LV4149W Datasheet, PDF (4/26 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
Symbol
SBBRTR
SBBRTB
ΔGRGB
SBCNTR
SBCNTB
ΔGINV
LV4149W
Conditions
Measure the change amount of TP45 output black
level when SIG2 is entered in (A) and COMW is
changed from 128 to 255 and that of TP45 output
white level change amount when COMW is
changed from 128 to 0.
Measure the change amount of TP40 output black
level when SIG2 is entered in (A) and COMW is
changed from 128 to 255 and that of TP45 output
white level when COMW is changed from 128 to 0.
Determine the level difference of non-inverted
output amplitude (white to black) of TP40, TP43,
and TP45 when SIG3 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 SIG3 is entered to (A) and when
R-CNT = 0 and R-CNT = 255.
Measure the non-inverted output (white to black) of
TP40 for the non-inverted output (white to black) of
TP43 when SIG3 is entered to (A) and when
B-CNT = 0 and B-CNT = 255.
Determine the difference of inverted output
amplitude for the non-inverted output amplitude
(white to black) of TP40, TP43, and TP45 when
SIG3 is entered to (A).
[RGB signal system]
Parameter
Black level potential difference
between RGB signals
Gamma gain
γ1 adjustment variable range
γ2 adjustment variable range
Antipole transition time
RGB output black limiter
variablerange
RGB output white limiter
variablerange
Symbol
ΔVBL
GγL
GγM
GγH
Vγ1MN
Vγ1MX
Vγ2MN
Vγ2MX
tCOMH
tCOML
VBLIMN
VBLIMX
VWLIMN
VWLIMX
Conditions
Determine the difference between highest and
lowest black levels for inverted and non-inverted
outputs of TP40, TP43, and TP45 when SIG3 is
entered to (A).
Enter SIG7 into (A) and set the non-inverted output
amplitude (black and white) of TP43 at γ1 = 120, γ2
= 0 to 2.7Vp-p with CONT. Adjust the amplitude
(black and white) to 3.5Vp-p with γ2 and the black
level to 1.5V with BRT. Measure VG1, VG2 and
VG3 and calculate as follows :
GγL = 20log (VG1/0.0357)
GγM = 20log (VG2/0.0357)
GγH = 20log (VG3/0.0357)
(See Fig. 4.)
Enter SIG7 to (A) and set the TP43 output (black to
black) to 3Vp-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 SIG7 to (A) and set the TP43 output (black to
black) to 3Vp-p through BRIGHT adjustment.
Read the γ gain change point at γ2 = 0, γ2 = 255 by
referring to the IRE level of input signal :
Vγ2MN for γ2 = 0 Vγ2MX for γ2 = 255
Enter SIG3 to (A) and set the output amplitude of
TP38 to 3Vp-p. Measure tCOMH for rise and
tCOML for fall. Load : 1000pF
Enter SIG2 to (A) and measure the amplitude of
the black side limiter of inverted/non-inverted
TP38, 40, 43 and 45 output.
Enter SIG2 to (A) and measure the amplitude of
the white side limiter of inverted/non-inverted
TP38, 40, 43 and 45 output.
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
Ratings
Unit
min
typ
max
300
mV
23
26
29
dB
12
15
18
dB
23
26
29
dB
0 IRE
100
IRE
100
IRE
0 IRE
1
1.5
μs
1
1.5
μs
4.5
Vp-p
2 Vp-p
4
Vp-p
2.2 Vp-p
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