JPS6327881A - Character generator - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a character generation device that achieves faster processing by shortening the time required to determine attribute information (modification information).

[Conventional technology]

Some conventional character generators include, for example, a determination table that determines attribute information based on a character code (for example, JISC6226). Attribute modes include, for example, full-width characters, half-width characters,
There is information such as the presence of characters only for vertical writing, prohibited characters (beginning of line, end of line), external characters, etc., and a judgment table is prepared corresponding to these attribute modes.

In this character generator, when you input a character code,
Judgment table for full-width characters, judgment table for half-width characters.
By sequentially checking each determination table such as ---, etc., attribute information is determined, and a character pattern modified based on the determination result is given to the printer to perform a printing operation.

[Problem that the invention seeks to solve]

However, with conventional character generators, attribute information is determined by sequentially checking the individual determination tables mentioned above, which increases the number of times the determination tables are referenced, which increases the time it takes to make a determination. There is this inconvenience.

[Means for solving problems]

The present invention has been made in view of the above, and in order to shorten the judgment time of attribute information and speed up processing, attribute information is stored in an address corresponding to each character code and an attribute table is used to perform attribute processing. The present invention provides a character generating device that makes judgments about information.

The character generator of the present invention will be explained in detail below.

〔Example〕

FIG. 1 shows an embodiment of the present invention, which includes an image signal generating device 1 (a network may be configured by a LAN) that outputs an image signal by inputting a character code from an external device such as a personal computer, and an image signal generating device 1 (a network may be configured by a LAN). A recording section 2 receives image signals, print commands, etc. from the signal generator 1 and prints them on the recording paper 5, and also provides a clock signal, a line synchronization signal, a status signal, etc. to the image signal generator 1, and the image signal generator 1 It also has a power supply circuit 3 for supplying power to the recording section 2 and the like, and a display panel 4 for operating the printer.

FIG. 2 shows the image signal generator 1, which receives a character code from an external personal computer, for example, R5232.
An image of an interface section 11 that receives data according to the C standard, a control section 12 that performs system control, a character pattern ROM 13 that stores character patterns and pixel patterns, and a pattern modification of character patterns and pixel patterns based on attribute information. A handler 14, a bitmap memory 15 that stores character patterns and pixel patterns pattern-modified by the image handler 14 in page units, a memory controller 16 that controls access timing to the bitmap memory 15, and a recording section 2. It has an interface section 17 that outputs an image signal to the display panel 4, and an output interface section 18 that outputs a signal to the display panel 4. The control unit 12 includes a CPU 12a that controls various operations.
, a RAM 12b that temporarily stores data and calculation results for various operations, a ROM 12c that stores various programs and attribute tables, and a parallel memory that inputs operation key signals in parallel and outputs signals to the display section in parallel. DMA that performs access control in data transfer between the input/output circuit 12d and memory
It has a controller 12c.

FIGS. 3(a) and 3([1) show an attribute table stored in the ROM 12c of the control unit 12.

Figure 3 (a) shows the attribute codes C0, C5, C2, etc. -c, --------- corresponding to each character code with the table base address TEA as the first address.
FIG. 3(D) shows an attribute table with
indicates the attribute code C1 stored at address TBA+H.

Attribute code cfi is the upper 4 bits A0 to A3
has, for example, the following attribute information.

Ao...-Full/Half-width flag A,...-111--Vertical writing only flag A2...-Illegal character flag A3...-User character flag In the above configuration, the operation is explained as follows. It is as follows. When a character code is input from an external personal computer or the like to the interface unit 11 of the image signal generating device 1, the CPU 12a reads the character code and generates a corresponding character pattern from the character pattern ROM 13. At the same time, the attribute code C7 stored at the address TBA+n, which is obtained by adding the address n determined by the character code to the table base address TBA, is accessed and its contents are checked. Here, if the contents of A0 to A are as follows, Ao-----・-I A,...-0 A2-...-0 A3--・-1-0 CPU12a controls the image handler 14 to modify the character pattern generated from the character pattern ROM 13 into a full-width character pattern and transfer it to a predetermined address in the bitmap memo January 5.

The character codes sequentially input to the interface section 11 are each subjected to such processing, and when one page's worth of image is transferred to the bitmap memory 15, the character code is transferred to the recording section 2 via the interface section 17 by accessing it. The image signal is output to.

FIG. 4 shows the recording unit 2, 20 is a laser light source that emits a laser beam 22, 21 and 25 are polarizers, 23
2 is a modulator having an image signal input terminal 24, 26 is a rotating polygon mirror, 27 is an fθ lens, 28 is a photosensitive drum, 29 is a developing device, and 30 is a transfer device.

In the recording section 2 having the above configuration, when an image signal is input from the interface section 17 to the input terminal 24 of the modulator 23, a laser beam 2 is emitted from the laser light source 20.
2 is modulated according to the image signal. This laser beam 22 is scanned by a rotating polygon mirror 26 and controlled by f
The photosensitive drum 28 is exposed through the θ lens 27. The photoreceptor drum 28 is charged before exposure, and by this exposure an electrostatic latent image corresponding to the image in the bitmap memory is formed on the photoreceptor drum 28. This electrostatic latent image is developed with toner by the developing stage 29 and transferred onto the recording paper 5 by the transfer device 30. The toner image on the recording paper 5 is fixed by a fixing device (not shown), and recording of the image is completed.

〔Effect of the invention〕

As explained above, according to the character generation device of the present invention, attribute information is determined using an attribute table that stores attribute information in addresses corresponding to each character code, so that the time required to determine attribute information is reduced. By shortening the length, processing speed can be increased.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. FIG. 2 is an explanatory diagram showing the image signal generation device in FIG. 1. FIGS. 3(a) and 3(rl) are explanatory diagrams showing attribute tables. FIG. 4 is an explanatory diagram showing a laser recording section. Explanation of symbols - Image signal generator 2 -- Recording section 11 -- Interface section 12 -- Control section 13 -- Character pattern ROM 14 -- ---・
・Image handler 15--Bitmap memory 16--Memory controller 17.18--Interface section C in Figure 3

Claims (1)

[Scope of Claims] In a character generating device that generates a character pattern modified according to attribute information based on a character pattern corresponding to a character code, attribute information corresponding to the character code is sent to an address corresponding to the character code. A character generating device comprising: a storage means for storing the character code; and a control means for modifying a character pattern corresponding to the character code based on the attribute information stored at the address.