Importance

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Abstract

An improved white LED device comprises at least one first LED component, at least one second LED component, and at least one translucent member. The first LED component emits a blue light having a peak wavelength of 440-470 nm; the second LED component emits a red light having the peak wavelength of 600-630 nm; and the translucent member contains at least one fluorescent substance scattered throughout the translucent member. The fluorescent substance is able to absorb some of the blue light, and emits yellow green light having the peak wavelength of 500-570 nm, wherein when the blue light and yellow green light are mixed, the CIE 1931 chromaticity diagram is represented by a polygon with color coordinates (0.20,0.50), (0.20,0.30), (0.29,0.30), and (0.40,0.50), furthermore, after mixing the red light, the blue light, and the yellow green light, the improved white LED device emits a white light with high color rendering, and a color temperature of the white light ranges between 2500-7000 K.

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First Claim