KR20180128826A - Mobile terminal and method for controlling the same - Google Patents

Abstract

The present invention relates to a mobile terminal including a lamp device and a control method thereof. According to an embodiment of the present invention, the mobile terminal comprises: a lamp device; a camera; and a control unit configured to photograph a 3D image by using the lamp device and the camera. The lamp device comprises: a pattern light source configured to irradiate light of a preset pattern; and a surface light source configured to irradiate uniform light. The control unit controls the lamp device to alternately irradiate light of the pattern light source and light of the surface light source.

Description

[0001] MOBILE TERMINAL AND METHOD FOR CONTROLLING THE SAME [0002]

The present invention relates to a mobile terminal including a lighting device, and more particularly to a mobile terminal provided with a lighting device used for shooting a three-dimensional image.

A terminal can be divided into a mobile terminal (mobile / portable terminal) and a stationary terminal according to whether the terminal can be moved. The mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal according to whether the user can directly carry the mobile terminal.

The functions of mobile terminals are diversified. For example, there are data and voice communication, photographing and video shooting through a camera, voice recording, music file playback through a speaker system, and outputting an image or video on a display unit. Some terminals are equipped with an electronic game play function or a multimedia player function. In particular, modern mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.

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 recent years, as the performance of a camera has improved, various functions using a camera have been developed. For example, there have been actively developed functions for capturing a high-quality still image or moving image, or generating a 3D image using depth information (depth value) of an image received through a camera.

The role of the light emitting device is important for various functions using such a camera. Here, the light emitting element emits light into a space corresponding to an image received through the camera.

Accordingly, there is a need to develop a light emitting device and a control method of a light emitting device for performing various functions using a camera.

An object of the present invention is to provide a mobile terminal including an illumination device capable of illuminating light used for extracting depth information of an image photographed through a camera in an optimized manner, and a control method thereof.

It is another object of the present invention to provide a mobile terminal including a lighting device configured to irradiate a subject with an optical spot having a number of spots greater than the number of light sources, and a control method thereof.

Still another object of the present invention is to provide a mobile terminal and a control method thereof capable of photographing an optimized three-dimensional image using a planar light source and a pattern light source.

It is still another object of the present invention to provide a mobile terminal including an illumination device capable of radiating heat generated in a plurality of light emitting devices in an optimized manner.

A lighting device included in a mobile terminal according to an embodiment of the present invention includes a lighting device, a camera, and a control unit for photographing a three-dimensional image using the lighting device and the camera, And a surface light source for emitting uniform light, wherein the control unit controls the illumination device such that the pattern light source and the surface light source alternately irradiate light.

In an exemplary embodiment, the control unit may cause the planar light source to emit light while the pattern light source emits light, and cause the pattern light source to emit no light while the planar light source emits light.

In an embodiment, the control unit may be configured to emit the pattern light source when the camera photographs the first frame, and to emit the pattern light when the camera photographs the second frame after photographing the first frame, Thereby controlling the apparatus.

In an embodiment, the control unit may cause the pattern light source to emit light when the camera captures the third frame after capturing the second frame, and to capture the fourth frame after the camera captures the third frame The surface light source is caused to emit light.

In one embodiment of the present invention, the control unit may cause the pattern light source to emit light for at least part of the time of photographing the first frame, and to emit the face light source for at least part of the time of photographing the second frame .

In one embodiment, the controller extracts depth information through a first frame captured during the emission of the pattern light source, and uses brightness information and an edge of the object using the second frame photographed while the face light source emits light. (Edge) information is extracted.

In one embodiment of the present invention, the controller generates one three-dimensional image using the first frame and the second frame captured through the camera.

In an embodiment, the pattern light source includes a plurality of light emitting elements, the plurality of light emitting elements are grouped into a plurality of groups, and the control unit controls the plurality of groups in units of groups.

In an exemplary embodiment, the control unit sequentially emits light in a predetermined order for each of the plurality of groups.

In the embodiment, the control unit causes the plurality of groups to emit light so that the times of light emission of the plurality of groups do not overlap each other.

In the embodiment, it is defined that the plurality of groups sequentially emit light sequentially, and the control unit causes the plurality of groups to emit light by a plurality of sets while the camera captures the first frame .

In one embodiment, the time during which the one set is performed is constant, and the number of times of the plurality of sets performed during the shooting of the first frame varies depending on the time taken to photograph the first frame .

According to the present invention, the present invention can provide a mobile terminal capable of improving the quality of depth information by using one camera and dual illumination (for example, a surface light source and a pattern light source).

In addition, the present invention can provide a new mobile terminal capable of extracting depth information and edge information by using only one camera without using a plurality of cameras by emitting light by crossing a plane light source and a pattern light source.

In addition, the present invention can provide a new control method that can perform face recognition, line recognition, and fusion mapping using a black-and-white image obtained when the surface light source is irradiated and a depth image obtained when the pattern light source is irradiated .

1A is a block diagram illustrating a mobile terminal according to the present invention.
FIGS. 1B and 1C are conceptual diagrams illustrating an example of a mobile terminal according to the present invention in different directions.
2 is a conceptual diagram for explaining a camera and a lighting device provided in a mobile terminal according to the present invention.
3 is a conceptual diagram for explaining a conventional lighting technique.
4 is a conceptual diagram for explaining a lighting device provided in a mobile terminal according to an embodiment of the present invention.
5, 6, 7, and 8 are conceptual diagrams for explaining an illumination technique using the illumination device of the present invention.
9 is a conceptual diagram for explaining a mobile terminal of the present invention.
10 and 11 are conceptual diagrams for explaining a method of controlling a lighting apparatus.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or similar components are denoted by the same reference numerals, and redundant explanations thereof will be omitted. 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. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC A tablet PC, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.

However, it will be appreciated by those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, a digital signage, and the like, will be.

1A to 1C are block diagrams for explaining a mobile terminal according to the present invention, and FIGS. 1B and 1C are conceptual diagrams showing an example of a mobile terminal according to the present invention in different directions.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, ), And the like. The components shown in FIG. 1A are not essential for implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than the components listed above.

The wireless communication unit 110 may be connected between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and another mobile terminal 100 or between the mobile terminal 100 and the external server 100. [ Lt; RTI ID = 0.0 > wireless < / RTI > In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, and a location information module 115 .

The input unit 120 includes a camera 121 or an image input unit for inputting a video signal, a microphone 122 for inputting an audio signal, an audio input unit, a user input unit 123 for receiving information from a user A touch key, a mechanical key, and the like). The voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.

The sensing unit 140 may include at least one sensor for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, A G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, a finger scan sensor, an ultrasonic sensor, A microphone 226, a battery gauge, an environmental sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, A thermal sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification can combine and utilize information sensed by at least two of the sensors.

The output unit 150 includes at least one of a display unit 151, an acoustic output unit 152, a haptic tip module 153, and a light output unit 154 to generate an output related to visual, auditory, can do. The display unit 151 may have a mutual layer structure with the touch sensor or may be integrally formed to realize a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and a user and may provide an output interface between the mobile terminal 100 and a user.

The interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100. The interface unit 160 is connected to a device having a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, And may include at least one of a port, an audio I / O port, a video I / O port, and an earphone port. In the mobile terminal 100, corresponding to the connection of the external device to the interface unit 160, it is possible to perform appropriate control related to the connected external device.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a plurality of application programs or applications running on the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these applications may be downloaded from an external server via wireless communication. Also, at least a part of these application programs may exist on the mobile terminal 100 from the time of shipment for the basic functions (e.g., telephone call receiving function, message receiving function, and calling function) of the mobile terminal 100. Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and may be operated by the control unit 180 to perform the operation (or function) of the mobile terminal.

In addition to the operations related to the application program, the control unit 180 typically controls the overall operation of the mobile terminal 100. The control unit 180 may process or process signals, data, information, and the like input or output through the above-mentioned components, or may drive an application program stored in the memory 170 to provide or process appropriate information or functions to the user.

In addition, the controller 180 may control at least some of the components illustrated in FIG. 1A in order to drive an application program stored in the memory 170. FIG. In addition, the controller 180 may operate at least two of the components included in the mobile terminal 100 in combination with each other for driving the application program.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to the components included in the mobile terminal 100. The power supply unit 190 includes a battery, which may be an internal battery or a replaceable battery.

At least some of the components may operate in cooperation with one another to implement a method of operation, control, or control of a mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170. [

Hereinafter, the various components of the mobile terminal 100 will be described in detail with reference to FIG. 1A.

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 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. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

The mobile communication module 112 may be a mobile communication module or a mobile communication module such as a mobile communication module or a mobile communication module that uses technology standards or a communication method (e.g., Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution And an external terminal, or a server on a mobile communication network established according to a long term evolution (AR), a long term evolution (AR), or the like.

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. The wireless Internet module 113 is configured to transmit and receive a wireless signal in a communication network according to wireless Internet technologies.

Wireless Internet technologies include, for example, wireless LAN (WLAN), wireless fidelity (Wi-Fi), wireless fidelity (Wi-Fi) Direct, DLNA (Digital Living Network Alliance), WiBro Interoperability for Microwave Access, High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) 113 transmit and receive data according to at least one wireless Internet technology, including Internet technologies not listed above.

The wireless Internet module 113 for performing a wireless Internet connection through the mobile communication network can be used for wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE or LTE- May be understood as a kind of the mobile communication module 112.

The short-range communication module 114 is for short-range communication, and includes Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB) (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The short-range communication module 114 is connected to the mobile terminal 100 and the wireless communication system through the wireless area networks, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 ) And the other mobile terminal 100 (or the external server). The short-range wireless communication network may be a short-range wireless personal area network.

