## Sharp LQ064V3DG04 | Robust 6.4" VGA TFT for Industrial HMIs
The Sharp LQ064V3DG04 is a testament to the engineering principle of "if it isn't broken, don't fix it." This 6.4-inch VGA color TFT-LCD module delivers the proven reliability and performance required for critical industrial human-machine interfaces (HMIs), process controllers, and legacy system retrofits. It is engineered not for the latest consumer trends, but for long-term operational stability in demanding environments where clarity, consistency, and durability are non-negotiable.
Key Performance Highlights
The LQ064V3DG04 is purpose-built for industrial utility, providing engineers with a component they can trust:
- Classic VGA Resolution (640x480): Delivers sharp, clear rendering of numerical data, status indicators, and control menus, providing the necessary detail for industrial monitoring without unnecessary pixel density.
- CCFL Backlight Technology: Utilizes a Cold Cathode Fluorescent Lamp, a mature technology known for its stable, uniform illumination and predictable performance over its service life.
- Standard Digital Interface: Features a parallel 8-bit RGB data interface, ensuring straightforward integration with a wide range of industrial motherboards and single-board computers.
- Anti-Glare Surface Treatment: Minimizes reflections from overhead factory lighting, improving operator visibility and reducing eye strain during long shifts.
Key Parameter Overview
This table provides engineers with a quick reference to the core specifications of the Sharp LQ064V3DG04. For a complete breakdown of all electrical and mechanical characteristics, you can download the official LQ064V3DG04 datasheet.
| Parameter | Specification |
|---|---|
| Screen Size | 6.4 inch |
| Resolution | 640(RGB) × 480 [VGA] |
| Technology | a-Si TFT-LCD, Transmissive |
| Luminance | 200 cd/m² (Typ.) |
| Contrast Ratio | 250:1 (Typ.) |
| Viewing Angle | 60/60/40/60 (L/R/U/D) |
| Backlight System | 1 pc CCFL (Requires Inverter) |
| Operating Temperature | 0 ~ 50 °C |
Engineering Insights: Backlight and Viewing Cone
While modern displays often feature LED backlights, the CCFL system in the LQ064V3DG04 offers a distinct advantage in specific contexts: predictability. For engineers servicing or recertifying existing equipment, using a component with a well-documented performance profile minimizes validation efforts. The CCFL requires an external inverter, a standard design consideration for this class of display, but rewards the system with even light distribution, crucial for consistent color and brightness across the screen—a key factor in process control visualization. Understanding the fundamentals of TFT-LCD technology helps in appreciating these design trade-offs.
A critical detail for system integrators is the asymmetrical vertical viewing angle (Up: 40°, Down: 60°). This specification implies that the display is optimized for viewing from straight-on or a slightly elevated position. This is a deliberate design choice for fixed-mount HMIs, such as those on a factory floor control console or a wall-mounted panel, where the operator's viewing position is predictable. Factoring this into the mechanical design of the enclosure ensures optimal readability for the end-user.
Application Scenarios & Value Proposition
The Sharp LQ064V3DG04 excels in applications where proven technology is valued over cutting-edge specs:
- Legacy Equipment Retrofits: Its standard 6.4" VGA footprint and parallel interface make it an ideal candidate for replacing aging or failed displays in CNC machines, injection molding controllers, and other industrial automation systems, extending the life of valuable capital equipment.
- Process Control Panels: In environments like water treatment plants or chemical processing facilities, the display's clarity and reliability ensure that operators have a constant, trustworthy view of system status.
- Test and Measurement Equipment: For benchtop instruments, the anti-glare screen and robust construction provide a dependable user interface that withstands the rigors of a lab or workshop environment. Ensuring proper maintenance and handling will further guarantee its long service life.
Engineer's FAQ for the LQ064V3DG04
Does this display require an external inverter for the backlight?Yes. The Sharp LQ064V3DG04 uses a Cold Cathode Fluorescent Lamp (CCFL) as its light source, which requires a separate, compatible inverter to supply the necessary high voltage. This is a standard architecture for displays of this type and era.
Is this model a direct drop-in replacement for other 6.4" VGA panels?Potentially, but verification is crucial. While the resolution and screen size are standard, engineers must meticulously compare the mechanical mounting points, the specific pinout of the 31-pin data connector, and the electrical requirements of the CCFL with the component being replaced. For specific integration challenges or to confirm compatibility, we highly recommend you contact our technical team for expert guidance.
