Information display for rearview mirrors

• US 4,882,565 A
• Filed: 03/02/1988
• Issued: 11/21/1989
• Est. Priority Date: 03/02/1988
• Status: Expired due to Term

• Current Assignee: Donnelly Corporation (Magna International Incorporated)
• Original Assignee: Donnelly Corporation (Magna International Incorporated)
• Inventors: Gallmeyer, William W.
• Primary Examiner(s): Orsino, Joseph A.
• Assistant Examiner(s): Tumm, Brian R.
• Application Number:
  US07/163,387
• Time in Patent Office: 629 Days
• Field of Search: 340/98, 340/107, 340/52 F, 350/600, 350/601, 350/606, 40/219, 40/900, 362/142, 362/135, 362/61, 362/83.1, 342/459, 342/461
• US Class Current: 340/461
• CPC Class Codes: B60Q 3/14 lighting through the surface to be illuminated
• CPC Class Codes: B60Q 3/16 Circuits; Control arrangements
• CPC Class Codes: B60Q 3/85 for manual control of the light, e.g. of colour, orientation or intensity
• CPC Class Codes: B60R 1/12 Mirror assemblies combined with other articles, e.g. clocks
• CPC Class Codes: B60R 1/1207 with lamps; with turn indicators
• CPC Class Codes: B60R 2001/1215 with information displays

Abstract

A rearview mirror assembly for vehicles which displays information useful to the driver/viewer when viewing the mirror assembly. Indicia are formed by narrow deletion lines, preferably using computer controlled laser marking apparatus, in a reflective coating on a mirror element of the assembly. A light source, which may be a light emitting diode, an incandescent bulb or another type source, is positioned behind the mirror element to illuminate the indicia for distinct, clear, precise visibility by the driver/viewer. The lines of the deletion area are sufficiently narrow as to be generally unnoticeable to the unaided viewer'"'"'s eyes when a rear vision image is reflected by the reflecting surface and the light source is unlit thereby preventing interference with normal driving use of the mirror assembly. The light source may be used to simultaneously illuminate portions of the vehicle as well as the deletion area indicia.

Claims

1. An improved rearview mirror assembly for vehicles of the type including a mirror element having a reflective surface thereon and information means for providing information to a viewer of the mirror;

the improvement comprising;

said information means including a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface; and

light source means for illuminating said deletion area when lit/activated, said light source means positioned behind said reflective surface on the side of said mirror element opposite that from which said mirror element will be viewed in a vehicle;

said deletion area including at least one deletion line having a width which is sufficiently narrow to provide minimal contrast between the reflective surface and said line and thus be generally unnoticeable to the unaided eye of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

2. The improved rearview mirror assembly of claim 1 wherein said deletion line has a width of less than or equal to 0.005 inches.

3. The improved rearview mirror assembly of claim 1 wherein said mirror element is a substantially transparent substrate having a first surface adapted to face the interior of a vehicle and a second surface on the side of said element opposite said first surface;

said second surface including a reflective coating thereon;

said deletion line being a narrow line in said reflective coating.

4. The improved rearview mirror of claim 3 wherein said deletion area includes a plurality of ultra-narrow deletion lines in said reflective coating, said lines forming at least one symbol, word or other indicia.

5. The improved rearview mirror of claim 4 including at least one additional deletion area which includes a plurality of ultra-narrow deletion lines forming a symbol, word or other indicia in said reflective coating.

6. The improved rearview mirror assembly of claim 5 wherein said deletion and additional deletion areas are arranged in a group adjacent and near one another in an area of said reflective coating adjacent an edge of said mirror element whereby any interference with rear vision images in said mirror by said deletion and additional deletion areas is minimal.

7. The improved rearview mirror assembly of claim 6 wherein said deletion and additional deletion areas include separate warning symbols for different vehicle functions and components such as seat belt fastening, engine oil level and engine coolant temperature.

8. The improved rearview mirror assembly of claim 1 wherein said light source means includes means for illuminating other parts of said vehicle in addition to said deletion area.

9. The improved rearview mirror assembly of claim 1 wherein said light source means include a light source and means on said reflective surface for mounting said light source in alignment with said deletion area.

10. The improved rearview mirror assembly of claim 9 wherein said light source is a light emitting diode;

said means for mounting said light source including a housing having a receptacle receiving said diode.

