KR20100081406A - Mobile terminal and method for inputting instructions thereto - Google Patents

Abstract

PURPOSE: A mobile terminal having projector module and a command input method thereof are provided to control the mobile terminal without passing through a user input unit equipped to a main body, thereby performing direct control on an external screen. CONSTITUTION: A projector module(155) projects an image having a control area on the external screen. A camera(121) comprises zoom function for photographing the external screen. When a pointer is located in the image, a control unit(180) recognizes a location of the point through the camera and changes zoom ratio of the camera according to the location of the recognized pointer. When the pointer is located in the control area, the control unit photographs the external screen with a second magnification higher than a first magnification.

Description

MOBILE TERMINAL AND METHOD FOR INPUTTING INSTRUCTIONS THERETO}

The present invention relates to a mobile terminal, and more particularly, to a method for inputting a predetermined command to a mobile terminal having a projector module and a camera, and a mobile terminal capable of implementing the same.

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 may be further classified into a handheld terminal and a vehicle mount terminal according to whether a user can directly carry it.

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 increase the function of such a terminal, it may be considered to improve the structural part and / or the software part of the terminal. Accordingly, the terminal is equipped with an increasingly complex user input unit capable of performing all the various functions.

The present invention is to provide a mobile terminal and a command input method thereof that can more conveniently input a user command on an external screen in operating various functions of the mobile terminal.

A mobile terminal according to an embodiment of the present invention for realizing the above object includes a projector module for projecting a predetermined image having at least one control area on an external screen, a camera having a zoom function for capturing the external screen, and And a control unit for recognizing the position of the pointer through the camera when the pointer is positioned on the image, and controlling the zoom ratio of the camera to be different depending on whether the position of the pointer is on the control area.

The controller of the mobile terminal may be configured to capture the external screen at the first magnification when the pointer is not located in the control area, and to set the camera to a higher magnification when the pointer is located at the control area. The second screen may be controlled to play the external screen.

The controller may control the camera to photograph the entire external screen at a first magnification and to photograph a portion of the external screen including a control area in which the pointer is located at a second magnification.

The controller may further recognize a touch or touch pattern on a point indicated by the pointer by using the image captured by the camera at a second magnification including the control area, and recognize the touch point or touch pattern. The control corresponding to the control may be performed.

The mobile terminal according to at least one embodiment of the present invention configured as described above is convenient to control directly on an external screen without passing through the user input unit provided in the main body in controlling the mobile terminal.

Hereinafter, a mobile terminal according to the present invention will be described in more detail with reference to the accompanying drawings. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other.

The mobile terminal described herein may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, and the like. However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein may also be applied to fixed terminals such as digital TVs, desktop computers, etc., except when applicable only to mobile terminals.

[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 A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. The components shown in FIG. 1 are not essential, so that 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 that enable wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and a 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 a broadcast signal 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 mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a previously generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

The broadcast related information may mean information related to a broadcast channel, a broadcast program, or 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, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 may include, for example, Digital Multimedia Broadcasting-Terrestrial (DMB-T), Digital Multimedia Broadcasting-Satellite (DMB-S), Media Forward Link Only (MediaFLO), and Digital Video Broadcast (DVB-H). Digital broadcast signals can be received using digital broadcasting systems such as Handheld and Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast receiving module 111 may be configured to be suitable for not only the above-described digital broadcasting system but also other broadcasting systems.

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 a wireless signal with 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 according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless internet module 113 refers to a module for wireless internet access and may be embedded or external to the mobile terminal 100. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

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

Referring to FIG. 1, the A / V 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 call mode or the photographing mode. The processed image frame may 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 according to the use environment.

The microphone 122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 112 and output in the call mode. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

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

The sensing unit 140 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a location of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate 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 may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. The sensing unit 140 may include a proximity sensor 141.

The output unit 150 is used to generate an output related to visual, auditory or tactile senses, which includes a display unit 151, an audio output module 152, an alarm unit 153, a haptic module 154, and a projector module ( 155) may be included.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in a call mode, the mobile terminal displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the mobile terminal 100 is in a video call mode or a photographing mode, the mobile terminal 100 displays photographed and / or received images, a UI, and a GUI.

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible). and at least one of a 3D display.

Some of these displays can be configured to be transparent or light transmissive so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display is TOLED (Transparant OLED). The rear structure of the display unit 151 may also be configured as a light transmissive structure. With this structure, the user can see the 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 implementation form 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 one another, and may be disposed on different surfaces, respectively.

When the display unit 151 and a sensor for detecting a touch operation (hereinafter, referred to as a “touch sensor”) form a mutual layer structure (hereinafter referred to as a “touch screen”), the display unit 151 may be used in addition to an output device. Can also be used as an input device. The touch sensor may have, for example, a form of a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in pressure applied to a specific portion of the display unit 151 or capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor may be configured to detect not only the position and area of the touch but also the pressure at the 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 then transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

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 an object present in the vicinity without using a mechanical contact by using an electromagnetic force or infrared rays. Proximity sensors have a longer life and higher utilization than touch sensors.

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

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the proximity touch is performed by the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in proximity proximity.

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

The sound 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, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 152 may also output a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the mobile terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than a video signal or an 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 151 and 152 may be classified as part of the alarm unit 153.

