LCX024AKB
<Electro-optical Characteristics Measurement>
Basic measurement conditions
(1) Driving voltage
VDD = 13.5V
VVC = 6.0V, VCOM = 5.7V
(2) Measurement temperature
25°C unless otherwise specified.
(3) Measurement point
One point in the center of screen unless otherwise specified.
(4) Measurement systems
Two types of measurement system are used as shown below.
(5) RGB input signal voltage (Vsig)
Vsig = 6.0 ± VAC [V] (VAC: signal amplitude)
∗ Measurement system I
3.5mm
Luminance
Meter
Measurement
Equipment
LCD panel
∗ Measurement system II
Light receptor lens
Back light: color temperature 6500K, +0.004uV (25°C)
∗ Back light spectrum (reference) is listed on another page.
Optical fiber
Light Detector
Measurement
Equipment
Drive Circuit
LCD panel
Light Source
1. Contrast Ratio
Contrast Ratio (CR4.0) is given by the following formula (1).
L4.0 (White)
CR4.0 = L4.0 (Black) ...(1)
L4.0 (White): Surface luminance of the TFT-LCD panel at VDD = 12.0V, VVC = 6.0V, VCOM = 5.7V and the
RGB signal amplitude VAC = 0.5V.
L4.0 (Black): Surface luminance of the panel at VAC = 4.0V.
Contrast Ratio (CR4.5) is given by the following formula (2).
CR4.5 =
L4.5 (White)
L4.5 (Black)
...(2)
L4.5 (White): Surface luminance of the TFT-LCD panel at the RGB signal amplitude VAC = 0.5V.
L4.5 (Black): Surface luminance of the panel at VAC = 4.5V.
The above luminosities are measured by System I.
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