Level shifter for use in LCD display applications
US8390556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2011 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Sep 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0219
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A level shifter for use in LCD display applications is provided which includes a group of separate channels each with a signal input and a signal output and with channel control circuitry supporting gate voltage shaping for improving image quality. The level shifter further has a number of flicker clock inputs. The channel control circuitry of each particular channel in the group comprises logic circuitry combining all of said flicker clock inputs with the signal input of the particular channel and signal inputs form other channels into a gate voltage shaping enable signal for the control circuitry of the particular channel. With this configuration it is possible to use the same level shifter IC with only one flicker clock signal for all phases, regardless of how many, without the need for an additional synchronization signal, or multiple flicker clock signals as is conventional. The level shifter automatically determines which input signal needs to be modified for the gate voltage shaping when the active portion of the flicker clock signal is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.