US 12,081,853 B2
Camera module and electronic device
Wen-Yu Tsai, Taichung (TW); Chien-Pang Chang, Taichung (TW); Lin-An Chang, Taichung (TW); Ming-Ta Chou, Taichung (TW); and Kuo-Chiang Chu, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on May 18, 2022, as Appl. No. 17/747,015.
Claims priority of provisional application 63/209,017, filed on Jun. 10, 2021.
Claims priority of application No. 110137430 (TW), filed on Oct. 8, 2021.
Prior Publication US 2022/0400193 A1, Dec. 15, 2022
Int. Cl. H04N 23/55 (2023.01); G02B 1/115 (2015.01); H04N 23/54 (2023.01)
CPC H04N 23/55 (2023.01) [G02B 1/115 (2013.01); H04N 23/54 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A camera module, comprising:
an imaging lens assembly;
an image sensor disposed on an image surface of the imaging lens assembly; and
an optical plate disposed between the imaging lens assembly and the image sensor, comprising:
a substrate having an object-side surface and an image-side surface, the object-side surface facing towards an object side, the image-side surface facing towards an image side, and the object-side surface being parallel with the image-side surface; and
at least one anti-reflection layer disposed on the image-side surface of the substrate, the at least one anti-reflection layer comprising a nanocrystal structure layer and an optical-connecting layer, wherein the nanocrystal structure layer comprises a metal oxide crystal, the optical-connecting layer connects the substrate and the nanocrystal structure layer, the nanocrystal structure layer is physically contacted with the optical-connecting layer, and the nanocrystal structure layer is arranged irregularly;
wherein a material refractive index of the nanocrystal structure layer is Nc, a material refractive index of the optical-connecting layer is Nf, a height of the nanocrystal structure layer is Hc, a thickness of the optical-connecting layer is Hf, a total height of the anti-reflection layer is H, and the following conditions are satisfied:
Nf<Nc;
Hf+Hc=H; and
Hf<Hc.