KR20200027760A - Mobile terminal and method for heat spread sheet - Google Patents

Abstract

Provided is a mobile terminal comprising: a first body; a second body disposed in parallel with the first body; a hinge unit for connecting the first body and the second body to vary an angle between the first body and the second body; a flexible display positioned on one surface of the first body and one surface of the second body; a main board mounted on the inside of the first body and including a heat generating component; a battery mounted on the inside of the second body; and a heat radiation sheet positioned on the inside of the first body and the second body and absorbing heat of the heat generating component to diffuse the heat from the first body to the second body, wherein the heat radiation sheet includes a graphite sheet, and a first coating layer and a second coating layer coupled to both surfaces of the graphite sheet by a thermal compression method. Therefore, the mobile terminal is capable of preventing heat radiation performance from being degraded due to damage to the heat radiation sheet at a bent portion of a foldable mobile terminal consisting of two bodies.

Description

Manufacturing method of mobile terminal and heat dissipation sheet {MOBILE TERMINAL AND METHOD FOR HEAT SPREAD SHEET}

The present invention relates to a method for manufacturing a mobile terminal and a heat dissipation sheet having a heat dissipation sheet that improves the heat dissipation sheet structure of a foldable mobile terminal to secure reliability in a bent portion.

Terminals can be divided into mobile terminals (mobile / portable terminals) and stationary terminals according to their mobility. Again, the mobile terminal may be divided into a handheld terminal and a vehicle mounted terminal according to whether the 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. In some terminals, an electronic game play function is added or a multimedia player function is performed. In particular, recent mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.

As the function is diversified, such a terminal is a multimedia player having multiple functions, such as taking a picture or a video, playing music or a video file, receiving a game, or broadcasting. Is being implemented.

As the functions of the mobile terminal are diversified, heat is generated in a driving chip driving the mobile terminal, and particularly, a large amount of heat is generated in an application processor (AP), which is a main driving chip. When a lot of heat is generated from the driving chip, there is a problem that the performance of the driving chip is deteriorated. In order to secure the performance of the driving chip, the problem of dissipating heat generated from the driving chip has emerged as an important problem.

An object of the present invention is to provide a method for manufacturing a mobile terminal and a heat dissipation sheet having a heat dissipation sheet that secures reliability in a bent portion by improving the heat dissipation sheet structure of a foldable mobile terminal.

A first body; A second body disposed parallel to the first body; A hinge part connecting the first body and the second body such that an angle formed between the first body and the second body is variable; A flexible display positioned on one surface of the first body and one surface of the second body; A main substrate mounted inside the first body and including a heating component; A battery mounted inside the second body; And a heat dissipation sheet located inside the first body and the second body and absorbing heat from the heating element to diffuse from the first body to the second body, the heat dissipation sheet being a graphite sheet; And a first coating layer and a second coating layer coupled to both sides of the graphite sheet by thermal compression.

At least one of the first coating layer and the second coating layer may include polyimide.

The first coating layer may include SUS material.

The heat dissipation sheet may be attached to a rear surface of the flexible display to support the flexible display.

In the heat dissipation sheet, a portion positioned between the first body and the second body may not be attached to the flexible display.

The graphite sheet may have openings or slits.

At least one of the first body and the second body further includes a metal plate located therein, and the heat dissipation sheet may contact the metal plate.

Laminating a graphite sheet on the first coating layer; Laminating a second coating layer on the graphite sheet; Forming a heat dissipation sheet by thermally pressing the first coating layer, the graphite sheet, and the second coating layer; And cooling the compressed heat dissipation sheet, and at least one of the first coating layer and the second coating layer provides a heat dissipation sheet manufacturing method including polyimide.

The step of forming a slit or an opening in the graphite sheet may be further included prior to the step of stacking a graphite sheet on the first coating layer.

The thermocompressing may include depositing a stacked structure of the first coating layer, the graphite sheet, and the second coating layer on each layer of a jig having a plurality of layers, respectively; And simultaneously thermocompressing the plurality of layers of the jig.

The thermocompression bonding may be performed under vacuum conditions.

According to an embodiment of the present invention, it is possible to prevent the heat dissipation performance from being deteriorated due to the heat dissipation sheet being damaged in a bent portion of a foldable mobile terminal composed of two bodies.

