JP2000330502A - Liquid crystal multiple display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of changing over a high definition large-screen display to a still picture display or a moving picture display simultaneously without generating disturbance in a display picture in the case of changing over the high definition large-screen display spreading over plural liquid crystal displays to another display screen in a liquid crystal multiple display device in which there are picture data inputs of plural systems. SOLUTION: In the liquid crystal multiple display device, it is made possible to change over the high definition large-screen display of a still picture or a moving picture spreading over plural liquid crystal displays to another display screen simultaneously without generating disturbance in the display picture by constituting each interface board 101 for driving a liquid crystal panel made to correspond to each liquid crystal display panel with input data processing means 109, 110, data selecting means 115, 118, a frame memory writing means 119, a register for writing the memory 122, a frame memory read-out means 120, a register for reading the memory 123, frame memories 116, 117, a magnified data processing means 126, an output timing signal generating means 127, a control data processing means 111 and a microcomputer 124.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal multi-display system comprising a plurality of liquid crystal displays, and more particularly, to switching a high-definition large-screen display over a plurality of liquid crystal displays to another display screen. The present invention relates to a liquid crystal multi-display device that can simultaneously switch screen displays without disturbance.

[0002]

2. Description of the Related Art In a multi-display system comprising a plurality of displays, image data of a still image or a moving image is displayed on a large screen with high definition over a plurality of displays. Conventionally, a configuration as described in, for example, JP-A-10-187109 has been adopted. This conventional multi-display system will be described with reference to FIG.

In FIG. 2, 201 is a monitor unit, 202 is an image input unit, 203 is an A / D converter, 204 is a storage selection unit, 205 is an image memory 1, 206 is an image memory 2, 207 is a switching operation unit, 208 Is a D / A converter, 209 is a display unit, 210 is a control signal receiving unit, 211 is a decoding unit, 212 is a reception control signal memory,
213 is an ID setting unit, 214 is a monitor system memory, 215 is a monitor control unit, 216 is an image transmission unit, 217 is an image signal generation unit,
218 is an image transmission unit, 219 is a monitor ID registration unit, 220 is a program code generation unit, 221 is a frame number generation unit, 222 is a synchronization adjustment unit, 223 is a control signal transmission unit, 224 is a control signal synthesis unit, and 225 is a monitor. Control program memory, 226 is a control unit,
227 is a system memory, 228 is an image signal line, and 229 is a digital control line.

In the operation of the conventional example, an image signal generation unit 217 of an image transmission unit 216 edits video signals of a camera, a VTR, a PC, and the like in advance, and continuously converts all image data displayed on a plurality of monitor units into a still image. The image is transmitted from the image transmission unit 218 to the image signal line 228 as an analog image signal of the image. Further, for the control of the monitor unit 201, each data of the monitor ID registration unit 219, the program code generation unit 220, the image frame number generation unit 221 and the monitor control program memory 225 is transferred to the control signal synthesis unit
The synthesized digital control signal is synthesized by the synthesizing unit 24, and the synthesized digital control signal is sent to the monitor unit 201 in synchronization with the image data output from the image sending unit 218 in the synchronization adjustment unit 222. Image signal line 228
Image data output from the digital control signal line 22
It operates according to the control signal sent from 9. The image data is converted into digital image data by the A / D converter 203 and stored in the image memory 1205 or the image memory 2206 by the storage selection unit 204. The stored digital image data is read out by the switching operation unit 207 and displayed on the display unit 209 through the D / A converter 208.

As described above, a plurality of image memories (image memory 1205 or image memory 2206) for storing at least one frame or one field of image data, and one frame of the image data stored in the plurality of image memories. Alternatively, a storage selection unit 204 that selects and stores the image data stored in the plurality of image memories in a unit of one field, and a switching operation unit 207 that switches and reads the image data stored in the plurality of image memories or reads and outputs the combined operation output. The stored image data is read out and displayed on the display unit 209.

[0006]

In the conventional multi-display system, when switching the image data displayed on the display to another display image, little consideration is given to the display quality of the image data displayed on the display.

For example, in Japanese Patent Application Laid-Open No. Hei 10-187109, when the image data of a still image displayed on the display unit 209 in FIG. 2 is switched to another still image, the image data stored in the image memory 1205 is read and displayed. Is switched from reading to reading image data from the image memory 2206 storing another image data to be displayed next,
The following things need to be considered.

In a state where the image data of the still image stored in the image memory 1 205 is read and displayed, the image memory 2
The image data of another still image different from the image data stored in the image memory 1 205 is written and stored in the image memory 206, and after the completion of the writing of the image data to the image memory 2 206 is recognized, the display unit 209 is recognized. It is necessary to switch to reading of image data from the image memory 2206 storing another image data at a timing when the image data of the still image displayed in the image memory is not disturbed. Otherwise, the image data of the still image displayed on the display unit 209 is switched to another image data in the middle of the screen of the display unit 209, so that the still image is disturbed. Also, when displaying image data of a moving image on the display unit 209, for the same reason, the display image is disturbed because the image is switched to another image data in the middle of the screen of the display unit 209.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal multi-display apparatus having a plurality of systems of image data inputs, in which a high-resolution large-screen display over a plurality of liquid crystal displays is switched to another display screen. It is an object of the present invention to provide an apparatus that can simultaneously switch a still image display or a moving image display without disturbing a display image.

