JPS6339064B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dot pattern generation circuit that converts character codes into predetermined dot patterns, and more particularly to a dot pattern generation circuit that synthesizes and outputs character and graphic dot patterns.

Conventionally, this type of dot pattern generation circuit has, for example, a printing device equipped with a character generator that generates dot patterns corresponding to character and graphic elements, and the dot patterns corresponding to the character and graphic elements are sequentially generated according to input codes. It was generating a dot pattern. Therefore, when printing a message, etc., if horizontal lines, which are a type of figure, are printed in addition to characters,
The printing device prints the characters and the horizontal line elements at different times, or has a printing buffer, so that the dot patterns of the characters and the horizontal line elements are superimposed by the printing buffer and printed at the same time. This has resulted in disadvantages such as a decrease in the printing speed of the printing device and an increase in costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dot pattern generation circuit that can improve a graphic dot pattern generation circuit, reduce the number of graphic codes occupied in the code, and prevent a decrease in the generation speed of a composite pattern of figures and characters. be.

According to the present invention, there is a detector that detects a code that specifies a change in a figure added to a character code, and a code that specifies a change in the next figure in a predetermined tod pattern is inputted by a signal from this detector. a character dot pattern generator that converts the character code into a predetermined dot pattern; and a composite pattern is created from the output of the graphic dot pattern generator and the output of the character dot pattern generator. A dot pattern generation circuit consisting of an OR circuit is obtained.

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, a first embodiment of the present invention includes a dot pattern generation circuit 50 that supplies a dot pattern to a printing mechanism section 26 of a printing device 20, and a control device 10 that controls the printing device 20.

The control device 10 generates a code string 30 having, for example, one row of codes. This code string 3
0 is a code 31 that specifies the start of a horizontal line, a parameter code 32 that specifies a horizontal line, and a character code 3 for one line.
It has 3. The buffer 21 can temporarily store the code string 30. The detector 22 detects code 3 of the code string 30 sent out from the buffer 21.
1 and the parameter code 32 are detected and sent to the register 24 according to the contents of the parameter code 32. The register 24 has the same number of bits as the number of dots determined in the vertical direction of one line, and is a means for storing the printing device of horizontal lines. The character generator 23 generates the character code 33 from the buffer 21 as a predetermined dot pattern. The OR circuit 25 logically ORs the dot pattern from the character generator 23 and the horizontal line pattern from the register 24, and sends the result to the printing mechanism section 26.

Next, the operation will be described. The code string 30 sent from the control device 10 is once input into the buffer 21 on the printing device 20 side, which stores codes for a maximum of one line. When the detector 22 detects the code 31 specifying the start of a horizontal line, the detector 22 registers the register 24 with the same number of bits as the number of dots defined in the vertical direction of one line, according to the contents of the parameter code 32 following the code 31. stores the printing position of the horizontal line. The detector 22 does not act on the character code 33 and sends the code 33 to the character generator 23, which generates a predetermined dot pattern. The character pattern output of the character generator 23 and the horizontal line pattern output of the register 24 are ORed by the OR circuit 25 to form a dot pattern row 4.
0 is output, and the printing mechanism unit 26 simultaneously prints characters and horizontal lines. By inserting a code 31 specifying the start of a horizontal line and a parameter code 32 in the middle of a character code 33, the position of the horizontal line can be changed in the middle of one line.

Furthermore, if the register 24 is changed to a counter that allows parallel input, it is possible to print not only horizontal lines but also diagonal lines.

In the second embodiment of the present invention, only one horizontal line is printed per line, and in this case, as shown in FIG. 2, the code string 30 input to the printing device 20 includes only a code 31 specifying horizontal line printing and parameter sign 32
becomes unnecessary. Also, the dot pattern generation circuit 5
0', register 2 shown in the first embodiment
4 is replaced with a flip-flop 27. The position of the horizontal line can be changed by changing the input terminal of the OR circuit 25.

As explained above, the present invention adds a code necessary for outputting a graphic dot pattern to a character code to create a code that specifies only the change in the figure, and increases the proportion of the graphic code included in the character code input to the dot pattern generation circuit. This has the effect of generating a composite pattern of figures and intersections at high speed with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing another embodiment. DESCRIPTION OF SYMBOLS 10... Control device for printing device, 20... Printing device, 21... Buffer, 22... Detector, 23...
...Character generator, 24...Register,
25...OR circuit, 26...printing mechanism section, 27...
...Flip-flop, 30... Input code string to printing device, 31... Code specifying the start of horizontal line, 3
2...Parameter code, 33...Character code, 40
. . . dot pattern row, 43 . . . dot pattern obtained by ORing the dot pattern of one character and the horizontal line dot pattern, 50, 50' . . . dot pattern generation circuit.

Claims (1)

[Claims] 1. A detector that detects a code that specifies the start position and shape of graphic dot pattern printing added to a character code, and a predetermined graphic dot pattern specified by a signal from this detector that specifies the next graphic change. a graphic dot pattern generator that generates until a code is input; a character dot pattern generator that converts the character code into a predetermined dot pattern; an output of the graphic dot pattern generator; and an output of the character dot pattern generator. and means for creating a composite dot pattern.