JPS59182494A - Pattern generation 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] The present invention relates to a pattern generation method for a display device used as an input/output device of an electronic computer, and more specifically, a pattern generation method for a display device used as an input/output device of an electronic computer, and more specifically, a method for generating a pattern for a display device such as a raster scan type display device that displays characters and character frames. This is related to the pattern generation method for the straight lines that make up the line.As shown in Figure 1, to display a character frame surrounding a character or character string, use upper line 4 and under line 1.
2. The purpose can be achieved by displaying the vertical line t. FIG. 2 is a general configuration diagram of a display device for displaying characters and character frames as shown in FIG. In Figure 2, (1) is a memory that stores codes for characters and character frames to be displayed on the screen;
2) follows the character code output from memory (1),
(3) is a pattern generator that generates character frames according to the character frame code output from memory (1).
, (4) is a mixer that mixes the output of the character generator (2) and the output of the pattern generator (3) to create a display signal. The character code output from the memory (1) is converted into a character display signal by a character generator (2), and the character frame code is converted into a character frame display signal by a pattern generator (3). The character and character frame display signals are mixed in a mixer (4),
Output.

First, an example of the configuration of a conventional pattern generator V-tor (3) is shown in FIG. In Figure 6, (5) is memory (1)
The upper line code, which is supplied from the upper line code, generates the upper line display signal.
(6) is an under line generator that generates an under line display signal based on the under line code supplied from memory (1), and (7) is an under line generator that generates an under line display signal based on the under line code supplied from memory (1). This is a vertical line generator that generates a vertical line display signal based on the vertical line code. -t, (8) is a pattern mixer that mixes the display signals output from each of the generators (5), (6), and (7).

Next, the operation will be explained. When the upper line code is input to the upper line generator (5), a display signal is generated only on the uppermost raster of the character position (-1 does not occur on other rasters) as shown in the timing diagram of Figure 4 (a). .Similarly, the underline code
When input to the line generator (6), as shown in Figure 4 (
As shown in the timing diagram b), a display signal is generated only at the bottom raster of character positions.

Also, when a vertical line code is input into the vertical line generator,
As shown in the timing diagram of FIG. 4(C), a display signal for one dot is generated in all rasters of character positions. By mixing these six types of signals in a pattern mixer (8), a display signal for the p character frame is created. However, in this method, in order to handle display signals with narrow pulse widths, a character generator (2 ), it is necessary to prevent a time lag in the display signal, which has the disadvantage of complicating the circuit.

This invention was made to eliminate the above-mentioned drawbacks of the conventional ones, and it combines a pattern generator with a dot generator that has as many horizontal outputs as the number of horizontal dots within one character range, and a shift generator. By configuring it with registers, it provides a pattern generation method with a simple circuit configuration.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 5 is a block diagram of a pattern generator (3) in one embodiment of the present invention. In Figure 5, (9)
is a dot generator that has the number of outputs equal to the number of horizontal dots for one character from the upper line, under line, and vertical line codes supplied from the memory (1 line).
Q is a shift register that converts the output of the dot generator (9) into a display signal.

Here, in order to simplify the explanation, it is assumed that one character has five dots in the horizontal direction.

Now, when the upper line code is input to the dot generator (9), it will change from (e) to (
Each output line in 1) becomes significant, and when the underline code is input to the dot generator (9), each output line from (e) to (i) becomes significant when the bottom raster is displayed. Therefore, when a vertical line code is input, only the output (g) becomes significant in all raster displays. FIG. 6 shows a timing diagram of outputs from (G) to (1) when displaying a character frame as shown in FIG. 1. The pulse width of the output signal is at least one character display time.

Next, the output of the dot generator (9) is transferred to the shift register (10 (e), (f), (g), (h)).
- Convert (i) into an instant serial signal. This signal becomes a display signal for the straight lines forming the character frame.

In the above embodiment, the number of dots in the horizontal direction of one character is 5, but it goes without saying that the present invention is not affected by the number of dots.

Furthermore, the occurrence pattern is upper line, under line,
Although the case of only lines and vertical lines has been described, it goes without saying that other patterns such as a central horizontal line can have similar effects.

As described above, according to the present invention, a dot generator is provided which outputs a linear signal constituting a character frame etc. as many times as the number of horizontal dots in the display section of one character, and the output of this dot generator is shifted.・Since it is converted to a display signal by a register, the signal has a wide pulse width in units of one character at the shift register, and the signal has a narrow pulse width in units of one dot at the output of the shift register, so the circuit There is no need to pay attention to the delay time, and it can be configured with a simple circuit and has excellent effects.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing an example of displaying characters and character frames;
FIG. 6 is a configuration diagram showing a conventional display device, FIG. 6 is a configuration diagram showing a conventional pattern generator, FIG. 4 is a timing diagram of a conventional pattern generator, and FIG. 5 is a pattern diagram according to an embodiment of the present invention.・The configuration diagram of the generator, and FIG. 6 is a timing diagram of the pattern generator according to the present invention. In the figure, (1) is the memory, (2) is the character generator, (3) is the pattern generator, (
4) is a mixer, (5) is an upper line generator, (6) is an under line geometer, (
7) is a vertical line generator, (8) is a pattern mixer, (
9) is a dot generator, and oO is a shift register. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 No. 1 Figure 2 Figure 3 a t) (T: Company) -111111--Ro--Ro-Ro Figure 5 Figure 6 e f g h i

Claims (1)

[Claims] In a pattern generation method for displaying straight lines constituting character frames, etc. on character display devices used in computer input/output devices, etc., dots with the number of outputs equal to the number of horizontal dots in the display section of one character. - A pattern generation method characterized in that a generator is provided, the dot generator generates an output corresponding to the type of straight line, and this output is converted into a display signal by a shift register.