JP2003332924A - Radio apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio apparatus that can output a use state of a plurality of radio channels. <P>SOLUTION: The radio apparatus (5) receives a radio signal outputted by pieces of radio input apparatus (3, 4), outputs information contained in the radio signal to an information processing apparatus body (1), and has means (8, S1 to S6) for detecting the use state of each radio channel and outputting a signal indicating the use state of each channel to the information processing apparatus body. Outputting a signal for indicating the usage of each radio channel to the information processing apparatus body provides a user with the usage/non-usage of each radio channel without increasing the circuit scale of the radio apparatus. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device such as a personal computer, and more particularly to an information input device such as a keyboard or a mouse having a wireless structure and a wireless signal output from this wireless input device. The present invention relates to a wireless device that outputs information included in the information processing device to an information processing device.

[0002]

2. Description of the Related Art FIG. 1 is a diagram showing an information processing apparatus.
This information processing apparatus has an information processing apparatus main body 1, a display 2, a wireless keyboard 3, a wireless mouse 4, and a radio receiver 5. The wireless receiver 5 receives a wireless signal transmitted by the wireless keyboard 3 and the wireless mouse 4, and receives information such as coordinate input information included in the wireless signal via the cable 10 from the information processing device body 1
Output to. A plurality of radio channels are prepared between the radio receiver 5 and the wireless keyboard 3 and between the radio receiver 5 and the wireless mouse 4. If a plurality of devices shown in FIG. 1 are installed close to each other, it is necessary to use different radio channels in order to avoid interference. Usually, the wireless channel setting is fixed. Therefore, for example, when installing a new information processing apparatus, it is necessary to set an unused wireless channel other than the already set wireless channel.

[0003]

However, the management of such a radio channel is complicated. Once it becomes unclear which wireless channel is already used, it is necessary to check the wireless channel settings of all the information processing devices one by one. In particular, the wireless channel setting management must be updated every time an information processing device is added or removed, and this work is very complicated. Further, even when the radio wave condition is bad and the radio receiver 5 cannot correctly receive the radio signal, the radio channel cannot be easily changed.

A technique for checking the status of the wireless channel is described in, for example, Japanese Patent Application No. 5-108220. The publication describes a technique in which a check signal is transmitted from a wireless keyboard to a personal computer body, the strength of the reception level of the check signal is determined by the personal computer body, and the determination result is displayed on a display means. However, the reception level check described in the above publication does not judge whether the wireless channel is in use, but
It adjusts the positional relationship between the PC and the wireless keyboard depending on the strength of the reception level so that the proper transmission path can be secured quickly, and it is not possible to judge whether the wireless channel is in use or not. Can not. Further, since the above publication does not describe a plurality of wireless channels, it cannot be applied to the configuration shown in FIG.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a radio apparatus capable of outputting the usage status of a plurality of radio channels.

Another object of the present invention is to provide a wireless device which is not easily affected by the surrounding environment.

[0007]

According to a first aspect of the present invention, there is provided a radio which receives a radio signal output from a radio input device and outputs information contained in the radio signal to an information processing device main body. The wireless device is characterized by including means for detecting the usage status of each wireless channel and outputting a signal indicating the usage status of each wireless channel to the information processing apparatus main body. Since such means is provided in the wireless device (the wireless device 5 described later is an embodiment of this means), the information processing device main body can grasp the usage status of each wireless channel. Therefore, by displaying each wireless channel on a display or the like connected to the main body of the information processing apparatus, the user can easily know the used / unused status of each wireless channel. By outputting a signal indicating the usage status of each wireless channel to the information processing device main body,
It is possible to provide the user with the usage / non-use status of each wireless channel without increasing the circuit scale of the wireless device.

[0008] For example, the means is to judge whether each radio channel is in use or unused by comparing the reception intensity of each radio channel with a predetermined threshold value.

Further, the means compares, for example, the reception intensity of each radio channel with a threshold value corresponding to an average value of the maximum value and the minimum value of the reception intensity, and the reception intensity is equal to the threshold voltage. In the following cases, it is determined that the wireless channel is unused.

The wireless device has, for example, a non-volatile memory, and has a reception strength for each radio channel, a threshold reception strength for judging whether each radio channel is in use or not, and use of the radio channel. This is a configuration for storing an ID for identifying a person.

