WO2021112292A1

WO2021112292A1 - Mobile terminal

Info

Publication number: WO2021112292A1
Application number: PCT/KR2019/017103
Authority: WO
Inventors: 강진원; 신윤섭; 지석만; 이창환; 조아영
Original assignee: 엘지전자 주식회사
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2021-06-10

Abstract

A mobile terminal according to one embodiment comprises: a light emission unit including a plurality of light sources for emitting light at divided regions; a light reception unit for receiving the light reflected from the divided regions; and a processor connected to the light emission unit and the light reception unit so as to acquire depth information about the divided regions through a phase difference between the light emitted from the light emission unit and the light received by the light reception unit, wherein the processor controls the light emission unit so as to adjust the amount of light to be emitted at each of the divided regions.

Description

mobile terminal

In acquiring a depth image through a mobile terminal, it can be applied to a technical field for controlling the amount of light irradiated to a divided area.

The terminal may be divided into a mobile/portable terminal and a stationary terminal according to whether the terminal can be moved. Again, the mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal depending on whether the user can carry it directly.

The functions of mobile terminals are diversifying. For example, there are functions for data and voice communication, photo and video shooting through a camera, voice recording, music file playback through a speaker system, and image or video output to the display. Some terminals add an electronic game play function or perform a multimedia player function. In particular, recent mobile terminals can receive multicast signals that provide broadcast and visual content such as video or television programs.

As such a mobile terminal has diversified functions, it is implemented in the form of a multimedia device equipped with complex functions such as, for example, taking pictures or videos, playing music or video files, and receiving game broadcasts. .

In addition, the mobile terminal is Bluetooth (Bluetooth™), RFID (Radio Frequency Identification), infrared communication (Infrared Data Association, IrDA), UWB (Ultra Wideband), ZigBee, NFC (Near Field Communication), Wireless USB (Wireless Universal Serial Bus) ) can transmit and receive information to and from external devices through short-range communication technologies such as

The mobile terminal may obtain a depth image through the TOF camera, and may obtain 3D information of the subject through the depth image. Recently, the use of TOF cameras in mobile terminals is increasing.

In acquiring a depth image through a mobile terminal, an object of the present invention is to efficiently control the amount of light irradiated to a divided area.

In order to achieve the above or other object, a mobile terminal according to an embodiment includes a light irradiator including a plurality of light sources each irradiating light toward a divided area, and receiving light reflected in response to the divided area. A light receiving unit, and a processor connected to the light emitting unit and the light receiving unit to obtain depth information of the divided region through a phase difference between the light irradiated from the light emitting unit and the light received by the light receiving unit, the processor comprising: may be characterized in that it controls the light irradiator to adjust the amount of light irradiated to each of the divided areas.

In addition, according to an embodiment, the processor controls the pulse intensity of the first light source for irradiating light to the first divided area and the second light source for irradiating light to the second divided area, to thereby control the first divided area and the second divided area. It may be characterized in that the amount of light irradiated to the two divided areas is adjusted.

In addition, according to an embodiment, the processor controls a pulse ratio of a first light source irradiating light to the first divided region and a second light source irradiating light to the second divided region, and the first divided region and the It may be characterized in that the amount of light irradiated to the second divided area is adjusted.

In addition, according to an embodiment, the processor controls the number of pulses of the first light source irradiating light to the first divided area and the second light source irradiating light to the second divided area, and the first divided area and adjusting the amount of light irradiated to the second divided area.

In addition, according to an embodiment, the light irradiation unit includes a plurality of first light sources for irradiating light to the first divided area and a plurality of second light sources for irradiating light to the second divided area, respectively, and the processor includes a plurality of The number of light sources emitted from the first light source and the plurality of second light sources may be respectively controlled to adjust the amount of light irradiated to the first divided area and the second divided area.

In addition, according to an embodiment, the light irradiator includes a plurality of first light sources for irradiating light to the first divided region and a plurality of second light sources for irradiating light to the second divided region, respectively, and a plurality of the first The light source includes a 1-1 light source having a relatively strong output and a 1-2 light source having a relatively weak output, and the plurality of second light sources includes a 2-1 light source having a relatively strong output and a relatively weak output. a second light source, wherein the processor controls a combination of light sources emitting light from a plurality of the first light sources and a plurality of second light sources, respectively, and the amount of light irradiated to the first divided area and the second divided area It may be characterized in that it is adjusted.

Also, according to an embodiment, the processor may adjust the amount of light applied to the divided area based on depth information of the divided area.

Also, according to an embodiment, the processor applies a relatively small amount of light when the subject is relatively close to the divided area, and applies a relatively large amount of light when the subject is relatively far in the divided area. can

Also, according to an embodiment, the processor may adjust the amount of light applied to the divided region in the N+1th frame based on depth information acquired through the Nth frame.

Also, according to an embodiment, the processor may adjust the amount of light applied to the divided area based on motion information of the subject in the divided area.

In addition, according to an embodiment, when there is no movement of the subject in the divided area, a relatively small amount of light is applied, and when there is movement of the subject in the divided area, a relatively large amount of light is applied. can do.

In addition, according to an embodiment, the processor adjusts the amount of light applied to the divided area in the N+2th frame based on the motion information of the subject acquired through the Nth frame and the N+1th frame. can be done with

Also, according to an embodiment, the processor may control the light irradiator to sequentially irradiate light toward the divided area.

The mobile terminal according to an embodiment may reduce power consumed to acquire depth information.

The mobile terminal according to an embodiment may reduce the maximum peak power required to acquire depth information.

The mobile terminal according to an embodiment may obtain depth information efficiently by uniformly irradiating the amount of light to the divided area.

The mobile terminal according to an embodiment may efficiently acquire depth information by adjusting the amount of light irradiated to the divided areas.

1A is a block diagram illustrating a mobile terminal according to an embodiment.

1B and 1C are conceptual views of a mobile terminal viewed from different directions according to an exemplary embodiment.

2 is a conceptual diagram illustrating a method for a mobile terminal to acquire depth information according to an embodiment.

