Integrated display panel assemblies

• US 5,975,711 A
• Filed: 06/09/1997
• Issued: 11/02/1999
• Est. Priority Date: 06/27/1995
• Status: Expired due to Term

• Current Assignee: Rambus Delaware LLC (Rambus Inc.)
• Original Assignee: Lumitex Incorporated
• Inventors: Kelsch, Daniel N., Parker, Jeffery R., Miller, Mark D.
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US08/871,391
• Time in Patent Office: 876 Days
• Field of Search: 362/24, 362/26, 362/27, 362/30, 362/31, 362/85, 362/86, 362/88, 200/312, 200/313, 200/314, 200/317, 349/62, 349/65
• US Class Current: 362/24
• CPC Class Codes: A61B 2090/309 using white LEDs
• CPC Class Codes: G02B 6/0033 Means for improving the coupling-out of light from the light guide
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0038 Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/006 to produce indicia, symbols, texts or the like
• CPC Class Codes: G02B 6/0061 to provide homogeneous light output intensity
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• 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 2221/07 transparent
• CPC Class Codes: H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials

Abstract

Integrated display panel assemblies include a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through the panel. On one of the sides of the panel is a first light emitting area for causing a portion of the conducted light to be emitted from the panel for backlighting an LCD or other display supported by the panel in overlying relation to the first light emitting area. The remainder of the conducted light passes beneath the first light emitting area to other light emitting areas on the panel for illuminating other displays associated with the other light emitting areas.

Claims

1. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, and an other display associated with said other light emitting area, said first display comprising a liquid crystal display supported by said panel.

2. The assembly of claim 1 wherein said other display comprises key pads of a keyboard supported by said panel.

3. The assembly of claim 2 wherein said panel includes posts for aligning and attaching said liquid crystal display and said keyboard to said panel.

4. The assembly of claim 2 further comprising a bezel surrounding said liquid crystal display and said key pads, said panel including posts for aligning and attaching said bezel to said panel.

5. The assembly of claim 1 further comprising a printed circuit board attached to an other side of said panel, slots in said panel, and conductors extending through said slots for electrically connecting said liquid crystal display to said printed circuit board.

6. The assembly of claim 5 wherein said conductors comprise zebra strips, said slots holding and aligning said zebra strips with respect to said liquid crystal display and said printed circuit board.

7. The assembly of claim 1 wherein said liquid crystal display includes a top layer, a bottom layer formed by said panel, and liquid crystal material between said layers.

8. The assembly of claim 7 wherein deformities are provided on an other side of said panel opposite said first light emitting area to cause a portion of the conducted light to be emitted from said first light emitting area.

9. The assembly of claim 1 wherein said other display comprises key pads on said one side of said panel, said panel being made of a flexible material, whereby when said key pads are depressed, a portion of said panel moves correspondingly.

10. The assembly of claim 9 wherein said key pads are integrally molded on said panel.

11. The assembly of claim 9 further comprising a printed circuit board adjacent an other side of said panel having circuitry thereon which is actuated by depressing the respective key pads on said panel.

12. The assembly of claim 1 further comprising a conductive trace on said one side of said panel, and conductors for establishing electrical contact between one of said displays and said conductive trace.

13. The assembly of claim 1 further comprising a light source for supplying light to said end portion of said panel.

14. The assembly of claim 13 wherein said light source comprises one or more light emitting diodes embedded or potted in said panel.

15. The assembly of claim 1 further comprising a light source mounted in a recess, slot or cavity in said end portion of said panel.

16. The assembly of claim 1 wherein said panel includes an optical focus section adjacent said end portion of said panel containing a light source, and a light transition area intermediate said optical focus section and said end portion.

17. A display panel assembly comprising light conducting panel having opposite sides and an end portion containing a light source for providing light that is conducted through said panel, a first light emitting area on one of said sides from which a portion of the conducted light is emitted from said panel for backlighting a liquid crystal display overlying said first light emitting area, the remaining portion of the conducted light passing beneath said first light emitting area to other light emitting areas on said panel where additional light is emitted for lighting other displays associated with said other light emitting areas.

18. The assembly of claim 17 wherein said other displays comprise a plurality of key pads.

19. The assembly of claim 18 further comprising a conductive trace on said one side of said panel, and conductors for establishing electrical contact between said liquid crystal display or said key pads and said conductive trace.

20. The assembly of claim 17 further comprising a printed circuit board attached to an other side of said panel, said panel having slots for holding and aligning zebra strips with respect to said liquid crystal display and said printed circuit board, said zebra strips extending through said slots for establishing electrical contact between said liquid crystal display and said printed circuit board.

21. The assembly of claim 17 wherein said light source comprises a plurality of light emitting diodes embedded or potted in said end portion of said panel.

22. The assembly of claim 21 further comprising recesses, slots or cavities in said end portion containing said light emitting diodes, said recesses, slots or cavities being filled with a transparent medium to eliminate any air interface between said light emitting diodes and said panel.

23. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, and an other display associated with said other light emitting area, said assembly comprising a hand held instrument including a liquid crystal display as said first display and key pads as said other display.

24. The assembly of claim 23 wherein said hand held instrument comprises a cellular phone.

25. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, an other display associated with said other light emitting area, and a printed circuit board attached to an other side of said panel, said other display comprising key pads having portions extending through holes in said panel, said key pads when depressed causing contact with said printed circuit board to complete associated circuitry, said holes comprising said other light emitting area for causing light to be emitted around said key pads.

26. The assembly of claim 25 wherein said key pads are carried by a flexible panel which provides tactile feedback to said key pads causing said key pads to return to their original positions when released after being depressed.

27. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, an other display associated with said other light emitting area, a conductive trace on said one side of said panel, and conductors for establishing electrical contact between one of said displays and said conductive trace, said first display comprising a liquid crystal display and said other display comprising key pads, said conductors establishing electrical contact between said liquid crystal display or said key pads and said conductive trace.

28. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, an other display associated with said other light emitting area, and a light source mounted in a recess, slot or cavity in said end portion of said panel, said recess, slot or cavity being filled with a transparent medium to eliminate any air interface between said light source and said panel.

29. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, an other display associated with said other light emitting area, and a light source insert molded or cast within said end portion of said panel.

30. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, an other display associated with said other light emitting area, and a light source bonded to said end portion of said panel so as to eliminate any air interface between said light source and said panel.

31. The assembly of claim 30 further comprising a recess, slot or cavity in said end portion in which said light source is bonded.

32. A display panel assembly comprising a light conducting panel having opposite sides and an end portion for receiving light from one or more light sources for conduction through said panel, a first light emitting area on one of said sides through which a portion of the conducted light is emitted from said panel while the remaining portion of the conducted light passes beneath said first light emitting area to another light emitting area on said panel where additional light is emitted from said panel, a first display overlying said first light emitting area, and an other display associated with said other light emitting area, said panel including an optical focus section adjacent said end portion of said panel containing a light source, and a light transition area intermediate said optical focus section and said end portion, said light source being embedded or potted in said optical focus section to eliminate any air interface between said light source and said light transition area.

33. The assembly of claim 32 wherein said light source comprises a light emitting diode.

34. The assembly of claim 32 wherein said light source comprises a plurality of light emitting diodes.