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

In addition to vibration, the haptic module 154 may be configured to provide a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through the jetting or suction port, grazing to the skin surface, contact of the electrode, electrostatic force, and the like. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 154 may not only deliver the haptic effect through direct contact, but also may implement the user to feel the haptic effect through a muscle sense such as a finger or an arm. Two or more haptic modules 154 may be provided according to a configuration aspect of the mobile terminal 100.

The projector module 155 is a component for performing an image project function using the mobile terminal 100 and is similar to the image displayed on the display unit 151 in accordance with a control signal of the controller 180 Or at least partly display another image on an external screen or wall.

In detail, the projector module 155 may include a light source (not shown) for generating light (for example, laser light) for outputting the image to the outside, and an image for output to the outside using the light generated by the light source. And an image generating means (not shown), and a lens (not shown) for expanding and outputting the image to the outside at a predetermined focal length. Further, the projector module 155 may include a device (not shown) capable of mechanically moving the lens or the entire module to adjust the image projection direction.

The projector module 155 can be divided into a CRT (Cathode Ray Tube) module, an LCD (Liquid Crystal Display) module and a DLP (Digital Light Processing) module according to the type of the display means. In particular, the DLP module may be advantageous for miniaturization of the projector module 151 by enlarging and projecting an image generated by reflecting light generated from a light source on a DMD (Digital Micromirror Device) chip.

Preferably, the projector module 155 may be provided longitudinally on the side, front or back side of the mobile terminal 100. It goes without saying that the projector module 155 may be provided at any position of the mobile terminal 100 as occasion demands.

The memory unit 160 may store a program for processing and controlling the controller 180, and temporarily stores input / output data (for example, a phone book, a message, an audio, a still image, a video, etc.). It can also perform a function for. The memory unit 160 may also store the frequency of use of each of the data (for example, each telephone number, each message, and frequency of use for each multimedia). In addition, the memory unit 160 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

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), RAM (Random Access Memory, RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Memory, Magnetic It may include a storage medium of at least one type of disk, optical disk. The mobile terminal 100 may operate in connection with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device, receives power, transfers the power to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an 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 that stores various types of information for authenticating the usage rights of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identify module (SIM), and a universal user authentication module ( Universal Subscriber Identity Module (USIM), and the like. The device equipped with the identification module (hereinafter referred to as 'identification device') may be manufactured in the form of a smart card. Therefore, the identification device may be connected to the terminal 100 through a port.

The interface unit may be a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals input from the cradle by a user may be transferred. It may be a passage that is delivered to the terminal. Various command signals or power input from the cradle may be operated as signals 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, perform related control and processing for voice calls, data communications, video calls, and the like. The controller 180 may include a multimedia module 181 for playing multimedia. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The controller 180 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on the touch screen as text and an image, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

Various embodiments described herein may be implemented 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, embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions. The described embodiments may be implemented by the controller 180 itself.

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

[Description on Fig. 2-Instrument Description]

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

The disclosed portable terminal 100 has a terminal body in the form of a bar. However, the present invention is not limited thereto and may be applied to various structures such as a slide type, a folder type, a swing type, a swivel type, and two or more bodies are coupled to be relatively movable.

The body includes a casing (casing, housing, cover, etc.) that forms an exterior. In this embodiment, the case may be divided into a front case 101 and a rear case 102. Various electronic components are built in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be further disposed between the front case 101 and the rear case 102.

The cases may be formed by injecting synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

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

The display unit 151 occupies most of the main surface of the front case 101. A sound 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 side surfaces of the front case 101 and the rear case 102.

The user input unit 130 is manipulated 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 manipulation units 131 and 132 may also be collectively referred to as manipulating portions, and may be employed in any manner as long as the user is tactile in a tactile manner.

Content input by the first or second manipulation units 131 and 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 additionally mounted on the rear 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 has a low pixel so that the user's face is photographed and transmitted to the counterpart in case of a video call, and the camera 121 'photographs a general subject and does not transmit it immediately. It is desirable to have a high pixel because there are many. 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 further disposed adjacent to the camera 121 '. The flash 123 shines light toward the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to see his / her own face or the like when photographing (self-photographing) the user by using the camera 121 '.

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

The antenna 116 for receiving a broadcast signal may be additionally disposed on the side of the terminal body. The antenna 116, which forms part of the broadcast receiving module 111 (see FIG. 1), can 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 embedded in the terminal body or may be directly detachable from the outside of the terminal body.

The rear case 102 may be further equipped with a touch pad 135 for sensing a touch. Like the display unit 151, the touch pad 135 may also be configured to have a light transmission type. In this case, if the display unit 151 is configured to output visual information from both sides, the visual information may be recognized through the touch pad 135. The information output on both surfaces may be 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.

[Description on Fig. 3-Front, Back Touch]

Hereinafter, the 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.

In order to input such information, at least one of the letters, numbers, symbols, graphics, or icons may be displayed in a predetermined arrangement so as to be implemented in the form of a keypad. Such a keypad may be called a 'virtual keypad'.

3A illustrates receiving a touch applied to the virtual keypad through the front of the terminal body.

