JPS60235234A - Print control system of printer - Google Patents

Abstract

PURPOSE:To classify colors of color graphics with a monochromatic dot printer by changing the density of dots printed in an area to change the brightness when this area is shaded and allowing this brightness to correspond to a color. CONSTITUTION:When a shading command is detected by a graphic command analyzing part 1, address information is transmitted to an address control circuit 6, and color discrimination information is inputted to inputs IN0-IN2 of counters 7 and 8. Counters 7 and 8 control thinning intervals of dots in longitudinal and transverse directions. Longitudinal and transverse thinning interval control signals are inputted to an AND circuit 9, and address information of a print buffer outputted from the address control circuit 6 and on/off information of dots in print buffer address positions are transferred to a print buffer control part 4. Thus, the dot density of the monochromatic printer is varied in accordance with color information designated by shading of the graphic command.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a color graph ink system, and particularly to a pseudo-coloring method suitable for a fluorescent dot printer.

[Background of the invention]

Conventionally, when outputting the display of a color graphic display using a single-color dot printer, the area where the color was filled in (shading area) was printed with the same brightness because the bit in the output buffer was on. However, since the display, which was differentiated by color, was output with the same brightness, the program had to call up a different print pattern to distinguish between areas, resulting in poor operability. .

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pseudo-colorization method that enables information displayed on a color graphic display in areas differentiated by color to be identified even on a single-color dot printer.

[Summary of the invention]

Each color has its own brightness, and humans can distinguish between the differences in brightness. Focusing on this point, in a dot printer device, when shading an area, it is possible to change the brightness by changing the density of dots printed within that area. From which point of view, this is a printing control method for a printer that makes it possible to distinguish between colors in an area by incorporating a mechanism that automatically changes dot density for each color into a single-color dot printer.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of a graph ink control section in a printer control device. (2) is a graphic command analysis unit that analyzes the transferred graphic command and creates a dot image to be developed in the print buffer (5). Reference numeral 2 is a print buffer development unit for developing the graph ink command converted into an image in step 1 into a print buffer. Reference numeral 4 denotes a print buffer 7 control unit for associating graphic dot images with physical addresses of the 5° print buffer. The pseudo coloring addition mechanism of No. 3 will be explained using FIGS. 2 and 3. When a shading command is detected by the graphic command analysis section 1, address information of the shading area is transmitted to the address control circuit 6. Further, the color identification information is input to the input I No-I N2 of the counters 7 and 8. Counter 7 controls the horizontal dot thinning interval of print buffer 11. 80 counter is
Controls the vertical dot thinning interval of the print buffer. The counter generates an output signal corresponding to the thinning period. The AND circuit of 9 calculates the logical product of the vertical and horizontal control signals for the dot thinning interval of the print buffer by the 7 and 80 counters. By passing the address information of the print buffer output from the address control circuit 6 and the on/off information of the dot at the print buffer address position to the print buffer control section 4, the color information specified by the shading of the graphic command is applied. Correspondingly, areas can be distinguished by changing the dot density output by a single-color dot printer. The thinning interval of dots on the print buffer for specific color information will be explained in detail with reference to FIG.

Reference numeral 10 indicates the information form of color information for the area specified by the shading command. R2O and B in the figure represent the three color elements, R (red) and G (green).

Indicates B (blue), and 1 and 0 indicate whether or not to include the color. Region a is a mixture of G and B colors, and the dot thinning interval 5 is obtained from this information.

This obtained value of 5 is input to the counter section of 7 and 8, ~
Input to IN2. The print buffer 7 control section turns on the bit every time the print buffer address increases by 5 from the 5-cycle output signal output from the counter section 7.8.

Area a of the print buffer has the contents when actually formed under this control. Similarly, the area is the content of the print buffer when dots are turned on at three intervals in each of the vertical and horizontal directions of the print buffer address due to the coexistence of R and B colors. A single dot printer prints one dot when this print buffer bit is on.

Therefore, by printing the contents of the print buffer formed using this control method using a dot printer, it is possible to distinguish between different color blocks and shading areas.

〔Effect of the invention〕

According to the present invention, even when a business graph or the like displayed in specified colors on a color graphic display is output using a single-color dot printer, the density of dots within the area can be reduced by thinning out the dots for each color. Since it can be changed automatically, it is effective for printing color graphics.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a graphic control unit of a printer control device for realizing pseudo coloring according to an embodiment of the present invention, and FIG. 2 is a detailed circuit diagram of the pseudo coloring addition mechanism shown in FIG. 1. 3A and 3B are display diagrams showing the output format when a color is specified for each area using the pseudo color addition mechanism. DESCRIPTION OF SYMBOLS 1... Graphic command analysis part 2... Print buffer development part 3... Approximate colorization addition mechanism 4... Print buffer control part 5... Print buffer, 6... Address control part 7...
・Counter, 8...Counter 9...AND circuit,
10... Area-based color specification information 11... Print buffer. Representative Patent Attorney Akio Takahashi Figure 1') t'2 Force 3rd (0-)

Claims (1)

[Claims] 1. In a single-color printer device that has a graphic mechanism and a dot printing mechanism, when a color shading command is expanded to the print buffer, the dots are thinned out for each color and the gradation is created based on the dot density. By providing an additional mechanism, graphs etc. that are actually colored and expressed on a color graphic display,
A printing control method for a printer characterized by making it possible to differentiate between colors without changing data transferred to a printer device.