Field emission display having emitter control with current sensing feedback
US5656892A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1995 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Nov 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emission display includes an emitter driving circuit for providing current to emitters in the display. The emitter driving circuit includes a current mirror to monitor actual current to each pixel in the array. The actual current is then compared to a reference current derived from an image signal based upon an expected current draw of the emitter to produce an error signal. The error signal is fed back to the input of the emitter driver circuit and the emitter driver circuit produces a corrected emitter current in response. During transitions in the image signal, error detection is briefly disabled to allow the emitter driver circuit to respond to the image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.