Image projection apparatus

Patent metadata

Field	Value
Publication number	US-10466574-B2
Application number	US-201816037316-A
Country	US
Kind code	B2
Filing date	Jul 17, 2018
Priority date	Jul 21, 2017
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

An image projection apparatus includes an acquirer configured to acquire information on a lens unit, and a controller configured to set, based on the information on the lens unit, at least one of an image orientation of a projection image and a shift direction of the lens unit.

First claim

What is claimed is:

1. An image projection apparatus in which a projection lens is interchangeable, the image projection apparatus comprising:
an acquirer configured to acquire information on the projection lens; and
a controller configured to set, based on the information on the projection lens, at least one of an image direction of a vertical or lateral direction of a projection image and a shift direction of the projection image with respect to a shift direction of the projection lens,
wherein as the projection lens, a first projection lens and a second projection lens that has a different optical characteristic from that of the first projection lens are attachable to the image projection apparatus, and
wherein in a case where the second projection lens is attached to the image projection apparatus, the controller is configured to reverse at least one of the image direction of the projection image and the shift direction of the projection image with respect to a case where the first projection lens is attached to the image projection apparatus.

2. The image projection apparatus according to claim 1 , wherein the information on the projection lens is information on the image direction stored in a memory in the projection lens, and
wherein the acquirer acquires the information on the projection lens from the memory, and the controller sets the image direction based on the information on the projection lens.

3. The image projection apparatus according to claim 1 , further comprising a memory configured to store the information on the image direction for each type of the projection lens,
wherein the information on the projection lens is identification information of the projection lens,
wherein the acquirer acquires the identification information from the projection lens, and
wherein the controller selects information corresponding to the identification information based on the information on the image direction stored in the memory and sets the image direction.

4. The image projection apparatus according to claim 1 , wherein the information on the projection lens is information on the image direction,
wherein the acquirer includes a communicator configured to communicate with an external unit and acquires the information on the projection lens by communicating with the external unit, and
wherein the controller sets the image direction based on the information on the projection lens.

5. The image projection apparatus according to claim 1 , wherein the controller sets the image direction of the projection image based on the information of the projection lens, and
wherein the image projection apparatus further comprises an image processor configured to reverse or rotate the image direction of at least part of the projection image based on the image direction set by the controller.

6. The image projection apparatus according to claim 1 , wherein the acquirer detects a change of the information on the projection lens, and
wherein the controller sets the image direction when the acquirer detects the change of the information on the projection lens.

7. The image projection apparatus according to claim 1 , further comprising:
a display unit; and
an operation unit configured to input an operation of a user,
wherein the controller instructs the display unit to prompt the user to change a setting of the image direction, and
wherein the controller sets the image direction based on a changed setting when the user changes the setting via the operation unit.

8. The image projection apparatus according to claim 1 , further comprising a state detector configured to detect an installation state of the image projection unit apparatus,
wherein the controller sets the image direction based on a changed installation state when the installation state is changed.

9. The image projection apparatus according to claim 1 , further comprising a movable mirror,
wherein the controller sets the image direction of the projection image based on a state of the movable mirror.

10. The image projection apparatus according to claim 1 , wherein the information on the projected lens is information on the shift direction stored in a memory in the projection lens, and
wherein the acquirer acquires the information on the projection lens from the memory, and the controller sets the shift direction based on the information on the projection lens.

11. The image projection apparatus according to claim 1 , further comprising a memory configured to store the information on the shift direction for each type of the projection lens,
wherein the information on the projection lens is identification information of the projection lens,
wherein the acquirer acquires the identification information from the projection lens, and
wherein the controller selects information corresponding to the identification information based on the information on the shift direction stored in the memory and sets the shift direction.

12. The image projection apparatus according to claim 1 , wherein the information on the projection lens is information on the shift direction,
wherein the acquirer includes a communicator configured to communicate with an external unit and acquires the information on the projection lens by communicating with the external unit, and
wherein the controller sets the shift direction based on the information on the projection lens.

13. The image projection apparatus according to claim 1 , wherein the acquirer detects a change of the information on the projection lens, and
wherein the controller sets the shift direction when the acquirer detects the change of the information on the projection lens.

14. The image projection apparatus according to claim 1 , further comprising:
a display unit; and
an operation unit configured to input an operation of a user,
wherein the controller instructs the display unit to prompt the user to change a setting of the shift direction, and
wherein the controller sets the shift direction based on a changed setting when the user changes the setting via the operation unit.

15. The image projection apparatus according to claim 1 , further comprising a state detector configured to detect an installation state of the image projection apparatus,
wherein the controller sets the shift direction based on a changed installation state when the installation state is changed.

16. The image projection apparatus according to claim 1 , further comprising a movable mirror,
wherein the controller sets the shift direction of the projection image based on a state of the movable mirror.

17. The image projection apparatus according to claim 1 , further comprising a shifter configured to shift the projection lens relative to an optical axis based on the shift direction set by the controller.

Assignees

• Canon Kk

Inventors

• Kobayashi Keisuke

Classifications

• G03B21/28

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

• H04N9/3185

  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) · CPC title

• H04N9/3141 Primary

  Constructional details thereof (details not peculiar to the presence of an electronic spatial light modulator G03B21/14) · CPC title

• G02B27/0955

  Lenses (lenses per se G02B3/00) · CPC title

• H04N9/31

  Projection devices for colour picture display {, e.g. using electronic spatial light modulators [ESLM]} · CPC title