KR100345597B1 - A method of connecting external keyboard for pcp - Google Patents

Abstract

The present invention relates to an external keyboard that replaces a button function of a mobile terminal, and more particularly, to an easy use of a text message service, an Internet connection, and other additional services using a mobile terminal. A connection determination process of supplying operation power to the external keyboard, determining whether the external keyboard is connected by signals applied through a plurality of ED terminals, and terminating when it is determined that the external keyboard is not connected; A connection stabilization process for determining whether the connection is continued or the first connection when it is determined in the connection determination process, and in the case of the first connection, delaying and stabilizing for a predetermined first time; A key button recognition process of recognizing and processing a key button input signal applied from an external keyboard in a portable terminal; A sleep process of switching to a sleep mode when a key button input signal is not received for a predetermined second time set from an external keyboard; Determining whether the key button input signal is recognized in the sleep mode state, and if the key button input signal is not recognized, checking the feedback to the connection determination process; When the key button input signal is recognized in the checking process, the key button input signal is ignored, and the reconnection process is carried out to return to the key button recognition process.

Description

External keyboard connection method of mobile terminal {A METHOD OF CONNECTING EXTERNAL KEYBOARD FOR PCP}

The technology of the present invention relates to an external keyboard that replaces a button function of a mobile terminal, and in particular, by increasing the size of each button constituting the button unit and having the same arrangement as a computer keyboard, a character using a mobile terminal The present invention relates to making it easy to use a message service, an Internet connection, and other additional services.

The mobile terminal is a mobile communication device that can easily communicate with anyone anytime, anywhere while moving, and its spread is rapidly spreading due to its convenience of use, and it is becoming a necessity or belonging to a modern urban person who has a lot of activities.

Such a portable terminal is a service that can be used by the development of the corresponding technology, for example, additional services such as text message transmission, fax transmission and Internet access, etc. continue to be developed and provided, but for the convenience of carrying There is a problem that the size is light and short, and the data input means for using the additional service, that is, the size of a button or the like continues to decrease in size and cannot increase the number of buttons.

In order to use various additional services provided by the mobile communication system, various special function buttons are required, but in a mobile phone in which the number of buttons is limited, each button must accommodate all the various functions. There are many problems that are inconvenient and difficult to fully use the additional services by operating the buttons.

In the case of utilizing the additional service by using the portable terminal which is miniaturized as described above, by using the external button device to replace the various functions of the minority button part with the multiple buttons and additionally arrange the buttons of the special functions, the mobile terminal can be provided by the mobile terminal. Various kinds of value-added services can be easily utilized.

Hereinafter, an external keyboard of a portable terminal according to the prior art will be described with reference to the accompanying drawings.

It is attached to explain the prior art. 1 is a diagram illustrating a connection configuration of an external keyboard of a portable terminal according to the prior art, and FIG. 2 is a flowchart of using an external keyboard according to the prior art.

Referring to FIG. 1, the external keyboard connection configuration of the portable terminal according to the related art is connected to the mobile communication system wirelessly, and the mobile terminal 10 which can immediately communicate anytime and anywhere while moving;

An external keyboard 20 that operates by its own power while functioning as a keypad or a keyboard of the portable terminal 10, writes a message by a user, displays and transmits the message on the display unit, and displays a received message on the display unit;

It is fixedly connected to the external keyboard 20 and electrically connectable to and disconnected from the mobile terminal 10. It consists of a data cable 30 to transmit the message data created in the external keyboard 20 to the portable terminal 10, and to transmit the message data received from the portable terminal 10 to the external keyboard 20.

Referring to FIG. 2, the order of using the external keyboard according to the related art is the first step (S10) of connecting the data cable 30 to the mobile terminal 10, and

A second step (S20) of turning on the power of the external keyboard 20;

A third step (S30) of creating a corresponding message by using a corresponding key button of the external keyboard 20;

A fourth step (S40) for rewriting the message by determining whether to input the message written on the external keyboard 20 to the mobile terminal 10, and if not, returning to the third step;

In the case of inputting a message determined in the fourth step (S40), a fifth step (S50) of inputting a message written on the external keyboard 20 to the portable terminal through the data cable 30;

The mobile terminal 10 receiving the message by the step (S50) is a sixth step (S60) for transmitting the message to the transmission destination by transmitting wirelessly,

If it is determined whether to continue the message transmission as described above, and returns to the third step (S30). The case of terminating consists of a seventh step of proceeding to terminating.

