Display device employing liquid crystal materials
Abstract
Abstract A display device settable between transparent and translucent or opaque conditions comprising of a layer of a material changeable between light-transmitting and light-scattering conditions in response to electric fields, such as the liquid crystal materials, means for setting up electric fields through said layer, a plurality of superposed relatively spaced, slanting slats located behind the rear face of said layer, said slats having dark, light absorbing front surfaces and bright, lightreflecting rear surfaces, a source of light located behind said slats adjacent the rear ends thereof, for the slats to conduct the light generated by said source obliquely through said layer in such a manner that it misses the eyes of an observer in front of said layer, and a cover arranged over said source of light and having a light-reflecting inner surface.
Inventors
- 👤 W Aiken
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |