JPH04138576A - Display device - Google Patents

Abstract

PURPOSE:To easily reproduce a display image by updating a display image in accordance with display information to form an updated image and forming and outputting a restoration information for returning the updated information to an image obtained before the input of the display information. CONSTITUTION:A data processing circuit 10 updates the contents of an image memory 12 based upon display information DT, DI and displays the updated contents on a CRT 14. A display image is successively updated based upon the successively inputted display information DT, DI. At that time, the circuit 10 generates restoration information DF for turning back to an image obtained before the input of the display information DT, DI in accordance with the display information DT, DI and outputs the generated information DF to a host computer 2. Thus, a display image can simply be reproduced based upon an image in displaying.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a display device, and is suitable for application to, for example, an air traffic control system.

B Summary of the Invention The present invention provides a display device that outputs restoration information that restores an updated image to the image before the input of the display information in accordance with the display information, so that the display can be displayed based on the restoration information as necessary. The image inside can be updated and the displayed image can be easily reproduced.

C. Prior Art Conventionally, in a display device for an air traffic control system, a display image is sequentially updated based on display information input from a host computer, an input device of a terminal, or the like.

This allows air traffic controllers to operate the aircraft while monitoring the constantly changing position of the aircraft via the displayed image.

Problems to be Solved by the Invention In this type of air traffic control system, once an accident or the like occurs, it is necessary to reproduce the conditions before and after the accident.

In other words, it is necessary to reproduce the displayed images before and after the accident and confirm what kind of command the air traffic controller issued based on what kind of displayed images.

For this reason, in conventional air traffic control systems, display information that is sent out sequentially is stored in an external storage device.

However, this type of air traffic control system is characterized by continuous operation for long periods of time, and may be used continuously for several years or more unless an accident occurs.

In this case, the currently displayed display image is generated by sequentially updating an initial screen from several years ago.

Therefore, when display information is stored in an external storage device in this way, there is a problem that an external storage device with a large capacity is required.

One possible method for solving this problem is to send image information of a display image to the host computer at predetermined intervals.

That is, the host computer stores the image information together with display information subsequent to the image information.

In this way, by simply storing the image information for a predetermined period and the display information after the image information, it is possible to reproduce the display image for the period.

However, when sending the image information of the displayed image to the host computer, since the image information has a data amount of several MB, it takes time to send the image information, and in practice it cannot be processed in real time. There was a problem that was difficult to solve.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose an image display device that can easily reproduce display images.

Evil! Means for Solving the Problems In order to solve this problem, the present invention provides a display device 1 that forms a display image according to display information DI and DT that are sequentially input. Restoration information DF that updates to form an updated image and restores the updated image to the image before inputting the display information DI and DT.
Generate and output.

If the restoration information DF that returns the F effect updated image to the image before inputting the display information DI and DT is generated and output, the restoration information DF can be accumulated as necessary, and the restoration information DF can be stored based on the restoration information DF. The image being displayed can be updated, and the original display image can be easily reproduced.

G example An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a display device of the air traffic control system as a whole, and 6, which sequentially updates a display image based on display information DT and DI inputted from a host computer 2 and an input device of a terminal. The input circuit 8 accesses a built-in memory circuit in response to operations on the keyboard 6 and mouse 8, thereby generating display information DI and outputting it to the data processing circuit 10.

Here, the input circuit 8 is configured to process display information generation processing as a collection of basic elements, and correspondingly store the processing contents in a memory circuit.

In other words, the input circuit 8 inputs "J to which the mouse 8 was moved,"
When a basic action such as "a key is turned on" is detected, the event table corresponding to each action is referred to and the corresponding processing content is selected.

Further, information such as "the amount of mouse movement" and "the type of key that was turned on is detected, and the corresponding display information DI is generated from the selected processing content."

Thereby, the input circuit 8 can update each processing content with the output data of the host computer 2 as necessary, and can easily change or add processing content.

The data processing circuit 10 updates the contents of the image memory 12 based on the display information DT and DI, and displays it on the cathode ray tube 14.