Hereinafter, a portable terminal external keyboard according to the related art having the above configuration will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the external keyboard 20 is operated by its own power source, and the created message can be checked and corrected by the user by displaying the created message on a corresponding LCD display mounted on the portable terminal. Is transmitted to the mobile terminal 10 via the data cable 30, the mobile terminal 10 is transmitted wirelessly.

For an external keyboard of the portable terminal according to the related art having the above configuration, referring to FIG. 2, the connector or the data cable 30 fixedly connected to the external keyboard 20 is connected to the corresponding connector of the mobile terminal 10. After the electrical connection by inserting into the receptacle connector (S10), the switch of the power supply for operating the external keyboard 20 itself (On) is turned on (S20).

When the user composes a message using the external keyboard 20, that is, composes a message using the corresponding key button, the user confirms the message by using the corresponding LCD display of the mobile terminal and completes the message by the necessary modification. (S30), and determines whether to input the message completely written as described above to the mobile terminal 10 or to modify again (S40), if it is modified again, the feedback to the third step (S30), In the case of inputting, a message written completely by the external keyboard 20 is input to the mobile terminal 10 by using the corresponding input button key (S50).

The mobile terminal 10 which has received the above message transmits the message to the transmission destination (S60) by transmitting the input message using the corresponding wireless channel (S60).

After determining whether there are more messages to transmit (S70), if the message transmission process is to be repeated again, the process returns to the third step S30, and when there are no more messages to transmit, the process ends.

However, since the external terminal 20 of the portable terminal according to the prior art having the above-described configuration operates by its own power supply, there is a problem that the size of the portable terminal increases and the weight of the battery increases.

In addition, the external keyboard 20 according to the prior art has to completely input a message to the portable terminal 10 after completely writing a message to be transmitted, and there is a problem that it is difficult to correct the message input to the portable terminal.

In addition, the external keyboard 20 according to the prior art may use only a text service for transmitting and receiving a message, and there is a problem in that various additional services such as fax transmission and reception using the mobile terminal 10 and the Internet connection cannot be used.

It is an object of the present invention to provide a method for using various additional services provided by a mobile communication system using an external keyboard connected to a portable terminal.

The present invention has been made in order to achieve the above object, in the external keyboard connected to the portable terminal in the RS-232E method, the portable terminal supplies the operating power to the external keyboard, a signal applied through a plurality of the ED terminal Determining whether or not the external keyboard is connected by the terminal; A connection stabilization process for determining whether the external keyboard is continuously connected or first connected when the external keyboard is connected in the connection determination process, and for stabilizing by delaying the first predetermined time for a first predetermined time; A key button recognition process of recognizing and processing a key button input signal applied from an external keyboard in a portable terminal; A sleep process of switching to a sleep mode when a key button input signal is not received for a predetermined second time set from an external keyboard; A determination process of determining whether a key button input signal is recognized in a sleep mode state by the sleep process, and returning to the connection determination process if the key button input signal is not recognized; In the case where the key button input signal is recognized in the checking process, the key button input signal may be ignored, and the reconnection process may be performed to return to the key button recognition process.

1 is an external keyboard connection configuration of a portable terminal according to the prior art,

2 is a flowchart illustrating the use of an external keyboard according to the prior art;

3 is a connection diagram of a portable terminal and an external keyboard according to the present invention;

4 is a connection state diagram of an RS-232E data cable connecting a portable terminal and an external keyboard according to the present invention;

5 is a structural diagram of a key button recognition data frame according to the present invention;

6 is a flowchart illustrating the use of an external keyboard according to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: mobile terminal 20, 35; External keyboard

25, 30: data cable

Hereinafter, a method for connecting an external keyboard of a mobile terminal according to the present invention will be described with reference to the accompanying drawings.

3 is a diagram illustrating a connection state of a portable terminal and an external keyboard according to the present invention, and FIG. 4 is RS-232E data connecting the portable terminal and the external keyboard according to the present invention. Fig. 5 is a structural diagram of a key button recognition data frame according to the present invention, and Fig. 6 is a flowchart of use of an external keyboard according to the present invention.

Referring to FIG. 3, the connection state of the portable terminal and the external keyboard according to the present invention is a portable terminal 10 that can use a communication service and various additional services provided by the mobile communication system;

An external keyboard 35 that receives operating power from the portable terminal 10 and replaces duplicated key button functions of the portable terminal 10 with a plurality of key buttons;

It is composed of a data cable 25 is fixedly connected to the external keyboard 35 and the external keyboard 35 and the portable terminal 10 to be connected in the RS-232E method.

