US 12,279,492 B2
Optical module and image display device
Takumi Kodama, Chino (JP); and Yuiga Hamade, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 24, 2022, as Appl. No. 17/703,963.
Claims priority of application No. 2021-051766 (JP), filed on Mar. 25, 2021.
Prior Publication US 2022/0310764 A1, Sep. 29, 2022
Int. Cl. H10K 59/131 (2023.01); G02B 17/08 (2006.01); G02B 27/01 (2006.01); G02B 27/14 (2006.01); G03B 21/20 (2006.01); H10K 59/32 (2023.01)
CPC H10K 59/131 (2023.02) [G02B 17/086 (2013.01); G02B 27/0172 (2013.01); G02B 27/0176 (2013.01); G02B 27/149 (2013.01); G03B 21/2013 (2013.01); G03B 21/2033 (2013.01); G03B 21/2053 (2013.01); H10K 59/32 (2023.02); G02B 2027/0114 (2013.01); G02B 2027/0178 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An optical module comprising:
a parent substrate including a power supply circuit to which a power source voltage is supplied and generating a first reference voltage and a second reference voltage;
a first substrate including a power supply circuit to which the first reference voltage is supplied and generating a first potential and a second potential;
a second substrate including a power supply circuit to which the second reference voltage is supplied and generating a third potential and a fourth potential;
a first panel including:
a first light-emitting element;
a first power supply wiring provided on one electrode side of the first light-emitting element and to which the first potential is supplied; and
a second power supply wiring provided on another electrode side of the first light-emitting element and to which the second potential is supplied;
a second panel including:
a second light-emitting element having light emission luminance per unit current lower than that of the first light-emitting element;
a third power supply wiring provided on one electrode side of the second light-emitting element and to which the third potential is supplied; and
a fourth power supply wiring provided on another electrode side of the second light-emitting element and to which the fourth potential is supplied; and
a prism configured to synthesize a first image light emitted from the first panel and a second image light emitted from the second panel,
wherein a first potential difference is smaller than a second potential difference, the first potential difference being a difference between the first potential and the second potential, the second potential difference being a difference between the third potential and the fourth potential.