WO2019209001A1 - Mobile terminal and manufacturing method therefor - Google Patents

Abstract

Provided is a mobile terminal including a lens module configuring an optical system, wherein the lens module comprises a plurality of lenses arranged in an optical axis direction, a lens barrel including an opening opened in the optical axis direction and having the plurality of lenses mounted therein, and a tolerance-compensating part forming a gap between at least one of the plurality of lenses and the barrel.

Description

Mobile terminal and manufacturing method thereof

The present invention relates to a mobile terminal. Specifically, it is possible to apply to the field to compensate the manufacturing tolerances of the lens and barrel in the camera module included in the mobile terminal.

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 communications, taking pictures and videos through the camera, recording voices, playing music files through the speaker system, and outputting images or videos on the display. 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 functions are diversified, for example, the terminal is implemented in the form of a multimedia player having complex functions such as taking a picture or a video, playing a music or a video file, and receiving a game broadcast.

In order to support and increase the function of such a terminal, it may be considered to improve the structural part and / or the software part of the terminal.

Recently, camera specifications required by mobile terminals have increased. The camera included in the mobile terminal has been developed in such a way that the number of pixels increases, the f value decreases, and the field of view (FOV) increases, and the tolerance level of the lens and barrel required according to the improvement of the camera performance increases. have.

The lens and barrel of the camera included in the mobile terminal are manufactured by plastic injection molding. Generally, cameras have a tolerance level of 5um when high precision is required in the lens and barrel. However, in consideration of portability, the mobile terminal requires a tolerance level of 2 μm or less in a camera included in the mobile terminal. This is a manufacturing tolerance of the lens and barrel There is a problem in that the lens yield can not be secured when assembling the lens and barrel manufactured with a high level of tolerance.

In addition, since the camera included in the mobile terminal must be mass-produced at a small size and low cost, it is difficult to compensate the tolerance by moving the lens after assembly.

An object of the present invention is to compensate for manufacturing tolerances of a lens and a barrel in a camera included in a mobile terminal, which is the aforementioned problem.

In order to achieve the above or another object, the present invention is a mobile terminal provided with a lens module constituting one optical system, according to one aspect, the lens module is a plurality of lenses arranged in the optical axis direction, in the optical axis direction It includes an open opening, and comprises a lens barrel in which the plurality of lenses are mounted, and a tolerance compensator for forming a gap between at least one of the plurality of lenses and the lens barrel.

In addition, according to an aspect of the present invention, the tolerance compensator includes a protrusion protruding in a direction perpendicular to the optical axis direction from at least one side of the plurality of lenses, and perpendicular to the optical axis direction through the projection. It provides a mobile terminal, characterized in that to form the gap in the direction.

In addition, according to an aspect of the present invention, the tolerance compensator includes a protrusion protruding in a direction perpendicular to the optical axis direction from one surface of the lens barrel to face at least one side of the plurality of lenses. It provides a mobile terminal, characterized in that for forming the gap in a direction perpendicular to the optical axis direction through.

In addition, according to an aspect of the present invention, the tolerance compensator provides a mobile terminal, wherein the tolerance of the plurality of lenses is compensated by horizontally moving at least one of the plurality of lenses with respect to another lens.

In addition, according to an aspect of the present invention, the lens barrel includes a step portion for supporting at least one edge of the plurality of lenses in the optical axis direction, and the tolerance compensator has an upper surface or a lower surface of at least one of the plurality of lenses. And a projection protruding in the optical axis direction, wherein the gap is formed in the step portion and the optical axis direction through the projection.

In addition, according to an aspect of the present invention, the lens barrel includes a step portion for supporting at least one edge of the plurality of lenses in the optical axis direction, wherein the tolerance compensator protrudes from the step portion in the optical axis direction. It provides a mobile terminal comprising a projection, and forming the gap in the optical axis direction with at least one of the plurality of lenses through the projection.

In addition, according to an aspect of the present invention, the tolerance compensator provides a mobile terminal, characterized in that to compensate for the combined tolerance of the plurality of lenses by forming a slope with respect to the other lens of at least one of the plurality of lenses. do.