The means, for example, receives an instruction from the main body of the information processing apparatus and starts an operation of detecting the use state of the wireless channel.

[0012] For example, the means receives an instruction from the wireless input device, and starts an operation of detecting the use status of the wireless channel.

The wireless input device has, for example, means for selecting a wireless channel.

The wireless input device has, for example, a receiving unit for receiving a wireless signal from a mouse, and a transmitting unit for transmitting a signal corresponding to a key operation and a wireless signal from the mouse to the wireless device.

The wireless input device has, for example, means for indicating that the antenna matching is deviated due to the environment and the transmission power is reduced, and means for manually adjusting the antenna matching.

According to a tenth aspect of the present invention, in a radio apparatus for transmitting a radio signal, first means for displaying that the antenna matching is deviated due to the environment and the transmission power is reduced, and manually. And a second means for adjusting antenna matching. Since the antenna matching can be manually adjusted according to the environment, it is possible to realize a wireless device that is not easily affected by the environment with a simple configuration.

The first means has, for example, a light emitting element,
The display of the light emitting element changes as the transmission power decreases.

The second means includes, for example, a variable capacitance circuit coupled to the antenna.

The second means includes, for example, a capacitance variable circuit coupled to the antenna and a switch for externally controlling the capacitance of the capacitance variable circuit.

Further, according to the present invention, in a wireless device having a keyboard function, a plurality of antennas are provided, a wireless signal from a wireless mouse is received via the plurality of antennas, and a cable is provided. The wireless device outputs the information in the wireless signal to the information processing device main body via the. Since a plurality of antennas are provided on the keyboard to receive a radio signal from the wireless mouse, it is possible to realize a wireless device that is not easily affected by the surrounding environment such as the distance between the wireless mouse and the wireless device.

In the above configuration, for example, each of the plurality of antennas has a receiving section and performs diversity reception.

Further, in the above configuration, for example, the plurality of antennas have a common receiving unit, and the receiving unit selects the antenna having the highest reception intensity from the plurality of antennas.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

(First Embodiment) FIG. 2 is a block diagram showing the configuration of a radio apparatus according to the first embodiment of the present invention.
The wireless device shown is a device corresponding to the wireless receiver 5 shown in FIG. Hereinafter, the wireless device shown in FIG. 2 is referred to as a wireless receiver 5. The wireless receiver 5 has an antenna 6, a receiving module 7, an MCU (micro controller unit) 8, and a wireless channel setting switch (SW) 11. The reception module 7 can receive and process a radio signal transmitted via a plurality of preset radio channels. These radio signals are radio signals from the wireless keyboard and radio signals from the wireless mouse. The keyboard data and mouse data obtained by the reception processing are output from the reception module 7 to the MCU 8.
In addition, the reception module 7 receives the reception strength (RSSI: Received Signal Str) for each radio channel.
The length indicator) can be detected and output. The wireless channel to be detected is designated by the MCU 8. The MCU 8 uses the internal A / D converter 9 to generate a voltage indicating reception strength (hereinafter referred to as reception strength voltage).
Is converted into a digital value to determine the usage status of each wireless channel. The wireless channel setting switch 11 is used to select the receiving module 7 from among a plurality of preset wireless channels.
Is for selecting and designating a wireless channel to be received. The wireless receiver 5 is connected to the information processing device body 1 via a cable 10 such as a USB cable.

FIG. 3 is a flow chart of a program describing the processing for determining the usage status of the radio channel (CH). The process shown in this flowchart is
The MCU 8 shown in FIG. 2 executes continuously or periodically, or in response to an instruction from the information processing apparatus body 1. MC
After starting the operation, U8 sets the wireless channel to be checked in the receiving module 7 (step S1). The reception module 7 measures the reception intensity of the set wireless channel and outputs the reception intensity voltage to the MCU 8. MCU8
Receives this reception intensity voltage (step S2). Then, the MCU 8 determines whether the received reception strength voltage is higher than a predetermined threshold value (step S3). The threshold value is a value that can reliably detect the range of the reception strength voltage that can be observed in the wireless channel in use. Further, it may be a threshold value considering the disturbance noise. By setting an appropriate threshold value that can detect disturbance noise, it is possible to avoid the use of a radio channel having disturbance noise. The threshold value can be arbitrarily set by the operator in advance through experiments or simulations. For example, by transmitting a signal for setting a desired threshold value from the wireless keyboard to the information processing device body 1, the information processing device body 1 can instruct the MCU 8 to set / change the threshold value.

