CN111796635B - Conference equipment and electronic equipment - Google Patents
Conference equipment and electronic equipment Download PDFInfo
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- CN111796635B CN111796635B CN202010622669.XA CN202010622669A CN111796635B CN 111796635 B CN111796635 B CN 111796635B CN 202010622669 A CN202010622669 A CN 202010622669A CN 111796635 B CN111796635 B CN 111796635B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
- G06F1/1605—Multimedia displays, e.g. with integrated or attached speakers, cameras, microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
Abstract
The embodiment of the application discloses a conference device, the conference device includes: a display device; a support on which the display device is disposed; the support body is used for controlling the display device to display output information; the connecting body is used for connecting the display device and the support body, is obliquely arranged on the support body, and has an oblique angle with the plane where the support body is located; the connecting body is provided with a cavity, and at least two audio output components are embedded in the cavity; the audio output component outputs audio information through a cavity opening formed on the inclined surface of the connecting body; an included angle is formed between the output direction of the audio information of each audio output component and the plane where the support body is located, so that the audio information output by the at least two audio output components avoids the shielding of the display device and the support body. The embodiment of the application also discloses the electronic equipment.
Description
Technical Field
The application relates to the technical field of intelligent conference equipment, in particular to conference equipment and electronic equipment.
Background
The conference machine is an intelligent device integrating the functions of reporting, speaking, voting, displaying and the like, and provides instant information and services for various conferences. With the development of intelligent technology, the conference machine is more and more widely applied; of course, the demand for sound effects of conference machines is also increasing. However, in the conference machine in the related art, the sound output by the speaker may be shielded by the display screen and/or the base, and a surround sound field cannot be formed.
Content of application
In order to solve the technical problem, embodiments of the present application provide a conference device and an electronic device, which solve the problem that sound output by a speaker in a conference machine in a relative technology is shielded by a display screen and/or a base, and realize that sound output by the speaker of the conference machine forms a surround stereo sound field.
A conferencing device, the conferencing device comprising:
a display device;
a support on which the display device is disposed; the support body is used for controlling the display device to display output information;
the connecting body is used for connecting the display device and the support body, is obliquely arranged on the support body, and has an oblique angle with the plane where the support body is located;
The connecting body is provided with a cavity, and at least two audio output components are embedded in the cavity; the audio output component outputs audio information through a cavity opening formed on the inclined surface of the connecting body; an included angle is formed between the output direction of the audio information of each audio output component and the plane where the support body is located, so that the audio information output by the at least two audio output components avoids the shielding of the display device and the support body.
Optionally, the connecting body is provided with at least two cavities, and each cavity is internally provided with two audio output components;
the audio output components are arranged in an annular array mode around the axis of the connecting body, and sound fields of the audio output components in two or each adjacent cavities are complementary to form a surrounding stereo sound field.
Optionally, an output port of a first audio output component of two adjacent audio output components arranged in the same cavity is inclined in a direction away from the support body, so that a first included angle is formed between a direction in which the first audio output component outputs audio information and a plane where the support body is located.
Optionally, an output port of a second audio output component of two adjacent audio output components arranged in the same cavity is inclined towards a direction close to the support body, so that a second included angle is formed between a direction of the second audio output component outputting the audio information and a plane where the support body is located.
Optionally, the first included angle is complementary to the second included angle.
Optionally, an included angle between the output direction of the audio information of each audio output component and the plane where the support body is located is a target angle; wherein the target angle is determined based on the position of the first reference point, the position of the second reference point, the position of the third reference point, and the position of the fourth reference point; the first reference point and the second reference point are diametrically opposite points of the audio output part, and the third reference point and the fourth reference point are diametrically opposite points of the display device.
Optionally, the target angle is determined based on a first reference angle and a second reference angle; the first reference angle is obtained by calculating a first distance and a second distance determined by the position of the first reference point and the position of the third reference point; the second reference angle is obtained by calculating a third distance and a fourth distance determined by the position of the second reference point and the position of the fourth reference point.
Optionally, the first distance refers to a distance between the first reference point and the third reference point, and the second distance refers to a distance between the third reference point and a target intersection point; the target intersection point is a line which passes through the third reference point in the direction perpendicular to the surface where the support body is located, and the intersection point of the display device;
The third distance refers to a distance between the second reference point and an orthographic projection of the fourth reference point on the support body, and the fourth distance refers to a distance between the second reference point and a plane where the support body is located.
Optionally, the conference device further includes:
a light emitting part disposed between the connecting body and the supporting body.
An electronic device comprises the conference device.