In addition, according to another aspect of the present invention, in the mobile terminal manufacturing method provided with a lens module constituting one optical system, by varying the position of the tolerance compensation unit for forming a gap between at least one of the plurality of lenses and the lens barrel Producing, assembling the plurality of lenses to the lens barrel along the optical axis direction by changing the position of the tolerance compensator, measuring the combined tolerance of the plurality of lenses corresponding to the position of the tolerance compensator, and It provides a method of manufacturing a mobile terminal comprising the step of producing the lens module corresponding to the position of the tolerance compensator to minimize the combination tolerance.

In addition, according to another aspect of the present invention, the step of producing the tolerance compensator at different positions to produce at least one of the plurality of lenses to include a projection protruding in a direction perpendicular to the optical axis direction on one side, It provides a method of manufacturing a mobile terminal, characterized in that for producing at least one of the plurality of lenses by changing the position of the projection.

In addition, according to another aspect of the present invention, the step of producing the tolerance compensating unit in a different position, the lens so as to include a projection protruding in a direction perpendicular to the optical axis direction on one surface to which at least one of the plurality of lenses combine; Producing a barrel, it provides a method for producing a mobile terminal, characterized in that for producing the lens barrel by changing the position of the projection.

In addition, according to another aspect of the present invention, the step of producing by varying the position of the tolerance compensation unit to produce at least one of the plurality of lenses to include a protrusion protruding in the direction of the optical axis in the upper or lower edge, the projection It provides a method of manufacturing a mobile terminal, characterized in that to produce at least one of the plurality of lenses by changing the position of.

Further, according to another aspect of the present invention, the step of producing by varying the position of the tolerance compensator includes a stepped portion for supporting at least one edge of the plurality of lenses in the optical axis direction and the stepped portion in the optical axis direction The lens barrel is produced to include a protruding protrusion, and the lens barrel is produced by changing the position of the protrusion.

The effects of the mobile terminal according to the present invention will be described below.

The present invention can compensate the tolerance by horizontally moving the lens in the camera of the mobile terminal that requires a higher level of tolerance than the manufacturing tolerance of the lens and the lens barrel.

The present invention can compensate the tolerance by tilting the lens in one direction in the camera of the mobile terminal that requires a higher level of tolerance than the manufacturing tolerance of the lens and the lens barrel.

The present invention can provide a manufacturing method for reducing the assembly cost and assembly time for tolerance compensation in a camera of a mobile terminal that requires a higher level of tolerance than the manufacturing tolerance of the lens and lens barrel.

Further scope of the 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 can be clearly understood by those skilled in the art, and therefore, specific embodiments, such as the detailed description and the preferred embodiments of the present invention, are given by way of example only. Should be.

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 an exploded view of a lens module included in a camera of a mobile terminal.

3 and 4 are views for explaining a rotation tolerance compensation method for compensating the manufacturing tolerances of the lens and lens barrel of the conventional lens module.

5 and 6 are views for explaining a horizontal movement tolerance compensation method for compensating manufacturing tolerances of the lens and lens barrel of the lens module, according to an embodiment of the present invention.

FIG. 7 is a diagram for describing a tilt tolerance compensating method for compensating for manufacturing tolerances of a lens and a lens barrel of a lens module, according to an exemplary embodiment.

8 to 10 are diagrams for describing a lens manufacturing frame and a lens manufacturing method for compensating manufacturing tolerances of a lens and a lens barrel of a lens module according to one embodiment 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 are denoted by 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 used to generate an output related to sight, 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 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 (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 user receives a phone call, the user performs a phone call through the wearable device, or when a message is received by the mobile terminal 100, the user receives the received call through the wearable device. It is possible to check the message.

The location information module 115 is a module for 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 on the front, rear, or side surfaces 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 transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. 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 applies a touch (or touch input) applied to the touch screen (or the display unit 151) using at least one of various touch methods such as a resistive film method, a capacitive method, an infrared method, an ultrasonic method, and a magnetic field method. Detect.

As an example, the touch sensor may be configured to convert a change in pressure applied to a specific 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 an image sensor), and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to detect a touch of a sensing 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 endotherm or 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.

