Display device
US5347201A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1992 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Sep 11, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/8625
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention is about new cathode structures involving the FEAs (field emitter arrays) and the application of these new cathode structures in EFD (Electron Fluorescent Display), EFLCD (Electron Fluorescent Liquid Crystal Display) and MFD (Microtip Fluorescent Display) type direct matrix addressed type display. One aspect of this invention is related to eliminating the difficulty large area FEA cathode manufacturing by combining the control apparatus of EFD and EFLCD with the efficient electron emission process of the FEA. The second aspect of this invention is related to the employment of local embedded circuit components to help enhancing the uniformity of the electron emitting process of FEA. The preferred embodiments of the invented cathode structure in EFD or EFLCD employ multiple pieces of field emitter arrays sparsely disposed inside a vacuum chamber to generate the electron clouds which is then accelerated and controlled by other control means of EFD or EFLCD structures. The preferred embodiments of the invented cathode structure in MFD variety devices provides the benefit of improved the uniformity, lower the control voltage range and increased duty factor independent by …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.