JPS5880727A - Keyboard device - Google Patents

Abstract

PURPOSE:To obtain an optimum repeating cycle for each key and to improve the operability of a keyboard device, by producing the repeating constant corresponding to the operated key and controlling the time interval of the repeating action of the operated key in accordance with the repeating constant. CONSTITUTION:A key switch matrix 1 is scanned by a key encoder 2 through a line 10 and synchronously with the clock given from an oscillator 3. The key return signal is received by a line 11, and the key ON strobe signal and the key data corresponding to a key are fed onto a line 12 and a line 14 respectively when the key is operated. At the same time, a repeating constant corresponding to each key is stored previously to a repeating constant table 4, and an access is given to the table 4 with the key data used as an address. Then the repeating constant is read out onto a line 15 and fed to a counter 5. The key strobe signal is applied to the counter 5 via an OR gate 6, and the time interval is controlled by the counter 5 for the repeating action. Thus an optimum repeating cycle is obtained for each key.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a keyboard device having a repeat operation, and in particular,
Concerns the control of the time interval of repeat operations (repeat cycle).

In conventional keyboard devices having a repeat function, the repeat cycle was constant for all repeat keys. 17. Generally, the operating speed of a typewriter or the like that is combined with a keyboard device is considerably different between the A, , , /N keys and the other C/几 keys and TAB keys. Considering these differences in operating speed depending on the function of the keys, in conventional keyboard devices, it is necessary to determine the +), -, and cycle according to the row of keys with slow operating speed. will be sacrificed.

SUMMARY OF THE INVENTION In order to eliminate the disadvantages mentioned above, the present invention provides a keyboard device in which repeat cycles are optimally controlled for each key and operability is improved.

However, the ijp board device 1:(,4:il
'-1: Means for generating a repeat constant corresponding to gee, and whether it was generated by the means or caused a repeat constant fault.
1.) The first embodiment of the present invention will be described below with reference to the drawings.

In the figure, l is a keyswitch matrix consisting of a group of keyswitches that are opened and closed by operating a group of keys (not shown). The encoder 2 synchronizes with the basic clock provided by the oscillator 3 and outputs the key switch via the line 10.
The matrix l i-scans and the key return signal is received on line 11.

When a certain key is pressed, line 12 is sent from encoder 2.
A key ON strobe signal is output on the line 14, and a code corresponding to the pressed key is output on line 14 as key data.

The repeat constant table 4 stores repeat constants for each key. When a key is pressed, the encoder?
The repeat constant table 4 is accessed using the key data output from the key data as an address, and the repeat constant corresponding to the pressed key is read out on line 15. The key ON strobe of 41'r is sent as a key strobe to line 16 via OR and gate 6, and the repeat constant on line 15 is loaded into counter 5 at the timing of this key strobe.

This counter 5 controls the repeat cycle for the pressed keys, and counts up by 1 each time the basic clock is applied through the ANI) game door. The overflow carry of the counter 5 is input to the OIt gate 16 through a line 17 and sent to the line 16 as a key strobe. At the same time, the repeat constant is loaded into counter 5 again,
Counter 5 starts counting up again. This operation continues until the key is released and the encoder 2 outputs the key 0F1 strobe on lines 1:3. G-OP
When the F strobe is output, the counter 5 is cleared to zero and the line 18 becomes ``0'', so the input of 04 is basically suppressed by the gate 11, and the counting operation of the counter 7 is stopped. .

In this way, the first key strobe after the key is pressed is output from the encoder 2, but from then on, simply by continuing to press the key, the key strobe is automatically repeatedly sent out by the counter 5, performing a so-called reheat operation. It will be done. Then, the time interval at which the overflow carry (Keith I-a-7') is output from counter 5 (which corresponds to the repeat cycle) depends on the repeat constant loaded. Therefore, if the repeat constant for each key is optimally determined and stored in the repeat constant table 4, the repeat cycle can be optimally controlled independently for each key.

In this embodiment, the repeat cycle is set using the period of the basic clock as a unit, and the repeat constant is stored in the repeat constant table 4 in the form of a two's complement of a value indicating how many times the basic clock period is. Therefore, the repeat constant is O
(An antilog number), when the corresponding key is pressed, the line 18 is "0" from the beginning, the AND gate 7 does not open, and the counter 5 does not count up, so no repeat operation is performed in practice.

As I mentioned to my son, the present invention allows the repeat cycle to be optimally controlled for each key, so the operability of the keyboard device can be greatly improved, and its effects are remarkable.

It should be noted that the present invention is not limited to the configuration itself of the above-described embodiment, and it goes without saying that it can be implemented in various modified forms without departing from the gist of the present invention.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. 1... Key switch matrix, 2... Encoder, 3... Oscillator, 4... Repeat constant table,
5...Counter, 6...OIt gate, 7...Δ
N I) Gate. Agent Patent Attorney Makoto Suzuki

Claims (1)

[Claims] 1. In a keyboard device i7" having a repeat function, a means for generating a constant number of repeats corresponding to a pressed key, and a repeat I operation for the pressed key according to the repeat constant generated by the means. A board device characterized by comprising means for controlling a time interval.