Here, the other mobile terminal 100 may be a wearable device (e.g., a smartwatch, a smart glass, etc.) capable of interchanging data with the mobile terminal 100 according to the present invention (smart glass), HMD (head mounted display)). The short range communication module 114 may detect (or recognize) a wearable device capable of communicating with the mobile terminal 100 around the mobile terminal 100. [ If the detected wearable device is a device authenticated to communicate with the mobile terminal 100 according to the present invention, the control unit 180 may transmit at least a part of the data processed by the mobile terminal 100 to the short- 114 to the wearable device. Therefore, the user of the wearable device can use the data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a telephone is received in the mobile terminal 100, the user performs a telephone conversation via the wearable device, or when a message is received in the mobile terminal 100, It is possible to check the message.

The position information module 115 is a module for obtaining the position (or current position) of the mobile terminal, and a representative example thereof is a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, when the mobile terminal utilizes the GPS module, it can acquire the position of the mobile terminal by using a signal transmitted from the GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, it can acquire the position of the mobile terminal based on information of a wireless access point (AP) that transmits or receives the wireless signal with the Wi-Fi module. Optionally, the location information module 115 may perform any of the other functions of the wireless communication unit 110 to obtain data relating to the location of the mobile terminal, in addition or alternatively. The location information module 115 is a module used to obtain the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or obtains the location of the mobile terminal.

Next, the input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. For inputting image information, Or a plurality of cameras 121 may be provided. 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 may be displayed on the display unit 151 or stored in the memory 170. [ A plurality of cameras 121 provided in the mobile terminal 100 may be arranged to have a matrix structure and various angles or foci may be provided to the mobile terminal 100 through the camera 121 having the matrix structure A plurality of pieces of image information can be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire a left image and a right image for realizing a stereoscopic image.

The microphone 122 processes the external acoustic signal into electrical voice data. The processed voice data can be utilized variously according to a function (or a running application program) being executed in the mobile terminal 100. Meanwhile, the microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in receiving an external sound signal.

The user input unit 123 is for receiving information from a user and when the information is inputted through the user input unit 123, the control unit 180 can control the operation of the mobile terminal 100 to correspond to the input information . The user input unit 123 may include a mechanical input unit or a mechanical key such as a button located on a front or rear or side of the mobile terminal 100, a dome switch, a jog wheel, Jog switches, etc.) and touch-type input means. For example, the touch-type input means may comprise a virtual key, a soft key or a visual key displayed on the touch screen through software processing, And a touch key disposed on the touch panel. Meanwhile, the virtual key or the visual key can be displayed on a touch screen having various forms, for example, a graphic, a text, an icon, a video, As shown in FIG.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information, and generates a corresponding sensing signal. The control unit 180 may control the driving or operation of the mobile terminal 100 or may perform data processing, function or operation related to the application program installed in the mobile terminal 100 based on the sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface, or the presence of an object in the vicinity of the detection surface, without mechanical contact by using electromagnetic force or infrared rays. The proximity sensor 141 may be disposed in the inner area of the mobile terminal or in proximity to the touch screen, which is covered by the touch screen.

Examples of the proximity sensor 141 include a transmission type photoelectric sensor, a direct reflection fluorescent light sensor, a mirror reflection fluorescent light sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. In the case where the touch screen is electrostatic, the proximity sensor 141 can be configured to detect the proximity of the object with a change of the electric field along the proximity of the object having conductivity. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

On the other hand, for convenience of explanation, the act of recognizing that the object is located on the touch screen in proximity with no object touching the touch screen is referred to as " proximity touch & The act of actually touching an object on the screen is called a " contact touch. &Quot; The position at which the object is closely touched on the touch screen means a position where the object corresponds to the touch screen vertically when the object is touched. The proximity sensor 141 can detect 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, have. Meanwhile, the control unit 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern sensed through the proximity sensor 141 as described above, and further provides visual information corresponding to the processed data It can be output on the touch screen. Furthermore, the control unit 180 can control the mobile terminal 100 such that different operations or data (or information) are processed according to whether the touch to the same point on the touch screen is a proximity touch or a touch touch .

The touch sensor senses a touch (or touch input) applied to the touch screen (or the display unit 151) by using at least one of various touch methods such as a resistance film type, a capacitive type, an infrared type, an ultrasonic type, do.

For example, the touch sensor may be configured to convert a change in a pressure applied to a specific portion of the touch screen or a capacitance generated in a specific portion to an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the time of touch, a capacitance at the time of touch, and the like where a touch object touching the touch screen is touched on the touch sensor. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

Thus, when 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. Here, the touch controller may be a separate component from the control unit 180, and may be the control unit 180 itself.

On the other hand, the control unit 180 may perform different controls or perform the same control according to the type of the touch object touching the touch screen (or a touch key provided on the touch screen). Whether to perform different controls or to perform the same control according to the type of the touch object may be determined according to the current state of the mobile terminal 100 or an application program being executed.

On the other hand, the touch sensors and the proximity sensors discussed above can be used independently or in combination to provide a short touch (touch), a long touch, a multi touch, a drag touch ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, and the like. Touch can be sensed.

The ultrasonic sensor can recognize the position information of the object to be sensed by using ultrasonic waves. Meanwhile, the controller 180 can calculate the position of the wave generating source through the information sensed by the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated using the fact that the light is much faster than the ultrasonic wave, that is, the time when the light reaches the optical sensor is much faster than the time the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generating source can be calculated using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera 121 includes at least one of a camera sensor (for example, a CCD, a CMOS, etc.), a photo sensor (or an image sensor), and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to sense a touch of the sensing object with respect to the three-dimensional stereoscopic image. The photosensor can be laminated to the display element, which is adapted to scan the movement of the object to be detected proximate to the touch screen. More specifically, the photosensor mounts photo diodes and TRs (Transistors) in a row / column and scans the contents loaded on the photosensor using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor performs coordinate calculation of the object to be sensed according to the amount of change of light, and position information of the object to be sensed can be obtained through the calculation.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

In addition, the display unit 151 may be configured as a stereoscopic display unit for displaying a stereoscopic image.

In the stereoscopic display unit, a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), and a projection system (holographic system) can be applied.

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output unit 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 unit 152 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 153 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 153 may be vibration. The intensity and pattern of the vibration generated in the haptic module 153 can be controlled by the user's selection or the setting of the control unit. For example, the haptic module 153 may synthesize and output different vibrations or sequentially output the vibrations.

In addition to vibration, the haptic module 153 may be configured to perform various functions such as 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, 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 153 can transmit the tactile effect through the direct contact, and the tactile effect can be felt by the user through the muscles of the finger or arm. The haptic module 153 may include two or more haptic modules 153 according to the configuration of the mobile terminal 100.

The light output unit 154 outputs a signal for notifying the occurrence of an event using the light of the light source of the mobile terminal 100. Examples of events that occur in the mobile terminal 100 may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.

The signal output from the light output unit 154 is implemented as the mobile terminal emits light of a single color or a plurality of colors to the front or rear surface. The signal output may be terminated by the mobile terminal detecting the event confirmation of the user.

The interface unit 160 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data in the mobile terminal 100 to an external device. For example, a port for connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, an audio I / O port, a video I / O port, an earphone port, and the like may be included in the interface unit 160.

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 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 interface unit 160. [

The interface unit 160 may be a path through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, And various command signals may be transmitted to the mobile terminal 100. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The memory 170 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 170 may store data related to vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 170 may be a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card micro type ), Card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read memory, a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs the storage function of the memory 170 on the Internet.

Meanwhile, as described above, the control unit 180 controls the operations related to the application program and the general operation of the mobile terminal 100. [ For example, when the state of the mobile terminal meets a set condition, the control unit 180 can execute or release a lock state for restricting input of a user's control command to applications.

In addition, the control unit 180 performs control and processing related to voice communication, data communication, video call, or the like, or performs pattern recognition processing to recognize handwriting input or drawing input performed on the touch screen as characters and images, respectively . Further, the controller 180 may control any one or a plurality of the above-described components in order to implement various embodiments described below on the mobile terminal 100 according to the present invention.

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 power supply unit 190 includes a battery, the battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like.

In addition, the power supply unit 190 may include a connection port, and the connection port may be configured as an example of an interface 160 through which an external charger for supplying power for charging the battery is electrically connected.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 may use at least one of an inductive coupling method based on a magnetic induction phenomenon from an external wireless power transmission apparatus and a magnetic resonance coupling method based on an electromagnetic resonance phenomenon Power can be delivered.

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

Referring to FIGS. 1B and 1C, the disclosed mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto and can be applied to various structures such as a folder type, a flip type, a slide type, a swing type, and a swivel type in which a watch type, a clip type, a glass type or two or more bodies are relatively movably coupled . A description of a particular type of mobile terminal, although relevant to a particular type of mobile terminal, is generally applicable to other types of mobile terminals.

Here, the terminal body can be understood as a concept of referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (for example, a frame, a housing, a cover, and the like) that forms an appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

A display unit 151 is disposed on a front surface of the terminal body to output information. The window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101. [

In some cases, electronic components may also be mounted on the rear case 102. Electronic parts that can be mounted on the rear case 102 include detachable batteries, an identification module, a memory card, and the like. In this case, a rear cover 103 for covering the mounted electronic components can be detachably coupled to the rear case 102. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic parts mounted on the rear case 102 are exposed to the outside.

As shown, when the rear cover 103 is coupled to the rear case 102, a side portion of the rear case 102 can be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the engagement. Meanwhile, the rear cover 103 may be provided with an opening for exposing the camera 121b and the sound output unit 152b to the outside.

These cases 101, 102, and 103 may be formed by injection molding of synthetic resin or may be formed of metal such as stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case provides the internal space, unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components. In this case, a unibody mobile terminal 100 in which synthetic resin or metal is connected from the side to the rear side can be realized.

Meanwhile, the mobile terminal 100 may include a waterproof unit (not shown) for preventing water from penetrating into the terminal body. For example, the waterproof portion is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102, or between the rear case 102 and the rear cover 103, And a waterproof member for sealing the inside space of the oven.

