WO2017204498A1

WO2017204498A1 - Mobile terminal

Info

Publication number: WO2017204498A1
Application number: PCT/KR2017/005251
Authority: WO
Inventors: 조아영; 신윤섭; 이창환; 정용우
Original assignee: 엘지전자 주식회사
Priority date: 2016-05-27
Filing date: 2017-05-19
Publication date: 2017-11-30

Abstract

The present invention relates to a mobile terminal comprising a lighting device. The lighting device according to one embodiment of the present invention comprises multiple light-emitting elements and a diffractive optical element (DOE) for diffracting a part of the light which has been output from each of the multiple light-emitting elements, wherein the light, which has been output from the multiple light-emitting elements and has passed through the diffractive optical element, comprises multiple first kinds of light not diffracted by the diffractive optical element and multiple second kinds of light diffracted by the diffractive optical element, and the diffractive optical element diffracts the part of the light output from the multiple light-emitting elements such that at least some of the multiple second kinds of light is radiated into an area formed by connecting the multiple first kinds of light.

Description

Mobile terminal

The present invention relates to a mobile terminal including a lighting device, and more particularly to a mobile terminal having a lighting device used to extract depth information of an image.

Terminals may be divided into mobile / portable terminals and stationary terminals according to their mobility. The mobile terminal may be further classified into a handheld terminal and a vehicle mounted terminal according to whether a user can directly carry it.

The functions of mobile terminals are diversifying. For example, data and voice communication, taking a picture and video with a camera, recording a voice, playing a music file through a speaker system, and outputting an image or video to a display unit. Some terminals have an electronic game play function or a multimedia player function. In particular, recent mobile terminals may receive multicast signals that provide visual content such as broadcasting, video, and television programs.

As the terminal functions are diversified, for example, such a terminal is a multimedia player having a complex function such as taking a picture or a video, playing a music or video file, playing a game, or receiving a broadcast. Is being implemented.

Recently, as the performance of the camera is developed, various functions using the camera have been developed. For example, development of functions for capturing high-quality still images or moving images or generating 3D images using depth information (depth value) of an image received through a camera is being actively performed.

The role of the light emitting device is important for various functions using such a camera. The light emitting device serves to emit light into a space corresponding to the image received through the camera.

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

One object of the present invention is to provide a mobile terminal including an illumination device that can irradiate light used to extract depth information of an image taken by a camera in an optimized method.

Another object of the present invention is to provide a mobile terminal including an illumination device formed so that more light spots than the number of light sources are irradiated to the subject in an optimized form.

It is another object of the present invention to provide a mobile terminal including an illumination device capable of diffracting light emitted from a light source so that the number of light spots per unit area increases.

An illumination device included in a mobile terminal according to an embodiment of the present invention includes a plurality of light emitting elements and a diffractive optical element (DOE) for diffracting a part of the light output from each of the plurality of light emitting elements, The light outputted from the device and transmitted through the diffractive optical element includes a plurality of first kinds of light that is not diffracted by the diffractive optical element and a plurality of second kinds of light diffracted by the diffractive optical element, The diffractive optical element diffractes a portion of the light output from the plurality of light emitting elements such that at least a portion of the plurality of second types of light is irradiated into a region connecting the plurality of first types of light. do.

In some embodiments, when the plurality of first types of light and the plurality of second types of light are irradiated onto a plane spaced apart from the lighting apparatus by a predetermined distance, at least some of the plurality of second types of light may be provided. It is characterized in that the irradiated inside the area connecting the plurality of first types of light irradiated.

In an embodiment, a distance between any one of the plurality of first types of light irradiated onto the plane and a second type of light associated with the one of the plurality of light beams may be the plurality of first portions irradiated onto the plane. It is characterized in that it is within three times the minimum distance between kinds of lights.

In example embodiments, the plurality of light emitting devices may be disposed to form a predetermined pattern, and the plurality of first types of light and the plurality of second types of light may be irradiated to form the patterns, respectively. .

In an embodiment, a portion of the first region occupied by the pattern formed by the plurality of first kinds of light and a portion of the second region occupied by the pattern formed by the plurality of second kinds of light overlap each other. It is characterized by.

In example embodiments, the diffractive optical device may divide light output from the light emitting device into a plurality of light emitting devices to form a predetermined pattern.

In an exemplary embodiment, the number of the plurality of first types of light may be the same as the number of the plurality of light emitting devices.

In an exemplary embodiment, as the number of the plurality of second types of light diffracted by the diffractive optical element increases, the density of the first and second types of light increases.

A mobile terminal according to an embodiment of the present invention includes a lighting device described herein.

According to the present invention, the present invention can diffract (or divide) the light output from the light source into a plurality of light by using the diffractive optical element, so that the number of light spots larger than the number of light sources is reduced to the subject with a small number of light sources. It is possible to provide a lighting device that can be irradiated and a mobile terminal including the same.

As a result, the present invention only needs to have a small number of light sources, thereby achieving cost reduction and miniaturization of the terminal size.

Further, according to the present invention, the present invention is not a method of duplicating (or dividing) a light source in a pattern unit formed by a plurality of light sources, but by duplicating (or dividing) light sources for each light source, so that the number of light spots per unit area, that is, light It is possible to provide a new lighting device that can increase the density of spots.

1A is a block diagram illustrating a mobile terminal related to the present invention.

1B and 1C are conceptual views of one example of a mobile terminal, viewed from different directions.

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

3 is a conceptual diagram illustrating a conventional lighting technique.

4 is a conceptual view illustrating a lighting device provided in a mobile terminal according to an embodiment of the present invention.

5, 6, 7 and 8 is a conceptual diagram for explaining the lighting technology using the lighting apparatus of the present invention.

Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, the accompanying drawings are intended to facilitate understanding of the embodiments disclosed herein, but are not limited to the technical spirit disclosed herein by the accompanying drawings, all changes included in the spirit and scope of the present invention. It should be understood to include equivalents and substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The 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 may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

The mobile terminal described herein includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant, a portable multimedia player, a navigation, a slate PC , Tablet PCs, ultrabooks, wearable devices, such as smartwatches, glass glasses, head mounted displays, and the like. have.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein may also be applied to fixed terminals such as digital TVs, desktop computers, digital signages, etc., except when applicable only to mobile terminals. will be.

1A to 1C, FIG. 1A is a block diagram illustrating a mobile terminal according to the present invention, and FIGS. 1B and 1C are conceptual views of one example of the mobile terminal, 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 controller 180, and a power supply unit 190. ) May be included. The components shown in FIG. 1A are not essential to implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than those listed above.

More specifically, the wireless communication unit 110 of the components, 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 and the external server It may include one or more modules that enable wireless communication therebetween. 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 the broadcast receiving module 111, the mobile communication module 112, the wireless internet module 113, the short range communication module 114, and the location information module 115. .

The input unit 120 may include a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, an audio input unit, or a user input unit 123 for receiving information from a user. , Touch keys, mechanical keys, and the like. The voice data or the image data collected by the input unit 120 may be analyzed and processed as a control command of the user.

