Projector and control method

• US 8,282,219 B2
• Filed: 01/13/2010
• Issued: 10/09/2012
• 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:
  US12/686,687
• Publication Number:
  US 20100177283A1
• Time in Patent Office: 1,000 Days
• Field of Search: 353/69, 353/70, 353/46, 353/51, 353/101
• US Class Current: 353/70
• 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 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 image sensor that captures the projected image and thus produces a captured image; a movement detection sensor that is arranged on a plane parallel to the imaging plane of the image sensor and produces movement information on the basis of the detected movement, the movement detection sensor being arranged at an angle in the direction not equal to the horizontal direction and vertical direction of the imaging plane; a determining portion that determines whether the movement information meets an adjustment condition or not; and a control portion that, when the movement information meets the adjustment condition, controls the image data producing portion so as to adjust the image data on the basis of the captured image.

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 image sensor that captures the projected image and thus produces a captured image;

a movement detection sensor that is arranged on a plane parallel to an imaging plane of the image sensor and produces movement information on the basis of the detected movement, the movement detection sensor being longitudinally arranged in a longitudinal direction that is different than a horizontal direction and a vertical direction of the imaging plane, the sensor being configured to determine angular velocity in a direction of rotation about the longitudinal direction of the movement detection sensor so as to determine movement in the horizontal direction and the vertical direction of the imaging plane;

a determining portion that determines whether the movement information meets an adjustment condition or not; and

a control portion that, when the movement information meets the adjustment condition, controls the image data producing portion so as to adjust the image data on the basis of the captured image.

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 on the basis of the captured image when the movement stops after the movement information meets the adjustment condition.

3. The projector according to claim 1, wherein:

the movement detection 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 movement detection sensor is a gyroscope.

5. The projector according to claim 1, wherein:

when the movement information meets the adjustment condition, the control portion controls the image data producing portion so as to produce a calibration image data to be output to the projection portion, and controls the image sensor so as to capture the calibration image projected by the projecting portion and produce the captured image.

6. The projector according to claim 1, wherein:

when the movement information meets the adjustment condition, the control portion controls the projecting portion so as to perform focus adjustment on the projected image on the basis of the captured 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;

an image sensor that captures the projected image and thus produces a captured image; and

a movement detection sensor that is arranged on a plane parallel to an imaging plane of the image sensor and produces movement information on the basis of the detected movement, the movement detection sensor being longitudinally arranged in a longitudinal direction that is different than a horizontal direction and a vertical direction of the imaging plane, the sensor being configured to determine angular velocity in a direction of rotation about the longitudinal direction of the movement detection sensor so as to determine movement in the horizontal direction and the vertical direction of the imaging plane, the control method comprising;

producing movement information on the projector;

determining whether the movement information meets an adjustment condition or not; and

when the movement information meets the adjustment condition, controlling the image data producing portion so as to adjust the image data on the basis of the captured image acquired by capturing a projected image.

8. 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 image capturing device that captures the projected image;

a one-axis gyroscope that is arranged on a plane parallel to an imaging plane of the image capturing device and produces movement information on the basis of the detected movement, the gyroscope having a longitudinal portion and being arranged in the longitudinal direction that is different than a horizontal direction and a vertical direction of the imaging plane;

a determining portion that determines whether the movement information meets an adjustment condition or not; and

a control portion that, if the movement information meets the adjustment condition, controls the image data producing portion so as to adjust the image data on the basis of the captured image.