The invention relates to the technical field of LED, namely, a structure-improved
white light LED. Positive and negative electrodes of a LED
wafer are respectively led out by leads and extended to be connected with a leading pin or a frame out of a lens shield which shades the
wafer. The invention is characterized in that at least one
wafer is fixed on a cup-shaped groove or platform on a base or the frame. The external surface of the wafer is provided with light permeable and heat insulating medium, wherein, the external surface of the medium or the lens shield is coated with a layer of fluorescent
powder. The invention has the advantages that the fluorescent
powder is separated from the wafer, so as to prevent the fluorescent
powder from blackening caused by
thermal aging and
carbonization, stabilize the
color temperature and lighting strength and improve the
optical efficiency by 16 to 36 percent. After
aging test of 5000 hours, the
luminous flux of the product is more than 90 percent of the original
luminous flux, so that the invention can be used for producing various lamps such as serial LED lamps, LED
signal lamps, LED indicating lamps and LED decorative lamps.