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. G-sensor, Gyroscope Sensor, Motion Sensor, RGB Sensor, Infrared Sensor, Infrared Sensor, Finger Scan Sensor, Ultrasonic Sensor Optical sensors (e.g. cameras 121), microphones (see 122), battery gauges, environmental sensors (e.g. barometers, hygrometers, thermometers, radiation detection sensors, Thermal sensors, gas sensors, etc.), chemical sensors (eg, electronic noses, healthcare sensors, biometric sensors, etc.). Meanwhile, the mobile terminal disclosed herein may use a combination of information sensed by at least two or more of these sensors.

The output unit 150 is for generating an output related to sight, hearing, or tactile sense, and includes at least one of the display unit 151, the audio output unit 152, the hap tip module 153, and the light output unit 154. can do. The display unit 151 forms a layer structure with or is integrally formed with the touch sensor, thereby implementing 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 the user, and may also provide an output interface between the mobile terminal 100 and the 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 connects a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, and 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 the mobile terminal 100, in response to an external device being connected to the interface unit 160, appropriate control associated with the connected external device may be performed.

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 operating the mobile terminal 100, and instructions. At least some of these applications may be downloaded from an external server via 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 of the mobile terminal 100 (for example, a call forwarding, a calling function, a message receiving, and a calling function). The application program may be stored in the memory 170 and installed on the mobile terminal 100 to be driven by the controller 180 to perform an operation (or function) of the mobile terminal.

In addition to the operation related to the application program, the controller 180 typically controls the overall operation of the mobile terminal 100. The controller 180 may provide or process information or a function appropriate to a user by processing signals, data, information, and the like, which are 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 described with reference to FIG. 1A in order to drive an application program stored in the memory 170. Furthermore, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 to drive the application program.

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

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

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

The mobile communication module 112 may include technical standards or communication schemes (eg, Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (CDMA2000), and EV). Enhanced Voice-Data Optimized or Enhanced Voice-Data Only (DO), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), LTE-A (Long Term Evolution-Advanced) and the like to transmit and receive a radio signal with at least one of a base station, an external terminal, a server on a mobile communication network.

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

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

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

In view of the fact that the 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 for performing a wireless Internet access through the mobile communication network 113 ) May be understood as a kind of 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), ZigBee, and NFC. (Near Field Communication), at least one of Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus) technology can be used to support short-range communication. The short-range communication module 114 may be configured between a mobile terminal 100 and a wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or through the wireless area networks. ) And a network in which the other mobile terminal 100 (or an external server) is located. The short range wireless communication network may be short range wireless personal area networks.

Here, the other mobile terminal 100 is a wearable device capable of exchanging (or interworking) data with the mobile terminal 100 according to the present invention (for example, smartwatch, smart glasses). (smart glass), head mounted display (HMD). The short range communication module 114 may sense (or recognize) a wearable device that can communicate with the mobile terminal 100, around the mobile terminal 100. Further, when the detected wearable device is a device that is authenticated to communicate with the mobile terminal 100 according to the present invention, the controller 180 may include at least a portion of data processed by the mobile terminal 100 in the short range communication module ( The transmission may be transmitted to the wearable device through 114. Therefore, 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 by the mobile terminal 100, the user performs a phone call through the wearable device or when a message is received by the mobile terminal 100, the received through the wearable device. It is possible to check the message.

The location information module 115 is a module for obtaining a location (or current location) of a 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, the mobile terminal may acquire the location of the mobile terminal using a signal transmitted from a GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, the mobile terminal may acquire the location of the mobile terminal based on information of the wireless access point (AP) transmitting or receiving the Wi-Fi module and the wireless signal. If necessary, the location information module 115 may perform any function of other modules of the wireless communication unit 110 to substitute or additionally obtain data regarding the location of the mobile terminal. 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 input of image information, the mobile terminal 100 is one. Alternatively, the 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 call mode or the 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 camera 121 forming a matrix structure in this way, the mobile terminal 100 may have various angles or focuses. The plurality of pieces of image information may 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 implementing a stereoscopic image.

The microphone 122 processes external sound signals into electrical voice data. The processed voice data may be variously used according to a function (or an application program being executed) performed by the mobile terminal 100. Meanwhile, various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in the process of receiving an external sound signal.

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 an operation of the mobile terminal 100 to correspond to the input information. . The user input unit 123 may be a mechanical input unit (or a mechanical key, for example, a button, a dome switch, a jog wheel, or the like located at the front or rear or side of the mobile terminal 100). Jog switch, etc.) and touch input means. As an example, the touch input means may include a virtual key, a soft key, or a visual key displayed on the touch screen through a software process, or a portion other than the touch screen. It may be made of a touch key disposed in the. The virtual key or the visual key may be displayed on the touch screen while having various forms, for example, graphic, text, icon, video, or the like. It can be made of 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 driving or operation of the mobile terminal 100 or perform data processing, function or operation 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 present in the vicinity without using a mechanical contact by using an electromagnetic force 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 near the touch screen.

Examples of the proximity sensor 141 include a transmissive photoelectric sensor, a direct reflective photoelectric sensor, a mirror reflective photoelectric sensor, a high frequency oscillating proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. In the case where the touch screen is capacitive, the proximity sensor 141 may be configured to detect the proximity of the object by the change of the electric field according to the proximity of the conductive 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 explanation, an action of allowing the object to be recognized without being in contact with the touch screen so that the object is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching an object on a screen is called a "contact touch." The position at which the object is in close proximity touch on the touch screen means a position where the object is perpendicular to the touch screen when the object is in close proximity touch. The proximity sensor 141 may detect a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, and a proximity touch movement state). have. Meanwhile, the controller 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern detected 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. Further, the controller 180 may control the mobile terminal 100 to process different operations or data (or information) according to whether the touch on 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) 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. do.

As an example, the touch sensor may be configured to convert a change in pressure applied to a specific portion of the touch screen or capacitance generated at the specific portion into an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the touch, a capacitance at the touch, and the like, when the touch object applying the touch on the touch screen is touched on the touch sensor. Here, the touch object is an object applying 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, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and then transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched. Here, the touch controller may be a separate component from the controller 180 or may be the controller 180 itself.

Meanwhile, the controller 180 may perform different control or perform the same control according to the type of 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 touch object may be determined according to the operation state of the mobile terminal 100 or an application program being executed.

Meanwhile, the touch sensor and the proximity sensor described above may be independently or combined, and may be a short (or tap) touch, a long touch, a multi touch, a drag touch on a touch screen. ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, etc. A touch can be sensed.

The ultrasonic sensor may recognize location information of a sensing object using ultrasonic waves. On the other hand, the controller 180 can calculate the position of the wave generation source through the information detected from the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated using the property that the light is much faster than the ultrasonic wave, that is, the time that the light reaches the optical sensor is much faster than the time when the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generation source may be calculated using a time difference from the time when the ultrasonic wave reaches the light as the reference signal.