3 and 4 are diagrams for explaining a difference in the amount of light reaching a photographing area.

5 is a view illustrating a light irradiator according to an exemplary embodiment.

FIG. 6 is a view for explaining a method of adjusting the amount of light by using the pulse intensity of a light source, according to an exemplary embodiment.

7 is a view for explaining a method of adjusting the amount of light by using a pulse ratio of a light source, according to an exemplary embodiment.

8 is a diagram for explaining a method of adjusting the amount of light using the number of pulses of a light source, according to an embodiment.

9 illustrates a pulse irradiated from the light emitting unit and a pulse received from the light receiving unit, according to an embodiment.

10 is a diagram illustrating light irradiation according to an embodiment.

11 and 12 are diagrams for explaining a light emission pattern of a light source group irradiating light to a specific divided area.

13 illustrates a processor for adjusting the amount of light, according to an embodiment.

14 illustrates a processor for adjusting the amount of light, according to an embodiment.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

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

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, 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 system, and a slate PC. , tablet PCs, ultrabooks, wearable devices, for example, watch-type terminals (smartwatch), glass-type terminals (smart glass), HMD (head mounted display), etc. may be included. have.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiment described in this specification may be applied to a fixed terminal such as a digital TV, a desktop computer, and a digital signage, except when applicable only to a mobile terminal. will be.

1A to 1C, FIG. 1A is a block diagram illustrating a mobile terminal related to the present invention, and FIGS. 1B and 1C are conceptual views of an example of the mobile terminal related to the present invention viewed from 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 a power supply unit 190 . ) and the like. The components shown in FIG. 1A are not essential for implementing the mobile terminal, so the mobile terminal described in this specification may have more or fewer components than those listed above.

More specifically, among the components, the wireless communication unit 110 is between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 and an external server. It may include one or more modules that enable wireless communication between them. 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 reception module 111 , a mobile communication module 112 , a wireless Internet module 113 , a short-range communication module 114 , and a location information module 115 . .

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

The sensing unit 140 may include one or more sensors 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, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. Sensor (G-sensor), gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor: infrared sensor), fingerprint sensor (finger scan sensor), ultrasonic sensor , optical sensors (eg, cameras (see 121)), microphones (see 122), battery gauges, environmental sensors (eg, barometers, hygrometers, thermometers, radiation detection sensors, It may include at least one of a thermal sensor, a gas sensor, etc.) and a chemical sensor (eg, an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification may combine and utilize information sensed by at least two or more of these sensors.

The output unit 150 is for generating an output related to visual, auditory or tactile sense, and includes at least one of a display unit 151 , a sound output unit 152 , a haptip module 153 , and an optical output unit 154 . can do. The display unit 151 may implement a touch screen by forming a layer structure with the touch sensor or being formed integrally with the touch sensor. Such a touch screen may function as the user input unit 123 providing an input interface between the mobile terminal 100 and the user, and may provide an output interface between the mobile terminal 100 and the user.

The interface unit 160 serves as a passage with various types of external devices connected to the mobile terminal 100 . Such an interface unit 160, a wired / wireless headset port (port), an external charger port (port), a wired / wireless data port (port), a memory card (memory card) port, for connecting a device equipped with an identification module It may include at least one of a port, an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port. In response to the connection of the external device to the interface unit 160 , the mobile terminal 100 may 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) driven in the mobile terminal 100 , data for operation of the mobile terminal 100 , and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions (eg, incoming calls, outgoing functions, message reception, and outgoing functions) of the mobile terminal 100 . Meanwhile, the application program may be stored in the memory 170 , installed on the mobile terminal 100 , and driven to perform an operation (or function) of the mobile terminal by the controller 180 .

In addition to the operation related to the application program, the controller 180 generally controls the overall operation of the mobile terminal 100 . The controller 180 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170 .

In addition, the controller 180 may control at least some of the components discussed with reference to FIG. 1A in order to drive an application program stored in the memory 170 . Furthermore, in order to drive the application program, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 with each other.

The power supply unit 190 receives external power and internal power under the control of the controller 180 to supply power to each component included in the mobile terminal 100 . The power supply 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

At least some of the respective components may operate cooperatively with each other to implement an operation, control, or control method of a mobile terminal according to various embodiments to be 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, before looking at various embodiments implemented through the mobile terminal 100 as described above, the above-listed components will be described in more detail with reference to FIG. 1A .

First, referring to the wireless communication unit 110 , the broadcast reception module 111 of the wireless communication unit 110 receives a broadcast signal and/or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more of the broadcast reception 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 includes technical standards or communication methods for mobile communication (eg, Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (CDMA2000), EV -DO (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), WCDMA (Wideband CDMA), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Long Term Evolution-Advanced, etc.) transmits/receives a radio signal to and from at least one of a base station, an external terminal, and a server on a mobile communication network constructed in accordance with the above.

The wireless signal may include various types of data according to transmission/reception of a voice call signal, a video call signal, or a text/multimedia message.

The wireless Internet module 113 refers to a module for wireless Internet access, and may be built-in or external to the mobile terminal 100 . The wireless Internet module 113 is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies.

As wireless Internet technologies, for example, WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro (Wireless Broadband), WiMAX (World Interoperability for Microwave Access), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), etc., and the wireless Internet module ( 113) transmits and receives data according to at least one wireless Internet technology within a range including Internet technologies not listed above.

From the point of view that wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A, etc. is made through a mobile communication network, the wireless Internet module 113 performs wireless Internet access through the mobile communication network. ) may be understood as a type of the mobile communication module 112 .

Short-range communication module 114 is for short-range communication, Bluetooth (Bluetooth), RFID (Radio Frequency Identification), infrared communication (Infrared Data Association; IrDA), UWB (Ultra Wideband), ZigBee, NFC At least one of (Near Field Communication), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (USB) technologies may be used to support short-range communication. The short-distance communication module 114 is, between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or the mobile terminal 100 through wireless area networks (Wireless Area Networks). ) and another mobile terminal (100, or an external server) can support wireless communication between the network located. The local area network may be a local area network (Wireless Personal Area Networks).

