FSTN LCD: 6 O’Clock vs 12 O’Clock Viewing Direction

Selecting the correct viewing direction is critical for FSTN graphic LCD modules used in industrial handheld meters, gas detectors and control panels. Improper viewing direction may lead to low contrast, grey inversion and unreadable display after hardware and enclosure design are finished.

For FSTN and TN dot matrix LCD, viewing direction is marked as 6 O’Clock or 12 O’Clock on datasheet.

• 6 O’Clock Viewing Direction: Optimized for viewing from below. Users look upward to the screen. Widely used for wall-mounted controllers and high-installed instruments.
• 12 O’Clock Viewing Direction: Optimized for viewing from above. Users look down at the screen. Suitable for desktop meters and portable testers.

Many engineers confuse the two definitions. Even though FSTN delivers better contrast and wider viewing angle than standard TN, FSTN transmissive positive LCD still has obvious viewing bias. Adjusting contrast voltage cannot change the native viewing direction. It must be confirmed at the early design stage.

Enrich Display supplies mature 1.2 Inch 128×64 Graphic Dot Matrix LCD Module with ST7567A driver IC. Key Specifications: Driver IC: ST7567A Display Mode: FSTN, Transmissive Positive Viewing Direction: 6 O’Clock Structure: COG + FPC Operating Temp: -10℃ ~ +60℃ Storage Temp: -20℃ ~ +70℃

This 12864 graphic LCD fits industrial instruments, handheld detectors and smart meter projects requiring 6 O’Clock optical performance. Standard samples are available for quick testing. Custom FPC layout, pin definition and backlight are acceptable.

FAQ

1. Can I use a 6 O’Clock LCD for 12 O’Clock application? Not recommended. The contrast will drop sharply and grey inversion will appear.
2. Is FSTN better than TN for monochrome dot matrix screen? FSTN has higher contrast and wider viewing angle, more popular for instrument displays.
3. Can you supply both 6 O’Clock and 12 O’Clock versions for 128x64 ST7567A LCD? Yes, we can arrange different viewing direction according to customer project requirements.