Lens driving device with 3D elastic support structure
View Patent ↗A lens driving device includes a lens holder for holding a lens having an optical axis; a focusing coil disposed at a periphery of the lens with respect to the optical axis; an optical image stabilizer (OIS) coil structure including a plurality of coils; a circuit structure connected electrically to the OIS coil structure and taking control thereof; a plurality of magnets; and an elastic support structure, having an upper plate spring portion and a plurality of suspension wires, wherein each suspension wire is disposed substantially parallel with the optical axis and integrally formed with the upper plate spring portion at one end and connected electrically to the circuit structure at the other end.
1. A lens driving device, comprising:
a lens holder for holding a lens having an optical axis;
a focusing coil disposed at a periphery of the lens with respect to the optical axis;
an optical image stabilizer (OIS) coil structure comprising a plurality of coils;
a circuit structure connected electrically to the OIS coil structure and taking control thereof;
a plurality of magnets; and
an elastic support structure, having an upper plate spring portion and a plurality of suspension wires, wherein each suspension wire is disposed substantially parallel with the optical axis and integrally formed with the upper plate spring portion at one end and connected electrically to the circuit structure at the other end,
wherein the upper plate spring portion includes at least a first upper plate spring and at least a second upper plate spring, and the plurality of suspension wires includes two first suspension wires and two second suspension wires,
wherein the first upper plate spring comprises an inner portion and an outer portion connected electrically thereto,
wherein the second upper plate spring comprises an inner portion and an outer portion connected electrically thereto,
wherein each first suspension wire is integrally formed with the outer portion of the first upper plate spring at one end and is connected electrically to the circuit structure at the other end, and
wherein each second suspension wire is integrally formed with the outer portion of the second upper plate spring at one end and is connected electrically to the circuit structure at the other end.
2. The lens driving device according to claim 1 , wherein the upper plate spring portion elastically holds the lens holder along the optical axis.
3. The lens driving device according to claim 1 , wherein each first suspension wire and each second suspension wire is disposed substantially parallel with the optical axis.
4. The lens driving device according to claim 1 , wherein the focusing coil is connected electrically to the first upper plate spring and the second upper plate spring.
5. The lens driving device according to claim 1 , wherein the focusing coil is connected electrically to the inner portion of the first upper plate spring and the inner portion of the second upper plate spring.
6. The lens driving device according to claim 1 , wherein the OIS coil structure is disposed on a plane perpendicular to the optical axis.
7. The lens driving device according to claim 1 , wherein the plurality of magnets comprises:
a plurality of first magnets respectively having a first surface facing to the focusing coil; and
a plurality of second magnets respectively having a second surface facing to the respective coil of the OIS coil structure.
8. The lens driving device according to claim 7 , wherein the first magnets are the same with the second magnets.
9. The lens driving device according to claim 7 , wherein the first magnets are different from the second magnets.
10. The lens driving device according to claim 1 , wherein the circuit structure is a flexible printed circuit.
11. The lens driving device according to claim 1 , wherein the upper plate spring portion disposed on the top surface of the lens holder.
12. A lens driving device, comprising:
a lens holder for holding a lens having an optical axis;
a focusing coil disposed at a periphery of the lens with respect to the optical axis;
an optical image stabilizer (OIS) coil structure comprising a plurality of coils;
a circuit structure connected electrically to the OIS coil structure and taking control thereof;
a plurality of magnets; and
an elastic support structure, having an upper plate spring portion and a plurality of suspension wires, wherein each suspension wire is disposed substantially parallel with the optical axis and integrally formed with the upper plate spring portion at one end and connected electrically to the circuit structure at the other end,
wherein the upper plate spring portion includes at least a first upper plate spring and at least a second upper plate spring, and the plurality of suspension wires includes two first suspension wires and two second suspension wires,
wherein the first upper plate spring comprises an inner portion and an outer portion having no electrical connection thereto,
wherein the second upper plate spring comprises an inner portion and an outer portion having no electrical connection thereto,
wherein each first suspension wire is integrally formed with the outer portion of the first upper plate spring at one end and is connected electrically to the circuit structure at the other end, and
wherein each second suspension wire is integrally formed with the outer portion of the second upper plate spring at one end and is connected electrically to the circuit structure at the other end.
13. The lens driving device according to claim 12 , wherein the focusing coil is connected electrically to the outer portion of the first upper plate spring and the outer portion of the second upper plate spring.
14. The lens driving device according to claim 12 , wherein the upper plate spring portion elastically holds the lens holder along the optical axis.
15. The lens driving device according to claim 12 , wherein each first suspension wire and each second suspension wire is disposed substantially parallel with the optical axis.
16. The lens driving device according to claim 12 , wherein the focusing coil is connected electrically to the first upper plate spring and the second upper plate spring.
17. The lens driving device according to claim 12 , wherein the OIS coil structure is disposed on a plane perpendicular to the optical axis.
18. The lens driving device according to claim 12 , wherein the plurality of magnets comprises:
a plurality of first magnets respectively having a first surface facing to the focusing coil; and
a plurality of second magnets respectively having a second surface facing to the respective coil of the OIS coil structure.
19. The lens driving device according to claim 18 , wherein the first magnets are the same with the second magnets.
20. The lens driving device according to claim 18 , wherein the first magnets are different from the second magnets.
21. The lens driving device according to claim 12 , wherein the circuit structure is a flexible printed circuit.
22. The lens driving device according to claim 12 , wherein the upper plate spring portion disposed on the top surface of the lens holder.