Method and system for displaying a stabilized image by a projector

• US 20060256298A1
• Filed: 05/12/2005
• Published: 11/16/2006
• Est. Priority Date: 05/12/2005
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Knipe, Richard L.
• Application Number:
  US11/129,263
• Publication Number:
  US 20060256298A1
• Time in Patent Office: Days
• US Class Current: 353/69
• CPC Class Codes: G03B 21/14 Details
• CPC Class Codes: G03B 2205/0007 Movement of one or more optical elements for control of motion blur
• CPC Class Codes: G03B 5/06 Swinging lens about normal to the optical axis
• CPC Class Codes: H04N 9/3185 Geometric adjustment, e.g. keystone or convergence optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

According to one embodiment of the invention, a method for displaying an image includes sensing an acceleration of a projector in at least one direction and, based on the sensed acceleration, determining a motion of the projector in at least one direction. The method also includes adjusting an image associated with the projector based on the determined relative motion.

Claims

1. A method for displaying an image comprising:

sensing, by at least two accelerometers, acceleration of the projector in at least two directions;

based on the sensed accelerations determining the velocity of the projector in first and second directions; and

adjusting an image associated with the projector in directions generally opposite to the first and second directions at velocities generally opposite to the determined velocities in the first and second directions such that the shifted image appears stationary when displayed.

2. A method of claim 1, wherein the at least two directions comprise the first and second directions and the first direction is generally perpendicular to the second direction.

3. A method for displaying an image comprising:

sensing an acceleration of a projector in at least one direction and, based on the sensed acceleration, determining a motion of the projector in at least one direction; and

adjusting an image associated with the projector based on the determined relative motion.

4. The method of claim 3, and further comprising storing data corresponding to respective pixels;

and

wherein adjusting an image comprises shifting at least some of the data corresponding to particular ones of the plurality of pixels to particular other ones of the pixels in a direction corresponding to a direction generally opposite of the determined motion such that a resulting image displayed by the projector appears stationary.

5. The method of claim 3, wherein adjusting an image comprises shifting the image in a direction corresponding to a direction generally opposite the determined motion of the projector such that an image displayed by the projector appears stationary.

6. The method of claim 5, wherein shifting an image comprises shifting by one of a reflective optical device and a transmissive optical device.

7. The method of claim 5, wherein shifting an image comprises shifting stored data representative of the image.

8. The method of claim 3, wherein sensing an acceleration of the projector in at least one direction comprises sensing an acceleration by at least one accelerometer.

9. The method of claim 3, wherein sensing an acceleration of the projector in at least one direction comprises sensing the acceleration of the projector in first and second directions, the first direction approximately perpendicular to the second direction.

10. The method of claim 3, wherein determining a motion comprises integrating with respect to time a signal indicative of the sensed acceleration.

11. The method of claim 3, wherein the projector comprises a digital micro-mirror device.

12. The method of claim 3, wherein the projector comprises a plurality of panels of a type selected from the group consisting of LCD and LCOS.

13. The method of claim 3, wherein the projector is a front projection projector.

14. A projector comprising:

a spatial light modulator operable to modulate received light;

a light source operable to generate light to be modulated by the spatial light modulator;

a lens operable to focus light received from the spatial light modulator and project focused light on a display;

at least one accelerometer operable to measure an acceleration of the projector; and

an image adjustment system operable to determine a motion of the projector in at least one direction and effect adjustment of an image associated with the projector in a direction corresponding to a direction generally opposite the determined motion in the at least one direction such that the adjusted image appears stationary when displayed.

15. The projector of claim 14, wherein the adjustment system comprises an integrator operable to integrate a signal indicative of the measured acceleration and determine the motion of the projector therefrom.

16. The projector of claim 14, wherein the adjustment system comprises one of a reflective optical device and a transmissive optical device.

17. The projector of claim 14, wherein the image adjustment system comprises logic encoded in media.

18. The projector of claim 14, wherein the image adjustment system is operable to effect adjustment of the image by shifting data representative of the image.

19. The projector of claim 14, wherein the image adjustment system is operable to effect adjustment of the image by shifting at least some data corresponding to particular ones of a plurality of pixels to particular other ones of the plurality of pixels in a direction corresponding to a direction generally opposite of the determined motion such that an image displayed by the projector appears generally stationary.

20. The projector of claim 14, wherein the spatial light modulator is selected from the group consisting of a DMD light modulator, an LCD light modulator, and an LCOS light modulator.