阅读说明：本技术 扬声器模组、电子设备和控制方法 (Speaker module, electronic device and control method ) 是由 孙小光 于 2021-09-06 设计创作，主要内容包括：本申请公开一种扬声器模组、电子设备和控制方法。扬声器模组包括扬声器壳体和两个扬声器单元。扬声器壳体开设有第一出声孔和第二出声孔,第一出声孔的出声方向与第二出声孔的出声方向不同。两个扬声器单元均设置在扬声器壳体内,两个扬声器单元包括第一扬声器单元和第二扬声器单元,第一扬声器单元与第一出声孔连通,第一扬声器单元通过第一出声孔出声；第二扬声器单元与第二出声孔连通,第二扬声器单元通过第二出声孔出声。本申请由于第一出声孔的出声方向与所述第二出声孔的出声方向不同,如此,扬声器模组的第一出声孔和第二出声孔不容易被同时堵住,因此,能够有效地避免扬声器模组的出声孔被堵住而导致声音变小。(The application discloses a speaker module, electronic equipment and a control method. The speaker module includes a speaker housing and two speaker units. The loudspeaker shell is provided with a first sound outlet and a second sound outlet, and the sound outlet direction of the first sound outlet is different from the sound outlet direction of the second sound outlet. The two loudspeaker units are arranged in the loudspeaker shell and comprise a first loudspeaker unit and a second loudspeaker unit, the first loudspeaker unit is communicated with the first sound outlet, and the first loudspeaker unit emits sound through the first sound outlet; the second loudspeaker unit is communicated with the second sound outlet, and the second loudspeaker unit emits sound through the second sound outlet. This application because the play sound direction in first sound outlet with the play sound direction in second sound outlet is different, so, the first sound outlet and the second sound outlet of speaker module are difficult to be plugged up simultaneously, consequently, can avoid the sound outlet of speaker module to be plugged up effectively and lead to sound to diminish.)

1. A speaker module, characterized in that the speaker module comprises:

the loudspeaker shell is provided with a first sound outlet and a second sound outlet, and the sound outlet direction of the first sound outlet is different from the sound outlet direction of the second sound outlet;

the two loudspeaker units are arranged in the loudspeaker shell and comprise a first loudspeaker unit and a second loudspeaker unit, the first loudspeaker unit is communicated with the first sound outlet, and the first loudspeaker unit produces sound through the first sound outlet; the second loudspeaker unit is communicated with the second sound outlet, and the second loudspeaker unit emits sound through the second sound outlet.

2. The speaker module as claimed in claim 1, wherein a front sound cavity is formed in the speaker housing, the speaker module further comprises a partition wall, the partition wall divides the front sound cavity into a first front sound cavity and a second front sound cavity which are not communicated with each other, the first speaker unit is communicated with the first sound outlet through the first front sound cavity, and the second speaker unit is communicated with the second sound outlet through the second front sound cavity.

3. The speaker module as claimed in claim 1, wherein the speaker housing comprises a first side surface and a second side surface perpendicular to each other, the first side surface being provided with the first sound outlet, and the second side surface being provided with the second sound outlet.

4. The speaker module as claimed in claim 1, wherein the speaker unit comprises a magnet for driving the voice coil, a voice coil, and a diaphragm capable of following the voice coil to generate sound.

5. The speaker module as claimed in claim 1, wherein a rear sound cavity is formed in the speaker housing, and the first speaker unit and the second speaker unit share the rear sound cavity.

6. The speaker module as claimed in claim 1, wherein a first rear sound chamber and a second rear sound chamber are formed in the speaker housing, the first speaker unit is in communication with the first rear sound chamber, and the second speaker unit is in communication with the second rear sound chamber.

7. An electronic device, comprising a housing and the speaker module of any one of claims 1-6, wherein the speaker module is disposed in the housing.

8. The electronic device of claim 7, wherein the complete machine housing has a first complete machine sound outlet and a second complete machine sound outlet, the first complete machine sound outlet is disposed opposite to the first sound outlet, and the second complete machine sound outlet is disposed opposite to the second sound outlet.

