发明名称 |
Low-voltage cathode for scrubbing cathodoluminescent layers for field emission displays and method |
摘要 |
The present invention includes a low voltage, high current density, large area cathode for scrubbing of cathodoluminescent layers. The cathodoluminescent layers are formed on a transparent conductive layer fonned on a transparent insulating viewing screen to provide a faceplate. An electrical coupling is formed to the transparent conductive layer to provide a return path for electrons. The faceplate and the cathodoluminescent layers are placed on a conveyer in a vacuum. The cathodoluminescent layers are irradiated with an electron beam having a density of greater than one hundred microamperes/cm2. The electron beam may be provided by a cathode including an insulating base, a first post secured to the insulating base near a first edge of the insulating base and a second post including a spring-loaded tip secured to the insulating base near a second edge of the insulating base. The cathode also includes a first wire cathode having a first end coupled to the first post and a second end coupled to the spring-loaded tip of the second post. The first wire cathode is maintained in a tensioned state by the spring-loaded tip. The electron irradiation scrubs oxygen-bearing species from the cathodoluminescent layer. Significantly, this results in improved emitter life when the faceplate is incorporated in a field emission display. The display including the scrubbed faceplate has significantly enhanced performance and increased useful life compared to displays including faceplates that have not been scrubbed.
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申请公布号 |
US2002014830(A1) |
申请公布日期 |
2002.02.07 |
申请号 |
US20010955631 |
申请日期 |
2001.09.18 |
申请人 |
WATKINS CHARLES M.;DYNKA DANNY |
发明人 |
WATKINS CHARLES M.;DYNKA DANNY |
分类号 |
H01J9/39;(IPC1-7):H01J1/62;H01J9/38;H01J63/04;H01T21/04 |
主分类号 |
H01J9/39 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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