20x4 LCD Character LCD Module FSTN Positive Display With Backlight ST7066
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The 20x4 LCD Character Module is a versatile 5.0-inch display solution designed to present up to 80 characters across four lines, with each line accommodating 20 dark-pattern characters. This 20x4 LCD Character Module features a semi-transmissive LCD technology, enabling excellent readability in both natural and artificial ambient light through reflective properties, while an integrated LED backlight ensures clear visibility in dark environments. With a wide operating temperature range from -20°C to 70°C, this 20x4 LCD Character Module is built for industrial control systems, medical devices, and consumer electronics.
The module offers multiple polarizer options: STN(+) with yellow-green background and dark characters, FSTN(+) for highest contrast (white background, black characters), DFSTN(-) for wide viewing angle (black background, white/gray characters), and STN(-) for blue background with white characters. Its optimal viewing direction is 6 o’clock (6H), meaning best readability when tilted from the bottom. The display driver chip is ST7066U, compatible with parallel MCU interfaces via 16 pins. The 20x4 LCD Character Module operates at 5V DC, complies with RoHS, and features anti-static ESD protection up to 8KV. Backlight color options include white, blue, green, yellow-green, and red, depending on the variant.
Whether you need a reliable display for outdoor equipment or a backlit unit for dim control rooms, this 20x4 LCD Character Module balances power efficiency (5V supply) and ruggedness, making it a top choice for engineers and makers.
Specification of the 20x4 LCD Character LCD Module FSTN Positive Display With Backlight ST7066
Six Key Advantages of This 20x4 LCD Character Module
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Exceptional Ambient Readability The semi-transmissive design of this 20x4 LCD Character Module allows sunlight or indoor lighting to reflect off the glass panel, eliminating backlight dependency in bright conditions. This saves energy and extends product life.
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Integrated LED Backlight for Darkness When ambient light fades, the 20x4 LCD Character Module’s LED backlight activates to transmit light through the display, ensuring crisp character visibility in complete darkness—ideal for night-use equipment.
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Wide Temperature Tolerance Rated from -20°C to 70°C, this 20x4 LCD Character Module performs reliably in freezing storage facilities or hot industrial environments without contrast degradation.
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Multiple Display Modes & Colors Choose from STN(+), FSTN(+), DFSTN(-), or STN(-) polarizers. Each 20x4 LCD Character Module variant offers distinct background/character contrasts, including yellow-green, white, black, or blue backgrounds, tailored to your application.
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High-Contrast Optics at 6H Direction Engineered for best viewing from the 6 o’clock direction, this 20x4 LCD Character Module delivers sharp, dark characters on a contrasting background when viewed normally tilted from bottom—perfect for dashboard or panel mounting.
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Robust ESD Protection & RoHS Compliance With 8KV anti-static protection, this 20x4 LCD Character Module withstands electrostatic discharge events common in industrial settings. RoHS compliance ensures environmental safety.
Developer Integration Conveniences of This 20x4 LCD Character Module
The 20x4 LCD Character Module is designed to simplify development workflows, especially for Arduino and MCU-based projects. First, its 5V logic supply matches standard Arduino boards (Uno, Mega, Nano) without needing level shifters. The 16-pin parallel interface follows the classic HD44780 (compatible with ST7066U), so existing LiquidCrystal libraries work out-of-the-box. Developers can initialize the 20x4 LCD Character Module with just a few lines of code, displaying text, custom characters, or sensor data in minutes.
Second, the 6H viewing angle ensures that when the module is mounted on a flat surface (e.g., a control panel), users naturally view it from slightly below—no awkward head tilting. Third, flexible backlight options (white, blue, etc.) allow software-controlled on/off and PWM dimming via an Arduino pin, reducing power in battery-operated devices. Fourth, the wide operating temperature range eliminates external heating/cooling components for most indoor/outdoor projects. Fifth, anti-static ESD 8KV protection means fewer failures during handling or assembly. Finally, the standard 146×62.5 mm footprint and 2.54mm pin headers fit common breadboards and prototype shields, enabling rapid iteration. Whether you’re building a custom industrial terminal or a school project, this 20x4 LCD Character Module reduces integration time from days to hours.