LED LIGHTING APPARATUS HAVING IMPROVED COLOR RENDERING, AND LED FILAMENT

• Main Authors: SONG, Jun Myung, LEE, Jong Kook, LEE, Seong Jin
• Format: Patent
• Language: English; French; German
• Published: 12.06.2024
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; BLASTING; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; PAINTS; POLISHES; SEMICONDUCTOR DEVICES; WEAPONS

A lighting apparatus and an LED filament are disclosed. The lighting apparatus according to one embodiment includes: a light emitting diode chip emitting blue light; a green phosphor having an emission peak in a range of 500 nm to 550 nm; and a red phosphor having an emission peak in a range of 600 nm to 650nm, wherein the red phosphor includes: a first red phosphor having an emission peak in a range of 620 nm to 630 nm; and a second red phosphor having an emission peak in a range of 630 nm to 640 nm, wherein full widths at half maximum of the first red phosphor and the second red phosphor are in a range of 20 nm to 60 nm, respectively. By using the red phosphors having full widths at half maximum in limited ranges together, color rendering of the lighting apparatus may be improved and an amount of phosphors used may be reduced.