-mentioned problems, the image display system of the present invention provides a plurality of image input means for picking up a moving image or a still image and an image picked up by the image input means. Image output means for outputting is provided, and the image input means and the image output means are connected by a digital line.

In the present invention thus constructed,
Image data of a moving image or a still image captured by the image input means is transmitted to the image output means as digital image data by a digital line. With this configuration, when an image is transmitted from the image input unit to the image output unit, it is less susceptible to ambient noise.

The image display system of the present invention further comprises image processing means, and the image input means is connected to the image output means via the image processing means by a digital line.

Further, it is preferable that the plurality of image input means are connected to each other in series by a digital line.
With this configuration, it is possible to shorten the total extension of the cable for connecting each image input unit and the image display unit.

Further, preferably, the image output means controls the image input means via a digital line. Alternatively,
The image processing means may control the image input means and / or the image output means via a digital line.

Further, it is preferable that the image output means or the image processing means has a video recording function. Further, preferably, the image output means or the image processing means has a multi-screen function.

Further, preferably, image input means, or
The image processing means has an encoder function to compress the image information, and the image output means has a decoder function to restore the compressed image information. With this configuration, it is possible to perform large-screen multi-screen playback with few dropped frames.

The digital line is IEEE1394.
It is good to use a single-core POF line. With this configuration, compared to a copper wire cable, it is less susceptible to noise, and compared to the case of connecting with a two-core POF cable,
The cable and its connecting terminal can be made compact and lightweight.

Further, a surveillance camera or a document camera can be used as the image input means. Further, preferably, the image output means is a front projection type projector or a rear projection type projector. Further, the image processing means may be a personal computer.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. First, an image display system according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 shows the overall configuration of an image display system according to the first embodiment of the present invention. As shown in FIG. 1, an image display system 1 according to the first embodiment includes a surveillance camera 2 and a document camera 4 which are image input means, a projector 6 which is an image output means, an image input means and an image output means. And a cable 8 for connecting.

As the image input means, in addition to the surveillance camera 2 and the document camera 4, any device such as a general digital video camera capable of picking up a still image and / or a moving image can be used. Further, as the image output means, any projector such as a liquid crystal type projector including a transmissive LCD, a reflective LCD or the like, a DLP type projector including a DMD or the like can be used, and these projectors are used. The image display device can be used in a single-sheet configuration or a three-sheet configuration.

The cable 8 for connecting the image input means and the image output means can be selected arbitrarily according to the digital information transmission system. Preferably, the transmission system is IEEE 1394, and the connection cable is a single-core POF (Pl
astic Optical Fiber) is recommended.

Next, an example of the internal configuration of the surveillance camera 2 will be described with reference to FIG. FIG. 2 is a block diagram showing a signal processing procedure inside the surveillance camera 2. As shown in FIG. 2, the surveillance camera 2 holds an image pickup lens 12 for taking an image, a CMOS unit 14 for converting light incident on the image pickup lens 12 into an electric signal, and a voltage generated in the CMOS unit 14. And a sample / hold circuit 16 for converting the voltage held by the sample / hold circuit 16 into a digital amount.
And a converter 18. The surveillance camera 2 further includes a high-speed DSP 20 for performing various processes on the digital data obtained by the A / D converter 18, an MPEG encoder 22 for compressing the digital data processed by the high-speed DSP 20, and a digital encoder. A frame memory 24 for temporarily storing data. Further, the surveillance camera 2 sends digital data to the IEEE.
An IEEE 1394 chip set 26 for transmitting in the 1394 system, a timing controller 28 for controlling the operation timing of each chip, a CPU 30 for sending a signal to each chip, and a focus adjustment and a zoom adjustment of the imaging lens 12. A driver unit 32, a focus adjustment motor 34 for performing focus adjustment of the image pickup lens 12, and a zoom adjustment motor 36 for performing zoom adjustment of the image pickup lens 12 are included.

