JPS6266324A - Crt screen display system - Google Patents

Abstract

PURPOSE:To improve a response speed by accepting only an up-to-date display request, thinning out past display requests, and eliminating transmission delay when plural display requests are inputted successively within a constant time. CONSTITUTION:It is judged whether there is a display request or not and when there is the display request, let n=1 and it is judged whether the display on a CRTn is completed or not. When so, display requests to the CRTn are extracted and thinned out by accepting the up-to-date display request while discarding other display requests. A display screen image corresponding to the extracted display request is generated to let n=n+1 and confirm that all CRTs are completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a CRT screen display system, and particularly to a CRT screen display system that handles a case where a plurality of display requests are sequentially input.

[Technical Background of the Invention] FIG. 4 is a block diagram showing the configuration of a conventional CRT screen display system, and FIG. 5 is a time chart for explaining the operation. When displaying on the screen, a screen display request (a) with the display CRT number and display screen number added is input to the screen request unit 1, and this is passed to the screen request receiving unit 2 as screen request data 3. (b), and these are processed in the order of input. Here, screen image creation request data 5 is passed to the display screen image creation section 4 in accordance with the screen request data 3 (C), and display processing is performed based on this.

[Problem in the Background Art 1] In the conventional method described above, if a display request is made at a cycle shorter than the time required for screen display processing, there is no time to view the previously displayed screen and the screen is immediately erased and becomes invalid. Regardless, display processing is performed sequentially.

In addition, in the case of a display system such as a remote CRT device in which the display screen image creation unit 4 and the screen display unit 8 are separated into different locations and the display screen image is transmitted between them, the display screen image creation unit 4 and the screen display unit 8 are The display screen image created by the unit 4 needs to be held until the processing by the screen display unit 8 is completed, and as a result, a large number of display screen image holding areas 7 are required. Moreover, system resources for securing this holding area are limited, and there is no way to recover from data loss due to lack of this holding area.

[Purpose of the Invention] The present invention has been made to solve the above-mentioned problems, and is capable of rationally responding to sequentially input screen display requests without increasing the load. It is an object of the present invention to provide a CRT screen display method that is fast and can further reduce the display screen image holding area 7.

[Summary of the Invention] According to the present invention, when a plurality of display requests are received within a certain predetermined time period, only the latest display request is accepted and processed, and the previous display requests are thinned out.

[Embodiments of the invention] Examples will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment for explaining a CRT screen display method according to the present invention. In Figure 1, the fourth
The same parts as those in the figures are given the same reference numerals and the explanation will be omitted.

2-1 is the screen request section, which receives only the latest display request when there are multiple display requests within a certain period of time through the processing described later. It has a function of thinning out the display requests inputted in. 6-1 is display request data, and 7-1 is a display screen image holding area, each of which is provided with the same number of CRTs.

FIG. 2 is a time chart showing the processing contents of the screen request receiving section. First, the screen request receiving section 2-1 is activated by the screen requesting section 1, and at this time, screen display request information with a CRT number and a screen number attached is registered as screen request data 3. FIG. 2(a) shows display requests in chronological order. The screen request reception unit 2-1 uses a predetermined reception reference time T.
o is set in advance, and only the latest display request within this time is accepted. Note that the acceptance standard time To is determined in advance, taking into consideration that there are screen display request information ranging from large to small, and is determined in advance by the screen display request received last time. This is because if the information is small, the processing time of the display screen image creation unit 4 based on this information may be shortened, and the next received screen display request information may be processed.
In the case shown in the figure, time 1. Regarding the screen display request information received at
The thinned-out state is displayed even though the display request is the latest one within the current range. Therefore, the predetermined time for completely accepting the requested screen display request information is determined by the size of the previously input screen display request information. Note that the X marks in FIG. 2 indicate thinned out display requests.

FIG. 3 is a flowchart showing the processing contents of the screen request receiving section. That is, as is clear from the screen, the CRT
The latest display request to that CRT is processed only when the processing for that CRT is completed.

In FIG. 3, in step 31 it is determined whether or not there is a display request, and if there is a display request, n=1 is set in step 32, and then the process moves to step 33 to check whether the display of CRlrL is completed or not. Decide whether or not. In step 33, if the display of the CRTrL has been completed, the process moves to step 34, where display requests to the CRTfL are retrieved, the latest of which is accepted, and previous display requests are discarded. That is, thin out. Furthermore, the process moves to step 35 to create a display screen image in response to the retrieved display request, and in step 36 n=n→1 is set, and in step 37 it is confirmed that all CRTs are completed. In short, the process returns from step 37 to step 33 and repeats the process until the display request process for all CRTs is completed. If all is completed, the screen image creation section is updated in step 38 and the process returns to step 31.

If it is determined at step 33 that the CRT has not completed displaying, the process moves to step 36 and the above process is performed for the next CRT. In addition, in step 31, if there is no screen request, the process moves to step 39, and after a predetermined time delay, the process is repeated until the next screen request is received.

As described above, it is possible to receive and process only the latest screen display request information within the processable time.

[Effects of the Invention] As explained above, according to the present invention, when a plurality of display requests are sequentially input within a certain predetermined time, only the latest display request is received and processed, and the previous display requests are thinned out. This eliminates transmission congestion, increases response speed, and reduces computer load. Furthermore, since the display screen image holding area can be made equal to the number of CRTs, computer resources are saved and data loss due to lack of holding area is eliminated.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the CRT screen display method according to the present invention, FIG. 2 is a time chart explaining the operation in FIG. 1, and FIG. 3 is a diagram of the screen request reception section of FIG. Flowchart showing processing contents] FIG. 4 is a configuration example diagram illustrating a conventional CRT screen display method, and FIG. 5 is a time chart illustrating the operation in FIG. 4. 1... Screen request section 2.2-1... Screen request reception section 3... Screen request data 4... Display screen image creation section 5... Screen image creation request data 6.6-1. ...Display request data 7.7-1...Display screen image holding area 8...
Screen display section 9...CRTTo...Reception standard time

Claims (1)

[Claims] In a CRT screen display method in which a computer system displays a screen on a CRT display in response to a screen display request, if multiple display requests are received within a certain set time, only the latest display request within that time is displayed. A CRT screen display method characterized by processing reception and thinning out previous display requests.