The display unit 151 may operate in an entire area or may be operated in a divided manner. 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. The input window 151b outputs a virtual keypad 151c in which numbers for inputting a telephone number or the like are displayed. When the virtual keypad 151c is touched, numbers and the like corresponding to the touched virtual keypad are displayed on the output window 151a. When the first manipulation unit 131 is operated, a call connection to the telephone number displayed on the output window 151a is attempted.

3B illustrates receiving a touch applied to the virtual keypad through the rear of the terminal body. If FIG. 3A is a portrait in which the terminal body is arranged vertically, FIG. 3B illustrates a landscape in which 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 mobile terminal. The display unit 151 displays an output window 151a 'and an input window 151b'. A plurality of virtual keypads 151c 'displaying at least one of letters, symbols, and numbers may be arranged in the input window 151b'. The virtual keypads 151c 'may be arranged in the form of a QWERTY key.

When the virtual keypads 151c 'are touched through the touch pad 135 (refer to FIG. 2B), letters, numbers, and symbols corresponding to the touched virtual keypads are displayed on the output window 151a'. As described above, the touch input through the touch pad 135 has an advantage of preventing the virtual keypad 151c 'from being covered by the finger when touched, as compared with the touch input through the display unit 151. When the display unit 151 and the touch pad 135 are transparent, the fingers located at the rear of the terminal body can be visually checked, and thus more accurate touch input is possible.

In addition to the input methods disclosed in the above embodiments, the display unit 151 or the touch pad 135 may be configured to receive a touch input by scrolling. By scrolling the display unit 151 or the touch pad 135, the user may move an object displayed on the display unit 151, for example, a cursor or a pointer located at an icon. In addition, when the finger is moved on the display unit 151 or the touch pad 135, a path along which the finger moves may be visually displayed on the display unit 151. This may be useful for editing an 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. For example, the function may include activation or deactivation of the display unit 151 or the touch pad 135.

[Description on Figure 4-Proximity Touch]

The proximity sensor 141 described with reference to FIG. 1 will be described in more detail with reference to FIG. 4.

4 is a conceptual diagram illustrating a proximity depth of a proximity sensor.

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

The proximity sensor 141 may be configured to output different proximity signals according to a 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 on which three proximity sensors capable of sensing three proximity depths is disposed 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 touch touch. When the pointer is positioned below the distance d ₁ on the touch screen, the pointer is recognized as a proximity touch of a first proximity depth. When the pointer is spaced apart from the distance d ₁ or more and less than d ₂ on the touch screen, the pointer is recognized as a proximity touch of a second proximity depth. When the pointer is spaced apart from the distance d ₂ or more and less than d ₃ on the touch screen, the pointer is recognized as a proximity touch of a third proximity depth. When the pointer is positioned at a distance of more than d ₃ from the touch screen, the proximity touch is recognized as released.

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

[Description on Figure 5-Transparent Touch]

FIG. 5 is a conceptual diagram illustrating a control method for a touch operation when a pair of display units 156 and 157 overlap.

The terminal disclosed in this drawing is a folder-type terminal in which a folder unit is foldable with respect to a main body. The first display unit 156 mounted on the folder unit may be a light transmissive type or a transparent type such as a TOLED, but the second display unit 157 mounted on the main body may have a form in which light does not penetrate like an LCD. The first and second display units 156 and 157 may be configured as touch screens capable of touch input, respectively.

For example, when a touch (contact touch or proximity touch) with respect to the first display unit or the TOLED 156 is detected, the controller 180 may determine the type of touch and the touch time. Accordingly, at least one image of the image list displayed on the TOLED 156 may be selected or run.

Hereinafter, touch, long touch, long touch & drag (drag) with respect to a method in which information displayed on another display unit or LCD 157 is controlled when a touch is applied to the TOLED 156 exposed to the outside in an overlapped form. The description is based on the input method separated by).

In the overlapped state (mobile terminal is closed), the TOLED 156 is disposed to overlap the lower side of the LCD 157. In this state, when a touch different from a touch for controlling the image displayed on the TOLED 156 is detected, for example, a long touch (for example, a touch lasting more than 2 seconds to 3 seconds), the controller 180 ) 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 in the TOLED 156.

The long touch can also be used to selectively move a desired one of the objects displayed on the LCD 157 (without its execution operation) to the TOLED 156. That is, the user may select one region of the TOLED 156 corresponding to a specific object of the LCD 157. In the long touch, the controller 180 moves the object to the TOLED 156 for display. The object displayed on the TOLED 155 may also be transferred to the LCD 157 according to a predetermined touch input, for example, flicking or swirling, on the TOLED 156. This figure illustrates the case where the number 2 menu displayed on the LCD 156 is moved to the TOLED 156 for display.

If another input, for example, a drag, is additionally detected along with the long touch, the controller 180 is a function related to the image selected by the long touch. Can be displayed on. In this figure, the case where the preview (male photograph) with respect to the 2nd menu (image file) is performed is illustrated.

When the preview screen is output and the drag is made to the TOLED 156 for another image while maintaining the long touch, the controller 180 controls the selection cursor (or selection bar) of the LCD 157. The selected cursor is displayed on the preview screen (woman photo). After that, when the touch (long touch and drag) is finished, the controller 180 displays the first image selected by the long touch.

