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公开(公告)号：US20030219599A1
公开(公告)日：2003-11-27
申请号：US10458624
申请日：2003-06-11
发明人： Wounjhang Park , Kazuhito Yasuda , Brent K. Wagner , Christopher J. Summers , Youngrag Do , Hong Guen Yang
IPC分类号： B05D003/02
CPC分类号： C09K11/584 , C09K11/025 , Y10T428/2991
摘要： The present invention provides surface coated phosphors useful in field emission displays and vacuum fluorescent displays. The surface coated phosphor comprises a thin coating of rare earth oxide, e.g., yttrium oxide, disposed on an uncoated phosphor such as a sulfide phosphor. The present invention further provides a process for preparing a surface coated phosphor comprising contacting the uncoated phosphor with a rare earth hydroxide gel solution to obtain a rare earth hydroxide gel coated phosphor, drying the gel coated phosphor to remove solvent residues, and heat treating the dried rare earth hydroxide gel coated phosphor. The surface coated phosphors of the present invention have improved cathodoluminescence efficiency, coulombic aging resistance, chemical, and/or oxidative stability.
摘要翻译： 本发明提供可用于场致发射显示器和真空荧光显示器的表面涂覆荧光粉。 表面涂覆的荧光体包括设置在未涂覆的荧光体如硫化物荧光体上的稀土氧化物例如氧化钇的薄涂层。 本发明还提供了一种制备表面被覆荧光体的方法，包括使未涂覆的荧光体与稀土氢氧化物凝胶溶液接触以获得稀土氢氧化物凝胶涂覆的荧光体，干燥凝胶涂覆的磷光体以除去溶剂残余物，并将干燥的 稀土氢氧化物凝胶涂层荧光粉。 本发明的表面被覆荧光体具有改进的阴极发光效率，库仑抗老化性，化学稳定性和/或氧化稳定性。
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公开(公告)号：US20040166318A1
公开(公告)日：2004-08-26
申请号：US10784093
申请日：2004-02-20
发明人： Wounjhang Park , Kazuhito Yasuda , Brent K. Wagner , Christopher J. Summers , Youngrag Do , Hong Guen Yang
IPC分类号： B32B023/02
CPC分类号： C09K11/584 , C09K11/025 , Y10T428/2991
摘要： The present invention provides surface coated phosphors useful in field emission displays and vacuum fluorescent displays. The surface coated phosphor comprises a thin coating of rare earth oxide, e.g., yttrium oxide, disposed on an uncoated phosphor such as a sulfide phosphor. The present invention further provides a process for preparing a surface coated phosphor comprising contacting the uncoated phosphor with a rare earth hydroxide gel solution to obtain a rare earth hydroxide gel coated phosphor, drying the gel coated phosphor to remove solvent residues, and heat treating the dried rare earth hydroxide gel coated phosphor. The surface coated phosphors of the present invention have improved cathodoluminescence efficiency, coulombic aging resistance, chemical, and/or oxidative stability.
摘要翻译： 本发明提供可用于场致发射显示器和真空荧光显示器的表面涂覆荧光粉。 表面涂覆的荧光体包括设置在未涂覆的荧光体如硫化物荧光体上的稀土氧化物例如氧化钇的薄涂层。 本发明还提供了一种制备表面被覆荧光体的方法，包括使未涂覆的荧光体与稀土氢氧化物凝胶溶液接触以获得稀土氢氧化物凝胶涂覆的荧光体，干燥凝胶涂覆的磷光体以除去溶剂残余物，并将干燥的 稀土氢氧化物凝胶涂层荧光粉。 本发明的表面被覆荧光体具有改进的阴极发光效率，库仑抗老化性，化学稳定性和/或氧化稳定性。
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公开(公告)号：US20030089889A1
公开(公告)日：2003-05-15
申请号：US09987697
申请日：2001-11-15
IPC分类号： C09K011/08
CPC分类号： C09K11/7706
摘要： A method of producing two visible light photons from an oxide-based phosphor doped with praseodymium (Pr) and including atoms of at least one activator in response to excitation with a single ultraviolet light photon. The method includes exciting the Pr of the oxide-based phosphor with a photon of ultraviolet light to excite an electron to an excited state, the excited electron falling to a lower energy state in a non-radiative transition and transferring energy to excite a first activator atom in the oxide-based phosphor, the first activator atom emitting a first photon of visible light, and the excited electron falling further to a lower energy state in a non-radiative transition, transferring energy to excite a second activator atom in the oxide-based phosphor, the second activator atom emitting a second photon of visible light. An oxide-based phosphor doped with praseodymium includes atoms of at least one activator and emitting two visible light photons in response to excitation by a single ultraviolet light photon.
摘要翻译： 从掺杂有镨（Pr）的氧化物基荧光体产生两个可见光光子并且响应于用单个紫外光光子的激发而包括至少一个激活剂的原子的方法。 该方法包括用紫外光的光子激发氧化物基荧光体的Pr，以将电子激发到激发态，激发的电子在非辐射跃迁中下降到较低的能量状态，并转移能量以激发第一激活剂 所述第一活化剂原子发射可见光的第一光子，并且所述激发的电子在非辐射跃迁中进一步进入较低能态，转移能量以激发氧化物基荧光体中的第二激活原子， 所述第二活化剂原子发射可见光的第二光子。 掺杂有镨的基于氧化物的荧光体包括至少一种活化剂的原子，并响应于单个紫外光光子的激发而发射两个可见光光子。
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公开(公告)号：US20020119247A1
公开(公告)日：2002-08-29
申请号：US10134502
申请日：2002-04-30
发明人： Wounjhang Park , Kazuhito Yasuda , Brent K. Wagner , Christopher J. Summers , Youngrag Do , Hong Guen Yang
IPC分类号： B05D007/00 , B05D003/02
CPC分类号： C09K11/584 , C09K11/025 , Y10T428/2991
摘要： The present invention provides surface coated phosphors useful in field emission displays and vacuum fluorescent displays. The surface coated phosphor comprises a thin coating of rare earth oxide, e.g., yttrium oxide, disposed on an uncoated phosphor such as a sulfide phosphor. The present invention further provides a process for preparing a surface coated phosphor comprising contacting the uncoated phosphor with a rare earth hydroxide gel solution to obtain a rare earth hydroxide gel coated phosphor, drying the gel coated phosphor to remove solvent residues, and heat treating the dried rare earth hydroxide gel coated phosphor. The surface coated phosphors of the present invention have improved cathodoluminescence efficiency, coulombic aging resistance, chemical, and/or oxidative stability.
摘要翻译： 本发明提供可用于场致发射显示器和真空荧光显示器的表面涂覆荧光粉。 表面涂覆的荧光体包括设置在未涂覆的荧光体如硫化物荧光体上的稀土氧化物例如氧化钇的薄涂层。 本发明还提供了一种制备表面被覆荧光体的方法，包括使未涂覆的荧光体与稀土氢氧化物凝胶溶液接触以获得稀土氢氧化物凝胶涂覆的荧光体，干燥凝胶涂覆的磷光体以除去溶剂残余物，并将干燥的 稀土氢氧化物凝胶涂层荧光粉。 本发明的表面被覆荧光体具有改进的阴极发光效率，库仑抗老化性，化学稳定性和/或氧化稳定性。
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