Sharp PN-L803C

PN-L803C/80TC3 HARDWARE DESCRIPTIONS 8 - 5
2. CAPACITANCE TOUCH PANEL THEORY BASIS
2-1. Capacitance change basis
Typical sensor pattern Equivalence circuit
[Capacitance change outline]
2-2. Drive system (Sharp original: The multiple drive system)
・Multiple lines are driven at the same time.
[Image of the drive system]
[Configuration]
Extract the touch position, size,
strength, etc, after reading the
capacity distribution.
The capacity is changed with
coming near the touch panel.
Metal mesh wiring
Activates the multiple lines at the same time and reads the signal one
b
y
one from mixed multi
p
le lines b
y
the arithmetic
p
rocessin
g
.
Sensor sheet
Read Q=Cf.V as the signal.
Touch sensor
Touch controlle
r