Abstract: The present invention discloses a low voltage electron excited white lighting device, which comprises a low voltage exciting source and at least two fluorescent substances exhibiting yellow and blue luminous colors after excited by the low voltage exciting source. The host lattice of at least two fluorescent substances is composed of alkaline earth metal and aluminium oxide, and the host lattice is further doped with activator. Furthermore, the fluorescent substance(s) exhibiting yellow luminous color is (Y3-xCex)Al5O12 (0.0001×0.5), and the one(s) exhibiting blue luminous color is (Ba1-xEux)MgAl10O17 (0.0001×0.5). By mixing generated yellow and blue lights, white light is then obtained. Besides, (Y3-xCex)Al5O12 (0.0001×0.5) further absorbs a part of the blue ray emitted from (Ba1-xEux)MgAl10O17 (0.0001×0.5), to thereby emit yellow ray, such that more stronger white light can be obtained. This invention has advantages of forming saturated colors, high reliability, etc.

Abstract: A white light-emitting device has a semiconductor light-emitting chip, configured to emit light and at least one (Ba1?xMx)Al2O4 phosphor to absorb the light emitted from the semiconductor light-emitting chip to emit a white light, where M is consisted of at least one of Eu, Bi, Mn, Ce, Tb, Gd, La, Mg and Sr, 1>x>0.

Abstract: The present invention describes an apparatus and method for manufacturing a white light-emitting diode (LED) using a powder with characteristics of fluorescence to achieve a high-luminosity white LED. The LED emitting ultraviolet light is used as an excitation source, which excites a first powder with blue-green light, and a second powder with orange light. After that, a white light is produced by blending blue-green and orange light with the principle of complementary colors. For achieving the high-luminosity white LED, the invention adopts a suitable LED to be the excitation source with a suitable blending proportion. On the other hand, the implementation of the fluorescent powder with blue-green light can be modulated using a metal ion in the host lattice to change the ligard field of the crystal.

Abstract: A white light-emitting device has a semiconductor light-emitting chip, a blue-green phosphor and a red phosphor for emitting blue-green light and red light, respectively. The blue-green phosphor and the red phosphor absorb light emitted from the semiconductor light-emitting chip to excite blue-green light and red light that are mixed into white light with improved illumination efficiency, and a high color-rendering property. The white light-emitting device is cheaply and simply manufactured.

Abstract: A white light-emitting device has a semiconductor light-emitting chip, configured to emit light and at least one (Ba1-xMx)Al2O4 phosphor to absorb the light emitted from the semiconductor light-emitting chip to emit a white light, where M is consisted of at least one of Eu, Bi, Mn, Ce, Tb, Gd, La, Mg and Sr, 1>x>0.

Abstract: A white light-emitting device comprising a blue-violet or blue LED and a phosphor material capable of emitting a yellow-green to orange-yellow light upon excitation by the light emitted by the LED. The light from the LED and the phosphor material are mixed in an appropriate ratio to produce a white light. The phosphor material has a general formula (YxMyCez)Al5O12, where x+y=3, x, y?0, 0.5>z>0, and M is selected from the group consisting of Tb, Lu, and Yb, with (YxMy)Al5O12 serving as a host and Ce as an activator. By changing the composition of the metal elements in the host, the crystal field is modulated to thereby alter the energy level of the excited state to which the activator is transferred upon irradiation by a specific wavelength of light, leading to the change in the emitting wavelength of the phosphor material.

Abstract: A yellow phosphor material has a host with a formula (TbxMyCez)Al5O12, wherein x+y+z=3 , 3>x>0 and y?0 and a Ce activator. M is selected from the group consisting of Sc, Y, Dy, Ho, Er, Tm, Yb, and Lu. By changing the diameter of metal ions, the crystal field thereof may be modulated to thereby alter the energy level of the excited state to which the activator is transferred upon irradiation by a specific wavelength of light. The phosphor can be used with a blue LED to form a white light source.

Abstract: A white light-emitting device comprising a blue or blue-green light-emitting diode emitting light of 450-500 nm wavelength, and two phosphor materials capable of emitting a yellow light with 520 to 580 nm wavelength, and a red light with 580 to 640 nm wavelength, respectively. The light-emitting diode and the two phosphor materials are packaged together to form the white light-emitting device.

Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.

Abstract: A method for manufacturing white light source includes the steps of providing an ultra-violet light as radiation source; and preparing two kinds of phosphors each receiving the ultra-violet light and emitting light of different wavelength. One phosphor is designated to emit light covering two wavelength regimes of three primitive colors, i.e., red light (585-640 nm), green light (500-570 nm) and blue light (430-490 nm), and another phosphor is designated to emit light covering remaining wavelength regime of the three primitive colors. The phosphors are mixed in predetermined ratio such that the lights of different wavelength are combined to provide a white light.

