Sharp LQ121S1DG31 | Engineered for Longevity in Industrial HMIs
The Sharp LQ121S1DG31 is a 12.1-inch SVGA TFT-LCD panel engineered for exceptional reliability and long-term performance in demanding industrial environments. It represents a cornerstone solution for applications where stability, consistency, and backward compatibility are paramount. This display is not merely a component but a strategic asset for extending the operational life of critical systems.
- Proven Reliability: Built with robust a-Si TFT (Amorphous Silicon) technology for stable, long-term operation.
- Industrial-Grade Performance: Features an 800x600 SVGA resolution and 300 cd/m² brightness, delivering clear and concise visuals for industrial control interfaces.
- Extended Life Backlight: Equipped with a long-life CCFL backlight system rated for 50,000 hours, ensuring sustained performance in legacy systems.
- Wide Operating Range: Designed to withstand challenging industrial conditions with a specified operating temperature range.
Key Technical Specifications
The technical parameters of the Sharp LQ121S1DG31 are optimized for industrial HMIs, measurement instruments, and POS systems where proven performance outweighs cutting-edge specifications. For comprehensive details, you can Download the Datasheet.
| Parameter | Value |
|---|---|
| Manufacturer | Sharp |
| Model | LQ121S1DG31 |
| Screen Size | 12.1 inches |
| Resolution | 800(RGB)×600 [SVGA] |
| Display Technology | a-Si TFT-LCD, Normally White, Transmissive |
| Luminance | 300 cd/m² (Typ.) |
| Contrast Ratio | 300:1 (Typ.) |
| Viewing Angle (L/R/U/D) | 60/60/45/55 (Typ.) |
| Backlight System | CCFL (Cold Cathode Fluorescent Lamp) |
| Signal Interface | Parallel RGB (1 ch, 6-bit) |
| Operating Temperature | 0°C to 50°C |
| Outline Dimensions | 276(W) × 209(H) × 14(D) mm |
Application Focus: The Engineering Value of Legacy System Support
In an industry focused on constant innovation, the Sharp LQ121S1DG31 provides a different but equally critical value: stability. For countless systems in manufacturing, medical, and test and measurement fields, this panel is a key component for maintenance and repair, offering a direct replacement that avoids the costly and time-consuming process of complete system requalification.
- Industrial HMI & Control Panels: The SVGA resolution is perfectly suited for displaying critical process data, schematics, and control menus. Its proven CCFL backlight and parallel interface ensure seamless integration into existing hardware architectures, minimizing downtime and engineering effort. This makes it an ideal choice for legacy support in heavy machinery and automation.
- Medical and Laboratory Equipment: Medical devices often have product lifecycles spanning over a decade. The LQ121S1DG31 offers a form-fit-function replacement for displays in diagnostic machines and monitoring equipment, preserving regulatory approvals and extending the utility of high-value capital assets.
- Point-of-Sale (POS) and Kiosks: For embedded systems designed years ago, this display serves as a reliable field-replaceable unit. Its robust construction and antiglare surface ensure readability and durability in commercial use.
Technical Deep Dive: CCFL Backlight and a-Si TFT Technology
The core of the LQ121S1DG31's value proposition lies in its deliberate use of established technologies. The panel utilizes an a-Si TFT-LCD, a technology known for its mature manufacturing process and predictable performance, making it a workhorse for industrial applications.
A key feature is its CCFL backlight. While many new designs have transitioned to LED, CCFL-based systems are integral to a vast installed base of industrial equipment. The LQ121S1DG31's CCFL system was designed for a long operational life of 50,000 hours and provides a specific spectral output that many older optical sensors and machine vision systems were calibrated for. Switching to an LED backlight in such cases could require significant software and hardware adjustments. Therefore, the LQ121S1DG31 isn't just a display; it's a compatibility solution. For a deeper understanding of display technologies, explore our Ultimate Guide to TFT-LCD.
Frequently Asked Questions (FAQ)
Q: Why would I choose a CCFL display like the LQ121S1DG31 over a modern LED panel?
A: The primary reason is for legacy system support. If your existing equipment was designed and certified with a CCFL-backlit display, using the LQ121S1DG31 as a replacement part is the most efficient solution. It eliminates the need to re-engineer the power supply (CCFL requires a high-voltage inverter, while LED uses a DC driver), modify the housing, or recalibrate system performance, saving significant time and cost.
Q: Is the CCFL lamp user-replaceable?
A: Yes, the datasheet for the LQ121S1DG31 indicates that the CCFL backlight assembly is designed to be replaceable. This is a critical feature for extending the service life of the display module in applications where it operates for extended periods.
Q: What are the main considerations when integrating this display?
A: The two main considerations are the signal interface and the backlight power. The display uses a 41-pin Parallel RGB (6-bit) interface, which is common in older industrial motherboards. Crucially, you will need an external CCFL inverter to power the backlight; this component is not integrated into the display module.
