Content last revised on February 6, 2026
TX20D34VM2BPB by KOE: An 8.0-inch WVGA Industrial LCD Engineered for Environmental Reliability
Introduction and Core Value Proposition
Engineered for Performance Where Consumer Displays Fail
The KOE TX20D34VM2BPB is an industrial-grade 8.0-inch a-Si TFT-LCD module specifically designed for applications demanding consistent performance across a wide thermal spectrum. With its core specifications of 8.0-inch | 800x480 WVGA | -20 to 70°C Operating Temperature, this display provides two crucial engineering benefits: exceptional environmental reliability and simplified system integration. It directly addresses the need for a robust HMI component that can function flawlessly in environments where standard displays would falter due to temperature extremes. For systems requiring dependable visual output in unconditioned industrial or vehicular settings, the TX20D34VM2BPB's wide operating range makes it a superior and reliable choice.
Key Parameter Overview
Decoding the Specifications for Operational Stability
The technical specifications of the TX20D34VM2BPB are foundational to its performance in demanding industrial applications. Each parameter is a testament to its design for reliability and clear visual output. Understanding these numbers is key to appreciating its value in a final system design.
| Display Characteristics | |
| Screen Size | 8.0 inches |
| Resolution | 800(RGB)×480, WVGA |
| Brightness | 400 cd/m² (Typ.) |
| Contrast Ratio | 600:1 (Typ.) |
| Viewing Angle | 80/80/80/80 (Typ.)(CR≥10) |
| Backlight Technology | WLED |
| Interface & Electrical Properties | |
| Signal Interface | CMOS (1 ch, 8-bit) + SPI |
| Supply Voltage | 3.3V (Typ.) |
| Mechanical & Environmental Ratings | |
| Module Dimensions | 183(W) × 112(H) × 6.3(D) mm |
| Active Area | 174(W) × 104.4(H) mm |
| Operating Temperature | -20 ~ 70 °C |
| Storage Temperature | -30 ~ 80 °C |
Application Scenarios & Value
System-Level Benefits in Industrial HMI and Control Systems
The TX20D34VM2BPB is optimally suited for integration into devices where operational uptime and environmental resilience are non-negotiable. Its primary value is demonstrated in environments with significant temperature fluctuations, such as factory floors, non-climate-controlled warehouses, and in-cab systems for agricultural or construction machinery. What is the primary benefit of its industrial-grade temperature range? Enhanced long-term reliability by eliminating performance degradation seen in consumer displays at low or high temperatures.
Consider a specific engineering challenge: designing a Human-Machine Interface (HMI) for a CNC milling machine located in a workshop that is cold in the winter and warm in the summer. A consumer-grade display could suffer from slow response times or backlight issues in the cold, and potential image retention or failure in the heat. The TX20D34VM2BPB's certified -20 to 70°C operating range directly solves this problem, ensuring the operator has a clear, responsive interface year-round without requiring costly and complex enclosure-level climate control. The 8.0-inch size and 800x480 WVGA resolution provide ample screen real-estate for displaying critical machine status, control menus, and diagnostic information with clarity. This robust performance is crucial for maintaining both productivity and operator safety.
While this model provides an excellent balance of features for many industrial tasks, for applications requiring a similar form factor but different interface or performance characteristics, the AT080TN64 presents an alternative set of specifications for engineering evaluation.
Technical Deep Dive
A Closer Look at the Design for Environmental Resilience
The exceptional reliability of the TX20D34VM2BPB is not accidental; it is a direct result of deliberate design choices in its materials and construction. The ability to operate from freezing to high heat stems from the use of industrial-grade liquid crystal fluid and polarizers that maintain their physical properties across this thermal range. Unlike standard materials that can become viscous in the cold or degrade under heat, these components ensure consistent pixel switching speed and color stability. This is a core topic explored in The Ultimate Guide to TFT-LCD, where the distinction between consumer and industrial builds is paramount.
Furthermore, the display's 600:1 contrast ratio plays a vital role in its practical usability. A contrast ratio of 600:1 means the brightest white is 600 times more luminous than the darkest black. In an HMI context, this is critical for legibility. It guarantees that crucial alerts, such as a red warning icon against a dark background, remain highly conspicuous and unambiguous. This prevents operator error, particularly under the variable lighting conditions common in industrial settings. Proper care, as outlined in guides on industrial display maintenance, will ensure this performance is sustained over the product's entire lifecycle.
Frequently Asked Questions
Engineering Questions & Design Considerations
How does the -20°C to 70°C operating range impact system design and total cost of ownership?
This wide operating range directly reduces system complexity and cost. It often eliminates the need for dedicated heating elements or cooling fans within the device enclosure that would be necessary to keep a consumer-grade display within its much narrower operating window (typically 0 to 50°C). This results in a lower bill of materials (BOM), reduced power consumption, fewer potential points of failure, and a more compact final product design.
What are the practical benefits of the dual CMOS and SPI interface?
The combination of a parallel CMOS interface for video data and a serial SPI interface for control offers significant design flexibility. Engineers can use the high-throughput CMOS bus exclusively for transmitting the pixel data needed to refresh the 800x480 screen, while using the simpler, low-pin-count SPI bus from a microcontroller for initialization, configuration, and command functions. This partitioning simplifies the printed circuit board (PCB) layout and can free up valuable GPIO pins on the host processor.
Is the 400 nit brightness sufficient for outdoor applications?
With a brightness of 400 cd/m² (nits), this display is ideal for indoor industrial environments, control rooms, and enclosed vehicle cabs. It provides excellent clarity under typical ambient lighting. For applications in direct, bright sunlight, a display with significantly higher brightness (typically 1000 nits or more) and specialized optical bonding would be recommended to ensure readability.
To evaluate if the TX20D34VM2BPB is the right fit for your specific industrial HMI or instrumentation project, our technical specialists are available to discuss your application's unique environmental and performance requirements. Contact us to request a quote or further details.