Keypad structure
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United States of America Patent
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Jun 19, 2012
Grant Date -
Sep 15, 2011
app pub date -
Jul 13, 2010
filing date -
Mar 15, 2010
priority date (Note) -
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Abstract
A keypad structure with a backlight source includes a base, a light guiding plate, a thin film circuit board, a resilient component, a keycap, and an elevating mechanism. The thin film circuit board includes at least one exhausting notch for increasing exhaust as the resilient component is compressed. A plurality of microstructures is formed on the light guiding plate, and the keypad structure further includes a transparent layer formed on the keycap. Light emitted from the backlight source and refracted by the plurality of microstructures passes through the keycap and the transparent layer as the backlight source lights the lateral side of the light guiding plate, so as to illuminate the transparent layer. Thus, the present invention has advantages of illuminating pattern, regional illumination, and preferable comfort.
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