Referring to FIG. 4, the connection state of the RS-232E data cable connecting the external keyboard 35 and the portable terminal 10 is transferred from the battery of the portable terminal 10 to the external keyboard 35. A battery line for supplying operational power,

A ground (GND) line connecting the ground of the mobile terminal 10 and the external keyboard 35 in common;

A reception (RXD) line for transmitting a signal of a key button generated from the external keyboard 35 to the mobile terminal 10,

The portable terminal 10 monitors the state of the external keyboard 35 and transmits a signal for controlling a sleep mode when a signal of a key button is not applied from the external keyboard 35 for a predetermined time (TXD ) Track,

It consists of a plurality of external device monitoring (EDS: External Device Sensor 0,1) line to determine whether the external keyboard is connected to the portable terminal 10 by a signal applied from the external keyboard (35).

Referring to FIG. 5, the external keyboard 35 is connected to the mobile terminal 10 by RS-232E connection, and is asynchronous, 1 Start bit, 8 Data bit, 1 Stop bit, No Parity bit. By transmitting data at a transmission rate of 38.3 Kbps, the key button recognition data frame transmitted through the reception (RXD) line from the external keyboard 35 to the mobile terminal 10 as described above. The configuration state of the data frame is a command for requesting processing for a generation signal Event of a key button generated in the external keyboard 35, and a toggle signal using one bit. A sequence bit for generating a to distinguish each key button input signal; A command byte consisting of a command code for requesting processing for a key event using seven bits,

A Boolean value indicating the On / Off state of the key button input by the external keyboard 35, and the Key Down state to which each key button is input is true using 4 bits. ), And the Key Up state in which the input of the corresponding key button is completed is displayed as 4 bits (False), and the corresponding key in the state of the Key Up state by the mobile terminal 10 is displayed. A holding state byte recognized as input of a button signal,

A plurality of key buttons constituting the external keyboard 35 are distinguished from each other, and one bit is assigned to display an input state of the shift key button. The shift key button is keyed down. A shift state bit set when input; 26 letter key buttons, 10 number key buttons, 7 edit key buttons, 13 special function key buttons, uppercase / lowercase key buttons, and one / one, which configure the external keyboard 35 by allocating the remaining seven bits. Key Scan Byte consisting of Keyscan Code that can distinguish both Key Button and Special Character Key Button,

A 16-bit cyclic redundancy check (CRC) based on CCITT or ITU to determine whether an error has occurred in a byte constituting the key button recognition data frame, and the result value is recorded as 2 bytes. CRC bytes

It indicates that the key button recognition data frame ends, and is excluded from the subject of the cyclic redundancy check (CRC), and consists of an end flag consisting of one byte.

In addition, referring to the attached Figure 6, the order of use of the external keyboard 35 according to the present invention, the RS-232 (RS-232E) using the mobile terminal 10 and the data cable 25 In the external keyboard 35 connected in the

A signal supplied from the portable terminal 10 to the external keyboard 35 through a battery line and applied from the external keyboard 35 through a plurality of external device sensor (EDS) terminals; As an example, it is determined whether the external keyboard 35 is connected to the portable terminal 10 by determining whether a signal of '0,1' is recognized, and the signal of '0,1' from the external keyboard 35. If is not recognized is determined that the external keyboard 35 is not connected by the portable terminal 10, the connection determination process (S100) and terminates,

In the connection determination process (S100), when it is determined that the signal of '0, 1' is connected from the external keyboard 35 and connected by the mobile terminal 10, whether the external keyboard 35 is continuously connected. Or, it is determined whether it is connected for the first time (S110), and when it is connected for the first time, a recognition is performed without recognizing a signal applied from the external keyboard 35 for a predetermined first setting time, that is, for example, for a time of 1 second. Stabilizing the connection of the external keyboard 35 by delaying (S120) the connection stabilization process,

By recognizing and processing the key button recognition data frame signal applied from the external keyboard 35 through the RXD line of the data cable 25, the mobile terminal 10 recognizes that each key button is input. And key button recognition process for processing (S130),

5 through a receive (RXD) line of the data cable 25 from the external keyboard 35 for a predetermined second set time from the external keyboard 35, that is, for example, a time of 5 minutes. It is determined whether a key button input signal, which is the illustrated key button recognition data frame signal, is input (S140), and is supplied from the mobile terminal 10 when the key button recognition data frame signal is not received for the second set time. And a sleep process of switching to a sleep mode (S150) which saves power consumption of the battery power of the mobile terminal 10 by minimizing an operating power.

