Akai LCT3201ad Service Manual page 69

*7) Definition of Cross talk Ratio
CMR = MAX ( ( | ( LB1-LA ) / LC | ) × 100
LA: Pattern A (Half-Tone pattern) Measure point Luminance
LB1, LB2: Pattern B1, Pattern B2 Measure point Luminance
LC: Pattern C (white pattern) Measure point Luminance
Pattern A
Gray 127
*8) Definition of Color Gamut:
To measure RGB three sub-pixels color gamut coordinate at CIE coordinate chart from the
center of module, to form a triangle area = A
RGB three sub-pixels of NTSC at CIE coordinate chart to form a triangle area = N
*9) Definition of Central luminance:
After lighting on the panel for 30 mins, then the Central luminance test proceeded.
The definiton of TYP value is under status of Inverter Dimming Voltage=5V.
Pattern B1
Gray 127
(341,192)
(171,384)
(683,672)
Pattern B2
(0,0)
Gray127
Figure 8-6. The Pattern of Cross talk Test
A
CG =
N
﹪
, ( | (LB2 – LA ) / LC | ) × 100
(683,96)
Black (1195,384)
(1024,576)
White measurement point
(1366,768)
.
RGB
RGB
× 100
RGB
68
)
﹪
Pattern C
White
.
RGB