LCD Driver

6
Matrix
39 IC Design 2001, MAY
LCD Driver
segment
7
static driver
(
:p309)
... multiplex driver
7
segment
-
static driver
static driver 8
(Segment Electrode)
(Segment Electrode)
( :p20~p21)
(Electro-optic effect)
90
(
:p77)
Twisted Nematic 180
STN 3 360
Super
2:TN
Fig Source: http://moebius.physik.tu-berlin.de/lc/lcd.html
37 IC Design 2001, MAY
Active Matrix Liquid Crystal
Display(
AMLCD)
44 IC Design 2001, MAY
CRT
(
)
TFT-LCD
200~250 cd/m2
IPS(IN-PLANE-SWIT C H I N G ) M VA ( M U LT I - D O M A I N VERTICAL ALIGNMENT) TN+FILM
LCD Driver
LCD Driver
(Liquid Crystal)
(
:p1)
(Sematic) 1(a)
(
:p6)
(Nematic) 1(b)
(
:p6)
: (birefringence)
(a)
1:
36 IC Design 2001, MAY
(b)
(C)
(Ch)
(
:p7)
(N) (double refraction)
b
(
)
12 a 3
(
)
42 IC Design 2001, MAY
/display/
RGB(
)
(G) (B)
RGB
8
(16 , 777 , 216
)
(color filter)
(R) 24
(dot ) pixel)
1280X1024 (sub-pixel)
LCD Driver
SBE Super-Twisted Birefringence Effect (
:p87)
3: STN
Phase Change Phase Change PC
4
TFT 0.1 m STN 0.03 m
(
:p102)
Spacer
Fig Source:/07panels.htm#DSTN%20displays
4
STN
38 IC Design 2001, MAY
Polarizer
5
360
(
:p247)
5
(
:p248)
Matrix
6
X
Y
XY
Segment
(
:p234)
Fig Source:http://liqcryst.chemie.uni-hamburg.de/lcionline/training/train_02/frame.htm
lcd driver (liquidcrystal) :p1)(sematic) :p6)(nematic) :p6)ic design 2001, may 36 lcd driver lcd driver (birefringence)(double refraction) http:/ .tw/imi/ (ch)ic design 2001, may (chole teric) :p6)(lcd liquid crys ta displaydevice) :p20~p21)(electro-optic effect) ffect thermo-opti effect :p114)twis te nema tic twistednematic 180360 37 2:tn fig source: http://moebius.physik.tu-berlin.de/lc/lcd.html ic design 2001, may 38 lcd driver fig source:/07panels.htm#dstn%20displays sbe super-twisted birefringence effect stnphase change phase change pc spacertft 0.1 stn0.03 stnic design 2001, may polarizer :p247)matrix :p234)39 matrixfig source:http://liqcryst.chemie.uni-hamburg.de/lcionline/training/train_02/frame.htm static driver (segmentelectrode) (segment electrode) (common electrode) :p309)ic design 2001, may 40 lcd driver staticdriver multiplex driver staticdriver :p310)ic design 2001, may multiplex driver (segment el ectrode) (segmentelectrode) (common electrode) (segmentelectr
43 IC Design 2001, MAY
LCD Driver
Pixel( )
SVGA Resolution
SVGA
VGA 800 x 600
can line# Data line# 800 x 600 ,
3(RGB) Resolution
640 x 480 800 x 600 3
14 LCD
Resolution
1024x768) (
(0.28mm)
(sub-
3840X1024 15.1 0.0118 (0.3mm) 1280x1024)
( 18.1
0.01
/display/
13
TFT
(
)
RGB
(dot Pitch) A measurement that indicates the diagonal distance between like-colored phosphor dots on a display screen source:/TERM/d/dot_pitch.html Dot Pitch Explained /csf/dotpitch/dotpit.htm
(Common Electrode)
(
:p311)
9
(
:p312)
TFT(Thin Film Transistor )
Active matrix driver
10
10 Fig source http://moebius.physik.tu-berlin.de/lc/lcd.html
41 IC Design 2001, MAY
Fig Source:/05graphics.htm#Resolution
Passive Matrix Liquid Crystal
Display(
PMLCD)
RGB
(sub-pixel)
(pixel)
(pixel)
(view angle) CRT
LCD Driver
(Backlight )
(shape)
11
11
(Backlight )
Fig source:/ s.htm#DSTN%20displays
(Active Element)
12
3
(
)
(
),
(ON )
(OFF )
(
:p150)
LCD
TN
Nomally White
Black
LCD STN
LCD
Normally TN
(
:p139~p140)
15 LCD
1.
46 IC Design 2001, MAY
89 89
/display/ 2.

(Common Electrode)
(
:p309)
8:
(static)
40 IC Design 2001, MAY
(
:p310)
multiplex driver
(Segment Electrode)
3
9
(Segment Electrode)
(Common Electrode)
3
(Segment Electrode)
---
250 1 /display/
Brightness
TFT-LCD
45 IC Design 2001, MAY
LCD Driver
/ Luminance
/
Source: /Informatio n/Technical/technical-information.html
Luminance ( / ) It relates to the observed brightness of an object. It is determined by how much light is reflected back and is measured in candelas per square meter (cd/m2). Since a surface s reflective properties can vary widely, similar illuminance can result in different luminance. For example, if a black and a white room were lit to the same illuminance level, the luminance of the black room would be very low and dull compared to that of the white room.
CRT 100 to 120 cd/m2
160
CRT
10:1
(
///)
/display/
(contrast) ()
()
CRT 500:1
CRT CRT
TFT-LCD
/display/
.tw/imi/o ptics1.html
(Cholesteric)
1(c)
(
:p6)
(LCD liquid crystal display device)
(
:p73)
Thermo-optic effect
Thermo-optic effect ( :p114)
Twisted Nematic 2
LCD
(response time) TFT-
Flicker , refresh rate ,
72 Hz screen flicker
redrawn refresh rate
LCD
LCD
15 LCD
20~30ms
25
(
40ms)
(
)
/display/