JPH03145694A - Character pattern size converting system - Google Patents

Abstract

PURPOSE:To obtain a character pattern of an arbitrary character size by inputting directly of a character pattern of (m) X (m) dots to a read-only memory having data for changing a character pattern size, and changing it to a character pattern of (p) X (q) dots. CONSTITUTION:A character pattern of (m) dots generated successively by a one-line portion each from a first read-on memory 20 is converted to a character pattern of (q) dots by inputting it directly to a second read-only memory 30 and stored in a random access memory 50, and converted to a character pattern of vertical (m) and horizontal (q) dots by executing it by an (m)-line portion. Also, the character pattern stored in the random access memory 50 is converted to a character pattern of (p) dots by inputting it successively (m) dots each in the vertical direction to a second read-only memory 30 and stores in the random access memory 50, and brought to size conversion to a character pattern of (p) X (q) dots by executing it by a (p)-dot portion. In such a way, the character pattern of an arbitrary character size is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for generating a character pattern corresponding to a character code when the code is input.
From m×m (m is a positive integer) dot size, pXq (p
, q is a positive integer) This invention relates to a character pattern size conversion method for generating a character pattern converted to a dot size.

Conventional technology Conventionally, this type of character pattern size conversion method has a character pattern that corresponds to all character codes in a read-only memory for each size, and the character pattern corresponding to the character code and character size is stored. The method used was to input the specified address into the read-only memory to generate a character pattern of the desired size.

Problems to be Solved by the Invention However, the conventional character pattern generation method described above has the following problems:
Since the read-only memory must contain character patterns that correspond to all character codes and character sizes, the disadvantage is that the capacity of the read-only memory increases in proportion to the type of character size supported.

The present invention has been made in view of the above-mentioned conventional situation,
Therefore, an object of the present invention is to provide a novel character pattern size conversion method that makes it possible to eliminate the above-mentioned drawbacks inherent in the conventional technology.

Means for Solving the Problems In order to achieve the above object, the character pattern size conversion method according to the present invention includes a first read-only memory for generating a character pattern of m×m dots, and a pattern size conversion method. a second read-only memory having data for conversion;
It has a latch circuit that latches the output of the second read-only memory, a random access memory that stores the size-converted character pattern, and a controller. By directly inputting the m-dot character pattern generated in minutes into the second read-only memory as an address, it is converted into a q-dot character pattern and stored in the random access memory, and this is stored in the random access memory for m lines. By doing, length m,
Convert the character pattern into a character pattern of q dots horizontally, and input the character pattern stored in the random access memory into the second read-only memory sequentially m dots at a time in the vertical direction.
It is characterized in that it is converted into a character pattern of dots and stored in a random access memory, and by performing this for q columns, the size is converted to a character pattern of p×q dots.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

Referring to FIG. 1, the controller 10 includes a memory glia 16
After clearing the random access memory 50, the ROM address 11 where the character pattern corresponding to the character code 1 is stored is set, and at the same time, the horizontal conversion size q is set to the conversion size 17. When the address is set, the first read-only memory 20 sets m dots of character data on the first line to the RO 141 output 21. The second read-only memory 30 converts this character pattern data into n dots and stores the result in the ROM 2.
Set to output 31. At this time, the controller 10 activates the write signal 13 and the latch signal 12, so that the data after the size exchange is latched by the latch circuit 40, and the size conversion result of the first line is transferred to the random access memory 50 through the latch data 41. The data is stored at the address indicated by the RAM address 15 set by the controller 10.

From the second line onwards, similar processing is performed on the character pattern data sequentially output from the first read-only memory 20, and as a result, the random access memory 50 stores the vertical m
, the character pattern converted to horizontal q dots is stored.

Next, the controller 10 activates the read signal 14 and sets the RAM address 15 where the character pattern of the first column is stored, and at the same time sets the vertical conversion size p to the conversion size 17. Thereafter, the vertical direction is also converted in the same way as the above-mentioned horizontal direction conversion, and as a result, a character pattern whose size has been converted to p×q dots is stored in the random access memory 50.

FIGS. 2(a) to 2(e) are diagrams showing an example of data when converting from 12 dots to 8 dots as the input/output relationship of the second read-only memory 30.

Referring to FIG. 2, taking (a) as an example, data 11 is stored at address 0CI(H) of the second read-only memory 30.
(H) is stored, so that the character pattern output from the first read-only memory 20 or the random access memory 50 is directly transmitted to the second read-only memory 3.
Just by inputting 0, you can get the size-converted character pattern.

Figure 3 shows a 24x24 dot character pattern written at 16x
It is a diagram showing the process of converting a 16-dot character pattern into Kanpa.

As described in detail, according to the present invention, the second glue-only memory containing data for converting the character pattern size,
By directly inputting a character pattern of m x m dots and converting it to a character pattern of p x q dots, you can simply have one type of character size pattern that corresponds to all character codes in read-only memory. , the effect is that a character pattern of any character size can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
Figures (a) to (e) are diagrams showing an example of the input/output relationship of the second read-only memory containing data for character pattern size conversion, when converting from 12 dots to 8 dots. is a diagram showing a conversion example of the present invention, taking as an example a case where a character pattern of 16×16 dots is obtained from a character pattern “Kan” composed of 24×24 dots.

Claims (1)

[Claims] A first read-only memory for generating a character pattern of m×m (m is a positive integer) dots, a second read-only memory having data for pattern size conversion, and this second read-only memory. It has a latch circuit that latches the output of the memory, a random access memory that stores the character pattern whose size has been converted, and a controller, and has m dots that are sequentially generated one line at a time from the first read-only memory. By inputting the character pattern directly into the second read-only memory as an address, it is converted into a character pattern of q (q is a positive integer) dots and stored in the random access memory, and this is performed for m lines. By converting the character pattern into a character pattern of m dots vertically and q dots horizontally, the character pattern stored in the random access memory is input into the second read-only memory sequentially m dots at a time in the vertical direction, and p (p is a positive integer) A character pattern characterized in that the size is converted to a character pattern of p×q dots by converting it into a character pattern of dots, storing it in the random access memory, and performing this for q columns. Size conversion method.