LV4124W Datasheet, PDF (3/21 Pages) Sanyo Semicon Device – Single-chip LCD panel driver IC(Supports the ALP202 LCD panel)

LV4124W
AC Characteristics (1) when the T41, T44, and T46 outputs are measured at the noninverted outputs.
Parameter
Symbol
Conditions
[Luminance Signal System]
Contrast characteristics (typ.)
GCNTTP
Input SIG4 to (A) and measure the ratio of the T44 output
amplitude (white - black) to the input amplitude.
Contrast characteristics (min.)
GCNTMN
Input SIG4 to (A) and measure the ratio of the T44 output
amplitude (white - black) to the input amplitude.
Maximum video gain
GV
Input SIG4 to (A) and measure the ratio of the T44 output
amplitude (white - black) to the input amplitude.
[Luminance Signal Frequency Characteristics]
Ratings
Unit
min
typ
max
13
17
21
dB
–9
–5
–1
dB
19
22
25
dB
Y/C input
Composite input
NTSC
PAL
FCYYC
FCYCMN
FCYCMP
Take the T44 output amplitude with SIG7 (0 dB, no burst,
100 kHz) input to (A) as 0 dB. Modify the input frequency
and determine he frequency such that the output is down
–3 dB.
5.0
2.5
2.5
MHz
Image quality adjustment
range 1 (Y/C input)
GSHP1X
GSHP1N
Take the T44 output amplitude with SIG7
(100 kHz) input to (A) as 0 dB. Determine
the ratio of the output amplitude with a
2.5-MHz SIG7 input.
MAX
MIN
12
16
0
dB
2
Image quality adjustment
range 3 (composite input)
GSHP3X
GSHP3N
Take the T44 output amplitude with SIG7
(100 kHz) input to (A) as 0 dB. Determine the
ratio of the output amplitude with a 2.0-MHz
SIG7 input.
MAX
MIN
6
10
–2
dB
3
Chrominance signal leakage
CRLEKY
Input SIG2 (0 dB) to (A) and using a spectrum analyzer,
measure the 3.58 and 4.43 MHz components in the input and
in T44. Let ∆CLK be that difference. Use that value to
determine CRLEKY from the following formula:
CRLEKY = 150 mV × 10^∆CLK/20
30 mV
[Luminance Signal Input to Output Delay]
Y/C input
Composite input
NTSC
PAL
TDYYC
TDYCMN
TDYCMP
Input SIG5 (VL = 150 mV) to (A).Measure the delay time
between a rising edge in the input and the corresponding
rising edge in the T44 noninverted output.
[Color Difference Signal System]
250
350
450
ns
500
600
700
ns
500
600
700
ns
Color difference input color
adjustment
GEXCMX
GEXCMN
Input SIG5 (VL = 150 mV) to (A) and SIG1 (0 dB, 100 kHz,
no burst) to (D). Let VC0 be the T41 output amplitude
(100 kHz) when COL = 128. Let VC2 be the T41 output
amplitude (100 kHz) when COL = 0. Let VC1 be the T41
output amplitude (100 kHz) when SIG1 is set to -10 dB and
COL = 255. Then calculate the following formulas.
GEXCMX = 20log (VC1/VC0) +10
GEXCMN = 20log (VC2/VC0)
+4
+6
dB
–15
–11
dB
Input SIG5 (VL = 150 mV) to (A) and SIG1 (0 dB, 100 kHz,
no burst) to (D) and (E).
Color difference balance
VEXCBL Let VB be the T41 output amplitude (100 kHz), and let VR
0.85
be he T46 output amplitude (100 kHz).
Calculate VEXCBL = VR/VB.
1
1.15
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