KR101531507B1 - Mobile terminal and method for controlling display thereof - Google Patents

Abstract

The present invention provides a control method of a mobile terminal including a projector and a camera capable of projecting an image in a standard shape, and a mobile terminal employing the method.

Description

[0001] MOBILE TERMINAL AND METHOD FOR CONTROLLING DISPLAY THEREOF [0002]

The present invention relates to a mobile terminal for projecting an image in a standard shape and a control method thereof.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

Generally, in order to provide an image stored in a mobile terminal to a user, an image can be displayed through a display window provided in the mobile terminal.

In this case, the user may experience an inconvenience in confirming the image due to the size limitation of the display window of the mobile terminal.

Meanwhile, the mobile terminal can transmit an image to a wired / wireless-connected external terminal (e.g., a computer) and provide the user with an image transmitted using a display unit provided in the external terminal.

However, there is a problem that it is troublesome to perform the procedure of transmitting the image to the external terminal, and it is difficult to check the image in the place where the proper external terminal is not provided.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art and to provide a mobile terminal capable of correctly providing an enlarged image in a mobile terminal without transmitting an image to the external terminal.

According to another aspect of the present invention, there is provided a method of controlling a mobile terminal, including projecting a predetermined image onto a screen in a projector module included in the mobile terminal, Reading the shape of the screen from the photographed screen image, comparing the shape of the read screen with a standard shape, and correcting the image if the shape of the screen differs from the standard shape, And projecting the corrected image onto the screen.

According to another aspect of the present invention, there is provided a mobile terminal including a projector module for projecting a predetermined image onto a screen, a camera for photographing the screen, a control unit for reading the shape of the screen from the captured screen image, An image processing module for comparing the shape of the screen with a standard shape and correcting the image if the shape of the screen is different from a standard shape; and an output unit for projecting the corrected image onto the screen.

The present invention relates to a method for correcting an image by comparing a screen shape with a standard shape after capturing a screen with a camera when the image is distorted due to the image projection direction of the projector and the screen being not perpendicular to each other, The original image is projected onto the screen so that the original image can be outputted, and the original image can be projected without distortion.

In particular, when a projector is used in a mobile terminal, the screen is often not properly installed. The present invention has the effect of enabling a user to use the projector of the mobile terminal without any sense of rejection by projecting the image correctly even in such circumstances.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation.

Description of FIG. 1 - Overall Configuration

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). Of course, the broadcast receiving module 111 may be configured to be suitable for other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141.

The output unit 150 is for generating an output relating to visual, auditory or tactile sense and includes a display unit 151, an acoustic output module 152, an alarm unit 153, a haptic module 154, 155, and the like.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or in the vicinity thereof without mechanical contact using an electromagnetic force or an infrared ray. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The projector module 155 is an element for performing an image project function using the mobile terminal 100 and may be configured to display the entire image displayed on the display unit 151 or the entire image displayed on the display unit 151 according to a control signal of the controller 180 Part can be enlarged and displayed on an external screen.

Specifically, the projector module 155 includes a light source (not shown) for generating light for outputting an image to the outside, a display means (not shown) for displaying an image upon receiving light generated by the light source, And a lens (not shown) for magnifying and outputting an image displayed on the liquid crystal display panel at a predetermined focal distance. Thus, the image output from the lens can be magnified displayed on the external screen.

The projector module 155 may be a CRT (Cathode Ray Tube) module, an LCD (Liquid Crystal Display) module or a DLP (Digital Light Processing) module depending on the type of the display means. ≪ / RTI > In particular, the DLP module may be advantageous in downsizing the projector module 151 by using a short structure in such a manner that light generated from a light source is filtered to reflect an image displayed on a DMD (Digital Micromirror Device) have.

Preferably, the projector module 155 may be provided longitudinally on the side, front or back side of the mobile terminal 100. Needless to say, the projector module 155 may be provided at any position of the mobile terminal 100, if necessary.

The projector module 155 of the mobile terminal according to the present invention projects a predetermined image onto a screen, and the camera 121 can take a screen.

The image processing module 182 reads the shape of the screen from the photographed screen image, compares the shape of the read screen with the standard shape, and corrects the image if the shape of the screen is different from the standard shape.

At this time, the image processing module 182 can recognize the shape of the outline of the screen from the photographed screen image, and can read the shape of the screen.

Also, according to an embodiment, the image processing module 182 may compare the read screen and the standard shape, calculate the distortion rate of the screen, and use the distortion to correct the image. At this time, the image processing module 182 can compare the read screen and the standard shape, calculate the distortion rate of the screen, and apply the distortion rate to the image to correct the image.

Further, according to the embodiment, the image processing module 182 may correct the shape of the screen to the standard shape, and then generate correction data and correct the image using the correction data. At this time, the image processing module 182 may correct the shape of the screen to a standard shape, and then generate correction data and apply the correction data back to correct the image.

The process of image correction in the image processing module 182 will be described in detail with reference to FIG.

The output unit 150 projects the corrected image onto the screen.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

Description of FIG. 2 - Instrument Description

2A is a perspective view of an example of a mobile terminal or a mobile terminal according to the present invention.

The disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The display unit 151, the sound output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, the interface 170, and the like may be disposed in the front body 101 have.

The display unit 151 occupies most of the main surface of the front case 101. An audio output unit 151 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132 and the interface 170 may be disposed on the side surfaces of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the portable terminal 100 and may include a plurality of operation units 131 and 132. The operation units 131 and 132 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

The contents inputted by the first or second operation unit 131 or 132 may be variously set. For example, the first operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the sound output unit 152 or the size of the sound output from the display unit 151 To the touch recognition mode of the touch screen.

FIG. 2B is a rear perspective view of the portable terminal shown in FIG. 2A.

Referring to FIG. 2B, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2A), and may be a camera having different pixels from the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is desirable to have pixels at a high level. The cameras 121 and 121 'may be installed in the terminal body so as to be rotatable or pop-upable.

A flash 123 and a mirror 124 are additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output unit 152 'may implement the stereo function together with the sound output unit 152 (see FIG. 2A), and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for a call or the like, a broadcast signal reception antenna 124 may be additionally disposed on the side of the terminal body. The antenna 124 constituting a part of the broadcast receiving module 111 (see FIG. 1) may be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the portable terminal 100 is mounted on the terminal body. The power supply unit 190 may be built in the terminal body or may be detachable from the outside of the terminal body.

The rear case 102 may further include a touch pad 135 for sensing a touch. The touch pad 135 may also be of a light transmission type like the display unit 151. [ In this case, if the display unit 151 is configured to output time information on both sides, the time information can be recognized through the touch pad 135 as well. The information output on both sides may be all controlled by the touch pad 135. [ Alternatively, a display may be additionally mounted on the touch pad 135, and a touch screen may be disposed on the rear case 102 as well.

The touch pad 135 operates in correlation with the display portion 151 of the front case 101. The touch pad 135 may be disposed parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

Description of FIG. 3 - Front, Rear Touch

Hereinafter, a related operation of the display unit 151 and the touch pad 135 will be described with reference to FIGS. 3A and 3B.

3A and 3B are front views of a portable terminal for explaining an operation state of the portable terminal according to the present invention.

Various types of time information can be displayed on the display unit 151. [ These pieces of information can be displayed in the form of letters, numbers, symbols, graphics, or icons.

At least one of the letters, numbers, symbols, graphics, or icons may be displayed in a predetermined arrangement for inputting such information, thereby being implemented as a keypad. Such a keypad may be called a so-called " soft key ".

FIG. 3A shows a touch input to a soft key through a front surface of a terminal body.

The display unit 151 may operate as an entire area or may be divided into a plurality of areas and operated. In the latter case, the plurality of areas can be configured to operate in association with each other.

For example, an output window 151a and an input window 151b are displayed on the upper and lower portions of the display unit 151, respectively. The output window 151a and the input window 151b are areas allocated for outputting or inputting information, respectively. In the input window 151b, a soft key 151c in which a number for inputting a telephone number or the like is displayed is output. When the soft key 151c is touched, a number corresponding to the touched soft key is displayed on the output window 151a. When the first operation unit 131 is operated, call connection to the telephone number displayed on the output window 151a is attempted.

FIG. 3B shows the input of a touch applied to the soft key through the rear surface of the terminal body. FIG. 3A shows a case where the terminal body is vertically arranged, and FIG. 3B shows a case where the terminal body is arranged horizontally. The display unit 151 may be configured to convert the output screen according to the arrangement direction of the terminal body.

