JPH047635A - Crt display device - Google Patents

Abstract

PURPOSE:To distinguish information by a color by providing an input part to input what color information in a displaying color look-up table is to be rewritten into the contents of a printing color look-up table. CONSTITUTION:When color printing is executed, first of all, the displaying color look-up table 14 is referred to, and the color information on a CRT monitor 15 is sent to a color printer 18 together with picture data. Before this picture data is outputted to the printer 18, the printing color look-up table 17 is referred to, and when it is decided that the color information needs to be rewritten, the value of the printing color look-up table 17 is substituted for the color information of designated color number. If the value of the table is set beforehand to be a desired color, the picture data can be printed and outputted in a printing color independent of CRT display. Thus, the information can be distinguished by the color from a printed result as well.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention is capable of color display and is capable of controlling the screen.

(Prior Art) Usually, a color CRT display device has a display memory called a frame memory 3, as shown in FIG. Graphics are displayed by storing color data for each image in this memory. However, these color data in the frame memory 3 are the display color data, which indicates the storage address of a memory called the display color lookup table 4, which stores the brightness of the three primary colors of red, green, and blue. For example, if the brightness of red, green, and blue represented by lookup table 4 changes in 256 ways, 256×256
With X 256, a total of 16777216 colors can be combined. Among these, the colors to be simultaneously displayed are determined by how many frames the frame memory is made up of; for example, if there are 8 frames, 256 colors can be displayed simultaneously. The printer control unit 6 associated with such a color CRT display device refers to the above-mentioned display color lookup table 4 when setting the color to be printed. It is assumed that this display color lookup table 4 stores color information for 256 colors at addresses indicated by color numbers. When printing with less than 256 colors of the color printer 8 by referring only to this table 4, color adjustment in printing is required. This adjustment applies 256 color information to the print color, but normally, if the corresponding color information in Table 4 includes color information for each of red, green, and blue, regardless of the intensity of brightness, then This is achieved by outputting to the color printer 8.

(Problem to be Solved by the Invention) By the way, assuming that the intensity of brightness is expressed as 0 to 255, the color information of a certain color number is stored in the display color lookup table 4 in the order of red, green, and blue (128, 128 128), the CRT monitor 5 displays gray, but the color print displays white, making it indistinguishable from the original white (255, 255, 255).

In other words, images that are different colors on the CRT display end up being the same color on the print. In systems that use CRT display devices for monitoring purposes, information is often distinguished by color, and if images that are different colors on the CRT monitor 5 end up being the same color when printed, they may become useless as data. This is because printing is performed by referring only to the display color lookup table 4. As described above, in the conventional method, depending on the setting of the color information in the display color lookup table 4, there is a large sense of incongruity between the CRT display color and the print result, resulting in a result that does not meet the operator's wishes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a CRT display device in which the CRT display colors and the colors printed thereon give less sense of discomfort to the operator, and in which information can be distinguished by color.

[Structure of the invention]

(Means for Solving the IA Problem) In order to achieve the above object, the present invention provides a frame memory for holding image information, and a red/green display on a CRT monitor corresponding to the color display data on this frame memory. - A display color lookup table that provides color information on the brightness of blue, a color printer that takes a hard copy of the image output on a CRT monitor, and a color printer that converts the color information in the display color lookup table to print. A CRT display device comprising: a color lookup table for printing; and an input section for inputting which color information in the color lookup table for display is to be rewritten with the contents of the color lookup table for printing. I will provide a.

(Function) In an apparatus configured as described above, when color printing is executed, the display color lookup table is first referred to as in the conventional case, and the color information on the CRT monitor is sent to the color printer together with the image data. It will be done. This sent color information includes colors other than those that can be printed by the printer. Before this image data is output to the printer, the color lookup table for printing is referred to, and if it is determined that the color information needs to be rewritten, the color information of the specified color number is changed to the color lookup table for printing. Converted using the uptable value.

