Oki PG640400RA4 | Robust 640x400 FSTN Display for Industrial HMI
The Oki PG640400RA4 is an industrial-grade monochrome display engineered for applications where clarity, reliability, and long-term performance are non-negotiable. Far from a generic consumer screen, this component is a purpose-built solution for designers and maintenance engineers working with legacy systems or developing new equipment that demands an unambiguous and robust human-machine interface (HMI).
Product Highlights for Demanding Applications
- High-Clarity Resolution: A crisp 640x400 pixel resolution delivered on a high-contrast FSTN (Film-compensated Super-twisted Nematic) panel, ensuring excellent readability of complex graphics and text.
- Proven Industrial Reliability: Built by Oki, a name synonymous with durable electronics, the PG640400RA4 is designed for longevity in challenging factory floor and field environments.
- Simplified System Integration: Features the widely adopted Toshiba T6963C controller, streamlining the driver development and integration process, especially for retrofitting older equipment.
- Stable Performance: Equipped with a CCFL (Cold Cathode Fluorescent Lamp) backlight that provides bright, even illumination and a stable operational life, critical for consistent performance.
Engineered for Clarity and Durability in Demanding Environments
The true value of the Oki PG640400RA4 lies not just in its specifications, but in how it solves specific engineering challenges across various sectors. Its design choices make it a superior option where modern color TFTs may be unnecessary or even detrimental.
- CNC Machinery and PLC Panels: In high-noise industrial settings, the display’s monochrome clarity is paramount for viewing G-code, machine status, and control parameters without distraction. Its inherent robustness makes it ideal for the demanding environment of heavy machinery control systems.
- Test and Measurement Equipment: For oscilloscopes, spectrum analyzers, and network testers, data integrity is everything. The PG640400RA4 provides a stable, high-contrast platform for visualizing waveforms and critical measurements, ensuring that what the operator sees is accurate and artifact-free.
- Medical and Scientific Instrumentation: In applications like patient monitoring systems or laboratory equipment, reliability is a matter of safety and precision. This display offers a proven, dependable visual interface for essential data, minimizing the risk of misinterpretation.
Technical Specifications at a Glance
The following table outlines the core technical parameters for the Oki PG640400RA4. For comprehensive details and integration notes, you can review the full product datasheet.
| Parameter | Value |
|---|---|
| Manufacturer | Oki |
| Part Number | PG640400RA4 |
| Display Technology | FSTN (Film-compensated Super-twisted Nematic) LCD |
| Resolution | 640 x 400 Pixels |
| Display Mode | Transmissive, Negative Mode |
| Controller IC | Toshiba T6963C or compatible |
| Backlight | CCFL (Cold Cathode Fluorescent Lamp) |
| Interface | 8-bit parallel |
| Operating Temperature | 0°C to +50°C |
A Deeper Look at the Technology
Understanding the engineering choices behind the PG640400RA4 reveals why it remains a relevant component. The FSTN technology adds a special retardation film that corrects the inherent color shift of older STN displays. The direct benefit for an engineer is a significant boost in the contrast ratio, yielding a true black-and-white image that is sharp and easy to read from wider viewing angles. While the CCFL backlight is a mature technology, its strengths include exceptional brightness uniformity and a proven operational lifespan that often exceeds the equipment it serves. While it requires an external inverter, this design decouples the high-voltage components from the logic board, a valued feature in many industrial designs. For modern applications, engineers often compare this to solutions using energy-efficient LED backlights.
Frequently Asked Questions for Engineers
Is the Oki PG640400RA4 a suitable replacement for an older monochrome LCD in my equipment?
Very likely, yes. The key factors for compatibility are the 640x400 resolution and the T6963C controller interface. This controller was an industry standard for years, making the PG640400RA4 a strong candidate for a drop-in or near-drop-in replacement. We always recommend verifying the physical dimensions and connector pinout against your existing unit. If you need assistance matching a component, please contact our technical team.
What are the power requirements for this display?
The display system requires two distinct power sources. The logic circuitry and LCD controller need a standard +5V DC supply. The CCFL backlight requires a separate high-voltage AC supply, which is typically provided by a small, external inverter module. Ensuring this inverter is correctly specified and powered is critical for achieving optimal brightness and maximizing the display's operational life.