9. The electronic device of claim 7, wherein the electronic device comprises two speaker modules, and the two speaker modules are disposed at diagonal positions of the electronic device.

10. A control method for an electronic device according to any one of claims 7 to 9, the control method comprising:

and controlling the first loudspeaker unit and/or the second loudspeaker unit to work according to the use state of the electronic equipment.

Technical Field

The present application relates to the field of consumer electronics, and more particularly, to a speaker module, an electronic device, and a control method.

Background

In the related art, the speaker may be disposed at the bottom of the electronic device, and when the user uses the electronic device, the sound outlet of the speaker is easily blocked, so that the sound is reduced and the user experience is affected.

Disclosure of Invention

The embodiment of the application relates to a loudspeaker module, electronic equipment and a control method.

The loudspeaker module of this application embodiment includes speaker housing and two speaker units. The loudspeaker shell is provided with a first sound outlet and a second sound outlet, and the sound outlet direction of the first sound outlet is different from the sound outlet direction of the second sound outlet. The two loudspeaker units are arranged in the loudspeaker shell and comprise a first loudspeaker unit and a second loudspeaker unit, the first loudspeaker unit is communicated with the first sound outlet, and the first loudspeaker unit emits sound through the first sound outlet; the second loudspeaker unit is communicated with the second sound outlet, and the second loudspeaker unit emits sound through the second sound outlet.

The electronic equipment of the embodiment of the application comprises a whole machine shell and the loudspeaker module, wherein the loudspeaker module is arranged in the whole machine shell.

The control method of the embodiment of the present application may be applied to the electronic device, and the control method includes: and controlling the first loudspeaker unit and/or the second loudspeaker unit to work according to the use state of the electronic equipment.

The loudspeaker module, the electronic equipment and the control method have the advantages that the sound emitting direction of the first sound emitting hole is different from the sound emitting direction of the second sound emitting hole, so that the first sound emitting hole and the second sound emitting hole of the loudspeaker module are not easy to be plugged simultaneously, therefore, the first loudspeaker unit can emit sound normally through the first sound emitting hole and/or the second loudspeaker unit can emit sound normally through the second sound emitting hole, the sound emitting holes of the loudspeaker module can be effectively prevented from being plugged, sound is reduced, and the loudspeaker module can be suitable for more use scenes.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a speaker module according to some embodiments of the present disclosure.

Fig. 2 is a schematic structural diagram of an electronic device according to some embodiments of the present application.

FIG. 3 is a flow chart illustrating a control method according to some embodiments of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the related art, the speaker may be disposed at the bottom of the electronic device, and when a user uses the electronic device, for example, looks at a video across a screen or plays a game, the user holds the top and the bottom of the electronic device with hands, so that the sound outlet of the speaker is easily blocked, thereby causing a reduction in sound and affecting the user experience. Meanwhile, when the hand is close to the sound outlet of the loudspeaker, the palm is affected by the air flow of the loudspeaker, so that a numb feeling can be generated, and the hand holding experience is poor.

Referring to fig. 1, a speaker module 10 according to an embodiment of the present disclosure includes a speaker housing 12 and two speaker units 14. The speaker housing 12 is provided with a first sound outlet 122 and a second sound outlet 124, and the sound emitting direction of the first sound outlet 122 is different from the sound emitting direction of the second sound outlet 124. The two speaker units 14 are both disposed in the speaker housing 12, the two speaker units 14 include a first speaker unit 142 and a second speaker unit 144, the first speaker unit 142 communicates with the first sound outlet hole 122, and the first speaker unit 142 emits sound through the first sound outlet hole 122; the second speaker unit 144 communicates with the second sound outlet hole 124, and the second speaker unit 144 emits sound through the second sound outlet hole 124.

The speaker module 10 of the embodiment of the present application is because the sound emitting direction of the first sound emitting hole 122 is different from the sound emitting direction of the second sound emitting hole 124, and thus, the first sound emitting hole 122 and the second sound emitting hole 124 of the speaker module 10 are not easily plugged at the same time, and therefore, the first speaker unit 142 can emit sound normally through the first sound emitting hole 122 and/or the second speaker unit 144 can emit sound normally through the second sound emitting hole 124, thereby effectively avoiding the sound emitting hole of the speaker module 10 from being plugged and causing sound to be diminished, and enabling the speaker module 10 to be applicable to more use scenes.

