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Resistive Touch Screen (Option)
Ge ne ral
The re sis ti ve TFT Touch Screen is con struc ted of a hard-coa ted po ly es ter
tops heet that is over laid on a con duc ti ve ly-coa ted glass lay er. Vol ta ge is
ap plied to the tops heet. As the user tou ches the screen, the tops heet
com pres ses into con tact with the glass lay er, and cur rent flows to the four
cor ners in pro por ti on to the dis tan ce from the edge. The con trol ler then
cal cu la tes the po si ti on of the fin ger or sty lus, ba sed on the cur rent flow.
Be cau se the con trol ler de ri ves both the “X” and “Y” touch coor di na tes from
the sta ble glass lay er, the ac cu ra cy and ope ra ti on of the touch screen is
unaf fec ted by damage to the topsheet caused by extended use or neglect.
Con struc ti on of the re sis ti ve Touch Screen
When you connect your new BA72A-2 to your BEETLE for the first time you
have to calibrate the Touch Screen. Details depend on the operating system
that you are using.
How to Ope ra te
Tou ching the touch screen has the same ef fect as cli cking the left mou se
but ton. You only need to ap ply a litt le pres su re with the fin ger tip. In this
re sis ti ve pro cess not only fin ger tip con tact is re cog ni zed. The screen does
re act in any way if tou ched, for ex am ple, with a sty lus. The re com men ded
ma te ri al for a sty lus
is po lya ce tal. The sty lus should have a mi ni mum
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RESISTIVE TOUCH SCREEN (OPTION)
Hard-coa ted po ly es ter
Glass sub stra te with spa cer
Adhesive