If you set the values in this table to the desired color in advance, C
It becomes possible to print out in a print color independent of the RT display.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and numeral 11 shows the entire CRT display device. Reference numeral 12 denotes a CRT main control unit which performs main control of CRT display. Reference numeral 13 denotes a frame memory in which image data is stored. In this embodiment, this table is referred to when drawing data. ]Convert 5\Send to printer. 17 is a newly added color lookup table for printing, which is the main feature of this invention. 18 is a color printer, and 19 is an input unit for setting a color lookup table for printing, which corresponds to, for example, setting using a keyboard.

FIG. 2 shows a procedure for setting newly corrected color information for printing, which is executed by the printer control unit 16.

Figure 3 is a color lookup table for printing 17t
In the figure shown in c-, there are three sets of red, green, and blue, similar to the display color lookup table 4 of FIG. However, the difference is that the initial value of this table is set to -1.

Next, the operation of the embodiment will be explained. First, before printing, the color lookup table 17 for printing is prepared in advance.
Print color information must be set in advance. In FIG. 3, by specifying a color number from the input section 19 to the print color lookup table 17, it is determined how to set each of the red, green, and blue tables. At this time, in this embodiment, the color brightness is set to 255 to specify the color components that are desired to be output during printing, and 0 is set to those that are not desired to be printed. In other words, the value of the print color lookup table 7 is -1°0.255
Only the three values are taken, reducing the complexity of processing.

Next, when the image displayed on the CRT monitor 15 in FIG. Sent out. When the printer control unit 16 learns that the image data has arrived, it immediately searches the printing color lookup table 17.

The search procedure will be explained with reference to the flowchart in FIG. First, the color information of red, green, and blue is read in descending order of color number (FIG. 2, 21 and 22).Next, the value of the color information is determined (FIG. 2, 23).

If it shows -1, pass that number and proceed to the next (
Figure 2 26). For example, in the display color lookup table 4 in FIG. 4, the color brightness is (255, O, O).
Since color number 2 indicates -1 in the printing color lookup table 17, it is not changed.

When the color information is other than 11, for example, in the display color lookup table 4 in FIG. 4, the color brightness is (255, 0
, 23) is set by the input unit 19 as (255, 0, 0) in the printing color lookup table 17, this color information (
255, O, O) from the printing color lookup table 17 (Fig. 2 24), and rewrites the color indicated by color number 204 in the image data with this value (Fig. 2 25). After performing this operation up to color number 255 and rewriting everything with the searched color information, the printer control unit 16 sends the image data to the printer 18 (FIG. 2, 27).As a result of printing, the color with color number 204 is The color is red and is no longer a composite color of red and blue printed using the conventional method.

According to this embodiment, since the printing color can be arbitrarily selected independently of the display color of the CRT monitor, printing can be performed according to the operator's wishes.

〔Effect of the invention〕

According to the present invention, there is no large difference between the display colors of the CRT monitor and the print colors, and information can be distinguished from the print results by color, thereby improving the effectiveness of the data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the overall configuration of an embodiment of a CRT display device according to the present invention, FIG. 2 is a flowchart showing means for carrying out the present invention, and FIG. Fig. 4 is a block diagram of a color look-up table for display that has been used conventionally. 5...CRT display device body, 5...Frame memory, /4 4...Display color lookup table, 5...
CRT monitor, /7 $...color lookup table for printing, /S length...color printer, /9 5...input section. Agent Patent Attorney Noriyuki Chika

Claims (1)

[Claims] A frame memory that holds image information, a display color look-up table that provides brightness color information of red, green, and blue to a CRT monitor corresponding to the color display data on this frame memory, and a display color lookup table that provides color information of brightness of red, green, and blue to a CRT monitor, and A color printer that takes a hard copy of an image; a print color lookup table that converts the color information in the display color lookup table to print; and a color printer that converts any of the color information in the display color lookup table. 1. A CRT display device comprising: an input section for inputting whether to rewrite the contents of a color lookup table for printing.