JPS6243721A - Keyboard - Google Patents

Abstract

PURPOSE:To allow one keyboard to ensure a variety of key operations regarding a character array by executing a display corresponding to keys in a character array by means of a logic circuit in a keyboard or through control of CPU with the aid of the signal of a mode selection switch installed on the keyboard. CONSTITUTION:In correspondence to the mode selected through the mode selection switch 2, a mode signal is transmitted to a display controller 4 and a code conversion logic circuit 6. The former 4 transmits and displays a key code corresponding to the mode of each key included in a key group 3. When it key-operates, a code converting logic circuit 7 converts a character code and a symbol code into codes corresponding to a character and inputs them to the CPU. Modes in a character array can be increased by extending the code converting logic circuit 7. Since any character array can be possible for the keyboard unit without affecting the CPU, a mode suitable to individuals can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a keyboard having a CPU, such as a word processor or a personal computer, in which the character arrangement can be changed.

[Background of the invention]

It is easy to use if keys can be operated using any pattern of character arrangement from a single keyboard. It is also convenient to be able to input various types of information using one keyboard. Therefore, if the character arrangement is made variable so that the keyboard can be input in a variety of ways, and if it is set to 5 so that special symbols can be typed out, the keyboard becomes very usable. Note that Japanese Patent Application Laid-Open No. 71789/1989 relates to mode switching.

[Purpose of the invention]

An object of the present invention is to make the character arrangement of the keyboard variable, and to
The purpose is to enable key operations with a variety of character arrangements using a single keyboard.

[Summary of the invention]

According to the present invention, characters on the keyboard are displayed in a dot matrix display, and a character arrangement corresponding to a key is displayed by a logic circuit or CPU control in the keyboard in response to a signal from a mode selection switch attached to the keyboard.

When a key is operated, the corresponding key code is transferred from the logic circuit to the CPU.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 shows one embodiment of the present invention. In this figure, 1 is the entire keyboard, 2 is a mode selection switch for selecting the character arrangement (j), and 3 is a group of keys.

The character display section of each key included therein has a dot matrix character display system, and can display characters corresponding to the input code. 4 is a display controller for sending a character code to display characters on the key group. 5 is C that receives control signals from the keyboard
It is PU. 6 is a logic circuit that converts a character code into another code.

A mode signal corresponding to the mode selected by the mode selection switch 2 is sent to the display controller 4 and the code conversion logic circuit 6. The display controller No. 4 sends a key code corresponding to the mode to each key of the No. 6 key group, and displays the key code seven times.

When a group of keys 6 is operated, a code conversion logic circuit 7 converts the character and symbol code into a code corresponding to the character and inputs it to the CPU. The number of character arrangement modes can be increased as desired by adding 7 code conversion logic circuits. If this keyboard is used, any character arrangement can be made with the keyboard alone without affecting the CPtJ, so it can be used in a mode that suits the individual's preference.

FIG. 2 shows another embodiment. In this diagram (7 is C
Indicates memory within the PU.

The signal from the mode selection switch 2 is sent directly to the CPU 5. The CPU recognizes the mode.

There are 6 memories in the CPU, in which character code tables corresponding to the modes are prepared. 5 CPUs
reads the table corresponding to the recognized mode and transfers it to the display controller in step 4. .

The display controller No. 4 sends the code to each key of the No. 3 key group for display.

When the key group of 3 is operated, the key code is CP of 5.
Transferred directly to U. The CPU reads the corresponding code from the seven code tables in the memory corresponding to the previously recognized mode and recognizes the type of input character. According to this embodiment, the logic circuit within the keyboard can be made relatively simple, and the keyboard can have any character arrangement.

〔Effect of the invention〕

According to the present invention, keyboard operations can be performed using an arbitrary arrangement of characters and symbols.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment. 1... Keyboard, 6... Key group, 4... Display control panel, 5... CPU, 7 Memory.

Claims (1)

[Claims] 1. On the keyboard, use the mode selection switch provided on the keyboard to operate the logic circuit inside the keyboard and give each key a code signal, or input the signal corresponding to the mode selection switch to the CPU and use the corresponding control data from the CPU. A keyboard characterized in that the character arrangement can be changed by giving a code signal to each key.