Light emitting diode devices, method of manufacture, uses thereof
First Claim
1. A light emitting diode device comprisinga light emitting diode, anda device component, wherein the device component comprises a polycarbonate composition comprisinga bisphenol A polycarbonate;
- and2,2′
-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one) in an amount effective to provide a composition wherein a molded sample of the composition hasa UL94 rating of V-2 or better at a thickness of 0.9 mm;
an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; and
for a molded sample of the composition having a thickness of 2.5 mm, an increase in yellowness index (Δ
YI) of 12 or less after heat aging at 130°
C. for 5,000, as measured by ASTM D1925,wherein the bisphenol A polycarbonate comprises less than or equal to 150 ppm free hydroxyl groups and less than or equal to 2 ppm sulfur as measured by a Total Sulfur Analysis based on combustion and coulometric detection, and a molded sample of the bisphenol A polycarbonate has;
a yellowness index of 1.5 or less measured by ASTM D1925, and an increase in yellowness index of less than 3 after 2,000 hours of heat aging at 130°
C. as measured by ASTM D 1925.
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Accused Products
Abstract
A light emitting diode lighting device contains a light emitting diode and a lighting device component, wherein the device component comprises a polycarbonate composition comprising a bisphenol A polycarbonate; and 2,2′-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one) in an amount effective to provide a composition wherein a molded sample of the composition has a UL94 rating of V-2 or better at a thickness of 0.9 mm; an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; and an increase in yellowness index (ΔYI) of 12 or less at 2.5 mm thickness after heat aging at 130° C. for 5,000 hours.
175 Citations
35 Claims
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1. A light emitting diode device comprising
a light emitting diode, and a device component, wherein the device component comprises a polycarbonate composition comprising a bisphenol A polycarbonate; - and
2,2′
-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one) in an amount effective to provide a composition wherein a molded sample of the composition hasa UL94 rating of V-2 or better at a thickness of 0.9 mm; an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; and for a molded sample of the composition having a thickness of 2.5 mm, an increase in yellowness index (Δ
YI) of 12 or less after heat aging at 130°
C. for 5,000, as measured by ASTM D1925,wherein the bisphenol A polycarbonate comprises less than or equal to 150 ppm free hydroxyl groups and less than or equal to 2 ppm sulfur as measured by a Total Sulfur Analysis based on combustion and coulometric detection, and a molded sample of the bisphenol A polycarbonate has;
a yellowness index of 1.5 or less measured by ASTM D1925, and an increase in yellowness index of less than 3 after 2,000 hours of heat aging at 130°
C. as measured by ASTM D 1925. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 29, 30)
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27. A process to reduce photodegradation of a component of a device exposed to light comprising a component having a wavelength of 400 nm to 500 nm and a component having a wavelength of 10 nm to 400 nm, the process comprising
molding a polycarbonate composition to form the component of the device, wherein the polycarbonate composition comprises a bisphenol A polycarbonate, and an ultraviolet light absorber in an amount effective to provide a composition wherein a molded sample of the composition has a UL94 rating of V-2 or better at a thickness of 0.9 mm; -
an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; and for a molded sample of the composition having a thickness of 2.5 mm, an increase in yellowness index (Δ
YI) of 12 or less after heat aging at 130°
C. for 5,000 hours, as measured by ASTM D1925; andexposing the component of the device to a light emitting diode excitation/transmission source for a selected period of time, wherein the bisphenol A polycarbonate comprises less than or equal to 150 ppm free hydroxyl groups and less than or equal to 2 ppm sulfur as measured by a Total Sulfur Analysis based on combustion and coulometric detection and a molded sample of the bisphenol A polycarbonate has;
a yellowness index of 2.5 or less measured by ASTM D1925, and an increase in yellowness index of less than 3 after 2,000 hours of heat aging at 130°
C. as measured by ASTM D 1925.
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28. A process to decrease light absorption in the range of 370 to 380 nanometers of a component of a device exposed to light comprising a component having a wavelength of 400 nm to 500 nm and a component having a wavelength of 10 nm to 400 nm, the process comprising
molding a polycarbonate composition to form the component of the device, wherein the polycarbonate composition comprises a bisphenol A polycarbonate, and an ultraviolet light absorber in an amount effective to provide a composition wherein a molded sample of the composition has a UL94 rating of V-2 or better at a thickness of 0.9 mm, an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; - and
for a molded sample of the composition having a thickness of 2.5 mm, an increase in yellowness index (Δ
YI) of 12 or less after heat aging at 130°
C. for 5,000 hours, as measured by ASTM D1925; andexposing the component of the device to a light emitting diode excitation/transmission source for a selected period of time, wherein the bisphenol A polycarbonate comprises less than or equal to 150 ppm free hydroxyl groups and less than or equal to 2 ppm sulfur as measured by a Total Sulfur Analysis based on combustion and coulometric detection, and a molded sample of the bisphenol A polycarbonate has;
a yellowness index of 2.5 or less measured by ASTM D1925, and an increase in yellowness index of less than 3 after 2,000 hours of heat aging at 130°
C. as measured by ASTM D 1925.
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31. A polycarbonate composition comprising a bisphenol A polycarbonate;
- and
2,2′
-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one) in an amount effective to provide a composition, wherein a molded sample of the composition has;a UL94 rating of V-2 or better at a thickness of 0.9 mm;
an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; and
for a molded sample of the composition having a thickness of 2.5 mm, an increase in yellowness index (Δ
YI) of 12 or less after heat aging at 130°
C. for 5,000, as measured by ASTM D1925;wherein the bisphenol A polycarbonate comprises less than or equal to 150 ppm free hydroxyl groups and less than or equal to 2 ppm sulfur as measured by a Total Sulfur Analysis based on combustion and coulometric detection, and a molded sample of the bisphenol A polycarbonate has;
a yellowness index of 1.5 or less measured by ASTM D1925, and an increase in yellowness index of less than 3 after 2,000 hours of heat aging at 130°
C. as measured by ASTM D 1925. - View Dependent Claims (32, 33, 34, 35)
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Specification