LV4138W Datasheet, PDF (5/26 Pages) Sanyo Semicon Device – Bi-CMOS LSI For LCD Panel Drive Single Chip IC

Continued from preceding page.
Parameter
Sub-brightness R change
rates
Sub-brightness B change
rates
Gain difference between RGB
signals
Sub-contrast R change rate
Sub-contrast B change rate
RGB inverted/non-inverted
gain difference
Black level potential difference
between RGB signals
Gamma gain
γ1 adjustment variable range
γ2 adjustment variable range
PCD transition time
RGB output whitelimiter level
RGB output black limiter
variable range
White limiter DC voltage
Symbol
SBBRTR
SBBRTB
ΔGRGB
SBCNTR
SBCNTB
ΔGINV
ΔVBL
GγL
GγM
GγH
Vγ1MN
Vγ1MX
Vγ2MN
Vγ2MX
tPCDH
tPCDL
VWL
VBLIMX
VBLIMN
VWLIM
LV4138W
Conditions
Enter SIG5 (VL = 0mV) to (A) and measure the
difference between the black level of TP45 output
when R-BRT = 128 and the black level of output
when R-BRT = 0 and R-BRT = 255.
Enter SIG5 (VL = 0mV) to (A) and measure the
difference between the black level of TP40 output
when B-BRT = 128 and the black level of output
when B-BRT = 0 and 255.
Determine the level difference of non-inverted
output amplitude (white to black) of TP40, TP43,
and TP45 when SIG4 is entered to (A).
Measure the non-inverted output (white to black) of
TP45 for the non-inverted output (white to black) of
TP43 when SIG4 is entered to (A) and when
R-CNT = 0 and R-CNT = 255.
Input SIG4 to (A) and measure the difference of
the level for B-CNT = 0 and 255 from the TP40
non-inverted output (white to black) when B-CNT =
128.
Determine the difference of inverted output
amplitude for the non-inverted output amplitude
(white to black) of TP40, TP43, and TP45 when
SIG4 is entered to (A).
Determine the difference between highest and
lowest black levels for inverted and non-inverted
outputs of TP40, TP43, and TP45 when SIG4 is
entered to (A).
Enter SIG8 to (A) and set the amplitude (black to
white) of non-inverted output of TP43 to 3.5Vp-p
with CONT and set the level to 1.5V through
BRIGHT adjustment.Measure VG1, VG2, and
VG3 and calculated as follows :
GγL = 20log (VG1/0.0357)
GγM = 20log (VG2/0.0357)
GγH = 20log (VG3/0.0357) (See Fig. 5)
Enter SIG8 to (A) and set the TP43 output (black to
black) to 9Vp-p through BRIGHT adjustment.
Read the γ gain change point at γ1 = 0, γ1 = 255 by
referring to the IRE level of input signal :
Vγ1MN for γ1 = 0
Vγ1MX for γ1 = 255
Enter SIG8 to (A) and set the TP43 output (black to
black) to 9Vp-p through BRIGHT adjustment.
Read the γ gain change point at γ2 = 0, γ2 = 255 by
referring to the IRE level of input signal :
Vγ1MN for γ2 = 0
Vγ1MX for γ2 = 255
Enter SIG4 to (A) and set the output amplitude of
TP38 to 9Vp-p. Measure tPCDH for rise and
tPCDL for fall. Load : 20000pF
Enter SIG3 to (A) and measure the amplitude of
the white side limiter level of inverted/non-inverted
TP43 output.
Enter SIG3 to (A) and measure the amplitude of
the black side limiter level of inverted/non-inverted
TP43 output. VBLIMX for BLIM = 255 and VBLIMN
for BLIM = 0
Enter SIG5 (VL = 0mV) to (A) and measure the DC
voltage of TP40, TP43, and TP45.
Ratings
Unit
min
typ
max
±1.3
±1.7
V
±1.3
±1.7
V
-0.6
0
0.6
dB
±2.0
dB
±2.0
dB
-0.5
0
0.5
dB
300
mV
23.0
26.0
29.0
dB
12.0
15.0
18.0
dB
18.0
22.0
26.0
dB
0 IRE
100
IRE
100
IRE
0 IRE
1.5
3
μs
1.5
3
μs
1.1
1.4
1.7 Vp-p
5.4
5.9
6.4 Vp-p
9.0
Vp-p
5.8
6.0
6.2
V
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