JPS59168490A - 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 The present invention relates to a rusk scan type display device,
In particular, the present invention relates to a display device capable of displaying graphics such as figures and characters such as letters on the same display screen.

In recent years, CA D (Computer A 1ded
[1eslgn) system, etc., employs a graphic display device as an editing terminal,
When an operator performs work such as creating drawings, it is necessary for the operator to determine work procedures and the like in conversation with a central processing unit such as a CAD system and proceed with the work.

In such a case, in addition to the original graphical processing, the graphic display device may also perform conversational processing (character processing), that is, display messages from the central processing unit on the TV display monitor screen, or when the operator inputs characters from the keyboard. It is necessary to display the input characters on the TV display monitor screen.

In order to display characters such as the above message on a TV display screen using a graphic display device, the characters are decomposed into each line segment as shown in Figure 1 (a), and the coordinates (Xi, Y
l) to coordinates (X2.Yl), then from coordinates (X, Y) to coordinates (X, Y), and again to coordinates (X, Y).
The characters 11 A 11 can be displayed on the TV display monitor screen only by displaying three straight lines from to the coordinates (X, Y). It takes a considerable amount of time to finish displaying.

This display control processing time affects the response time to the central processing unit, which is a disadvantage that reduces the efficiency of the entire device such as a CAD system.

Because of the above-mentioned drawbacks, it is now common to have both a graphic ink display device and a character display device in the editing terminal.

The character display device registers a character pattern as shown in FIG.
code), the character generator is accessed, and the registered character pattern is read out and displayed.

In this way, the character display device is superior in character processing, so by arranging the character display device, the graphic display device only performs the original figure processing, and the character display device performs conversation processing with the central processing unit. It is also possible to do so.

However, this method requires both a graphic display device and a character display device as editing terminals, which increases the cost of the editing terminal.Also, since the operator uses both the graphic display device and the character display device, the operation becomes complicated. This had the disadvantage of causing a decrease in work efficiency.

The purpose of the present invention is to overcome the drawbacks of the prior art as described above, and to create a single display device by adding the functions of the main 11-screen graphic display device to the 17-screen graphic display device. The function of the graph ink display device that performs graphical processing on the
To provide a low-cost display device that shares the functions of a character display device that performs conversation processing, thereby simplifying operator operations and improving processing speed, achieving efficient system operation. It is in.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2(a) shows both sides of the TV display monitor of the display device of the present invention, in which a display area of m dots by n dots and a display area 50 of graphics (figures, etc.) of m dots by ni dots are shown. and■ Dora 1~xn6.
This shows that a dot character (letter, etc.) display area 51 is provided. Here, figures sent from the central processing unit (figures created from figure data) are displayed in the above-mentioned graphic display area 50, and text data for conversation such as messages is displayed in the above-mentioned character display area 51. Out.

FIG. 4 is a block diagram showing the configuration of an embodiment of eight displays according to the present invention. The control unit 1 has the functions of transmitting and receiving data to and from the central processing unit, processing graphic data from input devices (keyboards, tablets, etc.), and processing conversations. The graphic display control 2 receives the graphic data from the control section 1, converts it into dot data (raster conversion) that can be displayed on the TV display monitor 5, and displays the graphic data on the video display control section 4. Output data. The character display control section 3 receives character data from the control section 1, reads out a specified pattern from the character generator 33, and outputs the character display data to the video display control section 4. The video display control unit 4 creates each insertion timing signal in synchronization with the screen scanning of the TV display monitor 5, and when scanning the graphic display area 50 in FIG. and 8 in the character display area 51 of FIG. 2(a).
During three-digit scanning, character display data from the character display control section 3 is output to the TV display monitor 5 via the video display control section 4, respectively.

Each part of the display device according to the embodiment of the present invention configured as described above will be explained in detail below. The control unit 1 includes a line interface circuit 10 that controls data transmission and reception with the central processing unit, and processes graphic data and speech (character) data received by the line interface circuit 10, and sends the graphic data to the graphic display control unit 2. , also conversation (text)
The data is output to the character display control section 3. In addition, graphic data from the keyboard 6 A5 and tablet 7
Conversation (character) data is input and processed, and the data to be sent to the central processing unit is output to the line interface circuit 10.
The processing circuit 11 is configured to control outputting data to be displayed on the screen of the display monitor 5 to the dollar-noise display control section 2 or the character display control section 3.

The graphic display control section 2 includes a raster conversion circuit 20, a graphic memory 21, a line buffer circuit 22, and a gradation conversion circuit 23. This graphic display control section 2 will be explained with reference to FIG. Now, when displaying a straight line figure as shown in Fig. 3(a) on the TV display screen, the control unit 1 inputs the figure data including the starting point coordinates (X+, Yl), the ending point coordinates (XY, Y), and the straight line. Data and gradation data are given. Based on this graphic data, the raster conversion circuit 20 creates dot data that can be displayed on a TV display screen as shown in FIG. 3(b), and stores the dot data in the graphic memory 21.

This graphic memory 21 has a capacity of the number of dots corresponding to the graphic display area of the TV display screen. The data stored in the graphic memory 21 is stored in the line buffer circuit 2 as a group (block) of one line data for each scan (raster) of the TV display screen.
2 is read out, and then a gradation is given by the gradation conversion circuit 23 and a graphic display signal 45 is output to the video display control section 4.

On the other hand, the character display control section 3 is composed of a memory control circuit 30, a character memory 31, a character code buffer circuit 32, and a character generator 33, and receives character data from the control section 1 and controls the character display. This character data is stored in the character memory 31 by the circuit 30.

The character memory 31 has a capacity of as many characters as can be displayed in the character display area of the TV display screen. The character data stored in the character memory 31 is sent to the character code buffer circuit 3 as a group (block) of one line data per one scan 40 of the TV display screen.
2, accesses the Gear A/Lactage generator 33 using the read character data, reads out the character pattern of the registered performance in the character generator 33,
A character display signal 46 is output to the video display control section 4.

The video display control section 4 includes a switching control circuit 40, a synchronization timing generation circuit 41, a parallel-to-serial conversion shift register circuit 43, and a D-A conversion circuit 44, which are essential parts of the present invention. The operation of the video display control section 4 will be explained with reference to FIGS. 4 and 5.

The synchronization timing generation circuit 41 generates a synchronization timing signal @42 that is synchronized with the assessment of the TV ice play monitor 5, and the switching control circuit 40 uses this synchronization timing signal 42 to determine whether the scanning of the TV display screen is in the graphic display area or in the character display area. It is determined whether the display area is in the display area, and the graphic display signal (figure display data) /45 from the graphic display control unit 2 is output in parallel during the display period of the graphic display area.
D
-A conversion circuit 44 converts the signal to a specified gradation level and outputs it to the TV display monitor 5 in units of display dots to display figures and characters.

FIG. 5 is a diagram showing details of the configuration of the switching control circuit/IO. Graphic display signals from the gradation conversion circuit 23 of the graphic display control section 2 @ 4.5-1 to 45-n and the character generator 33 of the character display control section 3
The character display signals 46-1 to 46-n from the respective AND circuits -1 to A↓-n and △z
-1 to △x-n, and this AND circuit A1-1 to
Switching signal generation circuit 48 synchronizes A1-le and AND circuits Aλ-1 to △J-% with timing signal 42 as reference input
The AND
Outputs of circuits A1-1 to AI-n and AND circuit A2-
The outputs of 1 to 2-n are input to OR circuits 01-1 to 01-0. By the above operation, OR circuits 01-1 to 01-n
The composite display signals 47-1 to 47-0, which are the output signals of , are the graphic display signal 4 while scanning the graphic display area.
5-1 to 45-n, and while the character display signal is being scanned, it becomes character display signals 46-1 to 46-n. That is, the switching control circuit 40 controls switching between the graphic display signal 45 and the character display signal 46 in this manner.

As explained above, the display device of the present invention can simultaneously process graphic data and character data using different display control methods by having a graphic display control section and a character display control section, and furthermore, the display device can simultaneously process graphic data and character data using different display control methods. Using a switching control circuit, graphic data from the central processing unit and input device can be displayed in the graphic display area of the TV display monitor screen, and character data can be displayed in the character display area, so the performance is equivalent to that of two conventional display devices. It is possible to realize this with a single device, and furthermore, it is possible to provide an economical display device with simple scanning and good responsiveness.

FIG. 2(b) is a diagram showing one embodiment of the screen usage of the TV display monitor of the present invention, in which the display area is set to 1024 vertically.
The range is dot x 1280 dots horizontally, of which 1 vertically
The area of 0.24 dots x 1024 dots horizontally is the graphic display area, and the remaining area of 1024 dots x 256 dots horizontal is the character display area. The reason for this is that the screen size ratio of TV display monitors currently used for graphic display devices is 3 vertically.
:Most of them are 4 horizontally, and the display area is often used at a ratio of 3:4 horizontally, but in actual graphic data processing, the screen of a TV display monitor is often 1:1 horizontally. (This is because the coordinate specification area of many tablets is 1:1 horizontally.)
: There is no practical problem even if the horizontal ratio is 1. Therefore 11
The area of 0.24 dots x 1024 dots horizontally is the graphic display area, and the remaining area of 1024 dots x 256 dots horizontal is the character display area. Note that as long as the character display area has the above range, it can be used sufficiently for message processing.

[Brief explanation of the drawing]

FIG. 1(a) is a diagram showing a method of displaying characters on a graphic display device, FIG. ) and FIG. 2(b) are diagrams showing an example of the screen usage of the TV display monitor of the display device according to the embodiment of the present invention, FIG. 3 is a diagram for explaining graphic display control, and (a) is from the coordinates (Xl, Y+) to the coordinates (x, ,
(b) shows the case where a straight line is displayed in (yz), and (a)
An example of converting a straight line into displayable data is shown below. FIG. 4 is a block diagram showing the configuration of a display device according to an embodiment of the present invention, and FIG. 5 is a block diagram showing details of the switching control circuit.
The lock diagram and FIG. 6 are diagrams for explaining the timing of switching control. 1... Control unit 2... Graphic display control unit 3
...Character display control unit 4...Video display control unit 5...TV display monitor 6...
Keyboard 7...Tablet 1-10...Line interface circuit 11...Processing circuit 20
... Raster conversion circuit 21 ... Graphic memory 22 ... Line buffer circuit 23 ... Gradation conversion circuit 30 ... Memory control circuit 31 ...
Character memory 32...Character code buffer circuit 33...Character generator 4
0... Switching control circuit 41... Synchronous timing generation circuit 42... Synchronous timing signal 43...
・Parallel-direct conversion jit register circuit 44...D-A
Conversion circuit 45...Graphic display signal 46
...Chiaractor display signal 47...Synthetic display signal 48...Switching signal generation circuit 49...Switching signal 5
0...Graphic display area 51...Chiaracta display area

Claims (1)

[Claims] A rusk scan type display device is divided into a graphic display control section that controls the display of graphic information such as figures, a character display control section that controls the display of character information such as letters, a graphic display area, and a character display area. on the displayed display screen.
a switching control section for switching and displaying the output from the graphic display control section at the graphic display timing and the output from the character display control section at the character display timing, and displaying the graphic information on the display screen. and the character information simultaneously.