Content last revised on November 20, 2025
Sharp LQ64D341: A Deep Dive into the 6.4-inch VGA Display for Industrial HMIs
Introduction to a Legacy of Reliability
The Sharp LQ64D341 is an a-Si TFT-LCD panel engineered for longevity and consistent performance in demanding industrial environments. This display delivers proven reliability for critical HMI and control applications through its robust CCFL backlight and straightforward parallel RGB interface. Its core specifications include 640x480 VGA Resolution | 300 cd/m² Brightness | 5.0V Input Voltage. Key benefits are its long-established track record in the field and a durable design rated for industrial operating temperatures. For systems requiring a compact, no-frills VGA interface with proven operational stability, the LQ64D341 offers a dependable solution. For applications demanding a different form factor or higher resolution, the LQ065Y5DG02 provides an alternative set of specifications.
Key Parameter Overview
Decoding the Specs for System Integration and Longevity
The specifications of the Sharp LQ64D341 are tailored for straightforward integration into legacy and new industrial systems where clarity, durability, and a standard interface are paramount. The combination of its physical dimensions, optical characteristics, and operational ratings makes it a workhorse for specific industrial applications.
| Parameter | Specification | Engineering Value |
|---|---|---|
| Panel Size | 6.4 inch | Provides a compact yet readable screen area suitable for control panels and portable instrumentation. |
| Resolution | 640(RGB)×480 (VGA) | A standard resolution that ensures compatibility with a wide range of industrial controllers and SBCs without requiring scaling. What is the benefit of its standard VGA resolution? It simplifies driver development and reduces system overhead. |
| Brightness | 300 cd/m² (Typ.) | Delivers sufficient luminance for indoor industrial environments like factory floors and control rooms. |
| Viewing Angle (L/R/U/D) | 70/70/40/70 (Typ.) | Offers adequate viewing flexibility for fixed-mount HMI applications where the operator's position is predictable. |
| Backlight System | 2 pcs CCFL, 50K hours lifetime (Typ.) | The dual CCFL backlight is a proven, long-life technology. Its 50,000-hour typical lifespan is analogous to a car engine designed to run reliably for over 200,000 miles, ensuring years of service before replacement is needed. |
| Operating Temperature | 0 ~ 55 °C | Built to withstand the thermal conditions found in most factory automation and process control settings. |
| Storage Temperature | -25 ~ 70 °C | Demonstrates resilience against extreme temperature swings during shipping or storage, reducing the risk of damage before deployment. |
| Signal Interface | Parallel RGB (1 ch, 6-bit) | A direct and low-latency interface common in industrial computing, simplifying the connection to embedded systems. This is a key feature for real-time control applications. |
Download the LQ64D341 datasheet for detailed specifications and performance curves.
Application Scenarios & Value
System-Level Benefits in Industrial Control and Instrumentation
The Sharp LQ64D341 is best suited for applications where reliability and long-term availability are more critical than cutting-edge resolution or features. Its robust design provides significant value in established industrial sectors.
A primary application is in Human-Machine Interfaces (HMIs) for factory automation and process control systems. An engineer's key challenge in this area is ensuring the display can be read clearly under various plant lighting conditions and can withstand the electrical and thermal environment of a control cabinet. The LQ64D341's 300-nit brightness and standard TFT-LCD technology directly address this, providing a clear and stable image for operators monitoring production lines or adjusting machine parameters. The 6.4-inch VGA format is a common replacement for aging CRTs in legacy CNC machines, offering a path to modernization without a complete system overhaul. Another excellent fit is in medical instrumentation and banking terminals, where the display must present critical data without fail for years. The panel's 50,000-hour backlight lifetime is a crucial parameter, ensuring low maintenance and high uptime for equipment that is costly to service. For systems that may require a wider operational temperature range, the LQ064V3DG06 presents an alternative option to evaluate.
Frequently Asked Questions (FAQ)
What is the primary advantage of the LQ64D341's CCFL backlight in an industrial context?
The Cold Cathode Fluorescent Lamp (CCFL) backlight is a mature, well-understood technology known for its long operational life, specified here at a typical 50,000 hours. For industrial applications, this translates to predictable performance and fewer maintenance cycles over the equipment's lifespan compared to earlier technologies.
How does the 6-bit parallel RGB interface impact system design?
This interface is a straightforward, direct-drive solution that minimizes latency and simplifies the driver circuitry. It is well-suited for embedded systems and single-board computers commonly used in industrial controllers, as it doesn't require complex signal conversion, which can streamline both hardware and software development.
Is the 100:1 contrast ratio sufficient for industrial HMI applications?
Yes, for its intended use. In many industrial control applications, the interface displays clear graphical elements, text, and numerical data rather than high-fidelity images. A 100:1 contrast ratio is adequate to provide clear differentiation between on/off states, active alarms, and critical readouts, ensuring operator readability.
An Engineer's Perspective
The Sharp LQ64D341 represents a class of components engineered for stability and function over flash. Its value is not in headline-grabbing specifications but in its predictable, reliable performance within a well-defined operational envelope. For engineers maintaining or designing systems for long-term deployment in industrial settings—such as process control, instrumentation, or as a legacy CRT replacement—this panel's standard VGA interface, robust thermal ratings, and proven backlight technology provide a low-risk, dependable solution that prioritizes uptime and ease of integration.
