Camera module having reflective element and electronic device

Patent metadata

Field	Value
Publication number	US-11703658-B2
Application number	US-202017076663-A
Country	US
Kind code	B2
Filing date	Oct 21, 2020
Priority date	Sep 16, 2020
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A camera module includes a base, a lens module, a reflection module, a longitudinal guiding bar, a transverse guiding bar and a shaft guiding bar. The lens module has an optical axis and is disposed on the base. The reflection module includes a reflective element disposed on the base and located on an object side of the lens module. The longitudinal and transverse guiding bars are disposed between the base and the lens module and respectively extend in a first direction parallel to the optical axis and a second direction perpendicular to the optical axis. The shaft guiding bar is disposed between the base and the reflection module and extends in the second direction. The lens module is movable along the longitudinal and transverse guiding bars, respectively, and the reflective element is rotatable by taking the shaft guiding bar as a rotation axis.

First claim

What is claimed is:

1. A camera module, comprising:
a base;
a lens module, having an optical axis, and the lens module being disposed on the base;
a reflection module, comprising a reflective element, the reflective element being disposed on the base, and the reflective element located on an object side of the lens module;
a longitudinal guiding bar, disposed between the base and the lens module, and the longitudinal guiding bar extending in a first direction parallel to the optical axis;
a transverse guiding bar, disposed between the base and the lens module, and the transverse guiding bar extending in a second direction perpendicular to the optical axis; and
a shaft guiding bar, disposed between the base and the reflection module, and the shaft guiding bar extending in the second direction;
wherein the lens module is movable along the longitudinal guiding bar and the transverse guiding bar, respectively, and the reflective element is rotatable by taking the shaft guiding bar as a rotation axis;
wherein the camera module further comprises a movable frame disposed between the longitudinal guiding bar and the transverse guiding bar, and the movable frame is movable along one of the longitudinal guiding bar and the transverse guiding bar.

2. The camera module of claim 1 , further comprising at least one cushion element, wherein the cushion element comprises a fixed part, a contact part and an elastic part, the fixed part is fixed to one of the base and the lens module, the contact part corresponds to other of the base and the lens module, and the elastic part is connected to the fixed part and the contact part.

3. The camera module of claim 1 , further comprising at least one cushion element, wherein the cushion element comprises a fixed part, a contact part and an elastic part, the fixed part is fixed to one of the movable frame and the lens module, the contact part corresponds to other of the movable frame and the lens module, and the elastic part is connected to the fixed part and the contact part.

4. The camera module of claim 1 , further comprising a first driving mechanism, wherein the first driving mechanism comprises a first driving magnet and a first driving coil, the first driving magnet is disposed on the lens module, the first driving coil corresponds to the first driving magnet, and the first driving mechanism is configured to drive the lens module to move along the first direction.

5. The camera module of claim 4 , further comprising a second driving mechanism, wherein the second driving mechanism comprises a second driving magnet and a second driving coil, the second driving magnet is disposed on the lens module, the second driving coil corresponds to the second driving magnet, and the second driving mechanism is configured to drive the lens module to move along the second direction.

6. The camera module of claim 5 , further comprising a ferromagnetic element, wherein the ferromagnetic element is disposed on the base, the ferromagnetic element corresponds to one of the first driving magnet and the second driving magnet so as to together provide a force of attraction to the lens module in a direction towards the base, such that the longitudinal guiding bar and the transverse guiding bar support the lens module.

7. The camera module of claim 5 , wherein one of the longitudinal guiding bar and the transverse guiding bar is made of ferromagnetic material, is fixed to the base and corresponds to one of the first driving magnet and the second driving magnet so as to together provide a force of attraction to the lens module in a direction towards the base, such that the longitudinal guiding bar and the transverse guiding bar support the lens module.

8. The camera module of claim 1 , further comprising a rotation driving mechanism, wherein the rotation driving mechanism comprises a rotation driving magnet and a rotation driving coil, the rotation driving magnet is disposed on the reflection module, the rotation driving coil corresponds to the rotation driving magnet, and the rotation driving mechanism is configured to drive the reflection module to rotate by taking the shaft guiding bar as a rotation axis.

9. The camera module of claim 1 , further comprising a preload element, wherein the preload element is connected to the base and the reflection module, and the preload element is configured to provide a preload force to the reflection module in a direction towards the base, such that the shaft guiding bar located between the base and the reflection module supports the reflection module.

10. The camera module of claim 9 , further comprising a damping element, wherein the damping element is disposed between the preload element and the base.

11. The camera module of claim 1 , wherein the longitudinal guiding bar and the transverse guiding bar are both cylindrical.

12. The camera module of claim 1 , wherein the shaft guiding bar is cylindrical.

13. The camera module of claim 1 , wherein a maximum field of view of the lens module is FOV, and the following condition is satisfied:
3 degrees<FOV<40 degrees.

14. The camera module of claim 1 , wherein a length of the longitudinal guiding bar is L1, a length of the transverse guiding bar is L2, and the following condition is satisfied:
0.1<L2/L1<2.0.

15. An electronic device, comprising:
the camera module of claim 1 .

16. A camera module, comprising:
a base;
a lens module, having an optical axis, and the lens module being disposed on the base;
a reflection module, comprising a reflective element, the reflective element being disposed on the base, and the reflective element located on an object side of the lens module;
a longitudinal guiding bar, disposed between the base and the lens module, and the longitudinal guiding bar extending in a first direction parallel to the optical axis; and
a shaft guiding bar, disposed between the base and the reflection module, and the shaft guiding bar extending in a second direction perpendicular to the optical axis;
wherein the lens module is movable along the longitudinal guiding bar, and the reflective element is rotatable by taking the shaft guiding bar as a rotation axis;
wherein the camera module further comprises a preload element connected to the base and the reflection module, the preload element is configured to provide a preload force to the reflection module in a direction towards the base, such that the shaft guiding bar located between the base and the reflection module supports the reflection module;
wherein the camera module further comprises a damping element disposed between the preload element and the base, and the damping element is directly in contact with the preload element and the base.

17. A camera module, comprising:
a base;
a lens module, having an optical axis, and the lens module being disposed on the base;
a reflection module, comprising a reflective element, the reflective element being disposed on the base, and the reflective element located on an object side of the lens module;
a transverse guiding bar, disposed between the base and the lens module, and the transverse guiding bar extending in a direction perpendicular to the optical axis; and
a shaft guiding bar, disposed between the base and the reflection module, and the shaft guiding bar extending in the direction perpendicular to the optical axis;
wherein the lens module is movable along the transverse guiding bar, and the reflective element is rotatable by taking the shaft guiding bar as a rotation axis;
wherein the camera module further comprises a preload element connected to the ba

Assignees

• Largan Digital Co Ltd

Inventors

• Chang Lin An
• Chou Ming-Ta
• Hsu Wen-Hung
• Tseng Te-Sheng

Classifications

• G02B7/09 Primary

  adapted for automatic focusing or varying magnification · CPC title

• G02B13/0065

  having a beam-folding prism or mirror · CPC title

• G02B27/646

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• G03B5/00

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title

• G03B13/36

  Autofocus systems · CPC title