For technical support, please contact info@3-t.com.hk, full manual of the LCD will be provided upon purchase.

1. Glossary

2. F.A.Q.

3. LCD modules details

Glossary
COF  :   Chip-on-Flex
 
COB  :   Chip-on-Board
 
COG  :   Chip-on-Glass
 
CR     :   Contrast Ratio
 
DSTN:   Double Super-Twisted Nematic
 
FSTN :  Film Super-Twisted Nematic
 
HTN   :  High Quality Twisted Nematic
 
ISTN  :  Improved Super-Twisted Nematic
 
LCD   :  Liquid Crystal Display
 
LED   :  Light Emitting Diode
 
SRC   :  Super Reflective Color (Birefringent Color)
 
STN   :  Super-Twisted Nematic
 
TAB   :  Tape Automated Bonding
 
TDF   :  Transflective Display Film
 
TFT   :  Thin Film Transistor
 
TN     :  Twisted Nematic
 
WTN :  Wide Viewing Twisted Nematic
 
WVF Wide Viewing Film
 
 
   

FAQ - How to order LCDs

In order for us to have a quick quotation of your products, the following information is needed although we encourage you to send us as much information as you have (To order, complete LCD info is needed,  please refer to the LCM Number Notation Guide  to select different LCD options.):

Standard LCD:

  • Standard LCD part number
  • Display type: Positive or negative (positive is the normal type)
  • Operating and storage temperature range
  • Quantity of your order per order or annually

If everything matches our standard LCD, samples can be purchased for your evaluation.

Custom LCD (tooling charge may be needed)

  • Outside dimension of LCD
  • Display type: Positive or negative
  • TN or STN (If you are not so sure how to choose, we will suggest to you)
  • Operating and storage temperature range
  • Number of metal pins(If any)
  • Driving conditions: multiplex (duty), Bias and voltage
  • Special needs (If any)
  • Quantity of your order per order or annually

Please send the drawing in pdf format.

With the above information, we are able to send you the quotation.  After your confirmation of the quotation, we need detail drawing or sketch. With your drawing, we will begin to produce counter-drawing for your confirmation. After your confirmation of the drawing with your signature, we will begin to produce the samples. After your confirmation of the samples, we are ready to produce your volume order.

If you are not so sure of above or have any difficult to design a LCD, please contact us and let us know your idea, our engineers will assist to realize your idea.

We accept checks and money order.

LCD modules details

1. Product Range (LCM)

*
Liquid Crystal Modes : TN / HTN / STN / FSTN
Driving Ratio        : Static 1/240 duty
Connection Method *: Zebra / Heat Seal / Metal Pins
Package : SMT / COB / TAB / COG
Full range of standard character and graphic module is available

2. Lead-time (LCM)

*
Sample Lead-Time
 *                  Standard Sample  : 3-4 Weeks
                   Customs-Made Sample : 8-10 Weeks
                   Customs-Made LCD Sample : 5-6 Weeks
*

*Production Lead-Time        *

 *                  Standard Module  : 7-8 Weeks
                   Customs-Made Modules : 8-10 Weeks
                   Customs-Made LCD : 7-8 Weeks

3. Manufacturing Plant
 
LCM : 82,000 sq. ft.
LCD : 440,000 sq. ft.
4. Quality Assurance  Standard
  •    AQL inspection standard

  •     Sampling method: MIL-STD-105E, Level II, single sampling.

5. Reliability of LCM
Reliability Test Condition:

Test Conditions

Condition  Time (hrs)

Assessment

High temp.  Storage 60°C 240

No abnormalities

in functions

and appearance

 

High temp. Operating 50°C 240
Low temp. Storage  -10°C 240
Low temp. Operating 0°C 240
Humidity  40°C/ 90%RH 240
Temp. Cycle

 -10°C  <-   25°C  <-  60°C

(30 min   <-   5 min   <-   30min)

10cycles
Recovery time should be 24 hours minimum. Moreover, functions, performance and appearance shall be free from remarkable deterioration within 50,000 hours under ordinary operating and storage conditions room temperature (20+8°C), normal humidity (below 65% RH), and in the area not exposed to direct sun light.