The conference equipment comprises a display device, a supporting body and a connecting body, wherein the supporting body is used for controlling the display device to display output information; the audio output component outputs audio information through a cavity opening formed on the inclined surface of the connecting body; an included angle is formed between the output direction of the audio information of each audio output component and the plane where the supporting body is located, so that the audio information output by each audio output component can avoid the shielding of the display device and the supporting body, the problem that the sound output by the loudspeaker in the conference machine in the relative technology can be shielded by the display screen and/or the base is solved, and the surrounding three-dimensional sound field of the sound output by the loudspeaker of the conference machine is realized.
Drawings
Fig. 1a is a schematic side view of a conference device provided in an embodiment of the present application;
fig. 1b is a schematic front view of a conference device provided in an embodiment of the present application;
fig. 1c is a schematic rear side view of a conference device provided in an embodiment of the present application;
fig. 2 is a schematic side view of a conference device according to another embodiment of the present application;
fig. 3 is a schematic layout structure of an audio output component of a conference device according to an embodiment of the present application;
fig. 4a is a schematic layout structure of audio output components of a conference device according to another embodiment of the present application;
fig. 4b is a schematic view of sound field intensity corresponding to a layout structure of audio output components of a conference device according to an embodiment of the present application;
fig. 5 is a schematic side view of another conference device according to another embodiment of the present application;
fig. 6 is a schematic side view of another conference device according to another embodiment of the present application;
fig. 7 is a schematic side view of a conference device according to another embodiment of the present application;
FIG. 8 is a side view schematic illustration of another conferencing device according to yet another embodiment of the present application;
1-display device, 2-support, 3-connector, 31-audio output, 4-light emitting.
Detailed Description
So that the manner in which the features and elements of the present embodiments can be understood in detail, a more particular description of the embodiments, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.
An embodiment of the present application provides a conference device, which, as shown in fig. 2, may include:
a display device 1;
a support body 2 on which the display device 1 is disposed; the support body 2 is used for controlling the display device 1 to display output information;
the connecting body 3 is used for connecting the display device 1 and the support body 2, and the connecting body 3 is obliquely arranged on the support body 2 and has an oblique angle with the plane of the support body 2;
in embodiments of the present application, the display device may be a display screen, that is to say the display device is capable of displaying information; of course, the user can also input information to the support body through the touch display device.
Wherein, the connector 3 is provided with a cavity, and at least two audio output components 31 are embedded in the cavity; an included angle is formed between the output direction of the audio information of each audio output component 31 and the plane where the support body 2 is located, so that the audio information output by at least two audio output components 31 avoids the shielding of the display device 1 and the support body 2.
It should be noted that, as shown in fig. 1a, fig. 1b, and fig. 1c, the audio output component of the conference apparatus provided in an embodiment of the present application is disposed in the cavity of the connecting body in a direction perpendicular to the plane of the supporting body, at this time, there is no included angle between the output direction of the audio information and the plane of the supporting body, that is, the output direction of the audio information of the audio output component of the conference apparatus in an embodiment of the present application is parallel to the plane of the supporting body; however, as shown in fig. 1a, 1b and 1c, since the connecting body is obliquely disposed on the supporting body, there is a case where a part of the audio information output by the audio output part is blocked by the display device and/or the supporting body. Correspondingly, after the conference device provided by another embodiment in the present application is adopted, as shown in fig. 2, the audio output component is not disposed in the cavity of the connecting body in the direction perpendicular to the plane of the supporting body, but has an included angle with the direction perpendicular to the plane of the supporting body, that is, an included angle is formed between the output direction of the audio information of the audio output component of the conference device and the plane of the supporting body, so that the situation that the audio information output by the audio output component is blocked by the display device and/or the supporting body can be avoided.
The conference equipment provided by another embodiment of the application comprises a display device, a supporting body used for controlling the display device to display output information, a connecting body arranged on the supporting body and used for connecting the display device and the supporting body, wherein the connecting body is obliquely arranged on the supporting body and forms an oblique angle with a plane where the supporting body is located; the audio output component outputs audio information through a cavity opening formed on the inclined surface of the connecting body; an included angle is formed between the output direction of the audio information of each audio output component and the plane where the supporting body is located, so that the audio information output by each audio output component can avoid the shielding of the display device and the supporting body, the problem that the sound output by the loudspeaker in the conference machine can be shielded by the display screen and/or the base is solved, and the surrounding stereo sound field of the sound output by the loudspeaker of the conference machine is realized.
