ACX709AKM SONY [Sony Corporation], ACX709AKM Datasheet - Page 16

• Manufacturer Part Number: ACX709AKM
• Description: 7.60cm Reflective Color LCD Module
• Manufacturer: SONY [Sony Corporation]

[Separate Sheet 1: Linearity Measurement Method]
Definition of Linearity
Apply a DC 5V load between the X direction and Y direction electrodes of the transparent tablet as shown in
Fig. 1, and label the voltage between the pressed location and reference surface as the output voltage (Eox,
Eoy). Then, measure the output voltage when each intersection of the 10mm lattice enclosed by A and B which
are located only a certain distance inside the visible area is pressed as shown in Fig. 2.
Plot the output voltage for each measurement position as shown in Fig. 3, and label the difference between the
voltage value on the lattice enclosed by A and B and the output voltage at the same position as ( Ex, Ey).
Linearity is defined as the ratio between ( Ex, Ey) and the potential difference between A and B (EABx,
EABy).
X axis
Y axis
E
E
BX
AX
A
Measurement position
Transparent tablet linearity (X) = ( Ex/EABx)
Transparent tablet linearity (Y) = ( Ey/EABy)
Fig. 1
Transparent electrode
Measurement value
Ex
Bus bar
B
– 16 –
Fig. 3
5V
E
E
BY
AY
A
A
Measurement position
100%
100%
Measurement value
10mm
Fig. 2
Ey
10mm
ACX709AKM
B
B