The speaker housing 12 may be made of polyethylene, fiberglass, or the like. Of course, in other embodiments, the speaker housing 12 may be made of other materials such as metal, and is not limited in this respect. The two speaker units 14 can be packaged by using the speaker housing 12, so that the space occupied by the two speaker units 14 can be reduced to miniaturize the speaker module 10, while the two speaker units 14 are protected by using the speaker housing 12 to prevent the speaker units 14 from being affected by the external environment (from being affected by dust, water mist, and the like).

In some embodiments, the speaker module 10 may include at least three speaker units 14, and the at least three speaker units 14 may be implemented similarly to the two speaker units 14, for example, the speaker housing 12 may be formed with at least three sound outlet holes, which correspond to the speaker units 14 in a one-to-one manner, wherein the sound outlet directions of the at least two sound outlet holes are different. It should be noted that, when the speaker module 10 includes at least three speaker units 14, it is substantially equivalent to add an additional speaker unit 14 on the basis that the speaker module 10 includes two speaker units 14, and details are not described herein. The present application takes the example of the speaker module 10 including two speaker units 14 as an example.

In the embodiment of the present application, the sound emitting direction of the first sound emitting hole 122 is different from the sound emitting direction of the second sound emitting hole 124, which may mean that the central axis of the first sound emitting hole 122 is not parallel to the central axis of the second sound emitting hole 124. Since the sound emitting direction of the first sound emitting hole 122 is different from the sound emitting direction of the second sound emitting hole 124, the first sound emitting hole 122 and the second sound emitting hole 124 can be effectively prevented from being simultaneously blocked.

With reference to fig. 1, in some embodiments, a front sound cavity 126 is formed in the speaker housing 12, the speaker module 10 further includes a partition wall 16, the partition wall 16 divides the front sound cavity 126 into a first front sound cavity 1262 and a second front sound cavity 1264 which are not communicated with each other, the first speaker unit 142 is communicated with the first sound outlet 122 through the first front sound cavity 1262, and the second speaker unit 144 is communicated with the second sound outlet 124 through the second front sound cavity 1264.

In this way, the partition wall 16 divides the front sound cavity 126 into the first front sound cavity 1262 and the second front sound cavity 1264 which are not communicated with each other, so that the sound quality can be prevented from being influenced by the mutual interference of the sound emitted by the first speaker unit 142 and the sound emitted by the second speaker unit 144. The partition wall 16 may be made of the same material as the speaker housing 12, for example, the speaker housing 12 and the partition wall 16 are made of polyethylene and fiberglass, but the material of the partition wall 16 and the speaker housing 12 may be different and is not limited thereto. The partition wall 16 and the speaker housing 12 may be integrally formed, or the partition wall 16 and the speaker housing 12 may be separately manufactured and then fixedly connected by welding, bonding, or fastening, etc. to the speaker housing 12 so as to divide the front sound cavity 126 into a first front sound cavity 1262 and a second front sound cavity 1264 that are not communicated with each other.

With reference to fig. 1, in some embodiments, the speaker housing 12 includes a first side surface 1282 and a second side surface 1284 perpendicular to each other, wherein the first side surface 1282 defines a first sound outlet 122, and the second side surface 1284 defines a second sound outlet 124.

Set up on mutually perpendicular's first side 1282 and second side 1284 and form first sound hole 122 and second sound hole 124 for first sound hole 122 and second sound hole 124 are 90 degrees and put, promptly, make the play sound direction of first sound hole 122 and the play sound direction of second sound hole 124 basically perpendicular, thereby when guaranteeing speaker module 10 miniaturization, can avoid first sound hole 122 and second sound hole 124 to be plugged up simultaneously effectively. It should be noted that the first side surface 1282 and the second side surface 1284 may be directly connected or connected by a rounded corner, and is not limited herein.

