Content last revised on November 17, 2025
LTD056EV7F: 5.6-inch 640x480 CCFL TFT-LCD for Industrial & Medical Applications
Product Overview: LTD056EV7F
Delivering Proven Performance for Demanding Visual Interface Requirements
The LTD056EV7F is a 5.6-inch a-Si TFT-LCD module engineered for exceptional visual clarity and reliable performance in established industrial and medical systems. This display provides a robust solution for human-machine interfaces (HMIs), diagnostic equipment, and specialized instrumentation requiring a standard 4:3 aspect ratio and VGA resolution. Its key specifications include a 640x480 pixel format, a luminance of 200 cd/m², and a contrast ratio of 250:1, ensuring clear and discernible image quality. The integrated CCFL backlight system is designed for longevity and consistent illumination. What is the primary benefit of its standard interface? It allows for straightforward integration into existing system architectures, minimizing redesign efforts for legacy equipment upgrades.
Key Parameter Overview
Decoding the Specs for System Integration and Visual Performance
The technical specifications of the LTD056EV7F are tailored for embedded applications where clarity, reliability, and form factor are critical decision drivers. The following parameters highlight the display's capabilities for straightforward implementation.
| Display Characteristics | |
|---|---|
| Screen Size | 5.6 inches (14.2 cm) |
| Resolution | 640(RGB) x 480 [VGA] |
| Aspect Ratio | 4:3 (Width:Height) |
| Pixel Pitch | 0.0588 x 0.1764 mm (W x H) |
| Active Area | 112.896 x 84.672 mm (W x H) |
| Optical & Electrical Performance | |
| Luminance | 200 cd/m² (Typical) |
| Contrast Ratio | 250:1 (Typical) |
| Viewing Angle | 45/45/15/35 (L/R/U/D) (Typical) |
| Display Colors | 262K (6-bit) |
| Backlight System | 1 pc Cold Cathode Fluorescent Lamp (CCFL) |
| Interface Type | Parallel RGB (1 ch, 6-bit) |
| Mechanical & Environmental | |
| Module Dimensions | 131.0 x 102.2 x 7.6 mm (W x H x D) |
| Operating Temperature | 0 ~ 50 °C |
| Storage Temperature | -20 ~ 60 °C |
Application Scenarios & Value
System-Level Benefits in Industrial Control and Test Equipment
The LTD056EV7F is an excellent fit for applications that prioritize stability, longevity, and ease of integration over cutting-edge resolution or touch features. Its VGA resolution and parallel RGB interface make it a prime candidate for drop-in replacements or upgrades in legacy systems, significantly extending the service life of capital equipment without requiring a complete redesign of the host controller or software.
Consider the engineering challenge of maintaining a fleet of aging CNC machines or portable medical analyzers. The original displays may be failing, but the core processing units are still functional. The LTD056EV7F's standard 5.6-inch form factor and electrical interface allow for a direct replacement path, minimizing downtime and validation costs. Its 250:1 contrast ratio provides sufficient clarity for displaying critical process parameters and waveforms in typical indoor industrial environments, a core requirement for a functional industrial HMI. This is analogous to replacing a car's standard halogen headlight bulb; you don't need to re-engineer the car's electrical system, you simply install a component with the same form and function to restore original performance.
Technical Deep Dive
A Closer Look at the CCFL Backlight and Interface Design
The choice of a Cold Cathode Fluorescent Lamp (CCFL) as the backlight source is a key design aspect of the LTD056EV7F, tailored for industrial environments of its era. Unlike modern LED backlights, CCFLs require an external inverter to generate the high voltage needed for operation. While this adds a component to the system bill of materials, CCFL technology offers a very stable color temperature over its operational life, a critical factor in medical imaging or color-sensitive monitoring applications where color consistency is paramount. What is the operational lifespan of the CCFL? The backlight is rated for a typical lifetime that aligns with the long-term operational requirements of industrial machinery.
Furthermore, the 6-bit parallel RGB interface is a fundamental and robust communication method. It transmits color data for each pixel directly over dedicated lines, resulting in a lag-free display with predictable timing behavior. This simplicity is a major advantage in system diagnostics and verification. For engineers working on systems where electromagnetic compatibility (EMC) is a concern, the well-understood characteristics of a parallel interface can be easier to manage compared to the high-speed differential signaling of interfaces like LVDS. This straightforward design philosophy ensures that system integration is a deterministic process, reducing unforeseen complexities during the development cycle.
Frequently Asked Questions (FAQ)
What is the primary advantage of the LTD056EV7F's VGA resolution for embedded systems?
The 640x480 VGA resolution is a widely supported industry standard. This ensures compatibility with a vast range of off-the-shelf single-board computers (SBCs), microcontrollers, and graphics processors without requiring special drivers or scaling algorithms, simplifying software development and hardware integration.
How does the specified viewing angle of 45/45/15/35 (L/R/U/D) influence its suitability for specific applications?
This specification indicates that the optimal viewing experience is from straight on and from the sides. The narrower vertical viewing angle (especially from the top) suggests the display is best suited for fixed-mount applications where the operator's viewing position is predictable, such as a control panel on a factory machine or a benchtop test instrument, rather than a mobile device.
