US 11,656,497 B2
Light emitting module and optical lens thereof
Lung-Kuan Lai, Hsinchu (TW); Ting-Kai Chen, Hsinchu (TW); and Jiun-Hong Lin, Hsinchu (TW)
Assigned to Lextar Electronics Corporation, Hsinchu (TW)
Filed by Lextar Electronics Corporation, Hsinchu (TW)
Filed on May 25, 2021, as Appl. No. 17/329,140.
Prior Publication US 2022/0382106 A1, Dec. 1, 2022
Int. Cl. G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/133607 (2021.01) [G02F 1/133603 (2013.01); G02F 1/133611 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical lens comprising:
an optical transparent body comprising:
an upper surface comprising a central upper concave portion, an outwardly-convex curved surface continuous from the central upper concave portion, and an inwardly-concave curved surface continuous from the outwardly-convex curved surface;
a lower surface;
a lateral surface connected between the inwardly-concave curved surface and the lower surface, wherein a first interface between the inwardly-concave curved surface and the lateral surface is closer to the lower surface than a curved interface between the outwardly-convex curved surface and the inwardly-concave curved surface, wherein the inwardly-concave curved surface is configured to refract light beams downwards; and
a lower concave portion recessed from the lower surface.