IP Library › Granted Patent US 12695270
Granted Patent B2
US 12695270 · App. 18/301,994 · Granted Jul 28, 2026

Light-emitting array, light-emitting device, measurement apparatus, and method for manufacturing light-emitting array

Inventors: Daisuke Iguchi (Kanagawa, JP); Kei Takeyama (Kanagawa, JP); Seiji Ono (Kanagawa, JP); Tomoaki Sakita (Kanagawa, JP); Takashi Kondo (Kanagawa, JP); Junichiro Hayakawa (Kanagawa, JP)
Assignee: FUJIFILM Business Innovation Corp.
H01S5/042G01B11/24G01S7/484G01S17/89H01S5/42
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Quick Facts
Patent No.
US 12695270
App. No.
18/301,994
Granted
Jul 28, 2026
Kind
B2
Abstract

A light-emitting array includes a light-emitting part having plural light-emitting block, a selection part that operates with a reference potential supplied from a reference part provided on an outside as a reference and selects the light-emitting block to be made to emit light, and a disconnection part that disconnects connection of the selection part and the reference part in a period during which a light emission current caused by low-side drive is flowing in the light-emitting block.

Claims (53)

1 . A light-emitting array comprising:

a light-emitting part having a plurality of light-emitting blocks;

a selection part that comprises a plurality of shift thyristors and operates with a reference potential supplied from a reference part which is connected to the reference potential which is ground potential and is provided on an outside as a reference and selects the light-emitting block to be made to emit light; and

a disconnection part that includes a first thyristor disconnects connection of the selection part and the reference part in a period during which a light emission current caused by low-side drive is flowing in the light-emitting block.

2 . The light-emitting array according to claim 1 ,

wherein the disconnection part further includes a resistor, and the first thyristor transits from on to off to disconnect the connection.

3 . The light-emitting array according to claim 2 ,

wherein the selection part further includes a plurality of second thyristors to which an on state is transferred, and

the second thyristors and the first thyristor have a common semiconductor layer.

4 . The light-emitting array according to claim 2 ,

wherein the first thyristor is configured with a semiconductor layer, a region of a two-layered semiconductor layer having a different polarity on the semiconductor layer, and a region of a one-layered semiconductor layer having a different polarity on the semiconductor layer.

5 . The light-emitting array according to claim 1 ,

wherein the disconnection part transits from on to off to disconnect the connection in a case where a light emission current caused by low-side drive flows in the light-emitting block.

6 . A light-emitting device comprising:

the light-emitting array according to claim 1 ; and

a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.

7 . A light-emitting device comprising:

the light-emitting array according to claim 2 ; and

a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.

8 . A light-emitting device comprising:

the light-emitting array according to claim 3 ; and

a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.

9 . A light-emitting device comprising:

the light-emitting array according to claim 4 ; and

a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.

10 . A light-emitting device comprising:

the light-emitting array according to claim 5 ; and

a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.

11 . A measurement apparatus comprising:

the light-emitting device according to claim 6 ; and

a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,

wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.

12 . A measurement apparatus comprising:

the light-emitting device according to claim 7 ; and

a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,

wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.

13 . A measurement apparatus comprising:

the light-emitting device according to claim 8 ; and

a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,

wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.

14 . A measurement apparatus comprising:

the light-emitting device according to claim 9 ; and

a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,

wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.

15 . A measurement apparatus comprising:

the light-emitting device according to claim 10 ; and

a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,

wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.

16 . A method for manufacturing a light-emitting array, the method comprising:

laminating a first semiconductor layer laminate in which a light-emitting element is configured, on a substrate;

laminating a second semiconductor layer laminate in which a thyristor is configured, on the first semiconductor layer laminate;

processing the second semiconductor layer laminate and the first semiconductor layer laminate to separate a light-emitting block including the light-emitting element, and a disconnection part that disconnects connection of a selection part that comprises a plurality of shift thyristors and selects the light-emitting block to be made to emit light and a reference part that is connected to ground potential and is provided on an outside and supplies a reference potential which is the ground potential; and

processing the second semiconductor layer laminate to form a first thyristor included in the disconnection part which includes a first thyristor and a second thyristor included in the selection part.