The touch operation (long touch and drag) is performed when a slide (movement of the proximity touch corresponding to the drag) is detected along with the long proximity touch (the proximity touch lasting at least 2 seconds to 3 seconds) for the TOLED 156. The same applies to.

If a touch operation other than those mentioned above is detected, the controller 180 may operate in the same manner as a general touch control method.

The control method for the touch operation in the overlapped form may 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 on Figure 6-Haptic]

6A and 6B are views referred to for describing a proximity touch recognition region in which a proximity signal is detected and a haptic region in which a haptic effect occurs.

6A shows an object such as an icon or a menu item in a circle for convenience of description. As shown in (a) of FIG. 6A, an area where an object is displayed on the display unit 151 may be divided into a first area A in the center and a second area B surrounding the area. The first area A and the second area B may be configured to generate a tactile effect having different intensities or patterns. For example, the first vibration may be output when the second region B is touched, and the second vibration may be output when the first region A is touched.

If it is necessary to simultaneously set the proximity touch recognition area and the haptic area in the area where the object is displayed, the haptic area where the haptic effect occurs and the proximity touch recognition 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, an area including the first area A and the second area B may be set as a proximity touch recognition area, and the first area A may be set as a haptic area.

As shown in Fig. 6A (b), the area in which the object is displayed is divided into three areas A, B, and C, or as shown in Fig. 6A (c), N (N> 4). It can also be divided into three areas. Each divided area may be configured to generate a tactile effect having 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 may be set differently according to the use environment.

The display unit 151 may be configured such that the size of the proximity touch recognition area varies depending on the depth of proximity. That is, as shown in (a) of FIG. 6B, the corresponding proximity touch recognition area is gradually reduced to 'C', 'B', and 'A' according to the proximity depth to the display unit 151, Alternatively, the corresponding proximity touch recognition region may be gradually increased according to the depth of proximity to the display unit 151. Even in this case, the haptic region may be set to a constant size regardless of the depth of proximity to the display unit 151 as in the 'H' region illustrated in FIG. 6B.

 In the case of dividing the region where the object is displayed for setting the haptic region or the proximity touch recognition region, in addition to the concentric division as shown in FIG. 6A, the division in the horizontal or vertical direction, the radial division, and a combination thereof Various methods, such as division, can be used.

[Description on FIG. 7-Projector Module Form Factor]

A configuration in which the above-described projector module is provided in the bar type mobile terminal 100 as described above will be described with reference to FIGS. 7A and 7B. 7A and 7B are perspective views illustrating an example of a mobile terminal related to the present invention.

To the main body 103 of the mobile terminal, the projector body 105 having the projector module 155 may be coupled to be rotatable.

That is, the projector body 105 may be hinged to the main body 103, and the projection angle is adjusted when the image is projected using the projector module 155 provided in the projector body 105. The camera 121 may be disposed on the projector body 105 to capture an image projected by the projector module 155.

FIG. 7A illustrates a state before the projector body 105 rotatably coupled to the main body 103 is rotated, and FIG. 7B illustrates a state after the projector body 105 is rotated.

On the other hand, the pointer generally refers to a means (for example, a stylus pen or a finger) for touching the touch screen, and a specific shape (for example, displayed on a display moving according to an operation of a mouse or a touch pad). For example, an arrow, or an hourglass, may mean a sign.

In the present specification, in order to distinguish the two from each other, a means for touching the touch screen or an external screen is referred to as a "pointer", and a display of a specific shape moving according to an operation of a mouse, a touch pad, a touch screen, etc. is referred to as a "cursor". I'll call it. The cursor may also include an indication on the display indicating the location where the user can enter text.

For convenience of description, it is assumed that the mobile terminal mentioned below includes at least one of the components shown in FIG. 1. In particular, the mobile terminal to which the present invention is applicable necessarily includes a camera 121 and a projector module 155. In addition, the camera 121 preferably has a zoom function in which the magnification is divided into at least two stages. The zoom function of the camera will be described later in more detail.

Referring to FIG. 8, a command input method using an external screen in a mobile terminal according to an embodiment of the present invention will be described.

8 is a flowchart illustrating a command input method of a mobile terminal according to an embodiment of the present invention.

When the projector function is activated according to the user's selection, the mobile terminal 100 may display a predetermined background image on the external screen using the projector module 155 [S201].

In this case, the controller 180 may control the projector function activation and the overall operation of the projector module 155. The controller 180 sets the projector module 155 in an operable state as the projector function is activated, and the projector module 155 displays a predetermined image on an external screen under the control of the controller 180. Can be set.

Here, the projector function is an image stored in the memory 160 or received from an external terminal by the wireless communication unit 110 or the interface unit 170 by using the projector module 155 provided in the mobile terminal 100. It may mean a function of displaying on the external screen. The external screen includes all means capable of displaying an image projected by the projector module 155, and is not limited to the name or format.

For example, the projector function may be activated when a projector function execution command key provided on a keypad or a touch screen is selected by the user, or when a menu item of 'executing the projector function' is selected through menu search.

The image displayed on the external screen (hereinafter, referred to as a background image) may match the image displayed on the entire or specific area of the screen of the mobile terminal or may not be displayed on the screen of the mobile terminal.

The mobile terminal 100 may capture the background image including the pointer at a first magnification using the camera 121 and recognize the position of the pointer using the same [S202].

