KR20060033839A - A structure and a method and a apparatus of improving video image quality for dual folder type mobile phone - Google Patents

Abstract

The present invention outputs the received image to the main display unit and the transmission image to the sub display unit by using both dual display units of the clamshell portable terminal, and is provided integrally with the folder portion of the dual folder portable terminal and fixedly coupled in a rotating state. A sub display unit for outputting a transmission video signal; A hinge unit for fixedly coupling and electrically connecting the sub display unit and the portable terminal folder unit to a mechanical rotation state; The sub display unit and the portable terminal folder unit is integrally fixed or separated, and comprises a switch unit for detecting the coupling and disconnection state, characterized in that the structure is provided in the folder portion of the mobile terminal and the combination and separation state of the sub display unit A switch unit for detecting; A control unit for determining whether the sub display unit is in a coupled state or a separated state based on a detection signal of the switch unit, and outputting a video signal in a normal or inverted state; A separation unit which separates a transmission image and a reception image under control of a control unit, converts and outputs a text message into an optimum format of a sub display unit and a main display unit, and separates a text message; An inversion processor for inverting and outputting an image signal and a text signal output to the sub display unit under control of the controller; And a sub display unit for connecting to the control unit and outputting and displaying the video signal and the text signal which are applied in the normal state or the inverted state.

Description

Quality Improvement Structure, Device and Method of Dual Folder Handheld Terminal {A STRUCTURE AND A METHOD AND A APPARATUS OF IMPROVING VIDEO IMAGE QUALITY FOR DUAL FOLDER TYPE MOBILE PHONE}

1 is a diagram illustrating the structure of a display unit of a dual folder portable terminal according to the prior art;

2 is a view showing a display unit operation state of a dual folder portable terminal according to the prior art;

3 is a diagram illustrating an image quality improvement structure in which a sub display unit of the dual folder portable terminal of the present invention is combined;

4 is a diagram illustrating an image quality improvement structure in which a sub display unit of the dual folder portable terminal of the present invention is separated;

Fig. 5 is a state diagram of using the sub display unit image quality improving structure of the dual folder portable terminal according to the present invention;

6 is a functional diagram of an image quality improving device of the dual folder portable terminal of the present invention;

7 is a flowchart illustrating a method for improving image quality of a dual folder portable terminal according to the present invention.

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

100: portable terminal 110: folder unit 120: sub display unit

130: hinge portion 140: switch portion 150: main display portion

160: main body 200: wireless unit 210: control unit

220: memory unit 230: inversion processing unit 240: separation unit

250: camera unit

According to the present invention, video communication is performed using both dual display units of a clamshell portable terminal. In particular, the sub display unit has a rotating connection structure, and outputs and displays an image signal in the same direction as the main display unit. The present invention relates to a structure, an apparatus, and a method for improving image quality of a dual folder portable terminal using a display unit extended to a conventional limited display unit because the transmitted image is output to the sub display unit.

The mobile terminal for mobile communication (MS: MOBILE STATION) freely moves in the service area formed by the corresponding base station (RAN: RADIO ACCESS NETWORK) of the registered system and monitors and monitors the mobile switching station (MSC: MOBILE SWITCHING CENTER). It is a high-tech wireless communication device that allows individuals to carry with them at any time while always carrying a wireless connection through a communication path established by control and switching.

As described above, the portable terminal communicating while carrying and moving should ensure mobility, and in order to ensure the mobility, the size, weight, and volume of the portable terminal are reduced.

In addition, the portable terminal has various functions added to enhance the usability or applicability or operability, for example, a camera function, an MP3 function, a radio function, a game function, a calculation function, a memo function, a phone book function. Additional functions such as wireless Internet access function and additional service functions are added and attached, which makes it difficult to manufacture a portable terminal.

However, each function provided in the mobile terminal gradually requires improved performance, and in particular, as the multimedia communication system is activated, the function of the camera unit for capturing a video signal and the display performance for displaying a video signal are required. It is becoming.

In order to improve the display performance of the display unit in the portable terminal, the area of the display unit should be widened, but the area occupied by the display unit in a miniaturized portable terminal is limited.

