US 11,754,816 B2
Photographing lens assembly, image capturing unit and electronic device
Hsin-Hsuan Huang, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Dec. 28, 2021, as Appl. No. 17/564,009.
Application 17/564,009 is a continuation of application No. 16/698,793, filed on Nov. 27, 2019, granted, now 11,243,382.
Application 16/698,793 is a continuation of application No. 15/893,516, filed on Feb. 9, 2018, granted, now 10,539,762, issued on Jan. 21, 2020.
Application 15/893,516 is a continuation of application No. 15/204,726, filed on Jul. 7, 2016, granted, now 9,927,598, issued on Mar. 27, 2018.
Application 15/204,726 is a continuation of application No. 14/812,570, filed on Jul. 29, 2015, granted, now 9,417,434, issued on Aug. 16, 2016.
Claims priority of application No. 104112136 (TW), filed on Apr. 15, 2015.
Prior Publication US 2022/0121013 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 13/00 (2006.01); G02B 9/62 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 27/0025 (2013.01)] 19 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, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the first lens element has positive refractive power, the fifth lens element has negative refractive power, the image-side surface of the fifth lens element is concave in a paraxial region thereof, the sixth lens element has positive refractive power, the image-side surface of the sixth lens element is convex in a paraxial region thereof, and at least one of the object-side and the image-side surfaces of the six lens elements has at least one inflection point;
wherein a focal length of the photographing lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, an axial distance between the image-side surface of the sixth lens element and an image surface is BL, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, 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:
|f1|<|fi|, wherein i=2,3,4,5,6;
−1.0<f/f5<0;
0.1<BL/TD<0.25; and
−3.5<(R5+R6)/(R5−R6)<1.2.