In addition, it has a greater rigidity and durability than a conventional heat dissipation sheet and can be used as a support structure for supporting the rear surface of the display unit.

By using the heat dissipation sheet disposed over the two bodies, heat generated from the driving chip can be effectively released, and when used, only the driving chip portion can be prevented from being heated, and heat can prevent other parts from being damaged.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art, and thus, it should be understood that specific embodiments such as detailed description and preferred embodiments of the present invention are given as examples only.

1 is a block diagram illustrating a mobile terminal related to the present invention.
2A and 2B are diagrams illustrating a first state and a second state of an embodiment of a mobile terminal related to the present invention.
3 is a view for explaining the arrangement of the main substrate, battery and heat dissipation sheet of a mobile terminal according to the present invention.
4 is a view for explaining a method of manufacturing a heat radiation sheet of a mobile terminal of the present invention.
5 is a view showing an embodiment of a heat radiation sheet of a mobile terminal of the present invention.

Hereinafter, embodiments of the present disclosure 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 mixed in consideration of ease of specification, and do not have distinct meanings or roles. In addition, in describing the embodiments disclosed in the present specification, when it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed herein, detailed descriptions thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or 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 other components.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It 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 no other component exists in the middle.

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

In this application, the terms "comprises" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described herein, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Mobile terminals described herein include mobile phones, smart phones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation, and slate PCs. , Tablet PC (tablet PC), ultrabook (ultrabook), wearable device (wearable device, for example, a watch-type terminal (smartwatch), glass-type terminal (smart glass), HMD (head mounted display), etc. may be included have.

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

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, and a power supply unit 190 ) And the like. The components shown in FIG. 1 are not essential for implementing a mobile terminal, so the mobile terminal described herein may have more or fewer components than those listed above.

More specifically, the wireless communication unit 110 among 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 an external server It may include one or more modules that enable wireless communication between. Also, the wireless communication unit 110 may include one or more modules connecting the mobile terminal 100 to one or more networks.

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

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

The sensing unit 140 may include 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 includes a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity G-sensor, gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor), fingerprint scan sensor, ultrasonic sensor , Optical sensor (e.g., camera (see 121)), microphone (see 122, battery), battery gauge, environmental sensor (e.g. barometer, hygrometer, thermometer, radioactivity detection sensor, Thermal sensing sensor, gas sensing sensor, etc.), chemical sensors (eg, electronic nose, health care sensor, biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in this specification may combine and use information sensed by at least two or more of these sensors.

The output unit 150 is for generating output related to vision, hearing, or tactile sense, and includes at least one of a display unit 151, an audio output unit 152, a hap tip module 153, and an optical output unit 154 can do. The display unit 151 may form a mutual layer structure with the touch sensor or may be integrally formed, thereby realizing 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 at the same time, provide an output interface between the mobile terminal 100 and the user.

The interface unit 160 serves as a passage with various types of external devices connected to the mobile terminal 100. 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 related to the connected external device may be performed.

Also, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a number of application programs (application programs) that are driven in the mobile terminal 100, data for operation of the mobile terminal 100, and instructions. At least some of these applications may be downloaded from external servers 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, an incoming call, an outgoing function, a message reception, and an outgoing function). Meanwhile, 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.

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

In addition, the controller 180 may control at least some of the components described with reference to FIG. 1 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 for driving the application program.

Under the control of the controller 180, the power supply unit 190 receives external power and internal power to supply power to each component included in the mobile terminal 100. The power supply unit 190 includes a battery, and the battery 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 a mobile terminal according to various embodiments described below. Also, 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, prior to examining various embodiments implemented through the mobile terminal 100 described above, the components listed above will be described in more detail with reference to FIG. 1.

First, referring to the wireless communication unit 110, the broadcast reception module 111 of the wireless communication unit 110 receives a broadcast signal and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more 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 includes technical standards or communication methods for mobile communication (eg, Global System for Mobile Communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (CDMA2000), EV -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) transmits and receives wireless signals to and from at least one of a base station, an external terminal and a server on a mobile communication network constructed according to (Long Term Evolution-Advanced).

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

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

Wireless Internet technologies include, for example, WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro (Wireless Broadband), WiMAX (World) Interoperability for Microwave Access (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 wireless Internet module ( 113) transmits and receives data according to at least one wireless Internet technology in a range including the Internet technology not listed above.

