KR20010028757A - Method for displaying a received information to external display apparatus - Google Patents

Abstract

PURPOSE: A method for displaying receiving information on an external display apparatus is provided to convert the receiving information into character information packets, and to wirelessly transmit the character information packets to connection-set slave display apparatuses. CONSTITUTION: A controller refers slave display apparatuses capable of performing wireless LAN communication, among display apparatuses. The controller selects more than one display apparatuses among the referred slave display apparatuses. The controller sets up a baseband connection between the selected display apparatuses and a master. The controller converts receiving information into character information packets, and wirelessly transmits the character information packets to the set slave display apparatuses. The slave display apparatuses read display information only, from the wirelessly-transmitted character information packets, and display the information.

Description

{METHOD FOR DISPLAYING A RECEIVED INFORMATION TO EXTERNAL DISPLAY APPARATUS}

The present invention relates to a short-range wireless communication system using Bluetooth, and more particularly, to a method for displaying information received on a portable information terminal on an external display device.

The display device of the portable terminal has been miniaturized to meet the trend of miniaturization of the portable terminal, and even though the size of the terminal itself is smaller, as in the case of a folding type terminal, only the display apparatus is relatively expanded to enhance user convenience. There is also a terminal.

Even considering all of these portable terminals, the number of characters that can be displayed on the display device when performing high-speed data communication is extremely limited, and the size of the characters that are displayed on the limited-size display device is small, which causes inconvenience to use. do.

Accordingly, an object of the present invention is to provide a method for enhancing convenience of portable terminal users by displaying information received on the portable terminal on an external display device using Bluetooth.

In order to achieve the above object, the present invention provides a method for displaying information received on a master equipped with a wireless communication module on a plurality of slave display devices equipped with a wireless communication module.

A first process of querying slave display devices capable of short-range wireless communication among the display devices;

Selecting at least one display device among the inquired slave display devices;

A third process of establishing a baseband connection between the selected slave display device and the master;

Converting received information into a text information packet and wirelessly transmitting the received information to the connected slave display device;

And a fifth process of reading and displaying only display information from the text information packet transmitted wirelessly.

1 is a block diagram of a short-range wireless communication system according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of the master communication system 100 of FIG. 1.

3 is a detailed configuration diagram of the slave communication system 200 in FIG.

FIG. 4 is a process flow up to sending and displaying text information between the master / slave communication systems shown in FIGS. 2 and 3;

Hereinafter, a method according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

For reference, "Bluets" to be described in the following description is based on the Bluetooth Protocol proposed by ERICSSON as a near field wireless communication device for replacing wired or infrared communication in the near field. The Bluets standard proposes to communicate with other Bluets devices in accordance with the Bluets standard by accepting its request as a master of communication at close range.

1 is a block diagram of a short-range wireless communication system according to an embodiment of the present invention, which is composed of one master and a plurality of slaves. In FIG. 1, one computer having a display device ( 230 is shown as one slave (200). That is, in FIG. 1, the mobile phone 110 and the short-range wireless communication module (hereinafter referred to as BT) 130 mounted thereon are the master 100 side, and the computer 230 and the BT module 210 mounted thereon are connected to the slave side. Wireless communication is achieved.

Hereinafter, detailed configurations of the devices configuring the master 100 and the slave 200 will be described with reference to FIGS. 2 and 3.

First, FIG. 2 illustrates a detailed configuration diagram of the master communication system 100 of FIG. 1. Referring to FIG. 2, the BT module 130, which is a component of the master communication system 100, includes an RF transmitter / receiver 138, a baseband processor 134, a link controller 1 136, and an interface unit (I / F). 132). The baseband processor 134 and the link control unit 1 136 are connected to the mobile phone 110 control unit 1 118 by a host control interface (HCI) to transmit / receive an HCI packet so that the control command and, as a result, Transmit and receive data. As the HCI, a USB, standard PC interface including RS232C can be used, and the HCI packet is divided into a command, an event, and a data packet. The command packet provides various commands for displaying a received text according to the present invention.

The RF transmitter / receiver 138 modulates and transmits a wireless transmission data packet generated by the baseband processor 134 in a set frequency band at the time of transmission, and suppresses noise amplification of a received frequency signal at the time of reception. After amplifying a signal of a set frequency band, the signal is lowered to a low frequency band and applied to the baseband processor 134.

