User interface with means for light bleed mitigation
A light-transmissive substrate includes an arrangement of penetrations extending from one surface of the substrate toward another surface of the substrate. The penetrations are configured to attenuate or inhibit transmission of light through the substrate from one side of the arrangement of penetrations to the other side of the arrangement of penetrations.
1. An apparatus comprising:
a light-transmissive substrate having a first surface and a second surface,
said first surface including a first defined area configured to allow admission of light into said substrate and
said second surface including a first corresponding defined area configured to allow said light to emanate from said substrate,
said substrate defining a plurality of perforations extending from said first surface to said second surface, said plurality of perforations configured to inhibit direct transmission of light admitted to said substrate through said first defined area to an area of said front surface outside said first corresponding defined area;
wherein said plurality of perforations comprises a first tier of perforations having a first diameter, a second tier of perforations having a second diameter larger than said first diameter, and a third tier of perforations having a third diameter larger than said second diameter.
2. The apparatus of claim 1 wherein each of said perforations includes a side wall, said side walls coated with a reflective coating.
3. The apparatus of claim 1 further comprising a light source associated with said first surface such that light emanating from said light source is admitted to said substrate only through said first defined area and transmitted through said substrate to said first corresponding defined area.
4. The apparatus of claim 3 further comprising a light guide associated with said substrate and said light source, said light guide directing said light from said light source to said first defined area.
5. The apparatus of claim 1 wherein said substrate is a printed wiring board.
6. The apparatus of claim 1 further comprising at least one touch switch operably associated with said first corresponding defined area.
7. The apparatus of claim 1 wherein said third tier of perforations is arranged between said first and second tiers of perforations.
8. The apparatus of claim 7 wherein said first, second, and third tiers are arranged in respective rows.
9. The apparatus of claim 1 further comprising indicia associated with said first corresponding defined area.
10. The apparatus of claim 9 wherein said indicia is illuminated by said light.
11. The apparatus of claim 1 wherein said plurality of penetrations is arranged to at least partially surround said first corresponding defined area.
12. The apparatus of claim 1 further comprising:
a second light source associated with said first surface such that light emanating from said light source is admitted to said substrate through a second defined area of said first surface and transmitted through said substrate to a second corresponding defined area of said front surface;
wherein said plurality of perforations inhibits direct transmission of light through said substrate from said first defined area to said second corresponding defined area and from said second defined area to said first corresponding defined area.
13. The apparatus of claim 1 further comprising a second substrate overlying said second surface of said substrate.
14. An apparatus comprising:
a light-transmissive substrate having a rear surface and a front surface,
said rear surface including a first defined area configured to allow admission of light into said substrate and
said front surface including a first corresponding defined area configured to allow said light to emanate from said substrate,
said substrate defining a plurality of cavities extending from one of said front and rear surfaces toward the other of said front and rear surfaces, said plurality of cavities configured to attenuate transmission of light admitted to said substrate through said first defined area of said rear surface to an area of said front surface outside said first corresponding defined area;
wherein said plurality of cavities comprises a first tier of cavities having a first diameter, a second tier of cavities having a second diameter larger than said first diameter, and a third tier of cavities having a third diameter larger than said second diameter.
15. The apparatus of claim 14 wherein each of said cavities includes a side wall, said side walls coated with a reflective coating.
16. The apparatus of claim 14 further comprising a light source associated with said first surface such that light emanating from said light source is admitted to said substrate only through said first defined area and transmitted through said substrate to said first corresponding defined area.
17. The apparatus of claim 16 further comprising a light guide associated with said substrate and said light source, said light guide directing said light from said light source to said first defined area.