Driver and environment
The reference uses 1/4 duty, 1/3 bias at 5.0 V and 64 Hz, with a 6 o'clock viewing direction and an operating range of −30 to +80 °C.
PRODUCT EXPLORERFront view
Rotate, zoom and inspect the product. Loads on request.
Front product rendering of S3440D, showing the speed field, odometer, GEAR digit and fuel bar on a white background.
OEM DISPLAY REFERENCE
S3440D
Arc-bottom HTN negative LCD for speed, gear and odometer readouts
S3440D uses an arc-shaped lower edge around a three-digit speed field with mph and km/h legends, a six-digit odometer field, a GEAR digit, a fuel bar with F/E marks and battery and DSP SYS legends. The drawing specifies HTN negative mode and 29 pins on a 2.00 mm pitch.
63.11 × 29.05 mmMinimum viewing area
HTN, negativeDisplay mode
A starting point for your custom display.
Images, 3D geometry and listed parameters are OEM reference information. Final dimensions, electrical requirements, optical configuration and construction are confirmed for your project.
Product video
Short product video. Playback starts when you press play.
01 / REFERENCE CONFIGURATION
Start with the essentials.
A reference configuration for discussing your LCD project. Final specifications are subject to project confirmation.
| Model reference | S3440D |
|---|---|
| Display mode | HTN, negative |
| Drive condition | 1/4 duty, 1/3 bias |
| LCD operating voltage | 5.0 V |
| Frame frequency | 64 Hz |
| Viewing direction | 6 o'clock |
| Operating temperature | −30 to +80 °C |
| Storage temperature | −40 to +90 °C |
| Front polarizer | Transmissive, adhesive |
| Rear polarizer | Transmissive, adhesive |
| Connection | Pins |
| Glass outline | 66.11 ± 0.20 × 34.55 ± 0.20 mm |
| Front glass height | 32.05 ± 0.20 mm |
| Minimum viewing area | 63.11 × 29.05 mm |
| Pin count | 29 |
| Pin pitch | 2.00 mm |
| LCD thickness | Max. 2.80 mm |
| Pin length | 10.40 ± 0.50 mm |
02 / OEM DESIGN
Make the display fit your product.
Bring your requirements. We will review the configuration with you.
Curved outline
The lower edge is an arc. Match the housing window to the 63.11 × 29.05 mm minimum viewing area and the curved glass outline.
03 / APPLICATION DIRECTION
Instrument displays
The source application is instrument displays. The legends and bar segments are fixed; speed, distance, fuel and battery values are supplied by the host instrument.
ENGINEERING NOTES
What the specification means for your design.
How S3440D relates to LCD mode, drive, connection and integration choices, with links to the SuccessLCD engineering guides.
HTN LCD mode, negative
High twisted nematic glass: better contrast and a wider viewing angle than TN at a similar cost. Negative mode shows bright segments on a dark background with a backlight. Compare TN, HTN, STN, FSTN, DFSTN and VA →
Drive: 1/4 duty, 1/3 bias
4 common electrodes share the segment lines. Set the controller to the duty, bias, voltage and frame frequency on the drawing. Duty and bias explained →
Connection: metal pins
Metal pins are soldered into the PCB, the most robust connection for segment glass. LCD connection types →
Negative display
A negative LCD needs a backlight; the look is close to a VFD or LED readout. VFD vs LCD →
Similar HTN references
- S04799DBlue negative HTN display reference
- S3915DIrregular-outline HTN LCD with speed, clock and fuel artwork
- S3419DCompact HTN LCD with gear digit, clock field and fuel bar
- S3675DLarge HTN LCD with speed, clock, odometer and fuel-economy fields
- S3516DInstrument HTN LCD with dual numeric rows and unit legends
- S3676DAngled-outline HTN LCD with speed, clock, trip and fuel fields
04 / PRODUCT SUPPORT
From reference to your design.
Does S3440D need a backlight?
Negative-mode HTN glass is normally viewed with a backlight. The backlight is not part of this reference and is specified for your project.
Can it show both mph and km/h?
Both legends are in the artwork. Which one is active is controlled by the driver.
YOUR NEXT LCD PROJECT
Let’s shape your display.
Share your required display content, enclosure space, drive arrangement, operating environment and target quantity.
