NEC NL2432HC22-40A | High-Brightness QVGA Display for Rugged HMIs
The NEC NL2432HC22-40A is a 3.5-inch transmissive color TFT-LCD module engineered for high-performance applications where visual clarity and operational reliability are non-negotiable. Designed specifically for industrial human-machine interfaces (HMIs), portable diagnostic equipment, and outdoor control panels, this display delivers exceptional image quality in a compact and durable package. Its combination of high brightness, a wide operating temperature range, and a standard digital interface makes it a versatile solution for new system designs and legacy equipment upgrades, ensuring long-term availability and stable performance in demanding environments.
At the core of its design is a focus on readability and resilience. The NL2432HC22-40A addresses the common engineering challenge of maintaining screen legibility under variable and high ambient lighting conditions. By integrating a powerful, long-life LED backlight system with robust thermal management, this module provides a dependable visual interface that functions consistently from cold-start conditions to peak operational heat loads. This makes it an ideal choice for systems that cannot afford downtime due to environmental constraints.
Technical Deep-Dive: Engineering for Clarity and Durability
Two key engineering specifications define the performance of the NEC NL2432HC22-40A: its high luminance and its wide operational temperature tolerance. The typical brightness rating of 700 cd/m² is achieved through a highly efficient white LED backlight array. This level of luminance ensures that the displayed information remains sharp and readable, even when exposed to factory overhead lighting or indirect sunlight. This feature is critical for creating effective sunlight readable HMIs, reducing operator error and improving safety in outdoor or brightly lit indoor settings. The anti-glare surface treatment further enhances viewability by diffusing reflections.
Equally important is the display's ability to operate flawlessly across a temperature range of -20 to 70 °C. This is not merely a component rating but a system-level design accomplishment. The liquid crystal fluid, driver ICs, and backlight unit are all specified to maintain stable performance, preventing issues like slow response times in the cold or image degradation in the heat. This wide temperature range makes the display suitable for unheated enclosures, vehicle cabins, and outdoor equipment, aligning with the requirements detailed in guides for reliable displays in heavy machinery. The robust design ensures a long operational life even with frequent thermal cycling.
Key Parameter Overview
| Parameter | Value |
|---|---|
| Screen Size | 3.5 inch (8.9 cm) |
| Resolution | 240(RGB) x 320 (QVGA) |
| Technology | a-Si TFT-LCD, Transmissive |
| Brightness | 700 cd/m² (Typical) |
| Contrast Ratio | 300:1 (Typical) |
| Viewing Angle (H/V) | 120° / 100° |
| Interface | CMOS (1 ch, 6-bit) |
| Operating Temperature | -20 to 70 °C |
| Storage Temperature | -30 to 80 °C |
| Backlight | White LED |
Application Scenarios and Engineering Value
The specific feature set of the NL2432HC22-40A provides direct solutions to challenges in several key applications. In portable medical and diagnostic devices, its high brightness allows healthcare professionals to clearly read critical data in various clinical settings. For industrial automation, this rugged HMI display can be integrated into control panels on manufacturing floors where reliability and resistance to temperature fluctuations are essential. Furthermore, in outdoor applications such as fuel pumps, EV charging stations, and information kiosks, the display's excellent readability and durable construction ensure a positive user experience and long service life, reducing the total cost of ownership.
Frequently Asked Engineering Questions
Q1: What are the primary considerations when interfacing with the NL2432HC22-40A display?
A1: The display uses a standard 45-pin FPC connector with a 6-bit parallel RGB CMOS interface. Engineers should ensure their controller board provides the correct timing signals and logic levels (typically 3.3 V). The datasheet provides detailed timing diagrams that are crucial for proper integration to avoid issues like flickering or data corruption.
Q2: How is the LED backlight driven and controlled?
A2: The backlight is an integrated unit requiring a separate power supply. The datasheet specifies the forward voltage and current for the LED string. Brightness can be controlled via Pulse Width Modulation (PWM) applied to the LED driver circuit, allowing for dimming to suit ambient conditions or to conserve power in battery-operated devices.
For detailed integration support or to discuss how the NEC NL2432HC22-40A can meet the demands of your project, please contact our technical team or explore our full range of industrial LCD displays.
