JPS5965883A - Display control system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention particularly relates to a display control method for displaying display data with different numbers of displayed characters on the same display screen, particularly in an online conversation terminal.

(2) Conventional technology and problems A conventional display control method will be explained using FIG.

Figure 1 (al, (b), (C1) respectively show the screen of the display device. Figure 1 (a) shows the display screen that displays display data of N rows and columns. Figure 1 (b), (c ) indicates a display screen that displays display data of M rows and columns (M>N).

In the figure, blank squares are areas for displaying characters, diagonal fi!
The part represents the line spacing.

In FIG. 1(a), display data of N rows and 1 column is displayed on a display device with N rows and columns of characters, and t
ct is the case when display data of M rows and 1 column is displayed on a display device with M rows and columns of characters.If the number of characters displayed is increased, the area of the CRT screen is limited, so the size of the characters is If it is kept constant, the line spacing in FIG. 1(c) will be narrower than in FIG. 1(a). As a result, when the display data in Figure 1(a) is displayed on the screen in Figure 1(C), the line spacing is narrower than in Figure 1(a), making it difficult to see as shown in Figure 1(b). This was a waste of time as it left the display area at the bottom of the screen.

(3) Purpose of the invention
Even when display data with M rows, 1 column, 8 rows and columns) is displayed using the same display screen, the undisplayed area should be placed between the rows! ! 1
．． ! The purpose of this display control method is to eliminate at least the number of lines that should be displayed on the screen by increasing the number of lines displayed on the screen. a display device capable of displaying display data for the specified number of ladles; and a control circuit that adjusts Ifjl intervals between lines to be displayed according to the specified number of lines; This is achieved by providing a display control method characterized in that the spacing in the row direction of display data is varied according to the number of rows data designated by a designating means.

(5) Central examples of the invention The present invention will be described in detail below based on examples.

The brown figure 2 shows Table 2J of the screen for explaining the present invention in detail. In Figure 2, the shaded area, each square, and M
, N, A' represent the same as in FIG. , with the conventional display control method, the number of characters displayed is M lines! When the display data of 8 rows and 1 column is displayed using column display r+t, an unmarked area is left at the bottom as shown in FIG. 2 (aJ).

In the present invention, this undisplayed area is allocated between lines and displayed using the entire screen as shown in Figure 2 (bJ).To do this, control is performed to satisfy the following conditions. αxM'=βxN (b) α x!T1 Nini β x n (c) Horizontal synchronization times are equal.

In (a) and (b), α is the number of lines for one line of a display device with M rows and 1 column of characters displayed, and β is 1 of 8 rows and 1 column of characters displayed.
The number of lines in a row, including the number of lines between each row,
mf1 The number of vertical synchronization lines for the number of characters displayed in M rows and one column, and n is the number of vertical synchronization lines for the number of characters displayed in N rows and one column. (The conditions for (c) will be discussed later.

The condition (a) is the number of lines α for each number of displayed characters such that the number of lines on one screen (αXM, βXN) for each number of displayed characters is approximately equal.

This is a condition for determining β. By satisfying this conditional expression, it is possible to allocate each row approximately equally, using the undisplayed area as a space between rows.

FIG. 3 shows an example of the display control force formula 71IifI according to the present invention.
FIG.

In the drawing, 1 is a line number designation register, 2 is a row number register, which constitute designation means, 3゜41'i comparison circuit, 5I'i, character counter, 6tI'i line counter, 7 is line counter, ll is the display mode switching circuit 14
f'i control circuit, 15ij: CI7T. Further, 8 is a clock generation circuit, 9 is a horizontal synchronization circuit, 1o is a vertical synchronization circuit, 12 is a video generation circuit, and 13 is a CkT control circuit, which constitute a control circuit 14.

By command of the operator or the like, α and β that satisfy the condition (a) are specified in the line number specification register 1, and the line numbers M and N are similarly specified in the line number specification register 2. It is possible for an operator or the like to select the number of characters to be displayed by switching the answers in registers 1 and 2 using a changeover switch or the like.