In order to achieve the above object, a liquid crystal multi-display device of the present invention comprises a plurality of liquid crystal panels, a plurality of liquid crystal panel driving interface boards, a plurality of input data processing means, a plurality of data selection means, a frame memory writing. Means, a memory writing register, a frame memory reading means, a memory reading register, a plurality of frame memories, an enlarged data processing means, an output timing signal generating means, a control data processing means, and a microcomputer. By sending an instruction to the microcomputer with the control data, the microcomputer makes settings in the memory write register and the memory read register, and sends signals to the frame memory writing unit and the frame memory reading unit, and The same image data can be displayed on a liquid crystal display, or one image data can be enlarged and displayed on a plurality of liquid crystal displays. According to the image data to be displayed on the liquid crystal display, two frame memories are provided for still images and four frame memories for moving images, and another image data is written to the frame memory while displaying image data. Every
By simply changing the reading destination from the frame memory, the screen display can be switched without disturbing the display image.

In other words, the present invention is as follows. A liquid crystal panel for displaying image data, a liquid crystal panel driving interface board for controlling image data to be displayed on the liquid crystal panel and having a plurality of systems for inputting image data, and a liquid crystal multi-display device comprising a plurality of liquid crystals Wherein said liquid crystal panel driving interface board comprises a plurality of input data processing means, a plurality of data selection means, a frame memory writing means, a memory writing register, a frame memory reading means, a memory reading register, and a plurality of image data inputs. A frame memory configuring means, an enlarged data processing means, an output timing signal generating means, a control data processing means, a microcomputer, a control signal for transmitting and receiving instructions to and from the microcomputer, and storing image data for each of a plurality of inputs in the frame memory. By writing independently, The liquid crystal multi-display device is characterized in that it is possible to switch the high-resolution large-screen still image display of the plurality of liquid crystal panels to all the liquid crystal panel display data of the liquid crystal multi-display device composed of a plurality of liquid crystal panels. is there.

Further, in this liquid crystal multi-display device, there is provided means for writing arbitrary image data from another input to the frame memory while displaying while inputting arbitrary image data from one input. A liquid crystal multi-display device characterized by the above.

Further, in these liquid crystal multi-display devices, there is provided a means for reading out image data from another input from the frame memory in accordance with a command to the microcomputer and switching display contents. is there.

Further, in these liquid crystal multi-display devices, the microcomputer is provided with a register setting data storage section for storing a value set in a memory read register.

Further, in these liquid crystal multi-display devices, a register is provided which can set writing to the frame memory and reading from the frame memory for each arbitrary input according to the display mode such as the resolution of the image data to be displayed. A liquid crystal multi-display device characterized by the above.

Further, in these liquid crystal multi-display devices, the image input interface is an analog interface.

Further, in these liquid crystal multi-display devices, the image input interface is a digital interface.

Further, the present invention is characterized by comprising one of the above-mentioned liquid crystal multi-display device and an external system device having a display screen control means, an image data storage unit, a plurality of image data transmitting means and control data transmitting / receiving means. This is a liquid crystal multi-display system.

Further, in these liquid crystal multi-display devices, it is possible to input a still image having at least two systems, and to perform a still image input having two frame memories and two or more systems when displaying any one input data. The liquid crystal multi-display device further comprises means for realizing switching of a corresponding display screen.

In addition, in these liquid crystal multi-display devices, when a moving image having at least two or more systems can be input and any one input data is displayed, the following is required.
There is also provided a liquid crystal multi-display device provided with means for realizing switching of a display screen corresponding to moving image input having one frame memory and two or more systems.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. 1, 3 and 4. FIG. A description will be given of a plurality of systems of image input as an example of two systems of image input.

FIG. 1 is a block diagram of a liquid crystal multi-display device according to the present invention. 101 is an interface board for driving a liquid crystal panel, and 102 is a liquid crystal panel. The liquid crystal multi-display device is composed of n liquid crystal panels,
.., -N indicate that a plurality (n) of the liquid crystal panel driving interface boards 101 and the liquid crystal panels 102 exist. 103 is one image data bus among the two systems of image input from the external system, 104 is one image data bus for transferring image data to the next-stage liquid crystal panel drive interface board 101, and 105 is the image data bus from the external system. Another image data bus among the two systems of image inputs, 106 is another image data bus for transferring image data to the next-stage liquid crystal panel drive interface board 101, and 107 is for exchanging control data with an external system. Control data bus 108, a control data bus connected to the next liquid crystal panel driving interface board 101 to exchange control data, input data processing means 109, 110, control data processing means 111, and liquid crystal panel driving 112, 113 Data bus for transferring image data inside the interface board 101 for the liquid crystal panel, and 114 is an interface for driving the liquid crystal panel. Control data bus for transferring control data to the internal board 101, 115 and the data selection means 1,116 117
Is a frame memory 1 and a frame memory 2 in a double buffer configuration in which image data of different still images are written and read, 118 is a data selection means 2, 119 is a frame memory writing means, 120 is a frame memory reading means, and 121 is a frame memory reading means. An image data read destination switching signal, 122 is a memory write register referred to by the frame memory writing means 119, 123 is a memory read register referred to by the frame memory reading means 120, and 124 is a liquid crystal panel driving interface board 101. Unique I
A microcomputer that manages D and performs register setting, etc., 125 is an input image data capture signal, 126 is an enlarged data processing unit, 127
Is an output timing signal generating means, and 128 is the liquid crystal panel 2
An image data bus for transferring data to be displayed on the control signal bus 129 for transferring an output timing signal (synchronization signal);
130 is an output timing signal, 131 is a display image data switching signal, 132 is a register rewrite signal, and 133 is an image data input destination switching signal. In this description, the liquid crystal panel
The liquid crystal drive interface board 101 is one-to-one with respect to 102. However, by mounting a control circuit for a plurality of liquid crystal panels 102 on the liquid crystal drive interface board 101, the input data processing means 109 and 110 can be configured. Common use is possible, and it is possible to reduce the amount of hardware.
FIGS. 3 and 4 show an example of a high-resolution large-screen display of image data on a four-panel liquid crystal multi-display composed of four liquid crystal displays.