If the decision result in the step S3 is YES, the MCU 8 outputs a signal indicating that the wireless channel is unused to the information processing device body 1 (step S4). On the other hand, if the decision result in the step S3 is NO, the MCU 8 outputs a signal indicating that the wireless channel is in use to the information processing device body 1 (step S5). Then, the MCU 8 specifies the next wireless channel (step S6) and returns to step S1. MCU
8 repeats steps S1 to S6 to determine the status of all wireless channels.

FIG. 4 shows a radio channel usage status screen displayed on the display 2 shown in FIG. This screen is created by the information processing apparatus main body 1 processing the data transmitted from the wireless receiver 5 in steps S4 and S5 of FIG. In the illustrated example, there are 12 radio channels in total. The screen displays the usage status of each wireless channel. For example, radio channels CH2, CH
3, CH4, CH9 and CH10 have been shown to be in use. In this case, for example, CH3 and CH4 are used by the wireless keyboard 3 and wireless mouse 4 of the information processing apparatus, and CH9 and CH10 are channels used by the nearby information processing apparatus. A flag may be displayed adjacent to the channel number on the wireless channel being used by the information processing apparatus. Further, on the screen shown in FIG. 4, the measured value of the reception intensity voltage is also displayed. By displaying the measured value of the reception strength voltage in addition to the display of "empty" or "in use", the operator can know the status of the wireless channel in more detail. Instead of displaying "empty" or "in use", the measured value of the received intensity voltage may be displayed.

The user can set or change the wireless channel to be used by looking at the usage status of the wireless channel shown in FIG. FIG. 5A is a front view of a configuration example of the switch 11 incorporated in the wireless receiver 5. The illustrated switch 11 is a DIP switch having four operation units 1 to 4. When the operation units 1 to 4 are pushed down in the vertical direction, the corresponding contacts are turned on. 16 wireless channels can be designated by a combination of the four operation units 1 to 4. The relationship between the states of the operation units 1 to 4 and the corresponding wireless channels is shown in FIG. FIG. 5B is a plan view of another type of DIP switch. Operation unit 1 of FIG.
4 slides vertically, whereas FIG. 5B slides horizontally. The relationship between the operation units 1 to 4 and the corresponding wireless channel is as shown in FIG.

FIG. 6A is a perspective view of the wireless keyboard 3 shown in FIG. 1 viewed from the bottom. Rubber push 2
For example, a slide switch shown in FIG. 5B is provided in the recess into which 1 is inserted. This slide switch is connected to a control unit formed of an internal MCU or the like. FIG. 6B is a bottom view of the wireless mouse 4 shown in FIG. A trackball 23, an optical sensor 23 having a trackball function, and a battery cover 22 are provided on the bottom surface of the wireless mouse 4. A slide switch shown in, for example, FIG. 5A is provided in the recess covered with the battery cover 22. This slide switch is connected to a control unit formed of an internal MCU or the like. FIG. 6C is a bottom view of the wireless receiver 5 shown in FIG. On the bottom of the wireless receiver 5, a rubber push 24
Is provided. A slide switch 11 shown in FIG. 5A, for example, is provided in the recess into which the rubber push 24 is inserted.

The screen display shown in FIG. 4 may be displayed on the screen as one window constantly or periodically under the control of the information processing apparatus main body 1, or may be displayed as necessary. . When displaying as needed, for example, the function of screen display / erasure may be assigned to a function key or the like, or the screen display / erasure command may be defined by a combination of a plurality of keys.

The communication system between the wireless keyboard 3 and the wireless mouse 4 and the wireless receiver 5 is FSK (Fre
frequency Shift Keying), PSK
(Phase Shift Keying), SS (S
pread Spectrum) or the like can be used. In this embodiment, since the reception strength is measured, the AS
K (Amplitude Shift Keying)
Is not preferable.