11. An improved rearview mirror assembly for vehicles of the type including a mirror element having a reflective surface thereon and information means for providing information to a viewer of the mirror;

the improvement comprising;

said information means including a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface; and

light source means for illuminating said deletion area when lit/activated, said light source means positioned behind said reflective surface on the side of said mirror element opposite that from which said mirror element will be viewed in a vehicle and including a light for providing interior lighting within said vehicle;

said deletion area defining a symbol, word or other indicia indicating activating of said light;

said deletion area being sufficiently narrow as to be generally unnoticeable to the unaided eye of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

12. The improved rearview mirror assembly of claim 11 wherein said light is mounted in a light holder behind said mirror element in a mirror case supporting said mirror element, said case including a first light aperture opening downwardly from said case, said light providing light downwardly of said case through said aperture when activated.

13. The improved rearview mirror assembly of claim 12 wherein said light holder also includes a second light aperture aligned with said symbol, word or other indicia such that said light provides said light source means and illuminates said symbol, word or other indicia through said second light aperture when activated while simultaneously providing light downwardly of said assembly through said first light aperture.

14. An improved rearview mirror assembly for vehicles of the type including a mirror element having a reflective surface thereon and information means for providing information to a viewer of the mirror;

the improvement comprising;

said information means including a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface; and

light source means for illuminating said deletion area when lit/activated, said light source means positioned behind said reflective surface on the side of said mirror element opposite that from which said mirror element will be viewed in a vehicle;

said light source means including a light source and means on said reflective surface for mounting said light source in a alignment with said deletion area, said light source including a light emitting diode, said means for mounting said light source including a housing having a receptacle receiving said diode and a spacer adhered to said reflective surface over said deletion area, said spacer having an aperture extending therethrough allowing light from said light emitting diode to pass through said spacer to said deletion area while shielding said light from the remainder of said assembly;

said housing being adhered to the rear surface of said spacer;

said deletion area being sufficiently narrow as to be generally unnoticeable to the unaided eye of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

15. The improved rearview mirror assembly of claim 14 wherein said mirror element is a prism and includes a front surface and a rear surface extending at an angle to said front surface;

said spacer having front and back surfaces also extending at a predetermined angle such that said housing is supported generally parallel to said front surface of said mirror element.

16. The improved rearview mirror assembly of claim 14 including a thin sheet of light filtering material positioned intermediate said deletion area and said spacer.

17. The improved rearview mirror assembly of claim 16 including a sheet of double sided adhesive material for adhering said filtering material over said deletion area, said adhesive material also helping to seal off any portions of said reflective layer at said deletion area from the atmosphere.

18. The improved rearview mirror assembly of claim 14 including an additional deletion area;

said housing including an additional light emitting diode for said additional deletion area;

said spacer including an additional aperture therethrough for said additional diode.

19. An improved rearview mirror assembly for vehicles of the type including a mirror element having a reflective surface thereon and information means for providing information to a viewer of the mirror;

the improvement comprising;

said information means including a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface;

light source means for illuminating said deletion area with lit/activated, said light source means positioned behind said reflective surface on the side of said mirror element opposite that from which said mirror element will be viewed in a vehicle; and

light filtering means positioned between said deletion area and said light source means for filtering the light from said light source means which is visible at said deletion area;

said deletion area including at least one deletion line having a width which is sufficiently narrow to provide minimal contrast between the reflective surface and said line and thus be generally unnoticeable to the unaided eyes of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing a highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

20. The improved rearview mirror assembly of claim 19 wherein said light filtering means includes absorbing means for absorbing light of predetermined wavelength such that light of predetermined color is visible at said deletion area.

21. An improved rearview mirror assembly for vehicles of the type including a mirror element having a reflective surface thereon and information means for providing information to a viewer of the mirror;

the improvement comprising;

said information means including a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface; and

light source means for illuminating said deletion area when lit/activated, said light source means positioned behind said reflective surface on the side of said mirror element opposite that from which said mirror element will be viewed in a vehicle;

light filtering means positioned between said deletion area and said light source means for filtering the light from said light source means which is visible at said deletion area;

said deletion area being sufficiently narrow as to be generally unnoticeable to the unaided eyes of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing a highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated;

said light filtering means including absorbing means for absorbing light of predetermined wavelength such that light of predetermined color is visible at said deletion area;

at least one additional deletion area defining a separate information symbol, word or other indicia;

said absorbing means including transparent areas of at least two different colors whereby said information symbols words, or other indicia of said deletion and additional deletion areas are visible in different colors.

22. The improved rearview mirror assembly of claim 21 wherein said absorbing means includes a thin transparent sheet of material imprinted with at least two separate areas of colored, transparent ink.

23. The improved rearview mirror assembly of claim 21 wherein said light source means includes at least two separate light emitting diodes, each diode positioned in alignment with one of said information symbols, words or other indicia.