On the other hand, the camera 121, which has been described as the configuration of the input unit 120, includes at least one of a camera sensor (eg, CCD, CMOS, etc.), a photo sensor (or 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 object with respect to a 3D stereoscopic image. The photo sensor may be stacked on the display element, which is configured to scan the movement of the sensing object in proximity to the touch screen. More specifically, the photo sensor mounts a photo diode and a transistor (TR) in a row / column and scans contents mounted on the photo sensor by using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor calculates coordinates of the sensing object according to the amount of light change, and thus, the position information of the sensing object 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 user interface (UI) and graphical user interface (GUI) 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.

The stereoscopic display unit may be a three-dimensional display method such as a stereoscopic method (glasses method), an auto stereoscopic method (glasses-free method), a projection method (holographic method).

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 may also output a sound signal related to a function (for example, a call signal reception sound or a message reception sound) 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 haptic effects that a 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 the user's selection or the setting of the controller. For example, the haptic module 153 may synthesize different vibrations and output or sequentially output them.

In addition to vibration, the haptic module 153 may be used to stimulate pins that vertically move with respect to the contact skin surface, jetting force or suction force of air through the jetting or suction port, grazing to the skin surface, contact of electrodes, and electrostatic force Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endothermic heat generation.

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

The light output unit 154 outputs a signal for notifying occurrence of an event by using light of a light source of the mobile terminal 100. Examples of events occurring 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 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 the rear. The signal output may be terminated by the mobile terminal detecting the user's event confirmation.

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

On the other hand, the identification module is a chip that stores a variety of information for authenticating the usage rights of the mobile terminal 100, a user identification module (UIM), subscriber identity module (SIM), universal user authentication And a universal subscriber identity module (USIM). A device equipped with an identification module (hereinafter referred to as an 'identification device') may be manufactured in the form of a smart card. Therefore, the identification device may be connected to the terminal 100 through the interface unit 160.

In addition, when the mobile terminal 100 is connected to an external cradle, the interface unit 160 may be a passage for supplying power from the cradle to the mobile terminal 100 or may be input from the cradle by a user. Various command signals may be a passage through which the mobile terminal 100 is transmitted. Various command signals or power input from the cradle may operate 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 (for example, a phone book, a message, a still image, a video, etc.). The memory 170 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

The memory 170 may include a flash memory type, a hard disk type, a solid state disk type, an SSD type, a silicon disk drive type, and 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 It may include at least one type of storage medium of -only memory (PROM), programmable read-only memory (PROM), magnetic memory, magnetic disk and optical disk. The mobile terminal 100 may be operated in connection with a web storage that performs a storage function of the memory 170 on the Internet.

On the other hand, as described above, the controller 180 controls the operation related to the application program, and generally the overall operation of the mobile terminal 100. 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 may perform control and processing related to voice call, data communication, video call, or the like, or may perform pattern recognition processing for recognizing handwriting input or drawing input performed on a touch screen as text and images, respectively. Can be. Furthermore, the controller 180 may control any one or a plurality of components described above in order to implement various embodiments described below on the mobile terminal 100 according to the present invention.

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

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

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 based on a magnetic induction phenomenon or a magnetic resonance coupling based on an electromagnetic resonance phenomenon from an external wireless power transmitter. Power can be delivered.

Meanwhile, various embodiments of the present disclosure may be implemented in a recording medium readable by a computer or a similar device using, for example, software, hardware, or a combination thereof.

1B and 1C, the disclosed mobile terminal 100 includes a terminal body in the form of a bar. However, the present invention is not limited thereto, and the present invention can be applied to various structures such as a watch type, a clip type, a glass type, or a folder type, a flip type, a slide type, a swing type, a swivel type, and two or more bodies which are coupled to be movable relative. . Although related to a particular type of mobile terminal, a description of a particular type of mobile terminal may generally apply to other types of mobile terminals.

Herein, the terminal body may be understood as a concept that refers 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 external 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 internal 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.

The display unit 151 may be disposed in front of the terminal body to output information. As shown, the window 151a of the display unit 151 may be mounted to the front case 101 to form a front surface of the terminal body together with the front case 101.

In some cases, an electronic component may be mounted on the rear case 102. Electronic components attachable to the rear case 102 include a removable battery, an identification module, a memory card, and the like. In this case, the rear cover 102 may be detachably coupled to the rear case 102 to cover the mounted electronic component. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic components 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 portion of the side surface of the rear case 102 may be exposed. In some cases, the coupling serial case 102 may be completely covered by the rear cover 103. On the other hand, the rear cover 103 may be provided with an opening for exposing the camera 121b or the sound output unit 152b to the outside.

The

cases

101, 102, and 103 may be formed by injecting a synthetic resin, or may be formed of a metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case may provide 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, the mobile terminal 100 of the unibody that the synthetic resin or metal from the side to the rear may be implemented.

On the other hand, the mobile terminal 100 may be provided with a waterproof portion (not shown) to prevent water from seeping 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 combination thereof. It may include a waterproof member for sealing the inner space.

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, an optical output unit 154, and first and second units. The

cameras

121a and 121b, the first and

second manipulation units

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

Hereinafter, as illustrated 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 may be disposed on the front surface of the terminal body. 154, the first camera 121a and the first operation unit 123a are disposed, and the second operation unit 123b, the microphone 122, and the interface unit 160 are disposed on the side of 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 surface of the mobile terminal 100 will be described as an example.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed or disposed on other sides. For example, the first manipulation 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 of the terminal body instead of the rear surface of the terminal body.

The display unit 151 may include 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 3D display, or an e-ink display.

In addition, two or more display units 151 may exist according to an implementation form of the mobile terminal 100. In this case, the plurality of display units may be spaced apart or integrally disposed on one surface of the mobile terminal 100, or may be disposed on different surfaces.

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

Meanwhile, the touch sensor is formed of a film having a touch pattern and disposed between the window 151a and the display (not shown) on the rear surface of the window 151a or directly patterned 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 in the display.

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

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to the user's ear, and the second sound output unit 152b may be a loud speaker for outputting various alarm sounds or multimedia reproduction sounds. It 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 the structures (for example, a gap between the window 151a and the front case 101). In this case, an externally formed hole may be invisible or hidden for sound output, thereby simplifying the appearance of the mobile terminal 100.

The light output unit 154 is configured to output light for notifying when an event occurs. Examples of the event may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like. 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 the 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 may be collectively referred to as a manipulating portion as an example of the user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100. have. The first and

second manipulation units

123a and 123b may be adopted in any manner as long as the user is tactile manner such as touch, push, scroll, and the like while the user is tactile. In addition, the first and

second manipulation units

123a and 123b may be employed in such a manner that the first and

second manipulation units

123a and 123b are operated without a tactile feeling by the user through proximity touch, hovering touch, or the like.

In the drawing, the first operation unit 123a is illustrated as being 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 push key.

