Projectable passive liquid-crystal flat screen information centers
OwnerBernd Haastertinventor
Life of this patent
Estimating the term…
Abstract
The passive liquid-crystal flat screen which can be projected onto a screen has a flat screen (50) to which an electronic control unit (52) is attached and two polarization filters (36, 38) both of which are located in the light path (arrow 54), the one in front of, and the other behind, the flat screen (50). Both the polarization filters (36, 38) are positioned at such a distance from the flat screen (50) that between the flat screen (50) and each of the polarization filters (36, 38) there is formed an air tunnel or canal in which a current of air flows which impinges on the inner surfaces of the polarization filters (36, 38) and the flat screen (50) and cools these components.
Claims7
A passive, liquid-crystal flat screen apparatus for displaying information, which information can be projected onto a screen, said flat screen apparatus having a flat screen (50) to which an electronic control unit (52) is attached in a housing, and which is also fitted with two polarisation filters (36, 38), both of which are located in a light path, the one in front of and the other behind the flat screen (50), characterized thus:
- That both the polarisation filters (36, 38) are positioned at such a distance from the flat screen (50) that between the flat screen (50) and each of the polarisation filters (36, 38) there is formed an air tunnel or canal in which there flows a current of air (arrows 58, 62) which impinges on the inner surfaces of the polarisation filters (36, 38) and the flat screen (50) and cools them.
Dependencies are inferred from the claim text.