Conditionally illuminated keypad legends
First Claim
Patent Images
1. A user input device, comprising:
- at least a first light source operable to illuminate at least at a first intensity level of illumination and operable to illuminate at a second intensity level of illumination;
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 at the first intensity level of illumination and to indicate an inactive one of the other alternative input values of the user selectable switch at the second intensity level of illumination, the second intensity level being different than the first intensity level.
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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.
56 Citations
24 Claims
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1. A user input device, comprising:
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at least a first light source operable to illuminate at least at a first intensity level of illumination and operable to illuminate at a second intensity level of illumination; 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 at the first intensity level of illumination and to indicate an inactive one of the other alternative input values of the user selectable switch at the second intensity level of illumination, the second intensity level being different than the first intensity level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. 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:
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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; 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 and illuminating the first legend of each of the number of user selectable switches at a first intensity level of illumination; and in further response to the first user input, inactivating the respective second one of the alternative input values for each of the number of user selectable switches and illuminating the second legend of each of the number of user selectable switches at a second intensity level of illumination, the second intensity level being different than the first intensity level. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification