The invention provides an LED
white light source device. The LED
white light source device comprises a heat dissipation substrate, an inner encapsulation layer, a
blue light shielding encapsulation layer, an anti-dazzling layer, a light uniformizing optical structure, red LED chips, a
green LED chip, blue LED chips and a lamp cup; the heat dissipation substrate is arranged on the outer bottom faceof the lamp cup, the red LED chips, the
green LED chip and the blue LED chips are located on the inner bottom face of the lamp cup and are in conductive contact with the heat dissipation substrate, the inner encapsulation layer is arranged on the LED chips, the
blue light shielding encapsulation layer is arranged on the inner encapsulation layer, the anti-dazzling layer is arranged on the
blue light shielding encapsulation layer, and the light uniformizing optical structure is arranged on the anti-dazzling layer; and the shielding rate of the blue light shielding encapsulation layer on lightwith the
wave band below 460 nm is 80% or above, the shielding rate of the blue light shielding encapsulation layer on blue-
violet light with the
wave band ranging from 350 nm to 460 nm ranges from 90% to 98%, and the
light transmission rate of the blue light shielding encapsulation layer on visible light with the
wave band ranging from 470 nm to 750 nm keeps at 85% or above. The white LED illuminating device can reach the blue light shielding rate of 90% or above, can well filter out blue-violet harmful wave band light and emit white soft light, can be widely applied to various LED illuminating, is an innovation for an existing white LED illuminating device and is wide in development prospect.