The part number **240128-06-SL-R-ST-LED-WH** refers to a specific **Graphic Liquid Crystal Display (LCD) Module**. Based on standard naming conventions for industrial display modules, here is a detailed breakdown of its electronic components and specifications. ### 1. General Specifications This module is a monochromatic graphic display commonly used in industrial controllers, medical devices, and instrumentation. | Feature | Specification | | :--- | :--- | | **Resolution** | 240 x 128 Pixels | | **Display Technology** | STN (Super-Twisted Nematic) | | **Backlight Type** | LED (Light Emitting Diode) | | **Backlight Color** | White (WH) | | **Polarizer Mode** | Reflective or Transflective (R) | | **Controller Type** | Usually RA8835, T6963C, or equivalent | --- ### 2. Electronic Component Breakdown #### A. The LCD Glass (STN) The "STN" indicates the liquid crystal material. STN displays offer a higher contrast and wider viewing angles compared to older TN displays. The **240x128** resolution allows for complex graphics, icons, and multiple lines of text simultaneously. #### B. The Backlight (LED-WH) * **Voltage:** Typically requires **3.0V to 3.5V DC**. * **Current:** Usually draws between **45mA and 120mA** depending on brightness settings. * **Color:** White LEDs use a blue emitter with a yellow phosphor coating to produce a neutral white light, improving readability in dark environments. #### C. Integrated Controller / Driver The module includes a built-in controller (often a **T6963C** or **RA8835**) which handles the complex timing required to refresh the pixel matrix. * **Interface:** Usually an 8-bit parallel interface (compatible with 8080 or 6800 series MPUs). * **Character Generator:** Most include a built-in ROM for standard ASCII characters. #### D. Power Requirements * **Logic Voltage ($V_{DD}$):** Typically +5.0V (some newer versions support +3.3V). * **LCD Driving Voltage ($V_{LCD}$):** High-resolution displays often require a negative voltage (e.g., -15V to -22V) to maintain contrast. Many modules include a DC-DC converter to generate this internally. --- ### 3. Pinout Configuration (Common) While specific pinouts can vary by manufacturer, a standard 240128 module usually follows this logic: | Pin | Symbol | Function | | :--- | :--- | :--- | | 1 | FGND | Frame Ground | | 2 | VSS | Ground (0V) | | 3 | VDD | Power Supply for Logic (+5V) | | 4 | V0 | Contrast Adjustment | | 5 | WR | Write Signal | | 6 | RD | Read Signal | | 7-14 | DB0-DB7 | Data Bus Lines | | 15 | CE | Chip Enable | | 16 | RST | Hardware Reset | | 17 | VEE | Negative Voltage Output | --- ### 4. Part Number Suffix Meanings * **240128:** Resolution (Width x Height). * **SL:** Small Outline or Slim Design (Manufacturer specific). * **R:** Reflective or Transflective (viewable in sunlight). * **ST:** STN Technology. * **LED-WH:** White LED Backlight.