Projection apparatus that performs rotation correction

Patent metadata

Field	Value
Publication number	US-12219296-B2
Application number	US-202117244602-A
Country	US
Kind code	B2
Filing date	Apr 29, 2021
Priority date	Nov 13, 2018
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

A projection apparatus capable of, when an image input from an external device and an OSD image are rotated by rotation of a projection lens, performing rotation correction suitable for the respective images is provided. A projection apparatus (1) includes a housing; a projection lens (3) that has a holder and that is rotatably attached to the housing; a first rotation position detection unit (70A) and a second rotation position detection unit (70B) that detect rotation states of the holder; a DMD (22B) that outputs, to the projection lens (3), a composite image of a projection image output from an external device and an OSD image including a character output from an internal memory; and a control unit that performs rotation correction on the OSD image and that does not perform rotation correction on the projection image based on detection results of the first rotation position detection unit (70A) and the second rotation position detection unit (70B) when the holder of the projection lens (3) rotates.

First claim

What is claimed is:

1. A projection apparatus comprising:
a housing;
a projection lens that has a holder and that is rotatably attached to the housing;
a detection unit, including a sensor, that detects a rotation state of the holder;
an image output unit including an electro-optical element that outputs a first image output from an external device to the projection lens that projects the first image in a projection direction; and
a controller that performs rotation correction on the first image based on a detection result of the detection unit without input by a user, wherein:
when the holder is rotated by 90°, the first image is rotated by 90° around the projection direction and becomes a first vertically displayed image having a long side in a top-bottom direction;
when the holder is rotated by 270°, the first image is rotated by 270° around the projection direction and becomes a second vertically displayed image having the long side in the top-bottom direction; and
the controller automatically arranges an orientation of the first vertically displayed image and an orientation of the second vertically displayed image to be identical to each other by performing the rotation correction on the first image by 180° when the detection unit detects that the holder has been rotated by 90°, and not performing the rotation correction on the first image when the detection unit detects that the holder has been rotated by 270°.

2. The projection apparatus according to claim 1 , wherein:
the image output unit outputs, to the projection lens, a composite image of the first image output from the external device and a second image including a character output from an internal memory; and
the controller performs rotation correction on the second image based on the detection result of the detection unit such that the character of the second image is erected.

3. The projection apparatus according to claim 2 ,
wherein the image output unit including the electro-optical element emits the composite image to the projection lens, and
wherein the controller performs rotation correction on the first image and the second image based on the detection result of the detection unit and outputs the first image and the second image to the electro-optical element.

4. The projection apparatus according to claim 1 ,
wherein the image output unit including the electro-optical element emits the first image to the projection lens, and
wherein the controller performs the rotation correction on the first image in association with the rotation state of the holder detected by the detection unit and outputs the first image to the electro-optical element.

5. The projection apparatus according to claim 4 , further comprising:
a housing posture detection unit, including a housing posture detection sensor, that detects a posture of the housing,
wherein the controller automatically arranges the orientation of the first vertically displayed image and the orientation of the second vertically displayed image to be identical to each other in accordance with one of the posture of the housing detected by the housing posture detection unit and the rotation state of the holder detected by the detection unit.

6. The projection apparatus according to claim 1 , further comprising:
a housing posture detection unit, including a housing posture detection sensor, that detects a posture of the housing,
wherein the controller automatically arranges the orientation of the first vertically displayed image and the orientation of the second vertically displayed image to be identical to each other in accordance with one of the posture of the housing detected by the housing posture detection unit and the rotation state of the holder detected by the detection unit.

7. The projection apparatus according to claim 1 , wherein:
the holder includes a first rotating portion and a second rotating portion, the first rotating portion being rotatable around the projection direction, the second rotating portion being rotatable around a direction intersecting with the projection direction;
the detection unit detects a rotation state of the second rotating portion; and
the controller automatically arranges the orientation of the first vertically displayed image and the orientation of the second vertically displayed image to be identical to each other in accordance with the rotation state of the second rotating portion detected by the detection unit.

Assignees

• Fujifilm Corp

Inventors

• Shimizu Hitoshi
• Omata Takeharu
• Masui Kensuke
• Kasahara Shoki

Classifications

• G03B21/28

  Reflectors in projection beam {(in illumination beam G03B21/2066)} · CPC title

• G03B21/147

  Optical correction of image distortions, e.g. keystone · CPC title

• G03B21/145 Primary

  Housing details, e.g. position adjustments thereof · CPC title

• G03B21/142

  Adjusting of projection optics · CPC title

• G03B21/30

  adapted to collapse or fold, e.g. for portability · CPC title