As shown, recently, a mobile terminal having a structure in which a front case is omitted while a window 151a positioned at the front of the display unit covers the entire front surface is provided, and a side case 210 is formed to surround a side circumference. You may. The window 151a, the side case 210, and the rear case 102 form an internal space, and in some cases, the 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 case 102 may be detachably coupled to the rear cover for covering the mounted electronic component. Therefore, when the rear cover is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside.

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

The side case 210 of the present invention includes a metal material, and the side case 210 may be used as an antenna radiator. Since a conductive material having a length corresponding to a frequency characteristic of a signal to be transmitted and received should be used, the conductive material may be divided into slits 220 in the middle of the metal side case 210 to form a plurality of conductive members, and the non-metal may be formed on the slits 220. The conductive member can be used as an antenna emitter by filling with a material.

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 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. .

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 manipulation 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, the rear input unit 123c may be provided on the rear surface of the terminal body. The rear input unit 123c is manipulated to receive a command for controlling the operation of the mobile terminal 100, and the input content 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 123c may be implemented in a form capable of input by a touch input, a push input, or a combination thereof.

The rear input unit 123c may be disposed to overlap the front display unit 151 in the thickness direction of the terminal body. For example, the rear input unit 123c may be disposed at an upper end portion of the rear of the terminal body so that the user can easily manipulate the index by using the index finger 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 123c 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), 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 be linked with the display unit 151 to expand the function of the mobile terminal 100. Another example of the accessory may be a touch pen for assisting or extending a touch input to a touch screen.

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

2 is an exploded view of a lens module 300 included in a camera of a mobile terminal.

The lens module 300 constitutes one optical system and may be included in a camera of a mobile terminal.

The lens module 300 includes a plurality of lenses 310 arranged in the optical axis direction A and an opening 321 open in the optical axis direction, and includes a lens barrel 320 in which the plurality of lenses 310 are mounted. can do.

The plurality of lenses 310 may include five or more refractive lenses, and at least one of the five or more refractive lenses may be a glass lens or a plastic lens. The lens module 300 may lower the F value to an appropriate value by having five or more refractive lenses. In addition, the glass lens generally has a higher light transmittance than the plastic lens and thus may increase the transmittance (T value) of the lens module 300 compared to the case where the plurality of lenses 310 are formed using only the plastic lens. Specifically, FIG. 2 illustrates an embodiment in which five lenses 311 to 315 are included in the lens module 300, but the number of lenses included in the lens module 300 is not limited thereto, but is smaller than five. Can be many.

The plurality of lenses 310 may include spherical or aspheric lenses that are axisymmetric lenses. In addition, the plurality of lenses 310 may include a preform lens that is an asymmetric lens. In detail, the plurality of lenses 310 may include at least two preform lenses that are non-axisymmetric lenses. For example, the first lens 311 and the fifth lens 315 may be configured as an axial symmetric lens, and the second lens 312 to the fourth lens 314 may be manufactured as a preform lens that is an asymmetric lens. .

The plurality of lenses 310 may include a spacer 340 having a lens ring shape therebetween. The spacer 340 may serve to form a gap between the plurality of lenses 310, limit a region in which light is induced, and fix a plurality of lenses 310. However, in some cases, the function of the spacer 340 may be replaced by a single layer structure of the lens barrel 320, and some spacers 340 may be omitted.

Light passing through the plurality of lenses 310 may be converted into an electrical signal by the image sensor 330 and transmitted to an image processor (not shown).

3 and 4 are views for explaining a rotation tolerance compensation method for compensating the manufacturing tolerances of the lens and lens barrel of the conventional lens module.

Conventional lens systems use a rotationally symmetric shape with respect to the center of the lens. Initially, spherical lenses were used, but recently, aspherical shapes are used to reduce spherical aberration at high resolution. However, both spherical and aspherical lenses generally have a rotationally symmetrical shape with respect to the axis passing through the lens center. Even if the axisymmetric lens is rotated about the central axis, the lens characteristics do not change.

