Electric lamp and discharge devices – Discharge devices having a thermionic or emissive cathode
Patent
1997-10-16
1999-09-21
Patel, Vip
Electric lamp and discharge devices
Discharge devices having a thermionic or emissive cathode
313422, 313495, H01J 105
Patent
active
059558288
ABSTRACT:
A thermionic optical emission device employs a two dimensional array of thermionic elements to excite a display material, such as a phosphor coating, thus producing the image viewed by an observer. Each pixel of the desired display corresponds to the electron emissions of thermionic elements. Each pixel may correspond to less than 1 or more than 1000 thermionic elements. In color displays, each pixel of the desired display includes an area of red phosphor, blue phosphor, and green phosphor. Each of the thermionic elements included in the thermionic optical emission device includes a substrate, a conductive material formed on the substrate and forming electrically isolated segments, a cathode formed adjacent to the conductive material and electrically coupling the isolated segments and emitting electrons when heated, a void adjacent the cathode to reduce heat dissipation, a luminescent material disposed on a screen to receive and react to electrons emitted by the cathode and thereby produce an optical emission, and a vacuum separating the cathode and the luminescent material. The thermionic optical emission device can be embodied as a diode, triode, or higher electrode device.
REFERENCES:
patent: 3665241 (1972-05-01), Spindt et al.
patent: 3701919 (1972-10-01), Geppert
patent: 3748522 (1973-07-01), Geppert
patent: 3755704 (1973-08-01), Spindt et al.
patent: 3824478 (1974-07-01), Mueller
patent: 3970887 (1976-07-01), Smith et al.
patent: 3978364 (1976-08-01), Dimeff et al.
patent: 3983442 (1976-09-01), Jariwala et al.
patent: 4019081 (1977-04-01), Buxbaum et al.
patent: 4020381 (1977-04-01), Oess et al.
patent: 4163949 (1979-08-01), Shelton
patent: 4298814 (1981-11-01), Takanashi et al.
patent: 4356427 (1982-10-01), Noguchi et al.
patent: 4429250 (1984-01-01), Clerc et al.
patent: 4513308 (1985-04-01), Greene et al.
patent: 4618801 (1986-10-01), Kakino
patent: 4658181 (1987-04-01), Cooper et al.
patent: 4683399 (1987-07-01), Soclof
patent: 4712039 (1987-12-01), Hong
patent: 4721885 (1988-01-01), Brodie
patent: 4780684 (1988-10-01), Kosmahl
patent: 4855636 (1989-08-01), Busta et al.
patent: 4924137 (1990-05-01), Watanabe et al.
patent: 4983878 (1991-01-01), Lee et al.
patent: 4987377 (1991-01-01), Gray et al.
patent: 5007873 (1991-04-01), Goronkin et al.
patent: 5030879 (1991-07-01), Derks
patent: 5038070 (1991-08-01), Bardai et al.
patent: 5053673 (1991-10-01), Tomii et al.
patent: 5118983 (1992-06-01), Morita et al.
patent: 5173634 (1992-12-01), Kane
patent: 5181874 (1993-01-01), Sokolich et al.
patent: 5199918 (1993-04-01), Kumar
patent: 5203731 (1993-04-01), Zimmerman
patent: 5216324 (1993-06-01), Curtin
patent: 5220238 (1993-06-01), Lee
patent: 5259799 (1993-11-01), Doan et al.
patent: 5285131 (1994-02-01), Muller et al.
patent: 5289078 (1994-02-01), Kitao et al.
patent: 5381069 (1995-01-01), Itoh et al.
patent: 5397957 (1995-03-01), Zimmerman
patent: 5399238 (1995-03-01), Kumar
patent: 5411426 (1995-05-01), Boysel
patent: 5436530 (1995-07-01), Suzuki et al.
patent: 5463269 (1995-10-01), Zimmerman
patent: 5463271 (1995-10-01), Geis et al.
patent: 5463277 (1995-10-01), Kimura et al.
patent: 5475281 (1995-12-01), Heijboer
patent: 5502314 (1996-03-01), Hori
patent: 5505647 (1996-04-01), Sato et al.
patent: 5508584 (1996-04-01), Tsai et al.
patent: 5541466 (1996-07-01), Taylor et al.
patent: 5569974 (1996-10-01), Morikawa et al.
patent: 5572041 (1996-11-01), Betsui et al.
patent: 5604394 (1997-02-01), Saito et al.
patent: 5725787 (1998-03-01), Curtin et al.
"Design, Fabrication and Testing of Microminiature Vacuum Tube Electronics", Y. Zhang, Department of Electrical Engineering, University of Utah, Jun. 1995, pp. 1-82.
"Flat Displays for receivers and Monitors", J. Anderson et al., International Broadcasting Convention, Sep. 16-20 1994, pp. 483-488.
"Progress in Microminiature Thermionic Vacuum Tube Devices", L.P. Sadwick et al., IEDM, 1994, pp. 779-782.
"Thermal Applications of Microbridges", C. Mastrangelo, Ph.D., UMI Dissertation Services, 1994, pp. 1-388.
"Microcavity Vacuum Tube Pressure Sensor for Robot Tactile Sensing", J.C. Jiang, IEEE, 1991, pp. 238-240.
"Physical Considerations in Vacuum Microelectronics Devices", I. Brodie, IEEE Transactions on Electron Devices, vol. 36, No. 11, Nov. 1989, pp. 2641-2644.
"Fluorescent Indicator Panel with Simple Diode Construction", M. Yamaguchi, SID Digest, 1987, pp. 100-102.
"Color Graphic Front Luminous VFD", T.L. Pykosz et al., SID Digest, 1985, pp. 366-369.
"Thermionic Integrated Circuits: A Status Report", D. Wilde, Final Report to Geothermal Energy, Oct. 1980, pp. 1-80.
Hwu R. Jennifer
Sadwick Laurence P.
Patel Vip
University of Utah Research Foundation
LandOfFree
Thermionic optical emission device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermionic optical emission device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermionic optical emission device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-83171