CN109788414B

CN109788414B - Working method of projection type audio and video integrated equipment

Info

Publication number: CN109788414B
Application number: CN201910067374.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shenzhen New Boundless Technology Co Ltd
Current assignee: Shenzhen new boundless Technology Co., Ltd
Priority date: 2016-07-01
Filing date: 2016-07-01
Publication date: 2020-12-01
Anticipated expiration: 2036-07-01
Also published as: CN106101949B; CN106101949A; CN109788414A

Abstract

The invention provides holographic projection type audio and video integrated equipment which comprises a shell, wherein a circuit board is arranged in the shell; an annular permanent magnet seat magnetized along the axial direction is fixed on the circuit board, and a voice coil is matched in the permanent magnet seat; the voice coil is sleeved at the rear end of a transparent connecting pipe which extends into the permanent magnet seat and is coaxial with the permanent magnet seat, and the front end of the connecting pipe is forwards connected to the center of the horn-shaped arc holographic projection membrane on the front surface of the shell; the circuit board is also provided with a projection lens which is coaxial with the connecting pipe, the front end of the lens is also connected with a wide-angle lens group which extends into the connecting pipe and can refract the light rays projected forwards by the projection lens, penetrate through the connecting pipe without being blocked and cast full of a whole holographic projection membrane; the voice coil and the projection lens are respectively and electrically coupled to the audio and video output modules on the circuit board. The projection type audio and video integrated equipment is small in size, convenient to carry and capable of providing sufficient and full and bright volume.

Description

Working method of projection type audio and video integrated equipment

Technical Field

The invention relates to the field of multimedia equipment, in particular to audio and video equipment.

Background

For the current multimedia equipment, mainly comprising audio and video equipment, a display screen and a loudspeaker must be arranged, and the loudspeaker needs to be arranged on the side surface of a display because the display screen cannot shield the loudspeaker, so that the volume of the current audio and video playing equipment is difficult to reduce; especially for some portable devices, if a large volume-adjustable device needs to be ensured, the volume of the speaker is considerable, and after the speaker is arranged in parallel with the display screen, the overall volume of the device is huge and is difficult to carry.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a projection type audio/video integrated device, which has a small volume and is convenient to carry and can provide a full and bright volume.

The technical scheme adopted by the invention for solving the technical problems is as follows: the projection type audio and video integrated equipment comprises a shell, wherein a circuit board is arranged in the shell; an annular permanent magnet seat magnetized along the axial direction is fixed on the circuit board, and a voice coil capable of vibrating along the axial direction of the permanent magnet seat under the electromagnetic acting force is matched in the permanent magnet seat; the voice coil is sleeved at the rear end of a transparent connecting pipe which extends into the permanent magnet seat and is coaxial with the permanent magnet seat, and the front end of the connecting pipe is forwards connected to the center of the horn-shaped arc holographic projection membrane on the front surface of the shell; the periphery of the holographic projection membrane is connected to the shell through a rubber ring; the circuit board is also provided with a projection lens which is coaxial with the connecting pipe, the front end of the lens is also connected with a wide-angle lens group, the wide-angle lens group extends into the connecting pipe, can refract the light projected forwards by the projection lens, passes through the connecting pipe without being blocked, and is fully cast with the whole holographic projection membrane; the voice coil and the projection lens are respectively and electrically coupled to the audio and video output modules on the circuit board.

Preferably, a section of silicon steel pipe is arranged at the part, opposite to the voice coil, of the inner wall of the connecting pipe, and the length of the silicon steel pipe is ensured not to shield the light cone; thereby strengthening the magnetic field formed by the voice coil to improve the electromagnetic force.

Preferably, a conical cover is further fixed behind the holographic projection film, the conical cover surrounds the periphery of a light cone projected by the wide-angle lens group, and the inner surface of the conical cover surface facing the light cone is white; the conical cover not only reflects the illumination reflected backwards by the holographic projection film forwards again so as to ensure the brightness of the holographic projection film, but also can shield internal parts of equipment behind the holographic projection film so as to prevent the internal parts from influencing vision.

The invention has the beneficial effects that: when the projection type audio and video integrated equipment works, the holographic projection membrane is adopted to directly form the vibrating membrane of the loudspeaker, so that the holographic projection membrane can be used as a large-area loudspeaker vibrating membrane while displaying videos, and sufficient and bright volume can be provided; therefore, the display unit and the loudspeaker unit are completely integrated, the problem of mutual shielding does not exist, and the whole volume of the equipment is greatly simplified.

Drawings

Fig. 1 is a schematic forward view of the projection audio and video integrated device;

fig. 2 is a schematic structural diagram of a first embodiment of the projection type audio and video integrated device;

fig. 3 is a schematic structural diagram of a second embodiment of the projection type audio/video integrated device.