6. Precaution for using LCM

LCM is assembled and adjusted with a high degree of precision. Do not attempt to make any alteration or modification. The followings should be noted.

General Precautions:

1. LCD panel is made of glass. Avoid excessive mechanical shock or applying strong pressure    onto the surface of display area.

2. The polarizer used on the display surface is easily scratched and damaged. Extreme care should be taken when handling. To clean dust or dirt off the display surface, wipe gently with cotton, or other soft material soaked with isoproply alcohol, ethyl alcohol or trichlorotriflorothane, do not use water, ketone or aromatics and never scrub hard.

3. Do not tamper in any way with the tabs on the metal frame.

4. Do not made any modification on the PCB without consulting TRI-T.

5. When mounting a LCM, make sure that the PCB is not under any stress such as bending or twisting. Elastomer contacts are very delicate and missing pixels could result from slight dislocation of any of the elements.

6. Avoid pressing on the metal bezel, otherwise the elastomer connector could be deformed and lose contact, resulting in missing pixels and also cause rainbow on the display.

7. Be careful not to touch or swallow liquid crystal that might leak from a damaged cell. Any liquid crystal adheres to skin or clothes, wash it off immediately with soap and water.

Static Electricity Precautions:

1. CMOS-LSI is used for the module circuit; therefore operators should be grounded whenever he/she comes into contact with the module.

2. Do not touch any of the conductive parts such as the LSI pads; the copper leads on the PCB and the interface terminals with any parts of the human body.

3. Do not touch the connection terminals of the display with bare hand; it will cause disconnection or defective insulation of terminals.

4. The modules should be kept in anti-static bags or other containers resistant to static for storage.

5. Only properly grounded soldering irons should be used.

6. If an electric screwdriver is used, it should be grounded and shielded to prevent sparks.

7. The normal static prevention measures should be observed for work clothes and working benches.

8. Since dry air is inductive to static, a relative humidity of 50-60% is recommended.

Soldering Precautions:

1. Soldering should be performed only on the I/O terminals.

2. Use soldering irons with proper grounding and no leakage.

3. Soldering temperature: 340°C+5°C

4. Soldering time: 3 to 4 second.

5. Use eutectic solder with resin flux filling.

6. If flux is used, the LCD surface should be protected to avoid spattering flux.

7. Flux residue should be removed.

Operation Precautions:

1. The viewing angle can be adjusted by varying the LCD driving voltage Vo.

2. Since applied DC voltage causes electro-chemical reactions, which deteriorate the display, the applied pulse waveform should be a symmetric waveform such that no DC component remains. Be sure to use the specified operating voltage.

3. Driving voltage should be kept within specified range; excess voltage will shorten display life.

4. Response time increases with decrease in temperature.

5. Display color may be affected at temperatures above its operational range.

Operation Precautions:

1. Keep the temperature within the specified range usage and storage. Excessive temperature

and humidity could cause polarization degradation, polarizer peel-off or generate bubbles.

2. For long-term storage over 40°C is required, the relative humidity should be kept below 60%.

Avoid direct sunlight.

7. Limited Warranty

TRI-T modules are not consumer products, but may be incorporated by TRI-T's customers into consumer products or components thereof, TRI-T does not warrant that its modules and components are fit for any such particular purpose.

1. The liability of TRI-T is limited to repair or replacement on the terms set forth below. TRI-T will not be responsible for any subsequent or consequential events or injury or damage to any personnel or user including third party personnel and/or user. Unless otherwise agreed in writing between TRI-T and the customer, TRI-T will only replace or repair any of its LCD which is found defective electrically or visually when inspected in accordance with TRI-T QUALITY INSPECTION STANDARD.

2. No warranty can be granted if any of the precautions state in handling liquid crystal display above has been disregarded. Broken glass, scratches on polarizer mechanical damages as well as defects that are caused accelerated environment tests are excluded from warranty.

3. In returning the LCM, they must be properly packaged; there should be detailed description of the failures or defect.

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