群創科技 InnoLux
TFT-LCD 驅動原理
群創光電新幹班EE專業教育訓練資料 A Display Company of Foxconn Group
群創科技 InnoLux
Operating Principle Of LCD
A Display Company of Foxconn Group
群創科技 InnoLux
群創科技 InnoLux
Turn On TFT Line By Line
A Display Company of Foxconn Group
群創科技 InnoLux
Frame Time
DATA
Gate
L1
L2
L3
Frame Time
1H
1
2
3
N A Display Company of Foxconn Group
1
128
128-bit Shift Register
VCC GND VDDA GNDA
RPI1 RPI2
Line Repair AMP
RPO1 RPO2
POL
CLK1 SHL DIO2
A Display Company of Foxconn Group
群創科技 InnoLux
Source Driver (NT3969A)
Common Swing (Cst on Gate)
1K 15P
Positive
High-Z
Negative
1K 15P
Vcom
群創科技 InnoLux
V reference circuit
V0
V1
7.6V
V4
Vcom
V5 3.8V
V8 V9
A Display Company of Foxconn Group
4.31V 3.29V
TRASMISSION
VGMA1 ~ VGMA14
DATPOL
D00P D00N D01P D01N
D22P D22N
CLKP CLKN DIO1
Data Register RSDS Receiver
14
Digital to Analog Converter
666
Level Shift
66
666
6
6
66
6
6
6
6
Line Latch ( 384 X 6 bit )
160
H-sync front porch
24 V-sync back porch 29
806 768
Display active area
CLK:65 MHz (cycle time:15.38 ns)
H-fre.:48.36 KHz Frame rate:60Hz
1024 1344
A Display Company of Foxconn Group
V-sync front porch 3
群創科技 InnoLux
XGA VESA Timing
H-Sync Hfp(24)
tx (1344) Hbp(160)
DSPTMG
Hsw(136)
tacx
V-Sync DSPTMG
3tx
29tx
6tx
38tx
768tx
A Display Company of Foxconn Group
群創科技 InneVs
B(+)
Ch(N-1) Gate Line Vg
Ch(N) Vg
Vct
Csd
Clc
Vst=Vct Cs
Cgs Cgd
正極性 W(+)
W(-) 負極性
B(-) Ct=Cs+Clc+Cgd
B(+)
B(+) 正極性
正極性
CsVge/Ct
0V
VOLTAGE
群創科技 InnoLux
T-V Curve
100% 90%
硓
硓 %
10%
0
Voff V90
A Display Company of Foxconn Group
V10 Von 硓硓(rms)
群創科技 InnoLux
100
Gamma Curve
90
gamma change
80
r2.2(0~100)
Cgs 水平C掃h(描NV)訊g 號
Cgd
Source Drain
Vgpp Vgd
Gate
Tg Vspp
Vgd
Vst:影像訊號的直流位準
A Display Company of Foxconn Group
Vgh
Vgon-min Vsh
Vdh Vst
Common Vsl
Vgoff-min Vdl Vgl
Common Swing (Cst on Com)
VData
VGate
CLC
CST
Vpixel +4V
VCOM
△=8V
+4V
-4V
-4V
CLC
CST
VCOM
+4V +4V
0V
+5V
Vpixel
-4V △V =3V
+1V
VCOM
A Display Company of Foxconn Group
群創科技 InnoLux
70
60
50
40
30
20
10
0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62
A Display Company of Foxconn Group
群創科技 InnoLux
Grayscale Voltage
Direct Driving of TFT-LCD
V63 V62
V2 V1 V0
V0 V1 V2
1 Frame / 1 Line
V62
V63
DC Bias of Common
A Display Company of Foxconn Group
群創科技 InnoLux
- 4 V +5V - 4 V
A Display Company of Foxconn Group
群創科技 InnoLux
Panel Driving
A Display Company of Foxconn Group
群創科技 InnoLux
TFT Operating
A Display Company of Foxconn Group
A Display Company of Foxconn Group
群創科技 InnoLux
LCD Driving Block
A Display Company of Foxconn Group
群創科技 InnoLux
Data (X) / Gate (Y)-Driver
NT3951C G3 256
CLK
Last
Tld LD
DIO1/2 ( Input )
LD
Tpsu Tpdh
POL
Twld Tlds
Odd outputs
High-Z
Even outputs Tst
Output load condition : Output
1K 15P
High-Z
Tst
1K
1K
15P
15P
A Display Company of Foxconn Group
群創科技 InnoLux
Vcoupling ( Feed-through )
Cgs
Vgd

CgdVghl
Cgd Cs CLC Csd

CgdVghl
Cgd Cs CLC
Cgd Csd
Ex : CLC 0.2 pF, Cs 0.8 pF,Cgd 0.05 pF
Vghl Vgh Vgl 20 10 30V
Vsl Black(-)
資料驅動晶片 輸出訊號電位
Black(+)
正極性驅動
White(+) ΔVp
White(-) Vct=Vst-ΔVp 負極性驅動
Black(-) 液晶畫素電位
A Display Company of Foxconn Group
群創科技 InnoLux
Gate Driver (2-level NT3951C)
群創科技 InnoLux
Gate Driver (2-level NT3951C)
1. U/D = 'H' MODE='H' (256+2 CH output)
CPV
1
2
34
5
6
7
VDD DI/O
Xon
OE VGG
X1
GND
X2 X3
X4
X5
255 256 257 GND
VDD GND GND VDD
W(+)
W(+)
W(-)
Δ Vp=CgdVghl/Ct
W(-)
負極性
CsVge/Ct
B(-)
負極性 B(-)
A Display Company of Foxconn Group
群創科技 InnoLux
Source Driver (NT3969A)
Y1
Y3