In general, the number of lenses used in the lens module of the mobile terminal is 4 to 6, and it is common to assemble them so that their optical axes coincide with each other. Theoretically, in the case of aspherical lens, the optical axis coincides when the center of the lens is well aligned. In reality, however, in the case of a lens manufactured by plastic molding, the optical axis of the lens is not exactly centered and slightly deviated by the manufacturing tolerance. Therefore, the optical axes may not coincide even if the lenses are assembled with the correct center. This is called decenter and we have to manage the value in assembly.

In the case of a lens module used for a low resolution (5M or less image sensor) camera, it is possible to cope with the resolution without managing such an eccentric value. However, in case of high resolution (8M or more), the eccentricity value should be managed to 2um or less. To this end, since the axial symmetric lens has no tolerance for rotation between lenses when the lens module is assembled, the eccentricity can be reduced by rotating the lens.

Specifically, FIG. 3 illustrates an embodiment in which the second lens 312 is rotated about the optical axis B to reduce the combination tolerance between the first lens 311 and the second lens 312. In the manufacturing process, the axis center 311a of the first lens 311 may have an eccentricity in the optical axis B, and the axis center 312a of the second lens 312 may also be eccentric in the optical axis B. When simply assembling the first lens 311 and the second lens 312, the center of which is eccentric, the yield according to the eccentricity can be lowered. Therefore, the rotation tolerance may be compensated by rotating the second lens 312 or the first lens 311. Here, the characteristics of the lens may not change even when the first lens 311 and the second lens 312 are rotated by the axisymmetric lens. Alternatively, the first lens 311 may be an axisymmetric lens, and the second lens 312 may be an asymmetric lens.

Specifically, FIG. 4 illustrates an embodiment in which the first lens 311 and the second lens 312 are assembled to the lens barrel 320 and rotated to compensate for the tolerance described with reference to FIG. 3. Doing. The second lens 312 may be assembled to the lens barrel 320 by rotating based on the first lens 312 and the reference line C. The first lens 312 may also be assembled to the lens barrel 320 at an appropriate angle while rotating to minimize the combination tolerance in consideration of the manufacturing tolerances of the lens barrel 320 and the first lens 311.

3 and 4 illustrate a method of compensating for a rotational tolerance between two lenses, but when the number of lenses increases, the number of cases of compensating for the combined tolerance may increase. For example, the second lens 312 is rotated 30 degrees relative to the first lens 311, the third lens 313 is rotated −10 degrees, the fourth lens 314 is rotated 25 degrees, and the fifth lens is rotated. The combination rotated by -60 degrees can minimize the combination tolerance. In this case, the lens module 300 may be manufactured to assemble a plurality of lenses in the above combination.

5 and 6 are views for explaining a horizontal movement tolerance compensation method for compensating manufacturing tolerances of the lens and lens barrel of the lens module, according to an embodiment of the present invention.

The rotation tolerance compensation method described above has a disadvantage in that it is difficult to apply the preform lens. In addition, the method of compensating the tolerance by rotating may maintain the eccentric state and thus limit the tolerance compensation.

Preform lenses are asymmetric lenses. Therefore, when one preform lens is rotated in the lens module including a plurality of preform lenses, the performance change of the lens module may be large. That is, the lens module including a plurality of preform lenses needs to be coupled to the lens barrel with a plurality of preform lenses so that rotational tolerances between the plurality of preform lenses do not occur.

Specifically, FIG. 5 illustrates a first lens 311 that is an axisymmetric lens, a second lens 312 that is a preform lens, and a third lens 313. The alignment direction of the second lens 312 is determined in relation to the third lens 313. Thus, although the second lens 312 and the third lens 313 may rotate in the same direction at the same time, each of them rotates separately to compensate for the tolerance.

Accordingly, the present invention intends to propose a horizontal movement tolerance compensation method rather than a rotation tolerance compensation.

In order to compensate for the horizontal movement tolerance, the lens module 320 is moved by moving at least one of the second lens 312 and the third lens 313 in a first direction s1 and a second direction s2 on a plane without rotation. Can be assembled in

In order to compensate for horizontal movement tolerance, the present invention provides a mobile terminal having a lens module constituting an optical system, wherein the lens module includes a plurality of lenses arranged in an optical axis direction and an opening opened in the optical axis direction. The lens barrel may include a lens barrel in which a plurality of lenses are mounted, and a tolerance compensator forming a gap between at least one of the plurality of lenses and the barrel.

