TREA

LIGHT EMITTING DEVICE

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Information

  • Patent Application
  • 20230299244
  • Publication Number
    20230299244
  • Date Filed
    May 23, 2023
    a year ago
  • Date Published
    September 21, 2023
    a year ago
Information
Abstract
A light emitting device includes a light emitting element adapted to emit blue light, quantum dots that absorb part of the blue light emitted from the light emitting element to emit green light, and at least one of a KSF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light and a MGF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light.
Description
Claims
  • 1. A light emitting device, comprising: a light emitting element;a light guide plate in which light from the light emitting element enters; anda sheet-shaped or film-shaped light-transmissive material disposed facing an upper surface of the light guide plate and including green quantum dots adapted to absorb a portion of blue light emitted from the light emitting element to emit green light.
  • 2. The light emitting device according to claim 1, wherein the light-transmissive material is organic polymers.
  • 3. The light emitting device according to claim 1, wherein the light-transmissive material is polymethyl methacrylate resin.
  • 4. The light emitting device according to claim 1, wherein the green quantum dots emit green light having a wavelength of a emission peak of 510 to 560 nm.
  • 5. The light emitting device according to claim 1, wherein the green quantum dots have a half-width of an emission peak of 40 nm or less.
  • 6. The light emitting device according to claim 1, wherein the green quantum dots have a particle size of 1 to 20 nm.
  • 7. The light emitting device according to claim 1, wherein a reflecting plate is placed on a lower side of the light guide plate.
  • 8. The light emitting device according to claim 1, wherein the light-transmissive material is in contact with the light guide plate.
  • 9. The light emitting device according to claim 1, wherein the light-transmissive material is spaced apart from the light guide plate.
  • 10. A liquid crystal display device, comprising: the light emitting device according to claim 1; and a liquid crystal cell.
Priority Claims (1)
Number Date Country Kind
2014-193509 Sep 2014 JP national
Continuations (3)
Number Date Country
Parent 16854791 Apr 2020 US
Child 18322195 US
Parent 16059709 Aug 2018 US
Child 16854791 US
Parent 14859980 Sep 2015 US
Child 16059709 US