JPH1027057A - Wireless keyboard system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless keyboard system which can communicates with a plurality of central processing units without confusion through simple operation by using only one wireless keyboard. SOLUTION: At the time of setting the correspondence relation between a central processing unit 11 and wireless keyboard 1, a keyboard connection designating switch 12 is pressed. When the switch 12 is pressed, an infrared transmitting-receiving section 15 transmits an optical signal composed of infrared rays by using a random number generated from a random number generating section 13 as an ID code. The keyboard 1 initializes and stores the ID code so far held by the section 15 when the section 15 receives the optical signal and the key information inputted from the key input section 3 of the keyboard 1 is transmitted from another infrared transmitting-receiving section 2 after the ID code is added to each input. Upon receiving the key information together with the added ID code, the unit 11 identifies the added ID code and, only when the added ID code is coincident with its own ID code, inputs the key information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a wireless keyboard system, and more particularly to a wireless keyboard system for communicating with a plurality of central processing units by infrared rays or wireless communication.

[0002]

2. Description of the Related Art In a conventional wireless keyboard system, for example, a wireless keyboard system disclosed in Japanese Utility Model Application Laid-Open No. 60-123032 discloses a central processing unit and a wireless communication system using a predetermined code. A correspondence relationship between keyboards is determined, and a plurality of central processing units and a wireless keyboard that face each other one by one can be used.

[0003]

A first problem of the prior art is that normal communication cannot be performed if the correspondence between the central processing unit and the wireless keyboard is not unique. The reason is that in the wireless keyboard of the prior art, a unique code must be determined and set in advance, and a problem arises when this code is erroneously set.

[0004] The second problem is that it is not possible to communicate with a plurality of central processing units with one keyboard because the central processing unit and the keyboard must correspond one-to-one.

[0005] A third problem is that as the number of central processing units increases, the number of wireless keyboards also increases, and their management becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a wireless keyboard system that can communicate with a plurality of central processing units without confusion by a simple operation using one wireless keyboard.

[0007]

A wireless keyboard system according to the present invention is a wireless keyboard system in which a wireless keyboard and a plurality of central processing units transmit signals via a spatially propagated signal. And an airborne signal transmitting and receiving unit, wherein the central processing unit has a keyboard connection instruction switch,
The central processing unit includes an ID code generation unit, a keyboard control unit, and an airborne signal transmission / reception unit. When a connection instruction for a designated keyboard is input from a connection instruction switch, the central processing unit generates an ID code. The ID code is transmitted to the designated wireless keyboard via the keyboard control unit and the aerial propagation signal transmission / reception unit to establish the correspondence, and the received wireless keyboard stores the ID code. When transmitting the key information, the central processing unit, which transmits the key information with the ID code attached thereto from the airborne signal transmitting and receiving unit and receives the key information with the ID code, identifies the ID signal included in the signal, and identifies its own unique signal. Enter only the key information that matches the ID code.

Preferably, the ID code generator has a random number generating function, and the unique ID code is a random number generated by the ID code generator when a connection command is issued from the connection instruction switch.

Further, the airborne signal may be an optical signal using infrared rays or a radio signal.

Each central processing unit is provided with a unique ID code, the unique ID code is transmitted to a wireless keyboard to be communicated each time, and the message is transmitted as a unique ID code to be associated with the target central processing unit. By always setting the number in the central processing unit, it is possible to distinguish that the other central processing unit and the wireless keyboard are not related to the own device, and it is possible to arbitrarily combine a plurality of central processing units and a plurality of wireless keyboards.

The ID code for establishing the correspondence is
It is automatically set without the need to manually input each time.

The ID code generator of the central processing unit is provided with a random number generation function, and by using the generated random numbers, it is not necessary to set a unique code each time. The keyboard allows communication with a plurality of central processing units, eliminating the need to manage codes.

[0013]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the functions of a wireless keyboard according to the present invention and a keyboard input unit of a central processing unit corresponding thereto. In the figure, 1 is a wireless keyboard, 2 is an infrared transmitting / receiving section of the wireless keyboard, 3 is a keyboard input section, 11
Is a central processing unit, 12 is a keyboard connection instruction switch,
13 is a random number generator, 14 is a keyboard controller, and 15 is an infrared transmitter / receiver of the central processing unit.

The central processing unit 11 includes a keyboard connection instruction switch 12, a random number generator 13, and a keyboard controller 1.
4. There is an infrared transmitting / receiving unit 15. First, the central processing unit 1
When setting the correspondence between the wireless keyboard 1 and the wireless keyboard 1, the wireless keyboard 1 is placed at a predetermined position where infrared light from the infrared transmitting / receiving unit 15 of the central processing unit 11 can be received, and the keyboard connection instruction switch 12 is pressed. As a result, the random number generator 13 generates a random number as an ID code, the keyboard controller 14 issues a keyboard connection request to which the ID code is added, and the infrared transmitter / receiver 15 emits light as an optical signal using infrared light. Upon receiving this, the wireless keyboard 1 placed at a predetermined position initializes the ID code held so far, stores this ID code, and sends the same ID code from the infrared transmitting / receiving unit 2 to the central processing unit 11. The corresponding relationship is established by returning to the infrared transmission / reception unit 15.

