US 12,278,294 B2
Photo detecting device
Masanobu Ikeda, Minato-ku (JP); and Yasuhiro Kanaya, Minato-ku (JP)
Assigned to Japan Display Inc., Tokyo (JP)
Filed by Japan Display Inc., Tokyo (JP)
Filed on Feb. 11, 2022, as Appl. No. 17/650,718.
Application 17/650,718 is a continuation of application No. PCT/JP2020/026068, filed on Jul. 2, 2020.
Claims priority of application No. 2019-154816 (JP), filed on Aug. 27, 2019.
Prior Publication US 2022/0165891 A1, May 26, 2022
Int. Cl. H01L 31/0224 (2006.01); H01L 31/02 (2006.01); H01L 31/0216 (2014.01); H01L 33/32 (2010.01)
CPC H01L 31/02161 (2013.01) [H01L 31/02024 (2013.01); H01L 31/0224 (2013.01); H01L 33/32 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A photo detecting device comprising:
a substrate;
a plurality of photoelectric conversion elements provided to the substrate and configured to output a detection signal corresponding to light with which the photoelectric conversion elements are irradiated;
at least one or more light emitting elements provided to the substrate; and
a control circuit configured to set a wavelength of light output from the light emitting element by controlling an electric current flowing through the light emitting element, wherein
the photoelectric conversion elements are provided to an upper side of a first main surface of the substrate,
the light emitting element is provided to a lower side of a second main surface opposite to the first main surface, and
a through hole passing through the first main surface and the second main surface of the substrate is formed in a region overlapping the light emitting element and not overlapping the photoelectric conversion elements.