As described above, the radio receiver 5 according to the first embodiment of the present invention has the following effects. Since the means (MCU 8 and the program shown in the flow chart of FIG. 3) for detecting the usage status of each wireless channel and outputting a signal indicating the usage status of each channel to the information processing apparatus main body is provided, it is used / not used for each wireless channel. Use can be confirmed at a glance. This makes it possible to easily set / change the wireless channel. For example, there is noise in the currently used wireless channel,
In a situation where misrecognition of data occurs, the current wireless channel can be changed to an unused wireless channel. Since this change is displayed on the display 2 of each nearby information processing device, another operator can easily confirm that the changed wireless channel is in use (or is in use). it can. In addition, it is possible to easily predict a wireless channel in which interference may occur and avoid the expected wireless channel and set the wireless channel. In addition, for the addition and removal of information processing equipment,
No special radio channel management is required since the available radio channels can be easily known. Further, even if all the wireless channels are assigned to each information processing device, if there is an information processing device that is not used due to power-off or the like, the wireless assigned to this information processing device Since it is easy for another information processing apparatus to know that the channel is unused, it is possible to easily use the unused wireless channel within a limited time. That is, it is possible to effectively use the limited wireless channel effectively. The above effects are
Since the signal indicating the usage status of each wireless channel is output to the information processing apparatus main body, it can be obtained without increasing the circuit scale of the wireless apparatus.

Instead of displaying the use status of each wireless channel on the display 2, it is also possible to display it on a print output means such as a printer.

(Second Embodiment) FIG. 7 is a block diagram showing a communication apparatus according to the second embodiment of the present invention. In the figure,
The same components as those shown in FIG. 2 are designated by the same reference numerals. In the present embodiment, a memory 12 is added to the configuration shown in FIG. The memory 12 may be connected to the MCU 8 via a signal line 13 such as a USB cable. The memory 12 stores the measured reception strength voltage value of each wireless channel, and the past maximum and minimum values.
The memory 12 is formed by a non-volatile memory such as an EEPROM or a flash memory.

FIG. 8 is a flow chart showing a program describing the processing for determining the usage status of the radio channel (CH). This program is MC
U8 executes. Steps S11 and S12 of FIG. 8 are the same as steps S1 and S2 of FIG. 3, respectively. MCU
8 stores the received intensity voltage detected in step S12 in the memory 12 shown in FIG. The memory 12 is designed to store a predetermined number of received intensity voltages. In step S14, the MCU 8 calculates the average value of the maximum value and the minimum value of the reception intensity voltage stored in the memory 12, and compares this average value with the reception intensity voltage as the threshold value Vt. Step S15 or S16 is executed according to the determination result. Steps S15 and S16 respectively correspond to step S4 in FIG.
And S5. Then, step S17 similar to step S6 of FIG. 3 is executed, and the process returns to step S11.

In step S14, the average value of the maximum value and the minimum value of the reception intensity voltage stored in the memory 12 is calculated, and the average value is set as the threshold value Vt. Therefore, the status of each channel is monitored for a certain period of time. Therefore, it is possible to more accurately determine whether each radio channel is in use or not in use. In addition, instead of the configuration of calculating the average value of the maximum value and the minimum value of the reception intensity voltage stored in the memory 12, the memory 1
It is also possible to calculate the average value of all the received intensity voltages stored in 2 and use this as the threshold value Vt.

The ID for identifying the user of each wireless channel can be stored in the memory 12 together with the corresponding wireless channel. This ID is included in the radio signal transmitted by the wireless keyboard 3 or the wireless mouse 4. Upon receiving the wireless signal, the MCU 8 of the wireless receiver 5 detects the ID in the wireless signal. FIG. 9 shows an example in which the user ID is displayed on the screen. The ID of the user is displayed on each wireless channel in use. Radio channel CH
No user ID is displayed at 9. This means that although the radio channel CH9 is in use, a noise level exceeding the threshold value Vt exists in the radio channel CH9 and is not actually used. In this way, by displaying the user ID, the relationship between the user and the wireless channel used can be known, and management when using a plurality of information processing devices is easy.

(Third Embodiment) Next, a third embodiment of the present invention will be described. The present embodiment is a wireless input device such as the wireless keyboard 3 and the wireless mouse 4 described above. As a method of making such a wireless input device wireless, a radio wave type and an infrared type have been developed, and among them, the radio wave type, which has a high degree of freedom in input, is often used. In the radio-type wireless input device, the radio waves wrap around and are reflected even when an object is present in the surroundings, and reach the radio receiving device 5. However, the transmission power decreases due to the shift of the antenna matching of the transmission depending on the environment, which may affect the communication distance or cause a communication error.

