A method for manufacturing a white light source provides an LED light source and a semiconductor-type phosphor with S being the host with foreign ions added thereto as luminescence centers. The multi-layer overlay preferably comprises at least one structural layer composed of a polymeric material that is compatible with one or more of the polymeric structural layer of the multi-layer tank. Further provided is a radiant heating system having the composition. If the position indicated by the image pickup position information is spaced apart from the position indicated by the preceding image pickup position information by a predetermined distance, the change point detector detects the current position as a change point. The substrate is formed of an ethylenevinyl acetate copolymer having a vinyl acetate content of 10% by mass or less. Therefore, even though the application program is executed in full screen mode, the working frequency of the graphic chip can still be adjusted according to requirements in any time, which is convenient for the user.