– 139 Avenida Victoria – Suite 100 – San Clemente, CA – 92672 – Tel: 949-361-8957 – Fax: 949-361-9158 – http://www.pacificdisplay.com –
Typical Electro-Optical Characteristics for Twist Nematic (TN) Display
LC Fluid Type
Drive Method
Operating Temperature
Storage Temperature
-10
o
C
Typical Operating Voltage
(2)
0
o
C
25
o
C
50
o
C
TOFF
Typical Switching Time
TON
Typical Temperature Coefficient (0~40
o
C)
Operating Frequency Range
(3)
Max. Contrast Ratio
Viewing Angle @ CR>=25
25
o
C
25 C
o
o
o
(1)
TN COMMERCIAL
(S)
Static
(LV)
C
C
--
V
--
3.0
--
mSec
mSec
mV/
o
C
Hz
CRMAX
qy
qx
250
80
200
60
--
30~300
30
-65
o
~+25
o
-70
o
~+70
o
-10~+60
-20~+60
--
--
5.0
--
Static
(HV)
TN EXTENDED
(W)
Static
(HV)
(4)
-40~+80
-40~+80
--
--
5.0
--
100
40
100
50
--
30~300
30
-65
o
~+25
o
-70
o
~+70
o
0
o
C
25
o
C
0
o
C
25
o
C
Notes:
•
•
•
•
(1)
-- The following table presents typical values only for positive TN displays and these values are subject to change without notice. Please consult with a Pacific
Display Devices applications engineer for the exact values of your display.
(2)
-- Maximum allowable DC voltage is 50mV.
(3)
-- Display could flicker but consumes less current at lower operating frequency.
(4)
– (W-LV) version is available with special order
Rev – 05.28.2009
PD-351
Pacific Display Devices
– 139 Avenida Victoria – Suite 100 – San Clemente, CA – 92672 – Tel: 949-361-8957 – Fax: 949-361-9158 – http://www.pacificdisplay.com –
Standard LCD Glass Part Numbering Notation:
Example: PD 351 - 2 - RC - S - LV - 6 - x
Notation
PD
351
-2
-RC
Descriptions
Pacific Display Devices Prefix
MODEL NUMBER
CONNECTOR TYPES
•
-2:
Elastomeric (Zebra) type
POLARIZER GRADE
•
-RC:
Commercial Reflective
•
-FC:
Commercial Transflective
•
-TC:
Commercial Transmissive
•
-RH:
Reflective, high stability
•
-FH:
Transflective, high stability
•
-TH:
Transmissive, high stability
FLUID OPERATING TEMPERATURE
•
-S:
Standard
•
-W:
Wide temperature
DRIVE VOLTAGE
•
-LV:
Low Voltage Operation
•
-HV:
High Voltage
VIEWING DIRECTION
•
-6:
6 o'clock (Standard)
•
-12:
12 o'clock
REMARKS or SPECIAL OPTIONS
•
Blank:
Standard
-S
-LV
-6
-X
LCD Service Life
The rated MTBF for the LCD Glass products are 100,000 hours minimum at 25° C ±10% in an environment meeting the
specifications outlined in this document, and a minimal amount of Ultraviolet Light impacting the LCD surface. Usage in an outdoor
/ direct sunlight (high UV) environment will reduce the MTBF to 50,000 hrs.
Definition of Acceptable LCD service life
•
Contrast of LCD maintains 30% of initial value
•
Current consumption of LCD will not exceed 300% of initial
•
There may be noticeable alignment deterioration in LCD cell layer
Rev – 05.28.2009
PD-351
Pacific Display Devices
– 139 Avenida Victoria – Suite 100 – San Clemente, CA – 92672 – Tel: 949-361-8957 – Fax: 949-361-9158 – http://www.pacificdisplay.com –
USING LCD GLASS
Installing LCD Glass
1) Do not apply pressure to the LCD Viewing Area sine it could permanently damage the LC cells ability to operate.
2) There is a protective plastic film installed on the LCD Viewing Area to protect the top LCD polarizer and underlying
glass for being scratched or marred during manufacturing or transit. The protective plastic layer must be removed
carefully without damaging the rigid plastic polarizer it is covering.
3) The LCD is made up of thin glass and plastic materials, and will break under harsh conditions. Care should be taken to
isolate the LCD from undue stress by the manufacturing process, shipping requirements, and end product usage.
Precaution for Handing LCD Glass
Since the LCD glass is fragile and has been assembled with a high degree of precision, avoid applying excessive shocks or making
any alterations to it.
1) Cover the surface with a transparent protective plate to protect the polarizer and LC cell.
2) Do not alter, modify or change the shape of the glass, or interconnecting pins or cables.
3) Do not drop, bend or twist LCM.
4) The glass can easily cracked or chipped with rough handling, especially at corners or edges.
Precaution for Hand Soldering the LCD to a PCB
The LCD glass and fluid are pretty durable, but the front and rear polarizers are specially made plastic sheets that reorient the
alignment of the light waves going through the LCD glass. Since they are plastic, they are very sensitive to heat and typically cannot
exceed 85 deg C without taking permanent damage. (Note: Specialty temperature range TN Glass can take up to 110 degrees on
special order). Hand Soldering guidelines:
1) Cover the surface with a transparent protective plate to protect the polarizer and LC cell.
2) Observe the following when soldering lead wire, connector cable and etc. to the LCD.
a)
Soldering iron temperature : 280°C
±
10°C.
b) Soldering time : 4 sec Max.
c)
Please note at no time can the LCD glass rise above 80°C.
