input output

Question 1

TOUCH SCREENS

Answer 1

interactive device that combines a lcd with touch senseors, to varying degreess.

Question 2

INFRA RED - heat

Answer 2

uses galss as material

needs a warm object to carry out the input opperation

Question 3

INFRA RED - optical

Answer 3

uses glass

uses and array of snesors to form a grid which detects inputs by breaking beams.

Question 4

PROS AND CONS OF INFRA RED

Answer 4

multi touch capable. 
any type of glove or hand for optical 
good screen durability  
dis: 
expensive 
bare hands only for heat 
screen visiblity.