In the sleep mode state (S150) by the sleep process, it is determined whether the key button input signal, which is the key button recognition data frame signal shown in FIG. 5, from the external keyboard 35 is recognized by the mobile terminal 10, and When the key button input signal is not recognized, a confirmation process (S160) of determining whether the external keyboard 35 is connected again by feeding back to the connection determination process (S100),

When the key button input signal is input from the external keyboard 35 to the portable terminal 10 as determined in the checking process (S160), the recognized key button input signal is ignored when the recognized key button input signal is input. Process as a signal exiting from the sleep mode (Sleep Mode), and fed back to the key button recognition process (S130) by the reconnection process (S170) to start to recognize the signal of the key button applied from the external keyboard 35 It is made up.

Hereinafter, a portable terminal external keyboard connection method of the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

The external keyboard 35 is connected to the receptacle terminal of the mobile terminal 10 using the RS-232E type data cable 25 fixed integrally.

The external keyboard 35 is a dummy type and operates only when operation power is supplied from a battery of the mobile terminal 10 through the data cable 25.

Since the receptacle terminal of the mobile terminal 10 may be connected to various types of external devices such as a hand free (H / F) device, a monitor, and the like, each external device ( In the present invention, when the mobile terminal 10 receives a signal of '0' through the EDS 0 terminal and receives a signal of '1' through the EDS 1 terminal, the external keyboard ( It is determined that 35 is connected to the receptacle terminal.

Thus, as an example, the external keyboard 35 of the present invention is configured to output a signal of '0' to the EDS 0 terminal of the data cable 25, and to output a signal of '1' to the EDS 1 terminal. Hard Ware), but it can be changed according to designer.

As described above, when the portable terminal 10 confirms that the external keyboard 35 is connected through the plurality of EDS terminals, the portable terminal 10 determines whether the connected external keyboard 35 is continuously connected or first connected. In operation S110, when the first connection is made, a delay is delayed so that a signal applied from the external keyboard 35 is not recognized for one second, which is the first setting time for stabilization of the connection.

After the connection stabilization process (S120) as described above, the mobile terminal 10 recognizes the key button signal of the external keyboard 35 applied through the reception (RXD) line (S130).

As described above, the key button signal applied from the external keyboard 35 is shown in detail in FIG. 5, and the command byte is composed of 1 byte, and the holding state byte is 1. Byte consists of 1 byte, Keyscan Byte consists of 1 byte, Cyclic Redundancy Check (CRC) consists of 2 bytes, and End Flag indicating end of data frame consists of 1 byte. It is done.

The portable terminal 10 is input from the external keyboard 35 by a toggle change in which a sequence bit constituting the command byte is continuously changed to a state of '0' and '1'. Each key button signal is distinguished from each other, and the function of the separated key buttons is confirmed by analyzing the key scan byte.

The key scan byte is a signal that can distinguish each of the plurality of key buttons constituting the external keyboard 35, corresponding to each key button used in the mobile terminal 10, and at the same time possible. Separated and easy to use by the user, the portable terminal will be recognized as its own key button.

The holding state byte indicates a time point at which the mobile terminal 10 recognizes a signal of a key button input from the external keyboard 35. The holding state byte indicates four key down states in which each key button is pressed. In the present invention, the signal of the key button is recognized in the Key Up state.

In more detail, the 7-bit Keyscan Code constituting the key scan byte is recognized by the Key Up signal of the Holding State Byte, except that the Shift State bit of the Key scan byte indicating the input state of the Shift key button. Is recognized in Key Down state.

The cyclic redundancy check (CRC) byte indicates 16 bits by checking whether an error has occurred in all data constituting the key button recognition data frame except an end flag, and the key button recognition data frame having the above configuration is an external keyboard. RS-232E is transmitted from the 35 to the mobile terminal 10 at a transmission rate of 38.3 Kbps, and the transmitted signal is Async, 1 Start bit, 8 Data bit, 1 Stop bit, No Parity bit. Is transmitted in a manner.

