Speckle reduction using screen vibration techniques and apparatus

• US 8,724,218 B2
• Filed: 07/09/2012
• Issued: 05/13/2014
• Est. Priority Date: 07/07/2011
• Status: Active Grant

• Current Assignee: RealD Incorporated
• Original Assignee: RealD Incorporated
• Inventors: Curtis, Kevin, Coleman, David A., Sharp, Gary D.
• Primary Examiner(s): Mahoney, Christopher
• Application Number:
  US13/544,962
• Publication Number:
  US 20130010356A1
• Time in Patent Office: 673 Days
• Field of Search: 359444-446
• US Class Current: 359/446
• CPC Class Codes: G02B 27/48 Laser speckle optics
• CPC Class Codes: G03B 21/56 Projection screens
• CPC Class Codes: G03B 21/562 Screens moving during projection G03B21/58 - G03B21/62 take precedence
• CPC Class Codes: G03B 31/00 Associated working of cameras or projectors with sound-recording or sound-reproducing means

Abstract

Disclosed herein are systems and related methods for reducing speckle on display screen. More specifically, screen vibration is used to reduce speckle, and in accordance with the disclosed principles, the vibration may be achieved by using wave-based actuation (e.g., acoustic or electromagnetic waves) to vibrate the screen. In an exemplary embodiment, a speckle reducing system may comprise at least one actuating element located proximate to, but not in physical contact with, a display screen. In addition, the at least one actuating element may be configured to generate waves directed towards the display screen. When the waves impact the display screen, the waves impart vibration to the display screen.

Claims

1. A speckle reducing system for reducing speckle on a display screen, the system comprising:

at least one actuating element located proximate to, but not in physical contact with, a display screen;

wherein the at least one actuating element is configured to generate waves directed towards the display screen, the waves impacting the display screen to impart vibration to the display screen, further wherein the waves generated by the at least one actuating element are generated in pulses.

2. A method of reducing speckle on a display screen, the method comprising:

positioning at least one actuating element proximate to, but not in physical contact with, a display screen;

generating waves with the at least one actuating element; and

directing the generated waves towards the display screen, the waves impacting the display screen to impart vibration to the display screen, wherein generating the waves comprises generated pulses of waves.

3. A speckle reducing system for reducing speckle on a display screen, the system comprising:

at least one actuating element located proximate to, but not in physical contact with, a display screen;

wherein the at least one actuating element is configured to generate waves directed towards the display screen, the waves impacting the display screen to impart vibration to the display screen, further wherein the at least actuating element comprises at least one electromagnetic wave generator, and the waves generated are electromagnetic waves.

4. A speckle reducing system according to claim 3, further comprising a plurality of radiating antennas located on a surface of the display screen, each of the plurality of radiating antennas configured to receive electromagnetic waves thereby imparting the vibration to the display screen.

5. A speckle reducing system according to claim 4, wherein the plurality of radiating antennas are located on a back surface of the screen, on a front surface of the screen, or a combination thereof.

6. A method of reducing speckle on a display screen, the method comprising:

positioning at least one actuating element proximate to, but not in physical contact with, a display screen;

generating waves with the at least one actuating element; and

directing the generated waves towards the display screen, the waves impacting the display screen to impart vibration to the display screen, wherein the at least actuating element comprises at least one electromagnetic wave generator, and generating waves comprises generating electromagnetic waves.

7. A method according to claim 6, further comprising positioning a plurality of radiating antennas on a surface of the display screen, each of the plurality of radiating antennas configured to receive electromagnetic waves thereby imparting the vibration to the display screen.

8. A method according to claim 7, further comprising positioning the plurality of radiating antennas on a back surface of the screen, on a front surface of the screen, or a combination thereof.