KR20190087261A - Camera and mobile terminal having the same - Google Patents

Abstract

The present invention relates to a camera and a mobile terminal having the same. The mobile terminal of the present invention comprises: a window; and a camera disposed at a lower side of the window. The camera of the present invention comprises: an imaging lens system including a plurality of lenses; and an image sensor disposed to overlap the imaging lens system to capture an external image transmitting the imaging lens system. The imaging lens system includes at least one asymmetric lens to allow incident light to be offset in one direction to reach the image sensor.

Description

[0001] CAMERA AND MOBILE TERMINAL HAVING THE SAME [0002]

The present invention relates to a camera having an imaging lens system and a mobile terminal using the same.

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

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

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In addition to the above attempts, recent mobile terminals have endeavored to minimize the size of the upper bezel. In this case, if the upper bezel is narrowed, the size of the image sensor must be reduced as well, which causes a reduction in resolution. Therefore, consideration can be made of a new mechanism that can maintain the size of the image sensor while the size of the upper bezel is small.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to apply a high-resolution lens while reducing the size of a bezel region in a mobile terminal. Another object of the present invention is to realize a camera in which the center of the image sensor and the incident light are decentered.

According to an aspect of the present invention, a preform lens is applied to a camera and a center of an image sensor is moved downward to implement a narrow bezel of a mobile terminal.

As a more specific example, the mobile terminal includes a window and a camera disposed under the window, the camera including: an imaging lens system having a plurality of lenses; and an imaging device for imaging an external image transmitted through the imaging lens system The imaging lens system may include at least one asymmetric lens so that incident light is offset in one direction to reach the image sensor.

According to an aspect of the present invention, the imaging lens system includes a first lens facing a lower surface of the window, a final lens adjacent to the image sensor, and a plurality of asymmetric intermediate lenses disposed between the first lens and the final lens Respectively.

The incident surface of the first lens may be a rotationally symmetric surface. A stop of the incident light may be formed in front of the incident surface of the first lens. And the outgoing surface of the first lens may have a convex surface whose lower portion is convex than the upper portion.

According to an aspect of the present invention, the asymmetric intermediate lenses include at least one convex lens having an incident surface and an outgoing surface both having a convex surface shape.

The convex lens is an asymmetric lens decentered in the one direction, and the convex lens has a de-center value of the exit surface larger than a de-center value of the incident surface. And the convex lens has a largest difference in de-center value between the exit surface and the entrance surface as compared with the other lenses.

According to an aspect of the present invention, the asymmetric intermediate lenses may include a second lens disposed between the convex lens and the first lens, the incident surface having a convex surface shape, and the emitting surface having a concave surface shape.

According to an aspect of the present invention, the asymmetric intermediate lenses are disposed between the convex lens and the final lens, and include a tilt lens having a shape tilted with respect to a direction perpendicular to the one direction. And the tilt angle of the incident surface and the exit surface of the tilt lens are different from each other.

According to an aspect of the present invention, the final lens has a longer length on the lower side with respect to both ends of the first lens. The final lens may have an asymmetric surface represented by a Zernike polynomial function to correct aberration and distortion of light transmitted through the first lens and the asymmetric intermediate lens.

According to an aspect of the present invention, the center of the image sensor may have an offset with respect to a center of light incident on the imaging lens system.

According to an aspect of the present invention, a display is disposed on the lower side of the window, and at least a part of the camera module may overlap with the display in a thickness direction of the window. The barrel of the imaging lens system may be formed so that its width gradually decreases toward the window.

According to another aspect of the present invention, there is provided a display device comprising: a window having a light-transmitting region and a bezel region surrounding the light-transmitting region; a camera window formed in the bezel region; a display disposed below the light- And an image sensor that is offset in a direction away from the bezel region with respect to the camera window, wherein the image sensor is disposed on the lower side of the camera window, And the imaging lens system includes a plurality of preform lenses so that the offset can be achieved.

According to an aspect of the present invention, the preform lenses may have exit surfaces decentered in one direction.

According to another aspect of the present invention, there is provided an imaging system comprising: an imaging lens system including a plurality of lenses; and an image sensor disposed so as to overlap with the imaging lens system to image an external image transmitted through the imaging lens system, And at least one asymmetric lens decentered in one direction to reach the image sensor.

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

According to at least one of the embodiments of the present invention, the center of the image sensor with respect to the incident light can be eccentric through the arrangement of asymmetric lenses. Thus, the size of the upper bezel of the mobile terminal can be shortened.

