Abstract: A semiconductor white light source includes a blue emitting semiconductor; a dispersant material disposed about the blue emitting semiconductor; an ultraviolet emitting semiconductor; and a wavelength shifting medium with maximum excitation in the ultraviolet spectrum disposed about the dispersant material and the ultraviolet emitting semiconductor such that ultraviolet light output by the ultraviolet emitting semiconductor illuminates the wavelength shifting medium directly and blue light output by the blue emitting semiconductor illuminates the wavelength shifting medium after passage of the blue light through the dispersant material. The dispersant material and the wavelength shifting medium are separate materials. The blue emitting semiconductor and the ultraviolet emitting semiconductor are arranged to emit light into a common illumination field.

Abstract: Semiconductor white light sources presented herein include special combinations of a blue source and a yellow source where these light fields are substantially overlapped. The source of blue light includes a blue emitting semiconductor operating in a conventional manner. However, this blue light source is combined with a special yellow light source and the light produced by each is mixed together. The yellow light source is primarily comprised of a high output ultraviolet emitting semiconductor coupled to a wavelength shifting medium whereby the semiconductor pumps the wavelength shifting medium causing re-emission at longer wavelengths; namely those corresponding to yellow colored light. These two sources operating in conjunction with each other operate to produce higher outputs than those attainable in competitive white light semiconductor systems. In special versions, provision is made whereby the color coordinates may be tuned by a variable current applied to the blue emitting semiconductor.

Abstract: New Peltier semiconductor heat transfer systems are presented herein. In particular, Peltier heat transfer systems of Peltier semiconductor elements of highly unique shapes are arranged to bias the cooling side with respect to its size and consequently performance. In effect, a Peltier heat transfer system is created whereby the Peltier called side is greatly reduced in size and the Peltier hot side is greatly expanded in size. Such ‘high aspect ratio’ Peltier systems promote ‘focused’ cooling effect, which is particularly useful in conjunction with high-performance electronic devices having a small footprint. The entire cooling fact of the Peltier device is brought to the small space approximated by a point. Thus a ‘point’ heat source such as a semiconductor laser are high-performance light emitting diode is more effectively cooled by these systems.