Method and circuit to optimize N-line LCD power consumption
US9128713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/023
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention generally provide an input device that includes one or more source drivers that are coupled to a display screen. Specifically, one of the source drivers may be coupled to a plurality of source lines (or column lines) on the display screen which the source driver uses to set voltages associated with one or more sub-pixels that determine the color displayed by the pixel. When driving voltages onto subsequent source lines, the input device may precharge the source driver using a latent voltage stored on the source lines. That is, if the source line was previously driven to a particular voltage by the source driver, the input device uses that latent voltage to precharge the output of the source driver to the same voltage. The source driver may then adjust its output to a desired voltage and drive the desired voltage onto the source line and sub-pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.