The contents input by the first and

second manipulation units

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

sound output units

152a and 152b. The user may receive a command such as adjusting the volume of the sound and switching to the touch recognition mode of the display unit 151.

Meanwhile, as another example of the user input unit 123, a rear input unit (not shown) may be provided on the rear surface of the terminal body. The rear input unit is manipulated to receive a command for controlling the operation of the mobile terminal 100, and the input contents may be variously set. For example, commands such as power on / off, start, end, scroll, etc., control of the volume of sound output from the first and second

sound output units

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

The rear input unit may be disposed to overlap 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 so that the user can easily manipulate the index body when the user grips 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 is provided at the rear of the terminal body, a new type user interface using the same may be implemented. In addition, when the touch screen or the rear input unit described above replaces at least some functions of the first operation unit 123a provided in the front of the terminal body, the first operation unit 123a is not disposed on the front 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 embedded 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 path for connecting the mobile terminal 100 to an external device. For example, the interface unit 160 may be connected to another device (eg, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), or a Bluetooth port (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 in the form of a socket for receiving an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for storing information.

The second camera 121b may be disposed on the rear surface 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 format. Such a camera may be referred to as an 'array camera'. When the second camera 121b is configured as an array camera, images may be photographed in various ways using a plurality of lenses, and images of better quality may 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.

The 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.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be built in the terminal body or formed in the case. For example, an antenna that forms part of the broadcast receiving module 111 (refer to FIG. 1A) may be configured to be pulled out 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, or may be configured such that a case including a conductive material functions 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 embedded in the terminal body or 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 enable wireless charging through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

Meanwhile, in the drawing, 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 shock and foreign matter. To illustrate. 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 may be added to the mobile terminal 100 to protect the appearance or to assist or expand the function of the mobile terminal 100. An example of such an accessory may be a cover or 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 in conjunction with the display unit 151. Another example of the accessory may be a touch pen for assisting or extending a touch input to a touch screen.

Meanwhile, the mobile terminal according to the present invention may extract (detect, determine, determine, sense) depth information from an image captured by the camera using a camera and an illumination device.

In addition, the mobile terminal according to the present invention may capture (or generate) a 3D image using a camera and an illumination device. For example, the mobile terminal according to the present invention may convert (or generate) a 2D image photographed through a camera to a 3D 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 illumination device, and capture (or generate) a 3D 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 device will be described in detail with reference to the accompanying drawings. In the following description, the contents of extracting the depth information from the image photographed by the camera will be mainly described. However, the contents related thereto may be analogously applied similarly to photographing (or generating) a 3D image.

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

The image received through the camera may be called a preview image. In detail, the preview image refers to an image received through a camera in real time. The preview image may be changed based on the movement of the mobile terminal equipped with the camera 121 by an external force or the movement of the subject.

The image photographed by the camera may mean, for example, an image obtained by photographing a preview image. For example, the image may include a touch of a photographing button output to a display unit of a mobile terminal, a user gesture associated with capturing a preview image is detected through the preview image, or a physical button provided in the mobile terminal is pressed. Can be taken based on the like.

The image described herein may mean at least one of a preview image or a captured image.

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

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

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

This depth information can be used in various fields. For example, the depth information may be used to photograph / create 3D stereoscopic images, to generate 3D printing data used in a 3D printer, or to determine an object (subject) around a mobile terminal. It can be used to detect movement.

The mobile terminal related to the present invention may extract depth information of an image received (or photographed) through a camera in various ways. For example, the controller 180 (refer to FIG. 1A) may use the stereo vision method of extracting depth information using at least two cameras and the depth information using a light emitting device arranged to form a predetermined pattern. Depth information is extracted using a structured light method and a time of flight (ToF) method that extracts depth information based on the time when light emitted from the light emitting device is reflected and returned. can do.

Hereinafter, focusing on extracting depth information using the structured light method among the above-described methods will be described.

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

More specifically, in the structured light method, a plurality of light emitting elements arranged to have a predetermined pattern irradiate light onto a subject and shift the reflected light (or the reflected light pattern) based on the predetermined pattern. The depth information is calculated by calculating the shift amount of.

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

In this case, the controller 180 may extract depth information of an image received through the camera 121 based on the detection result. For example, the controller 180 may extract depth information of an image received through the camera 121 by comparing the preset pattern with a pattern formed by reflected light.

In detail, the controller 180 is configured to emit light from a plurality of light emitting devices to a subject (or a predetermined pattern in which a plurality of light emitting devices are arranged) and light that is reflected back (or a light spot). Comparing the patterns formed by the plurality of patterns, and shift amounts (or deformed shapes, deformed distances, and deformed directions) with respect to each of the reflected light (or light spots) based on the predetermined pattern. Or the like) or the depth information of the image received through the camera 121 may be extracted by calculating a movement amount of the returned light pattern.

As another example, in the structured light method, the controller 180 extracts depth information of an image received through the camera 121 by comparing the time / intensity of the light emitted from the plurality of light emitting devices and returning the reflected light. 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 preset pattern may be determined (set) by the user or may be predetermined when producing a product of the mobile terminal. In addition, the preset pattern may be changed by a user's request or a control of a controller.

In addition, the plurality of light emitting devices may emit infrared light. The light emitting device may be a laser diode that converts an electrical signal into an optical signal. For example, the light emitting device may be a vertical cavity surface emitting laser (VCSEL).

In the present invention, by using the structured light method, 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 may be extracted. In addition, by combining the structured light method and the stereo vision method using at least two cameras, or by combining the structured light method and the ToF method, it is possible to improve the accuracy of the depth information.

The time of flight (ToF) method may be a method of measuring depth information of an image by directly irradiating light to an object and calculating a time of reflected light to return.

In the stereo vision method, a plurality of cameras (for example, two cameras) are disposed symmetrically, and an image received through a first camera (for example, a left camera) of the plurality of cameras and a second of the plurality of cameras are symmetrically arranged. It may be a method of extracting depth information of an image received through the camera by using a disparity (or distance difference or interval) generated from the left and right parallax of the image received through the camera (for example, the right camera). have.

The mobile terminal according to the present invention may use a combination of a stereo vision system and a structured light system.

As shown in (a) of FIG. 2, in the mobile terminal according to the present invention, a plurality of

cameras

121b and 121c may be provided together on one surface of the mobile terminal. In this case, 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 body.

In FIG. 2A, the plurality of

cameras

121b and 121c are provided on the rear surface of the main body of the mobile terminal.

In addition, the lighting device 200 of the present invention may be provided together on one surface provided with the plurality of

cameras

121b and 121c.

The lighting device 200 may include a plurality of light emitting devices, and as described above, may emit light having a predetermined pattern to extract depth information of an image through a structured light method. The plurality of light emitting devices (or a plurality of light sources) may be, for example, a big cell VCSEL.

As shown in (a) of FIG. 2, the mobile terminal of the present invention uses a stereo vision method using a plurality of

cameras

121a and 121b and an illumination device 200 capable of irradiating light of a predetermined pattern. Depth information of an image received through a camera may be extracted by combining the structured light method.

