JPS6271991A - Display unit - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is a display for monochrome display by converting all definitions of color specification into color specification data already determined in data to be displayed in color on a CRT display, etc. It is related to the device.

BACKGROUND OF THE INVENTION FIG. 3 shows the structure of a display control section of a display device when a conventional CRT display is used, and FIG. 4 shows the structure of display data and attribute data of the same device. In FIG. 3, reference numeral 1 indicates a display data memory in which display data is stored, and reference numeral 2 indicates an attribute data memory in which attribute data specifying the color, etc. of the display data is stored.

3 is a display control circuit that controls reading data from the memory in accordance with the display time and generates horizontal and vertical synchronization signals for the CRT display device; 4 is a buffer circuit for horizontal and vertical synchronization signals; and 6 is a display control circuit that reads display data on the screen. A character generator circuit for converting into a character font to be displayed is connected to a shift register 6, and character font data of parallel data outputted from the character generator circuit 5 is converted into a video signal of a serial pulse train. 7 is an attribute register that temporarily holds attribute data; 8 is a color video signal generation circuit that outputs red R1, green G, and A blue B color video signal is generated. 9 is a color CRT display device. Reference numeral 10 denotes a gradation signal generation circuit that generates gradation signals in correspondence with color signals to be displayed on a monochrome CRT display. 11 is a monochrome CRT display device.

FIG. 4a shows an example of display data, and FIG. 4 shows an example of attribute data. The attributes indicate the colors of the display data shown in FIG. 4a, and include three primary colors for the foreground, a designation 1 for displaying highlighted characters to be highlighted, and three primary color instructions for the background. This attribute data has a one-to-one correspondence with display character data.

Problems to be Solved by the Invention However, when receiving software for displaying using the display data of the conventional CRT display device,
When used in flat panel display devices such as plasma and liquid crystal display devices, which have become popular in recent years to reduce size and weight, a problem has arisen in that the software cannot be used because color display cannot be performed.

In this way, the present invention enables software created based on the conventional CRT display display system to be used even under a new display element such as the apparatus of the present invention.

Means for Solving the Problems In order to achieve the above object, the present invention specifies the colors to be displayed on a display device using a flat display element etc. that cannot display colors.a) Foreground and background of IJ butte data It is equipped with a rule for converting the ground color combination according to the brightness of the color, a circuit for realizing this, and a circuit for changing the rule.

Therefore, according to the present invention, by converting the color specification attribute data of ready-made color display software, it is possible to display on a monochrome display screen in correspondence with color display, which is different from conventional color display software. This has the effect that color display software can be used without any changes.

EXAMPLE The present invention will be described below with reference to FIGS. 1 and 2, which show an example thereof.

FIG. 2 shows rules for color conversion according to an embodiment of the present invention, and FIG. 1 shows the configuration of a display device according to an embodiment of the present invention.

In FIG. 1, 1 is a display data memory, 2 is an attribute memory, 3 is a display control circuit, 4 is a buffer circuit, 5 is a character generator circuit, 6 is a shift register, 7 is an attribute register, and 7a is an attribute data conversion circuit, 8a is a video signal generation circuit;
12 is an attribute conversion setting circuit, and 13 is a display device using a plasma display or a liquid crystal display.

In the above embodiment, as shown in FIG. 2, the color display of the screen specified by the foreground color and background color of the attribute data is changed by considering all the combinations of foreground and background. The display is converted accordingly. In the example of FIG. 2, in the highlighted character display specified by AT3I, the bold font character display is switched from the normal font display. If the foreground and background colors are the same, the display is converted to non-display because the characters cannot be seen if the characters displayed on the screen and the background color are the same, even in the case of color display.

However, only when the foreground color is white (R, G, B=1.1°1) and the background color is also white, the display is converted to full dot display F. Also, the foreground color is black (RlG,
B: When o, o, o), the image on the screen in which the displayed characters are displayed in black is converted to reverse display R. Also, from the point of view of the same image, when the bank ground color is white, all reverse display H is performed. All other characters are displayed normally, regardless of the foreground and background colors. By converting in this way, each image can be displayed on the screen in monochrome display instead of the color display screen of the main body. Furthermore, even with these conversion methods, if a problem occurs with the use of color display with ready-made software, it can be solved by simply changing the conversion method. For example, with ready-made software, when the brightness of the foreground color on the screen is lower than the brightness of the background color, that is, the foreground color is blue (R, G, B = 0.
0.1) and the background color is yellow (RoG, B=
1.1. o) In the case of (7), the color gradation level of the yellow background is higher than that of the blue color of the foreground. In such a case, reverse display improves the display image on the screen.

Circuits that perform such conversion are an attribute data conversion circuit 7a and an attribute conversion setting circuit 12 shown in FIG. That is, under the control of the display control circuit 3, the attribute data conversion circuit 7a reads out attribute data for specifying colors in accordance with the display timing from the attribute data memory 2 and stores it in the attribute register 7. , the content is determined and the conversion is performed in accordance with the above-mentioned attribute data conversion rules. As a result, the attribute data conversion circuit 7a creates a signal REV for reverse display, a signal for non-display (NonDISP), a signal for displaying all dots (FUI, L), and a bold font switching signal 1 instead of highlighted display. Video signal generation circuit 8
a and the character generator circuit 5. This causes the character generator circuit 5 to switch to the bold font. Further, the video signal generation circuit 8a controls the display data signal based on these display designation signals, converts it into a designated video signal, and outputs it to the display device 13 to display it on the screen. Further, in order to change the conversion rule of attribute data, the attribute conversion setting circuit 12 generates a conversion designation signal manually or based on an instruction from a microcomputer, and outputs it to the attribute conversion circuit 12 to change the conversion contents. Note that the attribute conversion circuit 12 uses a read-only memory or the like.

Effects of the Invention As is clear from the above embodiments, the display device of the present invention is a monochrome flat panel display device that fully utilizes the attribute data method, which is one of the display data methods used for color display, such as a color CRT display device. , it is possible to convert to atverse display, no display, all dot display, etc., or change all character fonts to emphasize expressions. In addition, since the combination of colors used to create the above-mentioned signals can be changed manually or by commands from a microprocessor, color display software created for CRT displays that are already in circulation can be used to display only monochrome displays. 0 that can be displayed on the device

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a display device showing an embodiment of the present invention, FIG. 2 is a correspondence diagram showing combinations of foreground and background colors of attribute data in the same device and their conversion, and FIG. A schematic block diagram of a conventional display device, FIG. 4a. b is a configuration diagram of display data and attribute data in different data formats used in the same device. 1...Display data memory, 2...Attribute data memory, 3...Display control circuit, 5...Character generator circuit, 7...
...Attribute register, 7a...Attribute data conversion circuit, 12...Attribute conversion setting circuit, 8a...Video signal generation circuit, 13...Display device . Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 R: Sobers table H F: Right now on the top N:
Normal display / j Heat display Figure 3 Figure 4 (b) R: RetL Cj Agency Min #: Cwee 8 ((deceased) B: BJJLL (Blue) Tech 2 i, 'x, tg, t ho

Claims (1)

[Claims] a display data memory that stores display data; an attribute data memory that stores attribute data that specifies the color of the display data; and an attribute register that temporarily holds the attribute data;
a display control circuit that controls reading data from the memory in accordance with the display time and generates horizontal and vertical synchronization signals for a CRT display device; a character generator circuit that converts display data into a character font to be displayed on the screen; A display device comprising a shift register cascaded to a generator circuit, an attribute conversion setting circuit that changes a conversion rule for attribute data, and an attribute data conversion circuit that converts attribute data in accordance with the attribute data conversion rule.