Abstract: A fluorescent material with formula(YxMyCez)Al5O12, where x+y=3, x, y≠0, 0<z<0.5, M is selected from the group consisting of Tb, Lu, and Yb. The fluorescent material has a host (YxMy)Al5O12 and an activator: Ce. By changing the composition of metals in the host, the crystal field thereof can be modulated, thereby altering the interaction force between the activator and the other components, and changing the wavelength of emitted colors. The present invention provides a white light-emitting device comprising a light emitting diode and above-mentioned fluorescent powder. The LED emits purple-blue or blue light having a domination wavelength AD range from 430 nm to 500 nm. The fluorescent powder is excited by the purple-blue or blue light emitted from the LED to generate green-yellow light to orange-yellow light having a wavelength range from 560 nm to 590 nm and mixed with the light of LED to form white light.

Abstract: A fluorescent material with formula(YxMyCez)Al5O12, where x+y=3, x, y≠0, 0<z<0.5, M is selected from the group consisting of Tb, Lu, and Yb. The fluorescent material has a host (YxMy)Al5O12 and an activator: Ce. By changing the composition of metals in the host, the crystal field thereof can be modulated, thereby altering the interaction force between the activator and the other components, and changing the wavelength of emitted colors. The present invention provides a white light-emitting device comprising a light emitting diode and above-mentioned. fluorescent powder. The LED emits purple-blue or blue light having a domination wavelength &lgr;D range from 430 nm to 500 nm. The fluorescent powder is excited by the purple-blue or blue. light emitted from-the LED to generate green-yellow light to orange-yellow light having a wavelength range from 560 nm to 590 nm and mixed with the light of LED to form white light.

Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.

Abstract: A method for manufacturing a white light source provides an LED light source and a semiconductor-type phosphor with (Zn, Cd)S being the host with foreign ions added thereto as luminescence centers. The LED light source emits light ranging from 495 nm about (blue-green light) to about 340 nm (ultra-violet).

Abstract: A method for manufacturing a white light source includes steps of providing an ultra-violet light as a radiation source, preparing three kinds of first phosphors each receiving the ultra-violet light and emitting the light of red, green and blue, respectively, and preparing at least one additional second phosphor to modify a spectral property of the light emitted by the three first phosphors in order to improve the brightness and color rendering property of the white light source. Moreover, at least one phosphor with the fluorescent property is used as the above second phosphor powder to obtain a color-changeable light source.

Abstract: An Oxide Precursor Powder from the Pb—Bi—Sr—Ca—Cu—O 2223 System can be produced by heat treating powder, produced using the Spray Pyrolysis Process as described in: GB2210605 or EP0681989 between 700° C. and 850° C. in an atmosphere containing between 0.1% and 21% O2. Heat Treatment of the pyrolysis powder under controlled conditions produces a powder with a particular phase composition, that is highly homogeneous and has a small particle size distribution, that is inherently more reactive than powders heat treated in the same way but produced using other processes.

Abstract: An SiO2/Al2O3 composite abrasive is disclosed, which has positive surface charges when dispersed in an alkaline water solution. This SiO2/Al2O3 composite abrasive includes an Al2O3 core and SiO2 coated thereon. The abrasive of the present invention is suitable for polishing metal, compact disks, optical lenses, and semiconductors etc in a high-pH environment. A method for producing the SiO2/Al2O3 composite abrasive is also disclosed in the present invention.

Abstract: A manufacturing method for white light source utilizes an ultraviolet light source and suitable phosphors. One of the phosphors is directly excited by the ultraviolet light source and generates a radiation with longer wavelength. Other phosphors are excited by the radiation with longer wavelength and generate radiation with much longer wavelength. The lights generated by those phosphors are mixed to form a white light.

Abstract: A light emitting diode and a method for making the same are proposed. The LED comprises an inorganic phosphor, a silicon compound and an organic glue. The silicon compound has one side being completely or partially C1-C6 alkyl oxide reacted with the inorganic phosphor to modify the surface property of the inorganic phosphor and another side being a functional group selected from a group consisting of epoxy, C1-C6 alkyl, phenyl, amino. The inorganic phosphor with modified surface property can be uniformly mixed in the glue and less deposition is produced.

Abstract: A light emitting diode and a method for making the same are proposed. The LED comprises an inorganic phosphor, a silicon compound and an organic glue. The silicon compound has one side being completely or partially C1-C6 alkyl oxide reacted with the inorganic phosphor to modify the surface property of the inorganic phosphor and another side being a functional group selected from a group consisting of epoxy, C1-C6 alkyl, phenyl, amino. The inorganic phosphor with modified surface property can be uniformly mixed in the glue and less deposition is produced.