Here, the other mobile terminal 100 is a wearable device capable of exchanging data (or interworking) with the mobile terminal 100 according to the present invention, for example, a smart watch, smart glasses. (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 in the vicinity of the mobile terminal 100 . Furthermore, when the detected wearable device is a device authenticated to communicate with the mobile terminal 100 according to the present invention, the controller 180 transmits at least a portion of data processed by the mobile terminal 100 to the short-range communication module ( 114) to transmit to the wearable device. Accordingly, the user of the wearable device may use data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a call is received in the mobile terminal 100, the user performs a phone call through the wearable device, or when a message is received in the mobile terminal 100, the user receives the received call through the wearable device. It is possible to check the message.

The location information module 115 is a module for acquiring a location (or current location) of a mobile terminal, and a representative example thereof includes a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, if the mobile terminal utilizes a GPS module, it can acquire the location of the mobile terminal by using a signal transmitted from a GPS satellite. As another example, if the mobile terminal utilizes the Wi-Fi module, the location of the mobile terminal may be obtained based on information of the Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal. If necessary, the location information module 115 may perform any function of other modules of the wireless communication unit 110 to obtain data on the location of the mobile terminal as a substitute or additionally. 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 input of image information (or signal), audio information (or signal), data, or information input from a user. For input of image information, the mobile terminal 100 has one Alternatively, a plurality of cameras 121 may be provided. The camera 121 processes an image frame such as a still image or a moving image obtained by an image sensor in a video call mode or a photographing mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170 . On the other hand, the plurality of cameras 121 provided in the mobile terminal 100 may be arranged to form a matrix structure, and through the cameras 121 forming the matrix structure in this way, various angles or focal points are applied to the mobile terminal 100 A plurality of image information with 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 an external sound signal as electrical voice data. The processed voice data may be utilized in various ways according to a function (or a running application program) being performed by the mobile terminal 100 . Meanwhile, various noise removal algorithms for removing noise generated in the process of receiving an external sound signal may be implemented in the microphone 122 .

The user input unit 123 is for receiving information from a user. When information is input through the user input unit 123 , the controller 180 may control the operation of the mobile terminal 100 to correspond to the input information. . The user input unit 123 is a mechanical input means (or a mechanical key, for example, a button located on the front, rear or side of the mobile terminal 100, a dome switch, a jog wheel, jog switch, etc.) and a touch input means. As an example, the touch input means consists of a virtual key, a soft key, or a visual key displayed on the touch screen through software processing, or a part other than the touch screen. It may be made of a touch key (touch key) disposed on the. On the other hand, the virtual key or the visual key, it is possible to be displayed on the touch screen while having various forms, for example, graphics (graphic), text (text), icon (icon), video (video) or these can be made by a combination of

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 sensing signal corresponding thereto. The controller 180 may control the driving or operation of the mobile terminal 100 or perform data processing, functions, or operations related to an 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 or absence of an object approaching a predetermined detection surface or an object existing in the vicinity without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor 141 may be disposed in an inner region of the mobile terminal covered by the touch screen described above or in the vicinity of the touch screen.

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

On the other hand, for convenience of description, the act of approaching an object on the touch screen without contacting it so that the object is recognized that it is located on the touch screen is called “proximity touch”, and the touch The act of actually touching an object on the screen is called "contact touch". The position where the object is touched in proximity on the touch screen means a position where the object is perpendicular to the touch screen when the object is touched in proximity. The proximity sensor 141 may detect a proximity touch and a proximity touch pattern (eg, proximity touch distance, proximity touch direction, proximity touch speed, proximity touch time, proximity touch position, proximity touch movement state, etc.) have. Meanwhile, the controller 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 printed on the touch screen. Furthermore, the controller 180 may control the mobile terminal 100 to process different operations or data (or information) according to whether a touch to the same point on the touch screen is a proximity touch or a contact touch. .

The touch sensor receives a touch (or touch input) applied to the touch screen (or the display unit 151) using at least one of various touch methods such as a resistive film method, a capacitive method, an infrared method, an ultrasonic method, and a magnetic field method. detect

As an example, the touch sensor may be configured to convert a change in pressure applied to a specific part of the touch screen or a change in capacitance occurring in a specific part of the touch screen into an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the time of a touch, an electrostatic capacitance at the time of a touch, etc. in which a touch object applying a touch on the touch screen is touched on the touch sensor. Here, the touch object is an object that applies a touch to the touch sensor, and may be, for example, a finger, a touch pen or a stylus pen, a pointer, or the like.

As such, when there is a touch input to the touch sensor, a signal(s) corresponding thereto is sent to the touch controller. The touch controller processes the signal(s) and then transmits corresponding data to the controller 180 . Accordingly, the controller 180 can know which area of the display unit 151 has been touched, and the like. Here, the touch controller may be a component separate from the controller 180 , or may be the controller 180 itself.

Meanwhile, the controller 180 may perform different controls or may perform the same control according to the type of the touch object that touches the touch screen (or a touch key provided in addition to the touch screen). Whether to perform different control or the same control according to the type of the touch object may be determined according to the current operating state of the mobile terminal 100 or a running application program.

On the other hand, the above-described touch sensor and proximity sensor are independently or in combination, a short (or tap) touch on the touch screen (short touch), long touch (long touch), multi touch (multi touch), drag touch (drag touch) ), flick touch, pinch-in touch, pinch-out touch, swype touch, hovering touch, etc. It can sense touch.

The ultrasonic sensor may recognize location information of a sensing target by using ultrasonic waves. Meanwhile, the controller 180 may calculate the position of the wave source through information sensed by the optical sensor and the plurality of ultrasonic sensors. The position of the wave source may be calculated using the property that light is much faster than ultrasonic waves, that is, the time for light to reach the optical sensor is much faster than the time for ultrasonic waves to reach the ultrasonic sensor. More specifically, the position of the wave source may be calculated using a time difference between the time that the ultrasonic wave arrives using light as the reference signal.

