KR20160047180A - Mobile terminal - Google Patents

Abstract

A bar-shaped case having an electric part; A speaker hole formed on a side surface of the case; A resonance space formed inside the speaker hole; And a speaker module for emitting a sound towards the resonance space, wherein the resonance space is wider as the resonance space is closer to the speaker hole. The mobile terminal of the present invention improves the resonance space of the speaker to improve the sound quality of the high frequency band have.

Description

[0001] MOBILE TERMINAL [0002]

The present invention relates to a mobile terminal having a lower speaker capable of outputting sound quality of high quality in a high frequency band.

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. .

For the multimedia function of the mobile terminal, the sound function as well as the technology related to the image displayed on the screen is very important. A cable can be used to connect to an external speaker to output sound through an external speaker, but a speaker can be provided to output sound.

The acoustic output device requires a resonance space in which the output sound can be amplified, and the shape and size of the resonance space are being studied for optimum sound quality.

An object of the present invention is to provide a mobile terminal in which the resonance space of the sound output module is sufficiently secured to improve the quality of sound output from the sound output module.

A bar-shaped case having an electric part; A speaker hole formed on a side surface of the case; A resonance space formed inside the speaker hole; And a speaker module for emitting a sound toward the resonance space, wherein the resonance space becomes wider as it approaches the speaker hole.

The sidewall of the resonance space includes an inclined surface, and the volume of the resonance space reduced by the inclined surface can be set to 4% or more and 18% or less of the resonance space when the surface is not on the inclined surface.

The resonance space includes a first surface in contact with the speaker module, a second surface adjacent to the first surface and formed with the speaker hole, and at least one inclined surface facing the first surface and adjacent to the second surface And may include a third side.

The inclination may be composed of the plurality of stepped portions.

A display unit coupled to a front surface of the case; A main board disposed on a rear surface of the display unit; The speaker module may be coupled to the back surface of the main board, and the resonance space may be positioned between the speaker module and the back surface of the case.

The speaker hole may gradually increase inward from the inside.

According to at least one embodiment of the present invention, the resonance space of the speaker can be improved to improve the sound quality in the high frequency band.

Further scope of applicability of the invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1A is a block diagram illustrating a mobile terminal according to the present invention.
1B and 1C are perspective views illustrating an example of a mobile terminal according to the present invention.
2 is a graph showing the performance difference between the bottom emission speaker and the back emission speaker.
3 is a cross-sectional perspective view illustrating a speaker portion of a conventional mobile terminal.
4 is a cross-sectional perspective view showing a third surface of a resonance space according to an example of a mobile terminal according to the present invention.
5 is a cross-sectional view illustrating an example of a speaker portion of a mobile terminal according to the present invention.
FIG. 6 is a graph comparing performance between a mobile terminal according to the present invention and a conventional mobile terminal.
7 and 8 are perspective views showing a third side of the resonance space according to another example of the mobile terminal related to the present invention.
FIG. 9 is a cross-sectional view illustrating various slopes in order to compare performances according to sizes of slopes in a mobile terminal according to the present invention.
10 is a graph comparing performance of each embodiment of FIG.
11 is a cross-sectional perspective view illustrating an acoustic hole according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description 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. [

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 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 unibody mobile terminal 100 in which 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 first camera 121a and a first operation unit 123a are disposed on the side of the terminal body and a second operation unit 123b, a microphone 122, a second sound output unit 152b, And a second camera 121b is disposed on the rear surface of the terminal body.

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.

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 may be referred to as 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 second sound output unit 152b may be disposed on the back surface of the mobile terminal 100 or may be disposed on the side surface. A sound is output in a direction opposite to the user in a state in which the display unit 151 is oriented toward the user and a state in which the display unit 151 is mounted on the top face of the display unit 151 There is a problem that the speaker hole is blocked on the floor and the sound is not heard well.

