Specifications

LCY-07084A-7
(7) Electrical Characteristics
7-1) TFT-LCD panel driving section
Table7-1 Recommended operating conditions GND=0V , Ta=25℃
Parameter Symbol ＭＩＮ ＴＹＰ ＭＡＸ Unit Remarks
Power supply Analog VSHA +5.0 +5.3 +5.6 V
of source driver Digital VSHD +2.5 +3.3 +3.6 V
Hi VDD +14.8 +15.0 +15.2 V
AC VEEAC − COM AC − Vp-p [Note7-1]
TFT
driving
Lo
DC
VEEDC −11.8 −12.0 −12.2 V
Hi VCC VSS+VSHD
−0.3
VSS+VSHD VSS+VSHD
＋0.3
V [Note7-2]
Power supply
of gate driver
Logic
Lo VSS −17.0 −17.4 −17.8 V
Power supply of gray image V0∼V10 0 − VSHA V [Note7-3]
Hi input VIHS 0.8×VSHD − VSHD V [Note7-4] Input voltage
of source driver
Lo input VILS GND − 0.2×VSHD V
Hi input IIHS − − 10 µA [Note7-4] Input current
of source driver
Lo input IILS − − 10 µA
Hi input VIHG 0.8×VSHD − VSHD V Input voltage
of gate driver
Lo input VILG GND − 0.2×VSHD V [Note7-5]
Hi input IIHG − − 1.0 µA Input current
of gate driver
Lo input IILG − − 1.0 µA
ＡＣ component COM AC − ±3.6 ±4.0 Vp-p Common
electrode
driving signal
ＤＣ component COM DC +0.5 − +2.5 V
[Note7-6]
ＡＣ component VCSAC − ±3.6 ±4.0 Vp-p CS driving
signal
ＤＣ component VCSDC −5.3 −5.5 −5.7 V
[Note7-1]
[caution] Notes when power supply is turned on.
Please do a power supply on and the power-off in a simultaneous each power supply or the following
order. And, please input the signal after turning on all power supplies.
Turn on VSHD,VSHA,VSS,VCC → Logic signal ,VEE → VDD → MODE1,MODE２
Turn off VDD → VEE , Logic signal(Include MODE1 and MODE2) → VCC,VSS,VSHA,VSHD
* Condition VSS ＜ VCC
At the terminals of MODE1/MODE2 signals, input low voltage when applying the power supply, and
hold low voltage for more than 2 vertical synchronous terms after VDD rises completely.
Then, either or both of them should hold high voltage until the power supply is turned off.
[Note7-1] This is must be made into common electrode driving signal, this phase, and this amplitude.
And please keep VSS≦VEE.
[Note7-2] Condition: VSHD=3.3V
[Note7-3] It is a standard power supply for gray scale.
Whenever the polarity of common electrode drive signal (VCOM) is changed, please also
change this standard voltage.V0 (black) power supply becomes the reverse characteristic of
VCOM, and V10(white) becomes the same polarity as VCOM. Please shift the center value
of each power supply amplitude to the plus(+) direction according to the characteristic of
liquid crystal as it will go to white side like V1,V2,V3,V4,V5,V6,V7,V8,V9,V10, if the center
value of each power supply amplitude is based on the center value of V0(black). After DC
adjustment of VCOM signal is adjusted in case of the V0 gray scale display, please adjust
this amount of shifts so that a flicker does not occur in the power supply display of each
gray scale.