The tolerance compensator may include a protrusion protruding in a direction perpendicular to the optical axis direction from at least one side of the plurality of lenses, and may form the gap in the direction perpendicular to the optical axis direction through the protrusion. The tolerance compensator may compensate for the combined tolerance of the plurality of lenses by horizontally moving at least one of the plurality of lenses with respect to the other lens.

The tolerance compensator may include a protrusion protruding in a direction perpendicular to the optical axis direction from one surface of the lens barrel to face at least one side of the plurality of lenses, and the gap in the optical axis direction through the protrusion. Can be formed. The tolerance compensator may compensate for the combined tolerance of the plurality of lenses by horizontally moving at least one of the plurality of lenses with respect to the other lens.

In detail, FIG. 6 illustrates an embodiment in which a tolerance compensator 400 is provided in the third lens 313 to compensate for horizontal movement tolerance. 6A illustrates the second lens 312 that does not include the tolerance compensator 400. FIG. 6B illustrates a third lens 313 including a tolerance compensator 400 on one side thereof. The tolerance compensator 400 may be provided at a predetermined angle with respect to the reference line C. The tolerance compensator 400 may be provided at various angles with respect to the reference line C. FIG. FIG. 6C illustrates an optical axis cross section of the lens module in which the second lens 312 and the third lens 313 are assembled to the lens barrel 320. The third lens 313 is spaced apart from one surface of the lens barrel 312 by the tolerance compensator 400, and may be manufactured to lower the combination tolerance of the second lens 312 through horizontal movement. The second lens 312 and the third lens 131 may be axisymmetric lenses or non-axisymmetric lenses. In some cases, the second lens 312 may also include a tolerance compensator 400, and the tolerance compensator 400 is located at a different position (angle) from the tolerance compensator 400 of the third lens 313. It may be provided.

The tolerance compensator 400 may be used to compensate for the combined tolerance by forming an inclination in the third lens 313. In this regard, FIG. 7 is described below.

FIG. 7 is a diagram for describing a tilt tolerance compensating method for compensating for manufacturing tolerances of a lens and a lens barrel of a lens module, according to an exemplary embodiment.

The tilt tolerance compensation method is a method in which a plurality of lenses are arranged in the optical axis direction, and at least one lens of the plurality of lenses is tilted relative to the optical axis or other lenses to compensate for the combined tolerance.

To this end, the present invention includes a stepped portion for supporting the edge of at least one of the plurality of lenses in the optical axis direction on the lens barrel 320, the tolerance compensation unit in the optical axis direction on the top or bottom of at least one of the plurality of lenses The protrusion may include a protrusion, and the gap may be formed in the step direction and the optical axis through the protrusion.

Specifically, FIG. 7A illustrates a second lens 312 that does not include the tolerance compensator 400. FIG. 7B illustrates the third lens 313 including the tolerance compensator 400 on the edge upper surface. The tolerance compensator 400 may be provided at a position forming a predetermined angle with respect to the reference line C, and the position may be variously manufactured according to the angle. FIG. 7C illustrates an optical cross section of the lens module in which the second lens 312 and the third lens 313 are assembled to the lens barrel 320. That is, the third lens 313 may be spaced apart from the step portion 322 of the lens barrel 312 by the tolerance compensator 400, and may form an inclination with respect to the optical axis or another lens. The second lens 312 and the third lens 131 may be axisymmetric lenses or non-axisymmetric lenses. In some cases, the second lens 312 may also include a tolerance compensator 400 on one side, an upper side, and a lower surface, and may be positioned at a different position (angle) from the tolerance compensator 400 of the third lens 313. Tolerance compensation unit 400 may be provided. In some cases, the tolerance compensator 400 may include a protrusion protruding from the stepped portion 322 in the optical axis direction, and form a gap in the optical axis direction with at least one of the plurality of lenses through the protrusion. Can be. That is, the tolerance compensator 400 may compensate for the combined tolerance of the plurality of lenses by forming a slope of one of the plurality of lenses with respect to the other lens.

