JP2000092243A - Radio mobile station device and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the limitation of distance between a radio mobile station and an image display device and to display an image even when the image display device is located at a place separated from the radio mobile station. SOLUTION: This device is constructed so as to connect a radio mobile station 1 to an image display device 2 by radio. In such a case, the radio mobile station 1 is provided with a transmitting part 14 and a receiving part 13 for transmission and reception of a voice signal, the receiving part 13 receives an image signal and also transmits it to the image display device 2 through the transmitting part 14 and the image display device 2 is provided with a receiving part 22 which receives a radio image signal from the transmitting part 14, a decoder 23 which demodulates a baseband signal from the receiving part 22 into an image signal, an image data processing part 24 which performs image processing of the image signal and a display 25 which shows the image signal processed by the image data processing part 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio mobile station apparatus and a radio communication system having a display device for displaying an image in a radio mobile station, and more particularly, to a mobile station capable of wirelessly communicating via a radio base station. The present invention relates to an image display apparatus for displaying images on a wireless mobile station apparatus and a wireless communication system.

[0002]

2. Description of the Related Art In recent years, demand for mobile communication equipment has increased, and not only voice communication but also data communication can be transmitted and received at a destination. Under such circumstances, it is desired that the transmission communication of the image signal can be visually recognized together with the data on the display while moving or carrying the image signal.

[0006] As shown in FIG. 6, a device which is attached to a radio mobile station to display an image is conceivable. This device is configured as an image display accessory device connected to the radio mobile station main unit by a signal line. The radio mobile station 3 includes an antenna 31, an antenna duplexer 32, a receiving unit 33, and a transmitting unit 3.
4, control unit 35, transmitter 3 connected to control unit 35
6, a receiver 37 and an incoming speaker 38 are provided. Also,
The auxiliary device 4 includes an image data processing unit 41 and a display 4
2 is provided.

Then, by connecting the image data processing section 41 of the accessory device 4 to the control section 35 of the radio mobile station 3 via the signal line 5, the control section 35 of the radio mobile station 3 detects an image signal. At that time, the image signal is processed by the image data processing unit 41 of the accessory device 4 through the signal line 5, and the image is displayed on the display 42 in the accessory device 4.

[0005]

However, in such a configuration of the accessory device, it is necessary to provide the connector 51 connected to the signal line 5 for connecting the accessory device 4 to the main body 3 of the wireless mobile station. It is necessary to secure the installation space in the mobile station 3, which is an obstacle in reducing the size of the telephone device body. In addition, in a telephone device main body of a model in which such a connector is not provided, the auxiliary device 4 cannot be connected, and the model of the telephone device main body that intends to use this type of auxiliary device is limited. There is.

Further, since the maximum distance between the telephone device main body 3 and the auxiliary device 4 is determined by the length of the signal line 5, its use is restricted, and when the telephone device 3 is separated from the telephone device main body 3, the auxiliary device is not used. 4 cannot be used, and there is a problem that convenience is lacking.

An object of the present invention is to reduce the restriction on the distance between a wireless mobile station and an image display device, and to display an image even when the image display device is located away from the wireless mobile station. It is an object of the present invention to provide an image display device which is enabled.

Another object of the present invention is to provide an image display method and an image display device capable of displaying an image without restricting the model of the wireless mobile station.

Still another object of the present invention is to provide an image display method and an image display apparatus capable of displaying an image without providing a connector in the wireless mobile station, and a mobile station apparatus and a base station. And a wireless communication system comprising:

[0010]

According to the present invention, there is provided a radio mobile station apparatus in which a radio mobile station and an image display device are wirelessly connected, wherein the radio mobile station includes a transmitting / receiving section for transmitting / receiving an audio signal and a receiving section. The receiving unit receives an image signal and transmits the image signal to the image display device via the transmitting unit, the image display device receiving a wireless image signal from the transmitting unit, the receiving unit A demodulator that demodulates a baseband signal from the image signal into an image signal, an image data processing unit that performs image processing on the image signal, and a display that displays the image signal processed by the image data processing unit. And

In the above-mentioned radio mobile station apparatus, the radio mobile station includes a receiving unit, a receiving unit, a transmitting unit, and a transmitting unit for voice communication, and further includes an operation button for performing a call termination instruction and various switches. Wherein the image signal is digitally modulated and transmitted to the image display device.

In the wireless mobile station device, the wireless mobile station may include an audio / video separation circuit for separating an audio signal and an image signal from the receiving unit, and an image / video signal separated by the audio / video separation circuit. A high-frequency modulation is performed by a transmission unit and wirelessly transmitted to the image display device.

The present invention also relates to a wireless communication system for wirelessly communicating between a base station, a wireless mobile station, and an image display device, wherein the wireless mobile station includes an audio signal transmitting / receiving transmitting section corresponding to the base station. And a moving receiving unit, wherein the moving receiving unit receives an image signal and transmits the image signal to the image display device via the transmitting / receiving transmitting unit, and the image display device includes:
An image receiving unit that receives a wireless image signal from the transmitting and receiving transmitting unit, a decoder that demodulates a baseband signal from the image receiving unit into an image signal, and an image data processing unit that performs image processing on the image signal, A display for displaying the image signal processed by the image data processing unit.

In the wireless communication system, the transmission / reception transmission unit and the mobile reception unit are a transmission / reception unit of a spread spectrum system, and the mobile reception unit receives a signal received from the base station using a first spreading code. The signal is despread and converted into a baseband signal, and the transmitting / receiving transmitting / receiving unit transmits the image to the image display device using a second spreading code different from the spreading code to the base station.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described.
This will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing the relationship between a radio mobile station 1 and an image display device 2 according to this embodiment. The radio mobile station 1 and the image display device 2 are connected via a radio path. ing. The wireless mobile station 1 communicates with a base station (not shown) by wireless communication.

FIG. 2 is a block diagram of the radio mobile station 1, and FIG. 3 is a block diagram of the image display device 2.

In FIG. 2, an antenna 11 for receiving a radio wave from a base station (not shown), an antenna resonator 12 for transmitting and receiving to and from the antenna 11, and a reception signal from the antenna resonator 12 to be converted into a baseband signal Receiving unit 13 for conversion
And a transmitting unit 14 for modulating and transmitting a transmission signal, and a control unit 15 for receiving the baseband signal and controlling the entire mobile station in order to transmit the transmission signal. Is a transmitter 16 for detecting sound with a microphone or the like, a receiver 17 for outputting sound with an earphone or the like, an operation button 18 for giving an instruction with a keyboard or the like, various switches 19 such as a power switch and a band switch, a display on a liquid crystal panel or the like. A device 110, an LED 111 for displaying a power-on state and an incoming call from a base station, and a speaker 112 for outputting demodulated audio from the receiving unit 13 are connected.

On the other hand, in FIG. 3, the image display device 2
A small antenna 21 for receiving a radio wave transmitted from the wireless mobile station 1, a receiver 22 for demodulating a radio wave received by the small antenna 21, and a signal sequence obtained by decoding a signal demodulated by the receiver 22 The image processing apparatus includes a decoder 23, an image data processing unit 24 for processing image data, and a display 25 such as a liquid crystal panel or a simple CRT for displaying an image processed by the image data processing unit 24.

Here, the receiving unit 13 and the transmitting unit 14 of the radio mobile station 1 are performing transmission / reception communication with a base station (not shown) by a spread spectrum method.
4 and the receiver 22 of the image display device 2 similarly perform transmission / reception communication by a spread spectrum method in which spreading and despreading are performed by separate spreading codes. By this spread spectrum system, sharing of each receiving unit and transmitting unit can be easily achieved.

The base station and the radio mobile station 1 are connected by a public line, and after securing a connection line,
Wireless communication with the image display device 2 is performed.

[Operation of this Embodiment] Next, the operation of this embodiment will be described in detail with reference to FIG. When the radio mobile station 1 receives a radio wave including an image signal from the base station (S11), the receiving unit 13 demodulates the received radio wave (S12), and the control unit 15 decodes the demodulated baseband signal (S13). . This received signal is transmitted to the transmitting unit 1
4, and is modulated (S14) and transmitted to the image display device 2 as a wireless image signal (S15).

In this case, regarding the image signal, the receiving unit 1
3, the image signal itself transmitted from the base station can be demodulated, re-modulated to a wireless signal and transmitted from the antenna 11. On the other hand, the wireless mobile station 1 is simply converted to a wireless frequency and transmitted to the antenna 11. It may be operated as a booster for transmitting from.

A case will be described in which the base station and the radio mobile station adopt the spread spectrum system. When the received radio wave uses the spread spectrum method in the receiving unit 13, the received radio wave is despread with a predetermined spreading code to decode the received radio wave into a baseband signal including an image signal. The medium audio signal component is decoded and driven toward the transmitter 16, and the image signal component is transmitted to the transmitter 14.
Then, the transmitting section 14 spreads using a spreading code different from the spreading code to the base station, and transmits the spread spectrum signal to the image display device via the antenna resonator 12.
The voice signal received by the receiver 17 is modulated by the control unit into a baseband signal, and is transmitted by the transmission unit 14 to the base station via the antenna resonator 12 as a spread spectrum signal with a predetermined spreading code. In this case, the transmission unit 14 switches the spreading code and transmits the same.