The image pickup lens 12 is constructed so that focus adjustment and zoom adjustment can be performed by a focus adjustment motor 34 and a zoom adjustment motor 36. C
As the MOS unit 14, a unit having various numbers of pixels can be used depending on the application, and a CCD unit can be used instead of the CMOS unit 14. As the A / D converter 18, it is possible to use one having an accuracy of 8 to 12 bits depending on the application. High speed D
The SP 20 is configured to perform color control, brightness control, image correction, and other special image processing by digital signal processing. Further, the high speed DSP 20 is configured to be able to change image correction and the like in response to a signal from the CPU 30. In addition, the MPEG encoder 22
Is configured so that it can be bypassed when information compression is not required. The timing controller 28 is configured to control the operation timing of the sample hold circuit 16, the A / D converter 18, the high speed DSP 20, the MPEG encoder 22, and the frame memory 24.

The IEEE 1394 chip set 26
The application I / F unit 26a and the CPU I / F unit 26b in the EEE1394 LINK chip, and the PHY.
And a chip portion 26c. I / for application
The F section 26a is configured to transfer the video signal from the frame memory 24. I for CPU
The / F unit 26b includes an Asynchronous transmission / reception FIFO (not shown), a reception FIFO (not shown), and a Configuration Res
Access gister (CFR) (not shown) to Asynchro
It is configured for nous communication. The PHY chip portion 26c is in charge of the electrical interface and has a LIN
The data from the K chip is converted into serial data, and IEEE13
Generates electrical signals of 94 standard, and also IEEE139
The four standard signals are converted back to serial data and passed as parallel data to the LINK chip section.

The document camera 4 also has the same configuration as I
The digital image data captured by the EEE1394 method can be transmitted to the projector 6.

Next, referring to FIG. 3, the projector 6
An example of the internal configuration of will be described. The projector 6 is I
EEE1394 chip set 42, image frame memory 44, MPEG decoder 46, DSP 48
A CPU 50 and a scan converter 52 for handling signals other than IEEE 1394. The projector 6 also includes a projection lens 54, a zoom adjustment motor 56, and a motor driver / controller 58. Further, the projector 6 includes a timing controller 60 and a frame memory 62.
r, 62g, 62b and D / A converters 64r, 64
g, 64b, LCD driver 66, and liquid crystal panel 6
8 and.

Similar to the surveillance camera 2, IEEE 1394
The chipset 42 includes an I / F unit 42a for application and an I / F unit for CPU in the IEEE1394 LINK chip.
The / F unit 42b and the PHY chip unit 42c are included.
The application I / F unit 42 a is configured to transfer a video signal to the image frame memory 44.
The CPU I / F unit 42b is configured to transfer a control signal sent from the outside via the IEEE 1394 to the CPU 50. The PHY chip section 42c is configured to receive a video data signal and a control signal from the surveillance camera 2 or the like.

The MPEG decoder 46 is configured to convert an input signal, if it is MPEG data, into an arbitrary digital signal. DSP48
Like the surveillance camera 2, is configured to perform color control, brightness control, image correction, and the like, and preferably has a trapezoidal distortion correction function, a multi-screen display function, and the like. The scan converter 52 includes an A / D converter section 52a,
It is preferable to be configured so as to be compatible with analog RGB input, Y / C input, composite input, and the like.

Motor driver / controller 58
Is configured to drive the zoom adjusting motor 56 and adjust the projection lens 54 in response to a signal from the CPU 50. The timing controller 60 includes an image frame memory 44, an MPEG decoder 46, D
SP48, CPU50, frame memory 62, D / A
It is configured to control the operation timing of the converter 64, the LCD driver 66, and the like.

The frame memory 62 is configured to temporarily store the signals corrected by the DSP 48 and divided into RGB digital signals. Each D / A converter 64 converts the digital signal sent from each frame memory 62 into an analog signal, and the LCD driver 66
Is configured to be sent to. LCD driver 66
Is a liquid crystal panel 68 based on the input analog signal.
Is configured to drive. The liquid crystal panel 68 is
A transmissive type or a reflective type may be used, or a DMD driver and a DMD may be used instead of the LCD driver 66 and the liquid crystal panel 68. Also, LCD panel, D
The MD or the like may have a one-piece structure or a three-piece structure.

