JP3030055B2 - Image playback device - Google Patents

Description

The present invention relates to a device for reproducing an image signal output from an image output device such as a personal computer or a magnetic recording / reproducing device on a monitor.

(B) Conventional technology In such an image reproducing apparatus, an image output apparatus and a monitor correspond one-to-one, and an image signal output from the image output apparatus is generally reproduced on a monitor in real time. In such a configuration, only one type of image can be monitored by one system of image output device.

(C) Problems to be Solved by the Invention Image output devices include video tape recorders and televisions having a built-in image memory. Such an image output device monitors different types of images. Is possible, but different types of images cannot be monitored simultaneously.

Therefore, the present invention provides an image reproducing apparatus that can display different screens on a plurality of monitors by using one image output apparatus.

(D) Means for Solving the Problems In order to solve the above problems, an image reproducing apparatus according to the present invention is connected to an image output device and an image signal output terminal of the image output device and splits an image signal into a plurality of signals. And a plurality of screens each of which stores one screen of an image signal provided according to the number of branches by the image branching circuit and to which a read signal is always applied. A memory, a plurality of monitors provided corresponding to the screen memory, receiving a synchronization signal from an image branching circuit, and reproducing an image signal stored in the corresponding screen memory in synchronization with the synchronization signal; An image memory that receives a synchronization signal from a branch circuit, outputs address data and a write signal, and stores an image signal output from the image output device from among the plurality of screen memories And control means for selecting a screen memory storing an image to be displayed on the monitor.

(E) Function When the image output device outputs an image signal, the image branching circuit branches and outputs the image signal to each screen memory so that the image signal is input, and outputs a synchronization signal. At this time, when the control means selects the screen memory for storing the image signal by outputting the address data and the write signal, the monitor also receives the synchronization signal, and the screen memory to which the read signal is always applied is the screen signal. Is input and stored, and a monitor corresponding to the screen memory performs a display operation using the image signal and the synchronization signal. Then, the monitor corresponding to the non-selected screen memory continues to display the same screen based on the address data from the control means, because the non-selected screen memory retains the previously stored image signal.

(F) Embodiment FIG. 1 is a block diagram showing an image reproducing apparatus according to the present invention, wherein 1 is an image output device by a personal computer, and 2 is an image branch circuit connected to a monitor-output terminal of the image output device 1. , 3 ₁ to 3 _N screen memory provided in accordance with the number of branches by the image branch circuit 2, a control means for selecting the screen memory 3 ₁ to 3 _N for performing storage operations 4, 5 ₁ to 5 _N screen memory 3 Monitors provided for _{1 to} 3 _N.

The image output device 1 outputs the RGB data and synchronization signals as the image signal, but the image branch circuit 2, as shown in FIG. 2, RGB from the image output apparatus 1 is in each screen memory 3 ₁ to 3 _N
Outputs data, the control unit 4 and the monitor 5 ₁ to 5 _N and outputs a synchronizing signal S. Then, the control unit 4 controls the operation of storing screen memory 3 ₁ to 3 _N by the address data to be output through write signal WE and an address bus 6. That is, when the vertical synchronizing signal is input, the control means 4 outputs the write signal WE and the address data for one vertical scanning period until the next vertical synchronizing signal is input. RGB data for one screen to be able to be stored in the screen memory 3 ₁ to 3 _N a.

Also, the screen memory 3 ₁ to 3 _N is maintained at the read operation is ready read signal RE is always applied,
When the address data from the control means 4 through the address bus 6 is introduced, and outputs to the monitor 5 ₁ to 5 _N in question reads RGB data stored on this basis. When the monitor 5 ₁ to 5 _N is RGB data is input, the image output device 1
One screen of image is displayed in synchronization with the synchronization signal introduced from.

In the above configuration, the control unit 4, when displaying the RGB data by the image output device 1 outputs in real time, the screen memory 3 ₁ by monitor 5 ₁ to 5 _N to be displayed
Outputs a write signal WE to to 3 _N. Then, when displaying a specific screen still image, when the image output device 1 outputs the RGB data for the screen, the control unit 4, the screen memory corresponding to the monitor 5 ₁ to 5 _N to be displayed outputs a write signal WE with respect to 3 ₁ to 3 _N. Thus, the monitor 5 ₁ to 5 _N can then control unit 4 displays the same screen to the output of the write signal WE to the screen memory 3 ₁ to 3 _N corresponding to the monitor.

In the present embodiment, the personal computer has been described as the image output device 1. However, a device that outputs a television signal as an image signal may be used. When such a device that outputs an analog signal to an image signal is used as the image output device 1, It is necessary to provide an A / D converter before the image branch circuit 2 and a D / A converter after the screen memory.

Next, a product ordering device will be described as an example of using the image reproducing device of the present invention. The product ordering device displays information about a product or an order on a screen, and performs an order operation by performing an input operation based on the display. As shown in FIG. 3, a guidance screen such as a product photograph and an operation guide is provided. , A liquid crystal display screen 11 for displaying an operation screen for asking a customer for an order in an order procedure, and a key input device 12 for the customer to perform an order operation.

