touch key products

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Touch Key Products

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Touchscreen Technology� Resistive

� Capacitive

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Why Touch?

� Reliable

� Sealed surface� Stylish

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Traditional Touchscreen

LCD Touch Panel Touch Function

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Winstar TouchKey

� Capacitive Sensing

� No touch panel required (lower cost)� 8 keys maximum for current samples

� Only icon type available now

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Capacitive Sensing

Touch FunctionTN/ STN LCD

Single-Layer ITO Double-Layer ITO

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Single-Layer v.s. Double-Layer

LargerSmallerTouch Area

HigherLowCost

Double-Layer ITOSingle-Layer ITO

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Winstar Touch Key 1

Electrical Characteristics

V3.63.53.4VLEDSupply voltage for B/L

mA225144129.6ILEDSupply LED current

mA53VDD=5VIDDSupply LCM current

V5.24.5VDDSupply voltage for logic

UNITMAX.TYPICAL

MIN.CONDITIONSYMBOLITEM

Size: 144.09X104.2X8.45(mm)

Single-Layer ITO

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Winstar Touch Key 2

Electrical Characteristics

Size: 143.97X104.14X8.3(mm)

Double-Layer ITO

V3.63.53.4VLEDSupply voltage for B/L

mA225144129.6ILEDSupply LED current

mA5 3VDD=5VIDDSupply LCM current

V5.24.5VDDSupply voltage for logic

UNITMAX.TYPICAL

MIN.CONDITIONSYMBOLITEM

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Winstar Touch Key 3

Electrical Characteristics

Size: 72.54X180.16X7.11(mm)

Double-Layer ITO

V3.63.53.4VLEDSupply voltage for B/L

mA1258072ILEDSupply LED current

mA53VDD=5VIDDSupply LCM current

V5.24.5VDDSupply voltage for logic

UNITMAX.TYPICALMIN.CONDITIONSYMBOLITEM

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Theory of Operation

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Sensitivity

� Different environment might require different sensitivity

� Sensitivity is adjustable in software

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Applications

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