Here, when the user points to a point of the background image by using a pointer (for example, a user's finger, etc.), the pointer may be located with respect to the background image.

The controller 180 may receive an image from the outside of the camera 121 when the driving of the projector module 155 is detected or when a camera driving command signal is input from the user through the user input unit 130. Can be set to Since the mobile terminal related to the present invention uses the camera 121 having a zoom function, a predetermined initial magnification (hereinafter referred to as "first magnification") is set according to a use mode before receiving an image from the outside. ) Can be adjusted. It is preferable that the first magnification can capture a whole range or a wider range of the background image.

In addition, the lens of each of the camera 121 and the projector module 155 is preferably provided in the mobile terminal 100 to face the same direction. This is to receive an image including a background image displayed by using the projector module 155 and an image including a pointer positioned thereon through the camera 121.

When the camera 121 is ready to drive by the above-described method, the camera 121 photographs the background image including the pointer, and the controller 180 recognizes the position of the pointer with respect to the background image using the pointer, and the pointer is preset. It may be determined whether the control area is present [S203]. Here, the control area is at least a portion of the background image, and refers to an area where a control using a pointer is performed on an external screen, and may be a reference of a boundary at which the camera 121 changes the magnification. In addition, a control display of a predetermined type indicating a function that can be controlled on an external screen may be further displayed inside the control area at a size equal to or smaller than that of the control area. There may be a plurality of control areas, and the size and position of the control area may not be beyond the background image.

As a result of the determination, when it is determined that the pointer enters the control region, the controller 180 causes the camera 121 to photograph the control region including the pointer at a second magnification and captures the photographed image. The location of the pointer can be grasped using [S204]. Here, it is preferable that the second magnification is higher than the first magnification. That is, the image captured by the camera 121 at the second magnification is enlarged by a predetermined ratio than the image photographed at the first magnification. Therefore, it is possible to more accurately determine the position of the pointer with respect to the control image.

The controller 180 determines whether a touch by the pointer is recognized in the image photographed at the second magnification [S205]. As a result of the determination, when a touch is recognized at a specific point, the controller 180 may perform an operation corresponding to the point [S206].

So far, the command recognition method of the terminal related to an embodiment of the present invention has been described in order. Hereinafter, 1) the zoom function of the camera, 2) a method of recognizing the position of the pointer using the image captured by the camera, 3) a method of recognizing whether the touch, and 4) the control display will be described in more detail.

1) Zoom function of the camera

As described above, the camera 121 of the mobile terminal 100 according to an embodiment of the present invention has a zoom function in which the magnification is divided into at least two steps. The zoom function of the camera can be divided into optical zoom and digital zoom. Optical zoom is a method of optically changing the arrangement of the camera lens to adjust the zoom magnification, and digital zoom is a method of digitally processing the image taken from the same lens array to increase the resolution. Using the optical zoom method does not require additional digital processing, which reduces the computational burden of the control unit, but it can be enlarged or reduced based only on the center of the first captured image unless the camera direction is changed. On the other hand, the digital zoom method requires additional digital processing, but can zoom in on any part captured at the initial magnification. The difference between the two schemes will be described in more detail with reference to FIG. 9.

Referring to FIG. 9A, a mobile terminal 100 including a camera 121 and a projector module 155 is disposed toward an external screen, and a predetermined background image 10 is placed on the external screen of the projector. Projecting using module 155. The control region 31 is set in the background image 10, and the pointer 20 is positioned thereon.

When the user input recognition mode through the external screen is activated through an appropriate menu operation, the camera 121 captures an image as shown in FIG. 9B at a first magnification. Referring to FIG. 9 (b), the image captured at the first magnification may include all of the background image 10 and a portion 19 around the background image 10. Here, when the controller 180 recognizes that the pointer enters the control region 31, the control region 31 may be photographed at a second magnification. In this case, the form 11 for enlarging the control region when using the optical zoom and the form 12 for enlarging the control region when using the digital zoom are different.

First, a case in which the control region 31 is photographed at a second magnification using optical zoom will be described with reference to FIG. 9C. Referring to FIG. 9C, the region 11 illustrated in FIG. 9B may be enlarged and photographed. As described above, since it cannot escape the center of the first photographed image, it can be enlarged as much as possible to cover all of the control region 31 at the right edge.

Next, a case in which the control region 31 is photographed at the second magnification by using the digital zoom will be described with reference to FIG. 9D. Referring to FIG. 9D, another region 12 illustrated in FIG. 9B may be enlarged and photographed. This is because, unlike the case of the optical zoom, it is possible to magnify any part of the image originally photographed.

Those skilled in the art can appropriately implement the above-described methods by selecting or combining according to the situation.

2) How to recognize the location of the pointer by using the image taken by the camera

The method that can be used to recognize the position of the pointer in the image photographed at the first magnification or the second magnification through the camera 121 will be broadly divided into two. The first is about object recognition technology that separates the pointer from the background image and determines its position, and the second is about how to use the object recognition technology more accurately and effectively.

First, the object recognition technology will be described.

The controller 180 may recognize a pointer from the captured image by using an object recognition technology. Object recognition techniques include detection techniques, tracking techniques, identification techniques, and the like.

For example, the detection technique refers to a technique of detecting an image portion corresponding to a pointer from a captured image.

