摘要:
A white light photoluminescence wavelength conversion component comprises at least one blue light excitable green to yellow light (510 nm to 570 nm) emitting yttrium aluminum garnet (YAG) type phosphor material and at least one blue light excitable orange to red light (585 nm to 670 nm) emitting organic fluorescent dye.
摘要:
A white light illumination system may comprise: a phosphor package; a first radiation source for providing co-excitation radiation to the phosphor package, the source emitting in wavelengths ranging from about 250 nm to about 410 nm; and a second radiation source for providing co-excitation radiation to the phosphor package, the source emitting in wavelengths ranging from about 410 nm to about 540 nm; wherein the phosphor package is configured to emit photoluminescence in wavelengths ranging from about 440 nm to about 700 nm upon co-excitation from the first and second radiation sources, and wherein the phosphor package comprises at least one narrow band green phosphor with a photoluminescence peak with a full width at half maximum of less than 60 nm, and wherein the narrow band green phosphor is configured to emit photoluminescence in wavelengths ranging from about 500 nm to about 550 nm.
摘要:
A method of manufacturing an LED lighting arrangement, comprises: receiving an optical component having a diffusing material that is light diffusive and at least one photoluminescent material that is excitable by light of a first wavelength range and which emits light of a second wavelength range; receiving an LED assembly that is operable to generate the light of the first wavelength range and mounting the optical component to the LED assembly to form the LED lighting arrangement. The optical component having the diffusing and photoluminescent materials is mass produced separately from the LED assembly and can be selected such that light generated by the optical component combined with the light generated by the LED assembly corresponds to light of a selected color. Also disclosed are LED lighting arrangements, components for LED lighting arrangements and methods of fabricating an optical component.
摘要:
A photoluminescent material has the characteristic of a long photoluminescence decay and has the general composition Ca3-x-m-nAxSc2-yMySi3-zEzO12:mCe3+,nMn2+, where A is at least one divalent cation including Sr, Ba or a combination of monovalent and trivalent cations including combinations of Li, Na, K, B, Al and Ga; M is at least one trivalent cation including Al, Ga, or a divalent cation including Mg, E is a combination of a trivalent and a pentavalent cation including B, Al, Ga, N and P, or a combination of monovalent and trivalent cations including Li, Na, K, B, Al, Ga, N and P. The A cation replaces Ca; the M cation replaces Sc, and E replaces Si. This Mn and Ce doped phosphor emits in the yellow to green with a peak at around 510 and/or 560 and 690 nm. The phosphor material has applications in LED illumination systems.
摘要翻译:光致发光材料具有长的光致发光衰变的特征,具有通常的组成为Ca 3-x m-n A x Sc 2-y M y Si 3-z E z O 12:mCe 3 +,nM n 2 +,其中A为包括Sr,Ba或一价和三价阳离子的组合的至少一种二价阳离子 包括Li,Na,K,B,Al和Ga的组合; M是包括Al,Ga或包含Mg的二价阳离子中的至少一种三价阳离子,E是包括B,Al,Ga,N和P的三价阳离子和五价阳离子的组合,或者包括单价和三价阳离子的组合,包括 Li,Na,K,B,Al,Ga,N和P.A阳离子取代Ca; M取代了Sc,E取代了Si。 该Mn和Ce掺杂的荧光体以约510和/或560和690nm的峰发射为黄色至绿色。 荧光体材料在LED照明系统中具有应用。
摘要:
Disclosed herein are green-emitting, garnet-based phosphors having the formula (Lu1-a-b-cYaTbbAc)3(Al1-dBd)5(O1-eCe)12:Ce,Eu, where A is selected from the group consisting of Mg, Sr, Ca, and Ba; B is selected from the group consisting of Ga and In; C is selected from the group consisting of F, Cl, and Br; and 0≦a≦1; 0≦b≦1; 0
摘要:
Disclosed are LED-based lighting arrangements that include an integrated lighting component that includes both a photoluminescence wavelength conversion portion and a diffusing portion. The integrated lighting component can be used to implement low-profile lighting arrangements having very small installation space requirements.
摘要:
Embodiments of the present invention are directed to nitride-based, red-emitting phosphors in red, green, and blue (RGB) lighting systems, which in turn may be used in backlighting displays and warm white-light applications. In particular embodiments, the red-emitting phosphor is based on CaAlSiN3 type compounds activated with divalent europium. In one embodiment, the nitride-based, red emitting compound contains a solid solution of calcium and strontium compounds (Ca,Sr)AlSiN3:Eu2+, wherein the impurity oxygen content is less than about 2 percent by weight. In another embodiment, the (Ca,Sr)AlSiN3:Eu2+ compounds further contains a halogen in an amount ranging from about zero to about 2 atomic percent, where the halogen may be fluorine (F), chlorine (Cl), or any combination thereof. In one embodiment at least half of the halogen is distributed on 2-fold coordinated nitrogen (N2) sites relative to 3-fold coordinated nitrogen (N3) sites.
摘要:
A photoluminescence color display comprises a display panel that displays red, green and blue pixel areas, an excitation source operable to generate excitation radiation for operating the display, and a photoluminescence color-element plate. The color-element plate comprises at least one photoluminescence material, such as a phosphor material or quantum dots, that is operable to emit light corresponding to red, green and blue pixel areas of the display in response to said excitation radiation. Additionally, the photo-luminescence color display comprises a wavelength selective filter that is provided between the color-element plate and the excitation source. The filter has a transmission characteristic that allows the passage of excitation radiation from the excitation source to excite the at least one photoluminescence material whilst preventing the passage of photoluminescence light back to the excitation source thereby prevent cross contamination of light among the different pixel areas of the display.
摘要:
A white light illumination system may comprise: a phosphor package; a first radiation source for providing co-excitation radiation to the phosphor package, the source emitting in wavelengths ranging from about 250 nm to about 410 nm; and a second radiation source for providing co-excitation radiation to the phosphor package, the source emitting in wavelengths ranging from about 410 nm to about 540 nm; wherein the phosphor package is configured to emit photoluminescence in wavelengths ranging from about 440 nm to about 700 nm upon co-excitation from the first and second radiation sources, and wherein the phosphor package comprises at least one narrow band green phosphor with a photoluminescence peak with a full width at half maximum of less than 60 nm, and wherein the narrow band green phosphor is configured to emit photoluminescence in wavelengths ranging from about 500 nm to about 550 nm.