Below are a list of common technical questions and answers we have compiled. If you have
a question which is not listed below, please feel free to
contact us.
1. What is the difference between TN and STN?
2. Can Hitech Display offer Chip on Glass?
3. What backlights are available for Hitech module's?
4. What color backlights are available?
5. Where can I find the LCD driver IC information?
6. What is a TCP?
7. Can Hitech Display make rapid prototype plastic samples?
8. Where can I find the Hitech Display model notation system?
9. Are there optimum glass szes for LCD modules?
10. What is the standard thickness of lcd glass?
11. Is Hitech products subjected to ROHS?
1. What is the difference between TN and STN?
| Description |
TN (Twisted Nematic) |
STN (Super Twisted Nematic) |
| 1 | Rubbing Angle |
90 Deg Rubbing) |
180 deg, 220 deg, 240 deg rubbing (Hitech -- std 240 deg rubbing) |
| 2 | Background Color |
Natural Grey |
Yellow Green, Grey, Natural Grey(FSTN) |
| 3 | Segment Color |
Black |
Dark Blue, Purple Blue, Black, Black Blue |
| 4 | Viewing Cone (Hor) |
Smaller Viewing Cone +/- 90 Deg |
Wider Viewing Cone +/- 135 Deg |
| 5 | Response Time |
Faster Response Time |
Slower Than TN Cell |
| 6 | Manufacturing & Material Costs |
Lower |
Higher |
| 7 | Applications |
Low Duty Driving |
High Duty Driving |
2. Can Hitech Display offer Chip on Glass?
Yes, Hitech offers chip on glass LCD modules.
3. What backlights are available for Hitech module's?
EL, LED, CCFL, Edge & Array.
4. What color backlights are available?
Blue, Pure Green, Yellow-Green, Amber Red and White.
5. Where can I find the LCD driver IC information?
You can find the LCD driver IC information via the following methods:
1. Download from the manufacture website.
2. Contact us and ask Hitech to provide the IC specifications.
6. What is a TCP?
TCP is a type of packaging which is called tape carrier package.
7. Can Hitech Display make rapid prototype plastic samples?
Hitech is capable of providing rapid prototyping of plastic.
8. Where can I find the Hitech Display model notation system?
All of Hitech Display's products are named with a universal notation standard. You may
find out more about our notation system from this
link.
9. Are there optimum glass sizes for LCD modules?
| LCD Length(365mm Mother Glass) |
LCD Width(406mm Mother Glass) |
| x Column |
Optimum LCD Length |
x Row |
Optimum LCD Width |
| 2 |
162.5 |
4 |
92.0 |
| 3 |
108.5 |
5 |
73.6 |
| 4 |
81.3 |
6 |
61.3 |
| 5 |
65.0 |
7 |
52.6 |
| 6 |
54.2 |
8 |
46.0 |
| 7 |
46.4 |
9 |
40.9 |
| 8 |
40.6 |
10 |
36.8 |
| 9 |
36.1 |
11 |
33.5 |
| 10 |
32.5 |
12 |
30.7 |
| 11 |
29.5 |
13 |
28.3 |
| 12 |
27.1 |
14 |
26.3 |
| 13 |
25.0 |
15 |
24.5 |
10. What is the standard thickness of lcd glass?
The standard thicknesses are: 0.55mm, 0.7mm and 1.1mm.
11. Is Hitech products subjected to ROHS?
Hitech is implementing its products to be ROHS complient. The target date for implementation is
July 1st, 2005.
