Illumination – Supported by vehicle structure – Condition responsive
Patent
1988-05-24
1989-10-17
Arnold, Bruce Y.
Illumination
Supported by vehicle structure
Condition responsive
350320, 362 29, 34081513, 340459, G02B 2714, G01D 1128, B60Q 100, G08B 536
Patent
active
048742244
ABSTRACT:
A view control prism display system in which the viewable angle of an informational display (15) is controlled and limited to certain desired areas (17) by utilizing the reflective and refractive properties of an optical prism element (10) used in association with the informational display. In the exemplary application of a button (6B) in an instrument cluster in an automotive environment (5), the informational display is included as an applique (15) on a flat surface provided adjacent to but spaced from the optical prism by an air gap (14). A further, "decorated" surface (13) which can be painted black or be frosted, is provided on an adjacent, bottom surface of the optical prism. Within the desired viewing angle in front (11) of the button, the viewer will see the refracted image of the information contained on the applique, while those outside (18) of the desired viewing angle will "see" the reflected image of the non-informational "decorated" surface. Likewise, by properly designing the angles of the various surfaces of the optical prism and the locations of the two surfaces, the informational image will not be projected onto the interior side ("CVZ") of the windshield (9), which is located outside of the desired viewing range of angles, preventing any daytime or nighttime reflections from being generated on the windshield or, if so designed, any of the side windows.
REFERENCES:
patent: 1871877 (1932-08-01), Buckman
patent: 4635033 (1987-01-01), Inukai et al.
Sears & Zemansky University Physics (Addison-Wesley Pub. Co., Inc. 3rd Ed., 1964) pp. 832-836 and 841-846.
John A. Kuecken Fiberoptics (Tab Books, Inc., 1980) pp. 129-137.
Gutman Robert F.
Migrin Robert
Arnold Bruce Y.
Kachmarik Ronald M.
United Technologies Automotive Inc.
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