CN219066425U

CN219066425U - Projection device

Info

Publication number: CN219066425U
Application number: CN202222976174.4U
Authority: CN
Inventors: 于光; 岳增旭; 周强; 高文婕
Original assignee: Beijing Rockrobo Technology Co Ltd; Shenzhen Luoke Innovation Technology Co Ltd
Current assignee: Beijing Rockrobo Technology Co Ltd; Shenzhen Luoke Innovation Technology Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-05-23
Anticipated expiration: 2032-11-08

Abstract

The present disclosure provides a projection apparatus, the projection apparatus comprising: the shell, the loudspeaker, the microphone and the radiator fan are arranged in the shell, and the distance between the microphone and the radiator fan is smaller than the distance between the microphone and the loudspeaker. The microphone is used for collecting voice instructions of a user and noise signals generated by the projection device, and the loudspeaker is used for playing audio signals and noise reduction signals corresponding to the noise signals.

Description

Projection device

Technical Field

The present disclosure relates to a projection apparatus.

Background

With the development of projection technology, projection devices are increasingly used in people's work and life, for example, many families choose to use projection devices as viewing devices, so that the occupation of the home space can be reduced while enjoying a large screen.

Noise generated when the projection device operates, such as noise generated by a cooling fan, wind noise generated when cooling airflow flows through the inside of a body of the projection device, or noise generated by electronic parts due to high-frequency operation, is easy to cause interference to a user, and is not beneficial to improving the use experience of the user. Thus, active noise reduction of a projection device is an important development direction of the projection device.

Disclosure of Invention

The embodiment of the disclosure provides a projection device, comprising: the device comprises a shell, a loudspeaker, a microphone and a radiator fan, wherein the loudspeaker, the microphone and the radiator fan are all arranged in the shell, the distance between the microphone and the radiator fan is smaller than that between the microphone and the loudspeaker, the microphone is used for collecting voice instructions of a user and noise signals generated by the projection device, and the loudspeaker is used for playing audio signals and noise reduction signals corresponding to the noise signals.

In an alternative embodiment, the distance between the microphone and the speaker is greater than or equal to half the length of the projection device along the length direction of the projection device, wherein the length direction is the same as the projection direction of the projection device.

In an alternative embodiment, the distance between the microphone and the cooling fan is less than or equal to half the width of the projection device along the width direction of the projection device.

In an alternative embodiment, the distance between the microphone and the cooling fan is greater than or equal to one third of the width of the projection device and less than or equal to one half of the width of the projection device along the width direction of the projection device.

In an alternative embodiment, the distance between the microphone and the speaker is equal to the distance between the heat radiation fan and the speaker along the length direction of the projection device.

In an alternative embodiment, the projection device includes: the first side and the second side of relative setting, first side is towards the one side of projection direction, the speaker sets up the second side.

In an alternative embodiment, the projection device further comprises: and the third side and the fourth side are oppositely arranged, and the cooling fan is arranged at one end of the third side or the fourth side, which is close to the first side.

In an alternative embodiment, the number of microphones is plural, and the distance between each microphone and the radiator fan is smaller than the distance between the microphone and the speaker.

In an alternative embodiment, the number of the microphones is three, the three microphones are arranged around a central point, and the distances between any two microphones are equal.

In an alternative embodiment, the number of the loudspeakers is two, and the distance between the center point and the two loudspeakers is equal.

The foregoing description is merely an overview of the technical solutions provided by the present disclosure, and may be implemented according to the content of the specification in order to make the technical means of the present disclosure more clearly understood, and in order to make the above and other features and effects of the present disclosure more clearly understood, the following embodiments of the present disclosure are specifically described.

Drawings

FIG. 1 is a schematic diagram of an exemplary projection device according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a device position relationship in an embodiment of the disclosure.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It is noted that in the drawings, the size of elements may be exaggerated for clarity of illustration. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It should be noted that the term "plurality" appearing herein includes two or more cases. The terms "first," "second," "third," and the like are used merely as labels, and are not intended to limit the number of their objects and their ordinal relationship. The terms "front", "rear", "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, which may be changed accordingly when the absolute position of the object to be described is changed.

The embodiment of the disclosure provides a projection device, which is beneficial to simplifying the structure of the projection device and reducing the hardware cost by arranging the position relation among a microphone, a loudspeaker and a cooling fan so as to multiplex the microphone and the loudspeaker to realize active noise reduction of the projection device. For example, the projection device may be a projector or other electronic apparatus having a projection function.