When the speaker hole 1525 through which the sound of the sound output unit 152b is output is placed on the back face, the quality of the back design is deteriorated. When the second sound output unit 152b is arranged to face the side, ) Are increasing. However, there is a problem that sound emitted through the side surface is deteriorated in a high frequency band (6000 Hz to 8000 Hz), and sharp sound is output. Hereinafter, the second sound output unit 152b will be referred to as a speaker for convenience of explanation.

2 is a graph showing the performance difference between the bottom emission speaker and the back emission speaker. The horizontal axis represents the frequency, the vertical axis represents the sensitivity, and the sound output from the speaker is required to be within the range indicated by the solid line in FIG.

In the case of backside radiation, it is located within the range indicated by the solid line from the low frequency band to the high frequency band. However, in the case of lower radiation, the performance is degraded from 5000Hz, and in the high frequency band above 6000Hz, the performance is lower than the solid line. When the graph falls below the solid line, a tearing sound is output, making it impossible to properly output high frequency sound in the high frequency range.

This is because the sound of the high frequency band is not properly resonated in the first resonance space 1521 which amplifies the sound to be outputted. In order to output high quality sound even in the high frequency band, the high frequency band of the speaker 152b It is necessary to improve the shape of the first resonance space 1521 for amplifying the sound.

3 is a conceptual diagram illustrating a resonance space of a speaker 152b of a conventional mobile terminal. The speaker 152b is located on the lower side of the mobile terminal and has a first resonance space 1521 located in a direction in which sound is output and a second resonance space 1523 located on the rear side. The second resonance space 1523 is related to the performance of the low frequency (low frequency band), and the larger the sound quality can be outputted.

The first resonance space 1521 is connected to the speaker hole 1525 formed on the side of the case and serves as a path through which sound is output. The first resonance space 1521 is a space between the rear case and the speaker module 1528 when the speaker module 1528 is arranged to output sound in the back direction. When the first resonance space 1521 is arranged to output sound in the front direction, Module 1528. In this case, In the case of being disposed to face the front direction, a resonance space can be formed by using a middle case located on the rear surface of the front case.

The conventional first resonance space 1521 has a rectangular box shape as shown in FIG. 3. In this case, the output of the first resonance space 1521 is lowered in the high frequency band as the performance of the side output speaker of FIG. The first resonance space 1521 is related to the performance of the high frequency (high frequency band) of the speaker hole 1525 through which the sound is output. If the size is large, the performance is degraded in the high frequency band.

However, since the first resonance space 1521 is a passage through which the sound is output to the speaker hole 1525, if the resonance space is formed to be too small, there is a problem that the sound is blocked and output.

The first resonance space 1521 is widened closer to the speaker hole 1525 and the second resonance space 1521 is formed in the speaker hole 1525 so as to reduce the size of the first resonance space 1521, And the inclined plane 1522 may be narrowed so that the first resonance space 1521 becomes narrower.

The slope 1522 may be formed in the speaker module 1528 itself, but the slope 1522 may be formed inside the case facing the speaker module 1528. The first resonance space 1521 of this embodiment is defined by the middle case 104 and the speaker module 1528 and includes a first surface 1521a on which the speaker module 1528 is located, A third surface 1521c adjacent to the second surface 1521b and facing the first surface 1521a and a second surface 1521b facing away from the first surface 1521a and the third surface 1521b, And a fourth surface 1521d to a sixth surface 1521f positioned between the surfaces 1521c and 1521c.

FIG. 4 is a cross-sectional perspective view of a first resonant space 1521 according to an exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating an example of a speaker module 1528 of a mobile terminal according to the present invention.

4 and 5, the first resonance space 1521 of the present invention includes a slope 1522 on a first surface 1521a or a third surface 1521c in a hexahedron having six surfaces, The first resonance space 1521 widens closer to the second surface 1521b.

FIG. 6 is a graph comparing the performance of a mobile terminal 100 according to the present invention and a conventional mobile terminal, and is a graph showing a relationship between a sound output through the structure of the conventional first resonance space 1521 (see FIG. 3) (See FIGS. 4 and 5) of the first resonance space 1521 of FIG.