In recognizing and processing the key button signal having the above-described configuration in the portable terminal 10, the portable terminal 10 recognizes the external keyboard 35 as its own keyboard, which is input by each key button. The signals are processed in order.

In more detail, in the external keyboard 20 according to the related art, a message of a complete sentence is written and then transmitted to the mobile terminal 10. However, the external keyboard 35 according to the present invention immediately inputs a key button. As recognized by. That is, the signal of the key button input through the corresponding display unit of the mobile terminal 10 is checked, corrected or corrected, thereby producing a completed message.

After the mobile terminal 10 finally recognizes the signal of the key button from the external keyboard 35 by the key button recognition process (S130), the key button for a predetermined second setting time, that is, a time of 5 minutes, If the signal is not recognized from the external keyboard 35, the control signal is output to the external keyboard 35 through the transmission (TXD) line of the data cable 25.

The external keyboard 35 receiving the corresponding control signal through the transmission (TXD) line switches to a sleep mode that maintains only a minimum of functions in order to consume the minimum amount of power supplied from the mobile terminal 10. It becomes (S150).

In this case, the portable terminal 10 determines whether a key button is input while the external keyboard 35 is in a sleep mode (S160), and when the key button is not input, the connection determination process (S100). Feedback to determine whether the external keyboard 35 is in a connected state.

When the signal of the key button is applied from the external keyboard 35 in the checking process (S160), the mobile terminal 10 ignores the signal of the first key button as a sleep mode release signal (S170).

In more detail, the external keyboard 35 in the sleep mode is released from the sleep mode by the first key button.

The portable terminal 10 ignores the signal of the first key button input by the reconnection process (S170), and then feeds back to the key button recognition process (S130) to recognize the signal of the key button applied from the next order. Done.

Therefore, according to the present invention having the above configuration, using the key button recognition data frame signal shown in FIG. 5, the external keyboard 35 is recognized in the same way as the key button of the mobile terminal and the respective function buttons are used. By conveniently deploying, it is possible to easily use various additional services provided by the mobile communication system.

The present invention having the above-described configuration enables the external keyboard to be recognized as a key button of the portable terminal, thereby making it possible to easily utilize various additional services provided by the mobile communication system by using a miniaturized portable terminal and to access the Internet. There is an effect that can be facilitated.

In addition, there is an effect that can overcome the limitation of the number of buttons arranged in a miniaturized portable terminal.

Claims (5)

In the external keyboard connected to the portable terminal by RS-232E method, The portable terminal supplies an operating power to the external keyboard, determines whether the external keyboard is connected by a signal applied through a plurality of ED terminals, and terminates when it is determined that the external keyboard is not connected. If it is determined that the external keyboard is connected in the process, it is determined whether the external keyboard is still connected or connected for the first time, and if it is connected for the first time, the connection stabilization process for stabilizing by delaying for a first predetermined time; A key button recognition process of recognizing and processing a key button input signal applied from an external keyboard, A sleep process of switching to a sleep mode when a key button input signal is not received from the external keyboard for a second predetermined time. A determination process of determining whether a key button input signal is recognized in a sleep mode by the sleep process, and returning to the connection determination process if the key button input signal is not recognized; When the key button input signal is determined in the above process, the external keyboard access method of the portable terminal is characterized by comprising a reconnection process that ignores the first input key button input signal and returns to the key button recognition process. . According to claim 1, The connection determination process is characterized in that the portable terminal recognizes that an external keyboard is connected when a signal of '0' and '1' is applied through a plurality of RS terminals in a data cable of an RS-232E connection method. How to connect external keyboard of the terminal. According to claim 1, When the external keyboard is connected to the portable terminal, the connection stabilization process is delayed without receiving an input signal from the external keyboard for 1 second, which is the first setting time, and then stabilized during the first setting time. And a key button signal applied from an external keyboard, and proceeds to the sleep process if it is still connected. According to claim 1, In the key button recognition process, each key button input signal is distinguished by a toggle signal of a sequence bit, and a type of key button input by a Kisken code is checked, and a shift key button is recognized when the key is down. The remaining key buttons are recognized when the key up, the external keyboard connection method of a mobile terminal. According to claim 1, In the sleep process, when the key button signal is not applied for 5 minutes, which is the second setting time, from the external keyboard, the sleep process converts to the sleep mode to save power while keeping the power consumption of the external keyboard powered from the mobile terminal to a minimum. And when a signal of a key button is input within 5 minutes of the second setting time, proceeding to the key button recognition process.