JPS58107947A - Keyboard - Google Patents

Abstract

PURPOSE:To attain the time seeking objective keys and to reduce misdepression of the keys, by assigning a character pattern group corresponding to a character set designated through the depression of a shift key to the corresponding key and displaying the pattern on a display on each key. CONSTITUTION:A code corresponding to a shift key is outputted on a data bus line 4, read in a microcomputer 5, a character set to be displayed is recognized from the read code and the storage address of the character pattern belonging to the character set and corresponding to each key is trasnmitted to an ROM7 via an address bus line 6. The ROM7 outputs a stored character pattern on the line 4 and the computer 5 transmits the display address of each key on a display 8 via the line 6. The display circuit 8 displays the character pattern of the line 4 on a liquid crystal display 9(11) on each key according to the display address.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a keyboard for an input device in a data processing device.

Conventionally, this type of keyboard allows you to select a character set (for example, uppercase letters of the alphabet 1.J1 or kana characters) by using the shift key, as shown in Figure 1.
It was possible to input two or more characters with one key. Therefore, one or more characters were written on each of the seven keys. Therefore, it takes time to search for the desired key.
Another disadvantage is that the number of incorrect key presses increases.

The present invention has been made in view of the above-mentioned conventional situation,
Therefore, an object of the present invention is to provide a display on each key, store a character pattern corresponding to each key for each character set specified by the shift key, and press the shift key to switch to the specified character set. The object of the present invention is to eliminate the above-mentioned drawbacks and provide a novel input device that is easy to use by allocating corresponding character patterns 7 to each corresponding key and displaying them on a display above each key.

The above object of the present invention is to provide one or more shift keys for specifying a character set, a character pattern storage section for storing a character pattern corresponding to each key for each character set, and a character pattern storage section for storing a character pattern corresponding to each key for each character set; A keyboard comprising: a control unit that extracts a character pattern group corresponding to a character set from the character pattern storage unit and assigns it to each corresponding key; and a display unit disposed on each key to display the character pattern. , achieved by.

Next, a preferred embodiment of the present invention will be explained in detail with reference to the drawings.

In FIG. 1 showing an embodiment of the present invention, an embodiment of the keyboard according to the present invention includes a key matrix λ, an input circuit 3 connected to the key matrix λ, and a data bus line connected to the input circuit 3. A read-only memory leaf is connected to the microcomputer S via an address bus line t, and a read-only memory is connected to the microcomputer S via an address bus line 6. Read only memory 7
a display circuit g connected to the input circuit 3 via a data bus line, a liquid crystal display connected to the display circuit t, and a display circuit g connected to the input circuit 3 via a data bus line t; It is composed of an output circuit 10 and the like. Here, each key is composed of a liquid crystal display // and a switch /λ, as shown in FIG.

The read-only memory leaf stores character patterns corresponding to each key for each character set specified by the shift key.

When the power is turned on, the microcomputer S stores the storage addresses of character patterns belonging to a default character set (for example, an English character set) and corresponding to each key in a read-only memory via the address bus line 6. Send to F. The read-only memory that has received the storage address outputs the stored character pattern to the data bus line.

Next, the display address of each key of the microcomputer is sent to the display circuit via the address bus line 6. The display circuit g displays the character pattern obtained from the data bus line Hiroshi on the liquid crystal display above each key in accordance with the display address, and maintains this state until the shift key is pressed. This state is shown in FIG. 9(a).

When the shift key (for example, the shift key for kana characters) is pressed, the point λa on the key matrix λ becomes "on".The input circuit 3 detects the "on" state and sends the code corresponding to the shift key to the data bus. The code is read into the microcomputer J via the data bus line.The microcomputer S is
The character set to be displayed is recognized from the read code, and the storage address of the character pattern belonging to the character set and corresponding to each key is sent to the read-only memory 7 via the address bus line 6. The read-only memory 7 which has received the storage address outputs the stored character pattern to the data bus line Hiroshi.

Next, the microcomputer S sends the display address of each key to the display circuit via the address bus line 6. The display circuit g displays the character pattern obtained from the data bus line Hiroshi on the liquid crystal display above each key according to the core display address until the shift key is released or another shift key is depressed. Maintain this state.

This state is shown in FIG. 9(b). When the shift key is released, the above-mentioned state when the power is turned on (Fig. 9(a)
)become.

When a key other than the shift key is pressed, the corresponding point on the key matrix becomes 5 on °'.

The input circuit 3 detects the "ON" state and sends a code corresponding to the pressed key to the data bus line Hiroshi. The microcomputer S reads the code and sends an output command to the output circuit 10. The output circuit IO that received the code outputs the code to the outside.
This makes it easier for the operator to search for the desired key.

Above, an embodiment has been described in which seven character codes are generated by pressing one key. Furthermore, in the case of a key that performs seven operations when the / key is pressed, at least one character pattern representing the function assigned to the key is stored in the read-only memory 7. be able to.

Even in this case, it does not go beyond the scope of the claims of the present invention.

As explained above, in the present invention, a display device is provided on each key, a character pattern corresponding to each key is stored for each character set specified by the shift key, and the character pattern can be specified by pressing the shift key. By assigning a group of character patterns corresponding to the specified character set to the corresponding keys and displaying them on the display above each key, the time spent searching for the desired key can be shortened, and the number of incorrect key presses can be reduced. There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional keyboard, FIG. 2 is a block diagram showing an embodiment of the present invention, FIG. 3 is a perspective view of the key portion of the embodiment shown in FIG. Figure (a) is a plan view showing the state of the keyboard immediately after the power is turned on in the embodiment shown in Figure 1, and Figure 7 (b) is a plan view showing the state of the keyboard in the embodiment shown in Figure 2. FIG. 3 is a plan view showing the state of the keyboard when a shift key is pressed. /...Power line, Co...Key matrix, 2a...
・Point on the key matrix corresponding to the shift key, 3・
...Input circuit, G...Data bus line, S...Microcomputer, 6...Address bus line, ?
... Read-only memory, t... Display circuit, 9...
・Liquid crystal display, IO...output circuit, l/...
LCD display, 1.2...switch. Patent applicant: NEC Corporation Representative: Patent attorney Yutabe Kumagai

Claims (1)

[Claims] one or more shift keys that specify a character set; a character pattern storage unit that stores a character pattern corresponding to each key for each character set; and a character pattern that corresponds to the character set specified by pressing the shift key. A keyboard comprising: a control section that extracts a group from the character pattern storage section and assigns it to each corresponding key; and a display section disposed on each key to display the character pattern.