<Electro-optical Characteristics Measurement>
Basic measurement conditions
(1) Driving voltage
HVDD = 15.5V, VVDD = 15.5V
VVC = 7.0V, Vcom = 6.6V
(2) Measurement temperature
25°C unless otherwise specified.
(3) Measurement point
One point in the center of the screen unless otherwise specified.
(4) Measurement systems
Two types of measurement system are used as shown below.
(5) Video input signal voltage (Vsig)
Vsig = 7.0 ± VAC [V] (VAC = signal amplitude)
∗ Measurement system I
LCX020BK
3.5mm
LCD panel
Luminance
Meter
Measurement
Equipment
Back light: color temperature 6800K ± 700K (25°C)
∗ Back light spectrum (reference) is listed on another page.
∗ Measurement system II
Light receptor lens
Optical fiber
Drive Circuit
LCD panel
Light Detector
Measurement
Equipment
Light Source
1. Contrast Ratio
Contrast Ratio (CR) is given by the following formula (1).
CR = L (White) ... (1)
L (Black)
L (White): Surface luminance of the TFT-LCD panel at the input signal amplitude VAC = 0.5V.
L (Black): Surface luminance of the panel at VAC = 4.5V.
Both luminosities are measured by System I.
– 12 –