Keypad assembly
First Claim
Patent Images
1. A keypad assembly comprising:
- a main board having at least one metal dome disposed on a predetermined position of the main board; and
a keypad disposed on the main board, for applying a pressure on the at least one metal dome and being used as a touchpad according to a mode selection,wherein the keypad includes;
a keytop layer having at least one keytop on which a plurality of predetermined alphanumeric characters is stamped;
a touchpad layer disposed under the keytop layer;
a base layer disposed under the touchpad layer, the base layer having at least one protrusion protruding from a bottom surface of the base layer at a position corresponding to the at least one metal dome; and
a backlight Electro-Luminescence (EL) sheet interposed between the base layer and the touchpad layer to provide light to the at least one keytop and a barrier film provided to prevent interference between the backlight EL sheet and the touchpad layer.
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Abstract
Provided is a keypad assembly used as a data input unit in various electronic devices. The keypad assembly includes a main board having one or more metal domes formed at predetermined positions on the main board, and a keypad disposed on the main board to apply a pressure on the metal dome and to be used as a touchpad according to a mode selection, the keypad includes a keytop layer having one or more keytops on which corresponding alphanumeric characters are formed, a touchpad layer disposed under the keytop layer; and a base layer disposed under the touchpad layer, and having one or more protrusions protruding from its bottom surface at the positions corresponding to the metal dome.
33 Citations
16 Claims
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1. A keypad assembly comprising:
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a main board having at least one metal dome disposed on a predetermined position of the main board; and a keypad disposed on the main board, for applying a pressure on the at least one metal dome and being used as a touchpad according to a mode selection, wherein the keypad includes; a keytop layer having at least one keytop on which a plurality of predetermined alphanumeric characters is stamped; a touchpad layer disposed under the keytop layer; a base layer disposed under the touchpad layer, the base layer having at least one protrusion protruding from a bottom surface of the base layer at a position corresponding to the at least one metal dome; and a backlight Electro-Luminescence (EL) sheet interposed between the base layer and the touchpad layer to provide light to the at least one keytop and a barrier film provided to prevent interference between the backlight EL sheet and the touchpad layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification