Stabilized image projecting device

• US 20060146015A1
• Filed: 01/05/2005
• Published: 07/06/2006
• Est. Priority Date: 01/05/2005
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Buchmann, Michael
• Granted Patent: US 7,284,866 B2
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: G02B 26/0816 by means of one or more reflecting elements
• CPC Class Codes: G02B 26/0875 by means of one or more refracting elements
• CPC Class Codes: G02B 26/0883 the refracting element being a prism
• CPC Class Codes: G02B 27/20 for imaging minute objects, e.g. light-pointer
• 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
• CPC Class Codes: H04N 9/3194 including sensor feedback

Abstract

A handheld projecting device is adapted to project an image and a pointer pattern on an external surface. The projecting device comprises a sensor to detect the movements of the projecting device and means to dampen the movements of the projected image, based on the detected movements of the projecting device. When the handheld projecting device is turned, the position of the projected image is kept substantially stationary whereas the pointer pattern moves on the projected image to indicate a point of the projected image. In an embodiment, the pointer pattern may be used to make a selection between graphically displayed options.

Claims

1. A mobile device adapted to optically project at least a first image and a pointer pattern on an external surface, said mobile device comprising at least:

a sensor to provide movement information related to angular movement of said mobile device with respect to an external reference, and

a control unit to move the position of said first image with respect to said pointer pattern according to said movement information such that the relative movement of said first image with respect to said external reference is substantially smaller than the relative movement of said pointer pattern with respect to said external reference.

2. The mobile device according to claim 1, wherein said sensor is further adapted to provide absolute position information of said mobile device.

3. The mobile device according to claim 1, wherein said mobile device further comprises:

means to associate a position of said pointer pattern with an action option, which position is determined with respect to said first image,

means to receive a command given by a user, and

means to accept or reject said action option according to said user command.

4. The mobile device according to claim 1, wherein an angular position of said pointer pattern is substantially fixed with respect to the exterior said mobile device.

5. The mobile device according to claim 1, wherein said control unit is adapted to keep the position of said first image substantially fixed with respect to said external reference.

6. The mobile device according to claim 1, wherein said pointer pattern is adapted to be projected by an emissive pointer unit.

7. The mobile device according to claim 1, wherein said pointer pattern is adapted to be projected as an image.

8. The mobile device according to claim 1, wherein said position of said first image is adapted to be adjusted by electronically moving a position of a primary image displayed on a micro display.

9. The mobile device according to claim 1, wherein said mobile device further comprises means to mechanically adjust the position of said first image.

10. The mobile device according to claim 9, wherein said means to mechanically adjust the position of said first image are adapted to mechanically move the projecting optics of the mobile device.

11. The mobile device according to claim 1, wherein said mobile device further comprises wireless communication capabilities.

12. A method to project an image on an external surface, said method comprising at least:

optically projecting at least a first image and a pointer pattern on said external surface using a handheld projecting device,

providing movement information related to the angular movement of said projecting device with respect to an external reference, and

adjusting the position of said first image with respect to said pointer pattern according to said movement information such that the relative movement of said first image with respect to said external reference is substantially smaller than the relative movement of said pointer pattern with respect to said external reference.

13. The method according to claim 12 further comprising providing information related to absolute position information of said handheld projecting device.

14. The method according to claim 12 further comprising

moving said pointer pattern to a position, which position is determined with respect to said first image,

associating said position with an action option,

receiving a command given by a user, and

accepting or rejecting said action option according to said user command.

15. The method according to claim 12 wherein an angular position of said pointer pattern is kept substantially fixed with respect to the exterior of said projecting device.

16. The method according to claim 12 wherein the position of said first image is kept substantially fixed with respect to said external reference.

17. The method according to claim 12 wherein said pointer pattern is projected by an emissive pointer unit.

18. The method according to claim 12, wherein said pointer pattern is projected using a combination of projecting optics and a micro display.

19. The method according to claim 12 wherein the position of said first image is adjusted by electronically moving a position of a primary image displayed on a micro display.

20. The method according to claim 12 wherein the position of said first image is adjusted by mechanical means.

21. The method according to claim 20, wherein the position of said first image is adjusted by mechanically moving the projecting optics of the device.

22. The method according to claim 12 wherein said projecting device communicates with external apparatus.

23. A system comprising at least

a handheld projecting device, and

further apparatus adapted to communicate with said projecting device, said handheld projecting device being adapted to optically project at least a first image and a pointer pattern on an external surface, said projecting device comprising at least:

a sensor to provide movement information related to the angular movement of said projecting device with respect to an external reference, and

a control unit to move the position of said first image with respect to said pointer pattern according to said movement information such that the relative movement of said first image with respect to said external reference is substantially smaller than the relative movement of said pointer pattern with respect to said external reference.

24. A computer program product for a projecting device adapted to project a first image and a pointer pattern on an external surface, said computer program product comprising at least computer program code sections stored on a readable medium, which when executed by a processor are for

controlling the projection of at least said first image on said external surface,

providing movement information related to the angular movement of said projecting device with respect to an external reference, and

adjusting the position of said first image with respect to said pointer pattern according to said movement information such that the relative movement of said first image with respect to said external reference is substantially smaller than the relative movement of said pointer pattern with respect to said external reference.