FIG. 4 shows a block configuration of the commodity ordering apparatus.
13 is a controller that controls the entire product ordering device, 18 is a CR
A CRT monitor for displaying a screen on the T display screen 10, a liquid crystal display module 20 for displaying a screen on the liquid crystal display screen 11, and a CRT display screen 10 and a liquid crystal display screen by a switching circuit 19 connected to the monitor terminal of the controller 13. 11 and different screens can be displayed. This switching circuit 19
The above-described image branch circuit and the screen memory are included. The screen memory includes two types of memories corresponding to the CRT display screen 10 and the liquid crystal display screen 11, respectively. Further, in this product ordering apparatus, the controller 13 has a function of a control means for selecting one from a plurality of screen memories.

The commodity ordering apparatus has a hard disk device 14 as an external storage device.
Includes an area for storing RGB data for displaying a graphic image such as character information on the CRT display screen 10 and the liquid crystal display screen 11. And, in this storage area, RGB data for displaying the guidance screen on the CRT display screen 10, and
The LCD 13 stores RGB data for displaying an operation screen on the liquid crystal display screen 11. The controller 13 reads the RGB data from the hard disk drive 14 and outputs the RGB data from the monitor terminal 15. The write signal WE and the address data AD are output to the screen memory. Therefore, although the monitor terminal 15 of the controller 13 in this product ordering device is one, the CRT display screen 10 and the liquid crystal display screen 11 are switched between the guidance screen and the operation screen, which are different screens, by the switching circuit 19. You can do it.

Hereinafter, the operation of the product ordering apparatus will be described with reference to an example of a display screen.

First, in the standby state, the CRT display screen 10 displays an explanation screen (FIG. 5) of the product search method, and the liquid crystal display screen 4
Displays an input operation screen (FIG. 6) of a product search method. Therefore, the controller 13 changes the screen shown in FIG.
T Monitor terminal for RGB data to be displayed on display screen 10.
When outputting from 15, the address data and the write signal WE are output to the screen memory (CRT screen memory) corresponding to the CRT display screen 10. Thereby, the CRT monitor 18 displays the screen shown in FIG. 5 based on the RGB data stored in the CRT screen memory. This guidance screen has three ways to search for products ordered by customers: a method of directly selecting by product number, a method of searching by prefecture name, and a method of selecting from a list of recommended products preset on the machine. It indicates that there is.

When outputting RGB data for displaying the screen shown in FIG. 6 on the liquid crystal display screen 11 from the monitor terminal 15,
The address data and the write signal WE are output to a screen memory (liquid crystal screen memory) corresponding to the liquid crystal display screen 11. Thereby, the liquid crystal display module 20 displays the screen shown in FIG. 6 based on the RGB data stored in the liquid crystal screen memory. This operation screen describes a key operation for specifying a search method.

When the customer selects a search method by operating the numeric keypad corresponding to the desired search method, the CRT display screen 1
0 and the liquid crystal display screen 11 respectively display new screens. At this time, if the search method is selected from the prefecture name, a guidance screen (FIG. 7) for explaining the prefecture selection input is displayed on the CRT display screen 3 and the liquid crystal display screen 4 is displayed.
Is an operation screen that supports selection of prefectures (Fig. 8)
Is displayed. Therefore, as described above, the controller 13
Loads the respective RGB data into the CRT screen memory or the liquid crystal screen memory via the switching circuit 19.

In this way, this product ordering device is displayed on the CRT display screen 1
A guidance screen and an operation screen are displayed on 0 and the liquid crystal display screen 11, respectively, and the customer can perform an input operation based on the display screen to search for a product to order.

(G) Effects of the Invention According to the present invention, a plurality of types of images can be displayed on a plurality of monitors from one image output device. Therefore, since different information and images can be displayed on a plurality of screens, not only can a variety of multi-screen configurations be provided, but also the screen memory always inputs a read signal,
Since the reading operation is maintained, an image signal is output when an address signal is input from the control device.
Images can be immediately displayed on the corresponding monitor in synchronization with the synchronization signal.

The control means outputs an address signal when the image signal is stored in the image memory, and outputs an address signal to the image memory when the image signal is displayed on the monitor. The control means stores the image signal in the image memory and monitors the image signal. , The display switching can be easily controlled, and the image reproducing apparatus can be simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the present invention, FIG. 2 is a specific configuration diagram, FIG. 3 is an external view of a product ordering device, FIG. 4 is a block diagram showing the configuration of the product ordering device, 5 to 8 show examples of display screens in the commodity ordering apparatus. FIGS. 5 and 7 show examples of guidance screens displayed on a CRT display screen. FIGS. 6 and 8 show liquid crystal displays. It is a display example of the operation screen displayed on a display screen. 1 ... image output apparatus, 2 ... image branch circuit, 3 ₁ to 3 _N ... screen memory, 4 ... control unit, 5 ₁ to 5 _N ... monitor.

Claims (1)

(57) [Claims] An image output device, an image branch circuit connected to an image signal output terminal of the image output device, for branching and outputting an image signal and outputting a synchronization signal, and branching by the image branch circuit A plurality of screen memories to which one screen of image signals provided according to the number is stored and to which a read signal is always applied, and a synchronization signal provided from the image branch circuit provided corresponding to the screen memories are inputted. A plurality of monitors for reproducing image signals stored in a corresponding screen memory in synchronization with the synchronization signal, a synchronization signal is input from an image branch circuit, an address signal and a write signal are output, and a plurality of the An image memory for storing an image signal output from the image output device is selected from a screen memory, and a screen memory for storing an image to be displayed on the monitor is selected. Image reproducing apparatus comprising a control unit.