On the other hand, the camera 121 as seen in the configuration of the input unit 120 includes at least one of a camera sensor (eg, CCD, 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 detect a touch of a sensing target for a 3D stereoscopic image. The photo sensor may be stacked on the display device, and the photo sensor is configured to scan the movement of the sensing target close to the touch screen. More specifically, the photo sensor mounts photo diodes and transistors (TRs) in rows/columns and scans the contents placed on the photo sensor using electrical signals that change according to the amount of light applied to the photo diodes. That is, the photo sensor calculates the coordinates of the sensing target according to the amount of change in light, and through this, location information of the sensing target can be obtained.

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 in the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information. .

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

A three-dimensional display method such as a stereoscopic method (glasses method), an auto stereoscopic method (glasses-free method), or a projection method (holographic method) may be applied to the stereoscopic display unit.

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, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output unit 152 also outputs a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100 . The sound output 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 representative example of the tactile effect generated by the haptic module 153 may be vibration. The intensity and pattern of vibration generated by the haptic module 153 may be controlled by a user's selection or setting of the controller. For example, the haptic module 153 may synthesize and output different vibrations or output them sequentially.

In addition to vibration, the haptic module 153 is configured to respond to stimuli such as a pin arrangement that moves vertically with respect to the contact skin surface, a jet force or suction force of air through a nozzle or an inlet, a brush against the skin surface, contact of an electrode, an electrostatic force, etc. Various tactile effects can be generated, such as an effect caused by heat absorption and an effect by reproducing a feeling of cold and heat using an element capable of absorbing or generating heat.

The haptic module 153 may not only deliver a tactile effect through direct contact, but may also be implemented so that the user can feel the tactile effect through a muscle sensation such as a finger or arm. Two or more haptic modules 153 may be provided according to the configuration of the mobile terminal 100 .

The light output unit 154 outputs a signal for notifying the occurrence of an event by using the light of the light source of the mobile terminal 100 . Examples of the event generated in the mobile terminal 100 may be 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 optical output unit 154 is implemented as the mobile terminal emits light of a single color or a plurality of colors toward the front or rear. The signal output may be terminated when the mobile terminal detects the user's event confirmation.

The interface unit 160 serves as a passage with all external devices connected to the mobile terminal 100 . The interface unit 160 receives data from an external device, receives power and transmits it to each component inside the mobile terminal 100 , or transmits data inside the mobile terminal 100 to an external device. For example, a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device equipped with an identification module (port), an audio I/O (Input/Output) port, a video I/O (Input/Output) port, an earphone port, etc. may be included in the interface unit 160 .

On the other hand, the identification module is a chip storing various information for authenticating the usage right of the mobile terminal 100, a user identification module (UIM), a subscriber identity module (subscriber identity module; SIM), universal user authentication It may include a universal subscriber identity module (USIM) and the like. A device equipped with an identification module (hereinafter, 'identification device') may be manufactured in the form of a smart card. Accordingly, the identification device may be connected to the terminal 100 through the interface unit 160 .

In addition, the interface unit 160 is a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or is input from the cradle by a user. It may be a path through which various command signals are transmitted to the mobile terminal 100 . Various command signals or the power input from the cradle may be operated as signals 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 may temporarily store input/output data (eg, a phone book, a message, a still image, a moving image, etc.). The memory 170 may store data related to vibrations and sounds of various patterns output when a touch input on the touch screen is input.

The memory 170 is a flash memory type, a hard disk type, a solid state disk type (SSD), a silicon disk drive type (SDD), and a multimedia card micro type. ), card-type memory (such as SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read (EEPROM) -only memory), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk may include at least one type of storage medium. The mobile terminal 100 may be operated in relation to a web storage that performs a storage function of the memory 170 on the Internet.

Meanwhile, as described above, the controller 180 controls the operation related to the application program and the general operation of the mobile terminal 100 in general. For example, if the state of the mobile terminal satisfies a set condition, the controller 180 may execute or release a lock state that restricts input of a user's control command to applications.

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

The power supply unit 190 receives external power and internal power under the control of the control unit 180 to supply power necessary for the operation of each component. The power supply unit 190 includes a battery, and the battery may be a built-in battery configured to be rechargeable, 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 the interface 160 to which an external charger that supplies 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 uses one or more of an inductive coupling method based on a magnetic induction phenomenon or a resonance coupling method based on an electromagnetic resonance phenomenon from an external wireless power transmitter. power can be transmitted.

Meanwhile, various embodiments below may be implemented in a computer-readable recording medium using, for example, software, hardware, or a combination thereof.

1B and 1C , the disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and may be applied to various structures such as a watch type, a clip type, a glass type, or a folder type in which two or more bodies are coupled to be relatively movable, a flip type, a slide type, a swing type, a swivel type, etc. . Although it will relate to a particular type of mobile terminal, descriptions regarding a particular type of mobile terminal are generally applicable to other types of mobile terminals.

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

The mobile terminal 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an exterior. 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 .

As shown, recently, a mobile terminal having a structure in which the front case is omitted while the window 151a located on the front of the display unit covers the entire front has been released, and has a side case 210 that wraps around the side. You may. The window 151a, the side case 210 and the rear case 102 form an inner space, and in some cases, an electronic component may be mounted on the rear case 102 as well. Electronic components that can be mounted on the rear case 102 include a removable battery, an identification module, a memory card, and the like. In this case, a rear cover for covering the mounted electronic component may be detachably coupled to the rear case 102 . Accordingly, when the rear cover is separated from the rear case 102 , the electronic components mounted on the rear case 102 are exposed to the outside.

These

cases

102 and 210 may be formed by injection of synthetic resin or may be formed of metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The side case 210 of the present invention includes a metal material, and the side case 210 may be used as an antenna radiator. It is necessary to use a conductive material of a length suitable for the frequency characteristics of the signal to be transmitted and received. A plurality of conductive members are formed by dividing the metal side case 210 with a slit 220 in the middle, and the slit 220 is formed of a non-metallic material. The conductive member can be used as an antenna radiator by filling it with a material.

Unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components, the mobile terminal 100 may be configured such that one case provides the internal space. In this case, the mobile terminal 100 of the uni-body in which synthetic resin or metal is connected from the side to the back can be implemented.

Meanwhile, the mobile terminal 100 may include a waterproofing unit (not shown) that prevents water from permeating into the terminal body. For example, the waterproof part 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 combination thereof It may include a waterproof member for sealing the inner space of the city.

The mobile terminal 100 includes 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 , and first and second audio outputs.

Cameras

121a and 121b, first and

second operation units

123a and 123b, a microphone 122, an interface unit 160, and the like may be provided.

Hereinafter, as shown in FIGS. 1B and 1C , the display unit 151, the first sound output unit 152a, the proximity sensor 141, the illuminance sensor 142, and the light output unit ( 154), the first camera 121a and the first operation unit 123a are arranged, the second operation unit 123b, the microphone 122 and the interface unit 160 are arranged on the side of the terminal body, the terminal body The mobile terminal 100 in which the second sound output unit 152b and the second camera 121b are disposed on the rear side of the device will be described as an example.

However, these configurations are not limited to this arrangement. These components may be excluded, replaced, or disposed on different sides as necessary. 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 instead of the rear surface of the terminal body.

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (Flexible Display). display), a three-dimensional display (3D display), and an electronic ink display (e-ink display) may include at least one.

In addition, two or more display units 151 may exist depending on the implementation form of the mobile terminal 100 . In this case, in the mobile terminal 100 , a plurality of display units may be spaced apart from each other or disposed integrally on one surface, or may be respectively disposed on different surfaces.

The display unit 151 may include a touch sensor for sensing a touch on the display unit 151 so as to receive a control command input by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 may generate a control command corresponding to the touch based thereon. The content input by the touch method may be letters or numbers, or menu items that can be instructed or designated in various modes.

On the other hand, the touch sensor is configured in the form of 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 a metal wire patterned directly on the rear surface of the window 151a. may be Alternatively, the touch sensor may be integrally formed with the display. For example, the touch sensor may be disposed on a substrate of the display or provided inside the display.

As such, the display unit 151 may form a touch screen together with the touch sensor, and in this case, the touch screen may function as the user input unit 123 (refer to 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 that transmits a call sound to the user's ear, and the second sound output unit 152b is a loudspeaker that outputs various alarm sounds or multimedia reproduction sounds. ) can be implemented in the form of

A sound hole for emitting sound generated from the first sound output unit 152a may be formed in the window 151a of the display unit 151 . However, the present invention is not limited thereto, and the sound may be configured to be emitted along an assembly gap between structures (eg, a gap between the window 151a and the front case 101). In this case, the appearance of the mobile terminal 100 may be simpler because the holes formed independently for sound output are not visible or hidden.

The light output unit 154 is configured to output light to notify the occurrence of an event. Examples of the event may include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and information reception through an application. When the user's event confirmation is detected, the controller 180 may control the light output unit 154 to end the light output.

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

The first and

second manipulation units

123a and 123b are an example of the user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100, and may be collectively referred to as a manipulating portion. have. The first and

second operation units

123a and 123b may be adopted in any manner as long as they are operated in a tactile manner such as touch, push, scroll, etc. by the user while receiving a tactile feeling. In addition, the first and

second manipulation units

123a and 123b may be operated in a manner in which the user is operated without a tactile feeling through a proximity touch, a hovering touch, or the like.

In this drawing, the first operation unit 123a is illustrated as a touch key, but the present invention is not limited thereto. For example, the first operation unit 123a may be a push key (mechanical key) or may be configured as a combination of a touch key and a push key.

The contents input by the first and

second operation units

123a and 123b may be variously set. For example, the first operation unit 123a receives commands such as menu, home key, cancel, search, etc., and the second operation unit 123b is output from the first or second

sound output units

152a and 152b. It is possible to receive a command such as adjusting the volume of the sound and switching the display unit 151 to the touch recognition mode.

Meanwhile, as another example of the user input unit 123, a rear input unit 123c may be provided on the rear surface of the terminal body. The rear input unit 123c is manipulated to receive a command for controlling the operation of the mobile terminal 100 , and input contents may be variously set. For example, a command such as power on/off, start, end, scroll, etc., control of the sound output from the first and second

sound output units

152a and 152b, and a touch recognition mode of the display unit 151 You can receive commands such as switching of The rear input unit 123c may be implemented in a form capable of input by a touch input, a push input, or a combination thereof.

The rear input unit 123c may be disposed to overlap the front display unit 151 in the thickness direction of the terminal body. As an example, the rear input unit 123c may be disposed on the upper rear portion of the terminal body so that the user can easily manipulate the terminal body using the index finger when holding the terminal body with one hand. However, the present invention is not necessarily limited thereto, and the position of the rear input unit may be changed.

As such, when the rear input unit 123c is provided on the rear surface of the terminal body, a new type of user interface using the same can be implemented. In addition, when the aforementioned touch screen or rear input unit replaces at least some functions of the first operation unit 123a provided on the front surface of the terminal body, the first operation unit 123a is not disposed on the front surface of the terminal body, The display unit 151 may be configured with a larger screen.

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

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

The interface unit 160 serves as a passage through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 is a connection terminal for connection with another device (eg, earphone, external speaker), a port for short-range communication (eg, infrared port (IrDA Port), Bluetooth port (Bluetooth) Port), a wireless LAN port, etc.], or at least one of a power supply terminal for supplying power to the mobile terminal 100 . The interface unit 160 may be implemented in the form of a socket for accommodating an external card such as a Subscriber Identification Module (SIM), a User Identity Module (UIM), or a memory card for information storage.

A second camera 121b may be disposed on the rear side of the terminal body. In this case, the second camera 121b has a photographing direction 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 may be referred to as an 'array camera'. When the second camera 121b is configured as an array camera, an image may be captured in various ways using a plurality of lenses, and an image of better quality may be obtained.

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

A second sound output unit 152b may be additionally disposed on 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 to implement a speakerphone mode during a call.