The mobile terminal 100 is provided with a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, an interface unit 160, and the like.

1B and 1C, a display unit 151, a first sound output unit 152a, a proximity sensor 141, an illuminance sensor 142, an optical output unit (not shown) A second operation unit 123b, a microphone 122 and an interface unit 160 are disposed on a side surface of the terminal body, And a mobile terminal 100 having a second sound output unit 152b and a second camera 121b disposed on a rear surface thereof.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed, or placed on different planes. For example, the first operation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side surface of the terminal body rather than the rear surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

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, a 3D display, and an e-ink display.

In addition, the display unit 151 may exist in two or more depending on the embodiment of the mobile terminal 100. In this case, the mobile terminal 100 may be provided with a plurality of display portions spaced apart from each other or disposed integrally with one another, or may be disposed on different surfaces, respectively.

The display unit 151 may include a touch sensor that senses a touch with respect to the display unit 151 so that a control command can be received by a touch method. When a touch is made to the display unit 151, the touch sensor senses the touch, and the control unit 180 generates a control command corresponding to the touch based on the touch. The content input by the touch method may be a character or a number, an instruction in various modes, or a menu item that can be designated.

The touch sensor may be a film having a touch pattern and disposed between the window 151a and a display (not shown) on the rear surface of the window 151a, or may be a metal wire . Alternatively, the touch sensor may be formed integrally with the display. For example, the touch sensor may be disposed on a substrate of the display or inside the display.

In this way, the display unit 151 can form a touch screen together with the touch sensor. In this case, the touch screen can function as a user input unit 123 (see FIG. 1A). In some cases, the touch screen may replace at least some functions of the first operation unit 123a.

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to a user's ear and the second sound output unit 152b may be implemented as a loud speaker for outputting various alarm sounds or multimedia playback sounds. ). ≪ / RTI >

The window 151a of the display unit 151 may be provided with an acoustic hole for emitting the sound generated from the first acoustic output unit 152a. However, the present invention is not limited to this, and the sound may be configured to be emitted along an assembly gap (for example, a gap between the window 151a and the front case 101) between the structures. In this case, the appearance of the mobile terminal 100 can be made more simple because the hole formed independently for the apparent acoustic output is hidden or hidden.

The optical output unit 154 is configured to output light for notifying the occurrence of an event. Examples of the event include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and reception of information through an application. The control unit 180 may control the light output unit 154 to terminate the light output when the event confirmation of the user is detected.

The first camera 121a processes an image frame of a still image or a moving image obtained by the image sensor in the photographing mode or the video communication mode. The processed image frame can be displayed on the display unit 151 and can be stored in the memory 170. [

The first and second operation units 123a and 123b may be collectively referred to as a manipulating portion as an example of a user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100 have. The first and second operation units 123a and 123b can be employed in any manner as long as the user is in a tactile manner such as touch, push, scroll, or the like. In addition, the first and second operation units 123a and 123b may be employed in a manner that the user operates the apparatus without touching the user through a proximity touch, a hovering touch, or the like.

In this figure, the first operation unit 123a is a touch key, but the present invention is not limited thereto. For example, the first operation unit 123a may be a mechanical key, or a combination of a touch key and a touch key.

The contents input by the first and second operation units 123a and 123b can be variously set. For example, the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, and the like, and the second operation unit 123b receives a command from the first or second sound output unit 152a or 152b The size of the sound, and the change of the display unit 151 to the touch recognition mode.

On the other hand, a rear input unit (not shown) may be provided on the rear surface of the terminal body as another example of the user input unit 123. The rear input unit is operated to receive a command for controlling the operation of the mobile terminal 100, and input contents may be variously set. For example, commands such as power on / off, start, end, scrolling, and the like, the size adjustment of the sound output from the first and second sound output units 152a and 152b, And the like can be inputted. The rear input unit may be implemented as a touch input, a push input, or a combination thereof.

The rear input unit may be disposed so as to overlap with the front display unit 151 in the thickness direction of the terminal body. For example, the rear input unit may be disposed at the rear upper end of the terminal body such that when the user holds the terminal body with one hand, the rear input unit can be easily operated using the index finger. However, the present invention is not limited thereto, and the position of the rear input unit may be changed.

When a rear input unit is provided on the rear surface of the terminal body, a new type of user interface using the rear input unit can be realized. When the first operation unit 123a is not disposed on the front surface of the terminal body in place of at least a part of the functions of the first operation unit 123a provided on the front surface of the terminal body, The display unit 151 may be configured as a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing the fingerprint of the user, and the controller 180 may use the fingerprint information sensed through the fingerprint recognition sensor as authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive the user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations to receive stereophonic sound.

The interface unit 160 is a path through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 may include a connection terminal for connection with another device (for example, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), a Bluetooth port A wireless LAN port, or the like), or a power supply terminal for supplying power to the mobile terminal 100. The interface unit 160 may be implemented as a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

And a second camera 121b may be disposed on a rear surface of the terminal body. In this case, the second camera 121b has a photographing direction which is substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. Such a camera can be named an 'array camera'. When the second camera 121b is configured as an array camera, images can be taken in various ways using a plurality of lenses, and a better quality image can be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 shines light toward the subject when the subject is photographed by the second camera 121b.

And a second sound output unit 152b may be additionally disposed in the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a and may be used for implementing a speakerphone mode in a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be embedded in the terminal body or formed in the case. For example, an antenna constituting a part of the broadcast receiving module 111 (see FIG. 1A) may be configured to be able to be drawn out from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 built in the terminal body or detachable from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160. In addition, the battery 191 may be configured to be wirelessly chargeable through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

The rear cover 103 is configured to be coupled to the rear case 102 so as to cover the battery 191 to restrict the release of the battery 191 and to protect the battery 191 from external impact and foreign matter . When the battery 191 is detachably attached to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102.

The mobile terminal 100 may be provided with an accessory that protects the appearance or supports or expands the function of the mobile terminal 100. [ One example of such an accessory is a cover or pouch that covers or accommodates at least one side of the mobile terminal 100. [ The cover or pouch may be configured to interlock with the display unit 151 to expand the function of the mobile terminal 100. Another example of an accessory is a touch pen for supplementing or extending a touch input to the touch screen.

Meanwhile, the mobile terminal according to the present invention can extract (detect, judge, determine, and sense) depth information from an image photographed through a camera using a camera and a lighting device.

In addition, the mobile terminal related to the present invention can shoot (or generate) a three-dimensional image using a camera and a lighting device. For example, the mobile terminal according to the present invention can convert (or generate) a two-dimensional image captured through a camera into a three-dimensional image based on the extracted depth information. As another example, the mobile terminal according to the present invention may determine the distance to the subject based on the light irradiated from the lighting device, and may shoot (or generate) a three-dimensional image through the camera based on the distance to the subject have.

Hereinafter, a method of extracting depth information from an image photographed using a camera and a lighting apparatus will be described in more detail with reference to the accompanying drawings. Hereinafter, extraction of depth information from an image photographed by a camera will be mainly described, but the contents related thereto can be applied to similar (or similar) imaging (or generation) of a three-dimensional image.

The mobile terminal 100 related to the present invention can extract depth information of an image received (or photographed) through the camera 121 (see FIG. 1A).

The image received through the camera may be referred to as a preview image. Specifically, the preview image refers to an image received through a camera in real time. The preview image can be changed based on whether the mobile terminal equipped with the camera 121 moves by an external force or a subject moves.

The image captured through the camera may be, for example, an image in which a preview image is captured. For example, the image may be displayed by touching a photographing button output on the display unit of the mobile terminal or by sensing a user gesture associated with the photographing of the preview image through the preview image, or by pressing a physical button provided on the mobile terminal And the like.

The image described in this specification may mean at least one of a preview image or a photographed image.

The depth information described in this specification can be named as a depth value, a depth information, a depth value, and the like. The depth information may mean a distance (or a distance value) between a subject corresponding to a pixel included in the image and a mobile terminal (more specifically, a camera).

For example, when the distance between the object corresponding to a specific pixel of the image and the mobile terminal is n, the depth information of the specific pixel may be a specific value corresponding to n. The specific value corresponding to n may be n or a value converted by a predetermined algorithm.

In addition, when the coordinates of the image are set as the x-axis and the y-axis perpendicular to the x-axis, the depth information may be a value corresponding to the z-axis perpendicular to the x-axis and the y-axis, respectively. The absolute value of the depth information may increase as the distance between the subject and the mobile terminal increases.

Such depth information can be utilized in various fields. For example, the depth information may be used to photograph / create a stereoscopic image, or may be used to generate 3D printing data used in a 3D printer, Can be used to detect movement.

The mobile terminal according to the present invention can extract depth information of an image received (or photographed) through a camera in various ways. For example, the control unit 180 (see FIG. 1A) may be a stereoscopic vision system for extracting depth information using at least two cameras, a depth vision system using a light emitting element arranged to form a predetermined pattern, A structure light method for extracting light, and a time-of-flight (ToF) method for extracting depth information based on a return time of light emitted from the light emitting device, or by extracting depth information can do.

Hereinafter, extraction of depth information using the structured optical method will be described.

The structured light system emits light to a subject by controlling a plurality of light emitting elements arranged to have a predetermined pattern, detects light that is reflected from the subject, and then detects the light (or a pattern of the sensed light) The depth information is extracted based on the depth information.

More specifically, in the structured light system, light is irradiated from a plurality of light emitting elements arranged to have a predetermined pattern to a subject, and a shift amount of the reflected light returning from the predetermined pattern (or, And the depth information is extracted.

For example, the control unit 180 of the mobile terminal according to the present invention controls the plurality of light emitting devices arranged to have a predetermined pattern to emit light to the subject. The control unit 180 of the mobile terminal may sense light reflected by the subject through the camera 121 or the sensing unit 140 (see FIG. 1A).