One of the ways to reduce the external size of the mobile terminal, there is a folding type (FOLDER TYPE) to fold the mobile terminal in half, the folding type in the folded state can not check the display unit provided integrally, in the folded state In addition, a small display unit (SUB) having a small size for displaying time information, incoming information, and some operation information of the mobile terminal, and having two display units as described above are referred to as a dual display unit.

However, the foldable portable terminal uses only the main display unit and does not use the sub display unit when operating a communication or additional function service.

Accordingly, when both the main display unit and the sub display unit provided in the foldable portable terminal are used as described above, the area of the display unit is increased, and thus the image quality improvement result is expected. There is a need to develop techniques that will work.

Hereinafter, a display unit operating method of a conventional dual folder portable terminal will be described with reference to the accompanying drawings.

1 is a view illustrating the structure of a display unit of a dual folder portable terminal according to the prior art, and FIG. 2 is a view illustrating an operation state of the display unit of the dual folder portable terminal according to the prior art.

Referring to FIG. 1, the structure of a display unit of a dual folder portable terminal according to the prior art will be described. The folding portable terminal 10 inputs a circuit for operating the portable terminal, a battery unit for supplying operation power, and a voice level signal. The folder part 30 is fixedly connected in a mechanically rotated state by a hinge part 70 integrally formed at one end of the main body part 20 in which a microphone, an antenna, and the like are integrally provided, and built in the hinge part. For example, the folder unit 30 and the main body 20 are electrically connected to each other by a flexible circuit and transmit a corresponding signal.

In general, the folder unit 30 includes a speaker unit 60 for outputting an audio signal and a large size protected by the main body unit 20 in a folder state in which images, characters, symbols, and the like are output and displayed. The main display unit 40 and a small sub display unit 50 which are integrally provided on the outer surface of the folder unit 30 in a folder FOLDER that displays and folds images, characters, symbols and the like are provided.

The camera unit for capturing the video signal for transmission of the mobile terminal 10 is provided on one side of the hinge portion 70 and on one side of the folder portion 30, the position and the position according to the model (MODEL) Since the shapes are different from each other, they are not shown in detail in the drawings.

When the portable terminal 10 having the above configuration is folded in a folder state, for example, the current time information, the base station signal reception strength information, and the called party are received through the small sub-display unit 50. The information and simple information such as the received message type and the reception status display are displayed.

If you want to communicate in response to the call to the mobile terminal 10, or if you want to check the received message, or if you want to use the additional service provided through the mobile terminal 10, The folder unit 30 unfolds in a folded state in close contact with the main body unit 20, and communicates by checking the corresponding information and confirming an image using the main display unit 40 having a large and large area.

Referring to FIG. 2, in the case of multimedia communication with the mobile terminal 10, the display state of the main display unit 40 integrally provided in the folder unit 30 is illustrated. ), An image signal received from the other party is outputted and displayed as the received image 42, and, for example, an image signal transmitted in a small size is outputted and displayed as the transmission image 44 at the lower right.

Since the transmission image 44 and the reception image 42 are simultaneously displayed by using one main display unit 40 as described above, there is an advantage of simplifying the configuration of the display unit, but since a part of the reception image is hidden by the transmission image. However, there is a problem in that some of the received information cannot be confirmed.

In addition, there is a problem in that the sub display unit integrally provided on the outer surface of the folder unit cannot be used or utilized for communication.

Since the present invention is utilized in the multimedia communication using the sub display unit of the dual folder portable terminal, the screen quality is improved and the received information is accurately confirmed, and the image quality improvement of the dual folder portable terminal separating and displaying the video signal and the text signal in the multimedia communication is performed. It is an object to provide a structure, an apparatus and a method.

The present invention has been made in order to achieve the above object, the sub-display unit which is provided integrally with the folder portion of the dual folder portable terminal and fixedly coupled in a rotating state and outputs a transmission video signal; A hinge unit for fixedly coupling and electrically connecting the sub display unit and the portable terminal folder to a mechanically rotated state; And a switch unit configured to integrally couple, fix, or separate the sub display unit and the folder unit of the portable terminal, and detect a coupling and separation state.

