HD66781 Datasheet, PDF (188/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Power-supply/display ON (LPTS = 1: LTPS TFT panel, with HD667P21)
Preliminary
Power supply ON Sequence
Power supply ON
(Vcc, IOVcc, Vcc1, Vci)
The power-suppy must be turned on
in the order of IOVcc, Vcc1(781),
Vcc(7P21), Vcc(781), Vci or
all power-supplies must be turned on
simultaneously.
Power ON reset
1ms
or more
VDD startup
oscillation
start
Instructions before
power supply startup
Power-supply control register settings
(HD667P21)
VC, VRH, (PON = 0) settings
serial transfer
VCM, VDVsettings
serial transfer
VGH, VGL settings
serial transfer
DK[1:0] = 2'h1 setting
serial transfer
30ms
or more
Instructions for starting
up power supply(1)
Power-supply operation start setting
(HD66781)
AP setting
(HD667P21)
AP, DC, BT settings
(VCOMG = 0, GON = 0) setting
serial transfer
PON = 1 setting
serial transfer
VLOUT2, VLOUT3
start up
Instructions for starting
Power supply(2)
Power-supply operation start setting
(HD667P21)
DK = 2'h0 setting see Note 2)
serial transfer
20ms
or more
60ms
or more
VLOUT1 start up
Instructions for starting
Power supply(3)
Power-supply operation start setting
VCOMG = 1
serial transfer
VLOUT4 start up
step-up circuits
stabilizing time
Instructions for other mode
settings
Serial transfer
GRAM write
2 frames
or more
2 frames
or more
Display ON
Instructions before
power supply startup
SAP setting (HD6678)
Gate driver/LTPS LCD panel
control signal register settings
LPTS = 1
FW, FT settings
SW, ST settings
DPW, DPT settings
SDT setting
Display ON (1)
D1-0 = 2'h1
Display ON (2)
GON="1"
serial transfer
Display ON (3)
D1-0 = 2'h3
Display ON (4)
DTE ="1"
Display ON
Display each image by
setting BASEE and OSDE to 1
(Display ENABLE).
Note 1) Do not set GON = 1 while D - 2'h0.
Note 2) Start up VLOUT1 after waiting VLOUT2 to start up completely so that it is always VLOUT 2>VLOUT1.
When using 4-time stepped-up VLOUT2, first start up VLOUT2 to step up 5 times, and then resetting
VLOUT2 to step up 4 times after starting up VLOUT1.
Display ON flow
Rev.0.5, July.31.2003, page 188 of 196