The baseband processor 134 changes the packet format to add an access code and a header to various HCI data packets applied from the control unit 1 118 of the mobile phone, which is a host, and converts the packet into a predetermined data packet for wireless transmission again. The RF transmission / reception unit 138 wirelessly transmits the set frequency band, and converts the received data packet into the HCI packet and transmits it to the control unit 1 118.

The link control unit 1 136 controls the BT module 130 based on a command of a command packet applied from the mobile phone control unit 1 118 and requests from the slave 200 to be input from the baseband processing unit 134. And the result information is transmitted to the control unit 1 (118) that is the host as an HCI packet.

Meanwhile, the mobile phone 110 includes a controller 1 118, a memory 122, a user interface 120, a BBA 116, an RF transmitter / receiver 114, and a duplexer 112. The receiver of the RF transmitter / receiver 114 suppresses amplification of noise, amplifies a desired signal, and generates a digital signal through an intermediate frequency. This digital signal is analyzed and processed by the controller 1 118. Meanwhile, the transmitter of the RF transmitter / receiver 114 modulates and amplifies the signal generated by the controller 1 118 into a desired frequency band and is radiated to the antenna via the duplexer 112.

The controller 1 118 of the mobile phone 110 controls the overall operation of the mobile phone and enables wireless transmission of the received information (text information, graphic data, etc.) to the slave 200 by using the Bluetooth BT.

The memory 122 stores a ROM in which a program storing control data necessary for controlling a mobile phone, a nonvolatile memory for storing various telephone numbers and names, and temporarily stores data generated during the program control. It consists of RAM.

The user interface 120 includes a key input unit having a numeric key for dialing and a key for setting various functions, and a display unit for displaying the state and operation of the mobile phone.

The baseband analog (BBA) 116 converts an intermediate frequency signal into a baseband signal and converts an analog baseband into a digital form for a receiver, converts digital data into an analog baseband for a transmitter, and intermediates the baseband. Convert to frequency.

The duplexer 112 receives a radio signal of a frequency band received from an antenna and outputs the radio signal to the receiver of the RF transmitter / receiver 114. The duplexer 112 transmits a signal transmitted from the transmitter of the RF transmitter / receiver 114 to a transmission frequency band. Output through the antenna.

Meanwhile, FIG. 3 illustrates a detailed configuration diagram of the slave communication system 200 of FIG. 1. The BT module 210 mounted on the slave 200 also has an RF transmitter / receiver 212 and a baseband processor as described above. 214, link control unit 2 216, and I / F unit 218. FIG. Each configuration of the BT module 210 is the same as the BT module 130 of the master 100 side will be omitted in the following description. On the other hand, the computer 230, which is a host on the slave 200 side, has a configuration including at least a computer controller 4 234, a monitor 236, and a keyboard 232. The control unit 4 234 receives a command and data input from the keyboard 232 and converts it into an HCI packet and transmits the same to an HCI packet, and receives and processes an HCI packet applied from the BT module 210. In charge of.

Hereinafter, a process for displaying text information received on the mobile phone 110 on the monitor 236 using the BT modules 130 and 210 mounted on the mobile phone 110 and the slave computer 230 will be described below. same.

FIG. 4 shows a process flow up to transmitting and displaying text information between the master / slave communication systems shown in FIGS. 2 and 3.

