摘要:
The present disclosure provides an illuminating system including a light emitting diode (LED); and a tunable luminescent material disposed approximate the light-emitting diode, wherein the tunable luminescent material includes alkaline earth metal (AE) and silicon aluminum nitride doped by a rare earth element (RE), formulated as (AE)Si6−pAlpN8, wherein p is a parameter defining a relative aluminum content in weight and p is greater than zero.
摘要:
An oxynitride phosphor and a method of manufacturing the same are revealed. The formula of the oxynitride phosphor is Ba3-x-ySi6O12N2:Cey, Eux (0≦x≦1, 0≦y≦1). Europium (Eu) and cerium (Ce) are luminescent centers. The oxynitride phosphor is synthesized by solid-state reaction. The oxynitride phosphor is excited by vacuum ultraviolet light with a wavelength range of 130 nm to 300 nm or ultraviolet to visible light with a wavelength range of 350 nm to 550 nm. The emission wavelength of the oxynitride phosphor is ranging from 400 nm to 700 nm. Thus the oxynitride phosphor can be applied to plasma display panels and ultraviolet (UV) excitation sources. The energy transfer occurs between Ce and Eu of the oxynitride phosphor and the oxynitride phosphor has a blue light emission peak and a green light emission peak. Thus color rendering index of the oxynitride phosphor is improved.
摘要翻译:揭示了氮氧化物荧光体及其制造方法。 氧氮化物荧光体的配方为Ba 3-x-y Si 6 O 12 N 2:Cey,Eux(0≦̸ x≦̸ 1,0& nlE; y≦̸ 1)。 铕(Eu)和铈(Ce)是发光中心。 氧氮化物荧光粉是通过固相反应合成的。 氧氮化物荧光体被激发,其波长范围为130nm至300nm的真空紫外光或波长范围为350nm至550nm的紫外线。 氮氧化物荧光体的发射波长范围为400nm至700nm。 因此,氮氧化物荧光体可以应用于等离子体显示面板和紫外线(UV)激发源。 能量转移发生在氧氮化物荧光体的Ce和Eu之间,氧氮化物荧光体具有蓝色发光峰和绿色发光峰。 因此,氮氧化物荧光体的显色指数提高。
摘要:
A display device and a method of manufacturing the same are provided. The display device includes an illuminate unit and a color filter. The illuminate unit has a light-emitting chip and a plurality of quantum dot phosphors for generating a color light which has an optical spectrum including the first blue peak wavelength, a first green peak wavelength, and a first red peak wavelength. The color filter is disposed in the light path of the color light, wherein the color filter has a transmittance spectrum having a second blue peak wavelength, a second green peak wavelength, and a second red peak wavelength. The first blue peak wavelength, the first green peak wavelength, and the first red peak wavelength respectively match the second blue peak wavelength, the second green peak wavelength, and the second red peak wavelength in order to enhance the color performance of the display device.
摘要:
Disclosed are compositions and synthetic methods of phosphors that can be efficiently excited by blue light. The wavelength of the blue light is between 400 nm to 480 nm. The phosphors contain garnet fluorescent material activated with cerium, which contain Ba, Y, Tb, Lu, Sc, La, Gd, Sm, or combinations thereof, and Al, Ga, In, or combinations thereof. In addition, the phosphors are easily and quickly prepared in a large amount. The phosphors have high thermal stability and high emission intensity, therefore, being high of value in industry for utilization.
摘要:
A light emitting apparatus includes a blue light emitting diode (LED), a first and second phosphor layers. The second phosphor layer is between the blue LED and the first phosphor layer. When a blue beam of a shorter wavelength excites the phosphor layers, the excitation efficiency of the first phosphor layer is greater than that of the second phosphor layer. When a blue beam of a longer wavelength excites the phosphor layers, the excitation efficiency of the first phosphor layer is less than that of the second phosphor layer. Moreover, the wavelength of the peak intensity of the light beam from the first phosphor layer is shorter than that of the second phosphor layer. And, the dividing value between the shorter wavelength and the longer wavelength is within the range from a first wavelength to a second wavelength.
摘要:
The present invention is a yellow-green phosphor material with a high luminescence intensity. The present invention is suitable for excitation by ultraviolet or blue light. The phosphor material is made of a phosphate compound with a chemical formula of LiZn1-xPO4:Mx(0
摘要:
A method for manufacturing metal nano particles having a hollow structure is provided. First, a suitable reducing agent is added into a first metal salt solution, and first metal ions are reduced to form first metal nano particles. Next, after the reducing agent is decomposed, a second metal salt solution with a higher reduction potential than that of the first metal is added. Then, the first metal particles are oxidized to form first metal ions when the second metal ions are reduced on the surface of the first metal by electrochemical oxidation reduction reaction, and thus, second metal nano particles having a hollow structure and a larger surface area are obtained. The method is simple and the metal nano particles with uniform particle size are obtained by this method.
摘要:
The present invention is a yellow-green phosphor material with a high luminescence intensity. The present invention is suitable for excitation by ultraviolet or blue light. The phosphor material is made of a phosphate compound with a chemical formula of LiZn1-xPO4:Mx (0
摘要翻译:本发明是发光强度高的黄绿色荧光体材料。 本发明适用于通过紫外线或蓝光的激发。 磷光体材料由化学式为LiZn 1-x PO 4 x(x
摘要:
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.
摘要:
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.