Of course, in other embodiments, the speaker housing 12 may also include a first side surface 1282 and a second side surface 1284 having a predetermined included angle, where the predetermined included angle is less than 180 degrees and is not 0 degree or 90 degrees, and the predetermined included angle is, for example, 50 degrees, 80 degrees, 95 degrees, 110 degrees, 126 degrees, and the like, and is not limited herein. Thus, the first sound outlet hole 122 formed by opening the first side surface 1282 and the second sound outlet hole 124 formed by opening the second side surface 1284 are at a predetermined included angle, that is, the sound outlet direction of the first sound outlet hole 122 and the sound outlet direction of the second sound outlet hole 124 are at a predetermined included angle, so that the first sound outlet hole 122 and the second sound outlet hole 124 can be effectively prevented from being simultaneously plugged while the miniaturization of the speaker module 10 is ensured.

In some embodiments, the speaker unit 14 includes a magnet for driving the voice coil, a voice coil, and a diaphragm capable of following the voice coil to generate sound.

In this way, the speaker unit 14 can realize audio playback using a magnet, a voice coil, a diaphragm, and other structures. Specifically, the voice coil can produce the magnetic field that changes along with the audio current when having the audio current, and this magnetic field takes place interact with the magnetic field of permanent magnet to make the voice coil can move, the voice coil can be connected with the vibrating diaphragm, and the motion of voice coil can drive the vibrating diaphragm motion, thereby produces sound. In some embodiments, the speaker unit 14 may further include a bracket, which may be used to support the voice coil and the diaphragm, and is not particularly limited herein.

In some embodiments, a back sound cavity is formed within the speaker housing 12, and the first speaker unit 142 and the second speaker unit 144 share the back sound cavity.

In this way, since the first speaker unit 142 and the second speaker unit 144 share the back sound cavity, the back sound cavity of the first speaker unit 142 corresponds to the virtual back sound cavity of the second speaker unit 144, and the back sound cavity of the second speaker unit 144 corresponds to the virtual back sound cavity of the first speaker unit 142, that is, the back sound cavities of the first speaker unit 142 and the second speaker unit 144 are enlarged, so that the sound emission effect can be enhanced.

In some embodiments, a first rear sound cavity and a second rear sound cavity are formed in the speaker housing 12, the first speaker unit 142 is in communication with the first rear sound cavity, and the second speaker unit 144 is in communication with the second rear sound cavity.

Specifically, the speaker module 10 may further include a partition that partitions the rear sound cavity of the speaker housing 12 into a first rear sound cavity and a second rear sound cavity that are not communicated with each other. In this way, the partition member is used to separate the rear sound cavity into a first rear sound cavity and a second rear sound cavity which are not communicated with each other, so that the first speaker unit 142 and the second speaker unit 144 can work independently. The spacer may be made of the same material as the speaker housing 12, for example, the speaker housing 12 and the spacer are made of polyethylene and fiberglass, but the material of the spacer and the speaker housing 12 may be different and is not limited thereto. In addition, the spacer and the speaker housing 12 may be integrally formed, or the spacer and the speaker housing 12 may be manufactured separately and then fixedly connected to each other by welding, bonding, or fastening, so as to separate the rear sound cavity into a first rear sound cavity and a second rear sound cavity that are not communicated with each other.

Referring to fig. 2, an electronic device 100 according to an embodiment of the present disclosure includes a speaker module 10 according to any one of the above embodiments and a casing 30, and the speaker module 10 is disposed in the casing 30.

The electronic device 100 according to the embodiment of the present application is characterized in that the sound emitting direction of the first sound emitting hole 122 is different from the sound emitting direction of the second sound emitting hole 124, and thus the first sound emitting hole 122 and the second sound emitting hole 124 of the speaker module 10 are not easily plugged at the same time, and therefore the first speaker unit 142 can emit sound normally through the first sound emitting hole 122 and/or the second speaker unit 144 can emit sound normally through the second sound emitting hole 124, so that the sound emitting hole of the speaker module 10 can be effectively prevented from being plugged and causing sound to be reduced, and the speaker module 10 can be applied to more use scenes.

