JPH0540557A - Keyboard device - Google Patents

Abstract

PURPOSE:To prevent erroneous inputs by selecting and outputting an input from a more strongly pushed key when plural keys are almost simultaneously pushed down on the keyboard. CONSTITUTION:This keyboard device is equipped with a sensor part 1A to identify which key is pushed down or touched and to output sensor data in proportion to pushing pressure, buffer part 2 to temporarily store key codes outputted from the keys pushed down on a keyboard 1 and to successively output the data afterwards, discrimination part 3 to discriminate the key pushed down with the strongest pressure when the plural keys are almost simultaneously pushed down or touched, and comparison part 4 to compare the key code identified by the discrimination part 3 with the key code outputted by the buffer part 2 and to output the key code only when both the key codes are coincident. When the plural keys are almost simultaneously pushed down at an input part 1, the key code of the key pushed down with the strongest pressure is outputted from the comparison part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a keyboard device,
In particular, it relates to a keyboard device for inputting various characters and numbers of an information processing device such as a computer.

[0002]

2. Description of the Related Art In a conventional keyboard device, a user can input numbers, special symbols or characters (hereinafter collectively referred to as characters).
When an adjacent key is accidentally pressed or touched with the key corresponding to the character that should be originally pressed or touched while inputting, the original character and the incorrectly input character are simultaneously displayed on this keyboard device. It is converted into an electric signal and output to an external device such as a computer.

[0003]

In the above-described conventional keyboard device, when keys other than the intended key are accidentally pressed or contacted at the same time, the characters of the keys accidentally pressed or contacted are simultaneously input. Output to an external device. As a result, extra work is required to erase the characters that were entered by mistake, and along with that work, an operation error on the keyboard occurs and the entered character string or data is destroyed in the worst case. There was a problem that it would end up.

[0004]

A keyboard device according to the present invention has a plurality of keys for inputting data, and when the plurality of keys are pressed, a key code individually assigned to each of these keys. In a keyboard device for outputting a signal in synchronization with a clock signal from the outside, when the plurality of keys are pressed, these keys are individually identified and sensor data having a level proportional to the pressure when the keys are pressed. A sensor unit for generating and outputting the key code signal, a buffer unit for receiving and temporarily storing the key code signal, and sequentially outputting the temporarily stored key code signal in storage order in accordance with the clock signal from the outside. , When the sensor data is received and a plurality of the sensor data are received within a predetermined time, the sensor data having the maximum level is selected. Generating a key code signal corresponding to the sensor data, outputting it in synchronization with the clock signal, and receiving one of the sensor data within the predetermined time after the predetermined time has elapsed. Sometimes a discriminator that outputs a key code signal corresponding to the sensor data is compared with an output from the buffer and an output from the discriminator, and a comparator that outputs the input key code signal only when they match. And is configured.

[0005]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a keyboard device of the present invention. The keyboard device of the present invention detects a pressure applied to or pressed by a plurality of keys corresponding to letters and numbers and a key such as an alphanumeric kana key for a user to input a character string and detects the pressure. Sensor unit 1A that outputs sensor data having a level proportional to the applied pressure
And an input unit that outputs a key code corresponding to the pressed key when the key of the input unit 1 is pressed,
A buffer unit 2 for inputting the above-mentioned key code, temporarily storing it, and sequentially outputting it; a discriminating unit 3 for discriminating the most strongly pressed key from the sensor data sent from the sensor unit 1A and outputting a discrimination signal; The discrimination signal and the output of the buffer unit 2 are compared with each other, and when the two coincide with each other, the comparing unit 4 which outputs the coincident key code signal, and the key code signal sent from the comparing unit 4 are converted into corresponding character data. It is composed of a decoding unit 5. To the output side of the date code unit 5, for example, a display control unit 6 for converting the received character data into a display signal and a display unit 7 for displaying the input character are connected. These display control unit 6 and display unit 7
Is a component of a computer (not shown). The input unit 1 identifies various keys such as an alphabetic key, a numeric key, and a Kana key for a user to input a character string, and a pressed or touched key for each key.
The sensor unit 1A has a sensor unit 1A which detects the pressure of the identified key and outputs a signal having a level proportional to the pressure as the sensor data 102 for each key. When the user presses or touches the key, The key code signal 101 is sent to the buffer section 2 and the sensor data 102 detected by the sensor section 1A is sent to the discrimination section 3 in synchronization with a clock signal applied from the outside. The buffer unit 2 receives the key code signal 101 sent from the input unit 1 and temporarily stores it, and outputs the sequentially stored key code data to the comparison unit 4 by a clock signal applied from the outside. The discrimination unit 3 uses the sensor data 10 sent from the sensor unit 1A.
When 2 is received, the received sensor data 102 is compared for each key, the sensor data of the key having the highest level is selected, the key code signal of the selected key is generated, and the discrimination signal 10
4 to the comparison unit 4. However, the sensor data having the maximum level among the plurality of sensor data is compared when the plurality of data arrives within a predetermined time, and one of the sensor data is compared within the predetermined time described above. When the sensor data comes in, the discrimination unit 3
Generates a key code signal corresponding to this sensor data and outputs it to the comparison unit 4.