The mobile terminal 100 of the present invention is not limited thereto, and any one or at least two of the stereo vision method, the structured light method, and the ToF method may be used even if the plurality of

cameras

121a and 121b are provided on one surface of the main body of the mobile terminal. Depth information of an image received through a camera may be extracted by combining two methods.

Not limited to this, as shown in FIG. 2B, the mobile terminal 100 of the present invention uses only a structured light method using one camera 121 and a lighting device 200, Depth information of an image received through a camera may be extracted by using only the ToF method or by combining the structured light method and the ToF method.

Meanwhile, the lighting device 200 provided 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 device 200 may include a plurality of light emitting devices. Here, the light emitting device may be the VCSEL described above.

The plurality of light emitting devices may be formed to have a predetermined pattern, or only at least some light emitting devices may be turned on to irradiate light with a predetermined pattern.

For example, the plurality of light emitting devices (or a die provided with the plurality of light emitting devices) may be referred to as a big cell array (VCSELs array).

The controller 180 of the mobile terminal according to the present invention may individually control a plurality of light emitting elements (a plurality of light sources) included in the lighting device 200. In detail, the controller 180 may individually turn on / off a plurality of light emitting devices provided in the lighting apparatus 200. In addition, the controller 180 may individually control the light emission intensities of the plurality of light emitting devices provided in the lighting apparatus 200. In addition, the controller 180 may individually control (determine) the light emission time points of the plurality of light emitting devices provided in the lighting apparatus 200.

The lighting device 200 may be individually turned on or off, the light emission intensity may be changed, or the light emission time may be changed by the control of the controller 180. Accordingly, the pattern of the light irradiated from the lighting device 200 (that is, the predetermined pattern) may vary.

As described above, the lighting apparatus 200 included in the mobile terminal of the present invention may vary the pattern of light (or the intensity of light and the viewpoint of light) irradiated by individually controlling a plurality of light emitting elements (a plurality of VCSELs). In this respect, it may be referred to as active lighting.

Meanwhile, the lighting apparatus 200 according to the present invention may irradiate a light (or light spot) having a predetermined pattern on a subject to be used to extract depth information of an image. Here, the light spot is an area (or point) to which light is irradiated to a subject or an area (or point) to which light is irradiated to a mobile terminal (or a lighting device 200 or a camera or a sensing unit) reflected from the subject. It may mean.

In the present invention, since the plurality of light emitting elements included in the lighting apparatus 200 are laser diodes (for example, VCSELs), when the light is irradiated from the plurality of light emitting elements, the light is emitted to the local area (or point) of the subject. (Laser) is irradiated. Accordingly, a light spot may be formed on the subject. In addition, the present invention can detect (detect) the light spot irradiated on the subject based on the return of light (laser) reflected from the subject back to the mobile terminal.

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

The diffractive optical element may diffract one light output from the light emitting element into a plurality of light. As used herein, diffraction of light (light, laser) may be understood to mean splitting light, replicating light, dividing light, refracting a portion of the light, and the like. When one light output from the light emitting device is diffracted (divided) into a plurality of light by the diffraction optical device, 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 (ie, 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 lighting apparatus of the present invention can output more light (light spots) than the number of light emitting devices by using the diffractive optical device.

For example, when the number of the plurality of light emitting elements is n and the number of light (light spots) output when one light passes through the diffractive optical element is m, the lighting apparatus 200 of the present invention is n * m lights (light spots) can be output (or irradiated to the subject).

The lighting apparatus 200 of the present invention includes a plurality of light emitting elements and a diffraction optical element, and the diffraction optical element is configured to receive 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 lighting apparatus 200 of the present invention may include a diffraction optical element that diffracts light so as to have the predetermined pattern for each light source. In other words, the diffraction optical element included in the lighting apparatus 200 of the present invention may diffract (pass) the light so that one light output from one light emitting element forms a predetermined pattern. Accordingly, the plurality of lights output from the plurality of light emitting devices may be diffracted to form the predetermined pattern individually and may pass through the diffractive optical device.

On the other hand, the conventional lighting apparatus (or conventional diffractive optical element) is formed so as to diffract and output the light outputted from the plurality of light emitting elements so that there are a plurality of patterns formed by the plurality of light emitting elements.

A conventional lighting technique will be described in more detail with reference to FIG. 3.

3 is a conceptual diagram illustrating a conventional lighting technique.

In FIG. 3, for convenience of description, an embodiment in which light (or light pattern) incident on the diffractive optical element is replicated by 3 by 3 will be described.

Referring to FIG. 3, the light source unit 300 of the conventional lighting apparatus may include a plurality of light emitting

devices

300a, 300b, 300c, 300d, and 300e. In the light source unit 300, a plurality of light emitting

devices

300a, 300b, 300c, 300d, and 300e may be disposed to form a specific pattern, and a light emitting device of a portion of the plurality of light emitting devices to form the specific pattern may be formed. Only 300a, 300b, 300c, 300d, and 300e may be turned on.

At this time, when the plurality of light output from the plurality of light emitting elements passes through the diffractive optical element, the first type of light 310 that is undiffracted by the diffractive optical element and the first diffracted by the diffractive optical element It can be divided into two kinds of light 320a, 320b, 320c, 320d, 320e, 320f, 320g, 320h.

When either light is irradiated to the diffractive optical element, a portion of the light may pass through the diffractive optical element without being diffracted (or unfragmented, or refracted) by the diffractive optical element. In other words, a portion of the light may pass through the diffractive optical element without being diffracted or refracted by the diffractive optical element and maintaining straightness (or straight).

As such, in the present specification, the light in which a part of the light is not diffracted will be referred to as the first kind of light. In this case, the first type of light may mean zero-order light. Referring to FIG. 3, the number of first types of light 310 may be the same as the number of light emitting

devices

300a, 300b, 300c, 300d, and 300e, for example.

On the other hand, when any one of the light is irradiated to the diffractive optical element, the remaining portion except for a portion 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, that is, different directions. As described above, in the present specification, light in which the remaining portion of the light is diffracted (refractive) will be referred to as a second type of light. In this case, the second type of light may mean primary light.

Referring to FIG. 3, the number of the plurality of second types of

lights

320a, 320b, 320c, 320d, 320e, 320f, 320g, and 320h diffracted by the diffractive optical element will vary depending on the design of the diffractive optical element. In general, the number may be greater than the number of light emitting devices.

Here, the case where the first kind of light is zero order light and the second kind of light is primary light may be an example of passing through one diffractive optical element. For example, as shown in FIG. 3, when light output from a plurality of light emitting elements passes through only one diffractive optical element, the light passing through is the first type of light (zero-order light) and the second type of light. (Primary light) may be included.

On the other hand, when passing through at least two diffractive optical elements, the light of the first kind and the light of the second kind may include light of different orders.