In addition, the present invention devised to achieve the above object, the switch unit is provided in the folder portion of the portable terminal for detecting the engagement and separation state of the sub-display portion; A control unit for determining whether the sub display unit is in a coupled state or a separated state based on the detection signal of the switch unit, and outputting an image signal in a normal or inverted state; A separation unit for separating the transmission image and the reception image under the control of the control unit, converting and outputting each of the sub-display unit and the main display unit into an optimal format, and separating the text message; An inversion processing unit for inverting the video signal and the text signal output to the sub display unit under the control of the controller; And a sub display unit connected to the control unit and outputting and displaying an image signal and a text signal applied in a normal state or an inverted state.

In addition, the present invention devised to achieve the above object, the control unit of the mobile terminal comprises a start process of determining whether to perform multimedia communication when the sub display unit detects a status signal separated from the folder; A motion sickness process of outputting a received image to the main display unit and inverting the transmitted image to output the sub-display unit to the sub display unit in the case of multimedia communication; The control unit may include a text process of outputting and displaying the inverted text signal on the sub display unit when the text signal is included in the communication signal.

Hereinafter, a structure, an apparatus, and a method for improving image quality of a dual folder portable terminal according to the present invention will be described with reference to the accompanying drawings.

3 is a diagram illustrating an image quality improvement structure in which a sub display unit of a dual folder portable terminal according to the present invention is combined, and FIG. 4 is a sub display unit of the dual folder portable terminal according to the present invention. 5 is a diagram illustrating the use of the sub display unit's image quality improvement structure of the dual folder portable terminal according to the present invention, and FIG. 6 is a functional configuration diagram of the image quality improving device of the dual folder portable terminal according to the present invention. 7 is a flowchart illustrating a method for improving image quality of a dual folder mobile terminal according to the present invention.

3 to 5, the structure of the dual folder portable terminal according to the present invention will be described. The integrated unit is integrated into the folder unit 110 of the dual folder (FOLDER) portable terminal 100 for mobile communication. And a sub-display unit 120 fixedly coupled to the rotating state to output a transmission video signal, and outputting and displaying the transmission video signal applied from the folder unit 110 in a normal state or an inverted state.

The sub display unit 120 and the portable terminal folder unit 110 are fixedly coupled to each other in a mechanically rotated state and electrically connected to each other, and the portable terminal folder unit 110 and the sub display unit 120 have a mechanical axis center. It is fixedly connected in a rotating state and electrically connected to the folder unit 110 to transmit an image signal of a normal state and an inverted state. When the sub display unit 120 is separated from the folder unit 110, the main display unit ( 150 and the hinge portion 130 to be flat,

The sub display unit 120 and the portable terminal folder unit 110 are integrally fixed to or separated from each other, and the combination and separation state are detected. The sub display unit 120 and the portable terminal folder unit 110 are integrally provided in the folder unit 110 and are mechanically or use magnetic force. To physically separate and separate the folder unit 110 and the sub-display unit 120, and maintain the combined state or maintain the separated state, and detect the combined state and the separated state to detect the folder unit 110 as an electrical signal. The switch unit 140 applied to the structure is included.

Hereinafter, according to the present invention having the structure described above, the image quality improvement structure of the dual folder portable terminal will be described in detail with reference to the accompanying drawings.

The sub display unit 120 integrally provided on the outer surface of the folder unit 110 of the dual folder portable terminal 100 is fixedly coupled to the folder unit 110 in a rotational state by the hinge unit 130.

The hinge unit 130 is fixed to the folder unit 110 and fixed to the sub display unit 120, respectively, and is mechanically fixed while maintaining a state of rotating about a predetermined axis, and is connected to the folder unit 110. The sub display unit 120 is electrically connected.

The switch unit 140 is provided integrally with the folder unit 110, and maintains or separates the sub display unit 120 in a coupled state, and is a mechanical locking device structure or a structure using a magnetic force.

Since the switch unit 140 detects whether the sub display unit 120 is in a coupled state or a separated state and outputs a corresponding signal to the folder unit 110, the switch unit 140 is provided to the control unit 210 provided in the main body unit 160. It is a structure to apply.

The transmission image signal output and displayed on the sub display unit 120 is inverted by a corresponding control of the control unit 210 that recognizes the combination or separation state signal of the sub display unit 120 detected by the switch unit 140. The output is processed in a state or output in a normal state, as shown in detail in FIG.

