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US 7,423,557 B2Granted
Key input device combined with key display unit and digital appliance having the same
AssigneeSamsung Electronics Co., Ltd.
InventorSang-woo Kang
Life of this patent
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Abstract
A key input device combined with a key display unit and a digital appliance having the same are disclosed. The key input device includes a key display unit for displaying a character or an image that identifies a key, a touch sensing unit that moves down and up by a pressure applied to this key, and a signal generation unit for generating an electric signal in accordance with the pressure applied to the key, wherein the character or the image displayed on the key display unit can be changed.
Claims22
A key input device comprising:
- a key display unit for displaying at least one of a character and an image that identifies a key;
- a touch sensing unit that senses touch according to pressure applied to the key identified by the key display unit;
- and
- a signal generation unit for generating an electric signal in accordance with the pressure applied to the key;
- wherein the at least one of a character and an image displayed on the key display unit can be changed;
- and
- further comprising a transparent or translucent protector for reducing the pressure applied to the key display unit to protect the key display unit, and projecting the at least one of a character and an image to be displayed on the key display unit;
- wherein the touch sensing unit is arranged within the transparent or translucent protector.
5 more elements
A digital appliance having a key input device comprising:
- a key display unit for displaying at least one of a character and an image that identifies a key;
- a touch sensing unit that senses pressure applied to the key identified by the key display unit;
- a signal generation unit for generating an electric signal in accordance with the pressure applied to the key;
- and
- a display control unit for changing the at least one of a character and an image displayed on the key display unit;
- further comprising a transparent or translucent protector for reducing the pressure applied to the key display unit to protect the key display unit, and projecting the character or image to be displayed on the key display unit;
- wherein the touch sensing unit is arranged within the transparent or translucent protector.
4 more elements
Dependencies are inferred from the claim text.