FIG. 10 (A) shows the antenna voltage amplitude V1 when the wireless input device is placed on a wooden desk, and FIG. 10 (B) is when it is placed on a steel desk. The antenna voltage amplitude V2 is shown. Due to the influence of the steel desk, the antenna matching deviates from the optimum value, and the antenna voltage amplitude is smaller than when used on a wooden desk (V1> V2). When the antenna voltage amplitude is small, the transmission power also becomes small and the reception intensity voltage detected by the wireless receiver 5 also becomes small.
In this case, the accuracy of comparison between the reception intensity voltage and the threshold value Vt performed in the first and second embodiments may be deteriorated. The present embodiment is a wireless device (wireless input device) having a function of displaying that antenna matching is deviated due to the environment and transmission power is reduced, and manually adjusting antenna matching.

FIG. 11 is a diagram showing an internal circuit of the wireless keyboard 3 or the wireless mouse 4. The internal circuit includes the MCU 31, the transmitter 32, the antenna matching circuit 33, the antenna 34, the comparator 35, and the LED (Light).
-Emitting Diode) 36, diode D
1, having resistors R1 to R3. The antenna matching circuit 33 has capacitors C1 and C5 of fixed capacitance and a capacitor C2 of variable capacitance. The MCU 31 receives an input signal from a switch or a sensor which works in conjunction with a mechanical unit of a keyboard or a mouse. Further, the MCU 31 is the above-mentioned first
And the wireless channel settings used in the second embodiment.
The wireless channel selection signal from the toggle switch for change is received. The transmitter 32 modulates the input signal and transmits it via the antenna matching circuit 33 and the antenna 34. The output (antenna voltage amplitude) of the antenna matching circuit 33 is connected to one input terminal of the comparator 35 via the resistor R3. The other input terminal of the comparator 35 is
A reference voltage obtained by dividing the power supply voltage Vcc by the resistors R1 and R2 is given. When the antenna voltage amplitude falls below the reference voltage, the MCU 31 turns on or off the LED 36. The user who sees this adjusts the capacitance of the variable capacitor C2 to turn off or turn on the LED 36. Thereby, the antenna matching can be adjusted appropriately.

The LED 36 is an LCD (Liquid Cr).
The Yeast Display) may be used. In this case, the difference between the antenna voltage amplitude and the reference voltage is displayed as it is or by replacing it with an appropriate numerical value or the like.
Thereby, the antenna matching can be adjusted more accurately.

FIG. 12 is a diagram showing a wireless mouse 4 having the internal circuit shown in FIG. 12A is a plan view, FIG. 12B is a side view, FIG. 12C is a bottom view, and FIG. 12D is a front view. The wireless mouse 4 has a left switch 51, a right switch 52, a wheel 53, and an LED 36.
The LED 36 is mounted in a position where it is not covered by the hand when using the wireless mouse. As described above, a toggle switch for selecting a wireless channel is provided inside the battery cover 22. Further, the capacity of the variable capacitor C2 of the antenna matching circuit 33 can be adjusted by using, for example, a knob or a screw-shaped adjusting member provided inside the battery cover 22.

Instead of the antenna matching circuit 33, the antenna matching circuit 33A shown in FIG. 13 can be used. The antenna matching circuit 3A includes three fixed capacitors C1, C3 and C4 and two switches SW1 and SW2. Switches SW1 and SW
2 each selectively connect capacitors C3 and C4 to capacitor C1. The switches SW1 and SW2 are shown in FIG.
It can be formed by the dip switch shown in (A) and (B). This DIP switch is shown in FIG.
It is provided in the wireless mouse body covered with the battery cover 22 of (C).

According to the third embodiment described above, a means (LED 36) for displaying that the antenna matching is shifted due to the environment and the transmission power is reduced, and a means (33, 33A) for manually adjusting the antenna matching. With such a configuration, it is possible to prevent a decrease in transmission power due to the influence of the environment, secure a sufficient communication distance, and suppress the occurrence of communication errors. Moreover, since the antenna matching is manually adjusted, the antenna matching circuits 33 and 33A can be realized with a simple configuration.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described. In this embodiment, the keyboard is provided with a circuit for receiving a radio signal transmitted by the wireless mouse, and the keyboard is connected to the information processing apparatus main body 1 or the radio receiver 5 by a cable. Further, the keyboard has a configuration capable of highly reliably receiving the radio signal transmitted by the wireless mouse even if the environment of use is poor.

