JPS6356551B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device that displays a large amount of characters or symbols using an electronic display device, such as a kanji display device using a CRT (cathode ray tube) or a PDP device (plasma display panel). Concerning capacitive display methods.

Generally, kanji displays using CRTs can only display about 200 to 1000 characters on a single screen due to the resolution limitations of the CRT, which is insufficient in capacity to display normal text. Therefore, even if you try to use it as a display for a Japanese word processor (text processing device), it is impossible to display all the text that can be stored on one page of commonly used JIS B5 to A4 paper. Therefore, it is impossible to check the arrangement of sentences within one page. PDP devices have an even smaller displayable character capacity than CRT devices, and are rarely applied to kanji displays.

With conventional technology, there is a method of displaying only the arrangement of sentences on one page, such as displaying a string of characters as a single straight line using a CRT display device as a computer terminal for editing newspaper pages. The means are known. However, in that case, it was impossible to identify each character, and it was impossible for the operator to decipher the content of the text.

It is an object of the present invention to eliminate these drawbacks and provide a method for displaying all the characters of a large volume, for example, one page to be printed, using a display device that displays relatively small characters. .

A feature of the present invention for achieving this object is that, in a display system for displaying characters or symbols on an electronic display screen, an array of characters or symbols is displayed as a straight line or a simple symbol, and a part of the array is moved by a cursor. It is a large-capacity display system in which a pattern of characters or symbols is displayed in a specified position based on a cursor. Embodiments will be described below with reference to the accompanying drawings.

FIG. 1 shows an example of a display according to the method of the present invention. Inside the display frame 1, a character string, that is, an arrangement of sentences is displayed by a straight line 2. straight line 2
A cursor 3 is displayed on the right side of the screen, which can be freely moved within the display screen by the operator using input means such as push buttons. In this example, the thickness of the cursor 3 is changed so that it can be clearly distinguished from the straight line 2.
A character pattern corresponding to a portion 4 of the straight line 2 indicated by the cursor 3 is displayed as a sentence 5 in a pattern area on the left side of the display frame 1. The number of characters that humans focus on when reading a sentence is the number of characters before and after the character they are reading, so the number of characters in sentence 5 should be around 5 to 20 characters, and as the sentence is read, the cursor 3 Move automatically. It is desirable that the speed of automatic movement is variable depending on the operator. The length of the cursor 3 corresponds to the number of characters in the sentence 5.

FIG. 2 shows an example of a device configuration for displaying the display shown in FIG.

The main CPU 6 of this device operates according to instructions from a program stored in a memory (not shown).
The memory 7 stores text for four display screens using its format information and the character code of each character, and one of the multiple screens stored in the large-capacity file memory 8 uses DMA (direct memory access method). It will be forwarded to you.
Further, after the content of the memory 7 is changed by the CPU 6, it is configured to be transferred to the memory 8 by DMA as well. The large capacity file memory 8 is controlled by a controller 9 that controls reading and writing of its contents. The operation unit 10 is
A signal for controlling the operation of the CPU 6 is outputted by a switch or the like for converting an operation such as an operator's button press into an electrical signal. The CRT display 11 displays the contents of the refresh memory 12.
The beam of the CRT is read out in synchronization with scanning, the brightness of the beam is modulated, and a visible image is displayed on the screen of the CRT display 11.

The contents of the memory 7 are read out by the CPU 6, converted into the straight line 2 in FIG. 1 according to the format information stored in the memory 7, and stored in the memory 12. As for the cursor position signal, the CPU 6 converts the character code indicated by the cursor 3 into pattern information based on the format information contained in the memory 7, and stores the pattern information in the memory 12. Here, the components such as the CPU 6, memory 7, memory 8, controller 9, operation unit 10, CRT display 11, and refresh memory 12 shown in FIG. Nothing changes. Since the essence of the method of the present invention lies in the content displayed on the CRT display screen, how should one screen worth of text information stored in the memory 7, which is the same as the conventional method, be handled in the refresh memory 12? The following is an example of how it is transferred. Note that the illustrated operations are normally performed by software of the CPU 6.

FIG. 3 shows the contents of one screen worth of text information stored in the memory 7. This content is the format information and character code of the additional text mentioned above.

For the sake of explanation, a method is shown here in which each character in the text is given an X, Y address on the screen and its character code, but it is possible to reduce the amount of data by using normal means. The contents of the memory 7 are of course binary numbers in a normal computer system, but here the X and Y addresses are shown as decimal numbers, and the character code is shown as the character itself. In FIG. 3, each horizontal line represents information for one character. X indicates the line position of the text, and Y indicates the number of characters from the top. The actual screen (partially shown) is as shown in FIG. That is, X = 6 (6th line), Y = 12 (from the top
The 12th character) is “book” and is 40 characters from the top of the 15th line.
The first character is “Yong”.

A method for converting and writing information from the refresh memory 12 and memory 7 for display on a CRT will be described below. First, the contents of the memory 7 are searched for characters other than blanks included in X=1, and among them, characters with the smallest and largest Y values are searched. For example, if we assume that X=1 and the minimum value of Y is 5 and the maximum value is 20, then the coordinates of the corresponding point on the CRT screen on the refresh memory 12 (the coordinates of point P are expressed as P(X, Y)) ) Point A (X=
1, Y=5), and the straight line AB connecting point B (X=1, Y=20) is written in the refresh memory 12 so as to be displayed as a solid line. If the CRT display 11 is a dot type display, from point (X=1, Y=1) to point (X=1, Y=4) is "0"("0" is CRT
beam is dark, “1” is bright), point A (X=
1, Y=5) to point B (X=1, Y=20).

In this way, the character string is displayed in a straight line on the CRT screen for each line of X=1, 2, 3...

The display of the cursor 3 as well as the display of the text 5 will be in a coordinate system different from the above-mentioned X, Y coordinates, but such a display can be done by dividing the area in the memory 12 and dividing it into an X, Y coordinate system. Displaying on the same screen can be done using any normal means.

Here, the CPU 6
will be managed.

In the screen example shown in Figure 4, the starting point of the cursor is X=
6, Y=12, and the end point is X=6, Y=26.

Then, from the memory 7, from the character "hon" corresponding to X=6, Y=12 to the character "do" corresponding to X=6, Y=26 are generated by a character generator (not shown) into a dot matrix, etc. All you have to do is convert it into a format that allows characters to be displayed on a CRT display and write it into the memory 12.

Furthermore, by directing the display screen in the accompanying drawings using a light pen or a cursor other than the cursor 3, it is possible to modify sentences and characters, change the arrangement, etc.

As explained above, the present invention does not display each character of a sentence, but displays a string of characters as a straight line, specifies the required part with a cursor, and displays the pattern of characters in that part. It is possible to display a large amount of text using a low-resolution display device that can only display a relatively small amount of characters, and the displayed characters are the same as those necessary to express one character. The number of pixels can be increased,
It has the advantage of being able to display natural-looking characters.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a display to which a large-capacity display system according to the present invention is applied, FIG. 2 is a block diagram of a device according to the present invention, and FIG.
FIG. 4 is a diagram showing information on the screen. FIG. 4 is a diagram showing an example of screen display. 1: display frame, 2: straight line, 3: cursor, 4: cursor designation area, 5: pattern area.

Claims (1)

[Claims] 1 In a display system in which characters or symbols are displayed on an electronic display screen, an array of characters or symbols is displayed using straight lines or simple symbols, and a part of the array is designated and displayed by the position of a cursor, and the part designated by the cursor is displayed. A large-capacity display system characterized by displaying a pattern of characters or symbols.