LV4124W Datasheet, PDF (5/21 Pages) Sanyo Semicon Device – Single-chip LCD panel driver IC(Supports the ALP202 LCD panel)

LV4124W
Continued from preceding page
Parameter
Symbol
Conditions
[Chrominance Signal System]
Color adjustment
characteristics (maximum)
Color adjustment
characteristics (minimum)
GCOLMX
GCOLMN
Input SIG5 (VL = 150 mV) to (A), and input SIG2 (0 dB,
burst/chrominance phase = 180°) to (B).
Let V0, V1, and V2 be the chrominance signal amplitude
when COL = 128, COL = 255, and COL = 0, respectively.
Calculate GCOLMX = 20log (V1/V0), and GCOLMN = 20log
(V2/V0).
Ratings
min
typ
+4
+6
–20
Unit
max
dB
–15
dB
Tint adjustment range
(maximum)
TNTMX
Input SIG5 (VL = 150 mV) to (A), and input SIG2 (0 dB, with
a variable burst/chrominance phase) to (B).
–30
–40
deg
Let θ 0, θ 1, and θ 2 be the phases when the T41 output
amplitude is minimum when TINT = 128, TINT = 255, and
Tint adjustment range
(minimum)
TNTMN
TINT = 0, respectively.
Calculate TNTMX = θ1 – θ0, and TNTMN = θ2 – θ0.
30
40
deg
Killer operating input level
ACKN
ACKP
Input SIG5 (VL = 150 mV) to (A), and to (B),
input SIG2 (with a variable level,
burst/chrominance phase = 180°, and also
burst/chrominance phase = ±135°).
Measure the T41 output amplitude.
Gradually lower the SIG3 level (amplitude) until
the killer function operates and measure that
level.
NTSC
PAL
–36
30
dB
–33
–27
dB
Demodulator output
amplitude ra io (NTSC)
VRBN
VGBN
Input SIG5 (VL = 150 mV) to (A), and input SIG3 (0 dB) to
(B).
Modify the chrominance signal phase, let VB be the
maximum amplitude of the T41 chrominance demodulated
signal, let VG be the maximum amplitude of the T44
chrominance demodulated signal, and let VR be the
maximum amplitude of the T46 chrominance demodulated
signal
Calculate VRBN = VR/VB and VGBN = VG/VB.
0.53
0.63
0.73
–
0.25
0.32
0.39
–
Input SIG5 (VL = 150 mV) to (A), and input SIG3 (0 dB) to
θ RBN
(B).
Modify the chrominance signal phase, let θ B be the phase
99
109
119 deg
Demodulator output phase
difference (NTSC)
at the maximum amplitude of the T41 chrominance
demodulated signal, let θ G be the phase at the maximum
amplitude of the T44 chrominance demodulated signal, and
θ GBN
let θ R be the phase at the maximum amplitude of the T46
chrominance demodulated signal.
230
242
254 deg
Calculate θ RBN = θ R – θ B and θ GBN = θ G – θ B.
Demodulator output
amplitude ra io (PAL)
VRBP
VGBP
Input SIG5 (VL = 150 mV) to (A), and input SIG3 (0 dB) to
(B).
Modify the chrominance signal phase, let VB be the
maximum amplitude of the T41 chrominance demodulated
signal, let VG be the maximum amplitude of the T44
chrominance demodulated signal, and let VR be he
maximum amplitude of the T46 chrominance demodulated
signal
Calculate VRBP = VR/VB and VGBP = VG/VB.
0.65
0.75
0.85
–
0.33
0.40
0.47
–
Input SIG5 (VL = 150 mV) to (A), and input SIG3 (0 dB) to
(B).
θ RBP _{Modify the chrominance signal phase, let θ B be the phase}
80
90
100 deg
Demodulator output phase
difference (PAL)
at the maximum amplitude of the T41 chrominance
demodulated signal, let θ G be the phase at the maximum
amplitude of the T44 chrominance demodulated signal, and
θ GBP
let θ R be the phase at the maximum amplitude of the T46
chrominance demodulated signal.
232
244
256 deg
Calculate θ RBP = θ R – θ B and θ GBP = θ G – θ B.
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