Optical system

Patent metadata

Field	Value
Publication number	US-11809013-B2
Application number	US-202016900002-A
Country	US
Kind code	B2
Filing date	Jun 12, 2020
Priority date	Jun 14, 2019
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

An optical system is provided. The optical system includes a first optical module. The first optical module includes a fixed portion, a movable portion, a driving assembly, and a circuit assembly. The movable portion is movably connected to the fixed portion, and the movable portion is used to connect to an optical element. The driving assembly is used to drive the movable portion to move relative to the fixed portion. The circuit assembly is electrically connected to the driving assembly.

First claim

What is claimed is:

1. An optical system, comprising:
a first optical module, comprising:
a fixed portion;
a movable portion movably connected to the fixed portion, wherein the movable portion is used for connecting to an optical element;
a driving assembly used for moving the movable portion relative to the fixed portion; and
a circuit assembly electrically connected to the driving assembly;
a pressing assembly for applying pressure to the driving assembly, wherein the driving assembly and the movable portion are arranged in a direction of the pressure, and the direction of the pressure is not parallel to a first direction;

wherein the pressing assembly comprises:
a pressing element that is resilient; and
an adjusting element for adjusting the value or the direction of the pressure, wherein the adjusting element comprises a thread structure.

2. The optical system as claimed in claim 1 , wherein the driving assembly is used for rotating the movable portion relative to the fixed portion, a rotational axis of the movable portion extends in the first direction, and the driving assembly comprises:
a driving source for generating a first driving force, comprising:
a first piezoelectric element;
a resilient element disposed on the first piezoelectric element; and
a transmission element for transmitting the first driving force, wherein the transmission element has an elongated shape and extends in a second direction, and the first direction and the second direction are not parallel.

3. The optical system as claimed in claim 2 , wherein the first optical module further comprises a frame, the driving assembly is disposed on the frame, and the frame comprises:
a main body;
a first leaning portion disposed on the main body and corresponding to the pressure assembly;
a second leaning portion disposed on the main body and corresponding to the pressure assembly;
a first through hole positioned on the first leaning portion, wherein at least a portion of the transmission element is accommodated in the first through hole; and
a second through hole positioned on the second leaning portion.

4. The optical system as claimed in claim 3 , wherein at least a portion of the transmission element is accommodated in the second through hole, and the first leaning portion and the second leaning portion are arranged in a direction that is parallel to the second direction.

5. The optical system as claimed in claim 4 , wherein the frame is movably connected to the fixed portion, the frame comprises a protruding structure and an accommodating structure, the protruding structure is disposed on the main body, and at least a portion of the protruding structure is accommodated in the accommodating structure.

6. The optical system as claimed in claim 5 , wherein a gap is formed between the protruding structure and the accommodating structure, and the accommodating structure, the gap, and the protruding structure are arranged in the direction of the pressure.

7. The optical system as claimed in claim 6 , wherein the first optical module further comprises:
a first bonding element, wherein the transmission element is connected to the driving source via the first bonding element;
a second bonding element, wherein the resilient element is connected to the first piezoelectric element via the second bonding element; and
a third bonding element, wherein the transmission element is connected to the frame via the third bonding element.

8. The optical system as claimed in claim 7 , wherein the Young's modulus of the first bonding element is greater than the Young's modulus of the second bonding element, and the Young's modulus of the first bonding element is greater than the Young's modulus of the third bonding element.

9. The optical system as claimed in claim 8 , wherein the Young's modulus of the second bonding element is greater than the Young's modulus of the third bonding element.

10. The optical system as claimed in claim 9 , wherein the first optical module further comprises a position sensing assembly for detecting the movement of the movable portion relative to the fixed portion, and the position sensing assembly is at least partially disposed on the circuit assembly.

11. The optical system as claimed in claim 10 , wherein the circuit assembly comprises:
a first circuit element electrically connected to the driving assembly;
a second circuit element, wherein the first circuit element and the second circuit element are arranged in the first direction.

12. The optical system as claimed in claim 11 , wherein the circuit assembly further comprises:
a control element disposed on the second circuit element, wherein the control element is used for controlling the driving assembly;
a power source disposed on the second circuit element, wherein the power source is used for providing power;
a wireless communication element disposed on the second circuit element, wherein the wireless communication element is used for emitting a signal to an external apparatus;
a passive element disposed on the second circuit element;
a first spacer disposed between the first circuit element and the second circuit element; and
an interference-suppressing element disposed between the position sensing assembly and the second circuit element, and disposed between the first circuit element and the second circuit element.

13. The optical system as claimed in claim 12 , wherein the first circuit element and the second circuit element are plate-shaped and parallel to each other, a gap is formed between the first circuit element and the second circuit element, and the first circuit element is closer to the movable portion than the second circuit element.

14. The optical system as claimed in claim 13 , wherein the fixed portion comprises:
a blocking plate disposed between the optical element and the driving assembly, wherein the movable portion comprises a rotational axis penetrating the blocking plate;
a first case surrounding the circuit assembly; and
a second case surrounding the optical element, wherein the second case comprises transparent material, the optical element is used for adjusting the direction of an optical axis of incident light from an incident direction to an exit direction, and the incident direction is not parallel to the exit direction.

15. The optical system as claimed in claim 14 , further comprising a second optical module corresponding to the first optical module, wherein the second optical module comprises:
a lens; and
a photosensitive element corresponding to the lens, wherein the lens and the photosensitive element are arranged in the exit direction, and the exit direction is parallel to the first direction.

16. The optical system as claimed in claim 15 , wherein the optical element is positioned between the second optical module and the driving assembly, and the driving assembly is positioned between the second optical module and the circuit assembly.

17. The optical system as claimed in claim 16 , wherein the second case does not overlap the second optical module when viewed in a direction that is perpendicular to the first direction.

18. The optical system as claimed in claim 17 , wherein the second optical module is electrically connected to an external circuit, the second optical module is electrically isolated from the circuit assembly, and the second optical module is electrically isolated from the power source.

Assignees

• Tdk Taiwan Corp

Inventors

• Ryoo Jungsuck
• Cheng Pai-Jui
• Hu Chao-Chang
• Tsai Min-Hsiu
• Chen Shu-Shan
• Chang Chieh-An

Classifications

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G02B7/09 Primary

  adapted for automatic focusing or varying magnification · CPC title

• G02B7/04 Primary

  with mechanism for focusing or varying magnification · 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