Screen electromagnetic vibration device applied to laser light source projection and capable of eliminating speckle

A technology of laser light source and electromagnetic vibration, applied in projection devices, optics, optical components, etc., can solve the problems of high equipment cost, vibration energy loss, and soft vibration transmission medium, and achieve short vibration transmission distance, low vibration energy loss, The effect of long service life

CN108845477APending Publication Date: 2018-11-20WUHU STAR IMAX
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-20

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    Figure 1
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    Figure 3
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Abstract

The invention relates to a screen electromagnetic vibration device applied to laser light source projection and capable of eliminating a speckle, comprising a screen, a plurality of vibration units are uniformly arranged on the back of the screen and can drive the screen to vibrate by virtue of an electromagnetic force, so as to eliminate the speckle; the vibration units can be of a contact structure directly pushing the screen to vibrate, and the contact structure comprises an electromagnetic coil, a vibration transmission layer, a vibration transmission block and a vibrating reed; and the vibration units also can be of a non-contact structure indirectly driving the screen to vibrate, and the non-contact structure comprises an electromagnetic coil and a permanent magnet block. The screenelectromagnetic vibration device provided by the invention adopts the electromagnetic force for directly pushing or indirectly driving the screen to vibrate, is better in laser speckle eliminating effect and has the advantages of simple structure, convenience in mounting, almost no damage and long service life.
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Description

technical field

[0001] The invention relates to the technical field of laser light source projection screens, in particular to a screen electromagnetic vibration device applied to laser light source projection to eliminate speckles. Background technique

[0002] With the development of film technology, film projectors have developed from film projection in the past to digital projection, and now laser light source projection technology is widely used in theaters. Laser light source projection technology has excellent color reproduction, vividness, and long life. Industry advantages such as high resolution and high image resolution are gradually occupying the film screening market, bringing audiences a brand-new viewing experience.

[0003] However, due to the limitations of the technical conditions of the laser projector at this stage, the laser light is projected and reflected on the surface of the screen to cause light interference, thus forming irregularly distributed gra...

Examples

Embodiment 1

[0036] like Figure 1 to Figure 3 As shown, a screen electromagnetic vibration device applied to laser light source projection to eliminate speckle, including a screen 1, the back of the screen 1 is provided with a vibration unit 2 that drives the screen to vibrate by electromagnetic force to eliminate speckle, and the vibration unit 2 There are several evenly arranged on the screen 1 .

[0037] The vibration unit 2 is a contact structure 21 that directly drives the screen to vibrate.

[0038] The contact structure 21 includes an electromagnetic coil 211, a vibration transmission layer 212 connected to the screen 1, a vibration transmission block 213 connected to the vibration transmission layer 212, one end connected to the vibration transmission block 213 and the other end connected to the electromagnetic coil 211. The vibrating reed 214 on.

[0039] The vibrating reed 214 is arranged parallel to 1 cm in front of the magnetic generating end 211 a of the electromagnetic coi...

Embodiment 2

[0050] like Figure 4 , Figure 5 As shown, a screen electromagnetic vibration device applied to laser light source projection to eliminate speckle, including a screen 1, the back of the screen 1 is evenly distributed with several vibration units 2 that drive the screen to vibrate by electromagnetic force to eliminate speckle. The vibration units 2 are distributed in a lattice arrangement.

[0051] The vibration unit 2 is a non-contact structure 22 that indirectly drives the screen to vibrate.

[0052] The vibration units 2 are arranged at equal intervals on the upper and lower sides or around the screen 1 .

[0053]The non-contact structure 22 includes an electromagnetic coil 211, a permanent magnet block 221 connected to the back of the screen 1 and placed above the magnetic generating end 211a of the electromagnetic coil 211; the permanent magnetic block 221 is located at the magnetic generating end 211a of the electromagnetic coil 211 1cm above.

[0054] One end of the...