In this case, the transmission unit 14 of the radio mobile station can be shared between the base station and the image display device simply by changing the generation pattern of the generator of the spread code. A reduction in thickness is achieved.

Next, the radio image signal is transmitted to the radio mobile station 1.
Transmitted from the image display device 2, the wireless image signal is received by the small antenna 21 (S21), and the received signal of the wireless image signal is demodulated by the receiver 22 (S2).
2) Decoding is performed by the decoder 23 (S23), and image data included in the decoded signal is extracted (S24). Then, this image data is output to the display 25 (S2
5).

Therefore, since the connection between the screen display device 2 and the wireless mobile station 1 is wirelessly connected, the image display device 2 can be used even by the wireless mobile station 1 having no connector. There is no restriction on the model of the wireless mobile station 1, and since there is no signal line connecting the wireless mobile station 1 and the image display device 2, it is possible to move away from the wireless mobile station 1. There is no trouble in handling.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 5, there is no need to connect both wires by wire as in the conventional device of FIG. Since the display device 2 and the wireless mobile station 1 are wirelessly connected, there is no need to provide a connector for connecting a signal line to the wireless mobile station 1, and the wireless mobile station 1 can be reduced in size.

[0029]

As described above, according to the present invention, since the image display device is formed separately from the radio mobile station, the convenience in using the image display device is high.

Further, the image display device can be used even in a wireless mobile station having no connector, and there is no limitation on the model of the wireless mobile station.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the relationship between a wireless mobile station and an image display device according to the present invention.

FIG. 2 is a configuration block diagram of a wireless mobile station according to the present invention.

FIG. 3 is a configuration block diagram of an image display device according to the present invention.

FIG. 4 is a diagram illustrating a relational operation between the wireless mobile station and the image display device according to the present invention.

FIG. 5 is a diagram illustrating the relationship between a wireless mobile station and an image display device according to the present invention.

FIG. 6 is a diagram showing a relationship between a wireless mobile station and an image display device according to a conventional example.

[Explanation of symbols]

 1,3 Wireless mobile station 2,4 Image display device 11,31 Antenna 12,32 Antenna resonator 13,33 Receiving unit 14,34 Transmitting unit 15,35 Control unit 16,36 Transmitter 17,37 Receiver 18 Operation button Reference Signs List 19 Various switches 110 Indicator 111 LED 112, 38 Speaker 21 Antenna 22 Receiver 23 Decoder 24, 41 Image data processing unit 25, 42 Display

Claims (5)

[Claims] 1. A wireless mobile station device in which a wireless mobile station and an image display device are wirelessly connected, wherein the wireless mobile station includes a transmitting / receiving unit for transmitting / receiving a voice signal, and the receiving unit includes an image signal And transmitting the image signal to the image display device via the transmission unit, wherein the image display device receives a wireless image signal from the transmission unit, and transmits a baseband signal from the reception unit to the image signal. A radio mobile station apparatus comprising: a decoder for demodulating the image signal; an image data processing unit for performing image processing on the image signal; and a display for displaying the image signal processed by the image data processing unit. 2. The radio mobile station apparatus according to claim 1, wherein the radio mobile station includes a receiving unit, a receiving unit, a transmitting unit, and a transmitting unit for voice communication, and further performs an operation of instructing a call termination. A wireless mobile station device comprising a button and various switches, wherein the image signal is digitally modulated and transmitted to the image display device. 3. The radio mobile station apparatus according to claim 1, wherein the radio mobile station is separated by a voice / image separation circuit that separates a voice signal and a video signal from the receiving unit, and a voice / image separation circuit. A radio mobile station apparatus, wherein the transmitting section wirelessly modulates the image signal by the transmitting section and wirelessly transmits the modulated image signal to the image display apparatus. 4. A wireless communication system for wirelessly communicating between a base station, a wireless mobile station, and an image display device, wherein the wireless mobile station transmits and receives an audio signal transmitting / receiving unit and a mobile receiving unit corresponding to the base station. Wherein the mobile receiving unit receives an image signal and transmits the image signal to the image display device via the transmitting / receiving transmitting unit, and the image display device receives a wireless image signal from the transmitting / receiving transmitting unit. An image receiving unit, a decoder for demodulating a baseband signal from the image receiving unit into an image signal, an image data processing unit for performing image processing on the image signal, and displaying the image signal processed by the image data processing unit A wireless communication system comprising: 5. The wireless communication system according to claim 4, wherein the transmission / reception transmission unit and the mobile reception unit are transmission / reception units of a spread spectrum system, and the mobile reception unit receives a signal received from the base station. A radio wave characterized by despreading with a first spreading code and converting it into a baseband signal, wherein the transmitting / receiving transmitting / receiving unit transmits to the image display device with a second spreading code different from the spreading code to the base station. Communications system.