Display element, writing method and writing apparatus
US6618102B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Sep 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a display element in which three or more display layers for displaying mutually different color lights are stacked within one pixel and which controls display states of the plural display layers by applying a voltage from the outside of the plural display layers, eight colors—white, black, blue, green, red, cyan, magenta, and yellow—can be displayed within one pixel. Display layers having cholesteric liquid crystals selectively reflecting blue, green, and red lights are stacked between a pair of substrates, and a light absorption layer is formed on the back of the substrate of a non-display side. Threshold voltages of orientation change of the display layers are mutually changed, and a threshold voltage Vpf90(A) of change from a planar state to a focal conic state of the display layer having the highest threshold voltage is made higher than a threshold voltage Vfh90(C) of change from a focal conic state to a homeotropic state of the display layer having the lowest threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.