Based on the foregoing another embodiment, in another embodiment of the present application, as shown in fig. 3, the connecting body 3 has at least two cavities, and two audio output components 31 are respectively disposed in each cavity;
Wherein the audio output components are arranged in an annular array around the axis of the connecting body 3, and the sound fields of the audio output components in two or each adjacent cavities are complementary to form a surrounding stereo field.
It should be noted that the audio output components of the conference equipment are arranged on the connecting body in an annular array around the axis of the connecting body, i.e. the connecting body is provided with audio output components around the entire circumference of the axis. And because the sound fields of two adjacent audio output components or the audio output components in each cavity are complementary, the audio information finally output by all the audio output components can present a surround stereo sound field. Meanwhile, the angle of a sound field which can be covered by each audio output component is about 150 degrees, the sound fields can be overlapped after being spread at a certain distance, the sound intensity is enhanced, and the participators can well listen to the experience within the range of 360 degrees. In one possible implementation, the two cavities are symmetrically spaced 1.5cm apart.
In other embodiments of the present application, fig. 3 shows an exemplary case where the connecting body has two cavities, and four audio output components are disposed on the connecting body; the two cavities may be cavity a1 and cavity a2, respectively, as shown in fig. 3. In one possible implementation, as shown in fig. 3, the sound fields of two audio output components in cavity a1 or two audio output components in cavity a2 are complementary, or the sound fields of two adjacent audio output components in cavity a1 and cavity a2 are complementary.
In other embodiments of the present application, the output port of the first audio output component 311 in two adjacent audio output components 31 disposed in the same cavity is inclined to a direction away from the support body 2, so that a direction in which the first audio output component 311 outputs audio information has a first included angle with a plane in which the support body 2 is located.
It should be noted that fig. 4a is a structural diagram of an audio output component layout of a conference device provided in an embodiment of the present application, and fig. 4b is a size of sound pressure at different positions corresponding to the layout of the audio output component of the conference device provided in the embodiment of the present application; as shown in fig. 4b, after the audio output components of the conference device are arranged according to the setting manner in the embodiment of the present application, the difference between the sound pressure levels at different angles in a 360-degree interval is within 2dB, and the sound pressure level of each audio output component is also above 85dB, which is improved compared with the sound pressure levels of other products.
Wherein, as shown in fig. 5, the first audio output part 311 and the second audio output part 312 are provided in the same cavity; in one possible implementation, the B1 of the first audio output part 311 is inclined to a central position away from the cavity opening, and the B2 of the first audio output part 311 is inclined to a central position close to the cavity opening; that is, the first audio output component can be raised with reference to a plane line horizontal to the plane of the support body 2, so that the output port of the first audio output component 311 is inclined in a direction away from the support body 2; of course, the inclinations at B1 and B2 of the first audio output member 311 are generated in linkage.
In other embodiments of the present application, the output port of the second audio output component 312 in two adjacent audio output components 31 disposed in the same cavity is inclined to a direction close to the support body 2, so that a direction in which the second audio output component 312 outputs audio information has a second included angle with a plane in which the support body 2 is located.
As shown in fig. 5, in one possible implementation, C1 of second audio output component 312 is angled toward a center position near the cavity opening, and C2 of second audio output component 312 is angled away from the center position of the cavity opening; that is, the second audio output unit can be submerged with reference to a plane line horizontal to the plane of the support body 2, so that the output port of the second audio output unit 312 is tilted in a direction close to the support body 2. Of course, the inclinations at C1 and C2 of the second audio output member 312 are generated in linkage.
Wherein the first included angle is complementary to the second included angle.
In one possible implementation, the first angle is complementary to the second angle, so that the audio information output by the first audio output component and the audio information output by the second audio component form a sound field complementary to each other by 180 °. Of course, as shown in fig. 6, a first angle between the output direction of the audio information of the first audio output unit 311 and the surface on which the support is located is 20 degrees, and an angle between the output direction of the audio information of the second audio output unit 312 and the horizontal direction is 20 degrees, that is, a second angle between the output direction of the audio information of the second audio output unit 312 and the surface on which the support is located is 160 degrees; wherein the direction shown by the dotted line is the horizontal direction. It should be noted that the included angles between the output directions of the audio information of the first audio output component and the second audio output component and the direction parallel to the plane of the supporting body can be considered to be the same (the directions parallel to the plane of the supporting body are respectively from the point where the audio information is output by the first audio output component and the second audio output component.
In other embodiments of the present application, an angle between the output direction of the audio information of each audio output component and the plane of the support body is a target angle.
Wherein the target angle is determined based on the position of the first reference point, the position of the second reference point, the position of the third reference point, and the position of the fourth reference point; the first reference point and the second reference point are diametrically opposed points of the audio output part, and the third reference point and the fourth reference point are diametrically opposed points of the display device.
In other embodiments of the present application, as shown in FIG. 7, the first reference point may be point D1 on the audio output component and the second reference point may be point D2 on the audio output component; the third reference point may be a point D3 on the display device, and the fourth reference point may be a point D4 on the display device; of course, the positions of the first, second, third and fourth reference points are illustrated in FIG. 7 by way of example only; any other position is also possible which corresponds to the characteristics of the first, second, third and fourth reference points defined in the present application. Wherein when the audio information output by the audio output component is transmitted to the position where the orthographic projection of the fourth reference point on the support body is located, the sound is reflected; at this time, the audio information is reflected by the support body and then emitted, so that the audio information can be prevented from being shielded by the D4 position of the display device.
In other embodiments of the present application, the target angle is determined based on a first reference angle and a second reference angle; the first reference angle is obtained by calculating a first distance and a second distance determined by the position of the first reference point and the position of the third reference point; the second reference angle is obtained by calculating a third distance and a fourth distance determined from the position of the second reference point and the position of the fourth reference point.
In other embodiments of the present application, the first distance refers to a distance between the first reference point and the third reference point, and the second distance refers to a distance between the third reference point and the target intersection point; the target intersection point is a line which passes through a third reference point in the direction vertical to the surface where the support body is located and an intersection point of the display device;
the third distance refers to the distance between the second reference point and the orthographic projection of the fourth reference point on the support body, and the fourth distance refers to the distance between the second reference point and the surface of the support body.
Wherein, as shown in fig. 7, the first distance may be a distance L1 determined from the positions of the first reference point and the third reference point, the second distance may be a distance H1 determined from the position of the third reference point, the third distance may be a distance L2 determined from the positions of the second reference point and the fourth reference point, and the fourth distance may be a distance H2 determined from the positions of the second reference point and the support body; in one possible implementation, the first reference angle may be found using an arcsine function using the dimensions of L1 and H1, and the second reference angle may be found using an arcsine function using the dimensions of L2 and H2. An angle may be selected as the target angle between the angles a and B, thereby ensuring that the range of the audio output means from which audio information is effectively output is not obstructed by the display device. In one possible implementation, the smallest angle of the first reference angle and the second reference angle may be selected as the target angle. It should be noted that, as shown in fig. 7, since the audio information output by the second audio output component is most affected by the shielding of the display device and the support, the first distance, the second distance, the third distance, and the fourth distance may be calculated with reference to the second audio output component; that is, the target angle determined based on the second audio output component may be an angle between the output direction of the audio information of the first audio output component and the surface on which the support is located, and at this time, the angle between the output direction of the audio information of the second audio output component and the surface on which the support is located may be an angle complementary to the target angle. Of course, the target angle may be determined with reference to the first audio output means. It should be noted that when it is uncertain that the audio information of the audio output component is shielded by the display device and the support, a plurality of audio output components can be arbitrarily selected as reference for calculating the target angle; at this time, on the premise that the audio information of the audio output components is not shielded by the display device and the support body, the included angle between the output direction of the audio information of the plurality of audio output components and the surface where the support body is located can be calculated, and then the reference target angle is determined according to the audio output component with the largest influence, and the corresponding audio output component selects the supplementary angle.
In one possible implementation, the first reference angle a is ASIN (H1/L1) and the second reference angle B is ASIN (H2/L2). Of course, it is also possible to determine other edges in the corresponding triangle, and use other inverse trigonometric functions (e.g., inverse tangent trigonometric function, inverse cosine trigonometric function, and inverse cosine trigonometric function) corresponding to the other edges to calculate the first reference angle and the second reference angle.
In other embodiments of the present application, the target angle determined by using the information provided in another embodiment of the present application is complementary to an angle between the connection body and the plane where the support body is located, that is, an angle of 90 degrees is formed between the output direction of the audio information of the audio output component and the inclination direction of the connection body, in a feasible implementation manner, an angle between the output direction of the audio information of each audio output component in the cavity of the connection body and the inclination direction of the connection body is 90 degrees. At the moment, the output direction of the audio information of each audio output component is parallel to the direction of the surface where the display device is located, and the audio information emitted to the supporting body can be reflected out through the supporting body, so that the audio information output by the audio output components is not shielded by the display device and the supporting body, and a surrounding stereo sound field is formed.
In other embodiments of the present application, as shown with reference to fig. 8, the conference device further includes:
a light emitting member 4, the light emitting member 4 being disposed between the connecting body 3 and the supporting body 2.