At least one antenna for wireless communication may be provided in the terminal body. The antenna may be built into the terminal body or formed in the case. For example, an antenna forming a part of the broadcast reception module 111 (refer to FIG. 1A ) may be configured to be withdrawable from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner side of the rear cover 103 , and 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 (refer to FIG. 1A ) for supplying power to the mobile terminal 100 . The power supply unit 190 may include a battery 191 that is built into the terminal body or is detachably configured 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 charged through a wireless charging device. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

On the other hand, in this figure, the rear cover 103 is coupled to the rear case 102 to cover the battery 191 to limit the detachment of the battery 191 and to protect the battery 191 from external shocks and foreign substances. is foreshadowing When the battery 191 is detachably configured to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102 .

An accessory for protecting the appearance of the mobile terminal 100 or supporting or extending a function of the mobile terminal 100 may be added. As an example of such an accessory, there may be a cover or a pouch that covers or accommodates at least one surface of the mobile terminal 100 . The cover or pouch may be configured to extend the function of the mobile terminal 100 by interworking with the display unit 151 . As another example of the accessory, there may be a touch pen for assisting or extending a touch input to a touch screen.

Hereinafter, embodiments related to a control method that can be implemented in the mobile terminal configured as described above will be described with reference to the accompanying drawings. It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

The mobile terminal 200 includes a light irradiating unit 210 for irradiating light toward the photographing area 400 and a light receiving unit 220 for receiving light reflected by the subject 300 among the light irradiated from the light irradiating unit 210 and It may include a processor 230 for controlling the light emitter 210 and the light receiver 220 .

The light irradiation unit 210 may include a plurality of light sources. The plurality of light sources may respectively radiate light toward the plurality of divided regions 410 . In some cases, the plurality of light sources may form a group toward the plurality of divided regions 410 to irradiate light, respectively. Here, the plurality of divided areas 410 may be formed by dividing the photographing area 400 .

The light receiver 220 may receive light reflected from the subject 300 in correspondence to the divided area 410 .

The processor 230 controls the light irradiated from the light irradiator 210 , and a depth corresponding to the divided region 410 through a phase difference between the light received from the light receiver 220 and the light irradiated from the light irradiator 210 . information can be obtained.

3 and 4 are diagrams for explaining a difference in the amount of light reaching the photographing area 400 .

When looking at the photographing area 400 located on the same plane, the plurality of divided areas 410 may have different distances to the light irradiation unit 210 . As the light irradiator 210 deviates from the optical axis for irradiating light among the divided regions 410 constituting the photographing area 400 , the distance from the light irradiator 210 may increase. For example, the distance d1 between the divided area 411 located at the center and the light irradiation unit 210 may be closer than the distance d2 between the divided areas 412 located at the outer side.

Looking at the amount of light reaching the imaging area 400 on the axis (X-axis) perpendicular to the optical axis, the largest amount of light is irradiated to the point (X0) through which the optical axis passes, and the farthest from the point (X0) through which the optical axis passes. It can be seen that the least amount of light is irradiated to the distant points (Xl, Xr). That is, in the area away from the optical axis of the photographing area 400 , the amount of light relative to the incident area may be lower than that of the central area supporting the optical axis.

When the light irradiated from the light irradiator 210 is not uniformly irradiated to the plurality of divided regions 410 , the reliability of the acquired depth information may be reduced. For example, the depth information on the divided area 410 with a small amount of irradiated light may have lower reliability than the depth information on the divided area 410 with a large amount of irradiated light.

5 is a diagram illustrating a light irradiator 210 according to an exemplary embodiment.

The light irradiation unit 210 may include a plurality of light sources. Each of the

light sources

211 and 212 may correspond one-to-one to the divided area 410 of the photographing area 400 . For example, the first light source 210 may radiate light to the first divided region 411 , and the second light source may radiate light to the second divided region 412 .

The plurality of

light sources

211 and 212 may sequentially irradiate light from the photographing area 400 . For example, after the first light source 211 irradiates light to the first divided region 411 , the second light source 212 may radiate light to the second divided region 412 . When the plurality of

light sources

211 and 212 are sequentially turned on, the required maximum peak power may be reduced. By reducing the maximum peak power, the performance and volume of the power supply can be reduced.

The plurality of

light sources

211 and 212 may be independently controlled to adjust the amount of light applied to the respective divided regions 410 . For example, the first light source 211 may apply a relatively small amount of light to the first divided area 411 . Here, the first divided region 411 is relatively close to the light irradiator 210 , so that even though the mobile terminal applies a relatively small amount of light to the first divided region 411 , the depth information of the first divided region 411 is can be obtained sufficiently. The second light source 212 may apply a relatively large amount of light to the second divided area 412 . Here, the second divided region 412 is relatively far from the light irradiator 210 , and the mobile terminal must apply a relatively large amount of light to the second divided region 412 to determine the depth information of the second divided region 412 . can be obtained sufficiently.

FIG. 6 is a view for explaining a method of adjusting the amount of light by using the pulse intensity of a light source, according to an exemplary embodiment. Specifically, FIG. 6(a) is a timing sync signal applied to a light source, FIG. 6(b) may correspond to a pulse irradiated from a first light source, and FIG. 6(c) may correspond to a pulse irradiated from a second light source. .

The mobile terminal controls the pulse intensity of the first light source irradiating light to the first divided area and the second light source irradiating light to the second divided area to adjust the amount of light irradiated to the first divided area and the second divided area. can

Specifically, the mobile terminal can adjust the amount of light applied to the second divided area to be greater than the amount of light applied to the first divided area by making the pulse size h1 of the second light source larger than the pulse size h1 of the first light source. have. In this case, the pulse ratio of the first light source and the pulse ratio of the second light source may be the same.

7 is a view for explaining a method of adjusting the amount of light by using a pulse ratio of a light source, according to an exemplary embodiment. Specifically, FIG. 7(a) is a timing sync signal applied to a light source, FIG. 7(b) may correspond to a pulse irradiated from a first light source, and FIG. 7(c) may correspond to a pulse irradiated from a second light source. .