At this time, the controller 180 can extract the depth information of the image received through the camera 121 based on the detection result. For example, the control unit 180 may compare the pattern formed by the reflected light with the predetermined pattern to extract depth information of the image received through the camera 121. [

Specifically, the control unit 180 controls the brightness of a predetermined pattern (or a predetermined pattern in which a plurality of light emitting elements are arranged) emitting light from a plurality of light emitting elements and a light (or a light spot) (Or a deformed shape, a deformed distance, a deformed direction, etc.) with respect to each of the reflected light (or a light spot) based on the predetermined pattern, Etc.) or a return light pattern to extract the depth information of the image received through the camera 121. [0050] FIG.

As another example, in the structured optical system, the controller 180 compares the time / intensity of reflected light after the light is emitted from the plurality of light emitting devices, extracts depth information of the image received through the camera 121 can do.

To this end, the plurality of light emitting devices may be formed to emit light into a space corresponding to an image received through the camera 121.

The predetermined pattern may be determined (set) by the user, or may be predetermined when producing the product of the mobile terminal. In addition, the preset pattern may be changed by a request of a user or under the control of a control unit.

The plurality of light emitting devices may emit infrared rays. Further, the light emitting device may be a laser diode for converting an electric signal into an optical signal, for example, a vertical cavity surface emitting laser (VCSEL).

According to the present invention, by using the structured optical system, it is possible to extract depth information of an image through only one camera (infrared camera or 3D camera), and even when the subject is a single color, depth information can be extracted. In addition, accuracy of depth information can be improved by combining a structured optical system and a stereo vision system using at least two cameras, or by combining a structured optical system and a ToF system.

The ToF (Time of Flight) method may be a method of directly irradiating light on an object and measuring the depth information of the image by calculating the time of reflected light coming back.

In the stereo vision system, a plurality of cameras (for example, two cameras) are arranged symmetrically and a video image received through a first camera (for example, a left camera) among a plurality of cameras and a video A method of extracting depth information of an image received through a camera using disparity (or distance difference, interval) generated in the left and right parallax of an image received through a camera (for example, a right camera) have.

The mobile terminal related to the present invention can use a combination of a stereo vision system and a structured optical system.

2 is a conceptual diagram for explaining a camera and a lighting device provided in a mobile terminal according to the present invention.

As shown in FIG. 2 (a), in the mobile terminal related to the present invention, a plurality of cameras 121b and 121c may be provided together on one side of the mobile terminal. At this time, one surface of the mobile terminal 100 may be at least one of a rear surface, a front surface, and a side surface of the mobile terminal.

2 (a), a plurality of cameras 121b and 121c are provided on the rear surface of the mobile terminal body.

In addition, the illumination device 200 of the present invention may be provided on one surface provided with the plurality of cameras 121b and 121c.

The illumination device 200 may include a plurality of light emitting devices. As described above, the illumination device 200 may irradiate light having a predetermined pattern to extract depth information of an image through a structured light method. Here, the plurality of light emitting devices (or a plurality of light sources) may be, for example, a VCSEL.

As shown in FIG. 2A, the mobile terminal of the present invention includes a plurality of cameras 121a and 121b and a lighting device 200 capable of irradiating light of a predetermined pattern, The depth information of the image received through the camera can be extracted by combining the structured optical method.

The mobile terminal 100 of the present invention is not limited to any one of the stereo vision system, the structured optical system, and the ToF system, even if the plurality of cameras 121a and 121b are provided on one surface of the mobile terminal body. The depth information of the image received through the camera can be extracted by combining the two methods.

2 (b), the mobile terminal 100 of the present invention may use only the structured optical system using one camera 121 and the illumination apparatus 200, The depth information of the image received through the camera can be extracted using only the ToF method or combining the structured light method and the ToF method.

Meanwhile, the illumination device 200 included in the mobile terminal 100 according to the present invention may irradiate light to form (or have) a predetermined pattern, as described in the structured light method. The lighting apparatus 200 may include a plurality of light emitting elements. Here, the light emitting element may be the VCSEL described above.

The plurality of light emitting elements may be formed to have a predetermined pattern, or at least a part of the light emitting elements may be turned on to irradiate light in a predetermined pattern.

The plurality of light emitting devices (or die provided with the plurality of light emitting devices) may be, for example, a VCSELs array.

The control unit 180 of the mobile terminal according to the present invention can individually control a plurality of light emitting elements (a plurality of light sources) included in the lighting apparatus 200, respectively. Specifically, the control unit 180 can turn on / off a plurality of light emitting elements provided in the illumination device 200 individually. In addition, the control unit 180 can individually control the light emission intensity of the plurality of light emitting devices provided in the illumination device 200. In addition, the control unit 180 can individually control (determine) the light emission time points of the plurality of light emitting devices provided in the illumination device 200. [

The illumination device 200 may be individually turned on / off under the control of the controller 180, the intensity of light emission may be varied, or the light emission time may be changed. Accordingly, the pattern of light irradiated from the illumination device 200 (i.e., a predetermined pattern) can be varied.

As described above, the lighting apparatus 200 included in the mobile terminal of the present invention can control a plurality of light emitting elements (a plurality of VCSELs) by individually controlling the light pattern (or the intensity of light, And can be named Active light in this respect.

Meanwhile, the illumination device 200 related to the present invention can irradiate light (or a light spot) of a predetermined pattern to a subject so as to be used for extracting depth information of an image. Here, a light spot is a region (or a point) where light is irradiated to a subject or a region (or a point) where light is reflected to a mobile terminal (or a lighting device 200 or a camera or a sensing portion) . ≪ / RTI >

Since the plurality of light emitting devices included in the illumination device 200 are laser diodes (for example, VCSELs), when light is irradiated from a plurality of light emitting devices, (Laser) is irradiated. Accordingly, a light spot may be formed on the subject. Further, the present invention can detect (detect) light spots irradiated on the subject based on the light (laser) reflected back from the subject and returned to the mobile terminal.

Meanwhile, the illumination device 200 of the present invention may include a diffractive optical element (DOE). The diffractive optical element may be formed to diffract the light (light, laser) output from the light emitting element.

The diffractive optical element can diffract one light output from the light emitting element into a plurality of lights. Diffraction of light (light, laser) in this specification can be understood as meaning dividing light, duplicating light, dividing light, refracting a part of light, and the like. When one light output from the light emitting device is diffracted (divided) into a plurality of lights by the diffractive optical element, the sum of the intensities of the plurality of lights may be equal to the intensity of the one light.

In other words, the intensity of each of the plurality of lights (that is, any one of the plurality of lights diffracted by the diffractive optical element) may be weaker than the intensity of the one light before entering the diffractive optical element.

On the other hand, the illumination apparatus of the present invention can output a larger number of lights (light spots) than the plurality of light emitting elements by using the diffractive optical element.

For example, when the number of the plurality of light emitting elements is n and the number of the light (light spots) output when one light passes through the diffractive optical element is m, * m lights (light spots) can be output (or irradiated to a subject).

The illumination apparatus 200 of the present invention includes a plurality of light emitting elements and a diffractive optical element, and the diffractive optical element is a light emitting element that emits light output from the plurality of light emitting elements so as to form a predetermined pattern for each of the plurality of light emitting elements Can be diffracted.

That is, the illumination device 200 of the present invention may include a diffractive optical element that diffracts light to have the predetermined pattern for each light source. In other words, the diffractive optical element included in the illumination device 200 of the present invention can diffract (pass) light so that one light outputted from one light-emitting element forms a predetermined pattern. Accordingly, a plurality of lights output from the plurality of light emitting elements can be diffracted to pass through the diffractive optical element individually to form the predetermined pattern.

On the other hand, a conventional illumination device (or a conventional diffractive optical element) is formed so as to diffract light outputted from a plurality of light emitting elements so that a plurality of light emitting elements form a plurality of patterns.

The conventional illumination technique will be described in more detail with reference to Fig.

3 is a conceptual diagram for explaining a conventional lighting technique.

In Fig. 3, for convenience of explanation, an example in which light (or a light pattern) incident on the diffractive optical element is copied by 3 by 3 will be described.

Referring to FIG. 3, the light source unit 300 of the conventional illumination device may include a plurality of light emitting devices 300a, 300b, 300c, 300d, and 300e. The light source unit 300 may include a plurality of light emitting devices 300a, 300b, 300c, 300d, and 300e to form a specific pattern, and a plurality of light emitting devices 300a, 300b, 300c, 300d, and 300e.

At this time, when a plurality of lights output from the plurality of light emitting elements passes through the diffractive optical element, the light of the first type that is not diffracted by the diffractive optical element and the diffracted light of the first type diffracted by the diffractive optical element It can be divided into two kinds of lights 320a, 320b, 320c, 320d, 320e, 320f, 320g and 320h.

When any one of the lights is irradiated to the diffractive optical element, a part of the light can pass through the diffractive optical element without being diffracted (or not diffracted or refracted) by the diffractive optical element. That is, a part of the light is not diffracted or refracted by the diffractive optical element, and can pass through the diffractive optical element in a state of maintaining straightness (or in a straight line).

As described above, in this specification, light in which a part of light is not diffracted is referred to as a first kind of light. At this time, the first type of light may mean zero-order light. Referring to FIG. 3, the number of the first type of light 310 may be equal to the number of the plurality of light emitting devices 300a, 300b, 300c, 300d, and 300e.

On the other hand, when any one of the lights is irradiated to the diffractive optical element, the remaining portion except the part of the light is diffracted (or refracted) by the diffractive optical element. At this time, the remaining portion may be diffracted (or refracted) in a plurality of directions, i.e., different directions. As described above, the light diffracted (refracted) in the remaining part of the light will be referred to as a second kind of light. At this time, the second kind of light may mean first order light.