Next, the operation of the image display system according to the first embodiment of the present invention will be described. First, the light incident on the imaging lens 12 of the surveillance camera 2 is focused on the CMOS unit 14 by the imaging lens 12. The CMOS unit 14 converts incident light into an electric signal. The output voltage of the CMOS unit 14 is input to the sample hold circuit 16, and the voltage is sampled and held.
The voltage held by the sample hold circuit 16 is
It is input to the A / D converter 18 and converted into digital image data. This digital image data is a high-speed DSP
It is input to 20, and color control, brightness control, etc. are performed.
The digital image data processed by the high speed DSP 20 is input to the MPEG encoder 22 and compressed. If the data compression is not necessary, the MPEG encoder 22 may be bypassed and the high-speed DSP 20 may directly input the data to the frame memory 24, as shown by the broken line in FIG. Digital image data output from the MPEG encoder 22 is temporarily stored in the frame memory 24, and the IEEE 1394 chip set 26
Is transferred to the I / F unit 26a. The timing controller 28 controls the operation timing of these circuits.
The digital image data input to the IEEE1394 chip set 26 is sent to the projector 6 by the single-core POF cable 8 via the PHY chip section 26c.

On the other hand, from the projector 6 to the IEEE 13
The control signal sent via 94 and the single-core POF cable 8 is sent to the CPU 30 via the PHY chip section 26c and the CPU I / F section 26b. The CPU 30 outputs a signal to the driver unit 32 according to the input control signal, drives the focus adjustment motor 34 and the zoom adjustment motor 36 of the imaging lens 12, and controls the imaging lens 12. Alternatively, the CPU 30 sends a signal to the high-speed DSP 20 to change settings such as color control and brightness control.

By the same operation, the document camera 4
To the projector 6 via the single-core POF cable 8, and the projector 6 also sends a control signal to the document camera 4.

From the surveillance camera 2 or the document camera 4 to the single core P
The digital image data sent to the projector 6 via the OF cable 8 is the IEEE 13 of the projector 6.
It is received by the PHY chip portion 42c of the 94 chip set 42. This digital image data is stored in the I / F section 42.
It is sent to the image frame memory 44 via a and is temporarily stored. The data stored in the image frame memory 44 is restored by the MPEG decoder 46, and the DS
Input to P48. The digital image data input to the DSP 48 is divided into RGB digital signals,
It is temporarily stored in the frame memories 62r, 62g, 62b. RGB stored in each frame memory 62
The digital signals are D / A converters 64r and 64, respectively.
converted to RGB analog signal by g and 64b, and L
It is input to the CD driver 66. LCD driver 6
Reference numeral 6 drives the liquid crystal panel 68 according to the input RGB analog signals. The timing controller 60 controls the operation timing of these data processes. Light emitted from a light source (not shown) of the projector 6 and modulated by the liquid crystal panel 68 is projected by the projection lens 54.

On the other hand, when the analog image data is input to the projector 6 via the scan converter 52, the analog image data is converted into the scan converter 52.
Is converted into digital image data by the A / D converter unit 52a and is input to the DSP 48. This DSP
The digital image data input to 48 is IEEE13
It is processed in the same manner as the digital image data input to the DSP 48 by the 94 system and projected by the projection lens 54.

A control signal sent from the surveillance camera 2 or the document camera 4 to the projector 6 via the single-core POF cable 8 is sent to the CPU 50 via the CPU I / F section 42b of the IEEE1394 chip set 42. . The CPU 50 sends a signal to the motor driver / controller 58 in accordance with the input control signal to drive the zoom adjusting motor 56 to perform zoom adjustment of the projection lens 54.

