Generator of white-light surface light source

An illumination device using white light as illumination source includes a semi-conducting chip, base and lens with cavum filled in photo-transmission material. The lens are fixed on the chip top and separated with the chip. By using lens it could effectively reduce excitation wavelength excursion, quanta efficiency decrease and aging raised by chip heat radiation. The illuminating rate, color temperature, chroma and coincidence of illumination device are improved.