Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1988-01-25
1990-08-28
Oberley, Alvin
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
350331T, 353 60, G09G 336
Patent
active
049529250
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.
REFERENCES:
patent: 3844650 (1974-10-01), Nicholson et al.
patent: 3895866 (1975-07-01), de Quervain et al.
patent: 4563067 (1986-01-01), Ozeki
patent: 4652101 (1987-03-01), Grunwald
patent: 4671634 (1987-06-01), Kizaki et al.
patent: 4763993 (1988-08-01), Vogeley et al.
patent: 4772098 (1988-09-01), Ogawa
Cornaby K. S.
Hjerpe Richard
Oberley Alvin
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