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

The short-range communication module 114 is for short-range communication, Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, NFC (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus) using at least one of the technology, it can support short-range communication. The short-range communication module 114 may be provided between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or through the mobile terminal 100 through wireless area networks. ) And other mobile terminals (100, or an external server) is located between the network can support wireless communication. The short-range wireless communication network may be wireless personal area networks (Wireless Personal Area Networks).

Here, the other mobile terminal 100 is a wearable device (for example, a smartwatch), smart glasses capable of exchanging data (or interoperable) with the mobile terminal 100 according to the present invention. (smart glass), HMD (head mounted display). The short-range communication module 114 may detect (or recognize) a wearable device capable of communicating with the mobile terminal 100 around the mobile terminal 100. Furthermore, 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, and the short-range communication module ( 114) to the wearable device. 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, the user performs a phone call through the wearable device when a call is received by the mobile terminal 100 or, when a message is received by the mobile terminal 100, the user receives the call 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 examples thereof include a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, if the mobile terminal utilizes a GPS module, the location of the mobile terminal can be acquired using a signal sent from a GPS satellite. As another example, if the mobile terminal utilizes a Wi-Fi module, the location of the mobile terminal may be obtained based on information of a Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal. If necessary, the location information module 115 may perform any function of other modules of the wireless communication unit 110 in order to obtain data regarding the location of the mobile terminal by substitution or additionally. The location information module 115 is a module used to acquire the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or acquires 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, and for inputting 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 an image sensor in a video call mode or a shooting mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170. Meanwhile, 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 the matrix structure, various angles or focuses may be applied to the mobile terminal 100. A plurality of image information may be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire left and right images for realizing a stereoscopic image.

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

The user input unit 123 is for receiving information from a user. When information is input through the user input unit 123, the controller 180 may control the operation of the mobile terminal 100 to correspond to the input information. . The user input unit 123 is a mechanical input means (or a mechanical key, for example, a button located on the front, rear or side of the mobile terminal 100, a dome switch, a jog wheel, And a jog switch) and touch input means. As an example, the touch-type input means is made of a virtual key, a soft key or a visual key displayed on the touch screen through software processing, or a part other than the touch screen It may be made of a touch key (touch key) disposed on. Meanwhile, the virtual key or the visual key may be displayed on the touch screen while having various forms, for example, a 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 based on the sensing signal, or perform data processing, function, or operation related to an application program installed in the mobile terminal 100. 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 in the vicinity using mechanical force or infrared rays, etc., without mechanical contact. The proximity sensor 141 may be provided with a proximity sensor 141 in the inner region of the mobile terminal or the touch screen, which is surrounded by the touch screen described above.

Examples of the proximity sensor 141 include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive type proximity sensor, a magnetic type proximity sensor, and an infrared proximity sensor. When the touch screen is capacitive, the proximity sensor 141 may be configured to detect the proximity of the object by a change in 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 description, the act of allowing an object to be recognized as being located on the touch screen without being touched on the touch screen is called a “proximity touch”, and the touch The act of actually contacting an object on the screen is called "contact touch". The location where an object is touched close on the touch screen means a location where the object is perpendicular to the touch screen when the object is touched close. The proximity sensor 141 may detect a proximity touch and a proximity touch pattern (eg, proximity touch distance, proximity touch direction, proximity touch speed, proximity touch time, proximity touch position, proximity touch movement state, etc.). have. Meanwhile, as described above, the controller 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern detected through the proximity sensor 141, and further, visual information corresponding to the processed data. It can be output on the touch screen. Furthermore, the controller 180 may control the mobile terminal 100 such that different operations or data (or information) are processed according to whether a touch on the same point on the touch screen is a proximity touch or a touch touch. .

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

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

As such, when there is a touch input to the touch sensor, the signal (s) corresponding thereto is sent to the touch controller. The touch controller processes the signal (s) and then transmits corresponding data to the controller 180. Accordingly, the control unit 180 can know which area of the display unit 151 has been touched, and the like. 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 controls or perform the same control according to the type of the touch object that touches the touch screen (or a touch key provided in addition to the touch screen). Whether to perform different control or the same control according to the type of the touch object, it may be determined according to an operating state of the current mobile terminal 100 or an application program being executed.