24. A rearview mirror assembly for vehicles comprising:

a mirror element having a reflective surface thereon;

a mirror case for supporting said mirror element therein, said case having back, top, bottom and end walls defining an opening in which said mirror element is mounted, said case including an interior space between said mirror element and said back wall;

a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface;

light source means for illuminating said deletion area when lit/activated, said light source means positioned in said interior space;

said deletion area including at least one deletion line having a width which is sufficiently narrow to provide minimal contrast between the reflective surface and said line and thus be generally unnoticeable to the unaided eye of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing a highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

25. The rearview mirror assembly of claim 24 wherein said mirror element is a substantially transparent substrate having a first surface adapted to face the interior of a vehicle and a second surface on the side of said element opposite said first surface;

said second surface including a reflective coating thereon and forming said reflective surface;

said deletion line being a narrow line in said reflective coating.

26. The rearview mirror of claim 25 wherein said deletion area includes a plurality of ultra-narrow deletion lines in said reflective coating, said lines forming at least one symbol, word or other indicia.

27. The improved rearview mirror assembly of claim 26 including an additional one of said deletion areas including additional ones of said ultra-narrow deletion lines forming a symbol, word or other indicia, said deletion and additional deletion areas arranged in a group adjacent and near one another in an area of said reflective coating adjacent an edge of said mirror element whereby any interference with rear vision images in said mirror by said deletion areas will be minimal.

28. The rearview mirror assembly of claim 27 wherein each of said deletion lines is formed with a laser marking apparatus and has a width of less than or equal to 0.005 inches.

29. The rearview mirror assembly of claim 27 wherein said deletion and additional deletion areas include separate warning symbols for different vehicle functions and components such as seat belts fastening, engine oil level, fuel level and engine coolant temperature.

30. The rearview mirror assembly of claim 24 wherein said light source means includes means for illuminating other parts of said vehicle in addition to said deletion area.

31. The rearview mirror assembly of claim 24 wherein said light source means include a light source and means on said reflective surface for mounting said light source in alignment with said deletion area.

32. The rearview mirror assembly of claim 31 wherein said light source is a light emitting diode;

said means for mounting said light source including a housing having a receptacle receiving said diode.

33. A rearview mirror assembly for vehicles comprising:

a mirror element having a reflective surface thereon;

a mirror case for supporting said mirror element therein, said case having back, top, bottom and end walls defining an opening in which said mirror element is mounted, said case including an interior space between said mirror element and said back wall;

a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface;

light source means for illuminating said deletion area when lit/activated, said light source means positioned in said interior space and including a light for providing interior lighting within said vehicle;

said deletion area defining a symbol, word or other indicia indicating activation of said light;

said deletion area being sufficiently narrow as to be generally unnoticeable to the unaided eye of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing a highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

34. The rearview mirror assembly of claim 33 wherein said light is mounted in a light holder behind said mirror element in said mirror case supporting said mirror element, said case including a first light aperture opening downwardly from said case, said light providing light downwardly of said case through said aperture when activated.

35. The rearview mirror assembly of claim 34 wherein said light holder also includes a second light aperture aligned with said symbol, word or other indicia such that said light provides said light source means and illuminates said symbol, word or other indicia through said second light aperture when activated while simultaneously providing light downwardly of said assembly through said first light aperture.

36. A rearview mirror assembly for vehicles comprising:

a mirror element having a reflective surface thereon;

a mirror case for supporting said mirror element therein, said case having back, top, bottom and end walls defining an opening in which said mirror element is mounted, said case including an interior space between said mirror element and said back wall;

a narrow deletion area in said reflective surface in which said reflective surface is removed to form an opening of predetermined shape such as a symbol, word or other indicia in said reflective surface;

light source means for illuminating said deletion area when lit/activated, said light source means positioned in said interior space and including a light source and means on said reflective surface for mounting said light source in alignment with said deletion area, said light source including a light emitting diode;

said means for mounting said light source including a housing having a receptacle receiving said diode and a spacer adhered to said reflective surface over said deletion area, said spacer having an aperture extending therethrough allowing light from said light emitting diode to pass through said spacer to said deletion area while shielding said light from the remainder of said assembly;

said housing being adhered to the rear surface of said spacer;

said deletion area being sufficiently narrow as to be generally unnoticeable to the unaided eye of the viewer of the mirror element when viewing a rear vision image reflected by said reflective surface and said light source means is unlit/unactivated, but providing a highly distinct, clear and precise lighted indicia visible to the mirror viewer when said light source means is lit/activated.

37. The rearview mirror assembly of claim 36 wherein said mirror element is a prism and includes a front surface and a rear surface extending at an angle to said front surface;

said spacer having front and back surfaces also extending at a predetermined angle such that said housing is supported generally parallel to said front surface of said mirror element;

said case including actuator means for pivoting said case and prism mirror element between a full reflectivity day position and a reduced reflectivity night position.