FIG. 4 shows an example in which a plurality of images are simultaneously projected by the projector 6. When a plurality of images are simultaneously input to the projector 6 from the surveillance camera 2, the document camera 4, etc., these images can be converted into multiple screens and displayed on one screen.

In this embodiment, two image input means, that is, a surveillance camera and a document camera are used.
It is possible to connect any image input means of more than one unit.
In the above-described embodiment, the control signal is sent from the projector 6 to the surveillance camera 2 or the document camera 4, or vice versa. However, the switches provided in the projector 6, the surveillance camera 2, and the document camera 4 (see FIG. These devices can also be directly controlled by (not shown) or the like.
In addition to the focus adjustment and zoom adjustment described above, the control signal also sets the image capture speed, the image display speed, the image resolution, and the infrared filter on / off.
It is also possible to make settings such as OFF, color tone and gradation on the image input device side. Further, the projector 6 may have a video recording function, and the video may be stored in the projector 6.

In the image display system according to the first embodiment of the present invention, it is possible to reduce the signal deterioration and the image disturbance as compared with the case where the surveillance camera and the projector are connected by the analog method. . According to the present embodiment, the control signal from the projector can be easily transmitted to the surveillance camera or the document camera with one cable. Also, by connecting in a digital manner, it is possible to easily cope with copy guard and the like, and it is possible to easily realize a multi-screen. Furthermore, I
By adopting a single-core POF for the EEE1394 connection, wiring can be made smaller, lighter, and cheaper than when a two-core POF is adopted. In addition, magnetic and other noises can be generated as compared with the conventional copper wire connection. Can be less affected. Furthermore, the MPEG encoder 2 is used as the image input means.
2 is provided and the image output means is provided with the MPEG decoder 46, it is possible to perform large-screen multi-screen reproduction with few dropped frames.

Next, an image display system according to the second embodiment of the present invention will be described with reference to FIG. Second of the present invention
The embodiment differs from the first embodiment in that a surveillance camera and a document camera are connected in series. Therefore, here, only the points different from the first embodiment will be described, and description of similar configurations, operations, and effects will be omitted.

FIG. 5 shows an image display system according to the second embodiment of the present invention. The image display system 70 according to the second embodiment includes a document camera 4, a surveillance camera 2, a projector 6, a single-core POF cable 8a connecting the document camera 4 and the surveillance camera 2, a surveillance camera 2 and a projector 6. And a single-core POF cable 8b for connecting to each other. The configurations of the monitoring camera 2, the document camera 4, the projector 6, and the single-core POF cables 8a and 8b are the same as those in the first embodiment.

Next, the operation of the image display system 70 according to the second embodiment of the present invention will be described. The image captured by the document camera 4 is a single core P as digital image data.
It is transmitted to the surveillance camera 2 by the OF cable 8a.
The digital image data of the image captured by the surveillance camera 2 and the digital image data sent from the document camera 4 are transmitted to the projector 6 by the single-core POF cable 8b. Further, the control signal transmitted from the document camera 4 to the projector 6 or vice versa similarly similarly receives the single-core POF cables 8a, 8a via the monitoring camera 2.
b. Further, the control signal between the surveillance camera 2 and the projector 6 is the single-core POF cable 8b.
Transmitted by. In this way, the single core POF cable allows the image input means of different models to be connected in series.

Therefore, the single-core POF cable 8b transmits the digital image data and the control signal of the surveillance camera 2 and the document camera 4 to the projector 6. In the transmission of the digital data, the data from a plurality of devices are transferred to each other. It can be easily transmitted by a cable of a book. As a result, a plurality of image input means can be connected in series, and a large number of image input means can be connected with a cable having a short total extension.

Next, an image display system according to the third embodiment of the present invention will be described with reference to FIG. Third of the present invention
In the embodiment, the surveillance camera and the document camera are connected to the projector via a personal computer.
Different from the first embodiment. Therefore, here, only the points different from the first embodiment will be described, and description of similar configurations, operations, and effects will be omitted.

