KR20140024530A - Mobile terminal - Google Patents

Abstract

A case in which an electronic component is mounted therein and a through-window is formed on a front surface thereof; A glass window inserted into the through window; A first layer formed around a rear surface of the glass window to implement a color of the bezel; A second layer formed on a rear surface of the first layer and having a low light transmittance in a visible light region and a high light transmittance in an infrared region; And a near-infrared sensor positioned on the rear surface of the second layer, even when using a bezel of a bright color such as white, it is not necessary to form an opening for the near-infrared sensor, thereby increasing the unity of the front design of the mobile terminal. .

Description

[0001] MOBILE TERMINAL [0002]

The present invention relates to a mobile terminal having a bezel that does not need to form an opening in a bezel of a portion where a near infrared sensor is located.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

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 order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

As the functions of the mobile terminal are diversified, various sensors are used. A gyroscope or a gravity sensor may be located inside the mobile terminal, but a sensor that detects light is placed on the surface of the mobile terminal.

As a representative example, a near-infrared sensor for detecting proximity of an object is formed in a bezel area toward the front of the mobile terminal to detect proximity to a display unit of the mobile terminal.

The present invention is proposed to meet the above-mentioned needs, and an object thereof is to provide a mobile terminal including a bezel, characterized in that it is not necessary to form an opening in the bezel of the portion where the near-infrared sensor is located.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

In order to achieve the above object, the present invention, the electronic component is mounted therein, a case formed with a through window on the front; A glass window inserted into the through window; A first layer formed around a rear surface of the glass window to implement a color of the bezel; A second layer formed on a rear surface of the first layer and having a low light transmittance in a visible light region and a high light transmittance in an infrared region; And a near infrared sensor positioned on the rear surface of the second layer.

In this case, the first layer may be formed to a thickness of about 1μm or more and 10μm or less.

The first layer may be a processed surface having a surface treatment of the rear surface of the glass window to increase the reflectance of visible light.

Alternatively, the first layer may be white.

The first layer may have a light transmittance of 60% or more in the infrared region.

The second layer may be formed by depositing at least one of TiO 2 or SiO 2 a plurality of times.

The second layer may be formed by the e-beam method.

The second layer may be formed on the entire rear surface of the first layer.

The second layer may be formed on a bezel of a portion where the near infrared sensor is located, and portions other than the upper second layer on the rear surface of the first layer may further include a third layer made of a light blocking material.

The second layer may be formed of a material having a low transmittance of light in the visible region and a high transmittance of light in the infrared region.

The second layer may be formed in a silver color.

According to another aspect of the invention, the electronic component is mounted therein and a case formed with a through window on the front; A glass window inserted into the through window; A first layer formed around a rear surface of the glass window to implement a color of the bezel; A second layer of silver material; And a near infrared sensor positioned on the rear surface of the second layer.

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, even when using a bezel of bright colors such as white, it is not necessary to form an opening for the near-infrared sensor, thereby increasing the sense of unity of the front design of the mobile terminal.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2 is a front perspective view of a mobile terminal according to an embodiment of the present invention.
3 is a rear perspective view of a mobile terminal according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a near-infrared sensor and a glass window of a mobile terminal according to an embodiment of the present invention.
5 is a perspective view illustrating a bezel printing method on a glass window of a mobile terminal according to an embodiment of the present invention.
6 is a graph of transmittance according to the material of the bezel.
7 is a reflectance graph according to the material of the bezel.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. 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.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation.

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, etc., except when applicable only to mobile terminals.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention. The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 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 broadcast channel switching for at least two broadcast channels.

The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information means information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (Mobile Broadcasting Business Management System), ISDB-T (Integrated Services Digital Broadcasting (ISDB-T)), Digital Multimedia Broadcasting (MBMS) Digital Broadcast-Terrestrial) or the like. Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 may be coupled to a base station, an external terminal, or a server on a mobile communication network, such as, but not limited to, Gobal System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband CDMA Transmits and receives wireless signals with one. 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. Wireless Internet technologies include WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), GSM, CDMA, WCDMA, LTE Evolution (but not limited to) may be used.

The wireless Internet module 113, which performs wireless Internet access through the mobile communication network, is connected to the mobile communication module 110 through the mobile communication network, for example, from the viewpoint that the wireless Internet access by Wibro, HSDPA, GSM, CDMA, WCDMA, LTE, (112). ≪ / RTI >

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module. According to the current technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites, and then applies trigonometry to the calculated information to obtain a three-dimensional string of latitude, longitude, The location information can be accurately calculated. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module 115 can calculate speed information by continuously calculating the current position in real time.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. 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 can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a button 136 located on the front, rear, or side of the mobile terminal 100, and a touch sensor (static / static) 137. Although not shown, ), A dome switch, a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. Meanwhile, the sensing unit 140 may include a near infrared sensor 141.