On the other hand, the touch sensors and proximity sensors described above are independently or in combination, such as short (or tap) touch on the touch screen, long touch, multi touch, drag touch ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, etc. You can sense the touch.

The ultrasonic sensor may recognize location information of a sensing target 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 generator can be calculated by using a property in which light is much faster than ultrasound, that is, a time when light reaches the optical sensor is much faster than a time when the ultrasound reaches the ultrasonic sensor. More specifically, the position of the wave generating source may be calculated by using a time difference from the time at which ultrasonic waves reach the light as a reference signal.

On the other hand, the camera 121, as seen with 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 target for 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 close to the touch screen. More specifically, the photo sensor mounts photo diodes and TRs (transistors) in rows / columns to scan the contents loaded on the photo sensor using electrical signals that change according to the amount of light applied to the photo diode. That is, the photo sensor performs coordinate calculation of the sensing object according to the change amount of light, and through this, location information of the sensing object may 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 by the mobile terminal 100, or UI (User Interface) or GUI (Graphic User Interface) information according to the execution screen information. .

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

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

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

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

In addition to vibration, the haptic module 153 is used for stimulation such as pin arrangement that vertically moves with respect to the skin surface of the contact, spraying or suctioning power of air through a spray or intake, grazing on the skin surface, contact with an electrode, and electrostatic force. Various tactile effects can be generated, such as an effect caused by an effect and an effect of reproducing a feeling of cold and warm using an element capable of absorbing heat or generating heat.

The haptic module 153 may not only deliver a tactile effect through direct contact, but may also be implemented so that the user can feel the tactile effect through muscle sensations such as fingers or arms. 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 the occurrence of an event using the light of the light source of the mobile terminal 100. Examples of events occurring in the mobile terminal 100 may include receiving messages, receiving call signals, missed calls, alarms, schedule notifications, receiving emails, and receiving information through applications.

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

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

On the other hand, the identification module is a chip that stores various information for authenticating the usage rights of the mobile terminal 100, a user identification module (UIM), a subscriber identity module (SIM), universal user authentication And a universal subscriber identity module (USIM). The device provided with the identification module (hereinafter referred to as an 'identification device') may be manufactured in a smart card format. Accordingly, 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 becomes a passage through which power from the cradle is supplied to the mobile terminal 100 or is input by the user from the cradle. Various command signals may be passages to the mobile terminal 100. Various command signals or power inputted from the cradle may be operated as signals for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The memory 170 may store a program for the operation of the controller 180, and may temporarily store input / output data (eg, a phone book, a message, a still image, a video, etc.). The memory 170 may store data related to various patterns of vibration and sound output when a touch is input on the touch screen.

The memory 170 is a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card micro type ), Card-type memory (e.g. SD or XD memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read (EPMROM) It may include a storage medium of at least one type of -only memory), PROM (programmable read-only memory), magnetic memory, magnetic disk, and optical disk. The mobile terminal 100 may be operated in connection with a web storage performing a storage function of the memory 170 on the Internet.

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

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

The power supply unit 190 receives external power and internal power under the control of the controller 180 to supply power required for the operation of each component. The power supply unit 190 includes a battery, and the battery may be a built-in battery made to be charged, and may be detachably coupled to a terminal for charging or the like.

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

As another example, the power supply unit 190 may be configured to charge the battery wirelessly without using the connection port. In this case, the power supply unit 190 uses one or more of an inductive coupling method based on a magnetic induction phenomenon from an external wireless power transmission device or a magnetic resonance coupling method based on an electromagnetic resonance phenomenon. Power can be delivered.

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

2A and 2B are views showing a first state and a second state of an embodiment of the mobile terminal 100 related to the present invention. The mobile terminal of the present invention is composed of two bodies, and the second body 102 is disposed on the first side of the first body 101. The angle between the first body 101 and the second body 102 is changeable by combining the first body 101 and the second body 102 by a hinge portion.

In the drawing, the first body 101 and the second body 102 have a rectangular shape, and the second body 102 is disposed alongside the long side of the first body 101, and the first body 101 and the second body The width direction of (102) may be referred to as a first direction, and a longitudinal direction perpendicular to it may be referred to as a second direction. However, the first direction and the second direction are not limited to the width direction and the length direction, and the first direction may be the length direction and the second direction may be the width direction.

