Projector and control method

• US 8,534,845 B2
• Filed: 09/04/2012
• Issued: 09/17/2013
• Est. Priority Date: 01/13/2009
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Tanaka, Hiroyuki
• Primary Examiner(s): Dowling, William C
• Application Number:
  US13/603,122
• Publication Number:
  US 20120327314A1
• Time in Patent Office: 378 Days
• Field of Search: 353/69, 353/70, 353/46, 353/51, 353/101
• US Class Current: 353/69
• CPC Class Codes: G03B 21/147 Optical correction of image distortions, e.g. keystone
• CPC Class Codes: G09G 2340/04 Changes in size, position or resolution of an image
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP

Abstract

A projector includes a projecting portion, an image data producing portion, an angular velocity sensor, and a control portion. The projecting portion projects an image based on input image data. The image data producing portion produces the image data and then outputs the image data to the projecting portion. The angular velocity sensor detects angular velocity and is longitudinally arranged in a longitudinal direction that is different than a horizontal direction and a vertical direction of the front panel and configured to determine angular velocity in a direction of rotation about the longitudinal direction of the angular velocity sensor to determine movement of the projector in at least one of in the horizontal direction and the vertical direction. If the angular velocity is detected by the angular velocity sensor, the control portion controls the image data producing portion so as to adjust the image data.

Claims

1. A projector comprising:

a projecting portion that projects an image based on input image data;

an image data producing portion that produces the image data and then outputs the image data to the projecting portion;

an angular velocity sensor that is arranged near a front panel of the projector and detects angular velocity, the angular velocity sensor being longitudinally arranged in a longitudinal direction that is different than a horizontal direction and a vertical direction of the front panel, the angular velocity sensor being configured to determine angular velocity in a direction of rotation about the longitudinal direction of the angular velocity sensor so as to determine movement of the projector in at least one of in the horizontal direction and the vertical direction; and

a control portion that, if the angular velocity is detected by the angular velocity sensor, controls the image data producing portion so as to adjust the image data.

2. The projector according to claim 1, wherein:

the control portion controls the image data producing portion so as to adjust the image data in order to correct a distortion of the image when the movement stops after the angular velocity is detected by the angular velocity sensor.

3. The projector according to claim 1, wherein:

the angular velocity sensor detects a change or changes in pitch angle and/or yaw angle of the imaging plane of the image sensor.

4. The projector according to claim 3, wherein:

the angular velocity sensor is a gyroscope.

5. The projector according to claim 1, wherein:

when the angular velocity is detected by the angular velocity sensor, the control portion controls the image data producing portion so as to produce a calibration image data to be output to the projection portion.

6. The projector according to claim 1, wherein:

when the angular velocity is detected by the angular velocity sensor, the control portion controls the projecting portion so as to perform focus adjustment on the projected image.

7. A control method for a projector,

the projector having:

a projecting portion that projects an image based on input image data;

an image data producing portion that produces the image data and then outputs the image data to the projecting portion; and

an angular velocity sensor that is arranged near a front panel of the projector and detects angular velocity, the angular velocity sensor being longitudinally arranged in a longitudinal direction that is different than a horizontal direction and a vertical direction of the front panel, the angular velocity sensor being configured to determine angular velocity in a direction of rotation about the longitudinal direction of the angular velocity sensor so as to determine movement of the projector in at least one of in the horizontal direction and the vertical direction,

the control method comprising;

detecting angular velocity by the angular velocity sensor; and

if the angular velocity is detected by the angular velocity sensor, controlling the image data producing portion so as to adjust the image data.