US 12,265,278 B2
Lens driving apparatus
Chun-Yi Lu, Taichung (TW); Te-Sheng Tseng, Taichung (TW); and Wen-Hung Hsu, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Jan. 3, 2024, as Appl. No. 18/402,818.
Application 18/402,818 is a continuation of application No. 17/709,658, filed on Mar. 31, 2022, granted, now 11,899,272.
Application 17/709,658 is a continuation of application No. 16/720,086, filed on Dec. 19, 2019, granted, now 11,314,039, issued on Apr. 26, 2022.
Application 16/720,086 is a continuation of application No. 16/194,424, filed on Nov. 19, 2018, granted, now 10,545,310, issued on Jan. 28, 2020.
Application 16/194,424 is a continuation of application No. 15/686,347, filed on Aug. 25, 2017, granted, now 10,162,150, issued on Dec. 25, 2018.
Application 15/686,347 is a continuation of application No. 14/476,929, filed on Sep. 4, 2014, granted, now 9,778,436, issued on Oct. 3, 2017.
Claims priority of application No. 103213501 (TW), filed on Jul. 30, 2014.
Prior Publication US 2024/0134150 A1, Apr. 25, 2024
Prior Publication US 2024/0231040 A9, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 7/09 (2021.01); G03B 3/10 (2021.01)
CPC G02B 7/09 (2013.01) [G03B 3/10 (2013.01); G03B 2205/0069 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A lens driving apparatus, comprising:
a holder, comprising an opening hole;
a cover coupled to one side of the holder;
a carrier movably disposed in the cover, and for coupling to a lens;
at least one first magnet arranged in an inner part of the cover;
a coil and the at least one first magnet configured to face each other and configured to drive the carrier and the lens to be movable in the cover;
at least one second magnet disposed on the carrier; and
a hall sensor for detecting a magnetic field of the at least one second magnet, wherein the magnetic field is varied according to a relative displacement in a direction parallel to an optical axis of the lens between the hall sensor and the second magnet which is detected;
wherein the second magnet and the hall sensor are not overlapped with each other in a direction orthogonal to the optical axis;
wherein a component parallel to the optical axis of the lens of a distance between the hall sensor and the second magnet which is detected by the Hall sensor is d1, and the following condition is satisfied:
d1<1.4 mm.