WHITE LIGHT-EMITTING LED LAMP, BACKLIGHT USING SAME, AND LIQUID CRYSTAL DISPLAY

摘要

Disclosed is a white LED lamp using an ultraviolet light-emitting LED wherein both high color rendering and high luminance are achieved by improving combination of blue, green and red light-emitting phosphors. Specifically disclosed is a white LED lamp (1) comprising an LED chip (2) having an emission wavelength of not less than 360 nm and not more than 440 nm and a light-emitting unit which contains a phosphor, wherein a blue light-emitting phosphor, a green light-emitting phosphor and a red light-emitting phosphor are combined, and emits white light when excited by light from the LED chip (2). At least one phosphor selected from Eu-activated halophosphate phosphors and Eu-activated aluminate phosphors is used for the blue light-emitting phosphor; an Au- and Al-activated zinc sulfide phosphor is used for the green light-emitting phosphor; and at least one phosphor selected from Eu- and Sm-activated lanthanum oxysulfide phosphors and Cu- and Mn-activated zinc sulfide phosphors is used for the red light-emitting phosphor.