The first body 101 and the second body 102 may have the same size, but in this embodiment, most of the electronic components are mounted on the first body 101 and the second body 102 is the first body 101. Thinner can be used. When the space in which the electronic components are mounted is divided into two, the usable space is reduced compared to the actual volume, so the method of mounting most electronic components on one side of the body is advantageous in reducing the overall size.

The mobile terminal 100 includes a case (for example, a frame, a housing, a cover, etc.) forming an exterior. A plurality of cases are combined to form an internal space, and various electronic components are disposed in the internal space.

The display unit 151 is disposed on the front of the terminal body to output information. As shown, the window 151a of the display unit 151 is mounted on the front case to form the front surface of the terminal body together with the front case. These cases may be formed by injection of synthetic resin or may be formed of metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case provides the interior space. In this case, the mobile terminal 100 of a unibody in which synthetic resin or metal extends from the side to the rear may be implemented.

The mobile terminal 100 includes a display unit 151, an audio output unit 152, a proximity sensor 141, an illumination sensor 142, an optical output unit 154, a camera 121, a user input unit 123, a microphone 122, an interface unit 160, and the like may be provided.

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

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

In particular, the present invention can use a display unit 151 in which the curvature of the display unit 151 can be changed when two bodies rotate around the hinge unit. As shown in FIG. 2B, the display unit 151 may be configured to be deformable by external force. The deformation may be at least one of bending, bending, folding, twisting, and curling of the display unit 151.

Depending on the shape of the hinge and the combination of the display unit and the flexible display unit 151, a mobile terminal having a curved shape in only one direction may be used, or it may be curved in both directions as illustrated in FIG. 2B.

The deformable display unit 151 may be referred to as a 'flexible display unit'. Here, the flexible display unit 151 may include both a general flexible display, an e-paper, and a combination thereof.

A general flexible display refers to a sturdy display that is light and easy to break because it is made on a thin and flexible substrate that can bend, bend, fold, twist, or curl like paper, while maintaining the characteristics of a conventional flat panel display. In particular, an OLED display using an organic light emitting diode (OLED) can be implemented as a flexible member without a backlight, and is used for a flexible or flexible display unit due to a small effect on an image even when it is bent.

In addition, the electronic paper is a display technology to which general ink characteristics are applied, and the point of using reflected light may be different from a conventional flat panel display. The electronic paper may change information by using a twist ball or electrophoresis using a capsule.

In a state in which the flexible display unit 151 is not deformed (for example, a state having an infinite curvature radius, hereinafter referred to as a first state), the display area of the flexible display unit 151 is flat. In the state deformed by an external force in the first state (for example, a state having a finite curvature radius, hereinafter referred to as a second state), the flexible display area may be a curved surface. As illustrated, information displayed in the second state may be visual information output on a curved surface. Such visual information is implemented by independently controlling the light emission of sub-pixels arranged in a matrix. The unit pixel refers to a minimum unit for implementing one color.

The flexible display unit 151 may be placed in a curved state (for example, a vertically or horizontally curved state) rather than a flat state in the first state. In this case, when an external force is applied to the flexible display unit 151, the flexible display unit 151 may be transformed into a flat state (or a less curved state) or a more curved state.

The flexible display unit 151 may include a touch sensor that senses a touch on the flexible display unit 151 so that a control command can be input by a touch method. Using this, when a touch is made to the flexible display unit 151, the touch sensor detects the touch, and the controller 180 can be configured to generate a control command corresponding to the touch based on the touch. The content input by the touch method may be a letter or a number, or an instruction or designable menu item in various modes.

On the other hand, the touch sensor is composed of a film having a touch pattern, is disposed between the display (not shown) on the back surface of the window 151a and the window 151a, or a metal wire that is directly patterned on the back surface of the window 151a. It can be. Alternatively, the touch sensor may be formed integrally with the display. For example, the touch sensor may be disposed on the substrate of the display, or may be provided inside the display.

As such, the flexible display unit 151 may form a touch screen together with a touch sensor, and in this case, the touch screen may function as a user input unit 123 (see FIG. 1). The flexible touch screen may be configured to sense a touch input in the first state as well as the second state.

On the other hand, the mobile terminal 100 according to the present modification example may be provided with a deformation detecting means capable of detecting deformation of the flexible display unit 151. The deformation detecting means may be included in the sensing unit 140 (see FIG. 1).

The deformation detecting means is provided in the flexible display unit 151 or the case 101, and can detect information related to deformation of the flexible display unit 151. Here, the information related to the deformation may be a direction in which the flexible display unit 151 is deformed, a deformed degree, a deformed position, a deformed time, an acceleration at which the deformed flexible display unit 151 is restored, and the like. In addition, it may be a variety of information that can be detected due to the bending of the flexible display unit 151.

In addition, the controller 180 changes information displayed on the flexible display unit 151 based on information related to the deformation of the flexible display unit 151 sensed by the deformation detecting means, or the mobile terminal 100. It is possible to generate a control signal for controlling the function of.

Meanwhile, the mobile terminal 100 according to the present modification example may include a case 101 accommodating the flexible display unit 151. The case 101 may be configured to be deformable together with the flexible display unit 151 by an external force in consideration of characteristics of the flexible display unit 151.

Deformation of the state of the flexible display unit 151 is not limited only to external force. For example, when the flexible display unit 151 has a first state, it may be transformed into a second state by a user or an application command.

The flexible display unit 151 includes a first area 1511 located on one surface of the first body 101 in a second state, a second area 1512 located on one surface of the second body 102, and a first area. It is composed of a third region 1513 positioned between the region 1511 and the second region 1512. The third region 1513 covers the side surfaces of the first body 101 and the second body 102 in the second state.

When the first body 101 and the second body 102 are made of a rigid material, the first region 1511 and the second region 1512 attached to the first body 101 are not bent, but are removed from the second state. When changing to the 1 state, the third region 1513 of the flexible display unit 151 is bent.

That is, as the third area 1513 that covered one surface of the first body 101 in the first state moves to the side of the mobile terminal, one end of the first body 101 has one end of the third area 1513. The width corresponding to is exposed.

The first sound output unit 152a may be implemented as a receiver that delivers a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia playback sounds. ).

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

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

The user input unit 123 is an example of the user input unit 123 that is operated to receive a command for controlling the operation of the mobile terminal 100, and may also be collectively referred to as a manipulating portion. The user input unit 123 may be adopted in any manner as long as the user operates it while receiving a tactile feeling, such as touch, push, scroll. The user input unit 123 may also be employed in such a way that it operates without a user's tactile feeling through a proximity touch, a hovering touch, or the like. Contents input by the user input unit 123 may be variously set.

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 143 as an authentication means. The fingerprint recognition sensor 143 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 is a passage through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 is a connection terminal for connection with other devices (eg, earphones, external speakers), a port for short-range communication (eg, an infrared port (IrDA Port), a Bluetooth port (Bluetooth) Port, Wireless LAN Port, etc.], or at least one of a power supply terminal for supplying power to the mobile terminal 100. The interface unit 160 may be implemented in the form of a socket that accommodates an external card such as a subscriber identification module (SIM) or a user identity module (UIM) or a memory card for storing information.

A second sound output unit 152b may be additionally disposed on the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, or 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 may be formed in the case. For example, the antenna forming part of the broadcast receiving module 111 (see FIG. 1) 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 containing a conductive material functions as an antenna.

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

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

An accessory that protects the appearance or assists or expands the function of the mobile terminal 100 may be added to the mobile terminal 100. An example of such an accessory is a cover or pouch that covers or accommodates at least one side of the mobile terminal 100. The cover or pouch may be configured to expand the function of the mobile terminal 100 in conjunction with the display unit 151. Another example of an accessory is a touch pen for assisting or extending a touch input to a touch screen.

3 is a view for explaining the arrangement of the main substrate 181, the battery 191 and the heat dissipation sheet 200 of the mobile terminal 100 related to the present invention. Referring to FIG. 3, a battery 191 is mounted on the first body 101 and a main substrate 181 is mounted on the second body 102. The components mounted on the first body 101 and the second body 102 may be changed, but when the components are distributed on both sides, the main substrate 181 and the battery 191 are located on different bodies.