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

Then, when the zero-order light and the first-order light pass through the second diffraction optical element, the light passing through the second diffraction optical element is the zero-order light and the first-order light that are undiffracted by the second diffraction optical element, and the diffracted 1 It may include shading and secondary shading. In this case, the diffracted primary light may be light diffracted by the zeroth light, and the diffracted secondary light may be light diffracted by the primary light.

In this case, the first kind of light may include the zero-order light and the first-order light, which are passed through the first diffraction optical element and are undiffracted by the second diffraction optical element. In addition, the second type of light may include primary light and secondary light that have passed through the first diffractive optical element and are diffracted by the second diffractive optical element.

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

In addition, the second kind of light may refer to light diffracted by the last diffractive optical element.

That is, the first kind of light may include light that is not diffracted by the diffractive optical element that is finally passed among the plurality of lights irradiated onto the subject. In addition, the second type of light may include light diffracted by a diffractive optical element that is finally passed among the plurality of lights irradiated onto the subject.

In the conventional case, as shown in FIG. 3, the lighting apparatus (or diffractive optical element) may replicate the light pattern in the pattern unit formed by the plurality of light emitting elements. Specifically, the conventional lighting apparatus may be formed to diffract (replicate) the light patterns emitted from the plurality of light emitting elements by the diffractive optical element so as not to overlap in the pattern unit.

To this end, the conventional lighting apparatus has a pattern in which an angle between a first type of light (for example, zero-order light) and a second type of light (for example, primary light) is formed by the first type of light. And a diffraction optical element formed such that the pattern formed by the second type of light does not overlap.

Accordingly, the pattern formed by the plurality of light emitting elements, the pattern formed by the first type of light 310 and the pattern formed by each of the second type of light 320a, 320b, ..., 320h are illustrated in FIG. 3. It may be the same as shown in.

In addition, the conventional lighting apparatus irradiates light so that the pattern formed by the first type of light 310 and the pattern formed by each of the second type of light 320a, 320b, ..., 320h do not overlap each other. Can be.

In other words, the conventional lighting apparatus includes a region to which the first kind of light 310 is irradiated (or a region connecting points where the first kind of light is irradiated) and a second kind of light 320a, 320b,. And a diffractive optical element for irradiating light so that the regions irradiated with each of 320h (or regions connecting the points where the second type of light is irradiated) do not overlap each other.

That is, in the conventional lighting device by simply copying a plurality of light emitting elements from a plurality of light emitting elements in a pattern unit so as not to overlap each other, and irradiating a plurality of light spots more than the number of light emitting elements. It can only serve to extend the field of view (FOV) being investigated.

Accordingly, in the conventional lighting apparatus, since the first type of light and the second type of light are irradiated onto the subject so as not to overlap each other, increasing the number of light (light spots) irradiated per unit area (that is, light (light (light)). Increasing the density of the spot) is impossible.

In other words, the conventional lighting apparatus, as shown in Figure 3, by copying the pattern of the light output from the plurality of light emitting elements (300a, 300b, ..., 300e) so as not to overlap in the pattern unit, light per unit area (light The density of the light indicating the number of spots does not change, and only the number of light (light spots) to be output and the angle of view to which the 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 (that is, the density of light (light spots) is increased).

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

4 is a conceptual view illustrating a lighting device provided in a mobile terminal according to an embodiment of the present invention, Figures 5, 6, 7 and 8 are for explaining the lighting technology using the lighting device of the present invention Conceptual diagram.

First, referring to FIG. 4A, the lighting apparatus 200 according to the present invention diffracts a part of light output from each of the plurality of

optical elements

210a, 210b, 210c,... And the plurality of light emitting elements. It may include a diffractive optical element (DOE) (220).

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

The plurality of light emitting devices may be provided in a die, may be arranged to form a specific pattern, or only at least a portion of the plurality of light emitting devices may be turned on to form the specific pattern. The specific pattern may be determined from when the present lighting apparatus is generated, or may be changed by changing a light emitting device that is turned on.

A die including the plurality of light emitting

devices

210a, 210b, 210c,... May be referred to as a light emitting unit 210. Hereinafter, reference numerals of (210) or (210a, 210b, 210c, ...) will be used for the plurality of light emitting devices.

The diffractive optical element 220 may be disposed in a direction in which light is output from the plurality of light emitting devices. The diffractive optical element 220 may diffract a portion of the light output from the light emitting element and non-diffuse the remaining portion. That is, the diffractive optical element 220 may diffract a portion of the light output from the light emitting element and pass the remaining portion of the light in an unfragmented state (ie, go straight).

Referring to FIG. 4A, the light output from the plurality of light emitting elements and transmitted through the diffractive optical element 220 includes a plurality of first types of light (not diffracted by the diffractive optical element 220). 410a, 410b, 410c, ...) and a plurality of second types of light 420a, 422a, 424a, 426a, 420b, 422b, 424b, 426b, 420c, 422c, 424c, 426c,...).

The plurality of first types of light may refer to light passing through the diffractive optical element 220 in a straight line (non-diffracted) by the light output from the plurality of light emitting devices. In addition, the plurality of second types of light may refer to light through which the light output from the plurality of light emitting elements is diffracted by the diffractive optical element 220 and passes.

The diffractive optical element 220 may diffract (split) one light into a plurality of lights. At this time, the diffraction optical element 220 of the present invention does not diffract light in a pattern unit while maintaining a plurality of patterns of light output from the plurality of light emitting elements, but instead has a specific pattern for each light emitting element. Is different from the conventional diffractive optical element (see FIG. 3) in that it diffracts.

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

On the other hand, the illumination device of the present invention, various types of low-level optical element (for example, microlens array 240, reflective lens, projection lens 230, collimator lens, GCA (Grating Cell Array), mirror / prism array (Mirror / Prism array), fly eye lens, birefringent element, etc.) may be further provided. The lighting 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 vary.

For example, the microlens array 240 is disposed between the plurality of light emitting elements 210 and the diffractive optical element 220, the projection lens 230, so that the light passing through the diffractive optical element is incident, The light transmitted from the diffractive optical element may be disposed in a direction in which the light travels.

The various lenses may be used to refract light such that the light output from the plurality of light emitting elements is incident at an optimized position of the diffractive optical element, or to change an angle of view through which light transmitted through the diffractive optical element travels.

For example, the microlenses provided in the microlens array 240 may be disposed at positions corresponding to the number corresponding to the plurality of

light emitting elements

210a, 210b, 210c, 210d, and 210e.

For example, the microlens array 240 may refract the light output from the plurality of light emitting devices such that the plurality of light output from the plurality of light emitting devices is incident perpendicularly to the diffractive optical device.

As another example, the microlens array 240 may refract the light output from the plurality of light emitting devices such that all of the light output from the light emitting devices disposed at different positions are incident on the center of the diffractive optical device.

The projection lens 230 may be formed to widen an angle of view through which the plurality of first types of light and the plurality of second types of light transmitted through the diffractive optical element 220 travel. That is, when the plurality of light beams passing through the diffractive optical element 220 are incident, the projection lens 230 refracts the plurality of light beams so as to have a wider angle of view than the angle of view of the incident light beams. Can be.