FIG. 14 is a diagram showing the structure of an information processing apparatus including a keyboard according to the fourth embodiment of the present invention. The keyboard 3A is, for example, a signal line 61 such as a USB cable.
It is connected to the information processing apparatus main body 1 via. The radio signal transmitted by the wireless mouse 4 is received by the keyboard 3A and transferred to the information processing apparatus main body 1 via the signal line 61. The keyboard 3A having such a receiving function,
It is a wireless device having a keyboard function.

FIG. 15 is a diagram showing a receiving system provided in the keyboard 3A. The illustrated receiving system includes three antennas 62 to 64, three receiving units 65 to 67, and a combining unit 68.
Have. FIG. 16 shows the arrangement of this receiving system. The antennas 62 and 64 are arranged along the short-side end of the keyboard 3A, respectively, and the corresponding receivers 65 and 67 are arranged near the antennas 62 and 64. Antenna 63
Are arranged along the longitudinal end of the keyboard 3A, and the corresponding receivers 66 are arranged in the vicinity thereof. The antennas 62 to 64 and the receiving units 65 to 67 realize diversity reception. The reception signals output by the receiving units 65 to 67 are combined by the combining unit 68 and output to the MCU of the keyboard 3A (corresponding to the MCU 31 of FIGS. 11 and 14). Since diversity reception is adopted in this way, regardless of the positional relationship between the keyboard 3A and the wireless mouse 4,
A stable reception operation becomes possible. As a result, it is difficult for the cursor to jump or to be inoperative, and the reliability of communication can be improved.

Although the keyboard 3A is connected to the information processing apparatus main body 1 in the above embodiment, it may be connected to the wireless receiver 5 shown in FIG. The wireless receiver 5 includes, for example, a USB connector, and is connected to the keyboard 3A with a USB cable.

(Fifth Embodiment) FIG. 17 shows the fifth embodiment of the present invention.
It is a block diagram which shows the receiving system of the keyboard by embodiment. FIG. 18 is a plan view of this keyboard.
The receiving system of this embodiment includes three antennas 62 to 64,
It has one receiver 69 common to these. The arrangement of the antennas 62 to 64 is similar to that shown in FIG.
The receiving unit 69 selects the antenna having the highest reception intensity level from the three antennas 62 to 64 and outputs the radio signal received by the selected antenna to the MCU. The keyboard configured as described above can stably perform the receiving operation regardless of the positional relationship between the keyboard 3A and the wireless mouse 4.

The embodiments of the present invention have been described above. The present invention is not limited to the above-described embodiment, but includes modifications of the above-described embodiment and other embodiments.

[0051]

As described above, according to the present invention,
A wireless device that can output the usage status of a plurality of wireless channels and a wireless device that is less likely to be affected by the surrounding environment can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a configuration example of an information processing device.

FIG. 2 is a block diagram of a wireless device (wireless receiver) according to the first embodiment of the present invention.

FIG. 3 is an operation flowchart of the MCU shown in FIG.

FIG. 4 is a diagram showing an example of wireless channel usage status displayed on a display.

5A and 5B are DIP switches (A) and (B) for setting / changing a wireless channel, and FIG. 5C is a diagram showing a relationship between the wireless channel and the setting of the switch.

FIG. 6 is a diagram showing a wireless keyboard (A), a wireless mouse (B), and a wireless receiver (C) having a DIP switch.

FIG. 7 is a block diagram of a wireless device (wireless receiver) according to a second embodiment of the present invention.

8 is an operation flowchart of the MCU shown in FIG.

FIG. 9 is a diagram showing an example of wireless channel usage status displayed on a display.

FIG. 10 is a diagram showing how the antenna voltage amplitude varies depending on the environment.

FIG. 11 is a diagram showing a configuration of a wireless device (wireless keyboard, wireless mouse) according to a third embodiment of the present invention.

FIG. 12 is a diagram showing a wireless mouse according to a third embodiment.

FIG. 13 is a diagram showing a modified example of the third embodiment.

FIG. 14 is a perspective view showing an information processing apparatus including a wireless device (keyboard) according to a fourth embodiment of the present invention.