The mobile terminal controls the pulse ratio of the first light source irradiating light to the first divided area and the second light source irradiating light to the second divided area to adjust the amount of light irradiated to the first divided area and the second divided area. can Here, the pulse ratio may correspond to the ratio of time occupied by one pulse to the time from the start time of one pulse to the start time of the next pulse. Specifically, the pulse ratio of the first light source may have a value of w1/L=r1 as the ratio of the time (w1) occupied by one pulse to the time (L) from the start of one pulse to the start of the next pulse (w1). The pulse ratio of the second light source may have a value of w2/L=r2 as the ratio of the time (w2) occupied by one pulse to the time (L) from the start point of one pulse to the start point of the next pulse.

Specifically, the mobile terminal makes the pulse rate r2 of the second light source larger than the pulse rate r1 of the first light source, so that the amount of light applied to the second divided area can be adjusted to be greater than the amount of light applied to the first divided area. have. In this case, the pulse magnitude of the first light source and the pulse magnitude of the second light source may be the same. Also, the time from the start time of one pulse to the start time of the next pulse may be the same.

8 is a view for explaining a method of adjusting the amount of light using the number of pulses of a light source, according to an exemplary embodiment. Specifically, FIG. 7(a) is a timing sync signal applied to a light source, FIG. 7(b) may correspond to a pulse irradiated from a first light source, and FIG. 7(c) may correspond to a pulse irradiated from a second light source. .

The mobile terminal controls the number of pulses of the first light source irradiating light to the first divided region and the second light source irradiating light to the second divided region to adjust the amount of light irradiated to the first divided region and the first divided region. can Here, the number of pulses may correspond to the number of pulses included in the same time range.

Specifically, the mobile terminal may increase the number of pulses of the second light source than the number of pulses of the first light source for the same time to adjust the amount of light applied to the second divided area to be greater than the amount of light applied to the first divided area.

In order to control the number of pulses, the mobile terminal determines the time (L1) from the start point of one pulse to the start point of the next pulse in the first light source and the time (L2) from the start point of one pulse to the start point of the next pulse in the second light source. ) can be made longer. Alternatively, the pulse may not be generated from the first light source for a preset time.

Specifically, FIG. 9(a) is a timing sync signal as a reference, FIGS. 7(b) to (e) are pulses irradiated from the first to fourth light sources, and FIGS. 7(f) to 7(i) shows the pulses received by the light receiver.

7(b) to 7(e) show an embodiment of a pulse that can be used to adjust the amount of light applied to the divided area, and the light transmitter 210 uses at least one of the first to fourth light sources. may include 7(b) to 7(e) show an embodiment in which pulses are sequentially generated from a plurality of light sources. However, in some cases, at least two light sources may simultaneously generate a pulse.

The pulse irradiated from the first light source (FIG. 7(b)) and the pulse irradiated from the second light source (FIG. 7(c)) are compared as follows. The pulse irradiated from the second light source may have a higher pulse ratio than the pulse irradiated from the first light source. In this case, the light amount of the second divided area to which light is irradiated through the second light source may be higher than that of the first divided area to which light is emitted through the first light source.

The pulse irradiated from the first light source (FIG. 7(b)) and the pulse irradiated from the third light source (FIG. 7(d)) are compared as follows. The pulse irradiated from the third light source may have a larger magnitude than the pulse irradiated from the first light source. In this case, the amount of light of the third divided region to which light is irradiated through the third light source may be higher than that of the first divided region to which light is irradiated through the first light source.

The pulse irradiated from the first light source (FIG. 7(b)) and the pulse irradiated from the fourth light source (FIG. 7(e)) are compared as follows. The number of pulses irradiated from the fourth light source may be smaller than that of the pulses irradiated from the first light source for the same time period. In this case, the amount of light in the fourth divided region to which light is irradiated through the fourth light source may be less than that of the first divided region to which light is irradiated through the first light source.

7(b) to 7(e) illustrate an embodiment in which a phase difference occurs when pulses generated from the first to fourth light sources are reflected by a subject and received by the light receiving unit, respectively. The light receiver may detect the phase change based on the shift degree of the pulse based on the timing sync signal.

10 is a diagram illustrating light irradiation according to an embodiment.

light sources

211 and 212 may correspond to the divided area 410 of the photographing area 400 , respectively. For example, the first light source 211 may radiate light to the first divided region 411 , and the second light source 212 may radiate light to the second divided region 412 . In this case, the light sources irradiating the light of each of the divided

areas

411 and 412 may form a group. For example, a plurality of light sources of the first light source 211 irradiating light to the first divided region 411 are included, and a plurality of second light sources 212 irradiating light to the second load region 412 are plural. It may include several light sources.

The mobile terminal controls the light emission patterns of the plurality of light sources constituting the first light source 211 and the light emission patterns of the plurality of light sources constituting the second light source 212 to be applied to the first divided area and the second divided area. You can adjust the amount of light.

The mobile terminal may adjust the amount of light irradiated to the specific divided area by controlling the number of light emission of a plurality of light sources irradiating light to the specific divided area. Specifically, FIG. 11 shows an embodiment in which one of the light sources 2111 irradiated to the specific divided area is turned on (FIG. 11(a)) or off (FIG. 11(b)) to adjust the amount of light.

In the mobile terminal, a plurality of light sources irradiating light to a specific divided area may be combined into light sources having different outputs. For example, the plurality of light sources irradiating light to a specific divided area may include a light source 2112 having a relatively strong output and a light source 2113 having a relatively weak output. The mobile terminal may adjust the amount of light by controlling a combination in which a plurality of light sources emit light. Specifically, FIG. 12(a) shows an embodiment in which the light quantity applied to a specific divided area is increased by turning on the light source 2112 having a relatively strong output, and FIG. 12(b) is a light source 2112 having a relatively strong output. An embodiment of reducing the amount of light applied to a specific divided area by turning on the light source 2113 having a relatively weak output is illustrated.

