US 12,446,428 B2
Optical modulation device and display device
Yuiga Hamade, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/193,619.
Claims priority of application No. 2022-059239 (JP), filed on Mar. 31, 2022.
Prior Publication US 2023/0354666 A1, Nov. 2, 2023
Int. Cl. H10K 59/30 (2023.01); G02B 27/01 (2006.01); H10K 102/00 (2023.01)
CPC H10K 59/30 (2023.02) [G02B 27/0172 (2013.01); G02B 2027/0178 (2013.01); G02B 2207/117 (2013.01); H10K 2102/302 (2023.02); H10K 2102/351 (2023.02)] 9 Claims
OG exemplary drawing
 
1. An optical modulation device comprising:
a first electro-optical device including a first light-emitting element including a light-emitting layer emitting light including a red wavelength region;
a second electro-optical device including a second light-emitting element including a light-emitting layer emitting light including a green wavelength region;
a third electro-optical device including a third light-emitting element including a light-emitting layer emitting light including a blue wavelength region; and
a prism configured to synthesize light emitted from the first electro-optical device, the second electro-optical device, and the third electro-optical device, wherein
each of the first light-emitting element, the second light-emitting element and the third light-emitting element includes
a first electrode,
a second electrode, and
a conductive layer provided between the first electrode and the light-emitting layer, and having a lower reflectance with respect to the light emitted from the light-emitting layer than a reflectance of the first electrode, and
a thickness of the conductive layer of the third light-emitting element is thinner than a thickness of the conductive layer of the first light-emitting element and a thickness of the conductive layer of the second light-emitting element.