8 to 10 are diagrams for describing a lens manufacturing frame and a lens manufacturing method for compensating manufacturing tolerances of a lens and a lens barrel of a lens module according to one embodiment of the present invention.

In general, four to five lenses are used for a camera of a mobile terminal, and at least one lens is manufactured by plastic injection. The lens injection mold may include a plurality of injection molds to manufacture a plurality of lenses of the same design. However, even a lens of the same design may have a different tolerance depending on the injection mold to be manufactured. That is, lenses manufactured in the same injection mold may have similar tolerances, but lenses manufactured in different injection molds may have different tolerances. Therefore, the combination tolerance of the lens assembled to the lens module may differ depending on the injection mold. For example, in the lens module assembled with three lenses, the first lens is used in the first injection mold of the first injection mold for manufacturing the first lens, the second lens is used for manufacturing the second lens Second Injection Mold Increase When the lens module is assembled using the one manufactured from the second injection mold and the third lens is manufactured from the fifth injection mold of the third injection mold that manufactures the third lens, the combination tolerance is increased. Can be minimal. In this case, mass production of the lens module may then proceed in the above combination.

According to the present invention, the number of combinations may be increased to a more precise level through injection molds having different positions of the tolerance compensator 400. To this end, the present invention is a method of manufacturing a mobile terminal equipped with a lens module constituting one optical system, comprising the steps of: producing a tolerance compensator forming a gap between at least one of the plurality of lenses and the lens barrel at different positions, Assembling the plurality of lenses to the lens barrel along the optical axis direction by changing the position of the tolerance compensator, measuring a combined tolerance of the plurality of lenses corresponding to the position of the tolerance compensator, and minimizing the combined tolerance And producing the lens module corresponding to the position of the tolerance compensator.

In this case, the step of producing the tolerance compensator by varying the position to produce at least one of the plurality of lenses to include a projection protruding in a direction perpendicular to the optical axis direction on one side, by varying the position of the projection At least one of the plurality of lenses may be produced.

In addition, the step of producing the tolerance compensator by varying the position to produce the lens barrel to include a projection protruding in a direction perpendicular to the optical axis direction on one surface to which at least one of the plurality of lenses are coupled, The lens barrel may be produced by changing a position.

In addition, the step of producing the tolerance compensator at different positions may include producing at least one of the plurality of lenses to include protrusions protruding in the optical axis direction from an upper or lower edge of the edge compensator, and changing the positions of the protrusions. It may be characterized by producing at least one of the lenses.

In addition, the step of producing the tolerance compensator in a different position includes a step portion for supporting the edge of at least one of the plurality of lenses in the optical axis direction, the step so that the step includes a projection protruding in the optical axis direction Producing a lens barrel, it may be characterized in that for producing the lens barrel by changing the position of the projection.

Hereinafter, a method of producing at least one of the plurality of lenses to include projections protruding in a direction perpendicular to the direction of the optical axis in one side in the step of producing by varying the position of the tolerance compensator through FIGS. 8 to 10. Look specifically.

8 illustrates an injection mold 510 for producing a plurality of lenses of the same design and a holder 520 for holding the injection mold 510 to include protrusions protruding from one side of the lens. The holder 520 may be inserted by rotating the injection mold 510, and may include a groove 521 forming the protrusion in one direction.

FIG. 9A illustrates an embodiment of injecting a lens including the protrusion at a zero degree angle in the first mold of the injection mold 510. The position 521a of the groove may be positioned at a zero degree angle in the first mold, and the lens formed in the first mold may include a protrusion that is the tolerance compensator 400 at the zero degree angle. Specifically, FIG. 9 (b) shows the first lens 310 produced by the first mold of FIG. 9 (a), and the first lens 310 produced by the first mold has a reference line C on one side. The tolerance compensation unit 400 may be included at an angle of 0 degrees based on the reference value. If the injection mold 510 includes a mold for each angle of 30 degrees, the lens produced in the second mold may include a tolerance compensator 400 on one side at an angle of 30 degrees with respect to the reference line C.