The conference equipment provided by the embodiment of the application comprises a display device, a supporting body and a connecting body, wherein the supporting body is used for controlling the display device to display output information, the display device is arranged on the supporting body, the connecting body is used for connecting the display device and the supporting body, the connecting body is obliquely arranged on the supporting body, an oblique angle is formed between the connecting body and the plane where the supporting body is located, the connecting body is provided with a cavity, and at least two audio output components are embedded in the cavity; the audio output component outputs audio information through a cavity opening formed on the inclined surface of the connecting body; an included angle is formed between the output direction of the audio information of each audio output component and the plane where the supporting body is located, so that the audio information output by each audio output component can avoid the shielding of the display device and the supporting body, the problem that the sound output by the loudspeaker in the conference machine can be shielded by the display screen and/or the base is solved, and the surrounding stereo sound field of the sound output by the loudspeaker of the conference machine is realized.
Based on the foregoing embodiments, embodiments of the present application provide an electronic device, which may include a conference device as provided in the embodiments corresponding to fig. 2, 5 to 8.
In the description of the present application, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," "some examples," or "other examples of the present application," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this application, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" or "connected" and the like are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The components described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.
In addition, all the functional units in the embodiments of the present application may be integrated into one processing module, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit.
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 of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The features disclosed in several of the apparatus embodiments provided herein may be combined in any combination to yield new product embodiments without conflict.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A conferencing device, the conferencing device comprising:
a display device;
a support on which the display device is disposed; the support body is used for controlling the display device to display output information;
the connecting body is used for connecting the display device and the support body, is obliquely arranged on the support body, and has an oblique angle with the plane where the support body is located;
the connecting body is provided with a cavity, and at least two audio output components are embedded in the cavity; the audio output component outputs audio information through a cavity opening formed on the inclined surface of the connecting body; an included angle is formed between the output direction of the audio information of each audio output component and the plane where the support body is located, so that the audio information output by the at least two audio output components avoids the shielding of the display device and the support body.
2. The conference device as claimed in claim 1, wherein said connecting body has at least two cavities, and each cavity has two audio output components;
the audio output components are arranged in an annular array mode around the axis of the connecting body, and sound fields of the audio output components in two or each adjacent cavities are complementary to form a surrounding stereo sound field.
3. The conference device as claimed in claim 1, wherein the output port of the first audio output component of the two adjacent audio output components disposed in the same cavity is inclined to a direction away from the support body, so that a first included angle is formed between the direction of the audio information output by the first audio output component and the plane of the support body.
4. The conference device as claimed in claim 3, wherein the output port of the second audio output component of the two adjacent audio output components disposed in the same cavity is inclined to a direction close to the support body, so that a second included angle is formed between the direction of the audio information output by the second audio output component and the plane of the support body.
5. The conferencing device of claim 4, the first angle being complementary to the second angle.
6. The conferencing device of claim 1, wherein,
an included angle between the output direction of the audio information of each audio output component and the plane where the support body is located is a target angle; wherein the target angle is determined based on the position of the first reference point, the position of the second reference point, the position of the third reference point, and the position of the fourth reference point; the first reference point and the second reference point are diametrically opposite points of the audio output part, and the third reference point and the fourth reference point are diametrically opposite points of the display device.
7. The conferencing device of claim 6, wherein,
the target angle is determined based on a first reference angle and a second reference angle; the first reference angle is obtained by calculating a first distance and a second distance determined by the position of the first reference point and the position of the third reference point; the second reference angle is obtained by calculating a third distance and a fourth distance determined by the position of the second reference point and the position of the fourth reference point.
8. The conferencing device of claim 7, wherein,
The first distance refers to a distance between the first reference point and the third reference point, and the second distance refers to a distance between the third reference point and a target intersection point; the target intersection point is a line which passes through the third reference point in the direction perpendicular to the surface where the support body is located, and the intersection point of the display device;
the third distance refers to a distance between the second reference point and an orthographic projection of the fourth reference point on the support body, and the fourth distance refers to a distance between the second reference point and a plane where the support body is located.
9. The conferencing device of claim 1, further comprising:
a light emitting part disposed between the connecting body and the supporting body.
10. An electronic device comprising a conferencing device as claimed in any of claims 1 to 9.
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| CN202010622669.XA CN111796635B (en) | 2020-06-30 | 2020-06-30 | Conference equipment and electronic equipment |
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| CN202010622669.XA CN111796635B (en) | 2020-06-30 | 2020-06-30 | Conference equipment and electronic equipment |
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