The comparing section 4 receives the outputs from the buffer section 1 and the discriminating section 3, compares the two received signals, and only when the two signals match, the received signal is selected as a selected key code signal and the decoding section Output to 5.

When the decoding unit 5 receives the key code data sent from the comparison unit 4, the decoding unit 5 converts the key code data into character code data, and the display control unit 6 receives the character code data 105.
Is sent. The display control unit 6 displays the character code data 105
When receiving the received data, the character generator extracts the character having the corresponding character code and sends it as the display data 106 to the display unit 7. When the display unit 7 receives the display data 106 sent from the display control unit 6 described above, it displays the characters corresponding to the display data on the screen.

FIG. 2 is a flow chart showing the operation of the embodiment of FIG. When the key is pressed (step S1), the key code signal 101 is input to the buffer unit 2 and temporarily stored (step S2). At the same time, the output detected by the key sensor 1A is output as the sensor data 102 to the discrimination unit 3 (step S4). The buffer unit 2 temporarily stores the input key code signal (step S3). When a plurality of input sensor data 102 are received within a predetermined time, the discriminator 3 compares the levels of the plurality of received sensor data 102 and determines the highest level among the plurality of received sensor data. A key code signal corresponding to sensor data having a large level is generated and output to the comparison unit 4 (step S5). If the discriminator 3 receives one sensor data within the predetermined time, the key code signal corresponding to the input sensor data is generated and output to the comparator 4. The comparison unit 4 is the buffer unit 2
And the output signal of the discriminator 3 are compared, and the received signal is output as it is to the decoding unit 5 as a key code signal only when these two match, and the input signal is not output in other cases ( Steps S6 and S7 and S
9). The decoder unit 5 converts the input key code signal into a corresponding character code data and outputs it to the display control unit 6 (step S8). The corresponding characters are displayed on the display unit 7 by the output of the display control unit 6 (step S1).
0). In the embodiment described so far, the sensor unit 1A outputs a signal for each key having a level proportional to the pressure when the key is pressed as the sensor data 102, but instead of the pressing pressure when the key is pressed as described above. It is obvious that a signal that is proportional to the contact area between the key and the finger when the user touches the key and that identifies the touched key may be output as sensor data.

[0009]

As described above, the keyboard device of the present invention is provided with the sensor portion, the discrimination portion, the buffer portion, and the comparison portion, so that the key of the character to be originally input is pressed or touched at the same time by the adjacent key. However, since only the key of the character that should be originally input is processed as valid, it has the effect of reducing erroneous input, and due to erroneous deletion when erasing a character that was input by mistake, This has the effect of reducing the chance of accidentally deleting or destroying the written character string or data.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flow chart illustrating the operation of the embodiment of FIG.

[Explanation of symbols]

 1 Input part 2 Buffer part 3 Discrimination part 4 Comparison part 1A Sensor part

Claims (2)

[Claims] 1. A key code signal, which has a plurality of keys for data input and is pre-assigned individually to each of these keys when the plurality of keys are pressed, is synchronized with an external clock signal. In a keyboard device that outputs as a key, when the plurality of keys are pressed, a sensor unit that individually identifies these keys and generates and outputs sensor data having a level proportional to the pressure when the key is pressed, A buffer unit that receives the key code signal and temporarily stores it, and sequentially outputs the temporarily stored key code signal in a storage order according to the clock signal from the outside; and a sensor unit that receives the sensor data. When multiple data are received within a predetermined time, the sensor data with the maximum level is selected and the key code signal corresponding to the sensor data is selected. When the sensor data is generated and output in synchronization with the clock signal and one sensor data is received within the predetermined time after the predetermined time has elapsed, a key code signal corresponding to the sensor data A keyboard device, comprising: a discriminator that outputs the key code signal; and a comparator that compares the output from the buffer part with the output from the discriminator and outputs the input key code signal only when the two match. .. 2. The keyboard device according to claim 1, wherein when the key is pressed instead of the sensor unit, the key has a level proportional to a contact area between a finger touched by the key and the key. A keyboard device having a sensor unit for outputting sensor data for individually identifying a key.