Also, the structure of moving the center of the image sensor to the lower side of the mobile terminal can maintain the size of the bezel even when a large size image sensor is applied. Thus, a camera having a high resolution can be applied without enlarging the size of the bezel in the mobile terminal.

In addition, since the image-forming lens system of the camera has a preform lens, the image-forming system realizes a non-shrinking structure, and the position of the lens can be adjusted by this.

1A is a block diagram illustrating a mobile terminal according to the present invention.
1B and 1C are conceptual diagrams showing an example of a general mobile terminal in different directions.
2 is a front view of a mobile terminal according to the present invention.
3 is a conceptual diagram illustrating a concept of shrinking a bezel area using a new camera structure.
4 is a side cross-sectional view of a mobile terminal according to the present invention.
Figure 5 is an enlarged view of the camera of Figure 3;
6 and 7 are conceptual diagrams showing the concept of tilt and decenter.
8 is a conceptual diagram showing the progress of light in the imaging lens system of Fig.
Fig. 9 is a graph showing the shift of the lens surface de center value with respect to the internal position of the optical system.
10 is a graph showing the length of a ray passing through the lower portion of the contrast of the lens.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or similar components are denoted by the same reference numerals, and redundant explanations thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

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

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

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

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

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

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

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

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

Next, the input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. For inputting image information, Or a plurality of cameras 121 may be provided. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170. [ A plurality of cameras 121 provided in the mobile terminal 100 may be arranged to have a matrix structure and various angles or foci may be provided to the mobile terminal 100 through the camera 121 having the matrix structure A plurality of pieces of image information can be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire a left image and a right image for realizing a stereoscopic image.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output unit 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output unit 152 may include a receiver, a speaker, a buzzer, and the like.

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

In addition to vibration, the haptic module 153 may be configured to perform various functions such as a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 153 can transmit the tactile effect through the direct contact, and the tactile effect can be felt by the user through the muscles of the finger or arm. The haptic module 153 may include two or more haptic modules 153 according to the configuration of the mobile terminal 100.

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

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

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

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM) A universal subscriber identity module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the interface unit 160. [

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

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

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

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

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

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components. The power supply unit 190 includes a battery, the battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

On the other hand, a system capable of maintaining a high-resolution camera while reducing the size of a bezel area can be applied to the mobile terminal. Specifically, to implement the narrow bezel, a low-resolution sensor having a small size is used instead of a conventional high-resolution sensor. However, when the camera of the present invention is used, a Narrow bezel can be realized while using a high-resolution sensor.

Hereinafter, a mobile terminal 100 having a camera according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a front view of a mobile terminal according to an embodiment of the present invention, FIG. 3 is a conceptual view illustrating a concept of shrinking a bezel area using a new camera structure, and FIG. 4 is a side cross- . 2 to 4, it can be seen that the size of the upper bezel is reduced by arranging the camera of the present invention at the upper end of the front side of the mobile terminal.

Hereinafter, a method for reducing the size of the upper bezel of the mobile terminal will be described with reference to FIGS. 2 to 4. FIG.

2 to 4 are views for explaining the arrangement of the camera 121a according to an embodiment of the present invention. 4, a mobile terminal according to an exemplary embodiment of the present invention includes a window 151a formed on an outermost surface thereof, a display 151b disposed on a rear surface of the window 151a and displaying a video signal, And a front case 101 on which the window 151a and the display 151b are mounted and which forms a part of the appearance in a state where the window 151a and the display 151b are seated.

The front case 101 may be a frame disposed under the window 151a, and the window 151a may form a front surface of the terminal body. The window 151a may be formed of tempered glass. However, the present invention is not limited thereto, and other materials such as a synthetic resin may be used as long as the transparent material can transmit visual information while covering the display.

The camera 121a disposed on the back surface of the front case 101 is configured to photograph an image incident through the window 151a. Therefore, the camera 121a may be a front camera. The camera 121a is disposed in a camera hole 1211 formed in the front case 101 and a flow prevention rib 1213 protrudes around the camera hole 1211. [

The camera 121a is disposed on the lower side of the window. For example, the window 151a may be divided into a light transmitting region 1511 for outputting an image and an edge region 1512 surrounding the light transmitting region 1511. The camera 121a may be provided in the edge region 1512 So that it can be mostly covered. The edge region 1512 may be an opaque region formed on the rear surface of the window 151a by printing or the like. Accordingly, the edge region 1512 is formed to be impermeable. However, the edge region 1512 may include a camera window 1213 to allow light to be transmitted to the camera 121a. The camera window 1213 may be a light-transmissive portion located in the edge region 1512 and may not be printed or the like.