Numerals 301 and 401 are liquid crystal displays constituted by using the liquid crystal panel driving interface board 101 and the liquid crystal panel 102 shown in FIG. In the following, in a liquid crystal multi-display device with two systems of image data input, when switching a high-resolution large-screen display of a still image across multiple liquid crystal displays to another display screen, the still image is displayed instantaneously without disturbing the displayed image The operation for switching to is described.

First, the operation of the liquid crystal panel driving interface board 101 shown in FIG. 1 will be described. Image data of a still image is transmitted from an external system through two image data buses 103 and 105, and a microcomputer 1 is transmitted through a control data bus 107.
Control data for controlling the operation of 24 is sent. For the control data sent to the liquid crystal panel drive interface board 101, the control data processing means 111 sends the sent control data to the next liquid crystal panel drive interface board 101 through the control data bus 108. The operation completion data returned from the microcomputer 124 is sent back to the external system via the control data bus 107. The microcomputer 124 operates based on the control data only when the transmitted control data is the control of the ID of the liquid crystal panel driving interface board 101 managed by itself, and when the operation is completed, the fact is described. Is sent to the control data processing means 111. If the control data is control data for setting image data to be displayed on the liquid crystal panel 102, a value is set in the memory write register 122 and the memory read register 123 according to the resolution of the image data to be displayed. The frame memory writing means 119 is controlled by the input image data input signal 125. Alternatively, when the control data is control data for switching the reading destination of the image data in the frame memory 1116 or the frame memory 2117, the display image data switching signal 131
Controls the frame memory reading means 120. The memory read register 123 stores the frame memory 1 116 or the frame memory 2 currently displayed on the liquid crystal panel 102.
The setting part of the image data being read out from the memory 117 and the frame memory 1 116 to be displayed on the liquid crystal panel 102 from now on
Alternatively, the microcomputer 124 independently has a setting portion of the image data newly written in the frame memory 2117, and the microcomputer 124 sets a value in the memory reading register 123 in a setting portion of the image data to be displayed on the liquid crystal panel 102 from now on. , Output size, enlargement ratio, and display position.

By setting the memory writing register 122 and the memory reading register 123 over a plurality (including all) of the liquid crystal panel driving interface boards 101, the same image data can be displayed on a plurality of liquid crystal panels, or a plurality of liquid crystal panels can be displayed. One image data can be enlarged and displayed over the liquid crystal panel, and various displays can be performed on the liquid crystal panel 102. On the other hand, the interface board for driving the LCD panel
With respect to the still image data sent to 101, input data processing means 109 and 110 convert the sent image data into digital data if the image data is analog data, and convert the image data into digital data. If it is, the image data bus 104 or the image data bus 1
The data is sent to the liquid crystal panel driving interface board 101 of the next stage through 06, and is sent to the frame memory writing means 119 through the data selection means 1115. Upon receiving the input image data capture signal 125 from the microcomputer 124, the frame memory writing unit 119
If the image data to be displayed in 02 is different from the image data currently being displayed, the data selection means 1 115 is switched by the input destination switching signal 133 of the image data, and the memory writing register 122 is referred to. Then, an operation of writing one frame of image data into the frame memory 1116 or the frame memory 2117 through the data selection means 2118 is performed.

The write operation with reference to the memory write register 122 ends when the writing of one frame of image data is completed. The image data of the still image written in the frame memory 1116 or the frame memory 2117 is read by the frame memory reading means 120. The frame memory reading means 120 is provided by the microcomputer 1
Upon receiving the display image data switching signal 131 from the memory 24, after completing the reading of one frame of image data from the frame memory 1116 or the frame memory 2117 and the transfer of the image data to the enlarged data processing means 126, the memory The register rewrite signal 132 is applied to the read register 123.
To rewrite the settings of the image data currently being read from the frame memory 1116 or the frame memory 2117 currently displayed on the liquid crystal panel 102 with the settings of the image data to be displayed on the liquid crystal panel 102. The data selection means 2 118 is switched by the read destination switching signal 121 and waits for reception of the next output timing signal 130 generated by the output timing signal generation means 127. Upon receiving the output timing signal 130, the frame memory reading means 120 refers to the memory reading register 123,
The image data is read out through the data selection unit 2118, and the image data is sent to the enlarged data processing unit 126. The enlargement data processing unit 126 performs enlargement processing on the image data with reference to the memory readout register 123, and outputs the image data via the image data bus 128 in synchronization with the output timing signal generated by the output timing signal generation unit 127. . The output timing signal generating means 127 periodically generates the output timing signal 130 and sends it to the frame memory reading means 120, so that the still image data is displayed on the liquid crystal panel 102.