Referring to FIG. 3, the number of the plurality of second-type lights 320a, 320b, 320c, 320d, 320e, 320f, 320g, and 320h diffracted by the diffractive optical element varies depending on the design of the diffractive optical element , It may be larger than the number of the plurality of light emitting elements.

Here, the first type of light is the zero-order light and the second type of light is the first order light, which may be an example of a case in which one diffraction optical element is passed. For example, as shown in Fig. 3, when the light output from a plurality of light emitting devices passes through only one diffractive optical element, the passing light passes through the first type of light (zero-order light) and the second type of light (Primary light).

On the other hand, when passing through at least two diffractive optical elements, the first type of light and the second type of light may contain light of a different order.

For example, when light output from a single optical element passes through the first diffractive optical element, it is divided into undiffracted zero-order light and diffracted primary light.

Thereafter, when the zero-order light and the first-order light pass through the second diffractive optical element, the light that has passed through the second diffractive optical element passes through the zero-order diffracted light and the first-order diffracted light by the second diffractive optical element, Shielding and secondary light. In this case, the diffracted first-order light is the light diffracted by the zero-order light, and the diffracted second-order light is the light diffracted by the first-order light.

In this case, the first kind of light may include zero-order light and first order light which pass through the first diffractive optical element and are not diffracted by the second diffractive optical element. The second kind of light may include first and second light beams that pass through the first diffractive optical element and are diffracted by the second diffractive optical element.

That is, the first type of light described in this specification may mean light that is not diffracted by the last diffractive optical element when at least one diffractive optical element is provided.

Further, the second kind of light may mean light diffracted by the last diffractive optical element.

That is, the first type of light may include light that is not diffracted by the finally diffracting optical element among the plurality of lights to be irradiated to the object. The second kind of light may include light diffracted by the lastly diffracting optical element among a plurality of lights irradiated to the object.

In the conventional case, as shown in Fig. 3, the illumination device (or the diffractive optical element) can duplicate the light pattern on a pattern-by-pattern basis formed by a plurality of light emitting elements. Specifically, a conventional illumination device can be formed to diffract (replicate) a light pattern emitted from a plurality of light emitting devices by a diffractive optical element so as not to overlap each other on a pattern-by-pattern basis.

To this end, the conventional illumination device is configured such that the angle between the first kind of light (for example, zero-order light) and the second kind of light (for example, first order light) And the diffraction optical element is formed so that the pattern formed by the light of the second type is an angle that does not overlap with each other.

Thus, the pattern formed by the pattern formed by the plurality of light emitting elements, the pattern formed by the first type of light 310, and the second type of light 320a, 320b, ..., 320h, respectively, May be the same as shown in Fig.

Further, the conventional illumination device is configured to irradiate light so that the patterns formed by the patterns formed by the first type of light 310 and the patterns formed by the second type of light 320a, 320b, ..., 320h, respectively, .

In other words, the conventional illumination device has a structure in which a region where a first type of light 310 is irradiated (or a region connecting a point where a first type of light is irradiated) and a second type of light 320a, 320b, 320h) are irradiated with light so that the area to be irradiated (or the area to which the spot of the second kind of light is irradiated) does not overlap with each other.

That is, the conventional illumination device simply replicates and irradiates a plurality of patterns formed by the light output from the plurality of light emitting elements so as not to overlap with each other in a pattern unit, Only the role of expanding the field of view (FOV) to be examined can be performed.

Accordingly, since the conventional illumination apparatus irradiates the subject so that the first type of light and the second type of light do not overlap with each other, the number of lights (light spots) irradiated per unit area (that is, Spot)) is not possible.

3, the conventional illumination apparatus replicates the patterns of light output by the plurality of light emitting devices 300a, 300b, ..., 300e so that they do not overlap each other on a pattern-by-pattern basis, The number of output light (light spots) and the angle of view at which light is irradiated can be increased.

On the other hand, the present invention can provide an illumination device capable of irradiating light such that the number of light (light spots) irradiated per unit area is increased (i.e., the density of light (light spot) is increased).

Hereinafter, a lighting apparatus according to the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 4 is a conceptual view for explaining a lighting device provided in a mobile terminal according to an embodiment of the present invention, and FIGS. 5, 6, 7, and 8 are views for explaining an illumination technique using the lighting device of the present invention It is a conceptual diagram.

Referring to FIG. 4A, the illumination device 200 according to the present invention includes a plurality of optical elements 210a, 210b, 210c, ... and a part of light output from each of the plurality of light emitting elements, (DOE) 220, which may be a diffractive optical element.

The plurality of light emitting devices may be laser diodes, for example, a vertical cavity surface emitting laser (VCSEL).

The plurality of light emitting elements may be provided on a die and arranged to form a specific pattern, or at least a part of the plurality of light emitting elements may be turned on to form the specific pattern. The specific pattern may be determined from when the present illumination device is generated, or may be varied by changing the light emitting element to be turned on.

A die including the plurality of light emitting devices 210a, 210b, 210c, ... may be referred to as a light emitting unit 210. [ In the following description, reference numerals 210a, 210b, 210c, ... are used for a plurality of light emitting elements, and reference numeral 210 is used for a die having the plurality of light emitting elements do.

The diffractive optical element 220 may be disposed in a direction that outputs light from the plurality of light emitting elements. The diffractive optical element 220 can diffract a part of the light output from the light emitting element and diffract the remaining part of the light. That is, the diffractive optical element 220 diffracts a portion of the light output from the light emitting element and allows the remaining portion of the light to pass through the diffracted state (that is, in a straight line).

4A, the light output from the plurality of light emitting devices and transmitted through the diffractive optical element 220 is divided into a plurality of first types of light (for example, diffracted by the diffractive optical element 220) 422a, 424a, 426a, 420b, 422b, 424b, 426b, 420c, 422c, 424c, ..., 422c, 426c, ...).

The plurality of first types of light may mean light that is emitted from the plurality of light emitting elements and passes through the diffractive optical element 220 in a straight line (undiffracted). The plurality of second kinds of light may mean light that is diffracted by the diffractive optical element 220 and passes through the light output from the plurality of light emitting elements.

The diffractive optical element 220 can diffract (divide) one light into a plurality of lights. At this time, the diffractive optical element 220 of the present invention does not diffract light on a pattern-by-pattern basis while maintaining a pattern of a plurality of light beams output from a plurality of light emitting elements, Diffracts the diffracted light from the conventional diffractive optical element (see Fig. 3).

That is, the diffractive optical element of the present invention can diffract the incident light so that a specific pattern is formed per light output from the light emitting element.

Meanwhile, the illumination device of the present invention can be applied to various types of galvanic optical elements (for example, a microlens array 240, a reflective lens, a projection lens 230, a collimator lens, a GCA (Grating Cell Array) (Mirror / prism array), a fly eye lens, a birefringent element, or the like). The illumination apparatus of the present invention may include at least one of the refractive optical elements, and the arrangement position (or arrangement order) of the refractive optical element and the diffractive optical element may be various.

For example, the microlens array 240 is disposed between the plurality of light emitting devices 210 and the diffractive optical element 220, and the projection lens 230 is disposed between the plurality of light emitting devices 210 and the diffractive optical element 220, It can be arranged in a direction in which the light transmitted from the diffractive optical element proceeds.

The various lenses may be used for refracting light so that light output from a plurality of light emitting devices is incident on an optimized position of the diffractive optical element, or for changing the angle of view of light transmitted through the diffractive optical element.

For example, the microlenses provided in the microlens array 240 may be disposed at positions corresponding to the numbers corresponding to the plurality of light emitting devices 210a, 210b, 210c, 210d, and 210e.

For example, the microlens array 240 may refract light output from a plurality of light emitting devices so that a plurality of lights output from the plurality of light emitting devices are respectively incident on the diffraction optical device.

The microlens array 240 may, for example, refract light output from a plurality of light emitting elements such that a plurality of lights output from the light emitting elements disposed at different positions are all incident on the center of the diffractive optical element.

The projection lens 230 may be formed such that a plurality of first types of light transmitted through the diffractive optical element 220 and a plurality of second types of light travel in a wider angle of view. That is, when a plurality of lights transmitted through the diffraction optical element 220 are incident, the projection lens 230 refracts the plurality of lights so as to have a wider angle of view than the angle of view of the incident plurality of lights, .

An angle of view through which the plurality of lights transmitted through the projection lens 230 travels may be wider than an angle of view through which a plurality of lights not transmitted through the projection lens 230 travel.

The angle of view may be determined at the time of product launch, or may be determined according to a user design, and the angle of view may vary when the projection lens is formed of a projection lens having a variable bending rate.

In this specification, it is described that the diffraction optical element (DOE) performs splitting (duplicating) of incident light. However, the present invention is not limited to this, and the illumination device of the present invention can be applied to the case of using the above-described refractive optical element instead of the diffractive optical element, or combining the diffractive optical element and the refractive optical element.

The following explanations of the diffractive optical element can be applied to the same or similar analogy in the case where a refractive optical element is used or a diffractive optical element and a refractive optical element are combined.

The diffractive optical element 220 of the present invention is not limited to copying light in units of a pattern formed by light output from a plurality of light emitting elements (i.e., a pattern in which a plurality of light emitting elements are arranged) It is possible to replicate light so that the outputted light has a specific pattern.

For example, FIG. 4 (a) shows that the light output from one light emitting device passes through the diffractive optical element 220 and is divided into five lights. Here, the first kind of light among the five lights is one (410a), and the second type of light can be understood as the remaining four lights (420a, 422a, 424a, 426a). The light spot to which the five lights are irradiated may form a specific pattern.

3, the diffractive optical element of the present invention is formed not so as to duplicate a pattern in which a plurality of light emitting elements are arranged, on a pattern-by-pattern basis, but to divide one light output from one light emitting element into a specific pattern . In this way, dividing the diffractive optical element 220 so that one light forms a specific pattern can be applied to the lights output from each of the plurality of light-emitting elements.

