Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1990-03-20
1991-05-07
Henry, Jon W.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
350276R, 350452, 340705, 340980, G02B 2710, G02B 308
Patent
active
050131354
ABSTRACT:
A head up display is provided for projecting as a virtual image the information from control meters in an airplane or an automobile in the front visual field. The display includes a light source disposed at the bottom of a casing, an LCD shutter disposed just above the light source, a first Fresnel lens disposed on the upper surface of the casing for the purpose of enlarging information on the LCD shutter, and a combiner disposed at an adjustable angle on the upper surface of the casing for the purpose of producing a virtual image of the information on the LCD shutter. The first Fresnel lens is disposed on the same face as that of the dashboard, and another Fresnel lens is provided on the front side of the casing so that the meter can be directly viewed through the casing.
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Henry Jon W.
Matsushita Electric - Industrial Co., Ltd.
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