In the liquid crystal panel driving interface board 101 operating as described above, when the still image data is displayed on the liquid crystal panel 102, the setting of the image data to be displayed next is used as the control data as the image data. Is transmitted to all or some of the liquid crystal panel driving interface boards 101, and the setting of the image data to be switched and displayed is completed in advance, and the liquid crystal panel 102 at the time when scanning for one screen display is completed is completed. By transmitting control data for switching the display screen to all or some of the LCD panel drive interface boards 101 at the timing of switching the still image display, a high-resolution large-screen display of a still image over a plurality of liquid crystal displays is displayed. It is possible to switch instantly without disturbing the image. By using the liquid crystal panel drive interface board 101,
During the period when the image data shown in FIG. 3 is displayed, the settings for display control such as the enlargement ratio of the image data shown in FIG. 4 and the display position setting are performed as background processing, and the display image switching is performed. By executing the instruction to be performed, image data can be instantaneously displayed as shown in FIG. 4 without disturbing the display image.

Although the liquid crystal panel driving interface board 101 shown in FIG. 1 has been described for two systems of image input, the data selection means 1115 can be adapted to a plurality of systems of image input.
It is possible to provide an interface board for driving a liquid crystal panel that supports image input of a plurality of systems.

Another embodiment will be described with reference to FIGS. 3 and 4 are as described above. FIG. 5 is a block diagram of the liquid crystal multi-display device of the present invention. 501 is an interface board for driving a liquid crystal panel, 502 is a liquid crystal panel, and 503 is one of two systems of image input from an external system.
One image data bus, 504 is one image data bus for transferring image data to the next-stage liquid crystal panel driving interface board 501, and 505 is another image data bus among two systems of image input from an external system , 506 is another image data bus for transferring image data to the next-stage liquid crystal panel driving interface board 501, 507 is a control data bus for exchanging control data with an external system, 50
8 is the next-stage LCD panel drive interface board 501
A control data bus that connects to and exchanges control data
509 and 510 are input data processing means, 511 is control data processing means, 512 and 513 are image data buses for transferring image data inside the liquid crystal panel driving interface board 501, and 514 are control data inside the liquid crystal panel driving interface board 501. Control data bus to transfer, 515
Are data selection means 1, 516 and 517 are frame memories 1 and 2 of a double buffer configuration in which image data of different still images are written and read, respectively, 518 are data selection means 2, 519 are frame memory writing means, 520
Is a frame memory reading means, 521 is a read destination switching signal for image data, 522 is a memory writing register referred to by the frame memory writing means 519, 523
Is a memory read register referred to by the frame memory read means 520, 524 is a microcomputer that manages an ID unique to the liquid crystal panel drive interface board 501 and performs register setting, etc., 525 is an input image data input signal, and 526 is enlarged data. Processing means, 527 is an output timing signal generating means, 528 is an image data bus for transferring data to be displayed on the liquid crystal panel 502, and 529 is an output timing signal
A control signal bus for transferring (synchronization signal), 530 is an output timing signal, 531 is a display image data switching signal, 532 is a register setting data storage unit, and 533 is an image data input destination switching signal. Hereinafter, in a liquid crystal multi-display device having two systems of image data input, when switching a high-resolution large-screen display of a still image over a plurality of liquid crystal displays to another display screen, the still image is simultaneously displayed without disturbing the displayed image. The switching operation will be described.

In the liquid crystal panel driving interface board 501 of FIG. 5, the microcomputer 524 and the frame memory reading means 520 of FIG. 5 operate differently from the liquid crystal panel driving interface board 101 of FIG. Other means and the like operate in the same manner as in FIG. The microcomputer 52 in FIG.
4 operates based on the control data only when the control data sent from the control data processing means 511 is control for the ID of the liquid crystal panel driving interface board 501 managed by itself, and operates based on the control data. Is completed, data for notifying the completion is sent to the control data processing means 511. When the control data is control data for setting image data to be displayed on the liquid crystal panel 502, the memory writing register 522 is set in accordance with the resolution of the image data to be displayed.
, And the value to be set in the memory read register 523 is stored in the register setting data storage unit 532,
Further, the frame memory writing means 519 is controlled by the input image data input signal 525.

Alternatively, the control data is stored in the frame memory 1
If it is control data for switching the reading destination of the image data of the frame data 516 or the frame memory 2517, the data stored in the register setting data storage unit 532 is set in the memory reading register 523, and the display image data switching signal is output. 531 controls the frame memory reading means 520. What the microcomputer 524 stores in the register setting data storage unit 532 is a value to be set in the memory readout register 523 for the image data to be displayed on the liquid crystal panel 502, the output size, the enlargement ratio, and the display position. On the other hand, when receiving the display image data switching signal 531 from the microcomputer 524, the frame memory reading means 520 reads one frame of image data from the frame memory 1516 or 2517 and sends the image data to the enlarged data processing means 526. Is completed, the data selection unit 2518 is switched by the image data read destination switching signal 521, and the system waits until the next output timing signal 530 generated by the output timing signal generation unit 527 is received. Upon receiving the output timing signal 530, the frame memory reading means 520 refers to the memory reading register 523, performs an image data reading operation through the data selecting means 2518, and sends the image data to the enlarged data processing means 526.

In the liquid crystal panel driving interface board 501 operating as described above, while the image data of the still image is displayed on the liquid crystal panel 502, the setting of the image data to be displayed next is used as the control data as the image data. All or some of the liquid crystal panels are sent to the liquid crystal panel driving interface board 501 and the setting of the image data to be displayed is completed in advance, and all or some of the liquid crystal panels are switched at the timing of switching the still image display of the liquid crystal panel 502. By sending the control data for switching the display screen to the driving interface board 501, it is possible to simultaneously switch a high-resolution large-screen display of a still image over a plurality of liquid crystal displays without disturbing the display image. By using the liquid crystal panel drive interface board 501, while displaying image data as shown in FIG. 3, setting to display as shown in FIG. 4 is performed, and by switching the display image, display data for one screen is displayed. Since the screen data does not change during the scan, the image data can be displayed simultaneously as shown in FIG. 4 without disturbing the display image.

Another embodiment will be described with reference to FIGS. 3, 4, and 6. FIG. 3 and 4 are as described above. FIG. 6 is a block diagram of the liquid crystal multi-display device of the present invention. 60
1 is an interface panel for driving a liquid crystal panel, 602 is a liquid crystal panel, 603 is one image data bus among two types of image input from an external system, and 604 is an image data bus for an interface board 601 for driving a liquid crystal panel at the next stage. One image data bus to transfer, 605 is another image data bus in the two systems of image input from the external system, and 606 is another image data bus to transfer image data to the next-stage liquid crystal panel drive interface board 601. An image data bus, 607 is a control data bus for exchanging control data with an external system, 608 is a control data bus connected to the next-stage liquid crystal panel driving interface board 601 for exchanging control data, and 609 and 610 are input data processing means. , 611 are control data processing means, and 612, 613, 614, 615 are image data inside the liquid crystal panel driving interface board 601. Image data bus for transferring, 616 control data bus for transferring control data to the internal the liquid crystal panel driver interface boards 601, 617 and 618 and the data selection means 1,619,620 6
21 and 622 are frame memories 1 and 2 in which image data of different moving images are written and read, respectively, frame memories 2 and 3 and frame memories 4 and 623 are data selection means 2 and 6
24,625 is a frame memory writing means, 626 is a frame memory reading means, 627 is an image data reading destination switching signal, and 628 is the frame memory writing means 62
4,625 is a memory write register to be referred to, 629 is a memory read register to be referred to by the frame memory read means 626, 630 is a microcomputer that manages an ID unique to the liquid crystal panel drive interface board 601 and performs register setting, etc., 631,632 is Input image data capture signal, 6
33 is an enlarged data processing means, 634 is an output timing signal generating means, 635 is an image data bus for transferring data to be displayed on the liquid crystal panel 602, 636 is a control signal bus for transferring an output timing signal (synchronous signal), and 637 is An output timing signal, 638 is a display image data switching signal, 639 is a register rewrite signal, 640 and 641 are image data input destination switching signals, 642 and 643 are data selection means 3, 644 and 645 are frame memory write / read destination switching signals. In the following, in a liquid crystal multi-display device with two systems of image data input, when switching a high-resolution large-screen display of a moving image over multiple liquid crystal displays to another display screen, the operation of simultaneously switching to the moving image display without disturbing the displayed image. Will be described.

First, the operation of the liquid crystal panel driving interface board 601 shown in FIG. 6 will be described. Moving image data from an external system through two image data buses 603 and 605, and a microcomputer 630 through a control data bus 607.
The control data for controlling the operation of is transmitted. Regarding the control data sent to the liquid crystal panel driving interface board 601, the control data processing means 611 sends the sent control data to the next-stage liquid crystal panel driving interface board 601 via the control data bus 608. The operation completion data returned from the microcomputer 630 is returned to the external system through the control data bus 607. The microcomputer 630 operates based on the control data only when the transmitted control data is the control of the ID of the liquid crystal panel driving interface board 601 managed by itself, and when the operation is completed, the fact is described. Control data processing means
Send to 611. When the control data is control data for setting image data to be displayed on the liquid crystal panel 602, a value is set in the memory write register 628 and the memory read register 629 according to the resolution of the displayed image data. The frame memory writing unit 624 or the frame memory writing unit 625 is controlled by the input image data input signal 631 or the input image data input signal 632. Alternatively, the control data is stored in the frame memory 1619,
If the control data is for switching the image data reading destination of the frame memory 2620 or the frame memory 3621 or the frame memory 4622, the frame memory reading means 626 is controlled by the display image data switching signal 638.

The memory write register 628 includes a frame memory 1619, a frame memory 2620 or a frame memory 3621 currently displayed on the liquid crystal panel 602, and a setting portion of image data being written to the frame memory 4622. Frame memory 1 to display on panel 602
619, frame memory 2 620 or frame memory 3 621,
The image data setting portion newly written to the frame memory 4 622 is independently provided, and the microcomputer 630 sets the value in the memory writing register 628 in the image data setting portion to be displayed on the liquid crystal panel 602 from now on. This is the position setting. Similarly, the memory read register 629 is also the frame memory 1619, the frame memory 2620 or the frame memory 36 currently displayed on the liquid crystal panel 602.
21, The setting part of the image data being read from the frame memory 4 622 and newly written to the frame memory 1619, the frame memory 2620 or the frame memory 3 621 and the frame memory 4 622 for display on the liquid crystal panel 602 from now on. The image data setting part is independent and the microcomputer 63
The reason that 0 sets the value in the memory read register 629 is
From now on, the setting part of the image data to be displayed on the liquid crystal panel 602 is the setting of the output size, enlargement ratio and display position. By setting the memory write register 628 and the memory read register 629 over all the liquid crystal panel drive interface boards 601, the same image data can be displayed on multiple liquid crystal panels or one image data can be displayed on multiple liquid crystal panels. Enlarged display or LCD panel 6
Various displays are possible on 02. On the other hand, for image data of a moving image sent to the liquid crystal panel driving interface board 601, input data processing means 609 and 610
The transmitted image data is converted into digital data if the image data is analog data, and is directly converted into image data if the image data is digital data.
Alternatively, the image data is sent to the liquid crystal panel driving interface board 601 at the next stage through the image data bus 606, and is sent to the frame memory writing unit 624 or the frame memory writing unit 625 through the data selection unit 1617 or the data selection unit 1618. It can be easily realized by providing the input processing means 609 and 610 with an analog / digital conversion function.

