Light emitting unit, display, and lighting apparatus

Patent metadata

Field	Value
Publication number	US-12306430-B2
Application number	US-202418430765-A
Country	US
Kind code	B2
Filing date	Feb 2, 2024
Priority date	Apr 11, 2012
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

There are provided a light emitting unit that enhances the uniformity of in-plane colors, as well as a display and a lighting apparatus that include such a light emitting unit thereon. The light emitting unit includes: a plurality of light emitting sections each having a light source and a wavelength conversion member, the wavelength conversion member converting a wavelength of light emitted from the light source; an optical component having a light incident surface in opposition to the plurality of light emitting sections; and a color unevenness prevention structure suppressing direct entering of light from the light source into the optical component.

First claim

What is claimed is:

1. A light emitting unit comprising:
light sources and a wavelength conversion member, the wavelength conversion member converting a wavelength of light emitted from the light sources, the wavelength conversion member including a wavelength conversion material region that includes quantum dots which are encapsulated in a material that prevents deterioration from moisture or oxygen;
a curved optical component having a light incident surface in opposition to the light sources, in which the optical component includes a light emission surface that faces a front side of the light emitting unit, the optical component is positioned such that the wavelength conversion member is between the optical component and the light sources, the optical component is spaced from the wavelength conversion member to have a void therebetween;
at least one light source substrate that supports the light sources and supplies electrical power to the light sources; and
a prevention structure having one or more concave sections, the prevention structure being arranged relative to a first light source and associated first wavelength conversion member that has an associated wavelength conversion material region such that light from the first light source is prevented from being absorbed by neighboring wavelength conversion member regions.

2. The light emitting unit of claim 1 , wherein the light emitting unit is an edge type light apparatus.

3. The light emitting unit of claim 1 , wherein the material is a resin.

4. The light emitting unit of claim 1 , wherein the light emission surface has an uneven pattern.

5. The light emitting unit of claim 4 , wherein the uneven pattern of the optical component comprises convex sections.

6. The light emitting unit of claim 1 , wherein the optical component is a waveguide.

7. The light emitting unit of claim 1 , further comprises a reflection member on a surface of the optical component that opposes the light emission surface.

8. The light emitting unit of claim 1 , further comprises a scattering agent on the light emission surface.

9. The light emitting unit of claim 8 , wherein the scattering agent is printed on the light emission surface.

10. The light emitting unit of claim 1 , wherein the light emitting unit is a direct type light apparatus.

11. The light emitting unit of claim 1 , wherein the light sources are divided into in a series of light sections that each include plurality of the light sources in which the light sources in the light sections are arrayed at a first predetermined pitch, the first predetermined pitch being different than a second predetermined pitch between at least one of the light sections and an adjacent light section of the light sections.

12. The light emitting unit of claim 11 , wherein a spacing between one of the light sources in at least one of the light sections which is nearest the adjacent light section and one of the light sources in the adjacent light section which is nearest the one light section is larger than the first predetermined pitch.

13. The light emitting unit of claim 12 , wherein the second predetermined pitch is greater than the first predetermined pitch.

14. The light emitting unit of claim 1 , wherein the prevention structure is among a plurality of prevention structures.

15. The light emitting unit of claim 14 , wherein the prevention structures are on the light source substrates.

16. The light emitting unit of claim 15 , wherein the prevention structures have a height at a level great than the light sources.

17. The light emitting unit of claim 1 , wherein the light source substrate is a flexible substrate.

18. The light emitting unit of claim 1 , wherein the light source substrate has a wiring pattern on a glass epoxy substrate.

19. The light emitting unit of claim 1 , wherein the wavelength conversion member is a film.

20. The light emitting unit of claim 1 , wherein the prevention structure is a reflection structure.

Assignees

• Saturn Licensing Llc

Inventors

• Ohkawa Shingo
• Nakamura Tomoharu
• Yonezawa Gen

Classifications

• G02B6/0023

  provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source · CPC title

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• G02B6/0026

  Wavelength selective element, sheet or layer, e.g. filter or grating · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title