Light guide for illuminating a dial

An illumination arrangement for a dial of a timekeeping device, the illumination arrangement comprising:

• a lightguide having a first portion with a bottom surface and an upper surface in facing alignment with the dial, a lightpipe integrally formed with and extending below the bottom surface, the lightpipe having at least one foot region at one end of the lightpipe, and geometries molded into the bottom surface of the first portion to selectively eject internally reflected light from the bottom surface of the first portion through the upper surface;
• the dial to be illuminated disposed above the lightguide, the dial comprising a light transmissive member having a periphery substantially coextensive with that of the lightguide and having a bottom surface in facing alignment with the upper surface of the lightguide;
• and
• a concentrated light source disposed below and spaced apart from the at least one foot region of the lightguide;
• wherein the lightguide provides at least essentially uniform illumination to the dial when the concentrated light source conducts light to the lightpipe;
• and
• wherein the dial includes an absorption pattern on the bottom surface thereof, the absorption pattern for reducing the visible intensity of light emanating from the concentrated light source.

An illumination arrangement for a dial of a timekeeping device, the illumination arrangement comprising:

• a lightguide having a first portion with a bottom surface and an upper surface in facing alignment with the dial, a lightpipe integrally formed with and extending below the bottom surface, the lightpipe having at least one foot region at one end of the lightpipe, and geometries molded into the bottom surface of the first portion to selectively eject internally reflected light from the bottom surface of the first portion through the upper surface;
• the dial to be illuminated disposed above the lightguide, the dial comprising a light transmissive member having a periphery substantially coextensive with that of the lightguide and having a bottom surface in facing alignment with the upper surface of the lightguide;
• a layer consisting of paper disposed in facing alignment with the bottom surface of the lightguide;
• and
• a concentrated light source disposed below and spaced apart from the at least one foot region of the lightguide;
• and
• wherein the lightguide provides at least essentially uniform illumination to the dial when the concentrated light source conducts light to the lightpipe.

An illumination arrangement for a dial of a timekeeping device, the illumination arrangement comprising:

• a lightguide having a first portion with a bottom surface and an upper surface in facing alignment with the dial, a lightpipe integrally formed with and extending below the bottom surface, the lightpipe having at least one foot region at one end of the lightpipe, and geometries molded into the bottom surface of the first portion to selectively eject internally reflected light from the bottom surface of the first portion through the upper surface;
• the dial to be illuminated disposed above the lightguide, the dial comprising a light transmissive member having a periphery substantially coextensive with that of the lightguide and having a bottom surface in facing alignment with the upper surface of the lightguide;
• and
• a concentrated light source disposed below and spaced apart from the at least one foot region of the lightguide;
• wherein the lightguide includes outer edges around the periphery having paint thereon for reducing the amount of light exiting the outer edges of the lightguide thereby causing more light to exit the upper surface of the lightguide.