When the frame memory writing means 624 and the frame memory writing means 625 receive the input image data capture signal 631 or the input image data capture signal 632 from the microcomputer 630, if necessary, the image data input destination switching signal 640 or The data selection unit 1617 or the data selection unit 1618 is switched by the image data input destination switching signal 641 and the memory write register 628 is switched.
Refer to the data selection means 3 642 or the data selection means 3
Frame memory 1 619, frame memory 2 62 through 643
0 or 1 in frame memory 3 621, frame memory 4 622
An operation of writing image data for a frame is performed. The write operation with reference to the memory write register 628 is 1
Even if the writing of the image data for the frame is completed, it continues without finishing. The data selection unit 3 642 and the data selection unit 3 643 are provided with a frame memory write / read destination switching signal 644 or a frame memory write / read destination switching signal from the frame memory reading unit 626.
Switching is periodically performed by 645, and the writing destination to the frame memory is alternately switched for each frame.

The reason that two frame memories are provided, each of the frame memory 1619, the frame memory 2 620, the frame memory 3 621, and the frame memory 4 622, is because, for example, the frame memory 1619 and the frame memory 2 620 are used. When writing and reading image data, performing an operation of reading image data from the frame memory 2 620 when writing image data to the frame memory 1619, and performing a frame memory 1 when writing image data to the frame memory 2 620. This is for performing the operation of reading the image data from 619. Frame memory 1619, frame memory 2 620 and frame memory 3 621, frame memory 4 6
The moving image data written in 22 is read by the frame memory reading means 626. Upon receiving the display image data switching signal 638 from the microcomputer 630, the frame memory reading means 626
9, after completing reading of one frame of image data from the frame memory 2 620 or the frame memory 3 621 and the frame memory 4 622 and transferring the image data to the enlarged data processing means 633, the memory read register 629 By sending the rewrite signal 639, the current LCD panel 602
Frame memory 1 619, frame memory 2 displayed in
620 or frame memory 3 621, the setting of the image data being read from the frame memory 4622 is rewritten with the setting of the image data to be displayed on the liquid crystal panel 602 from now on, and the data selection means 2 623 is switched by the image data reading destination switching signal 627. , And waits for reception of the next output timing signal 637 generated by the output timing signal generating means 634. Upon receiving the output timing signal 637, the frame memory reading means 626 refers to the memory reading register 629, performs an image data reading operation through the data selecting means 2 623, and converts the image data into the enlarged data processing means 63.
Send to 3.

The enlargement data processing means 633 performs enlargement processing on the image data with reference to the memory read register 629, and outputs the image data in synchronization with the output timing signal generated by the output timing signal generation means 634.
Output via 5. The output timing signal generation means 634
By periodically generating the output timing signal 637 and sending it to the frame memory reading means 626, the moving image data is displayed on the liquid crystal panel 602.

In the liquid crystal panel driving interface board 601 operating as described above, while displaying the moving image data on the liquid crystal panel 602, the setting of the image data to be displayed next is set together with the image data as control data. All or a part of the liquid crystal panel drive interface board 601 is sent to complete the setting of the image data to be displayed, and at the timing of switching the moving image display of the liquid crystal panel 602, all or part of the liquid crystal panel drive By sending display screen switching control data to the interface board 601, it is possible to simultaneously switch a high-resolution large-screen display of a moving image over a plurality of liquid crystal displays without disturbing the display image.

Interface board for driving a liquid crystal panel
By using the 601, while displaying image data as shown in FIG. 3, the display setting is made as shown in FIG. 4, and by switching the display image, the display image is not disturbed at the same time.
The image data can be displayed as follows.