In this case, patterns in which patterns of a plurality of light emitting elements are arranged are not replicated and irradiated on a pattern-by-pattern basis in a plane 400 spaced apart from the illumination device 200 by a predetermined distance, Are inspected to have a specific pattern.

As described above, in the diffractive optical element of the present invention, even if a plurality of light emitting elements are provided, the conventional diffractive optical element of FIG. 3 differs from the conventional diffractive optical element of FIG. 3 in that one light output from each light emitting element is divided into a plurality of lights, There is a difference.

Hereinafter, as shown in FIG. 4B, one light incident on the diffractive optical element 220 of the present invention is diffracted (divided) into a 3 by 3 shape (predetermined pattern) 500 Let's take an example. In this case, one light to be irradiated in the center of 3 by 3 is a first type of light (for example, 0-order light) and the remaining 8 lights are a second type of light (for example, .

The diffractive optical element 220 of the present invention can diffract (divide) a plurality of lights output from a plurality of light emitting elements into the 3 by 3 shape (predetermined pattern) and transmit the diffracted light. That is, the diffractive optical element 220 of the present invention may divide the light output from the light emitting device for each of a plurality of light emitting devices so that a predetermined pattern is formed. At this time, the first kind of light (i.e., non-diffracted light) among the plurality of lights forming the predetermined pattern is one 510 and the second kind of light (i.e., diffracted light) , 521, 522, 523, 524, 525, 526, 527).

Accordingly, in the illumination apparatus having a plurality of light emitting elements, when light is irradiated through the diffractive optical element, a plurality of first kinds of light and a plurality of second kinds of light can be irradiated. The number of the plurality of first types of light may be the same as the number of the plurality of light emitting elements.

For example, when a plurality of light emitting devices are six as shown in FIG. 5, and the number of lights divided by a predetermined pattern for each light output from each light source is nine (3 by 3), the first type The number of lights of the second kind may be 48 (6x8).

Referring to FIG. 5, the lighting apparatus 200 of the present invention may include a plurality of light emitting devices 210a, 210b, 210c, 210d, 210e and 210f.

The diffractive optical element 220 included in the illumination device 200 of the present invention may be positioned in a direction (for example, an optical axis direction) in which light output from a plurality of light emitting elements proceeds.

The diffractive optical element 220 of the present invention diffracts (splits, replicates) the incident light so that one light output from each of the plurality of light emitting elements becomes a predetermined pattern (for example, 3 by 3) . That is, the diffractive optical element of the present invention does not diffract (divide) a plurality of incident lights so as to correspond to a pattern in which a plurality of light emitting elements are disposed, but diffract The light can be diffracted (divided) in units of a light source so as to form a predetermined pattern.

In this case, the light output from the plurality of light emitting elements and transmitted through the diffractive optical element 220 is divided into a plurality of first types of light 510a, 510b, 510c, 510d, and 510e that are not diffracted by the diffractive optical element, And a plurality of second types of light 520a, ..., 527a, 520b, ..., 527b, ..., 520f, ..., 527f diffracted by the diffractive optical element.

The diffractive optical element 220 of the present invention may be configured such that a part of the light output from the plurality of light emitting elements is irradiated to at least a part of the plurality of second kinds of light to be irradiated into a region connecting the plurality of first kinds of light Can be diffracted.

For example, as shown in FIG. 5, in the diffractive optical element 220 of the present invention, one light output from the light emitting device may be diffracted (divided) so as to have a predetermined pattern for each light emitting device.

5, at least a part of the plurality of second kinds of light is included in the area A where a plurality of first types of light 510a, 510b, 510c, 510d, 510e, and 510f are connected, (E. G., 527a, 523b, 524b, 525b, 526b, 527b, 525c, 521d, 522d, 524d, 520e, 521e, 522e, 520f, 521f and 523f).

At this time, the remaining (e.g., 520a, 522c, and the like) other than the at least a part of the plurality of second kinds of light may be not irradiated in the area A connected with the plurality of first kinds of lights (That is, it can be irradiated onto an area outside the area A).

The area A connecting the plurality of first types of light may be, for example, an inner area of a figure formed when at least three light spots of the plurality of light spots irradiated with light of the first type are connected, .

Preferably, the region A may be a region formed when light spots selected to have the largest width among the light spots to which the plurality of first-type lights are irradiated are connected, but the present invention is not limited thereto .

5, when a plurality of first-type lights and a plurality of second-type lights are irradiated on a plane spaced apart from the illumination device 200 by a predetermined distance, the plurality of second- At least a part of the light may be irradiated (included) inside a region where the plurality of irradiated first types of light are connected.

As described above, in the illumination apparatus of the present invention, since the diffractive optical element diffracts (divides) one light beam output from each light emitting element so as to have a predetermined pattern, the plurality of light beams output from the plurality of light emitting elements are diffracted At least a part of the plurality of second kinds of light is irradiated (included) in the area where the plurality of first kinds of light are connected.

3, the conventional illumination device diffracts (splits) a plurality of light beams output from the plurality of light emitting devices so as not to overlap each pattern formed by a plurality of light emitting devices, 320a, 320b, ..., 320h can not be irradiated (included) in the area where the first type of light 320a, 320b, ..., 320h are connected.

6, the diffractive optical element 220 of the present invention is configured such that the distance between any one of the plurality of first-type lights and the second-type light related to the one of the plurality of lights is greater than the distance (Split or transmitted) the light output from the plurality of light emitting devices so that the light is within three times the minimum distance between the first kind of light of the first type.

For example, a plurality of first-type lights and a plurality of second-type lights transmitted through the diffractive optical element may be shown in a plane separated by a predetermined distance from the illumination device 200.

At this time, distances d1 and d2 between any one of the plurality of first types of light irradiated on the plane and the second type of light 522a and 524a associated with any one of the plurality of lights, May be within three times the minimum distance (a distance between 510e and 510f in Fig. 6) l between a plurality of first-type lights irradiated on the plane.

That is, when the light of the first type and the light of the second kind form a predetermined pattern, the first type of light 510a forming the predetermined pattern and the second type of light It can be understood that the light beams 520a, ..., 520f are related to each other.

One of the plurality of first kinds of light (for example, 510a) and the second type of light 520a, ..., 520f related to the one of the plurality of lights may be related to each other.

In other words, the distance between any one of the first type of light and the second type of light associated with the one of the lights is such that, when one light passes through the diffractive optical element, It can mean the distance between lights. The distance between the non-diffracted light and the diffracted light may have various values and have any value. However, the distances d1 and d2 between the non-diffracted light and the diffracted light preferably mean the maximum distance d2.

In summary, the diffractive optical element of the present invention has a maximum (maximum) distance (maximum (maximum) distance between the first type of light and the second type of light) between the undiffracted light 510a and the diffracted light 522a or 524a, Can transmit the light output from the plurality of light emitting devices so as not to exceed the minimum distance between the plurality of undiffracted lights (the first type of lights).

The distance between any one of the lights and the second type of light related to the one of the lights (or the distance between the lights divided by one light or the light of the first type divided in one light) (I.e., the distance between the two kinds of light) may not exceed three times the minimum distance between the plurality of first-type lights (i.e., d1 <3l or d2 <3l).

6, the distance between any one of the plurality of first-type lights and the second-type light associated with any one of the lights is smaller than the minimum distance between the plurality of first-type lights (Diffracted) from each other.

However, the diffractive optical element of the present invention is formed so that the distance between the first type of light and the second type of light split in one light is irradiated within three times shorter than the minimum distance between the plurality of first types of light . The above triple is the result derived from the experimental value which gives the optimized efficiency.

Referring to FIG. 3, the conventional illumination device divides (replicates) light in units of a pattern, so that the light of one type among lights of the first type and the light of the second type The distance should be at least three times greater than the minimum distance between the first class of light. This is because the conventional lighting device must be divided (replicated) without overlapping in units of patterns in which a plurality of light emitting elements are arranged.

On the other hand, referring to FIG. 7, the plurality of light emitting elements of the present invention may be arranged to form a specific pattern P.

At this time, the diffractive optical element of the present invention diffracts one light emitted from each light emitting element so as to have a predetermined pattern (3 by 3) for each light emitting element. At this time, since one light emitted from each light emitting element is diffracted to have the same predetermined pattern, a plurality of first types of light 510a, 510b, 510c, 510d, 510e, 510f correspond to the arrangement pattern of light emitting elements And the plurality of second types of light 520a, 520b, 520c, 520d, 520e, and 520f may also form the specific pattern P.

That is, as shown in FIG. 7, the plurality of first types of light 510a, 510b, 510c, 510d, 510e, and 510f and the plurality of second types of light are diffracted The light beams 520a, 520b, 520c, 520d, 520e, and 520f to be emitted may be irradiated to have a specific pattern P corresponding to the arrangement pattern P of the plurality of light emitting elements.

At this time, a part (B) of the first region occupied by the specific pattern (P) formed by the plurality of first kinds of light and the plurality of second kinds of light (concretely, A part B of the second area occupied by the specific pattern P formed by the light beams diffracted in the same direction among the light beams diffracted from each other can be overlapped with each other.

This is because the diffractive optical element of the present invention diffracts a plurality of light emitting elements so as to have a predetermined pattern (3 by 3) for each light emitting element, and diffracts the first type of light (undiffracted light) This is because the distance between the kinds of light (diffracted light) is made to be three times or less than the minimum distance between the plurality of first kinds of light (non-diffracted light).

As described above, according to the present invention, a pattern formed by a plurality of first-type lights and a pattern formed by a plurality of second-type lights (a pattern formed by a plurality of second- ) May overlap in some areas.

3, the conventional lighting apparatus divides (replicates) a plurality of lights output from a plurality of light emitting elements so as not to overlap in a pattern unit in which the plurality of light emitting elements are arranged. Therefore, The area occupied by the pattern of the light 310 and the area occupied by the pattern of the second-type light 320a do not overlap each other.

