GDM12864A Datasheet, PDF (6/22 Pages) List of Unclassifed Manufacturers – Liquid Crystal Display Module

Chapter 1 Introduction to GDM12864A LCM 4
Electro-Optical characteristics
TN Type (Twisted Nematic )
Item
Symbol Min. Typ. Max. Unit Condition Note
Viewing Angle
?₂ -?₁
40
-
f
-
deg. Cr = 2.0 1,2
Contrast Ratio
Cr
-
4
-
-
?=20^?
f = 0^?
3
Response Time (rise)
t_R
-
110
-
ms
?=20^?
f = 0^?
4
Response Time (fall)
t_F
-
110
-
ms
?=20^?
f = 0^?
4
STN Type (Super Twisted Nematic )
Item
Symbol Min. Typ. Max. Unit Condition Note
Viewing Angle
Contrast Ratio
Response Time (rise)
Response Time (fall)
?₂ -?₁
f
Cr
t_R
t_F
70
-90
-
+90 deg. Cr = 2.0 1,2
-
4
-
-
?=20^?
f = 0^?
3
-
110
-
ms
?=20^?
f = 0^?
4
-
110
-
ms
?=20^?
f = 0^?
4
1. Definition of angle _¦È& _¦Õ
2. Definition of viewing angle _{¦È 1} & _{¦Õ 2}
Y(_¦Õ=180 ^¦Ï )
¦È ₂
¦È ₁
Y’(¦Õ=0 ^¦Ï )
3. Definition of contrast Cr
Cr
¦È ₁^{<20 ¦Ï <}¦È ₂
2.0
¦È ₁ ^{20 ¦Ï} ¦È ₂
4. Definition of optical response
100%
B
Intensity ^Selected
Dots
Non-
selected
Dots
Off
On
90%
Intensity _100%
0%
A
100%
Set Point
Driving Voltage
t_R
Cr = ( A / B ) ^p Negative : P = -1
Positive : P = +1
Off
10%
Time
t_F