JPH10198472A - Infrared transmission equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily avoid interference between two sets of proximately arranged infrared transmission equipment for computer by adding any inexpensive device by providing transmission angle controllers, with which the transmission angle of infrared rays can be narrowed, on the front faces of infrared transmitters at respective 1st and 2nd transmission equipment. SOLUTION: The infrared transmission equipment is provided with 1st transmission equipment 5 arranged on a computer 4 and 2nd transmission equipment 6 arranged on a keyboard 1. The respective 1st and 2nd transmission equipment 5 and 6 is provided with infrared transmitters 2 and infrared receivers 3 and further, transmission angle controllers 7 are provided as needed. In any case, the transmission angle controller 7 is provided at any one of 1st and 2nd transmission equipment at least. This transmission angle controller 7 can control the transmission angle of infrared transmitter 2 so that transmission signals from two pairs of infrared transmitters 2 at two sets of adjacent infrared transmission equipment can be mutually separated so as to block the interference between both the transmission equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an infrared transmission device, and more particularly to an infrared transmission device used for communication between a computer and a keyboard.

[0002]

2. Description of the Related Art A keyboard is one of the essential devices for computer applications. However, conventional keyboards are always connected to the computer via wires, which creates an inevitable inconvenience during operation. Wireless keyboards have also been developed and fall into two categories: radio frequency transmission and infrared transmission.

[0003]

Although the radio frequency transmission keyboard has high accuracy, a complicated structure is required.
This leads to a rise in manufacturing costs and an obstacle to assembly. Also, as in an office, when several sets of keyboards and computers are placed close together, interference between the keyboards occurs. The infrared transmission keyboard has the advantages of simple structure and low cost. However, inter-keyboard interference still cannot be prevented from occurring.

An object of the present invention is to make it possible to easily avoid interference between two sets of infrared transmission devices for computers arranged in close proximity by adding relatively inexpensive devices.

[0005]

According to one aspect of the present invention, a fan-shaped spread angle is provided on the front surface of each of the infrared transmitters of the first transmission device disposed on the computer and the second transmission device disposed on the keyboard. The problem can be easily solved by installing a transmission angle adjusting device capable of narrowing the transmission angle of the infrared light transmitted.

According to another aspect of the present invention, the direction in which the transmission device faces between the first or second transmission device and the computer or the keyboard is easily changed with respect to the direction in which the computer or keyboard faces. The problem can be easily solved by interposing a possible transmission direction adjusting device.

[0007]

FIG. 3 illustrates two infrared transmitters 2 respectively arranged on two keyboards 1. Two infrared receivers 3 are arranged on two computers 4 respectively. Each infrared receiver 3
Normally receives a signal from each corresponding infrared transmitter 2. When two pairs of the transmitter 2 and the receiver 3 are arranged close to each other as shown in FIG. 3, the two pairs of the transmitter 2 and the receiver 3 tend to interfere with each other.

Referring to FIG. 1, the infrared transmission device according to the present invention includes a first transmission device 5 disposed on a computer 4 and a second transmission device 6 disposed on a keyboard 1. Each of the first and second transmission devices includes an infrared transmitter 2 and an infrared receiver 3, and further includes a transmission angle adjustment device 7 when necessary. In any case, at least one of the first and second transmission devices is provided with the transmission angle adjusting device 7, but it is desirable that both of them have the transmission angle adjusting device 7 respectively. The transmission angle adjusting device 7 is capable of adjusting the transmission angle of the infrared transmitter 2, and therefore transmits transmission signals from two pairs of infrared transmitters 2 of two adjacent infrared transmission devices between the two transmission devices. It is possible to separate them from each other to prevent interference.

Referring to FIG. 2, the infrared transmission device according to the present invention includes a first transmission device 5 disposed on a computer 4 and a second transmission device 6 disposed on a keyboard 1. Each of the first and second transmission devices includes an infrared transmitter 2 and an infrared receiver 3, and is further disposed between the infrared transmitter 2 and the infrared receiver 3 and the computer 4 or the keyboard 1 when necessary. Transmission direction adjusting device 8
Is provided. In any case, at least one of the first and second transmission devices includes the transmission direction adjustment device 8,
However, it is desirable that both have the transmission direction adjusting device 8 respectively. This transmission direction adjusting device 8 is capable of adjusting the transmission direction of the infrared transmitter 2, and therefore two pairs of infrared transmitters 2 of two adjacent infrared transmitters.
Can be separated from one another to prevent interference between the two transmission devices.