The mobile terminal may adjust the amount of light applied to the divided area based on the depth information of the divided area. Specifically, the mobile terminal may apply a relatively small amount of light when the subject is relatively close to the divided area, and apply a relatively large amount of light when the subject is relatively far away from the divided area.

To this end, the mobile terminal may photograph the first frame (S410) and firstly obtain distance information. (S420) In the first frame, distance information may be obtained by irradiating the divided regions with an equal amount of light. In some cases, distance information may be acquired while the amount of light to be applied to the divided area is adjusted.

The mobile terminal may adjust the amount of light to be applied to the divided area based on the distance information obtained through the first frame. Specifically, the light irradiator may be controlled to irradiate a small amount of light when the subject is close to the divided area and irradiate a large amount of light when the subject is far away from the divided area ( S430 ).

The mobile terminal may photograph the second frame in a state in which the amount of light applied to the divided area is adjusted ( S440 ). More accurate and efficient depth information may be obtained through the second frame obtained by the mobile terminal in a state in which the amount of light is adjusted (S450).

The mobile terminal may adjust the amount of light of the next frame through the previous distance information in consecutively photographed frames.

The mobile terminal may adjust the amount of light applied to the divided area based on the motion information of the subject in the divided area. Specifically, a small amount of light may be irradiated to a divided area in which there is no movement of the subject or a small amount of movement, and a large amount of light may be irradiated to a divided area in which there is a movement of the subject or a large amount of movement.

To this end, the mobile terminal may photograph the first frame (S510), successively photograph the second frame (S520), and obtain motion information of the subject based on the obtained distance information (S530).

The mobile terminal may control the light irradiator to irradiate a large amount of light to a divided area in which there is a movement of a subject or a lot of movement and to irradiate a small amount of light to a divided area in which there is no movement or a small movement (S540).

The mobile terminal may photograph the third frame in a state in which the amount of light applied to the divided area is adjusted (S550). More accurate and efficient depth information may be acquired through the second frame acquired by the mobile terminal in a state in which the amount of light is adjusted (S560).

The plurality of

light sources

210 and 220 may sequentially irradiate light from the photographing area 400 . For example, after the first light source 211 irradiates light to the first divided region 411 , the second light source 212 may radiate light to the second divided region 412 . When the plurality of

light sources

The plurality of

light sources

210 and 220 may be independently controlled to adjust the amount of light applied to the respective divided regions 410 . For example, the first light source 211 may apply a relatively small amount of light to the first divided area 411 . Here, the first divided region 411 is relatively close to the light irradiator 210 , so that even though the mobile terminal applies a relatively small amount of light to the first divided region 411 , the depth information of the first divided region 411 is can be obtained sufficiently. The second light source 212 may apply a relatively large amount of light to the second divided area 412 . Here, the second divided region 412 is relatively far from the light irradiator 210 , and the mobile terminal must apply a relatively large amount of light to the second divided region 412 to determine the depth information of the second divided region 412 . can be obtained sufficiently.

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Claims

a light irradiator including a plurality of light sources irradiating light toward the divided area;

a light receiver configured to receive light reflected in response to the divided area; and

A processor connected to the light emitting unit and the light receiving unit to obtain depth information of the divided region through a phase difference between the light irradiated from the light emitting unit and the light received by the light receiving unit;

the processor

and controlling the light irradiator to adjust the amount of light irradiated to each of the divided areas.
According to claim 1,

the processor

Adjusting the amount of light irradiated to the first divided area and the second divided area by using the pulse intensity of the first light source for irradiating light to the first divided area and the second light source for irradiating light to the second divided area Mobile terminal, characterized in that.
According to claim 1,

the processor

Adjusting the amount of light irradiated to the first divided area and the second divided area by using the pulse ratio of the first light source for irradiating light to the first divided area and the second light source for irradiating light to the second divided area Mobile terminal, characterized in that.
According to claim 1,

the processor

Adjusting the amount of light irradiated to the first divided area and the second divided area by using the number of pulses of the first light source for irradiating light to the first divided area and the second light source for irradiating light to the second divided area Mobile terminal, characterized in that.
According to claim 1,

The light irradiation unit

A plurality of first light sources for irradiating light to the first divided region and a plurality of second light sources for irradiating light to the second divided region, respectively;

the processor

The mobile terminal of claim 1, wherein the amount of light irradiated to the first divided area and the second divided area is adjusted through the number of emitted light of the plurality of first light sources and the plurality of second light sources.
According to claim 1,

The light irradiation unit

A plurality of first light sources for irradiating light to the first divided region and a plurality of second light sources for irradiating light to the second divided region, respectively;

A plurality of the first light sources

It includes a 1-1 light source having a relatively strong output and a 1-2 light source having a relatively weak output,

A plurality of the second light sources

It includes a 2-1 light source having a relatively strong output and a 2-2 light source having a relatively weak output,

the processor

The mobile terminal of claim 1, wherein the amount of light irradiated to the first divided area and the first divided area is adjusted through a combination of a plurality of first light sources and a combination of light emission of a plurality of second light sources.
According to claim 1,

the processor

and controlling the amount of light applied to the divided area based on depth information of the divided area.
8. The method of claim 7,

the processor

and applying a relatively small amount of light when the subject is relatively close to the divided area, and applying a relatively large amount of light when the subject is relatively far from the divided area.
8. The method of claim 7,

the processor

Based on the depth information obtained through the Nth frame, the mobile terminal, characterized in that the control of the amount of light applied to the divided area in the N+1th frame.
According to claim 1,

the processor

and controlling the amount of light applied to the divided area based on the motion information of the subject in the divided area.
11. The method of claim 10,

The processor is

and applying a relatively small amount of light when there is no movement of the subject in the divided area, and applying a relatively large amount of light when there is movement of the subject in the divided area.
11. The method of claim 10,

the processor

The mobile terminal of claim 1, wherein the amount of light applied to the divided area in the N+1th frame is controlled based on the motion information of the subject acquired through the Nth frame and the N+1th frame.
According to claim 1,

the processor

and controlling the light irradiator to sequentially irradiate light toward the divided area.