Flat panel display drive circuit with switched drive current
US5644195A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1996 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Mar 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0809
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Field Emission Display ("FED") is disclosed having a brightness to project images. To achieve this benefit, the FED comprises a pixelator is coupled to a display for displaying and projecting the image. By design, the pixelator conducts a current, corresponding to a degree of brightness in the resulting panel display, through the display grid. A first resistor having a first value, is coupled between the pixelator and a voltage node or ground. Moreover, a second resistor having a second value comprising at most one half of the first value is employed. A switch for connecting the first resistor in parallel with the second resistor is utilized such that when a control signal is received, the switch is enabled and the equivalent resistance between the pixelator and a voltage node or ground is substantially reduced. In one embodiment of the invention, the first resistor comprises a resistive layer, while the second resistor comprises a tap for tapping the resistive layer between the first and second terminations of the resistive layer, thereby creating the second resistor smaller than the first resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.