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

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, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

In the case where the display unit 151 and the touch sensor 137 have a mutual layer structure or are integrally formed (hereinafter referred to as a 'touch screen'), the display unit 151 may be used as an input device . The touch sensor 137 may be stacked on the display unit 151 to form a layer structure when the touch sensor 137 has a form of a touch film, a touch sheet, a touch pad, or the like. And may be integrally formed.

The touch sensor 137 may be configured to convert a change in a pressure applied to a specific part of the display part 151 or a capacitance generated in a specific part of the display part 151 into an electrical input signal. The touch sensor 137 can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor 137, the corresponding signal (s) is sent to the touch controller (not shown). The touch controller processes the signal (s) and 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.

The near-infrared sensor 141 may be disposed in the inner region of the mobile terminal wrapped by the touch screen or near the touch screen. The near-infrared 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 mechanical contact.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch" The act of actually contacting the pointer on the touch screen may be referred to as "contact touch. &Quot; The location where the pointer is proximately touched on the touch screen may refer to a position where the pointer corresponds vertically to the touch screen when the pointer is touched.

The near-infrared sensor 141 detects 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). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The sound output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 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 module 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 module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. In this case, the display unit 151 and the audio output module 152 may be a type of the alarm unit 153. The display unit 151 and the audio output module 152 may be connected to the display unit 151 or the audio output module 152, .

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include 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, contact with an electrode, 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 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory unit 160 may store a program for processing and controlling the control unit 180 and temporarily store the input / output data (e.g., telephone directory, message, audio, For example. The memory unit 160 may store the frequency of use of each of the data (for example, each telephone number, each message, and frequency of use for each multimedia).

In addition, the memory unit 160 may store data on vibration and sound of various patterns output when the touch is input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

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 general user authentication module 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 port.

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

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

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 may include, for example, a battery, a connection port, a power supply control unit, and a charge monitoring unit.

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. The connection port may be configured as an example of an interface 170 through which an external charger for supplying power for charging the battery is electrically connected.

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

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

FIG. 2 is a perspective view of a mobile terminal or a portable terminal according to the present invention, as viewed from the front.

The disclosed mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto and may be applied to various structures such as a slide type, a folder type, a swing type, a swivel type, and two or more bodies are coupled to be movable relative to each other.

The body of the mobile terminal 100 includes a casing 101, 102, In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102.

A component such as a USIM card and a memory card, such as an auxiliary storage medium 165, which may be detached, may include an opening in the case so as to be inserted into the case from the outside. Slots may be formed on the side of the case so that the auxiliary storage medium 165 may be inserted from the side of the mobile terminal 100 and card slots 166 and 167 may be formed on the surface of the rear case 102 It is possible.

The cases 101, 102, and 103 may be formed by injection molding synthetic resin or may be formed of a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the sound output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, and the interface 170 may be disposed in the terminal cases 101 and 102.

The display unit 151 occupies most of the main surface of the front case 101. A bezel 200 covering a portion other than the active area where the screen of the display unit 151 is output is positioned around the display unit 151. The bezel 200 includes a camera 121, a user input unit 131, a near infrared sensor 141, and the like.

A sound output unit 152 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132 and the interface 170 may be disposed on the side surfaces of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the mobile terminal 100 and may include a plurality of operation units 131, 132, and 133. The operation units 131, 132, and 133 may be collectively referred to as a manipulating portion.

The contents inputted by the first or second operation unit 131 or 132 may be variously set. For example, the first operation unit 131 receives a command such as start, end, scroll, and the like, and the second operation unit 132 inputs a command such as adjustment of the sound output from the sound output unit 152 And the third operation unit 133 can receive commands such as activation / deactivation of the touch recognition mode of the display unit 151 and the like.

The operation units 131, 132 and 133 may have a button system recognized when a user applies pressure and a touch sensor 137 may be provided to the operation units 131, 132 and 133 in addition to the display unit 151 So that the user's command can be received only by the user's touch.

3 is a rear perspective view of the mobile terminal shown in FIG.

Referring to FIG. 3, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2), and may be a camera having the same or different pixels as the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body such that they can be rotated or pop-up.

A flash 123 and a mirror 124 may be additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output 152 'on the rear side of the body may implement the stereo function together with the sound output 152 (see FIG. 2) of the front side of the body, and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for talking and the like, a broadcast signal reception antenna 116 may be additionally disposed on the side of the terminal body. The antenna 116, which forms part of the broadcast receiving module 111 (see FIG. 1), can be installed to be able to be drawn out from the terminal body.

