ACX306AK
2. Optical Transmittance of Panel
Optical transmittance (T) is given by the following formula.
T = L (White)/Luminance of Backlight × 100 [%]
3. Chromaticity
Chromaticity of the panels is measured by System I. Raster modes of each color are defined by the
representations at the input signal amplitude conditions shown in the table below. System I uses x and y of
the CIE standards as the chromaticity here.
Signal amplitudes (VAC) supplied to each input
R input
0.5
G input
4.0
B input
4.0
R
G
B
4.0
0.5
4.0
Raster
4.0
4.0
0.5
0.0
W
0.0
0.0
(Unit: V)
4. V-T Characteristics
V-T characteristics, or the relationship between signal
amplitude and the transmittance of the panel, are
measured by System II by inputting the same signal
amplitude VAC to each input pin. V90, V50, and V10
correspond to the voltages which define 90%, 50%,
and 10% of transmittance respectively.
90
50
10
V90 V50 V10
VAC – Signal amplitude [V]
5. Half Tone Color Reproduction Range
The half tone color reproduction range of LCD panels
is characterized by the differences between the V-T
characteristics of R, G and B. The differences of these
V-T characteristics are measured by System II.
System II defines signal voltages of each R, G and B
raster mode which correspond to 50% of transmittance,
V50R, V50G and V50B, respectively. V50RG and V50BG,
that is to say the differences between V50R and V50G
and between V50B and V50G, are given by the following
formulas respectively.
100
50
0
V50RG
V50BG
G raster
B raster
R raster
V50R V50B
V50G
VAC – Signal amplitude [V]
V50RG = V50R – V50G
V50BG = V50B – V50G
– 15 –
SONY [ SONY CORPORATION ]
