Optrex DMF50161N 320×240 Monochrome LCD Module: Technical Specifications and Applications
Optrex DMF50161N 320×240 Monochrome LCD Module
Introduction and Core Product Highlights
The Optrex DMF50161N is a highly robust 320 x 240 dot-matrix monochrome graphic display. This legacy panel delivers exceptional contrast and stable performance in harsh industrial environments. Built with high-reliability liquid crystal fluid technology, it ensures readability over extended operating cycles. For engineers looking to replace or integrate these panels, maintaining strict environmental control during installation is vital. You can read about the impact of manufacturing environments in our guide on the critical role of cleanrooms in industrial LCD manufacturing.
- Core Specifications: 320 x 240 Pixels | STN/FSTN Technology | Parallel 4-bit Interface
- Key Engineering Benefits: Prolonged component lifecycle and simplified legacy bus integration.
- Drive Contrast Bias: This module requires an external negative voltage source (typically around -22V) to tune the liquid crystal alignment for optimal readability.
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Around the UVP: High-Duty Multiplex Driving and Structural Rigidity
The primary strength of the DMF50161N lies in its high-duty multiplex passive-matrix driving scheme. Unlike active-matrix TFTs, this STN module utilizes specialized row and column drivers to activate pixels systematically. This design offers a significant advantage in simplicity and physical durability. It makes the display ideal for industrial control terminals that face heavy electromagnetic interference.
To understand the driving mechanism, think of the passive matrix as a well-coordinated train network. The row and column drivers act as dispatchers. They route electrical signals precisely to specific pixel coordinates without collision or signal degradation. This keeps the displayed text and graphics sharp without needing complex active transistors at every subpixel site. To explore more about core technologies, visit our LCD core technology page.
Thermal stability and mechanical design are also key. The module features a rugged metal frame that protects the glass substrate from physical stress. Since industrial equipment often faces mechanical abuse, selecting a display with built-in shock resistance is critical. Engineers can read more on this topic in our comprehensive guide to vibration and shock resistance for industrial displays.
Optimized Application Scenarios
- CNC Control Panels: The high contrast and parallel interface allow rapid rendering of static toolpath coordinates under heavy electrical noise.
- Medical Diagnostic Terminals: FSTN options provide high visual clarity and wide viewing angles for patient-monitoring machinery.
- Legacy HMI Retrofitting: Excellent physical compatibility allows direct replacement in older factory automation terminals.
- Industrial Dimming Systems: To maintain operator well-being, the backlight can be modulated using stable external dimming circuits. Learn more about display tuning in our guide on industrial LCD dimming and operator well-being.
Best-Fit Conclusion: The DMF50161N is the ideal choice for legacy industrial terminals requiring a reliable, high-contrast, non-TFT graphic interface under harsh conditions.
Key Specifications
| Parameter Category | Specification | Value / Details |
|---|---|---|
| Physical Properties | Resolution | 320 x 240 pixels (QVGA) |
| Outline Dimensions | 159.4 x 101.0 x 11.0 mm (typical) | |
| Viewing Area | 121.0 x 76.4 mm | |
| Electrical Specifications | Supply Voltage (Logic) | 5.0V (VDD) |
| LCD Driving Voltage | VEE – VSS (approximately -22.0V to -24.0V) | |
| Interface Type | Parallel 4-bit / 8-bit data bus | |
| Optical & Thermal | Backlight Options | CCFL or LED (sub-variant dependent) |
| Operating Temperature | 0°C to +50°C (Standard) |
Engineer FAQ
Q1: How do I calculate the proper contrast adjustment for the DMF50161N?
A: Contrast is adjusted by regulating the negative drive voltage on the V0 bias pin. Since liquid crystal viscosity changes with temperature, a thermistor-based compensation circuit is recommended to dynamically stabilize contrast between 0°C and 50°C.
Q2: Does this display include an integrated graphics controller like the T6963C or SED1335?
A: No, standard configurations of this module are panel-only. They feature onboard row and column drivers but require an external microcontroller or graphic LCD controller to feed pixel data and generate timing signals.
Q3: What are the power supply requirements for retrofitting this legacy module?
A: The logic circuitry operates on standard 5.0V power. However, you must provide a negative bias voltage generator on your controller board to supply the necessary negative driving potential for the LCD panel.
Design Empowerment and Reliability
This Optrex monochrome panel remains a trusted component for industrial displays where modern TFT screens are too delicate or complex. By providing high contrast, stable passive-matrix driving, and an extremely rugged mechanical frame, it enables engineering teams to maintain legacy control systems without expensive system-wide redesigns.