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US 2004/0201568 A1Published application
Conditionally illuminated keypad legends
AssigneeIntermec IP Corp.
InventorTimothy J. Dowd
Life of this patent
Estimating the term…
Abstract
A user input device employs a number of legends that are selectively illuminable to indicate an active one of alternative input values of a user selectable key.
Claims24
A user input device, comprising:
- at least a first light source;
- a plurality of user selectable switches, at least a number of the user selectable switches selectively operable to input at least two alternative input values;
- and
- for each of the number of the user selectable switches, at least a first and a second legend proximate the user selectable switch, each of the first and the second legends identifying a respective one of the alternative input values of the user selectable switch, the legends selectively illuminable to indicate an active one of the alternative input values of the user selectable switch.
1 more element
A method of operating a user input device having a number of user selectable switches, wherein each of the number of user selectable switches is selectively operable to input at least two alternative input values, has at least a first and a second legend identifying a respective one of the alternative input values, and is selectively illuminable to indicate an active one of the alternative input values, the method comprising:
- receiving a first user input to activate a respective first one of the alternative input values for each of the number of user selectable switches;
- and
- in response to the first user input, activating the respective first one of the alternative input values for each of the number of user selectable switches in response to the first user input and illuminating the first legend of each of the number of user selectable switches at a first intensity level.
Dependencies are inferred from the claim text.