Mirror with lighted indicia

• US 6,099,154 A
• Filed: 10/23/1998
• Issued: 08/08/2000
• Est. Priority Date: 10/23/1998
• Status: Expired due to Term

• Current Assignee: Aptiv Technologies Limited (BorgWarner Incorporated)
• Original Assignee: Delco Electronics Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Olney, Ross D.
• Primary Examiner(s): Spyrou, Cassandra
• Assistant Examiner(s): Sikder, Mohammad
• Application Number:
  US09/178,236
• Time in Patent Office: 655 Days
• Field of Search: 362/494, 362/498, 362/499, 362/514, 362/516
• US Class Current: 362/494
• CPC Class Codes: B60Q 1/2665 on rear-view mirrors lighting devices for vehicle interior on or for rear-view mirrors B60Q3/258
• CPC Class Codes: B60R 1/1207 with lamps; with turn indicators
• CPC Class Codes: B60R 2001/1215 with information displays
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence

Abstract

In preferred embodiment, a mirror having selectively lightable indicia, including: a substrate of a substantially optically clear material; an optically reflective, optical filter layer disposed on a rear surface of the substrate, the optical filter layer providing at least one relatively narrow bandpass through which light can pass; a plurality of light sources disposed behind the optical filter layer, the plurality of light sources producing light in at least one relatively narrow range of frequencies substantially coincident with the at least one relatively narrow bandpass, such that light from the plurality of light sources can pass through the optical filter and thence through the substrate; and the optical filter layer reflecting, through the substrate, essentially all incident ambient light.

Claims

1. A mirror having selectively lightable indicia, comprising:

(a) a substrate of a substantially optically clear material;

(b) an optically reflective, optical filter layer disposed on a rear surface of said substrate, said optical filter layer providing at least one relatively narrow bandpass of frequencies of light through which only said frequencies of light can pass;

(c) a plurality of light sources disposed behind said optical filter layer, said plurality of light sources producing light in at least one relatively narrow range of frequencies substantially coincident in terms of frequency with said at least one relatively narrow bandpass of frequencies of light, such that light of said frequencies of light from said plurality of light sources can pass through said optical filter and thence through said substrate; and

(d) said optical filter layer reflecting, through said substrate, essentially all incident ambient light falling thereon.

2. A mirror, as defined in claim 1, further comprising:

(a) said plurality of light sources selectively producing light in at least two different relatively narrow ranges of frequencies;

(b) said optical filter layer having two relatively narrow bandpass ranges, coincident with said at least two different relatively narrow ranges of frequencies; and

(c) a mask layer disposed between said optical filter and said plurality of light sources, said mask layer including therein at least two openings defined therethrough, said at least two openings representing at least two indicia to be displayed to person viewing said mirror, said plurality of light sources being arranged to display said at least two indicia in said at least two different relatively narrow ranges of frequencies.

3. A mirror, as defined in claim 2, wherein:

said at least two indicia include a "stop" symbol and a "caution" symbol.

4. A mirror, as defined in claim 2, wherein:

said at least two different relatively narrow ranges of frequencies include light in red and yellow optical spectral regions.

5. A mirror, as defined in claim 1, wherein:

said light sources comprise LEDs.

6. A mirror, as defined in claim 1, wherein:

said light sources comprise elements of an LCD.

7. A mirror, as defined in claim 6, wherein:

said LCD is selectively lightable to produce text.

8. A mirror, as defined in claim 1, wherein:

said mirror is adapted to be employed in a vehicle.

9. A mirror, as defined in claim 7, wherein:

said text is selectable from at least two different items of text.

10. A mirror, as defined in claim 9, wherein:

said at least two different items of text are changeable after construction of said mirror.