Light-emitting module and integrated light-emitting module

Patent metadata

Field	Value
Publication number	US-10595367-B2
Application number	US-201816167387-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Oct 23, 2017
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A light-emitting module includes: a base body including electrical conductor wirings; a light-emitting element disposed on the base body and electrically connected to the electrical conductor wirings; a light reflection film disposed on an upper surface of the light-emitting element; and a half mirror disposed on a light extraction surface side of the light-emitting element and spaced apart from the light-emitting element. A spectral reflectance of the half mirror under perpendicular incidence at a wavelength longer than a peak emission wavelength of a light emitted from the light-emitting element is greater than a spectral reflectance of the half mirror under perpendicular incidence at the peak emission wavelength.

First claim

What is claimed is:

1. A light-emitting module comprising:
a base body comprising electrical conductor wirings;
a light-emitting element disposed on the base body and electrically connected to the electrical conductor wirings;
a light reflection film disposed on an upper surface of the light-emitting element; and
a half mirror disposed on a light extraction surface side of the light-emitting element and spaced apart from the light-emitting element;
wherein a spectral reflectance of the half mirror under perpendicular incidence at a wavelength longer than a peak emission wavelength of light emitted from the light-emitting element is greater than a spectral reflectance of the half mirror under perpendicular incidence at the peak emission wavelength, and
wherein, when an emission peak wavelength region is defined as a wavelength region with a predetermined width including a peak emission wavelength at a center thereof, a spectral reflectance of the half mirror under perpendicular incidence in a wavelength region located 50 nm from the emission peak wavelength region on a longer wavelength side of the light-emitting element is 10% or more greater than a spectral reflectance of the half mirror under perpendicular incidence in the emission peak wavelength region of the light-emitting element.

2. The light-emitting module of claim 1 , wherein a spectral reflectance of the half mirror under perpendicular incidence in the emission peak wavelength region of the light-emitting element is in a range of 30% to 65%.

3. The light-emitting module of claim 1 , further comprising:
a sealing member covering the light-emitting element and the light reflection film;
wherein a ratio H/W of a height H to a width W of the sealing member is smaller than 0.5.

4. The light-emitting module of claim 3 , wherein the ratio H/W is 0.3 or smaller.

5. The light-emitting module of claim 1 , wherein a reflection wavelength band of the light reflection film under perpendicular incidence includes a peak emission wavelength of the light-emitting element, and is wider on a longer wavelength side of the emission peak wavelength than on a shorter wavelength side.

6. The light-emitting module of claim 1 , wherein 30% or more of a total amount of light emitted from the light-emitting element is emitted at an angle of elevation less than 20° with respect to the upper surface of the base body.

7. The light-emitting module of claim 1 , wherein 40% or more of a total amount of light emitted from the light-emitting element is emitted at an angle of elevation that is less than 20° with respect to the upper surface of the base body.

8. The light-emitting module of claim 1 , wherein the light-emitting element is flip-chip mounted on the base body.

9. The light-emitting module of claim 1 , further comprising a wavelength conversion member disposed on the light extraction surface side of the light-emitting element, the wavelength conversion member being adapted to absorb a portion of light emitted from the light-emitting element and to emit light of a wavelength different from an emission wavelength of the light-emitting element.

10. An integrated light-emitting module comprising:
a plurality of the light-emitting modules of claim 1 ; and
a plurality of light-reflecting members, each disposed between an adjacent two of the plurality of light-emitting modules.

11. The integrated light-emitting module of claim 10 , wherein a height of each light-reflecting member is equal to or less than 0.3 times a distance between the light-emitting modules.

12. The integrated light-emitting module of claim 10 , wherein a height of each light-reflecting member is equal to or less than 0.2 times a distance between the light-emitting modules.

Assignees

• Nichia Corp

Inventors

• Yamada Motokazu

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H05B33/02 Primary

  Details · CPC title

• G02F1/133602

  Direct backlight · CPC title

• H01L33/62

  Electricity · mapped topic

• H01L33/50

  Electricity · mapped topic