In addition, the tracking technique refers to a technique for detecting while continuously tracking the pointer on the captured image according to the movement of the pointer while the image portion corresponding to the pointer is detected from the captured image. Therefore, even when the pointer moves, the controller 180 can determine the position of the pointer using the captured image.

In addition, the identification technique refers to a technique of matching an image portion corresponding to the detected pointer among the captured images with a previously stored image portion. Accordingly, the controller 180 may determine the position of the pointer by comparing the pre-stored image portion with respect to the pointer and the currently detected image portion.

Next, a method of more accurately and efficiently using the above-described object recognition technology will be described with reference to FIG. 10. 10 illustrates an example of a background image that may be projected through the projector module 155.

Referring to FIG. 10, a predetermined reference figure 15 may be displayed at four corners of the background image. When the pointer enters the control area, the reference figure 35, which may serve as the reference figure 15, may be further displayed in the image captured at the second magnification. Such a reference figure may serve as a reference point for the controller 180 to recognize a background image or a range of a control region, and also a position relative to the reference figures, for example, the reference figure in determining a position of a pointer. Calculations using coordinates by properly dividing the intervals of the two may be considered. Therefore, more efficient and accurate position detection of the pointer may be possible. This may also be used to recognize the position of the pointer in the image taken at the second magnification. In other words, remember the edge coordinates of the area occupied by the image taken at the second magnification within the image taken at the first magnification, and make them the reference point when detecting the position of the pointer in the image taken at the second magnification. It can be.

In addition to the background image including the aforementioned reference figure, the use of a specific pointer may also be considered. In general, a finger, a stylus pen, or the like may be used, but for a more accurate recognition, a specific pointer, for example, a pointer having a specific surface pattern at the end or having a light emitting element may be used.

The predetermined reference figures, types of pointers, and predetermined analysis information for detecting, tracking, and identifying them may be stored in the memory unit 160.

3) How to recognize touch

The mobile terminal according to the present invention recognizes whether the pointer touches on the external screen can be divided into three broad descriptions.

As a first method, a method of recognizing a touch on a point when the pointer stays at a certain point or more on a background image will be described with reference to FIG. 11. FIG. 11 illustrates a process in which an icon is selected and dragged from a control area photographed at a second magnification in a background image projected from a projector module of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 11A, the pointer 20 approaches an icon 41 located inside the control area. When the pointer 20 stays on the icon 41 for a predetermined time, the controller 180 can recognize that the icon 41 is touched as shown in FIG. In this case, a predetermined visual effect 410 may be provided around the icon to inform the touch state. If the pointer 20 is moved upward as shown in FIG. 11C, the icon 41 may also move along the pointer. Next, if the predetermined time stays at the point moved upward, the touch state may be released as shown in FIG. If a visual effect for notifying the touch is provided, the visual effect may also disappear as the touch is released. After the touch state is released, the icon 41 no longer moves even when the pointer 20 moves out of the icon 41 as shown in FIG.

However, if the touch on the icon is recognized in the above manner, it does not matter if the icon can only execute a predetermined function when the touch is received or if the icon can only be moved by a drag operation. However, if the icon has both of the above functions, it is necessary to distinguish whether the icon is selected by touch and executed, or whether the icon is moved by dragging.

In this case, a method of making a difference in touch time may be considered. That is, the time for which the pointer stays on the icon to select a certain icon is divided into two sections so that no action is performed until t ₁ . In addition, when the pointer moves to another point after staying for more than t ₁ and less than t _2, the drag operation may be performed. t _{for 2} hours or more meomureumyeon the pointer on the icon, it is possible to ensure that a predetermined function is performed, assigned thereto. In this case, a predetermined visual effect may be applied to the icon in order to visually distinguish sections based on t ₁ and t ₂ . For example, a predetermined time gauge indicating the passage of time may be displayed on the icon to inform the user that the gauge has passed to t ₂ hours when it is full. In addition, the color may be used in the visual effect area 410 of the icon to change from one color to a middle color as the next color changes with time. That is, if yellow is t ₁ and blue is t ₂ , yellow may appear in the visual effect area 410 after t ₁ from the beginning, indicating that drag is possible. After this to over time up to t ₂ after the change from yellow green to blue can be such that the amount of time t ₂ notify the passed since the predetermined function assigned to the icon runs. Of course, as time goes by, the execution of the predetermined function may be performed before the drag operation.

Secondly, a touch recognition method using shadows will be described with reference to FIG. 12.

Referring to FIG. 12, the mobile terminal 100 may determine the distance d between the pointer 20 and the shadow 25 from the input image input through the camera 121 under the control of the controller 180. have. That is, the controller 180 recognizes the shape of the pointer and the shadow from the input image, respectively, and can determine the distance between the pointer and the shadow according to the difference in size according to the distance from each other. Accordingly, if it is determined that the mobile terminal 100 is within a predetermined distance according to the detected distance between the pointer 20 and the shadow 25, the mobile terminal 100 may recognize a touch on a point indicated by the pointer in the external image. Can be.

