US 12,135,441 B2
Lenticular lens with a gradient
Jan Van Der Horst, Veldhoven (NL); Silvino Jose Antuna Presa, Veldhoven (NL); and Bas Koen Böggemann, Veldhoven (NL)
Assigned to ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL CO., LTD., Jiangsu (CN)
Appl. No. 17/419,343
Filed by ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL CO. LTD, Zhangjiagang (CN)
PCT Filed Dec. 30, 2019, PCT No. PCT/CN2019/129916
§ 371(c)(1), (2) Date Jun. 29, 2021,
PCT Pub. No. WO2020/140867, PCT Pub. Date Jul. 9, 2020.
Claims priority of application No. 2022328 (NL), filed on Dec. 30, 2018.
Prior Publication US 2022/0075205 A1, Mar. 10, 2022
Int. Cl. G02B 30/29 (2020.01); H04N 13/305 (2018.01)
CPC G02B 30/29 (2020.01) [H04N 13/305 (2018.05)] 12 Claims
OG exemplary drawing
 
1. A lenticular lens comprising an array of elongate lenticular elements extending parallel to one another, the array comprising
a first edge and a second edge extending parallel to the elongate lenticular elements;
a central line that is centered between the first edge and the second edge:
wherein the elongate lenticular elements have
a length, which is the distance between their two ends;
a middle, which is centered between the two ends;
a focal length, which allows the elongate lenticular elements to converge or diverge light;
characterized in that
the focal length of the elongate lenticular elements gradually decreases from the first edge of the array towards the central line as well as from the second edge of the array towards the central line;
a method for the manufacture of the lenticular lens comprising
providing a non-gradient lenticular lens wherein the elongate lenticular elements have equal focal lengths; then
changing the curvature of the elongate lenticular elements by adding a layer of a certain material on top of the elongate lenticular elements, wherein the material is the same as the material of the non-gradient lenticular lens;
or
a method for the manufacture of the lenticular lens comprising
providing a non-gradient lenticular lens wherein the elongate lenticular elements have equal focal lengths; then
changing the curvature of the elongate lenticular elements by removing part of the surface of the non-gradient lenticular lens.