JPS58171078A - Character 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 [Description of the Technical Field] The present invention relates to a character display device, and more particularly, to a character display device that can extend displayed characters to the buttocks.

[Description of prior art]

Conventionally, this type of device stores character pattern information corresponding to an input key in a read-only memory in advance, and reads cIR? by inputting from the input key. Characters are displayed on a device or dot printer.

However, in conventional character display devices, character pattern information is stored in advance in a memory dedicated to continuous reproduction, so the nine types of displayed characters are not limited to the stored character pattern information, and the user cannot change the character display later. It has the disadvantage that it cannot display necessary kanji or characters outside the range of standard characters. One technique to solve this problem is to replace the read-only memory. However, it has drawbacks such as being cumbersome to operate and expensive.

[Explanation of purpose]

The present invention improves this point, and aims to provide a character display device that allows a user to easily input and memorize characters necessary for character display, and that can expand the types of displayed characters. purpose.

[Summary of the invention]

The present invention includes a first memory circuit storing character pattern information, a keyboard for inputting character information, and a second memory circuit for specifying addresses of the first memory circuit in response to input from the keyboard. A character display device comprising a memory circuit of C-wing! and means for displaying character pattern information read from the first memory circuit. device and this CRT
A logic circuit that displays a dot matrix for one character on the device and this CI? The third storage circuit comprises a light pen for inputting character pattern information sounds into a dot matrix displayed on the device, and a third storage circuit using a random access memory for storing character pattern information input with the light pen. The address of the character pattern information stored in is stored in the second memory circuit in response to the manual operation of the keyboard, and the character pattern information read from the third memory circuit is stored in the first memory 1. 111M, so that it can be displayed on the display means according to the same procedure as the character pattern information read out from the text.

[Explanation based on examples]

An embodiment of the present invention vA〇1 will be explained based on the drawings.

FIG. 1 is a block diagram of an O11 section according to an embodiment of the present invention. An input terminal l to which a video signal is input is connected to a synthesis path 2. The output of this synthesis circuit 20 is led to the synchronous separation circuit 3. The output of the sync separator circuit 3 is led to a display logic path 4. The output of this display logic circuit 4 is yt AM (Random
Access Memory) 5K led.

The character address signal from this mouse M5 is sent to a ROM (Read Only Mem) that stores character pattern information.
ory) and RAM 7, which is a feature of the present invention. The outputs of the ROM 6 and the ROM M7 are led to a shift register 8, respectively. The output of this shift register 8 is led to one switching terminal a1 of a switching circuit 9. The output of this switching circuit 9 is led to a combining circuit 2. The output of this synthesis circuit 2 is led to a CIL device 10 and an output terminal 11K, respectively.

Further, in FIG. 1, 13 is a light pen, and the output of this light pen 13 is led to a light pen logic circuit 14K. The output of this light ben logic circuit 14 is RA
It is led to a design logic circuit M16 with M15. This design logic circuit 16 is connected to a bus 17. Further, a floppy disk 18, a keyboard 19, a CPU 20 (central processing unit) are connected to the bus 17, and the display logic circuit 4, the mouse M5, the ROM 6, and the screen M are connected to the bus 17.
7 are connected to each other.

Further, the output of the synchronous separation circuit 3 is led to the design logic circuit 16K. In addition, the CPU 2
The control output of G is led to the synthesis circuit 2 via the bus 17.

The characteristic operation of the present invention will be explained using such a circuit configuration. First, the operation of inputting a character pattern that is not stored in the moM6 will be explained.

If 4tpH kanji etc. for character display are not stored in the OM6, press the 190 character design key on the keyboard. This is K〉, CPU 20 decodes this,
The switching circuit 9 is switched, contact a is connected to Km, and the synthesis circuit 2 is controlled to transmit the white rusk signal to the CRT device 10.
Give K. Also, the dot matrix pattern tI which is enlarged by one character from the design logic circuit 16! broth,
It is displayed on the CIT device 10 in synchronization with the video signal of the white rask signal.

