Liquid crystal display with liquid crystal layer and ferroelectric layer connected to drain of TFT
US5986724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Feb 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/061
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display device having a liquid crystal layer driven by a data signal which comprises a TFT for selecting the data signal; and a ferroelectric layer of which a polarized state is controlled corresponding to the data signal selected by the TFT, and the liquid crystal layer responds to the polarized state of the ferroelectric layer, and the liquid crystal layer is driven when the liquid crystal layer responds to the polarized state of the ferroelectric layer. Since the ferroelectric layer can keep stable the polarized state for a long duration, a driving frequency can be reduced substantially to a substantially DC level, and power consumption is reduced to a great extent. In addition, the ferroelectric layer formed in a pixel divides the liquid crystal corresponding to the polarized domains of the ferroelectric layer, thereby showing an analogous grayscale image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.