Method and system for providing auto focus and optical image stabilization in a compact folded camera

Patent metadata

Field	Value
Publication number	US-9927600-B2
Application number	US-201615303863-A
Country	US
Kind code	B2
Filing date	Apr 15, 2016
Priority date	Apr 16, 2015
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

Compact folded camera modules having auto-focus (AF) and optical image stabilization (OIS) capabilities and multi-aperture cameras including such modules. In an embodiment, a folded camera module includes an optical path folding element (OPFE) for folding light from a first optical path with a first optical axis to a second optical path with a second optical axis perpendicular to the first optical axis, an image sensor and a lens module carrying a lens with a symmetry axis parallel to the second optical axis. The lens module can be actuated to move in first and second orthogonal directions in a plane perpendicular to the first optical axis, the movement in the first direction being for auto-focus and the movement in the second direction being for OIS. The OPFE can be actuated to tilt for OIS.

First claim

What is claimed is:

1. A folded camera module, comprising:
a) an optical path folding element (OPFE) for folding light from a first optical path to a second optical path, the second optical path being along a second optical axis;
b) an image sensor;
c) a lens module carrying a lens assembly with a symmetry axis along the second optical axis, wherein the lens module is designed to move in a first direction parallel to the second optical axis and in a second direction orthogonal to the first direction, the first and second directions being in a first plane containing the second optical axis, wherein the first plane is perpendicular to a second plane containing the first and second optical paths, and wherein the OPFE is designed to be tilted around the second direction so as to tilt the first optical path; and
d) a lens actuation sub-assembly configured to cause the lens module movement in the first and second directions, wherein the lens actuation sub-assembly includes four coil-magnet pairs for actuating the lens module movement in the first and second directions and wherein at least one of the four coil-magnet pairs is positioned between the lens module and the image sensor.

2. The folded camera module of claim 1 , wherein the lens module movement in the first direction is for auto-focus (AF) and wherein the lens module movement in the second direction is for optical image stabilization (OIS), compensating for tilt of the camera module around the first direction.

3. The folded camera module of claim 1 , wherein the OPFE tilt is for optical image stabilization (OIS), compensating for tilt of the camera module around the second direction.

4. The folded camera module of claim 1 , further comprising an OPFE actuation sub-assembly configured to cause the OPFE to tilt.

5. The folded camera module of claim 1 , wherein each of the lens actuation sub-assembly and the OPFE actuation sub-assembly includes a plurality of flexible hanging members.

6. The camera module of claim 5 , wherein the flexible hanging members of the lens actuation sub-assembly are parallel to each other.

7. The folded camera module of claim 5 , wherein the flexible hanging members of the OPFE actuation sub-assembly are tilted.

8. The folded camera module of claim 2 , further comprising an actuation controller configured to receive data input indicative of tilt in at least one direction and data input from position sensors coupled to the lens actuation sub-assembly, and, responsive to the data input, configured to generate instructions to the lens actuation sub-assembly to cause the lens module movement in the second direction for OIS.

9. The folded camera module of claim 8 , wherein the actuation controller is further configured to receive data input indicative of tilt in at least one direction and data input from position sensors coupled to the OPFE actuation sub-assembly, and, responsive to the data input, configured to generate instructions to the OPFE actuation sub-assembly to cause the tilt of the OPFE.

10. The folded camera module of claim 8 , wherein the actuation controller is further configured to receive data input indicative of focus, and, responsive to the data input, configured to generate instructions to the lens actuation sub-assembly to cause movement in the first direction for AF.

11. The folded camera module of claim 1 , wherein the OPFE movement to tilt is around an axis perpendicular to the first and second optical directions.

12. The folded camera module of claim 1 , wherein the lens module movement in the first direction is parallel to the second optical axis and wherein the lens module movement in the second direction is perpendicular to the second optical axis.

13. A dual-aperture camera, comprising:
a) a folded camera module comprising an optical path folding element (OPFE) for folding light from a first optical path to a second optical path, the second optical path being along a second optical axis, an image sensor and a folded camera lens module carrying a lens assembly with a symmetry axis along the second optical axis, wherein the folded camera lens module is designed to move in a first direction parallel to the second optical axis and in a second direction orthogonal to the first direction, the first and second directions being in a first plane containing the second optical axis, wherein the first plane is perpendicular to a second plane containing the first and second optical paths, and wherein the OPFE is designed to be tilted around the second direction; and
b) a non-folded camera module comprising a non-folded camera image sensor and a non-folded camera lens module with a lens axis along a first optical axis perpendicular to the second optical axis.

14. The dual-aperture camera of claim 13 , wherein the folded camera lens module movement in the first direction is for auto-focus (AF) and wherein the folded camera lens module movement in the second direction is for optical image stabilization (OIS), compensating for tilt of the folded camera module around the first direction.

15. The dual-aperture camera of claim 13 , wherein the OPFE tilt is for optical image stabilization (OIS), compensating for tilt of the folded camera module around the second direction.

16. The dual-aperture camera of claim 13 , further comprising: a lens actuation sub-assembly configured to cause the folded camera lens module movement in the first and second directions, and an OPFE actuation sub-assembly configured to cause the tilt of the OPFE.

17. The dual-aperture camera of claim 16 , wherein each of the lens actuation sub-assembly and the OPFE actuation sub-assembly includes a plurality of flexible hanging members.

18. The dual-aperture of claim 17 , wherein the flexible hanging members of the lens actuation sub-assembly are parallel to each other.

19. The dual-aperture of claim 17 , wherein the flexible hanging members of the OPFE actuation sub-assembly are tilted.

20. The dual-aperture of claim 14 , further comprising an actuation controller configured to receive data input indicative of tilt in at least one direction and data input from position sensors coupled to the lens actuation sub-assembly, and, responsive to the data inputs, configured to generate instructions to the lens actuation sub-assembly to cause movement in the second direction for OIS.

21. The dual-aperture of claim 20 , wherein the actuation controller is further configured to receive data input indicative of tilt in at least one direction and data input from position sensors coupled to the OPFE actuation sub-assembly, and, responsive to the data input, configured to generate instructions to the OPFE actuation sub-assembly to cause movement of the OPFE for OIS.

22. The dual-aperture of claim 20 , wherein the actuation controller is further configured to receive data input indicative of focus, and, responsive to the data input, configured to generate instructions to the lens actuation sub-assembly to cause movement in the first direction for AF.

Assignees

• Corephotonics Ltd
• Corephotonics Ltd

Inventors

• Goldenberg Ephraim
• Shabtay Gal
• Avivi Gal
• Dror Michael
• Bachar Gil
• Yedid Itay
• Jerby Itay

Classifications

• H04N23/687

  by shifting the lens or sensor position · CPC title

• H04N23/6812

  based on additional sensors, e.g. acceleration sensors · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/45

  for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images · CPC title