This state is shown in FIG. In figure 2 it is 52 x 520
Dot! An example of trix is shown. In addition, the left end in FIG. 2 shows a 0-%-de selector area for character design.

Now, when characters to be input are drawn on the dot matrix using the light pen 13, the output signals of these two pens 13 are sent to the design logic circuit 16K, and L A M 1
The address K corresponding to each dot matrix of 5 is written as character pattern information. The contents of this volume M15 are displayed on the dot matrix of the CIT device 1O, and are also displayed in the monitor area 24 in an actual display state.

When it comes to character design, C-o! Each mode in the mode selector area of the device 100 is used to perform horizontal expansion or reduction or vertical expansion or reduction.

When the character to be input is drawn on the dot matrix, the user operates the keyboard 19 and presses a character key corresponding to the character to be input. The c p U3O decodes this and stores the character pattern information of the above M15 in the above M7C) address of the character address corresponding to this character key. At this time, character pattern information is also stored on the 70 disk 18K.

Next, when displaying characters with this device, the switching circuit 9 connects the switching contacts 11 II K 11 ! I will be treated. In this state, the character to be displayed is specified from the keyboard 19.

This is decoded by 〇P U 2G, the character address corresponding to this character key is specified from 11M5, and character pattern information is successively outputted from Tsubasa OM6 or Oom M7 to shift register 8.

At this time, a characteristic operation of the present invention is performed, and if the displayed character is a pre-stored standard character, the character address of ROMg is specified, and if the displayed character is a character input by the user by the above operation, the character address is specified. M70 character address is specified.

Further, the CPU 20 instructs the display position, and the display logic circuit 4 sends a display position signal generated by the video signal K11l1 to the register 8, and the character pattern information is sent to the Ilt circuit 2 in conjunction with the display position signal KM. Now, superimposed characters are displayed at a predetermined position on the Cat screen.

Also, at this time, a cursor is displayed at the character display position of the CRT device 10.

[Explanation of effects]

As explained above, the original E! According to AK, CI? It was decided to display one character of t)ff) on the device, draw a small number of characters to be input with a light pen, and store this character park in a memory circuit in correspondence with the character key.

Therefore, the characters required for character display can be entered into the device by the user with a simple operation, and these characters can also be displayed by operating the key ``K'' in the same way as in conventional devices. . For this reason, the types of characters displayed on the character display device can be greatly increased, and the versatility can be significantly improved.Moreover, the operation is not complicated, and the number of additional parts is small (low cost, etc.). have an effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of main parts of an embodiment of the present invention. @2 Figure is a diagram showing the display pattern of the Cat device of the above embodiment. l...Input terminal, 2...Composition circuit, 3...Synchronization separation circuit, 4-...Display logic, 5.7.15
... 凰AM, 5... IOM, 8...-shift register, 9... switching circuit, 10... CRT device, 11...
- Output terminal, 13... Light pen, 14... Light pen logic 1 path, 16... Design logic circuit, 17... Bus, 18... Floppy disk, 19... Keyboard, 20...CPU0 patent applicant Tomoei Co., Ltd. Agent Patent attorney Naotaka Ide

Claims (1)

[Claims] (1) A first memory circuit that stores character pattern information, a keyboard for inputting character information, and a second memory circuit that specifies addresses of the first memory circuit in response to input from the keyboard. A character display device comprising a memory circuit and means for displaying character pattern information read from the first memory circuit, comprising: a CRT device; a logic circuit for displaying a dot matrix for one character on the 01-page device; ,
The third storage circuit includes a light pen for inputting character pattern information into the dot matrix displayed on the CRT device, and a third storage circuit including a random access memory for storing the character pattern information input with the light pen. The address of the character pattern information stored in the memory circuit is stored in the second memory circuit in response to the manual operation of the keyboard, and the character pattern information sequentially outputted from the third memory circuit is stored in the first memory circuit. means for displaying the above character pattern information by the same procedure as the character pattern information successively outputted from the memory circuit of K;
A character display device characterized in that it is configured to be capable of displaying characters.