The following are some embodiments of the transmission angle adjusting device according to the present invention.

Since the infrared rays are transmitted from the transmitter to the receiver in a fan shape, the transmission angle adjusting device is arranged at the front of the transmitter so as to reduce the fan-shaped spread angle of the transmitted infrared rays. You. Specific methods include (a) adjusting the arrangement distance from the transmitter, a perforated light-shielding mask, and (b) expandable and contractible to allow light to pass inside to reduce or expand the transmission angle. (C) the use of a combined concave and / or convex lens in which the focal position of the infrared light emitted from the transmitter is variably arranged by adjusting the mutual position.

The following are some embodiments of the transmission direction adjusting device according to the present invention.

Since the infrared rays are transmitted in a fan shape from the oscillator to the receiver, the direction in which the first transmission device or the second transmission device faces and the direction in which the computer or the keyboard faces can be relatively changed. For example, it is possible to adjust transmission signals from two pairs of infrared transmitters 2 of two adjacent infrared transmission devices so as not to reach the infrared receiver 3 on the partner transmission device side. Specific examples of the transmission direction adjusting device arranged between the first transmission device or the second transmission device and the computer or the keyboard to adjust the facing direction of the first transmission device or the second transmission device include: (a) a rigid body; Composed ball-sphere or hemisphere having joint function,
(B) a flexible pipe support made of a material such as a plastic pipe, and (c) a multiple joint.

By means of the embodiment of the present invention, the transmission angle and the direction of the infrared transmitter can be appropriately adjusted to suit the actual situation of the application place.

Although the invention has been described with reference to a preferred embodiment, it will be understood that many other modifications may be made without departing from the scope and spirit of the invention.

[0016]

By arranging a transmission angle adjusting device for reducing the fan-shaped spread angle of infrared rays emitted from the front of the infrared transmitter, mutual interference avoidance adjustment between two adjacently arranged infrared transmitting devices can be easily performed. Now you can. By arranging the transmission direction adjusting device between the infrared transmission device and the computer or keyboard on which the infrared transmission device is mounted, mutual interference avoidance adjustment between two adjacent infrared transmission devices can be easily performed. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of two sets of infrared transmission apparatuses which are provided close to each other and have a transmission angle adjusting apparatus according to the present invention.

FIG. 2 is an explanatory view of two sets of infrared transmission devices arranged in close proximity with each other and having a transmission direction adjusting device according to the present invention.

FIG. 3 is an explanatory view of mutual interference of infrared rays emitted from two sets of infrared transmitters arranged on a keyboard arranged close to each other near an infrared receiver on two sets of computers arranged close to each other.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Keyboard 2 Infrared transmitter 3 Infrared receiver 4 Computer 5 First transmission device 6 Second transmission device 7 Transmission angle adjustment device 8 Transmission direction adjustment device

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI H04B 10/22

Claims (10)

[Claims] 1. A first transmission device having an infrared transmitter and a receiver arranged on a computer, a second transmission device having an infrared transmitter and a receiver arranged on a keyboard, and at least one infrared light An infrared transmission device, comprising a transmission angle adjusting device on a front surface of a transmitter for narrowing a fan-shaped spread angle of transmitted infrared light. 2. The infrared transmission device according to claim 1, wherein said transmission angle adjusting device is a light-shielding mask provided with holes. 3. The infrared transmission device according to claim 1, wherein said transmission angle adjusting device is a telescopic sleeve. 4. The infrared transmission device according to claim 1, wherein said transmission angle adjusting device is a concave lens. 5. The infrared transmission device according to claim 1, wherein the transmission angle adjusting device is a convex lens. 6. A first transmission device having an infrared transmitter and a receiver arranged on a computer, a second transmission device having an infrared transmitter and a receiver arranged on a keyboard, and at least one transmission. An infrared transmission device comprising a transmission direction adjusting device between the device and a computer or a keyboard, the transmission direction adjusting device being capable of moving the transmission device facing direction from the computer or keyboard facing direction. 7. The infrared transmission device according to claim 6, wherein the transmission direction adjusting device is a spherical body. 8. The infrared transmission device according to claim 6, wherein said transmission direction adjusting device is a hemispherical body. 9. The infrared transmission device according to claim 6, wherein said transmission direction adjusting device is a flexible pipe support. 10. The transmission direction adjusting device according to claim 8, wherein
7. The infrared transmission device according to claim 6, wherein the infrared transmission device is a joint.