FIG. 6 shows an image display system according to the third embodiment of the present invention. The image display system 72 according to the third embodiment includes a document camera 4, a surveillance camera 2, a personal computer 74, a projector 6, a single-core POF cable 8c connecting the surveillance camera 2 and the personal computer 74, and a document camera. 4 and a personal computer 74 for connecting a single-core POF cable 8d,
A single-core POF cable 8e for connecting the personal computer 74, which is an image processing means, and the projector 6;
Have. The surveillance camera 2, the document camera 4, the projector 6, and the single-core POF cables 8c, 8d, and 8e have the following configurations.
It is similar to the first embodiment.

The personal computer 74 has at least two IEEE139 for connecting the image input means.
It has four connection terminals (not shown) and at least one IEEE 1394 connection terminal (not shown) for connecting the image output means. In addition, the personal computer 74
The control signal can be transmitted to the surveillance camera 2, the document camera 4, and the projector 6 by operating the keyboard or mouse (not shown). With this control signal, various control items exemplified in the first embodiment can be controlled. Depending on the application, the personal computer 74 as the image processing means may have a video recording function.

Next, an image display system according to the fourth embodiment of the present invention will be described with reference to FIG. Fourth of the present invention
The embodiment is different from the third embodiment in that a surveillance camera and a document camera are connected in series and are connected to a projector via a personal computer. Therefore, only the points different from the third embodiment will be described here,
Description of similar configurations, operations, and effects will be omitted.

FIG. 7 shows an image display system according to the fourth embodiment of the present invention. The image display system 76 according to the fourth embodiment includes a document camera 4, a surveillance camera 2, a personal computer 74, a projector 6, a single-core POF cable 8f connecting the document camera 4 and the surveillance camera 2, and a document camera. 4 for connecting the personal computer 74 and the personal computer 74, and a single-core PO for connecting the personal computer 74 and the projector 6
And an F cable 8h. The configurations of the monitoring camera 2, the document camera 4, the projector 6, and the single-core POF cables 8f to 8h are the same as those in the third embodiment.

The personal computer 74 has at least one IEEE 139 for connecting the image input means.
It has four connection terminals (not shown) and at least one IEEE 1394 connection terminal (not shown) for connecting the image output means. In addition, the personal computer 74
The control signal can be transmitted to the surveillance camera 2, the document camera 4, and the projector 6 by operating the keyboard or mouse (not shown).

Next, an image display system according to the fifth embodiment of the present invention will be described with reference to FIG. Fifth of the present invention
The embodiment is different from the second embodiment in that five surveillance cameras are connected in series and connected to a projector. Therefore, here, only the points different from the second embodiment will be described, and description of the same configurations, operations, and effects will be omitted.

FIG. 8 shows an image display system according to the fifth embodiment of the present invention. The image display system 78 according to the fifth embodiment includes five monitoring cameras 2 and a projector 6.
And a single-core POF cable 8 that connects the five surveillance cameras 2 in series. The configurations of the surveillance camera 2, the projector 6, and the single-core POF cable 8 are the same as those in the third embodiment.

As described above, by successively connecting the image inputting means in series, it is possible to display a large number of images of the image inputting means within the range permitted by the amount of data transmitted by IEEE1394. Also, by sending control signals to a large number of image input means, each image input means can be controlled independently.

Next, with reference to FIG. 9, an image display system according to a sixth embodiment of the present invention will be described. Sixth of the present invention
The fifth embodiment is different from the fifth embodiment in that five surveillance cameras are connected in series and are connected to a projector via a personal computer. Therefore, here, only the points different from the fifth embodiment will be described, and description of similar configurations, operations, and effects will be omitted.