The camera window 1213 may have a circular shape and the camera window 1213 may be concentric with the incident surface of the camera 121a. According to an embodiment of the present invention, the camera 121a can control the optical path by introducing a preform lens. That is, as shown in the figure, the camera 121a may be configured to move the incident light downward so as to take an image or an image. That is, the optical path from the camera 121a can be bent downward. According to this structure, the position of the preform lens of the camera 121a can be moved to the upper side of the terminal, and thus the bezel area can be reduced .

Hereinafter, the camera described above will be described in more detail.

FIG. 5 is an enlarged view of the camera of FIG. 3, FIGS. 6 and 7 are conceptual diagrams showing the concept of tilt and decenter, FIG. 9 is a conceptual diagram of light progression in the imaging lens system of FIG. 10 is a graph showing the length of a ray passing through the lower portion of the lens contrast.

4 to 8, the camera 121a may include an imaging lens system 1220 and an image sensor 1230. [

The imaging lens system 1220 includes a plurality of lenses 1221, 1222, 1223, 1224 and 1225. The plurality of lenses 1221, 1222, 1223, 1224 and 1225 are combined with each other to form an image And forms an image on the image sensor 1230. In this case, the image sensor 1230 may be disposed to overlap with the imaging lens system 1220 to capture an external image transmitted through the imaging lens system 1220.

The incident surface of the camera 121a described above may be an incident surface of the imaging lens system. More specifically, the incident surface of the camera 121a may be an incident surface 1221a of the first lens 1221 of the imaging lens system 1220 provided in the camera 121a. As another example, the incident surface of the camera 121a may be the front surface of the barrel 1240 that supports the imaging lens system 1220.

Unlike the incident surface of the imaging lens system 1220, the exit surface of the imaging lens system is eccentric downward with respect to the center of the camera window 1213. Here, the lower side indicates a direction away from the upper end of the terminal. As described above, in the present invention, the imaging lens system 1220 may include at least one asymmetric lens 1221, 1222, 1223, 1224, 1225 so that incident light is offset in one direction to reach the image sensor 1230 . The image sensor 1230 may have an offset with respect to an incident surface of the imaging lens system 1220 in a direction away from the bezel area with respect to the camera window 1213. The imaging lens system 1220 may include a plurality of preform lenses so that the offset can be achieved. That is, the asymmetric lenses 1221, 1222, 1223, 1224, and 1225 may be preform lenses, so that the camera has a mechanism in which the center of the incident light and the center of the image sensor are not located on a straight line.

In the mobile terminal, the size of the image sensor increases with the resolution of the camera, and the size of the bezel area also increases. In this case, in order to reduce the size of the bezel, the aperture size of the lens module must be reduced. However, there is a limit in reducing the aperture size in a mobile camera requiring a high resolution and a short overall length. In order to solve such a problem, in this example, the structure of the image-forming lens system in which the center of the incident light and the center of the image sensor are eccentric is proposed, and a decenter, tilt and free- The above-described imaging lens system is implemented using a non-condensing lens.

More specifically, the imaging lens system 1220 includes a first lens 1221 that faces a lower surface of the window 151a, and a final lens 1225 that is adjacent to the image sensor 1230. In this case, at least one of the first lens 1221 and the last lens 1225 may be an asymmetric lens. The imaging lens system 1220 may include a plurality of asymmetric intermediate lenses 1222, 1223, and 1224 disposed between the first lens 1221 and the final lens 1225.

In this case, at least some of the lenses may be tilted from the incident surface and the exit surface. Here, tilting means that the surface tangent to the center of the lens tilts with respect to the optical axis (see Fig. 6 (a)), or that the central surface of the exit surface and the exit surface of the lens are not parallel 6 (b)).

Also, at least some of the lenses may have a center. Here, having a center means that the central axis of a certain lens is not on the same line as the center axis of another lens or the center of the sensor (see Fig. 7 (a)). In other words, having a center can mean that the exit surface of the same lens and the central axis of the incident surface are not on the same line (see Fig. 7 (b)).

Hereinafter, a structure of the lenses of the imaging lens system 1220 having the tilt and decenter will be described in more detail with reference to FIGS. 5, 8, 9, and 10. FIG.

