US 12,444,904 B2
Light source device and electronic device
Takashi Masuda, Kanagawa (JP); Mitsushi Tabata, Kanagawa (JP); Koichi Okamoto, Kanagawa (JP); and Yasuo Oba, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/310,334
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Jan. 16, 2020, PCT No. PCT/JP2020/001169
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/162129, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 2019-019214 (JP), filed on Feb. 5, 2019.
Prior Publication US 2022/0094139 A1, Mar. 24, 2022
Int. Cl. H01S 5/026 (2006.01); H01S 5/042 (2006.01); H01S 5/068 (2006.01); H01S 5/42 (2006.01)
CPC H01S 5/042 (2013.01) [H01S 5/0261 (2013.01); H01S 5/06808 (2013.01); H01S 5/06825 (2013.01); H01S 5/423 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A light source device, comprising:
a first resistor connected to a specific potential;
an element array that includes a plurality of light elements, wherein
the first resistor is connected to the element array at a first connection part,
the first connection part is associated with a first voltage,
the element array is connected in series to the first resistor, and
the plurality of light elements includes a set of light elements;
a set of current sources, wherein
each current source of the set of current sources is configured to supply a first amount of current to a corresponding light element of the set of light elements, and
each light element of the set of light elements is configured to emit, based on the supplied first amount of current to the corresponding light element,
a specific amount of light;
a second resistor connected to the specific potential; and
a specific current source connected in series to the second resistor, wherein
the specific current source is configured to supply a second amount of current to the element array,
the second amount of current is based on:
a number of elements of the set of light elements, and
an addition of a specific amount of current corresponding to an overcurrent and the first amount of current,
the second resistor is connected to the specific current source at a second connection part, and
the second connection part is associated with a second voltage.