JPH0830944B2 - Character generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a character generator that shortens the determination time of attribute information (decoration information) to speed up the processing.

[Conventional technology]

As a conventional character generator, for example, there is one provided with a judgment table for judging attribute information based on a character code (for example, JISC6226). The attribute modes include, for example, full-width characters, half-width characters, characters only for vertical writing, prohibited characters (start of line, non-start of line), external characters, etc., and a judgment table is prepared corresponding to these attribute modes. .

In this character generator, when a character code is input, the attribute information is judged based on the judgment result by sequentially checking each judgment table such as a judgment table for full-width characters, a judgment table for half-width characters, and so on. The modified character pattern is given to the printer to perform the printing operation.

[Problems to be solved by the invention]

However, according to the conventional character generator, since the individual judgment tables described above are sequentially checked to judge the attribute information, the number of times the reference of the judgment table increases and the judgment time becomes long. There is.

[Means for solving problems]

The present invention has been made in view of the above, and in order to shorten the determination time of attribute information and speed up the processing, a first memory stored with attribute information at an address determined according to a character code, A second memory that stores a character pattern according to a character code, an image handler that generates a modified character pattern by modifying the character pattern based on the attribute information, and an image in page units by inputting the modified character pattern A bitmap memory for storing information, and when the character code is input from the outside, the address is calculated, the attribute information is read from the first memory, and the second information is stored in the image Pandora according to the character code. Reading the character pattern read from the first memory from the first memory The following is intended to provide a character generator, characterized in that it comprises a control means for modified by the attribute information, describing the character generator of the present invention in detail.

〔Example〕

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

FIG. 2 shows the image signal generator 1, which includes an interface section 11 for receiving a character code from an external personal computer or the like according to the RS232C standard, a control section 12 for system control, a character pattern and a pixel pattern. A stored character pattern ROM 13, an image handler 14 that modifies a character pattern or pixel pattern based on attribute information, and a bitmap memory that stores the character pattern or pixel pattern modified by the image handler 14 in page units. 15, a memory controller 16 that controls the access timing to the bitmap memory 15, an interface unit 17 that outputs an image signal to the recording unit 2, and an output interface unit 18 that outputs a signal to the display panel 4. The control unit 12 controls a CPU 12a that controls various operations, a RAM 12b that temporarily stores data and calculation results in various operations, a RAM 12c that stores various programs and attribute tables, and inputs operation key signals in parallel. It has a parallel input / output circuit 12d that outputs signals in parallel to the display unit and a DMA controller 12e that controls access in data transfer between memories.

FIGS. 3A and 3B show the attribute table stored in the ROM 12c of the control unit 12. FIG. 3 (a) shows the attribute codes C ₀ , C ₁ , C ₂ ... C _n corresponding to each character code with the table base address TBA as the start address.
, And the attribute code C _n stored in the address TBA + _n is shown in FIG. The attribute code C _n has, for example, the following attribute information in the upper 4 bits A _{0 to} A ₃ .

A ₀ …… Full / half-width flag A ₁ …… Vertical writing exclusive flag A ₂ …… Kansai character flag A ₃ …… External character flag With the above configuration, the operation will be described as follows. When a character code is input to the interface unit 11 of the image signal generator 1 from an external personal computer or the like, the CPU 12a interprets the character code and the character pattern ROM13
To generate the corresponding character pattern. At the same time, set the address n determined by the character code to the table base address TB.
The attribute code C _n stored in the address TBA + n added to A is accessed and the content is checked. If the contents of A _{0 to} A ₃ are as follows, A ₀ ...... 1 A ₁ ...... 0 A ₂ ...... 0 A ₃ ...... 0 The CPU 12a controls the image handler 14 Pattern RO
The character pattern generated from M13 is modified into a double-byte character pattern and transferred to a predetermined address in the bitmap memory 15. The character codes sequentially input to the interface section 11 are subjected to such processing, and when an image of one page is transferred to the bitmap memory 15 by this processing, the image code is transferred to the recording section 2 via the interface section 17 by the access. The signal is output.

FIG. 4 shows the recording unit 2, 20 is a laser light source for emitting a laser beam 22, 21 and 25 are polarizers, 23 is a modulator having an image signal input terminal 24, 26 is a rotary polygon mirror, and 27 is f.
A θ lens, 28 is a photosensitive drum, 29 is a developing machine, and 30 is a transfer machine.

In the recording unit 2 having the above configuration, the input terminal of the modulator 23
When the image signal is input to the 24 from the interface unit 17,
The laser beam 22 emitted from the laser light source 20 is modulated according to the image signal. The laser beam 22 is subjected to scanning control by the rotary polygon mirror 26, and the photosensitive drum 28 is exposed through the fθ lens 27. The photoconductor drum 28 is charged before exposure, and an electrostatic latent image corresponding to the image in the bitmap memory 15 is formed on the photoconductor drum 28 by this exposure. This electrostatic latent image is developed with toner by the developing device 29 and transferred onto the recording paper 5 by the transfer device 30. Chart paper 5
The toner image of is fixed by a fixing device (not shown), and the recording of the image is completed.

〔The invention's effect〕

As described above, according to the character generator of the present invention,
Since the attribute information is determined by using the attribute table in which the attribute information is stored at the address corresponding to each character code, the attribute information determination time can be shortened and the processing speed can be increased.

[Brief description of drawings]

FIG. 1 is an explanatory view showing one embodiment of the present invention. Figure 2 shows the first
Explanatory drawing which shows the image signal generator in a figure. 3A and 3B are explanatory views showing an attribute table. FIG. 4 is an explanatory diagram showing a laser recording unit. Explanation of code 1 …… Image signal generator 2 …… Recording unit 11 …… Interface unit 12 …… Control unit 13 …… Character pattern ROM 14 …… Image handler 15 …… Bitmap memory 16 …… Memory controller 17, 18 ...... Interface section

Claims (1)

[Claims] 1. A first memory storing attribute information at an address determined according to a character code, and a second memory storing a character pattern corresponding to the character code.
Memory, an image handler that generates a modified character pattern that modifies the character pattern based on the attribute information, a bitmap memory that stores the modified character pattern and stores image information in page units, When a character code is input, the address is calculated, the attribute information is read from the first memory, and the character pattern read from the second memory according to the character code is read by the image handler. A character generator comprising a control means for modifying the attribute information read from the first memory.