Another embodiment will be described with reference to FIGS. 3, 4, and 7. FIG. 3 and 4 are as described above. FIG. 7 is a block diagram of the liquid crystal multi-display device of the present invention. 701 is a liquid crystal panel driving interface board, 702 is a liquid crystal panel, 703 is one image data bus among two systems of image input from an external system, and 704 is an image data to the next stage liquid crystal panel driving interface board 701. One image data bus to transfer, 705 is another image data bus in the two systems of image input from the external system, and 706 is another image data bus to transfer the image data to the next LCD panel drive interface board 701. An image data bus 707 is a control data bus for exchanging control data with an external system,
708 is the next level LCD panel drive interface board 7
709, 710 are input data processing means, 711 is control data processing means, 712, 713, 714, 715 are image data buses for transferring image data inside the liquid crystal panel driving interface board 701, 716 Are control data buses for transferring control data inside the liquid crystal panel driving interface board 701, and 717, 718 are data selection means 1, 719, 720 and 721, 722.
Are frame memories 1 and 2 in which image data of different moving images are written and read, respectively, frame memories 2 and 3, and frame memories 4 and 723 are data selection means 2, 724 and 725.
Is a frame memory writing unit, 726 is a frame memory reading unit, 727 is a read destination switching signal for image data, 728 is a memory writing register to be referred to by the frame memory writing units 724 and 725, and 729 is a reference to the frame memory reading unit 726. A memory readout register, 730 is a microcomputer that manages the ID unique to the liquid crystal panel drive interface board 701 and performs register setting, etc., 731,732 are input image data capture signals, 733 is enlarged data processing means, and 734 is output timing signal generation means. , 735 is an image data bus for transferring data to be displayed on the liquid crystal panel 702, 736 is a control signal bus for transferring an output timing signal (synchronous signal), 737 is an output timing signal, 738 is a display image data switching signal, and 739 is Register setting data storage unit, 740, 741 switches image data input destination Signals 742 and 743 are data selection means 3, and 744 and 745 are write / read destination switching signals for the frame memory.
In the following, in a liquid crystal multi-display device with two systems of image data input, when switching a high-resolution large-screen display of a moving image over multiple liquid crystal displays to another display screen, the operation of simultaneously switching to the moving image display without disturbing the displayed image. Will be described.

In the liquid crystal panel driving interface board 701 in FIG. 7, the microcomputer 730 and the frame memory reading means 726 in FIG. 7 operate differently from the liquid crystal panel driving interface board 601 in FIG. Other means and the like operate in the same manner as in FIG. The operations of the microcomputer 730 and the frame memory reading means 726 in FIG.
Since the microcomputer 524 and the frame memory reading means 520 are the same, the description is omitted.

Therefore, in the liquid crystal panel driving interface board 701 shown in FIG. 7, when the moving image data is displayed on the liquid crystal panel 702, the setting of the next image data to be displayed is all performed together with the image data as control data. To some or a part of the liquid crystal panel drive interface board 701, the setting of the image data to be displayed from now on is completed, and all or part of the liquid crystal panel drive interface By sending the control data for switching the display screen to the board 701, it is possible to simultaneously switch the high-resolution large-screen display of a moving image over a plurality of liquid crystal displays without disturbing the display image. By using the liquid crystal panel drive interface board 701, display settings are made as shown in FIG. 4 while image data is being displayed as shown in FIG. 3, and display images are switched at the same time by switching display images without disturbing the display images. Image data can be displayed as shown in FIG. Also, determination of resolution and display mode based on input data of a plurality of input systems, for example, 640 × 4 in case of VGA
80, 800x600 for SVGA, 60MHZ
By setting refresh rates such as z and 65 MHz, frame memories 1, 2, 3, 4, 719, 720, 72
It is possible to programmatically set the area to be used by 1,722, and to effectively use the frame memory.

Another embodiment will be described with reference to FIG. FIG. 8 shows an application example as a liquid crystal multi-display system configured using the liquid crystal multi-display device of the present invention. 801 is an interface board for driving a liquid crystal panel, 802 is a liquid crystal panel, 803 is an external system device that sends image data and control data to a liquid crystal multi-display device, 804 is display screen control means for controlling image data displayed on the liquid crystal panel, 805 is an image data storage unit for storing image data, 806 and 807 are image data transmitting means for transmitting image data, 808 is control data transmitting and receiving means for transmitting and receiving control data, and 809 is a display of image data to be transmitted. Image data display means 810 is a data bus in the external system device 803, 811, 812, 813, 814 and 815 are image data buses, and 816 and 817 are control data buses. Below, 2
The operation of a liquid crystal multi-display system configured using a liquid crystal multi-display device having a system of image data input will be described.

Display screen control means 8 of external system device 803
From 04, information about image data to be displayed on the liquid crystal panel 802 is transmitted to the image data transmitting unit 806 or the image data transmitting unit 807, and the image data transmitting unit 806 also receives the information. At the same time, the image data is read out from the image data storage unit 805, and is sent to each liquid crystal panel driving interface board 801 through the image data bus 811 or 813, and is also sent to the image data display unit 809. The image data sent to the image data display means 809 is displayed on the image data display means 809, and the external system device 803 can know what kind of image data is being sent.

The display screen control means 804 of the external system device 803 sends information to the control data transmission / reception means 808 on a display form of how to display image data on the liquid crystal panel 802. means
808 sends the display mode as control data based on the information and receives the data returned from each liquid crystal panel driving interface board. According to the received data, each LCD panel drive interface board 801
Can be read from the external system device 803 via the microcomputer. The operation of each liquid crystal panel driving interface board 801 is as described above.

Therefore, in the liquid crystal multi-display system shown in FIG. 8, while still image data or moving image data is being displayed on the liquid crystal panel 802, setting of the next image data to be displayed is performed by the external system device 803 through the control data. As well as image data to all or some of the LCD panel drive interface boards 801 to complete the setting of image data to be displayed,
By transmitting control data for switching the display screen from the external system device 803 to all or some of the liquid crystal panel driving interface boards 801 at the timing of switching the moving image display of the 802, a still image or a moving image over a plurality of liquid crystal displays is transmitted. High-resolution large-screen display can be simultaneously switched without disturbing the display image.