3B shows that the text input mode is activated in the portable terminal. The display unit 151 displays an output window 151a 'and an input window 151b'. In the input window 151b ', a plurality of soft keys 151c' displayed with at least one of letters, symbols, and numbers may be arranged. The soft keys 151c 'may be arranged in the form of a QWERTY key.

When the soft keys 151c 'are touched through the touch pad 135 (see FIG. 2B), characters, numbers, symbols corresponding to the touched soft keys are displayed on the output window 151a'. As described above, the touch input through the touch pad 135 is advantageous in that the soft key 151c 'can not be blocked by the finger when the touch is input, compared to the touch input through the display unit 151. [ In the case where the display unit 151 and the touch pad 135 are formed to be transparent, the fingers located on the rear side of the terminal body can be visually confirmed, thereby enabling a more accurate touch input.

The display unit 151 or the touch pad 135 may be configured to receive a touch input by scrolling, as well as the input method described in the above embodiments. The user can move a cursor or a pointer located on an object displayed on the display unit 151, for example, an icon or the like, by scrolling the display unit 151 or the touch pad 135. [ Further, when the finger is moved on the display portion 151 or the touch pad 135, the path along which the finger moves may be visually displayed on the display portion 151. [ This will be useful for editing the image displayed on the display unit 151. [

One function of the terminal may be executed in response to a case where the display unit 151 (touch screen) and the touch pad 135 are touched together within a predetermined time range. In the case of being touched together, there may be a case where the user clamps the terminal body using the thumb and index finger. The one function may be activation or deactivation of the display unit 151 or the touch pad 135, for example.

Description of FIG. 4 - Proximity Touch

The proximity sensor 141 described with reference to Fig. 1 will be described in more detail with reference to Fig.

4 is a conceptual diagram for explaining the proximity depth of the proximity sensor.

As shown in FIG. 4, when a pointer such as a user's finger, a pen, or the like approaches the touch screen, the proximity sensor 141 disposed in or near the touch screen senses the proximity sensor and outputs a proximity signal.

The proximity sensor 141 may be configured to output different proximity signals according to the distance between the proximity-touched pointer and the touch screen (hereinafter referred to as "proximity depth").

In FIG. 4, for example, a cross-section of a touch screen having proximity sensors capable of sensing three proximity depths is illustrated. Of course, proximity sensors that detect less than three or more than four proximity depths are also possible.

Specifically, when the pointer is completely in contact with the touch screen (d ₀ ), it is recognized as a contact touch. If the pointer is located on the touch screen at a distance less than the distance d ₁ , it is recognized as a proximity touch of the first proximity depth. If the pointer is located on the touch screen at a distance of d ₁ or more and less than distance d ₂ , it is recognized as a proximity touch of the second proximity depth. If the pointer is located on the touch screen at a distance of d ₂ or more and less than d ₃ distance, it is recognized as a proximity touch of the third proximity depth. If the pointer is positioned apart from the touch screen by a distance d ₃ or more, it is recognized that the proximity touch is released.

Accordingly, the controller 180 can recognize the proximity touch as various input signals according to the proximity depth and proximity position of the pointer, and perform various operation control according to the various input signals.

Description of FIG. 5 - Transparent Touch

5 is a conceptual diagram for explaining a control method for a touch operation in a form in which a pair of display units 156 and 157 are overlapped.

The terminal shown in this figure is a folder type terminal connected to a main body so that a folder portion is foldable. The first display unit 156 mounted on the folder unit may be of a light transmitting type or a transparent type such as TOLED or the second display unit 157 mounted on the main body may be a form that does not transmit light like an LCD. The first and second display units 156 and 157 may be configured as a touch screen capable of touch input.

For example, when a touch (contact touch or proximity-touch) is detected with respect to the first display unit or the TOLED 156, At least one of the image lists displayed in the TOLED 156 may be selected or run.

Hereinafter, with respect to the manner in which the information displayed on the other display unit or the LCD 157 is controlled when touching the TOLED 156 exposed to the outside in an overlapped form, a touch, a long touch, a long touch and drag ), And so on.