The main substrate 181 is a plate-shaped member on which heat generating parts 182 such as various driving chips are mounted, and the driving chip 182 is various types of display units 151, wireless communication units, and audio output units of the mobile terminal 100. Responsible for driving parts. When the mobile terminal 100 is used for a long time, when the driving chip 182 generates heat and the temperature is higher than a certain level, the driving chip may not finish and an error may occur or be damaged. In addition, if too hot heat is gathered in one place, there is a risk of burns or the like when the user holds the mobile terminal 100.

Since heat generated in the heat generating component 182 must be quickly discharged, a heat dissipation sheet 200 that diffuses concentrated heat can be used. The larger the area of the heat dissipation sheet 200 is, the more helpful it is to disperse heat and dissipate heat.

The heat dissipation sheet 200 may be used to diffuse heat generated from the heating component 182 mounted on the main substrate 181. In general, the heat dissipation sheet 200 may use a thin film made of a metal material having a high thermal conductivity such as copper or a member having a high thermal conductivity made of a carbon material such as graphite.

The graphite sheet 220 is a member made of a thin paper-like material by compressing carbon, and thus, the graphite sheet is replacing the copper sheet for the mobile terminal 100 that is slimmer and slimmer because it is thinner and lighter than a metal sheet such as copper.

As shown in FIG. 3, the heat dissipation sheet 200 is extended not only to the second body 102 where the main substrate 181 generating heat is located, but also to the first body 101 to secure a wider heat dissipation area. can do.

However, as described above, since the angles of the first body 101 and the second body 102 of the mobile terminal 100 of the present invention change, the heat dissipation sheet 200 also includes the first body 101 and the second body ( 102) repeatedly deformed. In this case, the graphite sheet 220 may be damaged.

Conventionally, the adhesive is attached to at least one surface and adhered to the heating component 182, but if deformation occurs repeatedly, a problem occurs in that the adhesive is separated from the graphite and the adhesive. In order to solve the above problem, the present invention provides a heat dissipation sheet 200 in which the graphite sheet 220 is not damaged even by a change in curvature by thermally forming a coating layer 210 on both sides of the graphite sheet 220.

4 is a view for explaining a method of manufacturing the heat dissipation sheet 200 of the mobile terminal 100 of the present invention. The first coating layer 211 is stacked, the graphite sheet 220 is stacked thereon, and the second coating layer 212 is stacked thereon. At least one of the first coating layer 211 and the second coating layer 212 may include polyimide. Polyimide is a stable material that does not change in physical properties over a wide temperature range, and is a major material for flexible printed circuit boards.

As a thermosetting resin, deformation occurs when heat is applied at a high temperature, and thereafter, there is an advantage of excellent fixing force and excellent frictional force in the form. When the polyimide is included on at least one side as shown in FIG. 4, even if the carbon molecules of graphite are in close contact with the polyimide and bending deformation occurs in the heat dissipation sheet 200, the heat dissipation effect can be maintained because the graphite sheet 220 is not broken. .

When both sides are formed of polyimide, there is an advantage that the adhesion is stronger, and when one side is made of a metal material such as SUS, the display unit 151 replaces the middle frame supporting the rear surface of the display unit 151 in the prior art. ) And may serve as the ground of the mobile terminal 100.

Since the graphite sheet 220 can be easily broken when the curvature changes, it is difficult to manufacture the tape-shaped graphite sheet 220 wound on the roll and the coating layer 210 in a pressing manner, so that the graphite sheet 220 of a predetermined size A method of compressing a laminated structure in which a pair of coating layers 210 are stacked may be used. It is possible to easily manufacture a plurality of heat dissipation sheets 200 by placing a laminated structure on each layer of a jig made of several layers (about 100 or more layers) and simultaneously compressing them.

The graphite sheet 220 can be thinly formed to about 0.017 to 0.024 mm, and when the first coating layer 211 and the second coating layer 212 are formed to about 0.1 to 0.2 mm, a thin heat dissipation sheet (200 to 0.217 to 0.4 mm level) ) Can be prepared. The thermocompression processing can be produced by thermocompression and cooling at a temperature of 150 to 165 ° C at a pressure of 60 to 65 kgf.

The first coating layer 211 and the second coating layer 212 are formed only on a curved portion of the heat dissipation sheet 200, and the other portion is directly attached to other parts (such as the display portion 151 or a metal plate) using an adhesive. can do.