15 is a block diagram showing a receiving system of the keyboard shown in FIG.

16 is a plan view of the keyboard shown in FIG. 14. FIG.

FIG. 17 is a block diagram showing a receiving system of a wireless device (keyboard) according to a fifth embodiment of the present invention.

FIG. 18 is a plan view of the keyboard shown in FIG.

[Explanation of symbols]

1 Information processing device body 2 display 3 wireless keyboard 3A keyboard 4 wireless mouse 5 wireless receiver 6 antenna 7 Receiver module 8 MCU 9 A / D converter 10 cables 11 Wireless channel setting switch 12 memories 13 signal lines 21, 24 rubber push 22 Battery cover 23 Trackball (or optical means) 31 MCU 32 transmitter 33, 33A Antenna matching circuit 34 antenna 35 comparator 36 LED (or LCD)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshimasa Sato             2-3-5 Higashigotanda, Shinagawa-ku, Tokyo Wealth             Within Shitsutsu Component Co., Ltd. F-term (reference) 5E501 BA03 CA02 CB02 CB09 FA46                 5K060 BB07 CC04 CC11 DD08 JJ04                       JJ21 JJ23 LL07 NN03 PP05                 5K061 AA09 BB11 CC25 DD02 JJ06                       JJ07                 5K067 BB21 DD44 EE02 EE12 FF02                       FF23 HH22 HH23 LL01 LL05

Claims (16)

[Claims] 1. A wireless device that receives a wireless signal output from a wireless input device and outputs information included in the wireless signal to a main body of an information processing device, detects the usage status of each wireless channel, A wireless device comprising means for outputting a signal indicating a usage status to the information processing device body. 2. The means for determining whether each radio channel is in use or unused by comparing the reception strength of each radio channel with a predetermined threshold value.
The described wireless device. 3. The means compares the reception strength for each radio channel with a threshold value corresponding to an average value of the maximum value and the minimum value of the reception strength, and the reception strength is equal to or lower than the threshold voltage. If so, the wireless device according to claim 1, wherein the wireless channel is determined to be unused. 4. The wireless device has a non-volatile memory,
A reception strength, a threshold reception strength for judging whether each radio channel is in use or not, and an ID for identifying a user of the radio channel are stored for each radio channel. The wireless device according to item 1. 5. The apparatus according to claim 1, wherein the means starts an operation of detecting a usage status of the wireless channel in response to an instruction from the information processing apparatus body. Wireless device. 6. The apparatus according to claim 1, wherein the means starts an operation of detecting a usage status of the wireless channel in response to an instruction from the wireless input device. Wireless device. 7. The wireless device according to claim 1, wherein the wireless input device has a unit for selecting a wireless channel. 8. The wireless input device includes a receiver that receives a wireless signal from a mouse, and a transmitter that transmits a signal corresponding to a key operation and a wireless signal from the mouse to the wireless device. The wireless device according to any one of claims 1 to 7. 9. The wireless input device according to claim 1, further comprising means for indicating that the antenna matching is deviated due to the environment and the transmission power is reduced, and means for manually adjusting the antenna matching. 9. The wireless device according to claim 8. 10. A radio apparatus for transmitting a radio signal, comprising: a first means for indicating that the antenna matching is deviated due to the environment and the transmission power is reduced; and a second means for manually adjusting the antenna matching. A wireless device characterized by the above. 11. The wireless apparatus according to claim 10, wherein the first means has a light emitting element, and the display of the light emitting element changes when the transmission power is reduced. 12. The wireless device according to claim 10, wherein the second means includes a variable capacitance circuit coupled to an antenna. 13. The second means includes a variable capacitance circuit coupled to an antenna, and a switch for externally controlling the capacitance of the variable capacitance circuit, according to any one of claims 10 to 12. The wireless device according to the item. 14. A wireless device having a keyboard function, comprising a plurality of antennas, receiving a wireless signal from a wireless mouse via the plurality of antennas, and processing information in the wireless signal via a cable. A wireless device which outputs to a main body. 15. The radio apparatus according to claim 14, wherein each of the plurality of antennas has a reception unit and performs diversity reception. 16. The receiving section common to the plurality of antennas, wherein the receiving section selects an antenna having the highest reception intensity from the plurality of antennas.
The described wireless device.