In some embodiments, the electronic device 100 further includes a display, a microphone, a camera, and other elements, which may also be disposed in the whole casing 30, thereby forming an intelligent terminal.

The electronic device 100 may include a mobile phone, a tablet computer, and the like, and the embodiment of the present application is described by taking the mobile phone as an example.

Referring to fig. 2, in some embodiments, the whole casing 30 is provided with a first whole sound outlet 32 and a second whole sound outlet 34, the first whole sound outlet 32 is opposite to the first sound outlet 122, and the second whole sound outlet 34 is opposite to the second sound outlet 124.

Thus, the first speaker unit 142 can emit sound through the first sound emitting hole 122 and the first complete machine sound emitting hole 32, and the second speaker unit 144 can emit sound through the second sound emitting hole 124 and the second complete machine sound emitting hole 34, because the first complete machine sound emitting hole 32 and the first sound emitting hole 122 are arranged relatively and the second complete machine sound emitting hole 34 and the second sound emitting hole 124 are arranged relatively, the shortening of a sound pipeline is facilitated, and the high-frequency performance of the speaker module 10 is improved.

Specifically, the electronic device 100 may be rectangular, the whole housing 30 includes a first side 362, a second side 364, a third side 366, and a fourth side 368, the first side 362 and the third side 366 are opposite to each other, the second side 364 and the fourth side 368 are opposite to each other, the first side 362 is respectively connected to the second side 364 and the fourth side 368, the third side 366 is also respectively connected to the second side 364 and the fourth side 368, a first corner is formed at a joint of the first side 362 and the second side 364, a second corner is formed at a joint of the second side 364 and the third side 366, a third corner is formed at a joint of the third side 366 and the fourth side 368, and a fourth corner is formed at a joint of the fourth side 368 and the first side 362. When the electronic device 100 includes one speaker module 10, the speaker module 10 may be disposed at any one of the first corner, the second corner, the third corner and the fourth corner, and the first complete machine sound outlet 32 and the second complete machine sound outlet 34 may be disposed on two sides corresponding to the currently disposed corners, so that the first complete machine sound outlet 32 and the second complete machine sound outlet 34 can be effectively prevented from being simultaneously blocked.

Referring to fig. 2, in some embodiments, the electronic device 100 includes two speaker modules 10, and the two speaker modules 10 are disposed at diagonal positions of the electronic device 100.

Specifically, the electronic device 100 may be rectangular, the whole housing 30 includes a first side 362, a second side 364, a third side 366, and a fourth side 368, the first side 362 and the third side 366 are opposite to each other, the second side 364 and the fourth side 368 are opposite to each other, the first side 362 is respectively connected to the second side 364 and the fourth side 368, the third side 366 is also respectively connected to the second side 364 and the fourth side 368, a first corner is formed at a connection between the first side 362 and the second side 364, a second corner is formed at a connection between the second side 364 and the third side 366, a third corner is formed at a connection between the third side 366 and the fourth side 368, and a fourth corner is formed at a connection between the fourth side 368 and the first side 362, wherein the first corner and the third corner are opposite angles of the electronic device 100, the second corner and the fourth corner are opposite angles of the electronic device 100, and therefore, the two speaker modules 10 may be respectively disposed at the first corner and the third corner, or two speaker modules 10 may be disposed at the second corner and the fourth corner, respectively. Thus, when the two speaker modules 10 are disposed at diagonal positions of the electronic device 100, the four complete speaker holes corresponding to the four speaker holes of the two speaker modules 10 can be disposed on four sides of the complete housing 30, so that the two speaker modules 10 can be designed for stereo, for example, when the electronic device 100 is in a landscape state, the complete speaker holes of the second side 364 and the fourth side 368 emit sound to form left and right dual channels, and when the electronic device 100 is in a portrait state, the complete speaker holes of the first side 362 and the third side 366 emit sound to form left and right dual channels.

Referring to fig. 3, the control method according to the embodiment of the present application may be applied to the electronic device 100 according to any one of the above embodiments, and the control method includes:

02: the first speaker unit 142 and/or the second speaker unit 144 are controlled to operate according to the usage state of the electronic apparatus 100.