First, if there is a short range wireless communication selection through the user interface 120 in step 300 of FIG. 4, the control unit 1 118 of the mobile phone 110 proceeds to step 310 to check whether there is a selection of the received text information retransmission mode. The received text information retransmission mode refers to a mode for retransmitting text information received by the mobile phone 110 to the computer 230 using the BT module 130 according to an embodiment of the present invention. If the received text information retransmission mode is selected in step 310, the flow proceeds to step 320 and requests a BT inquiry command from the BT module, that is, the master BT module 130. Such inquiry commands are made regularly at regular intervals. By such a command, the link control unit 1 136 sets a value in a register to control the baseband processing unit 134, and the baseband processing unit 134 starts an inquiry process. In step 330, the baseband processor 134 that initiates the inquiry process continuously transmits an inquiry train consisting of continuous transmission of IQ packets for a predetermined time. In this case, the transmitter of the RF transmitter / receiver 138 transmits an IQ packet, but the receiver waits for a response from other units. If the BT module on the slave side performing an inquiry scan receives an IQ packet in a continuous inquiry train section, the BT module generates a random number and sleeps after memorizing the frequency when the IQ packet is received. Switch to the (sleep) state. After waking up from the sleep state after the slot corresponding to the random number, waits for the hopping frequency triggered by itself, and if triggered again, the transmitter transmits an FHS packet in response to the inquiry. . That is, in the embodiment of the present invention, the BT module 210 of the slave 200 transmits the FHS packet in response to the inquiry command request of the master BT 130 in step 340. Upon receiving the FHS packet, the master BT 130 notifies that the response has been received by a value set in an internal register. By setting such a register, the HCI transmits the result of the inquiry, that is, the inquiry response to the mobile phone controller 1 118, which is the host. Inform. On the other hand, the control unit 1 118 of the mobile phone 110 checks whether the inquiry is completed after requesting the BT inquiry command in step 360 and outputs the inquiry result to the outside through the user interface unit 120 in step 370. Accordingly, the user can recognize what is in the display apparatuses for retransmitting the received text information.

If the user selects any one of the desired display devices, the controller 1 118 recognizes the address in step 380 and proceeds to step 390 in response to the step 390 to set the baseband with the BT corresponding to the selected address to the master BT 130. Requires. Then, the master BT 130 requests the baseband setting to the slave BT 210 according to the control command of the mobile phone controller 1 118 in step 400. In operation 410, the slave BT 210 transmits a baseband setup response to the master BT 130 that responds to the baseband setup request.

Baseband setting of the mobile phone 110 and the computer 230 as described above is made as follows. First, the control unit 1 118 of the mobile phone performs a paging operation for baseband setting. The paging operation transmits the HCI command packet to the link control unit 1 136 of the BT module 130 in the control unit 1 118. After receiving the command, the link controller 1 136 requests the baseband processor 134 to establish a baseband with the slave 100 corresponding to the selected address to activate the paging operation. When the paging operation is completed, the baseband setup request packet is transmitted to the BT module 210 which is the slave 200, and when it is accepted, the baseband is set between the master mobile phone 110 and the slave computer 230. .

On the other hand, if there is a baseband setting response, the control unit 1 118 of the mobile phone 110 switches to the text information transmission mode in step 430 and proceeds to step 440 to check whether there is text information reception. If the test result is received, the control unit 1118 proceeds to step 450 and transmits the received text information to the master BT 130 in the form of an HCI packet. When the HCI packet of a predetermined unit is transmitted to the master BT 130 as described above, the baseband processor 134 converts the transmitted HCI packet into a character information packet to which an address code and a header are added (step 460). In the wireless transmission to the slave BT (210). Then, the baseband processor 214 of the slave BT module 210 converts the received text information packet back to the HCI packet in step 480. That is, the address code and the header are removed from the received text information packet, and only the text information is converted into the HCI packet, and the process proceeds to step 490 to be transmitted to the control unit 4 234 of the computer 230. The controller 4 234 of the computer 230 controls the monitor 236 to display the text information received from the mobile phone 210 to the outside.

If there is no short-range wireless communication release command from the user (step 510), the received information is continuously transmitted wirelessly to the computer 230 as described above, and if the short-range wireless communication release command is received through the user interface unit 120, The control process according to the embodiment of the invention ends.

As described above, the present invention displays the information received by the portable terminal on the external display device through the Bluetooth module, thereby eliminating user inconvenience caused by the size limitation of the display device.

Claims (2)

A method for displaying information received on a master equipped with a wireless communication module on a plurality of slave display devices equipped with a wireless communication module, the method comprising: A first process of querying slave display devices capable of short-range wireless communication among the display devices; Selecting at least one display device among the inquired slave display devices; A third process of establishing a baseband connection between the selected slave display device and the master; Converting received information into a text information packet and wirelessly transmitting the received information to the connected slave display device; And a fifth process of reading and displaying only display information from the text information packet transmitted wirelessly. The method of claim 1, wherein the text information packet is a packet in which an address code and a header are added to a Host Command Interface (HCI) packet received from a host of the master.