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Color Liquid Crystal Display Controller
LH75400/01/10/11 (Preliminary) User’s Guide
13-34
7/15/03
Figure 13-5. TFT Vertical Timing Diagram
VDD
See
Note 2
DISPLA
Y
-DEPENDENT
TURN-ON DELA
Y
1 TFT
FRAME
P
ANEL POSITIVE HIGH-V
OL
T
A
GE SUPPL
Y A
CTIVE
P
ANEL NEGA
TIVE HIGH-V
OL
T
A
GE SUPPL
Y A
CTIVE
P
ANEL LOGIC A
CTIVE
P
ANEL D
A
T
A
CLOCK A
CTIVE
D
A
T
A
ENABLE
BA
CK PORCH
ENUMERA
TED IN
HORIZONT
AL 'LINES'
SEE 'TFT HORIZONT
AL
TIMING DIA
GRAM'
ENUMERA
TED IN
HORIZONT
AL 'LINES'
FR
ONT PORCH
ALL 'LINES' FOR ONE FRAME
VSS
LCD
VDDEN
(DIGIT
AL SUPPL
Y
ENABLE)
LCDDCLK
(P
ANEL CLOCK)
Timing2:PCD
Timing2:
BCD
Timing2:
IPC
LCDEN
(D
A
T
A
ENABLE)
Timing2:A
CB
Timing2:
IOE
LCDFP
(VER
TICAL
SYNCHR
ONIZA
TION
PULSE)
Timing1:
IVS
PIXEL D
A
T
A
AND
HORIZONT
AL
CONTR
OL
SIGNALS FOR
ONE FRAME
NO
TES:
1.
Signal polar
ties ma
y v
a
ry
f
or some displa
ys
.
2.
The use of LCDDSPLEN f
or high-v
oltage po
w
er control is optional on some
TFT panels
.
DISPLA
Y
DEPENDENT
TURN-OFF DELA
Y
Timing1:
VBP
Timing1:
LPP
Timing1:
VFP
Timing1:
VSW
LH754xx-78