Display device
US5657039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1994 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Nov 3, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0876
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
On a matrix form display panel which realizes a display device with a high image quality, the return circuits of condensers, connected to picture elements in the last row among picture elements arranged in a matrix form, are connected to a common line independently of the return circuits of the condensers in the other rows, a common electrode driving circuit is provided, and a common electrode driving voltage is applied, whereby the effective values of driving voltages applied to the picture elements in the last row are equalized to the effective values of driving voltages applied to the picture elements in the other rows. Thereby, all the picture elements forming the panel are equal in optical transmissivity, and as a result the displayed image quality is improved. Additionally, since the last scanning line can be used for displaying, the utility factor of display panel is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.