4 is a cross-sectional view illustrating a near-infrared sensor 141 and a glass window 105 of a mobile terminal according to an embodiment of the present invention.

The near-infrared 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 thereof without using a mechanical contact using infrared rays, and as shown in FIG. Located.

The near infrared sensor 141 may include a light emitting sensor 141a and a light receiving sensor 141b. The light emitting sensor 141a emits infrared rays, and the light receiving sensor 141b detects infrared rays incident by the infrared light emitted from the light emitting sensor 141a reflected on an external object.

The light emitting sensor 141a may use a special light emitting diode (LED) that emits infrared rays, and the light receiving sensor 141b may grasp the degree of reception of light using the principle that the amount of current changes according to the amount of infrared rays received. .

The infrared rays emitted from the light emitting sensor 141a and the surrounding objects must be transmitted to the front glass window 105 by being detected by the light receiving sensor 141b. The bezel 200 in which the near-infrared sensor 141 is located is formed of an opaque material to block not only visible light but also infrared light.

The portion where the near-infrared sensor 141 is located on the bezel 200 forms an opening so that infrared light may be emitted from the light emitting sensor 141a and infrared light may flow into the light receiving sensor 141b. However, the opening of the bezel 200 harms the uniform design of the front surface of the mobile terminal. In particular, when the bezel 200 of a bright color such as white is used, only the opening is black, which is not aesthetically pleasing.

In order to solve this problem, the present invention is characterized in that the infrared ray is transmitted, and the opening for the near infrared sensor is realized by implementing the bezel 200 made of a light-colored material such as white.

For convenience of description, the embodiment of the white color with the bright color of the bezel 200 will be described. As shown in FIG. 4, the bezel 200 of the present invention is formed by stacking two layers on the rear surface of the glass window 105.

The first layer 210 implementing the color of the bezel 200 and the second layer 220 which blocks light in the visible region and transmits only light in the infrared region are formed.

The first layer 210 may be formed by printing in the color of the bezel 200 to be implemented. For example, it can be formed by printing with a bright color ink such as white, and because it has a property of reflecting light, if formed too thick, infrared rays cannot penetrate. Thus, the first layer 210 prints only once or twice to form as thin as possible.

It is formed to a thickness of about 1μm or more and 10μm or less. The first layer of thickness exhibits an infrared transmission of at least about 60%.

Alternatively, the first layer 210 may implement color by processing the surface of the glass window 105 to scatter light. In this case, however, when the processing is performed so that scattering is too much, there is a problem that the transmittance of not only visible light but also infrared light is lowered. Therefore, the light transmittance of the infrared light is processed to 60% or more.

The second layer 220 is formed on the rear surface of the first layer 210. The second layer 220 has a high transmittance of light in an infrared region and a low transmittance of a visible ray region. Therefore, the infrared light emitted from the light emitting sensor 141a is transmitted, but when viewed from the outside, there is an effect of blocking the inside from being seen. By adding the second layer 220 to the back of the first layer 210, unlike the conventional near infrared sensor 141, the user may not see the near infrared sensor 141 from the outside.

The second layer 220 is TiO ₂ Alternatively, at least one of SiO ₂ may be formed by depositing a plurality of times or alternately. TiO ₂ Alternatively, the deposition of SiO ₂ may use an e-beam method, and the second layer 220 may be silver.

FIG. 5 is a perspective view illustrating a method of printing a bezel 200 on a glass window 105 of a mobile terminal according to an embodiment of the present invention. First, a first layer 210 is formed on a window glass by depositing it once. Afterwards, the second layer 220 may be formed through a plurality of deposition processes.

The first layer 210 may be formed on the bezel 200 except for the display unit, and the second layer 220 may be formed on the entire rear surface of the first layer 210, as shown in FIG. 5, the near-infrared sensor 141. It may be formed only in the part where) is located.

When the second layer 220 is formed only at a portion where the near infrared sensor 141 is located, a portion where the near infrared sensor 141 is not formed may be coated with a light blocking material to form the third layer 230.

The third layer 230 may use black ink used in a layer structure of a conventional bezel 200. The layer structure of the conventional bezel 200 lowers the transmittance of light by using black ink that is laminated to block light after printing a plurality of times in the color of the bezel 200.

6 is a graph illustrating transmittance according to a material used to form the bezel 200.

