Light emitting panel assemblies for use in automotive applications and the like

• US 5,895,115 A
• Filed: 01/16/1996
• Issued: 04/20/1999
• Est. Priority Date: 01/16/1996
• Status: Expired due to Term

• Current Assignee: Innovative Display Technologies LLC (Acacia Research Corporation)
• Original Assignee: Lumitex Incorporated
• Inventors: Parker, Jeffery R., Hough, Thomas A., Miller, Mark D.
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US08/585,062
• Time in Patent Office: 1,190 Days
• Field of Search: 362/26, 362/27, 362/31, 362/32, 362/235, 362/244, 362/278, 362/320, 362/459, 362/487, 362/496, 362/511, 362/543, 362/544, 362/545
• US Class Current: 362/511
• CPC Class Codes: B60Q 1/0082 mounted on the steering wheel
• CPC Class Codes: B60Q 1/26 the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
• CPC Class Codes: B60Q 1/32 for indicating vehicle sides , e.g. clearance lights
• CPC Class Codes: B60Q 3/14 lighting through the surface to be illuminated
• CPC Class Codes: B60Q 3/252 Sun visors
• CPC Class Codes: B60Q 3/64 for a single lighting device
• CPC Class Codes: B60Q 3/66 for distributing light among several lighting devices
• CPC Class Codes: G09F 13/0472 Traffic signs
• CPC Class Codes: G09F 13/18 Edge-illuminated signs
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: H01H 13/83 characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
• CPC Class Codes: H01H 2219/014 LED
• CPC Class Codes: H01H 2219/018 Electroluminescent panel
• CPC Class Codes: H01H 2219/044 Edge lighting of layer
• CPC Class Codes: H01H 2219/056 Diffuser; Uneven surface
• CPC Class Codes: H01H 2219/062 Light conductor
• CPC Class Codes: H01H 2231/026 Car

Abstract

Light emitting panel assemblies include in one form of the invention a light emitting panel member made of a transparent resiliently deformable elastomeric material that absorbs impact without breakage for use in automotive lighting applications of various types. In another form of the invention, a rigid light emitting panel member may be used with dome switches for switch area lighting or to backlight control buttons/key pads by providing holes or openings in the panel member for the control buttons/key pads. Also, a rigid light emitting panel member may be used as a structural member, and two or more such light emitting panel members may be stacked together and used to light an instrument panel or the like. One or more light sources may be mounted within one or more light transition areas adjacent one or more light input surfaces of the light emitting panel members. Also one or more light sources may be positioned adjacent one side of the light emitting panel members for causing light to shine through the panel members or through holes in the panel members for performing specified lighting functions.

Claims

1. A light emitting panel assembly in combination with a body portion of a vehicle, said panel assembly comprising a solid one-piece light emitting panel member made out of a transparent resiliently deformable material that allows flexing of said panel member without breakage, said panel member having a relatively low profile including a greater cross sectional width than thickness and including top and bottom surfaces, and a light transition region for receiving light from a light source and directing such light through said panel member and emission out through a light emitting surface on one of said top and bottom surfaces, said panel member being mounted on said body portion with said light emitting surface facing outwardly for emission of light out through said light emitting surface from a light source associated with said light transition region, said panel member being located on an exterior surface of said body portion so as to provide a running light on said vehicle.

2. The assembly of claim 1 further comprising a light source embedded, potted or bonded within said light transition region.

3. The assembly of claim 1 further comprising a fiber optic light pipe for transmitting light to said light transition region from a remote light source.

4. The combination of claim 1 further comprising a lens or film covering said light emitting surface of said panel member.

5. A light emitting panel assembly in combination with a body portion of a vehicle, said panel assembly comprising a solid one-piece light emitting panel member made out of a transparent resiliently deformable material that allows flexing of said panel member without breakage, said panel member having a relatively low profile including a greater cross sectional width than thickness and including top and bottom surfaces, and a light transition region for receiving light from a light source and directing such light through said panel member and emission out through a light emitting surface on one of said top and bottom surfaces, said panel member being mounted on said body portion with said light emitting surface facing outwardly for emission of light out through said light emitting surface from a light source associated with said light transition region, said panel member being mounted at an exterior corner of said vehicle with said light emitting surface facing outwardly to provide illumination adjacent said corner, and said light transition region and said associated light source being located inwardly of an outermost edge of said corner to minimize the risk of damage to said light source in the event said outermost edge is impacted during a minor traffic accident.

6. The combination of claim 5 wherein said light emitting surface of said panel member wraps around said corner to provide illumination around said corner.

7. The combination of claim 5 wherein said panel member is at a rear corner of said vehicle to provide a running taillight for said vehicle.

8. The combination of claim 5 wherein a plurality of light sources associated with said light transition region are located inwardly of said outermost edge of said corner to minimize the risk of damage to any of said light sources in the event said outermost edge is impacted during a minor traffic accident.

9. The combination of claim 5 further comprising an other light source located directly behind said panel member for shining light through said panel member independently of the light emitted by said panel member from said light source associated with said light transition region.

10. The combination of claim 9 wherein said other light source provides greater illumination through said panel member than the light emitted by said panel member from said light source because of the greater light concentration effect of said other light source shining directly through said panel member.

11. The combination of claim 10 wherein said other light source comprises one or more light emitting diodes, incandescent or halogen lamps located directly behind said panel member.

12. The combination of claim 10 wherein said other light source produces sufficient illumination through said panel member to provide a brake light, turn signal light, or turning or backup light for said vehicle.

13. The combination of claim 9 further comprising a trans reflector on said panel member through which a portion of the light from said other light source passes.

14. The combination of claim 9 further comprising a hole through said panel member in line with said other light source to provide unobstructed passage of light from said other light source through said hole in said panel member.

15. A light emitting panel assembly in combination with a body portion of a vehicle, said panel assembly comprising a solid one-piece light emitting panel member made out of a transparent resiliently deformable material that allows flexing of said panel member without breakage, said panel member having a relatively low profile including a greater cross sectional width than thickness and including top and bottom surfaces, and a light transition region for receiving light from a light source and directing such light through said panel member and emission out through a light emitting surface on one of said top and bottom surfaces, said panel member being mounted on said body portion with said light emitting surface facing outwardly for emission of light out through said light emitting surface from a light source associated with said light transition region, said body portion comprising a trunk lid of a vehicle.

16. A light emitting panel assembly in combination with a body portion of a vehicle, said panel assembly comprising a solid one-piece light emitting panel member made out of a transparent resiliently deformable material that allows flexing of said panel member without breakage, said panel member having a relatively low profile including a greater cross sectional width than thickness and including top and bottom surfaces, and a light transition region for receiving light from a light source and directing such light through said panel member and emission out through a light emitting surface on one of said top and bottom surfaces, said panel member being mounted on said body portion with said light emitting surface facing outwardly for emission of light out through said light emitting surface from a light source associated with said light transition region, said panel member forming an exterior surface of said body portion.