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

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.

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...

AI Technical Summary

Problems solved by technology

[0007] The equipment cost of the above method is too high, and it is generally only suitable for large-scale screens in cinema halls, and the vibration transmission distance of the screen is too long or the vibration transmission medium is too soft, which will cause loss of vibration energy, thereby affecting the overall elimination effect of laser speckle; Secondly, the above method of eliminating laser speckle will inevitably generate equipment noise, which will affect the sound effect of the theater projection. Therefore, the above solutions have shortcomings and cannot meet the needs of social development.

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