Detailed Description

The invention is further illustrated with reference to the following figures and examples:

the first embodiment is as follows:

in the first embodiment shown in fig. 1 and fig. 2, the projection type audio and video integrated device comprises a housing 1, wherein a circuit board 2 is arranged inside the housing 1; an annular permanent magnet seat 3 magnetized along the axial direction is fixed on the circuit board 2, and a voice coil 4 capable of vibrating along the axial direction of the permanent magnet seat 3 under the electromagnetic acting force is matched inside the permanent magnet seat 3; the voice coil 4 is sleeved at the rear end of a transparent connecting pipe 41 which extends into the permanent magnet seat 3 and is coaxial with the permanent magnet seat 3, and the front end of the connecting pipe 41 is forwards connected to the center of the horn-shaped arc holographic projection membrane 5 on the front surface of the shell 1; the periphery of the holographic projection membrane 5 is connected to the shell 1 through a rubber ring 51; the circuit board 2 is also provided with a projection lens 6 which is coaxial with the connecting pipe 41, the front end of the lens 6 is also connected with a wide-angle lens group 61, the wide-angle lens group 61 extends into the connecting pipe 41, can refract the light projected forward by the projection lens 6, passes through the connecting pipe 41 without being blocked, and is fully projected to the whole holographic projection membrane 5; the voice coil 4 and the projection lens 6 are electrically coupled to the audio and video output modules on the circuit board 2, respectively.

In addition, a section of silicon steel pipe can be arranged at the part, opposite to the voice coil 4, of the inner wall of the connecting pipe 41, and the length of the silicon steel pipe is ensured not to shield the light cone; thereby strengthening the magnetic field formed by the voice coil 4 to improve the electromagnetic force.

When the projection type audio and video integrated equipment works, the holographic projection membrane 5 is adopted to directly form the loudspeaker diaphragm, so that the holographic projection membrane 5 can be used as a large-area loudspeaker diaphragm while displaying videos, and sufficient and bright volume can be provided; therefore, the display unit and the loudspeaker unit are completely integrated, the problem of mutual shielding does not exist, and the whole volume of the equipment is greatly simplified.

Example two:

in the second embodiment shown in fig. 3, different from the first embodiment, a conical cover 7 is further fixed behind the holographic projection film 5, the conical cover 7 surrounds the periphery of the light cone projected by the wide-angle lens group 61, and the inner surface of the conical cover 7 facing the light cone is white, which may be a white diffuse reflection surface; therefore, the cone cover 7 not only reflects the light reflected backward by the holographic projection film 5 forward again to ensure the brightness of the holographic projection film 5, but also can shield the internal parts of the equipment behind the holographic projection film 5 to prevent the internal parts from affecting the vision.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

Claims

1. A working method of a projection type audio and video integrated device comprises a shell (1), wherein a circuit board (2) is arranged inside the shell (1); the method is characterized in that: an annular permanent magnet seat (3) magnetized along the axial direction is fixed on the circuit board (2), and a voice coil (4) capable of vibrating along the axial direction of the permanent magnet seat under the electromagnetic acting force is matched in the permanent magnet seat (3); the voice coil (4) is sleeved at the rear end of a transparent connecting pipe (41) which extends into the permanent magnet seat (3) and is coaxial with the permanent magnet seat (3), and the front end of the connecting pipe (41) is forwards connected to the center of a horn-shaped arc holographic projection membrane (5) on the front surface of the shell (1);

the periphery of the holographic projection membrane (5) is connected to the shell (1) through a rubber ring (51); the circuit board (2) is also provided with a projection lens (6) which is coaxial with the connecting pipe (41), the front end of the lens is also connected with a wide-angle lens group (61), the wide-angle lens group (61) extends into the connecting pipe (41), can refract the light projected forwards by the projection lens (6), passes through the connecting pipe (41) without being blocked and is fully projected to the whole holographic projection membrane (5); the voice coil (4) and the projection lens (6) are electrically coupled to the audio and video output module on the circuit board (2) respectively;

the working method comprises the following steps: when the loudspeaker diaphragm works, the holographic projection diaphragm (5) directly forms the loudspeaker diaphragm, so that the holographic projection diaphragm (5) can be used as a large-area loudspeaker diaphragm to provide sufficient volume while displaying video.

2. The method of operation of claim 1, wherein: a conical cover (7) is further fixed behind the holographic projection membrane (5), the conical cover (7) surrounds the periphery of a light cone projected by the wide-angle lens group (61), and the inner surface of the conical cover (7) facing the light cone is white.