White light LED, backlight module and manufacturing method of white light LED

The invention provides a white light LED, a backlight module and a manufacturing method of the white light LED. Within a wave band ranging from 410 nanometers to 730 nanometers, the peak wavelength of the penetration rate of a white light penetration spectrum of an optical filter is determined, the peak wavelength corresponding to the maximum in the sum of penetration rates of the white light penetration spectrum within a range from the sum of the peak wavelength minus 20 nanometers to the sum of the peak wavelength plus 20 nanometers is selected as a first peak wavelength, an interval, namely (lambda1-delta1, lambda1+delta2), is determined near the first peak wavelength, first fluorescent powder with the emission wavelength within the interval is selected and added to LED fluorescent glue in a manufacturing process, and therefore luminous flux of light emitted by the white light LED within the wave band (lambda1-delta1, lambda1+delta2) is increased. In addition, the penetration rates, within the wave band (l