US 11,885,940 B2
Photographing lens assembly, image capturing unit and electronic device
Po-Lun Hsu, Taichung (TW); Wei-Yu Chen, Taichung (TW); Kuan-Ting Yeh, Taichung (TW); and Ssu-Hsin Liu, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Apr. 14, 2022, as Appl. No. 17/721,258.
Application 16/838,843 is a division of application No. 15/796,276, filed on Oct. 27, 2017, granted, now 10,649,179, issued on May 12, 2020.
Application 17/721,258 is a continuation of application No. 16/838,843, filed on Apr. 2, 2020, granted, now 11,333,862.
Claims priority of application No. 106112689 (TW), filed on Apr. 14, 2017.
Prior Publication US 2022/0244504 A1, Aug. 4, 2022
Int. Cl. G02B 3/02 (2006.01); G02B 13/18 (2006.01); G02B 13/00 (2006.01); G02B 9/62 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A photographing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side:
a first lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof, wherein the object-side surface of the first lens element has at least one convex critical point in an off-axis region thereof;
a second lens element;
a third lens element having positive refractive power;
a fourth lens element having positive refractive power;
a fifth lens element having negative refractive power; and
a sixth lens element having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the sixth lens element has at least one convex critical point in an off-axis region thereof, and the object-side surface and the image-side surface of the sixth lens element are both aspheric;
wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of an image-side surface of the first lens element is R2, an f-number of the photographing lens assembly is FNo, and the following conditions are satisfied:
|R1/R2|<5.0; and
1.25<FNo≤2.43.