First, the incident surface 1221a of the first lens 1221 may be a rotationally symmetric surface. The incident surface 1221a of the first lens 1221 faces the lower surface of the window 151a and can be exposed to the outside through the camera window 1213. [ The incident surface 1221a of the first lens 1221 is a rotationally symmetric surface different from the other portions of the imaging lens system 1220 as a reference surface of an image incident on the imaging lens system 1220. In this case, a stop of the incident light may be formed in front of the incident surface 1221a of the first lens 1221 in the camera 121a.

On the other hand, the outgoing surface 1221b of the first lens 1221 has a convex surface with a lower convex surface than the upper surface. More specifically, the exit surface 1221b of the first lens 1221 has a convex surface shape, is centered in the (-) direction in the Y-axis direction, and is tilted at (-) angle with respect to the X-axis. Here, the X axis and the Y axis are perpendicular to each other and are perpendicular to the central axis of the incident surface 1221a of the first lens 1221. The X axis direction means a horizontal direction and the Y axis direction means a vertical direction do.

In addition, the first lens 1221 has a structure that is wider than the upper side, and has a structure in which the path of each light beam travels in the -y direction, that is, the lower side in comparison with the rotationally symmetric structure. The light passing through the imaging lens system 1220 is offset in the -y direction to reach the center of the image sensor 1230 and the exit surface 1221b of the first lens 1221 contributes to a part of the light path formation .

According to the illustrated example, the asymmetric intermediate lenses 1222, 1223, and 1224 may include at least one convex lens 1223 having both convex and concave surfaces. In this example, the convex lens 1223 may be a lens positioned in the middle of the imaging lens system 1220.

The convex lens 1223 is an asymmetric lens decentered in the Y axis direction and the convex lens 1223 is formed so that the center value of the exit surface 1223b is larger than the center value of the incident surface 1223a . Also, the convex lens 1223 has the largest thickness as compared with the remaining lenses, and can be a lens having the largest power. For this, the convex lens 1223 may be a lens having the largest difference between the center-of-gravity values of the exit surface 1223b and the incident surface 1223a with respect to the remaining lenses.

In addition, the asymmetric intermediate lenses in this example may include a second lens 1222 disposed between the convex lens 1223 and the first lens 1221. The second lens 1222 may be a lens having a convex-shaped entrance surface 1222a and a concave-shaped exit surface 1222b. In this case, the convex surface has a positive radius of curvature and may have a de-center value in the negative direction. The exit surface 1221b of the first lens 1221 has a convex surface that is convex more downward than the upper surface and the exit surface 1221b of the first lens 1221 and the entrance surface 1221b of the second lens 1222 1222a may be gradually narrowed in the -y direction.

On the other hand, the concave surface of the second lens 1222 has a negative radius of curvature and can have a decentering value in a (-) direction substantially similar to the convex surface. In this case, the negative radius of curvature of the concave surface may be larger than the positive radius of curvature of the incident surface 1223a of the intermediate lens 1223. The maximum distance between the entrance surface 1223a of the intermediate lens 1223 and the exit surface 1222b of the second lens 1222 may be located below the center axis of the imaging lens system.

Also, the asymmetric intermediate lenses are disposed between the convex lens 1223 and the final lens 1225, and the tilting lens 1225 having a shape tilted with respect to a direction perpendicular to the Y-axis direction (i.e., a horizontal axis) 1224). In this example, the imaging lens system 1220 can be formed by combining the first lens 1221, the second lens 1222, the intermediate lens 1223, the tilting lens 1224, and the final lens 1225. That is, although the imaging lens system 1220 may be composed of five preform lenses, the present invention is not limited thereto, and the number of the preform lenses may be different.

For example, the tilt lens 1224 may be a lens having a different tilt angle between the incident surface 1224a and the emitting surface 1224b. The tilt lens 1224 has a larger tilt value than other lenses and can be made so that the (-) direction tilt value of the incident surface is larger than the (-) direction tilt value of the exit side.

Finally, the final lens 1225 may be a lens having a shorter length on the lower side with respect to both ends of the first lens 1221. The length of the lenses may gradually become longer from the first lens 1221 to the last lens 1225.

The final lens 1225 may have an asymmetric surface represented by a Zernike polynomial function to correct aberrations and distortion of light transmitted through the first lens 1221 and the asymmetric intermediate lenses 1122, 1123, and 1124. That is, the final lens 1225 has a complicated shape and a large asymmetry in order to finally correct the aberration and distortion of light traveling from the first lens 1221 to the tilt lens 1224 . However, the present invention is not limited thereto, and other lenses may have an asymmetric surface represented by a Zernike polynomial function.