Referring to FIG. 5 in more detail, as an example, the left side is a structural diagram in which the switch unit 140 does not detect the separation state of the sub display unit 120 and outputs the transmission video signal in a normal state. FIG. 2 is a structural diagram of the switch unit 140 detecting the separation state of the sub display unit 120 and outputting and displaying the transmitted video signal in an inverted state by the corresponding control of the control unit.

4 is a diagram illustrating a structure in which the sub display unit 120 is unfolded by the elasticity of the hinge unit 130.

Therefore, since the dual folder portable terminal according to the present invention has the structure as described above, the transmission video signal is displayed on the sub display unit 120 and the reception video signal is displayed on the main display unit 150. By using the main display unit 150 and the sub display unit 120 having a limited size, there is an advantage in that the display unit is expanded.

In addition, when the text message signal is transmitted in the state of transmitting and receiving the video signal, there is an advantage to display using the sub display unit.

Hereinafter, an image quality improving apparatus of a dual folder mobile terminal according to the present invention will be described with reference to FIG.

It is provided in the folder unit 110 of the dual folder portable terminal 100 for mobile communication to detect the combined and separated state of the sub display unit 120, the combined state and the separated state of the sub display unit 120 and the folder unit 110 A switch unit 140 for detecting and outputting a corresponding signal to the control unit 210, respectively;

The sub-display unit 120 determines whether the sub-display unit 120 is in a coupled state or a disconnected state based on the detection signal of the switch unit 140, and outputs an image signal in a normal state or an inverted state. The switch unit 140 displays the sub-display unit 120. When the separated state is detected, the camera unit 250 applies a video signal to be photographed and transmitted to the separating unit 240 to perform a format processing so as to be optimally displayed on the sub display unit 120. The processed transmission image signal is applied to the inversion processing unit 230 to be converted into an inverted state and output to the sub display unit 120. When the switch unit 140 detects the combined state of the sub display unit 120, the camera unit ( 250 reduces the video signal to be photographed and transmitted to a predetermined size, outputs it to the main display unit 150 in combination with the received video signal received by the wireless unit 200, and transmits and receives a text message in a state of transmitting and receiving the video signal. When sending and receiving simultaneously And combining and the receiver by reducing the phase signal to a predetermined size, and outputs the video signal displayed on the main display unit 150, the control unit 210 to a text message is separated displaying output to the sub-display 120,

A wireless unit 200 wirelessly connecting to a mobile communication base station RAN under the control of the controller 210 and wirelessly transmitting and receiving all communication signals including a multimedia signal;

By inverting and outputting the video signal output to the sub display unit 120 under the control of the control unit 210, the separated state detection signal of the sub display unit 120 and the folder unit 110 is applied from the switch unit 140. An inversion processor 230 for converting the multimedia transmission video signal into an inverted state in which the multimedia transmission video signal is changed up and down by the control signal of the control unit 210 which is received and outputted, and outputting it to the sub display unit 120;

A main display unit 150 connected to the control unit 210 and outputting and displaying the received video signal, and outputting and displaying an operation state signal and a text message signal by the corresponding control;

The control unit 210 separates the transmitted image and the received image and outputs them in a format suitable for each of the sub display unit and the main display unit. The control unit 210 outputs the sub display unit 120 and the folder unit from the switch unit 140. The multimedia reception video signal and the transmission video signal are separated and converted into the optimum format by the corresponding control signal that receives, analyzes, and outputs the separation state detection signal of 110. When the text message signal is applied, the video signal is output. Separated from the, and the separation unit 240 for outputting the respective format,

A camera unit 250 for photographing a subject designated by the control of the controller 210 and outputting the image as an electrical image signal;

It is connected to the control unit 210 and outputs and displays an image signal applied in a normal state or an inverted state. In the state combined with the folder unit 110 under the control of the control unit 210, the transmitted image signal is displayed in an optimal format. A sub display unit 120 for displaying the output in a normal state and outputting and displaying the transmitted video signal in an inverted state of an optimal format when the display unit 110 is separated from the folder unit 110;

A memory unit 220 connected to the control unit 210 and recording and outputting the operation program and data of the portable terminal in the allocated area is included.

Hereinafter, according to the present invention having the above-described configuration, a picture quality improving apparatus of a dual folder portable terminal will be described in detail with reference to the accompanying drawings.

When the mobile terminal 100 performs multimedia communication including a video signal, the video signal received from the counterpart is outputted and displayed on the main display unit 150, and the video signal to be captured and transmitted to the counterpart is displayed on the sub display unit 120. Since the information of the received video signal is accurately displayed, the transmitted video signal is displayed and confirmed larger, and the text message signal is transmitted and received during the transmission and reception of the video signal, the text message is transmitted using the sub display unit. It is the technique of the present invention to display.

The control unit 210 reads an operation program and data from the memory unit when the operating power is supplied, and enters an operation standby state, and monitors the switch unit 140 in the operation standby state. It is determined whether the sub display unit 120 is separated from the folder unit 110 or combined.

In the determination of the controller 210, if the sub display unit 120 is separated from the folder unit 110, the control unit 210 controls the separation unit 240 to receive the received image signal and the camera unit received by the wireless unit 200. 250 separates the transmission video signal to be transmitted to the designated counterpart, and the format of the transmission video signal is displayed on the main display unit 150 to be optimally displayed, and the received video signal is displayed on the sub display unit 120 to be optimally displayed. After format conversion, the received video signal is output and displayed on the main display unit 150 in a normal state.

The transmission image signal is applied to the inversion processor 230 to be converted into an inverted state of inverting up and down, and the inverted transmission image signal is displayed on the sub display unit 120 so that the main display unit 150 is displayed. Up and down of the video signal displayed on the parenthesis and the up and down of the video signal displayed on the sub display unit 120 coincide with each other.

That is, since the video signal received from the communication counterpart is outputted to the main display unit 150 in a normal state and displayed independently, the received video signal is accurately checked, and the video signal to be captured by the camera unit 250 and transmitted to the counterpart is The display is converted to an inverted state where the top and bottom are changed and separately output to the sub display unit 120.

In addition, when the text message communication is performed in the state in which the control unit 210 transmits and receives a video signal for communication, the control unit 210 controls the separation unit 240 to reduce the transmission video signal to a predetermined size, and the wireless unit 200. Is combined with the received video signal and output to the main display unit 150. The text message signal transmitted and received is applied to the inversion processing unit 230, and is displayed inverted up and down.

The sub display unit 120 outputs and displays a transmission video signal when communicating only with a video signal, and outputs and displays a text message signal when text message communication is performed while communicating with the video signal.

Therefore, according to the present invention having the above configuration, by using the existing dual display unit provided in the mobile terminal, the transmission image and the reception image signal are separated and displayed respectively, and when the text message communication is carried out separately from the video signal Since each output is displayed, there is an advantage of accurately displaying the communication contents.

Hereinafter, a method of improving image quality of a dual folder portable terminal according to the present invention will be described with reference to FIG. 7.

The control unit 210 of the mobile communication terminal 100 determines whether to perform multimedia communication when the sub display unit 120 detects a status signal separated from the folder unit 110. Determining whether the sub display unit 120 detects a state signal separated from the folder unit 110 from step 140; In step S100, when the separation state signal of the sub display unit 120 is detected, a start process including a process of determining whether multimedia communication for transmitting and receiving video signals is performed (S110);

In the case of multimedia communication in the start process, the received image is output to the main display unit 150, and the transmitted image is inverted and output to the sub display unit 120, respectively. Outputting and displaying the main display unit 150 (S120); Motion sickness process consisting of a step (S130) of inverting the image signal transmitted by the multimedia communication of the process (S120) and the process of inverting and changing the output to the sub display unit 120,

When the text signal is included in the communication signal, the control unit 210 outputs the reversed text signal to the sub display unit 120 to determine whether the communication unit includes the text signal. Process (S140); In the step S140, when the communication signal includes the text signal, inverting the text signal and outputting the displayed text to the sub display unit 120 (S150); It is determined that the communication of the process (S150) is completed, and if it is not completed is fed back to the start process (F110) (FEEDBACK) and if it is completed is composed of a character process consisting of the process (S160) to proceed to the end.

Hereinafter, a method of improving the image quality of a dual folder mobile terminal according to the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

The control unit 210 of the mobile terminal 100 monitors the switch unit 140, determines whether the sub display unit 120 detects a separation state from the folder unit 110, and outputs a corresponding signal (S100). In operation S100, when the control unit 210 recognizes a signal for detecting and outputting a separation state of the sub display unit 120, the control unit 210 performs multimedia communication including a video signal. Determine (S110).

In the case of multimedia communication in the determination (S110), the received image signal received through the wireless unit 200 is applied to the separating unit 240 so as to be displayed on the main display unit 150 in an optimal state. In operation S120, the formatted received image signal is output to the main display unit 150 in a normal state.

The control unit 210 of step S120 converts the format so that the sub display unit 120 displays the optimal state by applying the transmission image signal captured by the camera unit 250 to the specified counterpart to the separation unit 240. In operation S130, the format-converted signal is applied to the inversion processing unit 230 and the inverting process of changing the image is displayed on the sub display unit 120 (S130).

When the controller 210 recognizes a data signal for transmitting / receiving a text message in a multimedia communication state using a video signal (S140), the controller 210 controls the separation unit 240 to transmit the text message to the sub display unit 120. A format is processed to be displayed in an optimal state, and the inverting process of changing the upper and lower sides by applying the formatted text message data to the inversion processing unit 230, and outputting the inverted transmission and reception text message to the sub display unit And display (S150).

As described above, it is determined whether the multimedia (MULTIMEDIA) communication using the video signal or the text message signal is completed (S160). Communication is continued, and when the multimedia communication is completed, the process proceeds to end.

Accordingly, the present invention having the above-described configuration utilizes both the main display unit and the sub display unit, which are conventionally provided in the portable terminal, thereby increasing the area of the display unit used for communication, accurately checking the received video signal, and communicating the text message. In this case, there is an advantage in that the contents of the message are accurately identified because they are separately displayed.

According to the present invention having the above-described configuration, since the sub display unit provided in the portable terminal is directly used for multimedia communication, there is an industrial use effect of widening the area of the display unit and accurately displaying the transmitted signal.

In addition, in the multimedia communication of the mobile terminal, the transmission video and the reception video are separated and output to the main display unit and the sub display unit in an optimal state, respectively, and the sub display unit is displayed in the inverted state so that it is output in the same state as the main display unit. There is a convenient effect to be displayed.

In addition, when transmitting and receiving a text message in the state of transmitting and receiving a video signal, since the text message is separated and displayed separately on the sub display, there is an effect that is convenient in use to accurately check the text message communication signal.

Claims (20)

