EL lifetime

OPTIONS & SELECTION GUIDES
TN (Twisted Nematic)
STN (Super Twisted Nematic)
BACK LIGHT
EL (Electro- luminescent)
l Power efficient
l STN type offers high contrast and wide viewing angle.
LED with a choice of colors
l STN type is available with different background colors;
l
l
l
l
l Yellow-green w/black characters
l Silver-gray w/dark blue characters
l Dark blue w/white characters
FSTN (Film STN)
Bright and even back lighting
Long life expectancy, more than 100,000 hours
Simple to drive. Needs +5 volts only
Brightness can be easily adjusted
CCFL (Cold Cathode Florescent Light)
l Paper white, best for large graphic displays
l Less power consumption than LED’s
l Black and white STN with very high contrast ratio for
large graphic panels.
DISPLAY TYPE
l Positive image (Dark dots on light background)
l Negative image (Light dots on dark background)
TEMPERATURE RANGE
OPPERATION (°C)
STORAGE (°C)
STANDARD
0 ~ +50
-20 ~ +70
EXTENDED
-20 ~ +70
-30 ~ +80
VIEWING ANGLE
l 12:00 (Top) Display is below eye level
l 6:00 (Bottom) Display is above eye level
SELECTION GUIDE
DISPLAY/POLORIZER
DISPLAY DESCRIPTION
OUTDOORS
OFFICE LIGHT
SUBDUED
LIGHT
VERY LOW
LIGHT
COMMENTS
REFLECTIVE POSITIVE
DARK CHARACTERS ON A
LIGHT GREY OR YELLOW
BACKGROUND
EXCELLENT
VERY GOOD
POOR
UNUSABLE
CAN’T BE BACK LIT
TRANSFLECTIVE POSITIVE
DARK CHARACTERS ON A
LIGHT GREY OR YELLOW
BACKGROUND
EXCELLLENT
VERY GOOD
VERY GOOD
EXCELLENT
BEST CHOICE FOR GENERAL
USE
TRANSMISSIVE NEGATIVE
LIGHT CHARACTERS ON A
DARK BACKGROUND
POOR
GOOD
VERY GOOD
EXCELLENT
MUST BE USED WITH A BACKLIGHT
TRANSMISSIVE POSITIVE
DARK CHARACTERS ON A
LIGHT GRAY OR YELLOW
BACKGROUND
GOOD
VERY GOOD
EXCELENT
EXCELLENT
HIGH CONTRAST DISPLAY
TEMPERATURE COMPENSATION & EL LIFE TIME
VDD
+5V
THERMISTOR
272k @ 0°C
LCD
MODULE
T
9.6k @ 100°C
56kΩ
PNP hfe=≥200
VL
VSS
AMBIENT CONDITIONS 20°C 70% RH
100k @ 25°C
INITIAL BRIGHTNESS RATIO
10mΩ
100%
100V 50Hz
50%
27kΩ
100V 400Hz
100V 700Hz
-5V
1250
Page 3
2500
TIME (hours)
3750
5000
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