Select line driver for a display matrix with toggling backplane
US5949398A · kind A · utility
344Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1996 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Apr 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When a given row in an array of a liquid crystal display having a toggling backplane voltage is de-selected, the row select line voltage also toggles to prevent capacitive current in the pixel capacitance. The row select line driver includes a pair of transistors coupled in a push-pull configuration. The pair of transistors are responsive to a control signal that is produced in a corresponding stage of cascaded stages of a shift register. The pair of transistors form a buffer stage that prevents the toggling voltage developed in the row select line when the row is de-selected from affecting the operation of the shift register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.