[0048]

According to the liquid crystal multi-display device of the present invention, two frame memories are provided for a still image and four frame memories are provided for a moving image in accordance with image data to be displayed on a liquid crystal display. When another image data is written in the frame memory while displaying, and when switching from a high-resolution large-screen display to a different display screen over a plurality of liquid crystal displays, it is only necessary to change the reading destination from the frame memory. In addition, there is an effect that it is possible to simultaneously switch the still image display or the moving image display without disturbing the display image.

[Brief description of the drawings]

FIG. 1 is a block diagram of a liquid crystal multi-display device of the present invention.

FIG. 2 is a block diagram of a conventional multi-display system.

FIG. 3 is a diagram showing an example of high-definition large-screen display image data on a four-panel liquid crystal multi-display.

FIG. 4 is a diagram showing an example of high-definition large-screen display image data on a four-panel liquid crystal multi-display.

FIG. 5 is a block diagram of the liquid crystal multi-display device of the present invention.

FIG. 6 is a block diagram of the liquid crystal multi-display device of the present invention.

FIG. 7 is a block diagram of the liquid crystal multi-display device of the present invention.

FIG. 8 is a diagram showing an application example as a liquid crystal multi-display system configured using the liquid crystal multi-display device of the present invention.

[Explanation of symbols]

101 ... LCD board driving interface board, 1
02: liquid crystal panel, 103: image data bus, 104:
Image data bus, 105: Image data bus, 106: Image data bus, 107: Control data bus, 108: Control data bus, 109: Input data processing means, 110:
Input data processing means, 111 ... control data processing means,
112: image data bus, 113: image data bus, 1
14 control data bus, 115 data selection means 1, 1
16: Frame memory 1, 117: Frame memory 2, 118: Data selection unit 2, 119: Frame memory writing unit, 120: Frame memory reading unit, 121: Read destination switching signal, 122: Register for writing to memory, 123: Memory Read register, 124 ... microcomputer, 125
... input image data input signal, 126 ... enlarged data processing means, 127 ... output timing signal generation means, 128 ... image data bus, 129 ... control signal bus,
130: output timing signal, 131: display image data switching signal, 132: register rewriting signal, 133
... input destination switching signal 201 ... monitor unit 202
... image input unit, 203 ... A / D converter, 204
... Memory selection unit, 205, Image memory 1, 206, Image memory 2, 207, Switching operation unit, 208, D
/ A converter, 209: display unit, 210: control signal receiving unit, 211: decoding unit, 212
... Reception control signal memory, 213 ... ID setting unit,
214 monitor system memory 215 monitor monitor 216 image transmitter 217 image signal generator 218 image transmitter 219 monitor ID register 220 program code generator 221
... frame number generating section, 222 ... sync adjusting section, 223 ...
Control signal sending section, 224 ... Control signal synthesizing section, 22
5 monitor monitor program memory 22
6: control unit, 227: system memory, 228
... image signal line, 229 ... digital control line.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 5/00 550 G09G 5/00 550R (72) Inventor Hideki Kamimaki 1099 Ozenji Temple, Aso-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Toshiyoshi Ueoka 3681 Hayano, Mobara-shi, Chiba Hitachi Device Engineering Co., Ltd. (72) Satoshi Onuma 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture, Ltd. Hitachi Image Information System (72) Inventor Tomohisa Kohiyama 1099 Ozenji Temple, Aso-ku, Kawasaki City, Kanagawa Prefecture Inside Hitachi, Ltd.System Development Laboratory (72) Inventor Hitoshi Suzuki 810 Shimoimaizumi, Ebina City, Kanagawa Prefecture Hitachi, Ltd. PC Division (72) Inventor Kazushi Kobayashi Ebina, Kanagawa 810 Shimo-Imaizumi F-term in PC Division, Hitachi, Ltd. (Reference) BA34 BA35 BA41 BB01 BB15 BB25 BB26 BD07 CA76 CA85 CB05 DA53 MM00 MM10

Claims (5)

[Claims] A liquid crystal panel for displaying image data, a liquid crystal panel driving interface board for controlling image data to be displayed on the liquid crystal panel and having a plurality of systems for inputting image data, and a plurality of liquid crystals. In the liquid crystal multi-display device, the liquid crystal panel driving interface board comprises a plurality of input data processing means, a plurality of data selection means, a frame memory writing means, a memory writing register, a frame memory reading means, a memory reading register, a plurality of A frame memory composing unit, an enlarged data processing unit, an output timing signal generating unit, a control data processing unit, a microcomputer, and a control signal for sending and receiving instructions to and from the microcomputer. Write each image data independently Switching between high-resolution large-screen still image display of the plurality of liquid crystal panels by switching all the liquid crystal panel display data of a liquid crystal multi-display device including a plurality of liquid crystal panels. Display device. 2. A liquid crystal multi-display device according to claim 1, wherein, while displaying while inputting arbitrary image data from one input, means for writing arbitrary image data from another input to a frame memory. A liquid crystal multi-display device comprising: 3. The liquid crystal multi-display device according to claim 1, further comprising means for reading out image data from another input from a frame memory and switching display contents according to a command to a microcomputer. Multi-display device. 4. The liquid crystal multi-display device according to claim 1, wherein the microcomputer is provided with a register setting data storage unit for storing a value set in a memory read register. apparatus. 5. The liquid crystal multi-display apparatus according to claim 1, wherein the liquid crystal multi-display device according to a display mode such as a resolution of image data to be displayed.
A liquid crystal multi-display device comprising a register for setting writing to the frame memory and reading from the frame memory for each arbitrary input.