US 11,714,222 B2
Optical device with reduced chromatic aberration and display device including the same
Jong-Young Hong, Suwon-si (KR); Hoon Song, Yongin-si (KR); Jungkwuen An, Suwon-si (KR); and Hongseok Lee, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Dec. 17, 2021, as Appl. No. 17/555,070.
Application 17/555,070 is a continuation of application No. 17/034,923, filed on Sep. 28, 2020, granted, now 11,237,316.
Claims priority of application No. 10-2020-0045237 (KR), filed on Apr. 14, 2020.
Prior Publication US 2022/0107453 A1, Apr. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/003 (2013.01) [G02B 6/005 (2013.01); G02B 6/0076 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An optical device comprising:
a first backlight configured to output first light of a first wavelength, the first backlight comprising a first light guide plate transmitting the first light and comprising a first output coupler through which the first light output;
a first lens disposed to face the first output coupler and having a refractive power with a focal length of f1_1 with respect to the first light of the first wavelength;
a second backlight configured to output second light of a second wavelength, the second backlight comprising a second light guide plate transmitting the second light and comprising a second output coupler through which the second light output, the second output coupler being disposed in parallel to the first output coupler;
a second lens disposed to face the second output coupler and having a refractive power with different focal lengths of f2_1 and f2_2 with respect to the first light of the first wavelength and the second light of the second wavelength, respectively;
a third backlight configured to output third light of a third wavelength, the third backlight comprising a third light guide plate transmitting the third light and comprising a third output coupler through which the third light output, the third output coupler being disposed in parallel to the first output coupler; and
a third lens disposed to face the third output coupler and having a refractive power with different focal lengths of f3_1, f3_2 and f3_3 with respect to the first light of the first wavelength, the second light of the second wavelength, and the third light of the third wavelength, respectively.