3) Solder : Eutectic solder.
4) The front and rear polarizers on the LCD glass are plastic. Their temperature cannot exceed 85 deg C, EVER, or the
polarizers will melt and take permanent damage.
5) If soldering flux is used, be sure to remove any remaining flux after finishing to soldering operation. (This does not
apply in the case of a non-halogen type of flux.) It is recommended that you protect the LCD surface with a cover during
soldering to prevent any damage due to flux spatters. DO NOT get any of the cleaning fluid on the LCD polarizers since
permanent damage can occur. Please read the section below on the proper method and materials are acceptable to use on
a LCD.
NOTE: Soldering wires directly to the LCD pins or conductive pads is not recommended and will void the warranty of the part.
Wave soldering the LCD
The wave soldering of LCD glass is
not recommended
and we do not warranty any parts put through that process, but if you can keep
to the requirements of the specs above it may work acceptably for you. Please do careful evaluation of any wave soldered LCD
components for full operation, and that the LCD polarizers have an additional protective covering during this process.
Precautions for Operation
1) Viewing angle varies with the change of liquid crystal driving voltage. Adjust the drive voltage to show the best contrast
at your optimum viewing angle.
2) Driving the LCD in the voltage above the limit shortens its life.
3) Response time is greatly delayed at temperature below the operating temperature range. However, this does not mean the
LCD will be out of the order. It will recover when it returns to the specified temperature range.
4) The LCD will continue to operate up to its full rated storage temperature (Tst), but none of the optical viewing
characteristics are guaranteed beyond the rated operating temperature (Top).
5) If the display area is pushed hard during operation or installation, the display may become abnormal. This condition
should be corrected by cycling the power to the LCD; but it is not guaranteed and permanent damage may have
occurred.
6) Condensation at terminals may cause an electrical malfunction and possible electro-chemical reactions. The Relative
Humidity of the environment should therefore be kept below the condensation point (which is dependant on
temperature), but can typically be considered at 65%.
Rev – 05.28.2009
PD-351
Pacific Display Devices
– 139 Avenida Victoria – Suite 100 – San Clemente, CA – 92672 – Tel: 949-361-8957 – Fax: 949-361-9158 – http://www.pacificdisplay.com –
Handling
•
The display panel is made of glass. Do not subject it to a mechanical shock by dropping it or impact.
•
If the display panel is damaged and the liquid crystal substance leaks out, be sure not to get any in your mouth. If the
substance contacts your skin or clothes, wash it off using soap and water.
•
Do not apply excessive force to the display surface or the adjoining areas since this may cause the color tone to vary.
•
The polarizer covering the display surface of the LCD is soft and easily scratched. Handle this polarizer carefully.
•
If the display surface becomes contaminated, breathe on the surface and gently wipe it with a soft dry cloth. If it is heavily
contaminated, moisten cloth with petroleum benzene. Solvents other than petroleum benzene may damage the polarizer
•
Exercise care to minimize corrosion of the LCD electrical interconnection points. Corrosion of the electrodes is accelerated
by water droplets, moisture condensation or a current flow in a high-humidity environment.
•
Do not attempt to disassemble the LCD glass or seals.
•
To prevent damage of the LCD elements by static electricity, be careful to maintain an optimum work environment.
o
Be sure to ground the body when handling the LCD glass assy.
o
Tools required for assembling, such as soldering irons, must be properly grounded.
o
To reduce the amount of static electricity generated, do not conduct assembling and other work under excessively
dry conditions.
o
The LCD Viewing Area is coated with a plastic film to protect the display surface. Exercise care when peeling off
this protective film since static electricity may be generated.
Storage
•
•
•
•
When storing the LCD, avoid exposure to direct sunlight or to the light of fluorescent lamps
Store the LCD in a dark place where the temperature is 25
o
C ±10
o
C and the humidity below 65% RH.
Do not store the LCD near organic solvents or corrosive gases.
Do not crush, shake, or jolt the LCD Glass.
Cleaning
•
DO NOT wipe the dry polarizing plate with a dry cloth, as it may scratch the surface.
•
DO NOT use chemicals such as Ketonic solvents (Ketone and Acetone) or Aromatic solvents (Toluene and Xylene), Ethanol
or Isopropyl Alcohol as they will damage the polarizers. Avoid oil and fat. Avoid lacquer and epoxy which might contain
solvents and hardeners that erode the electrodes. Some solvents such as Freon or Trichloroethylene will also seep into the
epoxy covering the DIL pins and thereby cause corrosion of the electrical and mechanical connections in a high humidity or
condensing environment.
•
WIPE OFF saliva or water drops immediately. Contact with water over long periods of time may cause polarizer
deformation or color fading, while an active LCD with water condensation on its surface will cause corrosion of the ITO
electrodes.
•
Wipe the LCD Viewing Area gently with soft cloth soaked with a petroleum benzene.
Others:
•
Liquid crystals solidify under low temperature (below the storage temperature range) leading to defective orientation or the
generation of air bubbles (black or white). Air bubbles may also be generated if the LCD is subject to a low temperature.
•
If the LCD has been operating for a long time showing the same display patterns, the display patterns may remain on the
screen as ghost images and a slight contrast irregularity may also appear. A normal operating status can be regained by
suspending use for some time. It should be noted that this phenomenon does not adversely affect performance reliability.
Safety
•
If the LCD panel breaks, be careful not to get the liquid crystal in your mouth. If the liquid crystal touches your skin or
clothes, wash it off immediately using soap and plenty of water. The toxicity is extremely low, but caution should be
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