Light emitting device
AssigneeSamsung Electronics Co., Ltd.
InventorsDo-Gyu JUNG, Sung-Woo CHOI, Chul-Soo YOON
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Abstract
A light emitting device including a light emitting element for emitting blue light; and a fluorescent film including a single crystal fluorescent material or a polycrystalline fluorescent material, wherein the fluorescent film absorbs the blue light and emits light having a wavelength different from that of the blue light, wherein the fluorescent film faces a surface of the light emitting element, and the fluorescent material included in the fluorescent film is represented by the following Formula (1): Y3-x-yLxMyAl5O12 wherein L is Gd or Lu, and M is Ce, Tb, Eu, Yb, Pr, Tm, or Sm, 0≤x≤2.999, and 0.001≤y≤0.1.
Claims31
A light emitting device, comprising:
- a light emitting element for emitting blue light;
- and
- a fluorescent film including a single crystal fluorescent material or a polycrystalline fluorescent material,
- wherein the fluorescent film absorbs the blue light and emits light having a wavelength different from that of the blue light,
- wherein the fluorescent film faces a surface of the light emitting element, and the single crystal fluorescent material or polycrystalline fluorescent material included in the fluorescent film is represented by the following Formula (1):
- Y3-x-yLxMyAl5O12
- wherein L is Gd or Lu, and M is Ce, Tb, Eu, Yb, Pr, Tm, or Sm, 0≤x≤2.999, and 0.001≤y≤0.1.
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A light emitting device, comprising:
- a light emitting element for emitting blue light;
- and
- a single crystal fluorescent material, the single crystal fluorescent material including an encapsulant and a single crystal fluorescent powder,
- wherein the single crystal fluorescent material absorbs the blue light and emits light having a wavelength different from that of the blue light, and
- wherein the single crystal fluorescent material faces a surface of the light emitting element, and particles of the single crystal fluorescent powder have a quartile deviation (QD) less than 2.0, and
- wherein particles of the single crystal fluorescent powder are represented by the following Formula (1):
- Y3-x-yLxMyAl5O12
- wherein L is Gd or Lu, and M is Ce, Tb, Eu, Yb, Pr, Tm, or Sm, 0≤x≤2.999, and 0.001≤y≤0.1.
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A light emitting device, comprising:
- a light emitting element for emitting blue light;
- a fluorescent film including a single crystal fluorescent material or a polycrystalline fluorescent material, the fluorescent film contacting an upper surface of the light emitting element, wherein the fluorescent film absorbs the blue light and emits light having a wavelength different from that of the blue light;
- and
- a reflection plate attached on a sidewall of the light emitting element and a sidewall of the fluorescent film,
- wherein the single crystal fluorescent material or polycrystalline fluorescent material included in the fluorescent film is represented by the following Formula (1):
- Y3-x-yLxMyAl5O12
- wherein L is Gd or Lu, and M is Ce, Tb, Eu, Yb, Pr, Tm, or Sm, 0≤x≤2.999, and 0.001≤y≤0.1.
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Dependencies are inferred from the claim text.