An angle of view through which the plurality of lights transmitted through the projection lens 230 may travel may be wider than an angle of view through which the 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 when the angle of view is formed of a projection lens having a shape that can change a bending rate, the angle of view may be variable.

In the present specification, the diffraction optical element (DOE) performs the division (cloning) of the incident light. However, the present invention is not limited thereto, and the lighting apparatus of the present invention may 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 description of the diffractive optical element may be analogously applied similarly to the case of using a refractive optical element or combining a diffractive optical element and a refractive optical element.

The diffractive optical element 220 of the present invention does not replicate light in units of patterns (that is, patterns in which a plurality of light emitting elements are arranged) formed by the light output from the plurality of light emitting elements. The light can be duplicated so that the output light becomes a specific pattern.

For example, FIG. 4A illustrates that light output from one light emitting device is divided into five light through the diffractive optical device 220. Here, the first type of light among the five lights is one 410a, and the second type of light may be understood as the remaining four

lights

420a, 422a, 424a, and 426a. The light spots to which the five lights are irradiated may form a specific pattern.

As shown in FIG. 3, the diffraction optical element of the present invention is formed so as to divide one light output from one light emitting element into a specific pattern, rather than copying a pattern in which a plurality of light emitting elements are arranged in a pattern unit. Can be. As such, dividing one light into a specific pattern by the diffractive optical device 220 may be applied to the light output from each of the plurality of light emitting devices.

In this case, in the plane 400 spaced apart from the illumination device 200 by a predetermined distance, the shapes of the patterns in which the plurality of light emitting devices are arranged are not copied and irradiated in units of patterns, but light output from each light emitting device. Each of these has a form in which it is irradiated to have a specific pattern.

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

Hereinafter, as shown in FIG. 4B, one light into which the diffractive optical element 220 of the present invention is incident is diffracted (divided) into a 3 by 3 shape (predetermined pattern) 500. An example will be described. In this case, one light irradiated in the middle of 3 by 3 becomes the first type of light (for example, zero-order light), and the remaining eight lights have a second type of light (for example, primary light). Can be.

The diffraction optical element 220 of the present invention can diffract (split) the plurality of light output from the plurality of light emitting elements in the 3 by 3 form (predetermined pattern) and transmit the light. That is, the diffraction optical element 220 of the present invention may divide the light output from the light emitting element into a plurality of light emitting elements so that a predetermined pattern is formed. At this time, the first type of light (ie, unfragmented light) is one 510 among the plurality of lights constituting the predetermined pattern, and the second type of light (ie, diffracted light) is the remaining eight (520). , 521, 522, 523, 524, 525, 526, and 527.

Accordingly, when light is irradiated through the diffraction optical element in the lighting apparatus having a plurality of light emitting elements, the plurality of first types of light and the plurality of second types of light may be irradiated. In addition, the number of the plurality of first types of light may be equal to the number of light emitting elements.

For example, when the plurality of light emitting elements are six as shown in FIG. 5, and the number of light divided to form a predetermined pattern for each light output from each light source is 9 (3 by 3), the first type The number of lights may be six, and the number of lights of the second type may be 48 (6 × 8).

Referring to FIG. 5, the lighting apparatus 200 of the present invention may include a plurality of

light emitting elements

210a, 210b, 210c, 210d, 210e, and 210f.

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

The diffractive optical element 220 of the present invention diffracts (splits, replicates) the incident light such that one light output from each of the plurality of light emitting elements forms a predetermined pattern (for example, 3 by 3). Can be. That is, the diffraction optical element of the present invention does not diffract (split) a plurality of incident light so as to correspond to a pattern in which a plurality of light emitting elements are arranged so as not to overlap each other in a pattern unit, but one light output from each light emitting element is The light may be diffracted (divided) into light source units 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 includes a plurality of first types of light 510a, 510b, 510c, 510d, and 510e that are not undiffracted 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 diffraction optical element 220 of the present invention may be configured to provide a portion of the light output from the plurality of light emitting devices such that at least some of the plurality of second types of light are irradiated into an area in which the plurality of first types of light are connected. Can be diffracted.

For example, as shown in FIG. 5, the diffraction optical element 220 of the present invention may diffract (split) one light output from the light emitting element to have a predetermined pattern for each light emitting element.

Accordingly, as shown in FIG. 5, in the area A to which the plurality of first types of light 510a, 510b, 510c, 510d, 510e, and 510f are connected, at least a part of the plurality of second types of light. (E.g., 527a, 523b, 524b, 525b, 526b, 527b, 525c, 521d, 522d, 524d, 520e, 521e, 522e, 520f, 521f, 523f).

At this time, the remainder except for the at least part of the plurality of second types of light (for example, 520a, 522c, etc.) may not be irradiated in the area A to which the plurality of first types of light are connected. (I.e., it can be irradiated out of the area A).

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

Preferably, the area A may be an area formed when the light spots selected to have the largest area among the light spots to which the plurality of first types of light are irradiated are connected, but are not limited thereto. .

Specifically, as shown in FIG. 5, when a plurality of first types of light and a plurality of second types of light are irradiated onto a plane spaced apart from the lighting apparatus 200 by a predetermined distance, the plurality of second types of light At least some of the light may be irradiated (included) in an area in which the plurality of first types of light are connected.

As described above, the lighting apparatus of the present invention diffracts (divids) the diffractive optical elements so as to have a predetermined pattern for each light output from each light emitting element, and thus the plurality of light outputs from the plurality of light emitting elements are diffracted. In the case of incident on the light source, at least some of the plurality of second types of light are irradiated (included) inside the region where the plurality of first types of light are connected.

On the other hand, referring to FIG. 3, the conventional lighting apparatus diffracts (divids) the plurality of light output from the plurality of light emitting devices so as not to overlap each pattern formed by the plurality of light emitting devices, and thus, the first type of light ( The second type of light 320a, 320b,..., 320h may not be irradiated (included) in the region to which the 310 is connected.

On the other hand, referring to Figure 6, the diffraction optical element 220 of the present invention, the distance between any one of the plurality of first types of light and the second type of light associated with the one of the plurality of light The light output from the plurality of light emitting elements can be diffracted (divided and transmitted) to be within three times the minimum distance between the first types of light.

For example, the plurality of first types of light and the plurality of second types of light transmitted through the diffractive optical element may be shown in a plane spaced apart from the illumination device 200 by a predetermined distance. The predetermined distance may be an appropriate distance between a camera and a subject photographed by the camera, and may have various values. For example, the predetermined distance may have a value of several centimeters to several hundred meters or more.

The distances d1 and d2 between any one of the plurality of first types of light irradiated onto the plane and the second type of light 522a and 524a associated with the one of the light types are as described above. It may be within three times the minimum distance (distance between 510e and 510f in the case of FIG. 6) l between the plurality of first types of light irradiated onto the plane.

