Wide color gamut light-emitting element

Abstract

A light emitting element including a first light emitting diode chip to emit emitting light having a peak wavelength in the range of 350 nm to 420 nm, a second light emitting diode chip separated from the first light emitting diode chip and to emit emitting light having a peak wavelength in the range of 430 nm to 470 nm, a green phosphor formed on the first light emitting diode chip, and a red phosphor formed on the second light emitting diode chip, in which the green phosphor includes a BAM-based green phosphor.

1 . A light emitting element comprising:
 a first light emitting diode chip to emit light having a peak wavelength in the range of 350 nm to 420 nm;   a second light emitting diode chip separated from the first light emitting diode chip and to emit light having a peak wavelength in the range of 430 nm to 470 nm;   a green phosphor formed on the first light emitting diode chip; and   a red phosphor formed on the second light emitting diode chip,   wherein the green phosphor comprises a BAM-based green phosphor.   
     
     
         2 . The light emitting element of  claim 1 , wherein the BAM-based green phosphor comprises a single kind of phosphor. 
     
     
         3 . The light emitting element of  claim 1 , wherein the BAM-based green phosphor comprises at least one of (Ba,Sr,Ca)MgAl 10 O 17 :Mn 2+ ,Eu 2+  and BaMgAl 10 O 17 :Mn 2+ . 
     
     
         4 . The light emitting element of  claim 1 , wherein the red phosphor comprises at least one of a nitride-based red phosphor and a fluoride-based red phosphor. 
     
     
         5 . The light emitting element of  claim 4 , wherein the nitride-based red phosphor comprises at least one of phosphors represented by MSiN 2 , MSiON 2  and M 2 Si 5 N 8 , where M is one of Ca, Sr, Ba, Zn, Mg, and Eu. 
     
     
         6 . The light emitting element of  claim 4 , wherein the fluoride-based red phosphor is a phosphor represented by A 2 MF 6 :Mn 4+ , where A is one of Li, Na, K, Ba, Rb, Cs, Mg, Ca, Se, and Zn, and M is one of Ti, Si, Zr, Sn, and Ge. 
     
     
         7 . The light emitting element of  claim 1 , wherein light emitted from the light emitting element is a combination of light emitted from the first and second light emitting diode chips, light emitted from the green phosphor, and light emitted from the red phosphor. 
     
     
         8 . The light emitting element of  claim 7 , wherein a color gamut of the light has an NTSC value of 100% or more. 
     
     
         9 . The light emitting element of  claim 1 , wherein the red phosphor is formed to covers the green phosphor. 
     
     
         10 . The light emitting element of  claim 1 , wherein the red phosphor is separated from the green phosphor. 
     
     
         11 . The light emitting element of  claim 1 , further comprising a housing having a cavity defined therein,
 wherein the first and second light emitting diode chips are received in the cavity.   
     
     
         12 . The light emitting element of  claim 11 , wherein the housing comprises a plurality of cavities, and the first light emitting diode chip and the second light emitting diode chip are received in different cavities, respectively. 
     
     
         13 . A light emitting element comprising:
 a first light emitting diode chip to emit light having a peak wavelength in the range of 350 nm to 420 nm;   a second light emitting diode chip separated from the first light emitting diode chip and to emit light having a peak wavelength in the range of 430 nm to 470 nm;   a green phosphor formed on the first light emitting diode chip; and   a red phosphor formed on the second light emitting diode chip,   wherein the red phosphor comprises at least one of a nitride-based red phosphor and a fluoride-based red phosphor, the red phosphor covering the green phosphor.   
     
     
         14 . The light emitting element of  claim 13 , further comprising a housing having a cavity defined therein,
 wherein:   the first and second light emitting diode chips are received in the cavity; and   the red phosphor covers the cavity of the housing.   
     
     
         15 . The light emitting element of  claim 13 , wherein light emitted from the light emitting element is a combination of light emitted from the first and second light emitting diode chips, light emitted from the green phosphor, light emitted from the red phosphor, and light emitted from the green and red phosphors. 
     
     
         16 . A light emitting element comprising:
 a first light emitting diode chip to emit light having a peak wavelength in the range of 350 nm to 420 nm;   a second emitting diode chip separated from the first light emitting diode chip and to emit light having a peak wavelength in the range of 430 nm to 47 0 nm;   a green phosphor formed on the first light emitting diode chip; and   a red phosphor formed on the first light emitting diode chip and the second light emitting diode chip,   wherein light emitted from the light emitting element is a combination of light emitted from the first and second light emitting diode chips, light emitted from the green phosphor, light emitted from the red phosphor, and light emitted from the green and red phosphors.   
     
     
         17 . The light emitting element of  claim 16 , wherein:
 the red phosphor comprises at least one of a nitride-based red phosphor and a fluoride-based red phosphor; and   the red phosphor covers the green phosphor.   
     
     
         18 . The light emitting element of  claim 16 , further comprising a housing having a cavity defined therein,
 wherein the first and second light emitting diode chips are received in the cavity and the red phosphor covers the cavity of the housing.