Active matrix field emission display having peripheral regulation of tip current
US5410218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jun 15, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/319
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Field Emission Display ("FED") is disclosed having an array of display grids formed within a region of a semiconductor substrate. The array is defined by a number of rows and a number of columns. Further, a multiplicity of field emitter tips are incorporated for driving the array, each of the tips being coupled with a display grid of the array. To select any row of the array, a row select switch is employed. The row select switch is preferably formed outside the region of the substrate. In operation, a row is selected when a row control signal is received by the row select switch. Further, a column select switch for selecting any of said columns is also employed, formed outside the region. In operation, a column is selected when a column control signal is received by the column select switch. Moreover, a plurality of constant current sources, formed outside the region, are provided for generating a constant current to each of the tips. Each of the constant current sources is enabled by the column control switch. Thus, the number of constant current sources is equal to the number of columns. Utilizing this configuration, a first tip drives a first grid of the array after the row s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.