Quasi color LCD
AssigneeDurel Corporation
InventorsKenneth Vi Ung, Mahyar Vahabzadeh-Hagh, Harold Gee Yee, Robert Gary Minnick, Walter J. Paciorek
Life of this patent
Estimating the term…
Abstract
A light source and a liquid crystal display are separated by a transparent, color graphic to simulate a color liquid crystal display. The light source preferably produces a substantially white light, as is available by cascading materials, and includes discrete or diffuse sources. The liquid crystal display is preferably positive (black on white) rather than negative to reveal more of the graphic. With an EL light source, the graphic can be printed on the transparent substrate of the EL lamp. In liquid crystal displays having a transflective layer, the transflective layer can be located between the light source and the graphic layer.
Claims20
In an electronic device having a display including a monochromatic liquid crystal for displaying information and a light source for back lighting the liquid crystal, the improvement comprising:
- a transparency interposed between said liquid crystal and said light source, said transparency including an image.
A display comprising:
- a monochromatic liquid crystal for displaying information;
- a light source for back lighting the liquid crystal;
- a transparency interposed between said liquid crystal and said light source, said transparency including an image.
A display comprising:
- a monochromatic liquid crystal display;
- an EL lamp for back lighting the liquid crystal display, wherein said EL lamp includes
- a transparent substrate having a first major surface and a second major surface;
- a transparent conductive layer on said first major surface;
- and
- a graphic printed on said second major surface.
Dependencies are inferred from the claim text.