Content last revised on November 20, 2025
AT070TN07: Engineering Review of a 7.0" WVGA Display for Industrial HMI & Embedded Systems
A Technical Analysis of the Innolux (Formerly CMO) 800x480 TFT-LCD Module
The AT070TN07 is a 7.0-inch WVGA display engineered for streamlined integration and dependable performance in industrial applications. This amorphous silicon TFT-LCD panel delivers a functional and reliable visual interface with key specifications of 800x480 Resolution | -20 to 70°C Operating Temperature | Parallel RGB Interface. Its primary engineering benefits include a simplified system design and robust operation in harsh thermal environments. For engineers, its integrated timing controller and standard parallel interface significantly reduce the complexity of connecting to embedded processors. For embedded systems requiring a robust, cost-effective WVGA display, the AT070TN07 offers a proven path to market.
Application Scenarios & Value
System-Level Benefits in Industrial HMI and Portable Instrumentation
The AT070TN07 is engineered for applications where reliability and straightforward implementation are paramount. Its feature set makes it a strong candidate for a range of demanding environments. What is the key integration feature of the AT070TN07? Its integrated timing controller simplifies the connection to host processors.
A primary application is in the development of Human-Machine Interface (HMI) panels for industrial control systems. In this context, an engineer faces the challenge of creating a clear, responsive GUI that can withstand the temperature fluctuations of a factory floor. The AT070TN07's wide operating temperature range of -20 to 70°C directly addresses this requirement, ensuring consistent performance without the need for complex and costly heating or cooling subsystems. Its 800 x 480 WVGA resolution provides sufficient detail for displaying process data, schematics, and soft-key controls without demanding excessive processing power from the host controller.
Another key scenario is in portable diagnostic and measurement equipment. These devices must be dependable whether used in an air-conditioned laboratory or outdoors. The display's robust thermal characteristics and anti-glare surface treatment ensure the screen remains readable and operational across these varied conditions, enhancing usability for field technicians. The module's standard Parallel RGB interface also simplifies the connection to the single-board computers (SBCs) or microcontrollers commonly used in such portable designs.
While the 7.0-inch AT070TN07 is ideal for compact devices, for applications needing a slightly larger screen, the related AT080TN64 provides an 8.0-inch alternative. For systems requiring different interface or performance characteristics, the G070ACE-L01 presents another option within the 7.0-inch category.
Key Parameter Overview
Decoding the Specifications for System Integration
The technical specifications of the AT070TN07 are tailored for performance and integration efficiency in embedded systems. The parameters below highlight the module's capabilities, grouped by function to aid in design evaluation. A crucial specification is the operating temperature range, which directly impacts the potential applications and long-term reliability of the end product. Think of this range like the all-season tires on a vehicle. While standard "summer tires" (consumer-grade displays) may fail in the cold, this display's -20 to 70°C range ensures it performs reliably whether the end device is in a refrigerated warehouse or a sun-baked vehicle cabin.
| Display Characteristics | |
|---|---|
| Screen Size | 7.0 inch |
| Resolution | 800(RGB) x 480 [WVGA] |
| Luminance | 250 cd/m² (Typ.) |
| Contrast Ratio | 500:1 (Typ.) |
| Viewing Angle | 70/70/50/70 (U/D/L/R) |
| Display Colors | 262K (6-bit) |
| Backlight | WLED |
| Surface Treatment | Anti-glare |
| Interface & Electrical | |
| Signal Interface | Parallel RGB (1 ch, 6-bit), 40 pins, FPC |
| Logic Voltage (VCC) | 3.3V (Typ.) |
| Input Current for Logic | 163/183mA (Typ./Max.) |
| Mechanical & Environmental | |
| Module Dimensions | 165(W) x 104(H) x 5.5(D) mm |
| Active Area | 152.4(W) x 91.44(H) mm |
| Operating Temperature | -20 ~ 70 °C |
| Storage Temperature | -30 ~ 80 °C |
Download the AT070TN07 datasheet for detailed specifications and performance curves.
Frequently Asked Questions
Engineering Questions on Implementation and Performance
What is the primary benefit of the integrated timing controller (TCON) in the AT070TN07?
The integrated TCON is a significant advantage for system designers. It manages the complex timing signals required by the gate and source drivers of the LCD panel internally. This means the host processor only needs to supply standard digital RGB data along with basic synchronization signals (HSYNC, VSYNC, DE), simplifying mainboard design, reducing the bill of materials (BOM), and shortening development cycles.
How does the -20°C to 70°C operating temperature affect system design for outdoor or industrial use?
This wide temperature range greatly expands the viable applications for any device using this display. It provides engineers with the confidence that the display will not fail in cold-start conditions or overheat in high-ambient-temperature environments. This reduces the need for external thermal management solutions like heaters or fans, which saves cost, power, and physical space within the product enclosure, making it ideal for sealed or compact industrial devices.
What are the typical drive voltage requirements for the AT070TN07's logic and backlight?
The module requires a typical logic supply voltage (VCC) of 3.3V, which is a common voltage rail in modern embedded systems. The white LED backlight is powered separately, and its specific forward voltage and current requirements can be found in the official datasheet. A dedicated LED backlight driver circuit is typically required to provide a constant current for stable and efficient brightness control.
Technical Deep Dive
A Closer Look at the Parallel RGB Interface for Embedded System Design
A defining feature of the AT070TN07 from a system architecture perspective is its 40-pin Parallel RGB interface. This interface provides a direct, low-latency pathway for video data from the host processor's graphics or display controller to the display module itself. It's a well-established standard in the embedded world, particularly for displays in the sub-10-inch category.
The Parallel RGB interface acts like a multi-lane highway directly connecting the processor to the display. Each lane carries a specific color (e.g., R0-R5, G0-G5, B0-B5 for 18-bit color) or timing signal, resulting in high-speed, direct data transfer. This is in contrast to serial interfaces like MIPI DSI, which are more like a single-lane road where data must be packaged and sent sequentially, adding protocol overhead and potential latency. For many real-time industrial control and Point of Sale (POS) terminal applications, the directness of a parallel interface is a significant advantage, ensuring that updates to the screen happen with minimal delay.
This design choice simplifies the hardware and software driver development. Many microcontrollers and SoCs designed for HMI applications have a built-in LCD-TFT controller peripheral that can directly output the required RGB and sync signals, allowing for a nearly direct connection to the AT070TN07's FPC connector. This eliminates the need for intermediate bridge chips, reducing both BOM cost and board complexity.
For detailed technical inquiries or to discuss how the AT070TN07 can fit into your specific application, please contact our engineering support team for guidance. Our role is to provide the critical data you need to make informed design and procurement decisions.
