Method and apparatus for amplitude band enabled addressing arrayed elements
US5977961A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1996 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Arrayed display pixels are coupled such that all row pixels are coupled together by a row conductive element and all column pixels are coupled together by a column conductive element. The row-coupled pixels are driven by first and second row drivers and the column-coupled pixels are driven by first and second column drivers, a total of four drivers in all. The drivers each output time-varying signals of different frequencies. The vertical scan rate is determined by the frequency differential in the signals output by the two row drivers, and the horizontal scan rate frequency is determined by the frequency differential in the signals output by the two column drivers. The absolute frequencies of the four signals are set proportional to the propagation delay of the medium through which the driver signals travel. The invention implements a pixel enabling signal using the beat-frequency difference between two driver source signals that propagate through a pixel string from opposite ends of the string. The driver difference signal dwells sufficiently long on each pixel location to deliver sufficient energy to turn the pixel on or off. Video information to be displayed is used to modulate…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.