By the illumination technique as described above, the illumination device of the present invention can increase the number of light (light spots) (that is, the density of light) irradiated per unit area C.

Referring to FIG. 8, as the number of the plurality of second kinds of light diffracted by the diffractive optical element 220 increases, the density of the first and second types of light can be increased. In other words, as the number of the plurality of second types that have passed through the diffraction optical element 220 increases, the density of the first and second kinds of light (i.e., light (light spot) irradiated per unit area C) Is increased.

On the other hand, as shown in Fig. 3, the conventional illumination device (illumination technique) is designed so that even if the second kind of light diffracted by the diffractive optical element is increased, the amount of light (light spot) per unit area C The number (i.e., the density of the first and second kinds of light) is constant. This is because the conventional illumination apparatus replicates a plurality of lights output from the plurality of light emitting elements in units of a pattern in which a plurality of light emitting elements are arranged.

According to the present invention, it is possible to diffract (or divide) the light output from the light source into a plurality of lights by using the diffractive optical element, so that a larger number of light spots than the number of light sources can be diffracted And a mobile terminal including the illumination device.

Accordingly, the present invention requires only a small number of light sources, so that cost reduction and miniaturization of the terminal size can be achieved.

According to the present invention, the present invention is not a method of cloning (or dividing) a light source in units of patterns formed by a plurality of light sources, but by cloning (or dividing) a light source for each light source, the number of light spots per unit area, A new illumination device capable of increasing the density of spots can be provided.

Hereinafter, the illumination device described in Figs. 2 to 8 will be referred to as a pattern light source.

Meanwhile, the mobile terminal according to the present invention can acquire both depth information, edge information, and brightness information without performing calibration using one camera and dual illumination (i.e., a surface light source and a pattern light source) have.

Hereinafter, a mobile terminal of the present invention using one camera and dual illumination will be described in more detail with reference to the accompanying drawings.

FIG. 9 is a conceptual diagram for explaining a mobile terminal of the present invention, and FIGS. 10 and 11 are conceptual diagrams for explaining a method of controlling a lighting apparatus.

First, the mobile terminal of the present invention may include a lighting device 200. [

The illumination device 200 may include a pattern light source 200a and a planar light source 200b.

The pattern light source 200a may be formed to emit light in a predetermined pattern. The illumination device described in Figs. 2 to 8 irradiates light (light) to form a predetermined pattern, and thus may be a pattern light source (or pattern illumination).

The preset pattern means a light pattern in which light output from a pattern light source is irradiated to a subject by a position where a plurality of vixels are arranged, a photocopy method of the diffractive optical element, or the like.

Specifically, the pattern light source may include a plurality of VCSELs (and diffractive optical elements) such that a plurality of light spots are irradiated to a subject in a predetermined pattern.

For example, in the case where the diffractive optical element is not provided in the illuminating device, the plurality of vixels may be provided in the die in a position corresponding to the predetermined pattern so that a plurality of light spots are irradiated to the subject in a predetermined pattern.

On the other hand, the planar light source 200b can be formed to emit uniform light.

For example, the planar light source 200b may be formed to uniformly illuminate light in a region (space) where light is irradiated.

For example, the same amount of light can be irradiated on the first region irradiated with the light output from the planar light source 200b and the second region different from the first region, and the intensity (or brightness ) May be the same.

As shown in FIG. 9, the illumination device 200 of the present invention may include a pattern light source 200a and a planar light source 200b.

Here, the pattern light source 200a and the planar light source 200b may output infrared light. For example, the wavelength of the infrared light emitted from the pattern light source 200a and the surface light source 200b may be 940 nm.

Meanwhile, the camera 121 of the present invention may include a high-resolution sensor 900. The high-resolution sensor 900 may be, for example, an infrared sensor.

When the high-resolution sensor 900 is an infrared sensor, the camera 121 of the present invention may be referred to as an infrared camera (or an IR camera).

The high resolution sensor 900 may be configured to sense only the light output from the illumination device 200 (or the wavelength of the light output from the illumination device 200). For example, when the wavelength of the infrared light output from the pattern light source 200a and the surface light source 200b is 940 nm, the high-resolution sensor 900 may be configured to receive only light having a wavelength of 940 nm.

The control unit 180 of the present invention may include a lighting control device 202 for controlling the illumination device 200 and a sensor control device 902 for controlling the high resolution sensor 900. [

That is, the operation / function / control performed in the illumination control device 202 and the sensor control device 902 can be understood to be performed by the control unit 180.

Meanwhile, the pattern light source 200a, the planar light source 200b, and the illumination control device 202 may be electrically connected or disconnected from the mobile terminal and may be included in a physically detachable lighting device (or lighting module) .

Further, the high-resolution sensor 900 and the sensor control device 902 can be electrically connected or disconnected from the mobile terminal, and can be understood as being included in a physically detachable camera (or camera module).

The control unit 180 can photograph a three-dimensional image using the illumination device 200 and the camera 121. [

At this time, photographing a three-dimensional image should be understood as a concept including extracting depth information, extracting edge information, and extracting brightness information.

As described above, the illumination device 200 may include a pattern light source 200a for irradiating light of a predetermined pattern and a surface light source 200b for irradiating uniform light.

The pattern light source 200a may be the illumination device described with reference to FIGS.

The control unit 180 (or the illumination control device 202) can independently control the pattern light source 200a and the surface light source 200b.

The controller 180 may control the pattern light source 200a and the surface light source 200b in a predetermined manner in order to extract high-resolution depth information using one camera (for example, an infrared camera) .

For example, the control unit 180 can control the illumination device 200 so that the pattern light source 200a and the surface light source 200b alternately irradiate light.

Generally, the techniques for extracting depth information using illumination include a structured light method, a stereo method, and a ToF (Time of Flight) method, as described above.

In order to extract high-resolution depth information, the structure optical system and the stereo system require a high-resolution sensor and a light output of a dense pattern, which leads to an increase in the calculation amount.

Although the RGB-D (depth) combining method (a method of combining an image of a high-resolution general RGB sensor and a low-resolution depth information) using high-resolution information for low-resolution depth information has been proposed, )need.

The ToF method requires a special sensor that uses the phase difference of illumination, and the higher the resolution, the greater the cost increase.

In order to solve the above problems, it is an object of the present invention to extract high-resolution depth information without performing spatial calibration using a single camera (for example, an infrared camera), a pattern light source 200a and a planar light source 200b .

Specifically, the control unit 180 controls the pattern light irradiated from the pattern light source 200a and the pattern light irradiated from the surface light source 200b for each frame on which the camera 121 (or the high-resolution sensor 900) It is possible to alternately output the surface light.

For example, the control unit 180 controls the pattern light sources 200a and 200b while the planar light source 200b emits light (that is, does not emit light) while the planar light source 200b is emitting light, ) Can be caused to emit light.

10, when the camera 121 photographs the first frame, the control unit 180 emits the pattern light source 200a. After the camera captures the first frame, The illumination device 200 can be controlled to emit the surface light source 200b.

Specifically, during photographing of the first frame, the pattern light source 200a is turned on, the surface light source 200b is not lighted off, and while the second frame is being photographed, the surface light source 200b And the pattern light source 200a can emit no light.

The control unit 180 then causes the pattern light source 200a to emit light when the camera 121 shoots the third frame after shooting the second frame, When the four frames are photographed, the surface light source 200b can emit light.

Likewise, during the photographing of the third frame, the pattern light source 200a may emit light while the face light source 200b is not illuminated and the fourth frame is photographed.

10, the control unit 180 causes the pattern light source 200a to emit light for at least a part of the time of photographing the first frame (or the third frame), and the second frame (or the fourth frame) The surface light source 200b can emit light for at least a part of the time of photographing the surface light source 200b.

For example, the control unit 180 may irradiate the pattern light source 200a or the planar light source 200b with respect to all of the frames for photographing one frame, and the pattern light source 200a and the planar light source 200b The lighting device 200 can be controlled so as not to emit light.

The at least part of the time may mean a time obtained by subtracting the predetermined time from the total time of shooting one frame.

The reason why both the pattern light source 200a and the surface light source 200b are not lighted for the predetermined time during the shooting of one frame is that the time when the aperture of the camera is opened based on the strobeing signal, In order to prevent the interference between the planar light source and the light emitted from the pattern light source.

9, the control unit 180 can acquire the pattern light receiving image 910 based on the emission of the pattern light source 200a during the photographing of the first frame (or the third frame).

Here, the pattern light receiving image 910 may mean an image photographed while light of a predetermined pattern outputted from the pattern light source 200a is irradiated to the subject.

Specifically, the pattern light receiving image 910 is reflected by the subject after the light of a predetermined pattern outputted from the pattern light source 200a is irradiated to the subject and is received by the high resolution sensor 900 (or the camera 121) (Or information on the pattern light).

The pattern light receiving image 910 is an image used for extracting depth information, and may be named as a depth image. Here, the first frame (or the third frame) may be a pattern light receiving image.

The control unit 180 can acquire the plane light reception image 920 based on the emission of the plane light source 200b during the photographing of the second frame (or the fourth frame).

The plane light reception image may mean an image taken while the uniform light outputted from the plane light source 200a is irradiated to the subject.

Specifically, the plane light reception image is obtained by projecting the uniform light output from the planar light source 200b onto the subject and then reflecting the plane light (or the plane light) received by the high resolution sensor 900 (or the camera 121) (E.g., information about the image).

The plane light reception image 920 is an image used for extracting brightness information and edge information of a subject, and may be named as a monochrome image or a gray image. Here, the second frame (or the fourth frame) may be a plane light receiving image.

The control unit 180 can extract the depth information through the first frame (or the third frame) captured while the pattern light source 200a is being emitted (S912). Here, the depth information may be low resolution depth information.

