Light emitting module and automotive illumination device including the same

Patent metadata

Field	Value
Publication number	US-10998375-B2
Application number	US-201916512850-A
Country	US
Kind code	B2
Filing date	Jul 16, 2019
Priority date	Nov 13, 2018
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Disclosed are light emitting modules and automobile illumination devices including the same. The light emitting module comprises a module substrate, a light emitting device on the module substrate, and a light guide structure apart from the module substrate and in plan view surrounding the light emitting device. The light emitting device comprises a first pixel and a second pixel each including a light emitting diode (LED) chip that emits light whose wavelength falls within a range of blue color or ultraviolet ray, and a wavelength conversion material on a top surface of at least one of the first and second pixels.

First claim

What is claimed is:

1. A light emitting module, comprising:
a module substrate;
a light emitting device on the module substrate; and
a light guide structure apart from the module substrate and surrounding the light emitting device in plan view,
wherein the light emitting device comprises
a first pixel and a second pixel each including a light emitting diode (LED) chip configured to emit light whose wavelength falls within a range of blue color or ultraviolet ray; and
a wavelength conversion material on a top surface of at least one of the first and second pixels, and

wherein an interval between the light emitting device and the light guide structure is in a range from about 0.1 mm to about 5 mm.

2. The light emitting module of claim 1 , wherein the light guide structure and the light emitting device have an air layer therebetween.

3. The light emitting module of claim 1 , wherein the light emitting device further comprises a pixel isolation pattern between and defining the first pixel and the second pixel,
wherein the LED chip of the first pixel emits light whose wavelength is the same as a wavelength of light emitted from the LED chip of the second pixel.

4. The light emitting module of claim 3 , further comprising:
a plurality of fluorescent layers correspondingly provided on the first and second pixels and each including the wavelength conversion material; and
a plurality of partition wall structures on the pixel isolation pattern and surrounding the fluorescent layers in the plan view,
wherein the partition wall structures include a silicon substrate.

5. The light emitting module of claim 1 , wherein the light emitting device has a pixel array region,
wherein the pixel array region includes the first pixel, the second pixel, and a first partition between the first and second pixels,
a diameter of the light guide structure being the same as or greater than a diameter of the pixel array region.

6. The light emitting module of claim 1 , wherein the light guide structure and the light emitting device have a resin layer therebetween.

7. The light emitting module of claim 1 , wherein the wavelength conversion material includes a quantum dot fluorescent material having a nano-sized particle.

8. The light emitting module of claim 1 , wherein the light guide structure has an elongated cylindrical waveguide.

9. A light emitting module, comprising:
a module substrate;
a light emitting device on the module substrate; and
a light guide structure apart from the module substrate and guiding light emitted from the light emitting device,
wherein the light emitting device comprises
a first pixel and a second pixel each including a light emitting diode (LED) chip that emits light whose wavelength falls within a range of blue color or ultraviolet ray; and
a wavelength conversion material on a top surface of at least one of the first and second pixels, and

wherein an interval between the light emitting device and the light guide structure is in a range from about 0.1 mm to about 5 mm.

10. The light emitting module of claim 9 , wherein the light guide structure and the light emitting device have an air layer therebetween.

11. The light emitting module of claim 9 , wherein the light emitting device further comprises a pixel isolation pattern between and defining the first pixel and the second pixel,
wherein a peak wavelength of light emitted from each LED chip of the first and second pixels has a range equal to or less than about 5% of an average peak wavelength of the light emitted from the LED chip of the first and second pixels.

12. The light emitting module of claim 11 , further comprising:
a fluorescent layer on the LED chip and including the wavelength conversion material; and
a partition surrounding the fluorescent layer, when viewed in plan,
wherein the partition includes a silicon substrate.

13. The light emitting module of claim 9 , further comprising a plurality of bonding wires on an edge region of the light emitting device and coupled to the light emitting device and the module substrate.

14. An automobile illumination device, comprising:
a module substrate;
a light emitting device on the module substrate; and
a light guide structure apart from the module substrate and guiding light emitted from the light emitting device,
wherein the light emitting device comprises
a first pixel and a second pixel each including a light emitting diode (LED) chip configured to emit light whose wavelength falls within a range of blue color or ultraviolet ray; and
a wavelength conversion material on a top surface of at least one of the first and second pixels, and

wherein an interval between the light emitting device and the light guide structure is in a range from about 0.1 mm to about 5 mm.

15. The automobile illumination device of claim 14 , wherein the light guide structure and the light emitting device have an air layer therebetween.

16. The automobile illumination device of claim 14 , wherein the light emitting device further comprises a pixel isolation pattern between and defining the first pixel and the second pixel,
wherein a peak wavelength of light emitted from each LED chip of the first and second pixels has a range equal to or less than about 5% of an average peak wavelength of the light emitted from the LED chip of the first and second pixels.

17. The automobile illumination device of claim 14 , further comprising:
a fluorescent layer on the LED chip and including the wavelength conversion material; and
a partition surrounding the fluorescent layer, when viewed in plan,
wherein the partition includes a silicon substrate.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Junho
• Kwak Namhyeok
• Kim Gunduk
• Lee Seungwoo
• Kim Do-Hun
• Kim Heedong

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• H10H20/812

  within the light-emitting regions, e.g. having quantum confinement structures · CPC title

• H10H29/142 Primary

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