LIGHTING METHOD AND DEVICE FOR DATA INPUT DEVICE

PURPOSE: A lighting method and a device for data input device is provided to improve accuracy of lighting at each button and to give a tactile feedback. CONSTITUTION: A keypad(148) includes a button(150) illuminated by an electroluminescent(EL) lighting panel(142) located below the keypad. The panel...

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Bibliographic Details
Main Authors OH SANG Y, CONNELL NATHAN M, LARSON KAREN C
Format Patent
LanguageEnglish
Korean
Published 15.06.2001
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
TELEPHONIC COMMUNICATION
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Summary:PURPOSE: A lighting method and a device for data input device is provided to improve accuracy of lighting at each button and to give a tactile feedback. CONSTITUTION: A keypad(148) includes a button(150) illuminated by an electroluminescent(EL) lighting panel(142) located below the keypad. The panel is selectively illuminated and corresponds directly to each button of the keypad. A dome switch(136) is engagable by an actuator(158) of the button and is located below the panel to provide tactile feedback to a user. A tab, which comprises an arc formed by a void in the panel, is located between the actuator and the dome switch and corresponds to the location of the button. The void allows the tab to move freely in a vertical direction as the button activates the dome switch. A circuitry layer located directly below the dome switch comprises switch circuitry activated therefrom. The keypad may include audio circuitry to generate an audible user feedback tone of a unique sound corresponding to the particular function of a depressed dome switch.
Bibliography:Application Number: KR20000057404