In the overlapped state (the mobile terminal is in a closed state), the TOLED 156 is disposed in an overlapped manner on the lower side of the LCD 157. [ In this state, if a touch such as a long touch (for example, a touch that lasted for 2 seconds to 3 seconds) is detected in a manner different from the touch for controlling the image displayed on the TOLED 156 in advance, ) Causes at least one image of the image list displayed on the LCD 157 to be selected according to the sensed touch input. The result of the execution of the selected image is displayed on the TOLED 156.

The long touch may also be used to selectively move a desired one of the entities displayed on the LCD 157 to the TOLED 156 (without performing an execution operation therefor). That is, when a user selects one area of the TOLED 156 corresponding to a specific entity of the LCD 157 In the case of a long touch, the control unit 180 moves the corresponding object to the TOLED 156 to be displayed. The entity displayed on the TOLED 155 may also be displayed on the LCD 157 in accordance with a predetermined touch input to the TOLED 156, for example, flicking, swirling, and the like. In this drawing, the menu No. 2 displayed on the LCD 156 is displayed on the TOLED 156.

If another input, for example a drag, is detected in addition to the long touch, the control unit 180 is a function related to the image selected by the long touch, for example, a preview screen for the image is displayed on the TOLED 156. [ As shown in FIG. In this drawing, a case where a preview (male photograph) is performed on the menu No. 2 (image file) is illustrated.

The control unit 180 displays a selection cursor (or a selection bar) of the LCD 157 in a state in which the preview screen is outputted while maintaining the long touch and further dragging the TOLED 156 toward another image And displays the image selected by the selection cursor on a preview screen (female photograph). Thereafter, when the touch (long touch and drag) ends, the controller 180 displays the first image selected by the long touch.

When the slide (the operation of the proximity touch corresponding to the drag) is detected together with the long proximity touch (the proximity touch continuing for at least 2 seconds to 3 seconds) to the TOLED 156, the touch operation (long touch and drag) .

When a touch operation other than those described above is detected, the controller 180 can operate in the same manner as a general touch control method.

The control method for the touch operation in the overlapped form can be applied to a terminal having a single display. In addition, the present invention can be applied to a terminal different from a folder type having a dual display.

Description of Figure 6 -

FIGS. 6A and 6B are views referred to the description of the proximity touch recognition area where the proximity signal is detected and the haptic area where the tactile effect occurs.

6A shows objects such as icons and menu items in a circular form for convenience of explanation. The area of the object displayed on the display unit 151 can be divided into a first area A in the center and a second area B surrounding the center area as shown in FIG. 6A. The first region A and the second region B can be configured to generate tactile effects having different intensities or patterns. For example, when the second region B is touched, a first vibration is output, and when the first region A is touched, a second vibration larger than the first vibration is output.

In the case where the proximity touch recognition area and the haptic area are simultaneously set in the area where the object is displayed, the haptic area where the tactile effect is generated and the proximity touch area where the proximity signal is detected Can be set differently. That is, the haptic area may be set narrower than the proximity touch recognition area, or the haptic area may be set wider than the proximity touch recognition area. For example, in (a) of FIG. 6A, the area including the first area A and the second area B may be a proximity touch recognition area, and the first area A may be set as a haptic area.

(N > 4) as shown in Fig. 6 (a), as shown in Fig. 6 (b) It is also possible to divide into two areas. Each divided region can be configured to generate a tactile effect with different intensities or patterns. Even when the area in which one object is displayed is divided into three or more areas, the haptic area and the proximity touch recognition area can be set differently according to the use environment.

The size of the proximity touch recognition area may be changed depending on the proximity depth to the display unit 151. [ That is, as shown in (a) of FIG. 6, the corresponding proximity touch recognition area may be gradually reduced to 'C', 'B', and 'A' according to the proximity depth to the display unit 151, Or the contiguous touch recognition area corresponding to the proximity depth to the display unit 151 may be gradually increased. In this case as well, the haptic area can be set to a constant size regardless of the proximity depth to the display unit 151, such as the 'H' area shown in FIG. 6B (b).

 In the case of dividing the area in which the object is displayed for the setting of the haptic area or the proximity touch recognition area, in addition to the concentric segmentation as shown in Fig. 6A, segmentation in the horizontal direction or vertical direction, radial segmentation, And various methods such as partitioning can be used.