The sound passing through the first resonance space 1521 has a deteriorated sound quality in the high frequency band. However, in the present invention, it is possible to output the sound quality within the required performance range in the high frequency band while gently bending the graph in the high frequency band.

7 and 8 are perspective views showing a third side 1521c of the resonance space 1521 according to another example of the mobile terminal according to the present invention. In addition to the simple slope 1522 as shown in Fig. 5, It may be configured to have three inclined surfaces 1522 extending from the fifth surface 1521e and the sixth surface 1521f of the fourth surface 1521d as shown in FIG.

Alternatively, the inclined surface 1522 may be formed in a stepped manner with a stepped portion as shown in FIG. 8, and in this embodiment also, the space of the third surface 1521c on which the speaker hole 1525 is formed has the widest space.

FIG. 9 is a view illustrating various embodiments according to the volume occupied by the slope 1522 of the mobile terminal according to another aspect of the present invention, and FIG. 10 is a graph illustrating the efficiency according to the volume occupied by the slope 1522 of FIG.

Referring to FIG. 9, when the volume of the space in which the resonance space is reduced by the inclined surface 1522 is 20%, 15% is 12%, 10%, 5% Respectively. The inclination of the inclined plane 1522 may change and the inclination angle may be maintained as shown in Fig. 9 to distinguish the starting point and the end point of the inclined plane 1522, .

Referring to FIG. 10, the performance should be within the range of the reference line even in the high frequency band. As the volume of the inclined plane 1522 increases, the frequency band in which the peak point of the graph is pushed into the high frequency band and is located within the reference line range is widened as compared with the case of 0%. Referring to the graph, the frequency bands located within the baseline range at 12% and 15% are the widest.

However, if the volume decreased by the slope 1522 is greater than 20%, it is less than the reference line when it is more than 8000Hz, and the volume reduced by the slope 1522 is preferably about 4% or more and 18% or less.

11 is a cross-sectional perspective view showing a speaker hole 1525 according to an example of a mobile terminal related to the present invention. The speaker hole 1525 may be formed in a taper shape gradually increasing inward from the inside to amplify the sound. When the protrusion 1525a is formed on the wall surface as shown in FIG. 11, sound distortion is minimized, Noise can be reduced.

As described above, according to at least one embodiment of the present invention, it is possible to improve the sound quality in the high frequency band by improving the resonance space of the speaker.

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.

100: mobile terminal 101: front case
102: rear case 104: middle case
101a, 101b: case 110: wireless communication section
120: input unit 140: sensing unit
150: output unit 151: display unit
160: interface unit 170: memory
180: control unit 190: power supply unit
152b: sound output section 1528: speaker module
1521: first resonance space 1523: second resonance space
1522: slope 1525: speaker hole

Claims (6)

A bar-shaped case having an electric part;
A speaker hole formed on a side surface of the case;
A resonance space formed inside the speaker hole;
And a speaker module for emitting sound toward the resonance space,
And the resonance space is spread toward the speaker hole. The method according to claim 1,
The sidewall of the resonant space including an inclined surface,
And the volume of the resonance space reduced by the inclined surface is not less than 4% and not more than 18% of the resonance space when the resonance space is not present on the inclined surface. The method according to claim 1,
The resonance space
A first surface in contact with the speaker module,
A second surface adjacent to the first surface and having the speaker hole formed therein,
And a third surface facing the first surface and adjacent to the second surface and having at least one inclination formed thereon. The method of claim 3,
Preferably,
And a plurality of stepped portions. The method according to claim 1,
A display unit coupled to a front surface of the case;
A main board disposed on a rear surface of the display unit;
The speaker module is coupled to a back surface of the main board,
Wherein the resonance space is located between the speaker module and a back surface of the case. 6. The method of claim 5,
And the speaker hole gradually increases inward from the inside.

Images