Thus, in this example, the center of the image sensor 1230 through the non-axial lens using the tilt, decenter and free-form curved surface implements a camera having an offset relative to the center of the light incident on the imaging lens system 1220 do.

Meanwhile, in order to realize the offset, the imaging lens system 1220 is configured such that the slope of the virtual line connecting the lower end of the imaginary line connecting the upper ends of the lenses is larger. With this structure, at least a part of the camera 121a may have a structure in which it overlaps with the display 151b in the thickness direction of the window 151a.

For example, referring to FIG. 4, the barrel 1240 of the imaging lens system 1220 may be formed to have a gradually narrower width toward the window 151a. The end of the display 151b is disposed at the narrowed portion, and the size of the display 151b can be enlarged.

As described above, the camera of the present invention is applied to a mobile terminal, and a mechanism for improving camera resolution while minimizing a bezel area has been described. However, the camera of the present invention is not limited thereto, and can be applied to other products using cameras as well as mobile terminals.

The foregoing detailed description should not be construed in all aspects as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (20)

window; And
And a camera disposed on the lower side of the window,
The camera comprises:
An imaging lens system having a plurality of lenses; And
And an image sensor disposed so as to overlap with the imaging lens system to pick up an external image transmitted through the imaging lens system,
Wherein the imaging lens system comprises at least one asymmetric lens so that incident light is offset in one direction to reach the image sensor. The method according to claim 1,
The imaging lens system includes:
A first lens facing a lower surface of the window;
A final lens adjacent to the image sensor; And
And a plurality of asymmetric intermediate lenses disposed between the first lens and the last lens. 3. The method of claim 2,
Wherein the incidence surface of the first lens is a rotationally symmetrical surface. The method of claim 3,
Wherein a stop of the incident light is formed in front of an incident surface of the first lens in the camera. The method of claim 3,
Wherein the emergent surface of the first lens is a convex surface whose lower portion is convex than the upper portion. 3. The method of claim 2,
Wherein the asymmetric intermediate lenses include at least one convex lens having an incident surface and an emergent surface both having a convex surface shape. The method according to claim 6,
Wherein the convex lens is an asymmetric lens decentered in the one direction,
Center value of the exit surface is larger than a de-center value of the incident surface. 8. The method of claim 7,
Wherein the difference in de-center value between the exit surface and the entrance surface of the convex lens is larger than that of the other lenses. The method according to claim 6,
Wherein the asymmetric intermediate lenses are disposed between the convex lens and the first lens, and the second lens has an incident surface of a convex shape and an emission surface of a concave shape. The method according to claim 6,
Wherein the asymmetric intermediate lenses are disposed between the convex lens and the final lens and include a tilt lens having a shape tilted with respect to a direction perpendicular to the one direction. 11. The method of claim 10,
Wherein the tilt lens has a different tilt angle between an incident surface and an output surface. 3. The method of claim 2,
Wherein the final lens is longer on the lower side with respect to both ends of the first lens. 13. The method of claim 12,
Wherein the final lens has an asymmetric surface represented by a Zernike polynomial function so as to correct aberration and distortion of light transmitted through the first lens and the asymmetric intermediate lens. The method according to claim 1,
Wherein a center of the image sensor has an offset relative to a center of light incident on the imaging lens system. The method according to claim 1,
A display is disposed on the lower side of the window,
Wherein at least a part of the camera module overlaps with the display in a thickness direction of the window. 16. The method of claim 15,
Wherein the barrel of the imaging lens system is formed so that its width gradually decreases toward the window. A window having a light-transmitting region and a bezel region surrounding the light-transmitting region;
A camera window formed in the bezel region;
A display disposed below the light-transmitting region; And
And a camera at least partially overlapping the display in the thickness direction of the window,
The camera comprises:
An imaging lens system disposed below the camera window; And
And an image sensor offset in a direction away from the bezel area with respect to the camera window,
Wherein the imaging lens system comprises a plurality of preform lenses so that the offset can be achieved. 18. The method of claim 17,
Wherein the preform lenses have exit surfaces decentered in one direction. An imaging lens system having a plurality of lenses; And
And an image sensor disposed so as to overlap with the imaging lens system to pick up an external image transmitted through the imaging lens system,
Wherein the imaging lens system comprises at least one asymmetric lens that is decentered in one direction so that incident light is offset in one direction to reach the image sensor. 20. The method of claim 19,
Wherein the asymmetric lens includes at least one convex lens having an incident surface and an emergent surface both having a convex surface shape.

Images