Active matrix vacuum fluorescent display with microprocessor integration
US5473222A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jul 5, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A glass envelope contains a silicon substrate which embodies an active matrix anode array, a microprocessor, and anode driving circuits. A small number of pins on the envelope couple display parameters and control signals to the microprocessor, and logic and anode signal voltages are supplied to the substrate. The microprocessor determines which pixels in the anode array should be energized and the driving circuit addresses the array and applies energizing voltage to the selected pixels. The driving circuit is supplied by the low signal voltage and includes a voltage level shifting function to increase the level by an order of magnitude to realize a voltage high enough for adequate display brightness. The display can be made small due to the small number of pins required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.