Indication display unit for vehicles

Details Indication display unit for vehicles Indication display unit for vehicles

1991-04-25

1992-09-01

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340980, 359 13, 353 14, G09G 302

Patent

active

051442892

ABSTRACT:
The present invention has disclosed an indication display unit for a vehicle enabling a driver to sight an indicated image on a windshield thereof comprising, a display device for indicating an image thereon, a light source for projecting light to the above display device, a lens through which the indicated image is projected on the windshield, a light conducting means provided between the display device and the lens, having a light detecting element and a window portion therein, a shutter means for intercepting incident sunbeams or the like rotatably arranged near said light conducting means, and a control means for controlling the shutter means.
Most of the conventional indication display devices disclosed so far are provided with a semi-translucent mirror, by which the incident rays of light from external world are conducted to the light detecting element in the same path for projecting the indicated pattern displayed on the display device such as an LCD, resulting in that the above pattern reflected on the windshield or the like are apt to be unclear, whereas the present invention provides a driver with a clear reflection of the indicated image.

REFERENCES:
patent: 3715721 (1973-02-01), Irving et al.
patent: 4711544 (1987-12-01), Iino et al.

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