In some embodiments, the electronic device 100 further comprises a processor, and the step 02 may be implemented by the processor, that is, the processor may be configured to control the operation of the first speaker unit 142 and/or the second speaker unit 144 according to the usage status of the electronic device 100.

In the control method of the embodiment of the present application, since the sound emitting direction of the first sound emitting hole 122 is different from the sound emitting direction of the second sound emitting hole 124, and thus, the first sound emitting hole 122 and the second sound emitting hole 124 of the speaker module 10 are not easily blocked at the same time, therefore, the first speaker unit 142 can emit sound normally through the first sound emitting hole 122 and/or the second speaker unit 144 can emit sound normally through the second sound emitting hole 124, thereby effectively avoiding the sound emitting hole of the speaker module 10 from being blocked and causing sound to be reduced, and enabling the speaker module 10 to be applicable to more usage scenarios.

Specifically, each speaker unit may be driven by an independent Power Amplifier (PA), and the independent PA driving may individually control each speaker unit to operate. The usage state of the electronic device 100 includes a no-hole-blocking state, a horizontal-screen hole-blocking state, and a vertical-screen hole-blocking state. When the usage state of the electronic device 100 is the non-plugged state, the first speaker unit 142 and the second speaker unit 144 may operate simultaneously to increase the sound loudness; when the electronic device 100 is used in the landscape screen mode, the second sound outlet 34 corresponding to the second sound outlet 124 of the second speaker unit 144 is blocked by the user's hand, so that when the electronic device 100 is used in the landscape screen mode, the first speaker unit 142 can be controlled to work to sound through the first sound outlet 122 and the first sound outlet 32. Since the first complete machine sound outlet hole 32 corresponding to the first sound outlet hole 122 of the first speaker unit 142 is blocked by the user's hand when the electronic device 100 is used in the vertical screen state, when the electronic device 100 is used in the vertical screen blocking state, the second speaker unit 144 can be controlled to work to sound through the second sound outlet hole 124 and the second complete machine sound outlet hole 34.

Taking fig. 2 as an example for illustration, in the state of the cross screen blocking hole, the first speaker units 142 are controlled to work to sound through the first sound outlet holes 122 and the first complete machine sound outlet holes 32, and the two first speaker units 142 work simultaneously to form a left channel and a right channel; when the vertical screen is in a hole blocking state, the second loudspeaker units 144 are controlled to work to sound through the second sound outlet holes 124 and the second complete machine sound outlet holes 34, and two second loudspeaker units 144 work simultaneously to form a left sound channel and a right sound channel; in the non-plugged state, the two first speaker units 142 and the two second speaker units 144 may operate simultaneously to increase sound loudness. In addition, the second speaker unit 144 can be controlled to be closed in the horizontal screen hole blocking state, and the first speaker unit 142 can be controlled to be closed in the vertical screen hole blocking state, so that the hand numbness caused by the influence of the speaker airflow on the palm of the user can be avoided.

In some embodiments, the control method further comprises:

01: the use state of the electronic device 100 is detected.

In some embodiments, step 01 may also be implemented by a processor, that is, the processor may be configured to detect a usage status of the electronic device 100.

Specifically, the horizontal and vertical screen states of the electronic device 100 can be detected by controlling elements such as a gyroscope, a gravity sensor and the like, and then whether the speaker is plugged or not is detected, so that the detection of the non-plugged state, the horizontal screen plugged state and the vertical screen plugged state can be realized by combining.

In some embodiments, determining whether the speaker is plugged may be accomplished by detecting the temperature, loudness of sound, etc. of the speaker. For example, when the temperature of the loudspeaker is higher than the preset temperature or the temperature change in unit time is higher than the preset temperature change rate during working of the loudspeaker, the loudspeaker is determined to be blocked. And when the loudness of sound is less than the preset loudness when the loudspeaker works, determining that the loudspeaker is blocked.

It is worth mentioning that the processor may refer to a driver board. The driver board may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc.

In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.