FIG. 9 shows an image display system according to the sixth embodiment of the present invention. The image display system 80 according to the sixth embodiment includes five monitoring cameras 2, a personal computer 74, a projector 6, and a single-core POF cable 8 that connects the five monitoring cameras 2 and the personal computer 74 in series. Have. The configurations of the surveillance camera 2, the projector 6, and the single-core POF cable 8 are the same as those in the third embodiment, and the configuration of the personal computer 74 is the same as that in the fourth embodiment. Although the preferred embodiment of the present invention has been described above, various modifications can be made to the above-described embodiment. Particularly, audio data may be included in the digital image data transmitted from the image input means through the digital line.

[0053]

According to the present invention, it is possible to provide an image display system which is inexpensive and can display an image without degrading the image quality.

[Brief description of drawings]

FIG. 1 shows an overall configuration of an image display system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a surveillance camera used in the first embodiment of the present invention.

FIG. 3 is a block diagram showing an internal configuration of a projector used in the first embodiment of the invention.

FIG. 4 is a perspective view showing a state in which a multi-image is projected by the image display system according to the first embodiment of the present invention.

FIG. 5 shows an overall configuration of an image display system according to a second embodiment of the present invention.

FIG. 6 shows an overall configuration of an image display system according to a third embodiment of the present invention.

FIG. 7 shows an overall configuration of an image display system according to a fourth embodiment of the present invention.

FIG. 8 shows an overall configuration of an image display system according to a fifth embodiment of the present invention.

FIG. 9 shows an overall configuration of an image display system according to a sixth embodiment of the present invention.

FIG. 10 is a diagram showing an example of a configuration of a conventional image display system.

FIG. 11 is a diagram showing another example of the configuration of a conventional image display system.

[Explanation of symbols]

1 Image display system according to the first embodiment 2 surveillance cameras 4 Document camera 6 projector 8 IEEE 1394 single core POF cable 12 Imaging lens 14 CMOS unit 16 sample and hold circuit 18 A / D converter 20 high speed DSP 22 MPEG encoder 24 frame memory 26 IEEE 1394 chipset 28 Timing controller 30 CPU 32 Driver 34 Focus adjustment motor 36 Zoom adjustment motor 42 IEEE 1394 chipset 44 image frame memory 46 MPEG decoder 48 DSP 50 CPU 52 Scan converter 54 Projection lens 56 Zoom adjustment motor 58 Motor Driver / Controller 60 Timing controller 62 frame memory 64 D / A converter 66 LCD driver 68 LCD panel

Continued front page    F-term (reference) 5C023 AA14 AA21 AA26 AA37 AA38                       CA08 DA04                 5C054 AA02 DA08 FE18 FE22 GB02                       HA16 HA19

Claims (12)

[Claims] 1. A plurality of image input means for picking up a moving image or a still image, and an image output means for outputting an image picked up by the image input means, the image input means and the image output means. An image display system characterized by being connected via a digital line. 2. The image according to claim 1, further comprising image processing means, wherein the image input means is connected to the image output means via the image processing means by a digital line. Display system. 3. The image display system according to claim 1, wherein the plurality of image input means are connected to each other in series by a digital line. 4. The image display system according to claim 1, wherein the image output unit controls the image input unit via the digital line. 5. The image according to claim 2 or 3, wherein the image processing unit controls the image input unit and / or the image output unit via the digital line. Display system. 6. The image display system according to claim 1, wherein the image output unit or the image processing unit has a video recording function. 7. The image display system according to claim 1, wherein the image output unit or the image processing unit has a multi-screen function. 8. The image input means or the image processing means has an encoder function for compressing image information, and the image output means has a decoder function for restoring the compressed image information. The image display system according to any one of claims 1 to 7, further comprising: 9. The digital line is IEEE1394
The image display system according to any one of claims 1 to 8, wherein the image display system is a single-core POF line. 10. The image display system according to claim 1, wherein the image input unit is a surveillance camera or a document camera. 11. The image output means is a front projection type projector or a rear projection type projector.
The image display system according to claim 10. 12. The image processing unit is a personal computer, and the image processing unit is a personal computer.
1. The image display system according to any one of 1.