As shown in fig. 1, a projection apparatus 10 provided in an embodiment of the present disclosure may include: a housing 100, a microphone 110, a speaker 120, and a heat radiation fan 130. Speaker 120, microphone 110, and cooling fan 130 are all disposed within housing 100. The distance between the microphone 110 and the heat radiation fan 130 is smaller than the distance between the microphone 110 and the speaker 120. This can both bring the microphone 110 close to the main noise source of the projection device 10, i.e. the cooling fan 130, and reduce the influence of the output audio of the speaker 120 on the noise collection of the microphone 110, so as to multiplex the microphone 110 and the speaker 120 to realize active noise reduction of the projection device 10.

In use, the microphone 110 is used to collect user voice commands and noise signals generated by the projection device 10. The multiplexing microphone 110 can enable the projection device 10 to perform corresponding operation according to the voice instruction of the user, and can generate a noise reduction signal with the same amplitude and opposite phase to the noise signal according to the active noise reduction principle. The active noise reduction principle is as follows: all sounds consist of a certain frequency spectrum which can be cancelled out if a sound can be found which is identical in frequency spectrum to the noise to be cancelled, in opposite phase (i.e. 180 deg. out of phase).

The speaker 120 is used for playing the audio signal and the noise reduction signal corresponding to the noise signal. For example, the generated noise reduction signal may be superimposed in the output signal of the speaker 120. The multiplexing speaker 120 can ensure that the user hears the audio output by the projection device 10, and can cancel noise generated by the projection device 10, so as to improve the sound effect of the projection device 10.

It will be appreciated that the projection device 10 may include other components, such as a light engine, a processor, a memory, etc., in addition to the components described above, and will not be described in detail herein.

In order to sufficiently transmit the noise reduction signal to the user and reduce the noise level, the speaker 120 may be disposed as close to the user as possible. It is contemplated that in some application scenarios, the user is typically located behind the projection device 10. The term "rear" as used herein refers to a direction opposite to the projection direction. Thus, in some examples, speaker 120 may be positioned on a side of projection device 10 facing away from the direction of projection and toward the rear of projection device 10, with reference to the user being positioned behind projection device 10. In order to minimize the influence of noise generated by the cooling fan 130 and blown hot air on the user, the cooling fan 130 may be disposed as far as possible from the user, that is, as far as possible from the speaker 120, when the installation condition is satisfied.

As shown in fig. 1, the projection apparatus 10 may include: a first side 101, a second side 102, a third side 103 and a fourth side 104. Wherein the first side 101 and the second side 102 are opposite sides, and the third side 103 and the fourth side 104 are opposite sides. The first side 101 is the side facing the projection direction, i.e. the side facing the projection screen, and the second side 102 is the side facing away from the projection direction. For example, in an actual usage scenario, if the first side 101 and the second side 102 are referred to as the front side and the rear side, respectively, the third side 103 and the fourth side 104 may be referred to as the left side and the right side, respectively. At this time, the speaker 120 may be disposed at the second side 102 to be fitted with a sound outlet provided on the housing 100. The cooling fan 130 may be disposed at an end of the third side 103 or the fourth side 104 near the first side 101, and is adapted to a cooling port disposed on the housing 100, and is configured to exhaust air toward the left side or the right side.

Assume that a direction perpendicular to the first side 101 and the second side 102 is taken as a length direction of the projection apparatus 10 (a y-axis direction in a coordinate system shown in fig. 1), a direction perpendicular to the third side 103 and the fourth side 104 is taken as a width direction of the projection apparatus 10 (an x-axis direction in a coordinate system shown in fig. 1), and a direction perpendicular to the top surface and the bottom surface is taken as a height direction of the projection apparatus 10 (a z-axis direction in a coordinate system shown in fig. 1). The longitudinal direction is the same as the projection direction of the projection device 10. In some examples, microphone 110 may be a distance from speaker 120 that is greater than or equal to half the length of projection device 10 in a length direction such that microphone 110 is as far from speaker 120 as possible.

In some examples, to keep microphone 110 as close to radiator fan 130 as possible, away from speaker 120, the distance in the length direction between microphone 110 and speaker 120 may be equal to the distance in the length direction between radiator fan 130 and speaker 120. In some examples, the distance between the microphone 110 and the cooling fan 130 in the width direction may be less than or equal to half the width of the projection device 10.

In the above description of the positional relationship, the center position of the rotation axis of the heat radiation fan 130 may be used as a positional reference of the heat radiation fan 130 in the projection device 10.

The number of microphones 110 may be set according to actual requirements, and may be one or more, which is not limited in this embodiment. When there are a plurality of microphones 110, the distance between each microphone 110 and the heat radiation fan 130 is smaller than the distance between the speaker 120. For example, the plurality of microphones 110 may be arranged at intervals along a straight line, or may be arranged around a center point, and in this case, the positions of the microphones 110 may refer to the center point positions of the plurality of microphones 110.

