Method and apparatus for selective enabling of Addressable display elements
US6456281B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Apr 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0275
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for driving a plurality of addressable elements consist of driving and selectively enabling one or more addressable elements arranged as an M×N array using two drivers. The columns may be addressed in parallel. Columns may be coupled to a conductor by a charge transfer/isolation circuit. A voltage waveform or pulse train may be propagated down the display conductor such that a pulse is present on the display conductor for each element of a row of elements to be addressed. When the beginning of the pulse train has propagated to the last column tap-off point so that a different pulse is present at each column tap-off point corresponding to the row of elements to be selected, a corresponding charge is transferred to each column conductor in parallel. Thus, a voltage is supplied to select each element on the selected row as determined by the state of the pulse train at each column tap-off point. During the time the voltages are supplied to the column conductors, the column conductors are isolated from the column tap-off points so that a next pulse train corresponding to the next element row may be propagated down the conductor. The rows may be selected by a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.