Holographic signaling mirror

• US 5,436,741 A
• Filed: 12/28/1993
• Issued: 07/25/1995
• Est. Priority Date: 12/28/1993
• Status: Expired due to Fees

• Current Assignee: HARMAN AUTOMOTIVE, INC.
• Original Assignee: HARMAN AUTOMOTIVE, INC.
• Inventors: Crandall, Robert M.
• Primary Examiner(s): Shafer, Ricky D.
• Time in patent office: 574 Days
• Field of Search: 359/15, 359/567, 359/581, 359/584, 359/589, 359/839, 359/884, 359/13, 359/14, 359/602, 359/843, 359/877, 362/30, 362/83.1, 362/135, 362/290, 362/296, 340/468, 340/475, 340/479
• US Class Current: 359/15
• CPC Class Codes: B60Q 1/2665 on rear-view mirrors lighting devices for vehicle interior on or for rear-view mirrors B60Q3/258; rear-view mirror arrangements B60R1/02; mirror assemblies combined with lamps B60R1/1207; adaptations or arrangements of mirrors for use on cycles B62J29/00
• CPC Class Codes: B60R 1/1207 with lamps; with turn indicators

Abstract

A signaling mirror assembly for mounting to an exterior of a motor vehicle comprises a mirror shell mounted to a side of the vehicle body and a mirror mounted within the shell having reflectivity of at most 70% and transmissivity of at least 40%. The signaling mirror also has a light source disposed between the mirror and the shell which is operably illuminated in response to operating signals. Also included is diffractive means disposed between the light source and the mirror for diverting light from the vehicle operator to a viewing pattern which generally fans out from the side of the vehicle body.

Claims

1. A signaling mirror assembly for an exterior of a motor vehicle comprising:

a mirror shell adapted for mounting to a side of a vehicle body having a rear facing aperture;

a semi-transparent mirror mounted to the shell and generally closing the aperture of the mirror shell and having a reflectivity characteristic reflecting up to 70% of the visible spectrum of light and having a transmissivity characteristic allowing a transmission of at least 40% of a selected frequency band of the visible spectrum of light therethrough;

a light source mounted within the mirror shell and being operably illuminated in response to an input voltage signal; and

a diffractive element disposed between the light source and the mirror and configured to divert entirely by diffraction light from the light source away from a vehicle operator'"'"'s view to a viewing pattern generally fanning outward from the side of the vehicle body.

2. A signaling mirror assembly as claimed in claim 1, further comprising filter means for transmitting only a predetermined spectrum of light frequencies, being disposed between the light source and a viewer of the light from the light source.

3. A signaling mirror assembly as claimed in claim 2, wherein the filter means includes a dielectric coating on a surface of the mirror.

4. A signaling mirror system as claimed in claim 1, further comprising a glass case to which the mirror is attached having a light well wherein the light source is removably disposed.

5. A signaling mirror assembly for an exterior of a motor vehicle comprising:

a mirror shell adapted for mounting to a side of a vehicle body having a rear facing aperture;

a semi-transparent mirror mounted to the shell and generally closing the aperture of the mirror shell and having a reflectivity characteristic reflecting up to 70% of the visible spectrum of light and having a transmissivity characteristic allowing a transmission of at least 40% of a selected frequency band of the visible spectrum of light therethrough;

a light source mounted within the mirror shell and being operably illuminated in response to an input voltage signal; and

a diffractive element disposed between the light source and the mirror and configured both to divert light from the light source away from a vehicle operator'"'"'s view to a viewing pattern generally fanning outward from the side of the vehicle body and to diffuse light from the light source.

6. A signaling mirror assembly for an exterior of a motor vehicle comprising:

a mirror shell adapted for mounting to a side of a vehicle body having a rear facing aperture;

a semi-transparent mirror mounted to the shell and generally closing the aperture of the mirror shell and having a reflectivity characteristic reflecting up to 70% of the visible spectrum of light and having a transmissivity characteristic allowing a transmission of at least 40% of a selected frequency band of the visible spectrum of light therethrough;

a light source mounted within the mirror shell and being operably illuminated in response to an input voltage signal; and

a hologram disposed between the light source and the mirror and configured to divert light from the light source away from a vehicle operator'"'"'s view to a viewing pattern generally fanning outward from the side of the vehicle body.

7. A signaling mirror assembly as claimed in claim 6, wherein the hologram is a thin flexible film adhesively bonded to a side of the mirror disposed toward the light source.

8. A signaling mirror system as claimed in claim 6, further comprising an electric mirror actuator functionally disposed between the mirror shell and a glass case and pivotally positioning the glass case and mirror in response to an input provided by a vehicle operator.

9. A visual signaling apparatus disposed in a mirror mounted to an exterior of a motor vehicle for use by an operator thereof in signaling operation of the vehicle brakes, turn signal, and four-way flashers, the signaling apparatus comprising:

a mirror shell mounted to a side of the vehicle body defining a chamber and a rear-facing aperture therein;

a light source mounted within the chamber of the mirror shell;

a semi-transparent dichroic mirror supported by the mirror shell and substantially occluding the aperture thereof and reflecting at most 70% of the visible light spectrum and substantially transmit at least 40% of a selected frequency band of the visible light spectrum; and

a light diffracting hologram disposed between the light source and the mirror diverting light emitted by the light source away from the driver for viewing by an observer positioned behind the mirror and beside the vehicle and diffusing the light to provide a near uniform intensity of light over an area of the signal.

10. A visual signaling apparatus as claimed in claim 9, wherein the hologram is a thin flexible film adhesively bonded to a side of the mirror disposed toward the light source.

11. A visual signaling apparatus as claimed in claim 9, further comprising a dielectric coating on the mirror acting as a red band pass filter.