Third, a touch recognition method using a distance sensor will be described with reference to FIG. 13. Referring to FIG. 13A, the mobile terminal 100 may be provided with a distance sensor 142 facing the same direction as the projector module 155 and the camera 121. The distance sensor 142 may determine a distance d _s from the distance sensor to a screen on which the background image 10 is projected and a distance d _p from the pointer 20 according to a control signal of the controller 180. Each can be measured. The controller 180 may recognize a touch when a difference between the measured distances d _s and d _p is within a certain distance. However, the distance d _s from the distance sensor 142 to the screen is an edge d at the center d _s1 of the screen on which the background image 10 is projected, as shown in FIG. 13 (b). _s2 ) is further away. Therefore, in order to more accurately measure the distance difference between the screen and the pointer, the above-described distance difference between the center of the screen and the outside is preferably considered. At this time, since it is difficult to measure all distances to each point of the screen, when d _s1 is determined, a method of referring to a predetermined look-up table for the distance to the rest of the screen may be used. Can be. The predetermined correction table includes a value of d _s2 for each point on the screen according to various d _s1 , and may be stored in the memory unit 160.

On the other hand, since the distance sensor 142 measures the distance to a point instead of the entire surface, in order to measure d _p , a point at which the distance sensor measures the distance when the pointer 20 moves (hereinafter, referred to as 'pointing point'). Also move accordingly. Therefore, the range of movement of the reference point of the distance sensor 142 is preferably the entire area of the screen on which the background image is projected, and at least the entire area of the control area is required. The controller 180 tracks the position of the pointer 20 by using the image photographed at the second magnification through the camera 121 so that the point of reference of the distance sensor matches the position of the pointer 20. In order to move the measuring point, a method of mechanically changing the direction of the distance sensor 142 or a method of using a plurality of distance sensors for each direction may be considered. In this way, the controller 180 can recognize the touch by continuously measuring the distance difference between the pointer 20 and the screen while tracking the movement of the pointer 20.

4) control display

The control display, as described above, is displayed in the control area and may be an object or a set of objects that are touched by a pointer as a predetermined type of display representing a function that can be controlled on an external screen. This will be described in more detail with reference to FIG. 14. 14 is a state diagram of a background image displaying various types of control displays.

When the control display takes the form of an icon, as shown in FIG. 14A, a plurality of icons may be arranged in a predetermined form and always displayed in the control area 31. The control display does not normally appear as shown in FIG. 14B, but when the pointer 20 enters the control area 31, the icons 41 are displayed in the form 40 of an On Screen Display (OSD). You can also make it appear. When the pointer is moved out of the control area 31, the icons 41 may disappear again.

If a control display in the form of a control bar is used, a bar 53 capable of adjusting the volume as shown in FIG. 14C may be displayed in the control area 31 together with the bar area 52. . In addition, a control bar 56 may be displayed in the other control area 32 to control the playback time as needed. If the user wants to control the desired volume by operating the volume control bar 53, the pointer 20 may be positioned at a desired volume position and a touch input may be applied using the above-described methods. In doing so, the volume control bar 53 is moved to the position of the desired volume, and the volume can be changed accordingly. In addition to the method of touching the desired position of the bar area, a method of selecting and dragging the control bar to the desired position may also be used.

Next, the case of using the pattern recognition area will be described with reference to FIG. The pattern recognition area refers to an area in which a function corresponding to the input pattern is performed when a predetermined pattern is input while the pointer maintains a touch therein.

Referring to FIG. 15A, when the pointer 20 enters the pattern recognition area 60 set in the same range as the control area, the camera 121 may pattern the pattern at a second magnification according to the control signal of the controller 180. The recognition area 60 may be photographed. In this case, if the alphabet 61 “T” is input while the touch is maintained in the above-described method, the controller 180 recognizes the input pattern in the image captured by the second magnification and presets the corresponding pattern. The action can be executed.

An example of the setting of the above operation will be described with reference to FIG. 15B. The user may enter the pattern recognition setting menu as shown in FIG. 15B through a predetermined menu operation. Herein, any one of preset patterns is selected through a predetermined pattern input window 70, or a new pattern is memorized and a function to be executed through the pattern is selected from the selectable menus 71 and assigned 72. You can. Information about the functions mapped to the pattern may be stored in the memory unit 160.

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

A mobile terminal having a camera and a projector module as described above is not limited to the configuration and method of the embodiments described above, but the embodiments are all or part of each embodiment so that various modifications can be made. May be optionally combined.

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

Figure 2a is a front perspective view of a mobile terminal according to an embodiment of the present invention.

2b is a rear perspective view of a mobile terminal according to one embodiment of the present invention;

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

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

5 is a conceptual diagram illustrating a control method for a touch operation in a form in which a pair of display units overlap.

6A and 6B are conceptual views for explaining a proximity touch recognition region where a proximity signal is detected and a haptic region that generates a tactile effect, respectively.

7A and 7B are perspective views of a mobile terminal according to an embodiment of the present invention.

8 is a flowchart illustrating a command input method of a mobile terminal according to an embodiment of the present invention.

9 is a conceptual diagram for explaining a difference between digital zoom and optical zoom.

10 is a display state diagram illustrating an example of a background image projected from a projector module of a mobile terminal according to an embodiment of the present invention.

FIG. 11 is a conceptual diagram illustrating a process in which an icon is selected and dragged from a control region photographed at a second magnification in a background image projected from a mobile terminal according to an embodiment of the present invention. FIG.

