US 11,656,442 B2
Photographing lens assembly, imaging apparatus and electronic device
Hung-Shuo Chen, Taichung (TW); and Hsin-Hsuan Huang, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Jan. 17, 2022, as Appl. No. 17/577,063.
Application 17/577,063 is a continuation of application No. 16/861,272, filed on Apr. 29, 2020, granted, now 11,262,553.
Application 16/861,272 is a continuation of application No. 16/034,768, filed on Jul. 13, 2018, granted, now 10,678,025, issued on Jun. 9, 2020.
Claims priority of application No. 106145560 (TW), filed on Dec. 25, 2017.
Prior Publication US 2022/0137371 A1, May 5, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); H04N 5/225 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); H04N 5/2254 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side:
a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element; each of the seven lens elements having an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the object-side surface of the first lens element is concave in a paraxial region thereof; the third lens element has positive refractive power; the image-side surface of the seventh lens element is concave in a paraxial region thereof and comprises at least one convex surface in an off-axis region thereof;
wherein a focal length of the first lens element is f1, a focal length of the third lens element is f3, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, and the following conditions are satisfied:
|f3/f1|<0.90; and
0.10<(R5+R6)/(R5−R6)<8.0.