Next (the condition for mouth j is that in order to move the bright spot to the scan end point or the scan start point, in M rows and 1 column display, 11 rows, that is α × 1
]] When the time required for in-scanning is required, the β×n line scanning time h1J required for N×1 display should be made equal to h1J. According to this condition (b), M row 1 column display and N
There is no need to change the timing of outputting the horizontal synchronizing signal and video signal to the CRT control circuit 13 depending on the row and column display. This is because the times at which the bright spots exist at the scan opening points are the same.

Next, an example of the operation of the block diagram in FIG. 3 will be explained. 1st
The character counter 5 counts the number of characters in the lateral force direction up to the value rllJ while marking the line of the kome. When this count reaches the value rllJ, 1 is added to line counter 6,
The line counter 6 outputs a signal indicating the end of running of the lth line to the horizontal synchronization circuit 9, and generates the next horizontal synchronization signal. The scanning of the second and subsequent lines is performed in the same manner. The 2-in numbers in the line number designation register and the line counter are compared in a comparison circuit 3.4, and if they match, that is, the line number α or β corresponding to one line is reached, 1 is added to the line counter 7. Further, the number of rows in the row number designation register and the number of rows in the row count are also compared by the comparison circuit 4, and if they match, that is, when scanning of one screen is completed, the line counter 6 and the row counter 7 are cleared to zero. At this time, the line counter outputs a screen scanning end signal to the vertical synchronizing circuit 10, and returns to the scanning start point of the first 2-in. Clock generation circuit 81, horizontal synchronization circuit 9 and vertical r
e+ J4Ij circuit 10 performs inkstone at time lti.

Next, the condition C9 is a multiplication factor for configuring the horizontal synchronizing circuit 9 so that the one line scanning time is equal in the M rows and 1 column display and the N rows and 1 column display. The display mode switching circuit 11 causes the video generation circuit 12 to operate as follows. Dot patterns such as characters in videos are 2. The same is true for the group's display take. This video contains information between the lines. Character display f! , the number of lines between rows is 4 in the Ni row and 1 column, and during scanning, video 'lFf is outputted, and before the fifth line, video number 1d is output. Next, in the case of N rows and columns display, by taking the number of inter-row lines as 8 (if the conditions of Ij and Nakaj are satisfied, the video generation circuit 12 outputs the video signal for one row, and then finishes scanning the 8th line. Output the video clip.

As described above, the video generation circuit changes the timing at which the video signal is output for each number of displayed characters in the display mode switching circuit 11U, and adjusts the pitch between lines.

Therefore, the undisplayed area 1A can be approximately equally allocated between each line, and the entire screen can be used for display.

In addition, in this example, in order to approximately evenly allocate the undisplayed/black areas between each line, 4, ¥ is applied to the display device 1.
Special modifications (increases the number of browns that Brown always has)
Even if it is protected, the Ruhi-US production system can be used as is.

(6) Jiyamei's Mecha 7 Grudges and More Duds 1 Rui's Ceremony Indication Ceremony -A: By allocating the display area between each line, it is said that the waste on the cut 110 can be eliminated and the display can be more easily viewed. effective.

[Brief explanation of drawings]

Figure 1 shows the display capacity of two buildings in the conventional display 1lIIJ control system.
Figure 2 shows the material according to the present invention.
rrJIp; A diagram for explaining the Jj formula. FIG. 3 is a block diagram showing a display control method according to the present invention. Referring to the drawing, 1 is the line number designation register, 2 (is
14 is a control circuit, and 15 is a CRT.

Claims (1)

[Claims] A specification means for specifying at least the number of lines to be displayed on a screen, a display device capable of displaying display data for the specified number of lines, and adjusting an interval between displayed lines according to the specified number of lines. 1. A display control method, comprising: a control circuit, the display control method being characterized in that the interval in the row direction of display data is varied according to the number of rows data specified by a designation means.