US 11,899,279 B2
Electronic device
Hung-Shuo Chen, Taichung (TW); Chien-Hsun Wu, Taichung (TW); and Tzu-Chieh Kuo, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Mar. 15, 2023, as Appl. No. 18/184,056.
Application 18/184,056 is a continuation of application No. 17/475,420, filed on Sep. 15, 2021, granted, now 11,640,044.
Application 17/475,420 is a continuation of application No. 16/819,276, filed on Mar. 16, 2020, granted, now 11,150,441, issued on Oct. 19, 2021.
Application 16/819,276 is a continuation of application No. 15/869,314, filed on Jan. 12, 2018, granted, now 10,634,873, issued on Apr. 28, 2020.
Claims priority of provisional application 62/565,173, filed on Sep. 29, 2017.
Prior Publication US 2023/0213733 A1, Jul. 6, 2023
Int. Cl. G02B 13/14 (2006.01); G02B 13/00 (2006.01); G02B 9/34 (2006.01); G02B 9/58 (2006.01); H04N 5/33 (2023.01); G01B 11/24 (2006.01); H04N 13/225 (2018.01); H04N 13/254 (2018.01); H04N 23/20 (2023.01); H04N 23/55 (2023.01)
CPC G02B 9/34 (2013.01) [G02B 9/58 (2013.01); G02B 13/004 (2013.01); G02B 13/14 (2013.01); G01B 11/24 (2013.01); H04N 5/33 (2013.01); H04N 13/225 (2018.05); H04N 13/254 (2018.05); H04N 23/20 (2023.01); H04N 23/55 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device, comprising an optical lens assembly, which comprises four lens elements, the four lens elements being in order from an outside to an inside:
a first lens element, a second lens element, a third lens element and a fourth lens element;
wherein each of the four lens elements has an outside surface facing towards the outside and an inside surface facing towards the inside;
wherein the outside surface of the first lens element is convex in a paraxial region thereof; the inside surface of the fourth lens element is concave in a paraxial region thereof; at least one of the outside surface and the inside surface of the fourth lens element comprises at least one critical point in an off-axis region thereof;
wherein, when a measurement is made in accordance with a reference wavelength as a d-line, an Abbe number of the first lens element is Vd1, an Abbe number of the second lens element is Vd2, an Abbe number of the third lens element is Vd3, an Abbe number of the fourth lens element is Vd4; a central thickness of the second lens element is CT2, a central thickness of the fourth lens element is CT4, an f-number of the optical lens assembly is Fno, and the following conditions are satisfied:
0.65<Vd1/Vd2<1.54;
0.65<Vd1/Vd3<1.54;
0.65<Vd1/Vd4<1.54;
10.0<Vd1<38.0;
0<CT2/CT4<1.04; and
1.0<Fno≤1.80.