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US 7,064,288 B2Granted
Metal dome sheet in mobile communication terminal and keypad thereof
AssigneeLG Electronics Inc.
InventorSang Eun Nam
Life of this patent
Estimating the term…
Abstract
A keypad for a mobile communication terminal is provided. The keypad includes a sheet having contacts which deflect so as to switch contact point pairs on a printed circuit board on and off. The contacts may be formed as hemispherical domes to facilitate use. The sheet may also include band parts covering the contacts and an insulting sheet having at least one pair of semicircular openings which expose portions of the contacts. The insulating sheet is preferably made of a light-reflecting material/color which disperses light to illuminate keys of the keypad.
Claims18
A keypad, comprising:
- a printed circuit board including at least one contact point;
- at least one contact corresponding to the at least one contact point;
- and
- a sheet at least partially covering the at least one contact so as to allow light to diffuse through an opening portion formed in the sheet.
1 more element
A keypad, comprising:
- at least one key switch;
- and
- at least one contact structure adjacent the key switch, wherein the contact structure comprises:
- at least one contact;
- and
- a light diffusing layer configured to at least partially cover the at least one contact.
3 more elements
Dependencies are inferred from the claim text.