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

Patent metadata

Field	Value
Publication number	US-2024106194-A1
Application number	US-202318301994-A
Country	US
Kind code	A1
Filing date	Apr 18, 2023
Priority date	Sep 27, 2022
Publication date	Mar 28, 2024
Grant date	—

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.

First claim

What is claimed is:

1 . A light-emitting array comprising:
a light-emitting part having a plurality of light-emitting blocks; 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.

2 . The light-emitting array according to claim 1 ,
wherein the disconnection part includes a first thyristor and 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 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 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 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 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 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 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 selects the light-emitting block to be made to emit light and a reference part that is provided on an outside and supplies a reference potential; and processing the second semiconductor layer laminate to form a first thyristor included in the disconnection part and a second thyristor included in the selection part.

Assignees

• Fujifilm Business Innovation Corp
• Fujifilm Corp

Inventors

• Iguchi Daisuke
• Takeyama Kei
• Ono Seiji
• Sakita Tomoaki
• Kondo Takashi
• Hayakawa Junichiro

Classifications

• H01S5/042 Primary

  Electrical excitation {; Circuits therefor (monolithically integrated laser drive components H01S5/0261)} · CPC title

• G01B11/24

  for measuring contours or curvatures · CPC title

• G01S7/484

  Transmitters · CPC title

• G01S17/89

  for mapping or imaging · CPC title

• H01S5/42

  Arrays of surface emitting lasers · CPC title