Specifically, the control unit 180 can lower the resolution and extract the low-resolution depth information through the binning process of the first frame.

Here, the low-resolution depth information is extracted through a structured optical method when one camera is provided, and may be extracted in a stereo manner when two cameras are provided.

Also, the controller 180 may extract at least one of high-resolution brightness information and edge information of a subject using the second frame (or the fourth frame) photographed while the surface light source 200b is emitting light .

The control unit 180 can generate one three-dimensional image using the first frame and the second frame captured through the camera 121. [

The high-resolution brightness information may include information such as an outline of a subject and a shadow.

That is, the edge information of the subject may be understood to be included in the brightness information.

Specifically, the control unit 180 extracts low-resolution depth information using the first frame, extracts high-resolution brightness information (including edge information of the subject) using the second frame, and outputs the low- Information can be combined to extract (or reconstruct) the high-resolution depth information (S922, S924).

The control unit 180 may use a combination algorithm (for example, a method using an algorithm using shadow information and a method using an artificial intelligent learning algorithm (for example, an RGBD-fusion method)) to combine the low-resolution depth information and the high- Can be used.

In addition, the control unit 180 can also extract high-resolution brightness information using the second frame (S926).

The mobile terminal of the present invention can generate one three-dimensional image using two frames.

That is, the control unit 180 extracts depth information through the first frame 910 captured while the pattern light source 200a is irradiated, and outputs the depth information to the second frame 920 photographed while the surface light source 200b is irradiated. It is possible to extract high-resolution depth information and high-resolution brightness information.

As shown in FIG. 10, the controller 180 can generate one three-dimensional image using the first frame 910 and the second frame 920, that is, two frames.

In other words, the controller 180 emits the pattern light source 200a and the planar light source 200b while alternately lighting the frame light source 200b. The first frame and the planar light source 200b, which are photographed when the pattern light source 200a emits light, Resolution depth information and high-resolution brightness information can be extracted using only one camera using the second frame photographed at the time when the first frame is captured.

Hereinafter, with reference to the accompanying drawings, a description will be made of an embodiment in which the pattern light source 200a is caused to emit light while photographing the first frame (or the third frame).

Referring to FIG. 11, the pattern light source 200a of the present invention may include a plurality of light emitting devices 1100. FIG.

The plurality of light emitting devices 1100 may be provided on the die and arranged to form a specific pattern (for example, a predetermined pattern).

The plurality of light emitting devices may be grouped into a plurality of groups 1110, 1120, 1130, 1140, 1150, 1160, 1170, 1180, 1190.

The plurality of light emitting devices may be grouped into a plurality of groups, which means that the plurality of light emitting devices are controlled on a group basis.

Specifically, the control unit 180 can control the plurality of groups (or the plurality of light emitting elements) on a group basis.

For example, the control unit 180 can independently control the light emitting elements included in the first group 1110 and the light emitting elements included in the second group 1120 among the plurality of groups.

For example, the control unit 180 can turn off the light emitting elements included in the second group 1120 while the light emitting elements included in the first group 1110 are turned on.

The control unit 180 controls a plurality of groups on a group basis, which means that a plurality of light emitting devices 1100 are turned on or off in group units. Here, the ON state (or ON state) means that the light emitting element emits light, and the OFF state (or OFF state) may mean that the light emitting element emits no light.

On the other hand, the control unit 180 can sequentially emit light in a predetermined order for a plurality of groups.

The predetermined order may be determined at the time of product design, or may be changed by user setting.

Referring to FIG. 11, for example, the preset order includes a first group 1110, a second group 1120, The eighth group 1180, and the ninth group 1190 in that order.

In this case, the control unit 180 can sequentially emit the plurality of groups in the order of the first group to the ninth group. Here, the meaning of emitting a plurality of groups means that a plurality of light emitting elements included in a plurality of groups are caused to emit light in a group unit.

In this case, when the plurality of light emitting elements included in the first group 1110 are on (i.e., emitting light), the plurality of light emitting elements included in the remaining second to ninth groups are turned off (i.e., Lt; / RTI &gt;

Then, when the first group 1110 emits light for a predetermined time, the plurality of light emitting elements included in the second group 1120 are turned on, and the first group, the third group to the ninth group are turned off .

In this manner, the control unit 180 can sequentially emit a plurality of groups in a predetermined order. In this case, at least two groups do not emit light at the same time. That is, the control unit 180 may control the illuminating device so that at least two groups among the plurality of groups emit light at the same time without emitting light at the same time.

In other words, as shown in Fig. 11, the control unit 180 can emit a plurality of groups so that the times at which the plurality of groups emit light do not overlap.

In Fig. 11, there is no time interval between the first group and the second group. However, the present invention is not limited thereto. There may be a predetermined time interval between the first group and the second group. (The same applies to the second to third groups, the third to fourth groups, ..., and the eighth to ninth groups).

On the other hand, as shown in FIG. 11, the control unit 180 can define one set (SET) in which a plurality of groups sequentially emit light sequentially.

The time at which the one set is performed may be determined by the product performance and the control time of the control unit, and may be constant.

The control unit 180 can emit the plurality of groups by a plurality of sets while photographing the first frame through the camera.

Specifically, when the camera captures the first frame, the control unit 180 controls the illumination device such that one set of the plurality of groups sequentially emitting light in a predetermined order is performed a plurality of times, as shown in Fig. 11 Can be controlled.

The present invention has the effect of lowering the peak current required for causing a plurality of elements to emit light by sequentially emitting light in a predetermined order without simultaneously emitting a plurality of groups.

Further, the present invention can increase the number of pattern lights irradiated on a subject by performing a set in which a plurality of groups are sequentially emitted all at once.

When the number of pattern lights irradiated to the subject increases, the number of pattern lights reflected and reflected after being irradiated to the subject received by the camera increases, so that the control unit can more easily extract the depth information from the depth image.

Here, the time during which one set in which a plurality of groups are sequentially emitted in a predetermined order is performed may be constant.

Also, the control unit 180 can vary the time taken to photograph the first frame. The time for photographing the first frame may correspond to, for example, the time for which the diaphragm is kept open (or the time for which the diaphragm is closed after the diaphragm is closed).

The number of times of the plurality of sets performed during the shooting of the first frame may be varied based on the time taken to photograph the first frame.

That is, since the time required to perform the one set is constant, if the time taken to photograph the first frame is short, the number of times the set is performed is small, and when the time taken to photograph the first frame is long, The number of times to perform the set can be increased.

Although not shown, the controller 180 may emit only one set of the plurality of groups so that the plurality of groups are sequentially emitted all at once during the emission of the pattern light source 200a.

According to the present invention, it is possible to extract high-resolution high-quality depth information and high-resolution brightness information through the above-described configuration, and combine them to perform face recognition, three-dimensional mapping, or object classification.

Further, in the present invention, not only the outline of the object but also the shape of the surface or the shape of the figure (trademark or mark, etc.) can be used together by using the depth information and the brightness information. This can be performed based on the brightness information obtained in the plane light receiving image obtained while emitting the surface light source.

Further, the present invention can perform iris recognition or visual perception by using not only a pattern light source but also a planar light source, and can perform not only a three-dimensional object but also information (for example, Characters, etc.) can also be perceived.

According to the present invention, the present invention can provide a mobile terminal capable of improving the quality of depth information by using one camera and dual illumination (for example, a surface light source and a pattern light source).

In addition, the present invention can provide a new mobile terminal capable of extracting depth information and edge information by using only one camera without using a plurality of cameras by emitting light by crossing a plane light source and a pattern light source.

In addition, the present invention can provide a new control method that can perform face recognition, line recognition, and fusion mapping using a black-and-white image obtained when the surface light source is irradiated and a depth image obtained when the pattern light source is irradiated .

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (12)

A lighting device;
camera; And
And a controller for photographing the three-dimensional image using the illumination device and the camera,
The illumination device includes:
A pattern light source for irradiating light of a predetermined pattern; And
And a surface light source for irradiating uniform light,
Wherein,
And controls the illumination device to alternately irradiate light with the pattern light source and the surface light source.
The method according to claim 1,
Wherein,
Wherein the planar light source emits light while the pattern light source emits light,
Wherein the pattern light source emits light while the surface light source emits light.
The method according to claim 1,
Wherein,
When the camera photographs the first frame, emits the pattern light source,
And controls the illumination device to emit the surface light source when the camera photographs the second frame after shooting the first frame.
The method of claim 3,
Wherein,
When the camera photographs the third frame after photographing the second frame, the pattern light source is caused to emit light,
Wherein when the camera captures the fourth frame after capturing the third frame, the surface light source emits light.
The method of claim 3,
Wherein,
The pattern light source is caused to emit light for at least part of the time for photographing the first frame,
And the surface light source is caused to emit light for at least part of the time for photographing the second frame.
The method of claim 3,
Wherein,
Extracting depth information through a first frame photographed while the pattern light source emits light,
And extracts brightness information and edge information of a subject using the second frame photographed while the surface light source emits light.
The method of claim 3,
Wherein,
And generates one three-dimensional image using the first frame and the second frame captured through the camera.
The method according to claim 1,
Wherein the pattern light source includes a plurality of light emitting elements,
Wherein the plurality of light emitting elements are grouped into a plurality of groups,
Wherein,
And controls the plurality of groups on a group basis.
9. The method of claim 8,
Wherein,
And sequentially emit light in a predetermined order for each of the plurality of groups.
10. The method of claim 9,
Wherein,
Wherein the plurality of groups emit light so that the times of light emission of the plurality of groups do not overlap each other.
10. The method of claim 9,
Wherein the plurality of groups are sequentially emitted in a single set,
Wherein,
Wherein the camera emits the plurality of groups by a plurality of sets while photographing the first frame.
12. The method of claim 11,
The time at which the one set is performed is constant,
Wherein the number of times of the plurality of sets performed while photographing the first frame varies based on the time taken to photograph the first frame.

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