In some examples, the number of microphones 110 is three, three microphones 110 are disposed about a center point, and the distances between any two microphones 110 are equal. For example, as shown in fig. 1, the connection lines of the three microphones 110 may be similar to form an equilateral triangle, and the three microphones 110 are respectively located at three vertexes of the equilateral triangle and are arranged around the center point of the equilateral triangle.

The number of speakers 120 may be set according to actual requirements, and may be one or more, which is not limited in this embodiment. For example, as shown in fig. 1, the number of speakers 120 may be two, and two speakers 120 may be disposed at each end of the second side 102 of the projection device 10.

Taking the three microphones 110 and the two speakers 120 described above as examples, in some examples, the distances between the center points of the three microphones 110 and the two speakers 120 may be equal. Thus, the distance between the microphone 110 array and the loudspeaker 120 is as large as possible, and the distance difference between the same microphone 110 and different loudspeakers 120 can be reduced, so that the influence of the loudspeaker 120 on the noise collection of the microphone 110 is reduced, the accuracy of the read noise signals is improved, the accuracy of the generated noise signals is improved, and a better noise reduction effect is achieved.

For example, fig. 2 shows an orthographic schematic view of microphone 110, radiator fan 130, and speaker 120 on the bottom surface of projector housing 100. In fig. 2, taking two speakers 120 as an example, a point Pm represents the front projection position of the microphone 110, a point Pm represents the front projection position of the heat radiation fan 130, and points PL1 and PL2 represent the front projection positions of the two speakers 120, respectively. L0 represents the length of the projection device 10, and L1 represents the distance between the microphone 110 and the radiator fan 130 and the speaker 120 in the length direction, i.e., the y-axis direction; d0 denotes the width of the projection device 10, and D1 denotes the distance between the microphone 110 and the cooling fan 130 in the width direction, i.e., the x-axis direction. d1 and d2 represent the distances of microphone 110 from two speakers 120, respectively. For example, D1 may be greater than or equal to one third of D0 and less than or equal to one half of D0; l1 is greater than or equal to half of L0; d1 may be equal to d2.

Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure is limited to these examples; combinations of features of the above embodiments or in different embodiments are also possible within the spirit of the present disclosure, steps may be implemented in any order, and there are many other variations of the different aspects of one or more embodiments of the present disclosure as described above, which are not provided in detail for the sake of brevity.

While exemplary embodiments of the present disclosure have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including exemplary embodiments and all such alterations and modifications as fall within the scope of the disclosure.

Claims

1. A projection apparatus, comprising: casing (100), speaker (120), microphone (110) and radiator fan (130) all set up in casing (100), microphone (110) with distance between radiator fan (130) is less than microphone (110) with distance between speaker (120), microphone (110) are used for gathering user's voice command and the noise signal that projection arrangement produced, speaker (120) are used for broadcasting audio signal and noise reduction signal that noise signal corresponds.

2. The projection device of claim 1, wherein a distance between the microphone (110) and the speaker (120) along a length direction of the projection device is greater than or equal to half a length of the projection device, wherein the length direction is the same as a projection direction of the projection device.

3. The projection device of claim 1, wherein a distance between the microphone (110) and the heat radiation fan (130) is less than or equal to half of a width of the projection device in a width direction of the projection device.

4. A projection device according to claim 3, characterized in that the distance between the microphone (110) and the radiator fan (130) in the width direction of the projection device is greater than or equal to one third of the width of the projection device and less than or equal to one half of the width of the projection device.

5. Projection apparatus according to claim 1, characterized in that the distance between the microphone (110) and the loudspeaker (120) is equal to the distance between the radiator fan (130) and the loudspeaker (120) in the length direction of the projection apparatus.

6. The projection device of claim 1, wherein the projection device comprises: a first side (101) and a second side (102) which are oppositely arranged, wherein the first side (101) is a side facing the projection direction, and the loudspeaker (120) is arranged on the second side (102).

7. The projection device of claim 6, further comprising: -a third side (103) and a fourth side (104) arranged opposite each other, -said cooling fan (130) being arranged at an end of said third side (103) or said fourth side (104) close to said first side (101).

8. The projection device of claim 1, wherein the plurality of microphones (110) is provided, and a distance between each of the microphones (110) and the cooling fan (130) is smaller than a distance between the speaker (120).

9. Projection apparatus according to claim 8, wherein said microphones (110) are three, three of said microphones (110) being arranged around a central point, the distance between any two of said microphones (110) being equal.

10. Projection apparatus according to claim 9, characterized in that said loudspeakers (120) are two, the distance between said centre point and two of said loudspeakers (120) being equal.