That is, when the first type of light in which one light is divided and the second type of light form a predetermined pattern, the first type of light 510a constituting the predetermined pattern and the second type of light constituting the predetermined pattern 520a,..., 520f may be understood to be light associated with each other.

Any one of the plurality of first types of light (eg, 510a) and the second type of light 520a,..., 520f associated with the one of the lights may be light associated with each other.

In other words, the distance between any one of the light of the first kind and a second kind of light associated with the one of the light is diffracted with the undiffracted light when one light passes through the diffractive optical element. It can mean the distance between the light. The distance between the undiffracted light and the diffracted light can have various values, whichever value is irrelevant. However, it is preferable that the distances d1 and d2 between the non-diffracted light and the diffracted light mean a maximum distance d2.

In summary, the diffractive optical element of the present invention has a (maximum) distance (the 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. The light output from the plurality of light emitting elements can be transmitted so as not to exceed three times the minimum distance between the plurality of non-diffracted light (a plurality of first types of light).

Further, the distance between the light of any one and the second type of light associated with the light (or the distance between the light divided by one light or the first type of light divided by one light The distance between the two kinds of light may not be more than three times the minimum distance between the plurality of first kinds of lights (ie, d1 <3l or d2 <3l).

In FIG. 6, the distance between any one of the plurality of first types of light and the second type of light associated with the one light is less than one times the minimum distance between the plurality of first types of light. Diffraction (divided) is shown.

However, the diffractive optical element of the present invention is formed such that the distance between the first type of light and the second type of light divided in one light is radiated within three times the minimum distance between the plurality of first types of light. Can be. 3 times is the result derived from the experimental value which produces the optimized efficiency. Therefore, in the present invention, the distance between the first type of light and the second type of light divided in the one light is not limited to the above three times, and the distance between the plurality of first types of light is 3 times the minimum distance. It may be larger or smaller than a certain size.

On the other hand, referring to FIG. 3, the conventional lighting apparatus divides (replicates) the light in a pattern unit, and thus, between the light of any one type of light and the second type of light associated with any one of the light types. The distance should be irradiated at least three times the minimum distance between the lights of the first kind. This is because the conventional lighting apparatus must be divided (replicated) so as not to overlap each other in the pattern unit in which the plurality of light emitting elements are arranged.

Meanwhile, referring to FIG. 7, a plurality of light emitting devices of the present invention may be arranged to form a specific pattern P. FIG.

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

lights

520a, 520b, 520c, 520d, 520e, and 520f may also form the specific pattern P.

That is, as illustrated in FIG. 7, diffraction (division, refraction) in the same direction among the plurality of first types of light 510a, 510b, 510c, 510d, 510e, and 510f and the plurality of second types of light. The

lights

520a, 520b, 520c, 520d, 520e, and 520f may be irradiated to have a specific pattern P corresponding to the arrangement pattern P of the plurality of light emitting devices.

At this time, the portion B of the first region occupied by the specific pattern P formed by the plurality of first types of light and the plurality of second types of light (specifically, the plurality of second types of light). A portion B of the second region occupied by the specific pattern P formed by the light diffracted in the same direction may overlap each other.

This is because the diffraction 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 the first type of light (non-diffracted light) and second divided from one light. This is because the light is transmitted so that the distance between kinds of light (diffracted light) is less than three times the minimum distance between the plurality of first kinds of light (non-diffracted lights).

As described above, the present invention relates to a region occupied by a pattern formed by a plurality of first kinds of light and a pattern formed by a plurality of second kinds of light (a pattern formed by a plurality of second kinds of light diffracted in the same direction). The area occupied by) may overlap.

On the other hand, referring to FIG. 3, the conventional lighting apparatus divides a plurality of light output from a plurality of light emitting devices so as not to overlap each other in a pattern unit in which the plurality of light emitting devices are arranged. The area occupied by the pattern of the light 310 and the area occupied by the pattern of the light 320a of the second type do not overlap each other.

By the above-described lighting technique, the lighting apparatus of the present invention can increase the number of lights (light spots) irradiated per unit area C (that is, the density of light).

Referring to FIG. 8, as the number of the plurality of second types of light diffracted by the diffractive optical element 220 increases, the density of the first and second types of light may increase. In other words, as the number of the plurality of second types passing through the diffractive optical element 220 increases, the density of the first and second types of light (that is, light irradiated per unit area C (light spot)) Number increases.

On the other hand, as shown in Fig. 3, the conventional lighting device (lighting technique) is a light source (light spot) per unit area C, no matter how many kinds of light are diffracted by the diffractive optical element. The number (ie the density of the first and second kinds of light) is constant. This is because the conventional lighting apparatus duplicates a plurality of lights output from the plurality of light emitting elements in a pattern unit in which a plurality of light emitting elements are arranged.

On the other hand, the mobile terminal of the present invention may include the lighting device described herein.

The present invention described above can be embodied as computer readable codes on a medium in 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 computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. This also includes implementations in the form of carrier waves (eg, transmission over the Internet). In addition, the computer may include the controller 180 of the terminal. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims

A plurality of light emitting elements; And

A diffraction optical element (DOE) diffracting a part of light output from each of the plurality of light emitting elements,

The light output from the plurality of light emitting elements and transmitted through the diffractive optical element includes a plurality of first kinds of light that are not undiffed by the diffractive optical element and a plurality of second kinds of light diffracted by the diffractive optical element. Including;

The diffractive optical element diffractes a portion of the light output from the plurality of light emitting elements such that at least a portion of the plurality of second types of light is irradiated into a region connecting the plurality of first types of light. Lighting equipment.
The method of claim 1,

When the plurality of first types of light and the plurality of second types of light are irradiated onto a plane spaced apart from the lighting apparatus by a predetermined distance, at least a part of the plurality of second types of light may be provided by the plurality of irradiated lights. A lighting device, characterized in that irradiated inside the area connecting the first kind of light.
The method of claim 2,

The distance between any one of the plurality of first types of light irradiated onto the plane and the second type of light associated with the one of the lights is between the plurality of first types of light irradiated onto the plane. Lighting device, characterized in that less than three times the minimum distance.
The method of claim 1,

The plurality of light emitting devices are arranged to form a specific pattern,

And the plurality of first types of light and the plurality of second types of light are irradiated to form the specific pattern, respectively.
The method of claim 4, wherein

A portion of the first region occupied by the specific pattern formed by the plurality of first kinds of light and a portion of the second region occupied by the specific pattern formed by the plurality of second kinds of light overlap each other. Lighting device.
The method of claim 1,

The diffraction optical element,

And a plurality of light emitting devices to divide the light output from the light emitting devices so that a predetermined pattern is formed.
The method of claim 1,

The number of the plurality of first types of light is the same as the number of the plurality of light emitting elements.
The method of claim 1,

And as the number of the plurality of second types of light diffracted by the diffractive optical element increases, the density of the first and second types of light increases.
A mobile terminal comprising the lighting device according to any one of claims 1 to 8.