Content last revised on January 31, 2026
SX14Q005 Hitachi 5.7-inch 320x240 QVGA Industrial STN LCD Display
The SX14Q005, manufactured by Hitachi (Kaohsiung Hitachi Electronics), is a 5.7-inch industrial-grade STN-LCD module specifically engineered for high-reliability human-machine interface (HMI) applications. Operating at a 320x240 QVGA resolution, this display offers a proven amorphous silicon thin-film transistor architecture designed for stability in legacy industrial environments. It features a CCFL backlight system and a 4-bit parallel interface, making it a critical component for maintaining and repairing existing automation hardware. For legacy 5.7-inch industrial controllers requiring 320x240 resolution and proven STN reliability, the SX14Q005 remains an essential drop-in display solution.
UVP: High-contrast industrial stability for legacy HMI systems with 5.7-inch form-factor compatibility.
- Top Specs: 5.7-inch | 320 x 240 (QVGA) | STN-Blue Mode
- Key Benefit 1: Direct drop-in compatibility for legacy industrial automation equipment.
- Key Benefit 2: High contrast ratio of 25:1 for clear monochrome text.
What is the primary advantage of the SX14Q005 STN architecture? It provides stable, high-contrast readability in legacy monochrome control environments without the complexity of modern color-active matrices.
Key Parameter Overview
Decoding the Specs for Enhanced Industrial Reliability
The following technical specifications define the operating envelope of the SX14Q005. Understanding these parameters is vital for ensuring electrical compatibility and thermal management in enclosed control panels.
| Parameter | Specification |
| Manufacturer | Hitachi (JDI/Kaohsiung Hitachi) |
| Model Number | SX14Q005 |
| Screen Size | 5.7-inch (Diagonal) |
| Resolution | 320 x 240 (QVGA) |
| Display Type | STN-LCD (Super-Twisted Nematic) |
| Luminance | 110 cd/m² (Typical) |
| Contrast Ratio | 25:1 (Typical) |
| Interface Type | 4-bit Parallel |
| Backlight Type | CCFL (Single Lamp) |
| Operating Temp | 0°C to +50°C |
Application Scenarios & Value
Ensuring Operational Continuity in Legacy Automation Environments
Engineers often face the challenge of maintaining aging infrastructure where the original display components have reached end-of-life. The SX14Q005 addresses this by providing a reliable, standardized 5.7-inch display that fits perfectly into existing cutouts of CNC machines, PLC units, and medical diagnostic equipment. Its STN-Blue mode is particularly effective for high-glare industrial floors where high-contrast monochrome text is easier to read than low-end color screens.
In high-fidelity engineering scenarios, such as the maintenance of an industrial conveyor system, the 4-bit parallel interface of the SX14Q005 allows for direct integration with older 8-bit or 16-bit microcontrollers without requiring signal conversion. This simplifies the repair process and reduces the risk of electromagnetic interference (EMI) issues often found in more complex digital upgrades. For systems requiring larger display areas or different resolutions, neutral alternatives like the LQ104V1LG61 offer different form factors while maintaining industrial-grade ruggedness.
The SX14Q005 is frequently deployed in:
- CNC Control Panels: Where vibration resistance and text clarity are paramount.
- Medical Monitors: Utilizing the high-contrast STN mode for clear vital sign readouts.
- Legacy PLCs: Maintaining the 320x240 resolution standard for older software interfaces.
Technical Deep Dive
A Closer Look at STN Architecture for Long-Term Industrial Durability
The SX14Q005 utilizes Super-Twisted Nematic (STN) technology, which offers a broader viewing angle and higher contrast than standard TN displays. This is achieved by increasing the twist angle of the liquid crystal molecules to 180–270 degrees. For an engineer, this translates to better readability from off-center positions, which is common in floor-mounted industrial HMI consoles. Understanding the difference between these technologies is explored in our ultimate guide to industrial displays.
The integration of a CCFL (Cold Cathode Fluorescent Lamp) backlight in the SX14Q005 provides a uniform brightness of 110 cd/m². While modern displays often use LED, the CCFL system in the SX14Q005 is designed to match the inverter specifications of legacy hardware, preventing the need for costly power supply redesigns. Designers must ensure proper thermal management as CCFL lamps generate more heat at the lamp ends compared to LED arrays; maintaining an internal enclosure temperature below +50°C is critical for maximizing the display's lifespan. Furthermore, the 4-bit parallel data bus requires precise timing synchronization, a factor often discussed in HMI engineering guides.
FAQ
How does the 25:1 contrast ratio of the SX14Q005 affect visibility in bright industrial lighting?
The 25:1 contrast ratio, combined with the STN-Blue mode, ensures that characters remain distinct and sharp even under overhead industrial fluorescent lighting, which typically washes out low-contrast screens.
What are the power requirements for the CCFL backlight in the SX14Q005?
The CCFL lamp typically requires a high-voltage AC inverter (approx. 500-800Vrms startup). Engineers must verify that the existing inverter in their system matches the lamp current specifications of the SX14Q005 to avoid premature lamp failure.
Is the SX14Q005 compatible with standard LVDS controllers?
No, the SX14Q005 uses a 4-bit parallel interface. For conversion to LVDS or modern digital standards, an intermediate timing controller or bridge chip would be required.
For more technical insights into maintaining industrial systems, visit our resources on Industrial Display Engineering or contact our technical support team for detailed integration assistance.