A sub display unit which is integrally provided in the folder unit of the dual folder portable terminal and fixedly coupled in a rotating state and outputs a transmission video signal; A hinge part fixedly coupled to and electrically connected to the sub display unit and the portable terminal folder unit in a mechanical rotation state; And a switch unit configured to integrally couple, fix or separate the sub display unit and the folder unit of the portable terminal, and detect a coupling and disconnection state. The display apparatus of claim 1, wherein the sub display unit is provided. The dual folder portable terminal is fixedly coupled to the folder unit in a rotational state, and the image quality improvement structure of the dual folder portable terminal, characterized in that it is configured to output and display the transmission image signal applied from the folder unit in a normal state or inverted state. . The method of claim 1, wherein the hinge portion, The dual folder portable terminal of claim 2, wherein the folder unit and the sub display unit are fixedly connected in a rotational state around the mechanical axis, and electrically connected to the folder unit to transfer the video signals in a normal state and an inverted state. Image quality improvement structure. The method of claim 3, wherein The hinge part has a structure in which the sub display part is separated from the folder part so that the hinge part becomes flat with the main display part by an elastic structure. The method of claim 1, wherein the switch unit, Dual folder carrying, characterized in that integrally provided in the folder portion, the sub-display portion is fixed or maintained in a coupled state or maintains a separated state and detects the coupled state and the separated state and applies a corresponding signal to the folder portion. Image quality improvement structure of the terminal. The method of claim 5, The switch unit may be mechanically or physically coupled to the folder unit and the sub-display unit by using a magnetic force, and detects a state and outputs an electrical signal. . A switch unit provided in the folder unit of the portable terminal for detecting the engagement and disconnection state of the sub display unit; A control unit for determining whether the sub display unit is in a coupled state or a separated state based on the detection signal of the switch unit, and outputting an image signal in a normal or inverted state; A separation unit for separating the transmission image and the reception image under the control of the control unit, converting and outputting each of the sub-display unit and the main display unit into an optimal format, and separating the text message; An inversion processing unit for inverting and outputting the video signal and the text signal output to the sub display unit under the control of the control unit; And a sub display unit connected to the control unit and outputting and displaying an image signal and a text signal which are applied in a normal state or an inverted state. The method of claim 7, wherein A wireless unit wirelessly connecting to a mobile communication base station under the control of the controller and wirelessly transmitting and receiving all communication signals including multimedia signals; A camera unit for photographing a specified subject under the control of the controller and outputting the electric object as an electrical image signal; A memory unit connected to the controller and configured to record and output an operation program and data of the portable terminal in an allocated area; And a main display unit for connecting to the control unit and outputting and displaying the received image signal. 2. The method of claim 7, wherein the switch unit, And detecting a combined state and a disconnected state of the sub display unit and the folder unit, and outputting corresponding signals to the control unit, respectively. The method of claim 7, wherein the separation unit, The control unit separates the multimedia reception video signal and the transmission video signal by a control signal that receives and outputs a separation state detection signal of the sub display unit and the folder unit from the switch unit, and the transmission image signal is displayed in the sub display unit in an optimal state. And a video signal is output to be processed by formatting the video signal so as to be optimally displayed on the main display unit. The method of claim 10, wherein the separation unit, And a text message signal and a video signal separated by a control signal of the controller, and output in a corresponding format, respectively. The method of claim 7, wherein the inversion processing unit, The control unit converts the multimedia transmission video signal and the text message signal into an inverted state in which the upper and lower sides are reversed by a control signal for receiving and outputting a separation state detection signal of the sub display unit and the folder unit from a switch unit and outputting the reverse state to the sub display unit. The device for improving the quality of a dual folder portable terminal, characterized in that consisting of. The method of claim 7, wherein the sub display unit, Under the control of the controller, the transmission image signal and the text message signal are output and displayed in a normal state while the folder unit is separated from the folder. The device for improving the quality of a dual folder portable terminal, characterized in that consisting of. The method of claim 7, wherein the control unit, When the switch unit detects the separation state of the sub display unit, the camera unit applies an image signal to be photographed and transmitted to the separation unit, and formats the image signal to be optimally displayed on the sub display unit. And a subfolder for converting to an inverted state and outputting to the sub display unit. The method of claim 14, wherein the control unit, When the switch unit detects the combined state of the sub-display unit, the camera unit reduces the video signal to be photographed and transmitted to a predetermined size, and combines with the received image signal received by the wireless unit is configured to display the output on the main display unit dual Image quality improvement device for folder portable terminal. The method of claim 14, wherein the control unit, In the case of simultaneously transmitting and receiving text messages while transmitting and receiving the video signal, the transmission video signal is reduced to a predetermined size, combined with the received video signal, and displayed on the main display, and the text message is separated and displayed on the sub display. The device for improving the quality of a dual folder portable terminal, characterized in that consisting of. The controller of the portable terminal determines whether the multimedia communication is performed when the sub display detects a status signal separated from the folder; A motion sickness process of outputting a received image to the main display unit and inverting the transmitted image to output the sub-display unit to the sub display unit in the case of multimedia communication in the above process; The control unit of the process comprises a character process for outputting and displaying the inverted text signal to the sub display unit when the text signal is included in the communication signal. The method of claim 17, wherein the starting process, Determining, by the control unit of the portable terminal, whether the sub display unit detects a state signal separated from the folder unit from the switch unit; And detecting a separation state signal of the sub display unit in the process of determining whether multimedia communication for transmitting / receiving an image signal is in progress. The method of claim 17, wherein the motion sickness process, Outputting and displaying a received image signal to a main display unit in the case of multimedia communication in the start process; The image quality improvement method of the dual folder portable terminal, characterized in that it comprises the step of inverting the image signal transmitted by the multimedia communication of the above process to change up and down and output to the sub display unit. The method of claim 17, wherein the text process, Judging whether the text signal is communicated by the controller of the motion sickness process; Inverting the text signal and outputting the text signal to the sub display unit if the text signal is included in the communication signal; Determining whether the communication of the process is completed, if not completed, returns to the start process and, if completed, proceeds to end the image quality improvement method of the dual folder portable terminal.

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