LED ENCAPSULANT COMPRISING RARE EARTH METAL OXIDE PARTICLES
The present invention relates to an LED encapsulant including rare-earth metal oxide particles and, more particularly, to an LED encapsulant including a compound represented by Chemical Formula 1 below in a polymer resin. M a (OH) b (CO 3 ) c O d [Chemical Formula 1] In Chemical Formula 1, M is Sc, Y, La, Al, Lu, Ga, Zn, V, Zr, Ca, Sr, Ba, Sn, Mn, Bi or Ac, a is 1 or 2, b is 0 to 2, c is 0 to 3, and d is 0 to 3, wherein b, c, and d are not simultaneously zero, and b and c are either simultaneously zero or simultaneously not zero.
1 . An LED (Light-Emitting Diode) encapsulant, comprising a compound represented by Chemical Formula 1 below in a polymer resin.
M a (OH) b (CO 3 ) c O d [Chemical Formula 1]
wherein M is Sc, Y, La, Al, Lu, Ga, Zn, V, Zr, Ca, Sr, Ba, Sn, Mn, Bi or Ac,
a is 1 or 2,
b is 0 to 2,
c is 0 to 3, and
d is 0 to 3,
wherein b, c, and d are not simultaneously zero, and b and c are either simultaneously zero or simultaneously not zero.
2 . The LED encapsulant of claim 1 , wherein the compound represented by Chemical Formula 1 is Y(OH)CO 3 .
3 . The LED encapsulant of claim 1 , wherein the compound represented by Chemical Formula 1 is Y 2 O 3 .
4 . The LED encapsulant of claim 1 , wherein the compound represented by Chemical Formula 1 has a refractive index ranging from 1.6 to 2.3.
5 . The LED encapsulant of claim 1 , wherein the polymer resin is least one selected from the group consisting of a silicone-based resin, a phenol-based resin, an acrylic resin, polystyrene, polyurethane, a benzoguanamine resin, and an epoxy-based resin.
6 . The LED encapsulant of claim 1 , further comprising phosphor particles.