After that, the key information input from the key input unit 3 of the wireless keyboard 1 is transmitted from the infrared transmitting / receiving unit 2 with an ID code added for each input. The central processing unit that has received the key information to which the ID code has been added,
The key information is input only when the added ID code is identified and coincides with the own ID code. Therefore, even if the central processing unit having no correspondence has received the key information to which the ID code is added, the key information is not input.

FIG. 2 is a block diagram showing a case where a plurality of central processing units of the present invention are controlled by a single wireless keyboard.
Are the central processing units # 1 and 102 are the central processing units # 2 and
3 is a central processing unit # 3, 101a, 102a, 103a
Are keyboard connection instruction switches.

FIG. 1 shows an example of three central processing units # 1 to # 3 101 to 103 and one wireless keyboard 1. Now, the central processing unit # 2 of 102
And the wireless keyboard 1 are connected. In this case, the wireless keyboard 1 is placed at a predetermined position where infrared rays from the infrared transmitting / receiving unit of the central processing unit # 2 can be received, and the keyboard connection instruction switch 102a of the central processing unit # 2 of 102 is pressed to thereby execute the central processing of 102. Device # 2 and wireless keyboard 1 are connected. 10
The central processing units # 1 and # 3 of Nos. 1 and 103 receive communication of a keyboard input from the wireless keyboard 1,
Since the ID code does not match, it is determined that the input is not an input made to the own device.

Further, in order to complete the input to the central processing unit # 2 at 102 and to switch to the input to the central processing unit # 3 at 103, the wireless keyboard 1 is connected to the infrared transmitting / receiving unit of the central processing unit # 3 at 103. By pressing the keyboard connection instruction switch 103a of the central processing unit # 3 of 103 at a predetermined position capable of receiving infrared rays from
The existing ID code of the wireless keyboard 1 is initialized, and communication with the central processing unit # 3 is performed by using the newly generated ID code.

In the above description, the ID code is created by using a random number generated by the random number generator. However, unless a duplicate ID code is used, a unique ID provided in each central processing unit is used. Even if a cord is used, the object of the present invention that one wireless cord can correspond to a plurality of central processing units can be achieved. However, using a random number eliminates the possibility of setting an ID code redundantly, and has the effect of eliminating the need to manage the ID code itself.

Although the spatial propagation signal used has been described as an optical signal using infrared rays, the object of the present invention can be achieved even if the signal is a radio wave signal or an ultrasonic signal.

[0021]

As described above, the first effect of the present invention is that the wireless keyboard itself does not have a unique code, so that one wireless keyboard can easily and reliably connect to a plurality of central processing units. This means that even a large number of central processing units can be handled with a small number of wireless keyboards, so that the equipment can be simplified. Further, when establishing the correspondence between the central processing unit and the wireless keyboard, no manual input of the ID code is required, so that there is no possibility of confusion due to erroneous input.

A second effect is that there is no malfunction due to duplication of the ID code because the ID code is generated each time by a random number.

The third effect is that the ID code is generated each time by a random number, so that the unique ID code is not fixed, and even if there are a large number of central processing units and wireless keyboards, the respective relations can be established. There is no need to manage.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the functions of a wireless keyboard according to the present invention and a keyboard input unit of a central processing unit corresponding thereto.

FIG. 2 is a block diagram showing a case where a plurality of central processing units of the present invention are controlled by one wireless keyboard.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wireless keyboard 2 Infrared transmitting / receiving part 3 Keyboard input part 11 Central processing unit 12 Keyboard connection indication switch 13 Random number generation part 14 Keyboard control part 15 Infrared transmitting / receiving part 101 Central processing unit # 1 102 Central processing unit # 2 103 Central processing unit # 3

Claims (4)

[Claims] 1. A wireless keyboard system in which a wireless keyboard and a plurality of central processing units transmit signals via a spatially propagated signal, wherein the wireless keyboard includes a keyboard input unit and an airborne signal transmitting / receiving unit, The central processing unit includes a keyboard connection instruction switch,
An ID code generation unit, a keyboard control unit, and an airborne signal transmission / reception unit, wherein the central processing unit, when a connection instruction for a designated keyboard is input from the connection instruction switch, generates a unique ID code. The ID code generator generates the ID code, transmits the ID code to the designated wireless keyboard via the keyboard controller and the airborne signal transmitter / receiver, establishes the correspondence, and receives the received wireless. The keyboard stores the ID code, transmits the key information with the ID code, transmits the signal from the airborne signal transmission / reception unit, and receives the key information with the ID code. Identifying only the key information that matches the ID code of its own,
Wireless keyboard system characterized by the following. 2. The method according to claim 1, wherein the ID code generation unit has a random number generation function, and the unique ID code is a random number generated by the ID code generation unit when a connection command is issued from the connection instruction switch. The described wireless keyboard method. 3. The wireless keyboard system according to claim 1, wherein the airborne signal is an optical signal using infrared light. 4. The airborne signal is a radio signal.
The wireless keyboard system according to claim 1 or 2.