The heat dissipation sheet 200 may be in direct contact with the heat generating component 182 to absorb heat from the heat generating component 182 or may receive heat through an adhesive tape having high thermal conductivity. The heat dissipation sheet 200 may support the rear surface of the flexible display unit 151 and 151 on the front side. In this case, a boundary portion between the first body 101 and the second body 102 that is a bent portion of the flexible display unit 151 may be bent separately without attaching the heat dissipation sheet 200. This is to prevent damage to the display portion 151 as it may be damaged in a curved portion.

5 is a view showing an embodiment of the heat dissipation sheet 200 of the mobile terminal 100 of the present invention. As illustrated in FIG. 5, the coating layer 210 may be formed wider than the graphite sheet 220.

When the air is accidentally compressed during the thermal compression process, air bubbles may be generated and an air layer may be formed between the graphite sheet 220 and the first coating layer 211 or the second coating layer 212. In order to prevent the air layer from being generated, when the slit 221 is formed in the graphite sheet 220 as shown in FIG. 5 (a) or the hole 221 is formed as shown in FIG. 5 (b), the air layer is formed. There is an advantage that the bonding strength of the layered structure of the heat dissipation sheet 200 is further improved by preventing and preventing the first coating layer 211 and the second coating layer 212 from directly contacting each other. The thermal compression process may be performed in a vacuum state to prevent the air layer from being generated. As described above, according to an embodiment of the present invention, it is possible to prevent the heat dissipation performance from being deteriorated due to damage to the heat dissipation sheet 200 in a curved portion of the foldable mobile terminal 100 made of two bodies.

In addition, it has a greater rigidity and durability than the conventional heat dissipation sheet 200, so it can be used as a support structure for supporting the rear surface of the display unit 151.

The above detailed description should not be construed as limiting in all respects, but should be considered illustrative. The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

100: mobile terminal 110: wireless communication unit
120: input unit 140: sensing unit
150: output unit 160: interface unit
170: memory 180: control unit
181: main board 182: heating components
190: power supply 200: heat dissipation sheet
211: first coating layer 212: second coating layer
220: graphite sheet

Claims (11)

A first body;
A second body disposed parallel to the first body;
A hinge unit connecting the first body and the second body so that an angle formed between the first body and the second body is variable;
A flexible display positioned on one surface of the first body and one surface of the second body;
A main substrate mounted inside the first body and including a heating component;
A battery mounted inside the second body; And
Includes a heat dissipation sheet that is located inside the first body and the second body and absorbs heat of the heating element to diffuse from the first body to the second body,
The heat dissipation sheet
Graphite sheet; And
A mobile terminal comprising a first coating layer and a second coating layer, which are combined by thermocompression bonding on both sides of the graphite sheet. According to claim 1,
At least one of the first coating layer and the second coating layer comprises a polyimide. According to claim 1,
The first coating layer is a mobile terminal characterized in that it comprises a SUS material. According to claim 1,
The heat dissipation sheet is attached to the back of the flexible display, characterized in that to support the flexible display mobile terminal. According to claim 4,
The heat dissipation sheet is a mobile terminal, characterized in that the portion located between the first body and the second body is not attached to the flexible display. According to claim 1,
The graphite sheet is a mobile terminal, characterized in that the opening or slit is formed. According to claim 1,
At least one of the first body and the second body further includes a metal plate located therein,
The heat dissipation sheet is characterized in that the mobile terminal in contact with the metal plate. Laminating a graphite sheet on the first coating layer;
Laminating a second coating layer on the graphite sheet;
Forming a heat dissipation sheet by thermally pressing the first coating layer, the graphite sheet, and the second coating layer; And
Cooling the compressed heat dissipation sheet,
A method of manufacturing a heat dissipation sheet comprising at least one of the first coating layer and the second coating layer comprising polyimide. The method of claim 8,
Method of manufacturing a heat dissipation sheet further comprising the step of forming a slit or an opening in the graphite sheet prior to the step of laminating a graphite sheet on the first coating layer. The method of claim 8,
The thermal compression step
Depositing a stacked structure of the first coating layer, the graphite sheet, and the second coating layer on each layer of a jig having a plurality of layers, respectively; And
A method of manufacturing a heat dissipation sheet comprising the step of thermally compressing a plurality of layers of the jig at the same time. The method of claim 8,
The method of manufacturing a heat dissipation sheet, characterized in that the step of thermal compression is performed under vacuum conditions.

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