The light transmittance graph (1) of the black infrared ink blocks light in the visible light region (380 nm to 780 nm), and light in the infrared region (800 nm to 1000 nm) shows a transmittance of about 90%. The bezel 200 may be formed on the black bezel 200 using black infrared ink. However, the bezel 200 having a bright color such as white cannot be used because the infrared ink color is black.

Since the first layer 210 for implementing color blocks infrared rays, the first layer 210 forms a thin layer, and a black color is visible through the thin first layer 210, so that the color of the bezel 200 becomes dark, so that a desired bright color cannot be realized. .

The graph showing white ink applied three times and using black ink on the back (②) blocks all the light in all areas. This layer structure is used for a mobile terminal of a conventional white bezel 200, and an opening is necessary for the near infrared sensor 141.

In the case of printing once with only white ink (③), the visible light region shows a transmittance of about 50% and the infrared region shows a transmittance of about 60%. Since infrared rays and visible rays also transmit a certain amount, there is a problem in that the rear surface is visible. In order to solve the problem of the rear view, the light transmittance in the visible region should be lowered.

Similar to the black infrared ink, the light transmittance ⑤ of the second layer 220 has a high light transmittance in the infrared region and a low light transmittance in the visible ray region. If the second layer 220 is formed on the back of the first layer 210 coated with the white ink once (④), the light transmittance of the visible light region may be lowered, and thus the bezel 200 may be formed so that the internal parts are not visible. have.

However, since the light transmittance of the infrared region cannot be greater than the light transmittance of the first layer 210, the light transmittance of the infrared region is similar to the light transmittance graph ③ of the first layer 210 printed once with white ink. When the light transmittance in the infrared region is low, the sensitivity of the light receiver can be increased so that a small amount of infrared rays can be detected.

7 is a graph illustrating reflectance according to materials of the bezel 200. As in the case of applying black infrared ink or white ink (①②③), achromatic color shows a relatively flat graph in the visible light region. That is, achromatic color shows a uniform reflectance at all wavelengths in the visible light region, and when the reflectance at a specific wavelength is high, the color is seen as a color having a high reflectance.

In the case where only the second layer 220 is formed, the graph (⑤) shows severe bending in the visible light region. In the case where only the second layer 220 is formed, the color silver color appears due to high reflectance at a specific wavelength. The first layer 210 may be formed on the entire surface of the second layer 220 to reduce the difference in reflectance according to the wavelength in the visible light region. As shown in the graph, even reflectance appears in the visible region (④). Therefore, the color of the bezel 200 may be realized in white by coating the surface with white ink once.

That is, the present invention uses the first layer 210 to implement the color of the bezel 200 and the second infrared ray 220 which blocks light in the visible region and transmits only light in the infrared region. 141 provides a mobile terminal that does not need to form a hole in the bezel 200.

According to at least one of the embodiments of the present invention, even when using the bezel 200 of a bright color such as white, it is not necessary to form an opening for the near-infrared sensor 141 can increase the sense of unity of the front design of the mobile terminal have.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

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

100: mobile terminal 110: wireless communication unit
120: A / V input / output unit 130: user input unit
140: sensing unit 150: output unit
160: memory 170: interface section
180: control unit 190: power supply unit
141: near infrared sensor 200: bezel
210: first layer 220: second layer
230: third layer

Claims (10)

A case in which an electronic component is mounted therein and a through-window is formed on a front surface thereof;
A glass window inserted into the through window;
A first layer formed around a rear surface of the glass window to implement a color of the bezel;
A second layer formed on a rear surface of the first layer and having a low light transmittance in a visible light region and a high light transmittance in an infrared region; And
A mobile terminal comprising a near infrared sensor located on the rear surface of the second layer. The method of claim 1,
The first layer
And a surface treatment of the rear surface of the glass window to increase the reflectance of visible light. The method of claim 1,
The first layer is a mobile terminal, characterized in that the white color. The method of claim 1,
The thickness of the first layer,
A mobile terminal, characterized in that about 1μm or more and 10μm or less. The method of claim 1,
Wherein the first layer comprises:
A mobile terminal, characterized in that the light transmittance of the infrared region is 60% or more. The method of claim 1,
The second layer is
Mobile terminal characterized in that formed by depositing at least one of TiO ₂ or SiO _{2 a} plurality of times. The method of claim 1,
The second layer
A mobile terminal, characterized in that formed in the e-beam method. The method of claim 1,
The second layer
A mobile terminal, characterized in that formed on the entire back surface of the first layer. The method of claim 1,
The second layer is formed on the bezel of the portion where the near infrared sensor is located,
A portion other than the upper second layer behind the first layer further includes a third layer made of a light blocking material. The method of claim 1,
The second layer is a mobile terminal, characterized in that the silver (silver) color.

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