Methods and systems of vibrating a screen
AssigneeImax Europe SA
InventorsHamed Herati, Denis Gilles Tremblay, Oliver Nicholas Komarnycky
Life of this patent
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Abstract
Screen vibration systems are provided that can vibrate theatre screens using acoustical, electromagnetic, or another type of energy while reducing the presence of image artifacts that may otherwise be visible as result of vibrating the screen. In one example of a screen vibration system, the system includes a screen, a permanent magnet mounted to the screen, and a magnetic source positioned with respect to the permanent magnet and uncoupled from the screen. The screen is moveable in response to a changing magnetic field from the magnetic source.
Claims39
A screen vibration system, comprising:
- a screen;
- a permanent magnet mounted to the screen;
- and
- a magnetic source positioned with respect to the permanent magnet and uncoupled from the screen,
- wherein the screen is moveable in response to a changing magnetic field from the magnetic source.
A method to vibrate a screen, the method comprising:
- mounting a permanent magnet onto the screen;
- positioning an electromagnet across from the permanent magnet;
- and
- controlling an electric current to the electromagnet to successively repel and attract the permanent magnet to cause the screen to vibrate.
The method of claim wherein the electric current has a frequency that is random.
A system to vibrate a screen, the system comprising:
- a first actuator positioned proximate the screen at a first location for moving the screen at the first location based on a first electric signal;
- and
- a second actuator positioned proximate the screen at a second location for moving the screen at the second location based on a second electric signal that is uncorrelated with respect to the first electric signal.
A method for vibrating a screen, the method comprising:
- positioning a first electromechanical acoustic actuator and a second electromechanical acoustic actuator behind the screen;
- driving the first electromechanical acoustic actuator using a first electric signal;
- driving the second electromechanical acoustic actuator using a second electric signal that is de-correlated with respect to the first electric signal;
- and
- causing the screen to vibrate by the first electromechanical acoustic actuator and the second electromechanical acoustic actuator.
A method for reducing speckle artifacts, the method comprising:
- vibrating a screen by a screen vibrator;
- capturing information about a projected image on the screen using a sensor;
- determining an amount of speckle artifacts present in the projected image on the screen from the captured information;
- and
- in response to comparing the amount of speckle artifacts to a predetermined threshold, controlling a signal to a controller that drives the screen vibrator.
A system to vibrate a screen, the system comprising:
- an electromechanical acoustical actuator with an open baffle, the electromechanical acoustical actuator being uncoupled from the screen in an operational setup;
- and
- a controller to provide an electrical signal to the electromechanical acoustical actuator for causing the electromechanical acoustical actuator to output energy to displace air that is (i) in front of the electromechanical acoustical actuator and (ii) between the electromechanical acoustical actuator and the screen,
- wherein the open baffle is configured for preventing displaced air behind the electromechanical acoustical actuator from affecting the screen.
A system comprising:
- a screen for displaying an image;
- a laser projector to project the image toward the screen;
- at least two vibrator assemblies positioned to vibrate the screen:
- and
- a controller to control the at least two vibrator assemblies using uncorrelated control signals.
Dependencies are inferred from the claim text.