The **FW70W-R100-KB** is an industrial-grade resistive touch display module, commonly used in embedded systems, POS terminals, and human-machine interfaces (HMI). Below is a detailed breakdown of its electronic components and specifications. ### 1. Core Display Specifications The module is built around a 7.0-inch TFT LCD panel. Its primary electronic characteristics include: | Parameter | Specification | | :--- | :--- | | **Screen Size** | 7.0 Inches (Diagonal) | | **Resolution** | 800 x 480 Pixels (WVGA) | | **Interface Type** | Digital RGB (24-bit) | | **Brightness** | ~300 - 400 cd/m² | | **Contrast Ratio** | 500:1 | | **Backlight Type** | LED (White) | --- ### 2. The Touch Panel Component (R100-KB) The "R100-KB" suffix typically denotes the specific **Resistive Touch** layer integrated into the assembly. * **Technology:** 4-Wire Analog Resistive. * **Layer Composition:** A flexible top film (ITO-coated) and a rigid bottom glass substrate (ITO-coated) separated by spacer dots. * **Controller Interface:** Usually connects via an FPC (Flexible Printed Circuit) cable to a touch controller IC (like the AR1100 or TSC2007). * **Input Sensitivity:** Responds to pressure from any object (stylus, gloved finger, or fingernail). --- ### 3. Electronic Interface & Connectivity The module communicates with a host processor (like an ARM Cortex-M or Raspberry Pi) through specific electronic pinouts: #### A. Data Interface (40-pin or 50-pin FPC) * **RGB Data Pins:** R0-R7, G0-G7, B0-B7 for color representation. * **Control Signals:** HSYNC (Horizontal Sync), VSYNC (Vertical Sync), DE (Data Enable), and PCLK (Pixel Clock). #### B. Backlight Driver Circuit * **Voltage:** Requires a constant current driver (typically 9.0V to 10.5V depending on the internal LED string configuration). * **PWM Dimming:** Supports Pulse Width Modulation on the "LED-K" or "ADJ" pin to control screen brightness. #### C. Power Requirements * **VCC (Logic):** 3.3V (Standard for CMOS logic). * **AVDD (Analog):** ~10V for the internal source driver. * **VGH/VGL:** Gate voltages for the TFT transistors (High ~15V, Low ~-7V). --- ### 4. Component Summary Table | Component | Function | | :--- | :--- | | **TFT Glass** | The liquid crystal layer that generates the image. | | **Driver IC** | Source and Gate drivers mounted on the glass (COG - Chip on Glass). | | **LED Array** | Provides the light source from the bottom or edge. | | **FPC Cable** | Flexible connection carrying signals and power to the main PCB. | | **ITO Film** | Indium Tin Oxide coating used for both the display electrodes and the resistive touch sensor. | ---