12 is a conceptual diagram illustrating a touch recognition method using shadows in a mobile terminal according to an embodiment of the present invention.

13 is a conceptual diagram illustrating a touch recognition method using a distance sensor in a mobile terminal according to an embodiment of the present invention.

14 is a state diagram of a background image showing various types of control displays that can be projected in a mobile terminal according to an embodiment of the present invention.

15 is a conceptual diagram illustrating a case in which a pattern recognition area is used in a mobile terminal according to an embodiment of the present invention.

Claims (22)

A projector module for projecting a predetermined image having at least one control area on an external screen; A camera having a zoom function for photographing the external screen; And A control unit for recognizing the position of the pointer through the camera when the pointer is positioned on the image, and controlling the zoom magnification of the camera to be different depending on whether the position of the pointer is on the control area; terminal. The method of claim 1, wherein the control unit, The camera photographs the external screen at a first magnification when the pointer is not in the control area, and the external screen at a second magnification higher than the first magnification when the pointer is located in the control area. A mobile terminal, characterized in that for controlling to run. The method of claim 2, wherein the control unit, And the camera controls to photograph the entire external screen at a first magnification and to photograph a portion of the external screen including a control area in which the pointer is located at a second magnification. The method of claim 3, wherein the control unit, By using the image captured by the camera at a second magnification including the control region, the camera may further recognize a touch or a touch pattern on a point indicated by the pointer, and the operation corresponding to the recognized touch point or the touch pattern may be performed. Mobile terminal characterized in that the control to be performed. The method of claim 4, wherein the control unit, And a predetermined visual effect is displayed at the recognized touch point in the control area. The method of claim 4, wherein the control unit, And the pointer is controlled to be recognized as a touch on the point when the pointer stays in the control area for more than a predetermined time. The method of claim 6, wherein the control unit, And dividing the predetermined time staying at the point indicated by the pointer into two or more steps, and controlling to display different touch effects according to each step. The method of claim 6, wherein the control unit, When the drag function is performed as a result of being recognized as a touch by staying at the point indicated by the pointer for more than a predetermined time, the point recognized as the first touch is recognized as the drag start point, and the pointer is moved from the drag start point to another point. And after the predetermined time is over, controlling to recognize that the drag operation is terminated at the point. The method of claim 4, wherein the camera, Photographing the shadow caused by the pointer in the control area; The control unit, The camera detects the distance between the pointer and the shadow from the image captured by the second magnification including the control area, and touches a point indicated by the pointer in the control area according to the determined distance. Mobile terminal, characterized in that for controlling to recognize. The method of claim 9, wherein the control unit, And when it is determined that the distance between the pointer and the shadow is within a certain distance, controlling to recognize the touch as a touch on a point indicated by the pointer. The method of claim 4, wherein The apparatus further includes a distance sensor for measuring a distance between the pointer and the external screen. And controlling whether the touch is detected by using the distance of the pointer with respect to the external screen measured by the distance sensor. The method of claim 11, wherein the control unit, And when it is determined that the distance between the pointer and the external screen measured using the distance sensor is within a certain distance, controlling to recognize the touch as a touch on a point indicated by the pointer. The method of claim 12, wherein the control unit, In measuring the distance between the pointer and the external screen using the distance sensor, the distance between the distance sensor and the external screen is further considered as the distance from the center of the outer screen to the edge is further considered. Mobile terminal. The method of claim 1, Further comprising a memory for storing a predetermined reference figure and analysis information thereof, The control unit, The projector module further projects the predetermined reference figure on a predetermined area of the background image, and recognizes the position of the pointer using the image photographed by the camera, and thus the relative position of the reference figure and the pointer. Mobile terminal, characterized in that for controlling to use. The method of claim 4, wherein the control unit, And when the pointer enters the control area, controls to display a predetermined control display on the control area in at least a portion of the control area. The display of claim 15, wherein the control display is At least one selected from the group comprising an icon, a control bar (BAR) and a pattern recognition area. The method of claim 15, wherein the control unit, And the control display is displayed on at least a portion of the control area in the form of an on-screen display. The method of claim 16, wherein the control bar, A mobile terminal characterized by adjusting any one of a group including volume control, screen brightness control, scrolling of the screen, and movement of the playback point. The method of claim 16, wherein the control unit, When the control display is a pattern recognition area, the camera recognizes a touch pattern of the pointer in the pattern recognition area by using an image photographed at a second magnification, and controls to perform a function corresponding thereto. Mobile terminal. The method of claim 19, Further including a memory unit, The function corresponding to the touch pattern, The mobile terminal is set in the memory unit. The method of claim 1, And at least one pointer selected from the group consisting of a hand, a stylus pen, a print having a predetermined pattern, and a light emitting device. Projecting a predetermined background image through the projector module; Photographing the background image including a pointer at a first magnification of the camera; Recognizing a position of the pointer in the background image by using the image photographed at the first magnification; Determining whether the location-recognized pointer is in a specific control area; Photographing the control area at a second magnification of the camera if the pointer is in the control area as a result of the determination; Determining the position and touch of the pointer by using the image photographed at the second magnification; And And recognizing a touch on a specific point in the control area as a result of the determination; performing an operation corresponding to the touched point.

Images