Light-emitting component, optical measurement device, image forming apparatus, and method for manufacturing light-emitting component

Patent metadata

Field	Value
Publication number	US-2023378370-A1
Application number	US-202318362003-A
Country	US
Kind code	A1
Filing date	Jul 31, 2023
Priority date	Apr 26, 2021
Publication date	Nov 23, 2023
Grant date	—

Abstract

A light-emitting component includes a substrate and a light-emitting element provided on the substrate and configured to emit light in a direction intersecting a surface of the substrate. The light-emitting element includes a thyristor having an opening through which light is emitted, and an inner surface of the opening is covered with a light shield that suppresses transmission of light.

First claim

What is claimed is:

1 . A light-emitting component comprising:
a substrate; and a light-emitting element provided on the substrate and configured to emit light in a direction intersecting a surface of the substrate, wherein: the light-emitting element includes a thyristor having an opening through which light is emitted, and an inner surface of the opening is covered with a light shield that suppresses transmission of light.

2 . The light-emitting component according to claim 1 , wherein:
the light shield is made of a metal, and an insulating portion is provided between the thyristor and the light shield.

3 . The light-emitting component according to claim 2 , wherein the light shield extends from an electrode electrically connected to the thyristor to the inner surface of the opening.

4 . The light-emitting component according to claim 2 , wherein the light shield extends from a current supply wire electrically connected to the thyristor to the inner surface of the opening.

5 . The light-emitting component according to claim 1 , wherein the light shield is made of an insulator.

6 . The light-emitting component according to claim 1 , wherein:
the light-emitting element further includes an electrode, and the light shield further covers the electrode.

7 . The light-emitting component according to claim 1 , wherein the light shield is made of a metal and covers the electrode with an insulating portion therebetween.

8 . The light-emitting component according to claim 1 , wherein the light shield is a light absorbing body that absorbs light.

9 . The light-emitting component according to claim 8 , wherein at least one of layers constituting the thyristor absorbs light having a longer wavelength than the emitted light.

10 . The light-emitting component according to claim 1 , wherein the light shield covers a portion of the inner surface of the opening.

11 . The light-emitting component according to claim 1 , wherein the light shield is a light reflector that reflects light.

12 . An optical measurement device comprising:
the light-emitting component according to claim 1 ; a light-receiving unit configured to receive light reflected from an object irradiated with the light emitted from the light-emitting component; and a processing unit configured to process information related to the light received by the light-receiving unit to measure the distance from the light-emitting component to the object or the shape of the object.

13 . An optical measurement device comprising:
the light-emitting component according to claim 2 ; a light-receiving unit configured to receive light reflected from an object irradiated with the light emitted from the light-emitting component; and a processing unit configured to process information related to the light received by the light-receiving unit to measure the distance from the light-emitting component to the object or the shape of the object.

14 . An optical measurement device comprising:
the light-emitting component according to claim 3 ; a light-receiving unit configured to receive light reflected from an object irradiated with the light emitted from the light-emitting component; and a processing unit configured to process information related to the light received by the light-receiving unit to measure the distance from the light-emitting component to the object or the shape of the object.

15 . An image forming apparatus comprising:
the light-emitting component according to claim 1 ; and a drive controller configured to receive input of an image signal and drive the light-emitting component according to the image signal so that a two-dimensional image is formed by the light emitted from the light-emitting component.

16 . A method for manufacturing a light-emitting component, the method comprising, in this sequence:
forming layers to form a thyristor on a substrate; providing, in the thyristor, an opening through which light is emitted in a direction intersecting a surface of the substrate; and covering the thyristor and an inner surface of the opening with a light shield that suppresses transmission of light.

17 . The method for manufacturing the light-emitting component according to claim 16 , wherein the light shield is made of a metal and is formed as an electrode so as to extend from the inner surface of the opening over the thyristor.

18 . The method for manufacturing the light-emitting component according to claim 16 , wherein the light shield is made of a metal and is formed, as a current supply wire electrically connected to the thyristor, so as to extend from the inner surface of the opening over the thyristor.

19 . A method for manufacturing a light-emitting component, the method comprising, in this sequence:
forming layers to form a thyristor on a substrate; forming an electrode on the thyristor; providing, in the thyristor, an opening through which light is emitted in a direction intersecting a surface of the substrate; and covering the thyristor and an inner surface of the opening with a light shield that suppresses transmission of light.

20 . The method for manufacturing the light-emitting component according to claim 19 , wherein the light shield is made of a metal and is formed so as to cover the electrode with an insulating portion therebetween.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Kondo Takashi
• Murata Michiaki
• Hayakawa Junichiro
• Higuchi Takafumi

Classifications

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10D18/00

  Thyristors · CPC title

• H10D30/6755 Primary

  Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate · CPC title

• H01L29/7869 Primary

  Electricity · mapped topic

• B41J2/451

  Special optical means therefor, e.g. lenses, mirrors, focusing means · CPC title