[Invention - Image correction projector terminal]

7 is a flowchart illustrating a control procedure of a mobile terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the projector module 155 of the mobile terminal according to the embodiment of the present invention projects a predetermined image onto a screen in step S701.

8 is a diagram illustrating an embodiment of projecting an image in a mobile terminal according to the present invention. Referring to FIG. 8, the projector module 801 and the camera 802 of the mobile terminal of the present invention are arranged in the same direction, and the image projected from the projector module 801 to the screen can be photographed by the camera 802.

At this time, if the screen is not perpendicular to the angle at which the image is projected on the projector module, the image may appear distorted.

9 is a view showing an example in which an image projected from a projector module is distorted.

Referring to FIG. 9, if the direction in which the image is projected in the projector module and the screen are not perpendicular to each other, the original image 903 may be distorted to appear as a screen shape 904. For example, the original image 903 has a rectangular shape, and the screen shape 904 may be output as a trapezoid.

In such a case, the camera photographs the screen in step S702. At this time, the mobile terminal can perform steps S702 to S706 only when the user selects 'image correction' in the user interface.

Next, in step S703, the mobile terminal reads the shape of the screen from the photographed screen image, and compares the shape of the read screen with the standard shape. Information about the standard shape may be stored in memory 160 of the mobile terminal and the mobile terminal may load data for the standard shape and compare it with the read screen shape.

 At this time, the mobile terminal can recognize the shape of the outline of the screen in the screen image to read out the shape of the screen. For example, since the brightness value of the background and the brightness value of the screen on which the image is output may be very different, The terminal can recognize the shape of the outline of the screen using the brightness value difference.

10 is a diagram illustrating an embodiment of reading a shape of a screen in a mobile terminal according to the present invention.

Referring to FIG. 10, a mobile terminal can recognize a shape 1001 of a screen outline, that is, a shape of a screen, in a screen image.

If the shape of the screen is recognized, the mobile terminal compares the shape of the screen with the previously stored standard shape to determine whether or not the shape conforms. The standard shape is a shape to be compared with the shape of the screen, and may be, for example, a rectangular shape or a square shape.

If it is determined in step S703 that the shape of the screen differs from the standard shape, the mobile terminal corrects the image in step S704.

According to an embodiment, various image processing programs or tools can be used for image correction. For example, the mobile terminal compares the read screen with the standard shape, calculates the distortion rate of the screen, The image can be corrected.

For example, if the standard shape is rectangular and the read screen shape is trapezoidal, the mobile terminal computes the distortion of the trapezoid relative to the rectangle and applies the calculated distortion rate back to the image to correct the image. At this time, the calculation of the distortion rate can be performed using a predetermined tool or a program.

Also, according to the embodiment, the mobile terminal can correct the original image using the correction data after correcting the shape of the screen to the standard shape.

For example, the mobile terminal can correct the original image by correcting the trapezoidal screen shape to a rectangular standard shape, then generating the correction data used for correction, and applying the correction data back to the image. At this time, the generation of the correction data and the correction of the image can be performed using a predetermined tool or a program.

11 is a diagram illustrating an example of correcting an image in a mobile terminal of the present invention.

Referring to FIG. 11, the mobile terminal of the present invention can correct the original image 1101 and apply a distortion rate inversely or generate a corrected image 1102 to which correction data is applied inversely. In the above example, the mobile terminal can correct the original image in an inverted trapezoid.

In step S705, the mobile terminal projects the corrected image onto the screen. At this time, the corrected image is projected onto the original image when projected on the screen.

12 is a view illustrating an embodiment in which a corrected image is projected on a screen in a mobile terminal according to the present invention. Referring to FIG. 12, the corrected image 1201 in the mobile terminal is projected onto the original image 1202 when projected on a screen.

In this example, the mobile terminal projects an image corrected with an inverse trapezoid on a screen, and the image projected onto the screen may be viewed as a rectangle.

Accordingly, in a mobile terminal including a projector, when an image is distorted due to an image projection direction of the projector and a screen are not perpendicular to each other, a screen is shot with a camera, and then the image is corrected by comparing the screen shape and the standard shape , The corrected image is projected onto the screen so that the original image can be outputted, and the original image can be projected without distortion.