Thereby, the data processing circuit IO is configured to sequentially update the display image based on the display information DT and DI that are sequentially input.

At this time, the data processing circuit 10 generates restoration information DF corresponding to the display information DT and DI to restore the updated display image (hereinafter referred to as an updated image) to the image before inputting the display information DT and DI, and Output to 2.

That is, as shown in FIG.
When the display information DI for displaying J is input, the data processing circuit 10 displays the characters "J" at a predetermined position based on the display information.
A” is displayed.

Furthermore, in response to the display information displaying the letter "A", restoration data DF for erasing the letter 'AJ' is generated and outputted to the host computer 2 with time information attached thereto.

Similarly, when display information DT for switching the display color to red is input from the host computer 2, the data processing circuit 1
0 switches the display color mode from blue to red.

Furthermore, the data processing circuit 10 generates restoration information DF for switching the display color to blue in response to the display information DT for switching the display color to red, and outputs it to the host computer 2 with time information attached thereto.

In response to this, the host computer 2 is configured to store the sequentially input restoration information DF and time information in a memory circuit, and when the memory circuit becomes full, it sequentially erases the old restoration information DF and time information. New restoration information DF and time information are stored.

Furthermore, when restoring a display image, the host computer 2 sequentially outputs restoration information DF to the data processing circuit 10 starting from the latest information.

Thereby, the data processing circuit 10 reproduces a display image based on the image currently being displayed instead of the conventional initial screen.

That is, the data processing circuit 10 sequentially updates the image being displayed based on the restoration information DF, thereby restoring the displayed image so that the time is reversed.

When the state of the displayed image returns to the desired point in time, the host computer 2 restores the restoration information D based on the restoration information DF.
Display information DI and DT, which are the basis for F generation, are generated and sequentially output to the data processing circuit 10 in chronological order.

As a result, the data processing circuit 10 processes the display information DI,
Based on the DT, the displayed images returned to the desired point in time are sequentially updated, and thus the displayed images can be sequentially reproduced from the desired point in time.

At this time, by generating the restored data DF and reproducing the display image based on the image currently being displayed, the capacity of the storage means is significantly reduced compared to the case where the display information is sequentially accumulated on the host computer 2 side. The displayed image can be easily reproduced.

In the above configuration, when the display information DI, DT is input from the input circuit 4 or the host computer 2, the data processing circuit 10 updates the contents of the image memory 12, thereby generating an updated image.

At this time, restoration data DF for restoring the updated image to the original image is generated and sequentially stored in the host computer 2.

When reproducing a display image, the restored data DF accumulated in the host computer 2 is output to the data processing circuit 10 in order from the latest one, so that the image being displayed is sequentially updated based on the restored information DF, The displayed image is restored so that time is reversed.

When the state of the display image returns to the desired point in time, the host computer 2 generates display information DI and DT, which are the basis for generating the restoration information DF, and sequentially outputs them to the data processing circuit 10 in chronological order.

Thereby, the display image returned to the desired time point is sequentially updated based on the display information DI and DT, and the display image can be reproduced from the desired time point.

According to the above configuration, by generating the restoration data DF that restores the updated image to the original display image and storing it in the host computer 2, it is possible to easily reproduce the display image based on the currently displayed image. .

In the above-described embodiments, the present invention is applied to an air traffic control system, but the present invention is not limited to this, and can be widely applied to the reproduction of display images in various electronic devices.

Effects of the Invention As described above, according to the present invention, by generating and outputting the restoration data that restores the updated image to the original image, it is possible to easily reproduce the displayed image based on the currently displayed image. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a display device according to an embodiment of the present invention, and FIG. 2 is a route map for explaining its operation. DESCRIPTION OF SYMBOLS 1... Display device, 2... Host computer, 4... Input circuit, 10... Data processing circuit, 12... Image memory .

Claims (1)

[Claims] In a display device that forms a display image according to display information that is sequentially input, the display image is updated according to the display information to form an updated image, and the updated image is updated according to the display information. 1. A display device that generates and outputs restoration information for returning to an image before it was input.