Display assembly including two superposed display devices
US6600527B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2000 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Jun 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1533
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention concerns a display assembly including two superposed, respectively upper (24) and lower (26) display devices, characterised in that the upper display device (24) includes a double structure formed of a display cell (28) arranged above an optical valve (30), said double structure being arranged so that said cell (28) and said valve (30) are transparent in a first state to make the lower display device visible (26), and that the cell (28) displays an item of data and that the valve (30) is opaque and masks at least partially the lower display device (26) in a second state, control means being provided for supplying a control voltage to the cell (28) and the optical valve (30) to cause them to switch from the first state to the second state and vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.