In particular, when a projector is used in a mobile terminal, the screen is often not properly installed. The present invention has the effect of enabling a user to use the projector of the mobile terminal without any sense of rejection by projecting the image correctly even in such circumstances.

Further, according to an embodiment of the present invention, the above-described method can be implemented as a code that can be read by a processor on a medium on which the program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (e.g., transmission over the Internet) .

The above-described mobile terminal and its control method are not limited to the configuration and method of the above-described embodiments, but the embodiments may be modified such that all or some of the embodiments are selectively And may be configured in combination.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

FIG. 2A is a front perspective view of a portable terminal according to an embodiment of the present invention; FIG.

FIG. 2B is a rear perspective view of a portable terminal according to an embodiment of the present invention; FIG.

3A and 3B are front views of a portable terminal for explaining an operation state of the portable terminal according to the present invention.

4 is a conceptual diagram for explaining the proximity depth of the proximity sensor.

5 is a conceptual diagram for explaining a control method for a touch operation in a form in which a pair of display units are overlapped.

6A and 6B are conceptual diagrams for explaining a proximity touch recognition area where a proximity signal is detected and a haptic area for generating a tactile effect, respectively.

7 is a flowchart illustrating a control procedure of a mobile terminal according to an exemplary embodiment of the present invention.

8 is a diagram illustrating an embodiment of projecting an image in a mobile terminal according to the present invention.

9 is a view showing an embodiment in which an image projected from the projector module is distorted;

10 illustrates an embodiment of reading the shape of a screen in a mobile terminal according to the present invention.

11 is a view illustrating an example of correcting an image in a mobile terminal of the present invention.

12 illustrates an embodiment in which a corrected image is projected onto a screen in a mobile terminal according to the present invention.

Claims (12)

Projecting a predetermined image onto a screen in a projector module included in the mobile terminal; Capturing the screen from a camera included in the mobile terminal; Reading a shape of the screen by recognizing a shape of a screen outline by using a brightness value of a background and a brightness value of the screen in the photographed screen image; Comparing the shape of the read screen to a standard shape and then correcting the image if the shape of the screen is different from a standard shape; And Projecting the corrected image onto the screen Wherein the mobile terminal is a mobile terminal. delete The method according to claim 1, Comparing the shape of the read screen to a standard shape and then correcting the image if the shape of the screen is different from the standard shape, Comparing the read screen with the standard shape, calculating a distortion rate of the screen, and correcting the image using the distortion rate Wherein the mobile terminal is a mobile terminal. The method of claim 3, Comparing the shape of the read screen to a standard shape and then correcting the image if the shape of the screen is different from the standard shape, Comparing the read screen with the standard shape, calculating a distortion rate of the screen, and applying the distortion rate back to the image Wherein the mobile terminal is a mobile terminal. The method according to claim 1, Comparing the shape of the read screen to a standard shape and then correcting the image if the shape of the screen is different from the standard shape, Wherein the controller corrects the shape of the screen to the standard shape, generates correction data, and corrects the image using the correction data. 6. The method of claim 5, Comparing the shape of the read screen to a standard shape and then correcting the image if the shape of the screen is different from the standard shape, Wherein the controller corrects the shape of the screen to the standard shape, generates correction data, and corrects the image by applying the correction data inversely. A projector module for projecting a predetermined image onto a screen; A camera for photographing the screen; The shape of the screen is read by recognizing the shape of the outline of the screen by using the brightness value of the background and the brightness value of the screen in the taken screen image and comparing the shape of the read screen with the standard shape, An image processing module for correcting the image if the shape is different from the standard shape; And An output unit for projecting the corrected image onto the screen, To the mobile terminal. delete 8. The method of claim 7, The image processing module comprising: Compares the read screen with the standard shape, calculates a distortion rate of the screen, and corrects the image using the distortion rate. 10. The method of claim 9, The image processing module comprising: Compares the read screen with the standard shape, calculates a distortion rate of the screen, and applies the distortion rate to the image inversely. 8. The method of claim 7, The image processing module comprising: Wherein the correction unit corrects the shape of the screen to the standard shape, generates correction data, and corrects the image using the correction data. 12. The method of claim 11, The image processing module comprising: Wherein the correction unit corrects the shape of the screen to the standard shape, generates correction data, and corrects the image by applying the correction data inversely.

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