Provided are an electron beam curable resin composition including polymethylpentene, and a crosslinking agent, in which the crosslinking agent has a saturated or unsaturated ring structure, at least one atom among atoms forming at least one ring is bonded to any allylic substituent of an allyl group, a methallyl group, an allyl group through a linking group, and a methallyl group through a linking group, and a molecular weight is 1,000 or less, a resin frame for reflectors using the resin composition, a reflector, and a molding method using the resin composition.

A wavelength converter comprises: phosphor particles; and a matrix that is located between the phosphor particles and comprises zinc oxide crystallites. Pores are included in at least one of the zinc oxide crystallites.

Disclosed herein is a light emitting diode. The light emitting diode includes: a light emitting diode chip; a first molding portion covering the light emitting diode chip and having a first index of refraction; a second molding portion covering the first molding portion and having a second index of refraction, wherein the second index of refraction is not higher than the first index of refraction. The light emitting diode chip is covered by a molding portion having a high index of refraction and a molding portion having a low index of refraction and covering the molding portion having a high index of refraction in order to reduce total reflection in the molding portions through reduction in difference in index of refraction between external air and the molding portion having a high index of refraction, thereby improving quantity of light.

Disclosed herein is a light emitting device, comprising: a lighting element located in a housing, wherein the housing is formed from a plastic composition comprising: a conversion material, and a polycarbonate composition comprising: a flame retardant comprising a sulfonate salt and three polycarbonates. The first polycarbonate has a branching level of greater than or equal to 2%, a weight average molecular weight of 20,000 g/mole to 55,000 g/mole and a peak melt viscosity of greater than or equal to 25,000 poise. The second polycarbonate has a glass transition temperature greater than or equal to 170 C. The third polycarbonate has a branching level of 0 to less than 2% and a molecular weight of 17,000 to 40,000 g/mol.

Coated beads made of a primary matrix material and containing a population of quantum dot nanoparticles. Each bead has a multi-layer surface coating. The layers can be two or more distinct surface coating materials. The surface coating materials may be inorganic materials and/or polymeric materials. A method of preparing such particles is also described. The coated beads are useful for composite materials for applications such as light-emitting devices.

There is herein described a composite ceramic wavelength converter having a first phase of an -SiAlON:Eu phosphor and a second phase of a -SiAlON:Eu phosphor. The converter may be used in a phosphor-converted light emitting diode to form a light source having a correlated color temperature (CCT) from 2000K to 4500K.

A solution for packaging an optoelectronic device using an ultraviolet transparent polymer is provided. The ultraviolet transparent polymer material can be placed adjacent to the optoelectronic device and/or a device package on which the optoelectronic device is mounted. Subsequently, the ultraviolet transparent polymer material can be processed to cause the ultraviolet transparent polymer material to adhere to the optoelectronic device and/or the device package. The ultraviolet transparent polymer can be adhered in a manner that protects the optoelectronic device from the ambient environment.

The present invention relates to an Mn.sup.4|-activated complex fluoride phosphor with improved moisture resistance due to modification of the particle surface, and a light emitting element and light emitting device having excellent color rendering properties and stability due to the use of this phosphor.

The phosphor of the present invention is characterized in that it is represented by the general formula: A.sub.2MF.sub.6:Mn.sup.4, wherein element A is an alkali metal element comprising at least K, element M is one or more metal elements chosen from among Si, Ge, Sn, Ti, Zr and Hf, F is fluorine, and Mn is manganese, wherein the phosphor comprises a Ca-containing compound on a particle surface.

The present invention relates to an Mn.sup.4+-activated complex fluoride phosphor with improved moisture resistance due to modification of the particle surface, and a light emitting element and light emitting device having excellent color rendering properties and stability due to the use of this phosphor.

The phosphor of the present invention is characterized in that it is represented by the general formula: A.sub.2MF.sub.6:Mn.sup.4+, wherein element A is an alkali metal element comprising at least K, element M is one or more metal elements chosen from among Si, Ge, Sn, Ti, Zr and Hf, F is fluorine, and Mn is manganese, wherein the phosphor comprises Ca in a concentration range of at least 20 ppm and at most 10,000 ppm or Cl in a concentration range of at least 20 ppm and at most 300 ppm.

A light-emitting device includes a conversion element including a light-emitting surface provided with a conversion layer, wherein the conversion layer contains a matrix material and a converter material, both the matrix material and the converter material are materials that can be vaporized under high vacuum, the matrix material and the converter material are applied to the light-emitting surface by vaporization under a high vacuum, and the matrix material has the structural formula

##STR00001##

where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and X may be mutually independently selected from the group comprising F, Cl and H, and n>=2.