10A illustrates an embodiment in which the lens is injected by rotating the injection mold 510 by 30 degrees. In FIG. 10, unlike FIG. 9, the first lens 310 produced in the first mold may include a tolerance compensator 400 on one side at an angle of 30 degrees with respect to the reference line C. That is, since the injection mold 510 producing lenses of the same design produces lenses having different tolerances in each mold, it is necessary to produce different positions of the tolerance compensator 400 in each mold. To this end, the injection mold 510 may be rotated to produce a different position of the tolerance compensator 400. That is, the present invention may compensate for the combination tolerance by changing the position of the tolerance compensator 400 in each lens in addition to the combination of the lenses produced in each of the injection mold 510. For example, the first lens is produced in the first mold and includes a tolerance compensator 400 at a zero degree angle, the second lens is produced in a fourth mold, and a tolerance compensator 400 at a -30 degree angle. ), And the third lens is produced in the fifth mold, but when the tolerance includes the tolerance compensation unit 400 at an angle of 180 degrees, the combination tolerance is the smallest. Then, the lens module may produce the lens module in the combination.

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

Claims (12)

In a mobile terminal having a lens module constituting one optical system, the lens module A plurality of lenses arranged in the optical axis direction; A lens barrel including an opening opened in the optical axis direction and in which the plurality of lenses are mounted; And And a tolerance compensator forming a gap between at least one of the plurality of lenses and the barrel. The method of claim 1, The tolerance compensator A protrusion protruding in a direction perpendicular to the optical axis direction from at least one side of the plurality of lenses, And the gap is formed in the direction perpendicular to the optical axis direction through the projection. The method of claim 1, The tolerance compensator And a protrusion protruding from one surface of the lens barrel in a direction perpendicular to the optical axis direction to face at least one side of the plurality of lenses, And the gap is formed in the optical axis direction through the projection. The method according to claim 2 or 3, The tolerance compensator And at least one of the plurality of lenses is horizontally moved relative to another lens to compensate for the combined tolerance of the plurality of lenses. The method of claim 1, The lens barrel It includes a step portion for supporting at least one edge of the plurality of lenses in the optical axis direction, The tolerance compensator A projection protruding in the optical axis direction from an upper surface or a lower surface of at least one of the plurality of lenses, A mobile terminal, characterized in that for forming the gap in the direction of the step portion and the optical axis through the projection. The method of claim 1, The lens barrel It includes a step portion for supporting at least one edge of the plurality of lenses in the optical axis direction, The tolerance compensator It includes a protrusion protruding from the step portion in the optical axis direction, And the gap is formed in the optical axis direction with at least one of the plurality of lenses through the projections. The method according to claim 5 or 6, The tolerance compensator And at least one of the plurality of lenses forms an inclination with respect to another lens to compensate for the combined tolerance of the plurality of lenses. In the mobile terminal manufacturing method provided with a lens module constituting one optical system, Producing a tolerance compensator for forming a gap between at least one of the plurality of lenses and the lens barrel at different positions; Assembling the plurality of lenses to the lens barrel along an optical axis direction by changing positions of the tolerance compensator; Measuring a combination process of the plurality of lenses in correspondence with the position of the tolerance compensator; And And producing the lens module corresponding to the position of the tolerance compensator where the combination tolerance is minimal. The method of claim 8, Producing the tolerance compensator in different positions Producing at least one of the plurality of lenses to include a projection protruding in a direction perpendicular to the optical axis direction on one side, And producing at least one of the plurality of lenses by varying the position of the protrusions. The method of claim 8, Producing the tolerance compensator in different positions Producing the lens barrel to include a projection protruding in the direction of the optical axis and the manual direction on one surface coupled to at least one of the plurality of lenses, And producing the lens barrel by changing the position of the protrusions. The method of claim 8, Producing by varying the position of the tolerance compensator Producing at least one of the plurality of lenses to include a projection protruding in the optical axis direction on the upper or lower edge, And producing at least one of the plurality of lenses by varying the position of the protrusions. The method of claim 8, Producing the tolerance compensator in different positions Producing the lens barrel to include a step portion for supporting the edge of at least one of the plurality of lenses in the optical axis direction, and to include a projection protruding in the optical axis direction in the step portion, And producing the lens barrel by changing the position of the protrusions.

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