LSC043I08-R-V1 (ST7701SN): 4.3-inch TFT LCD Module, 480×800, RGB/MCU/SPI Interface, 16.7M Colors, Transmissive IPS
Product Subtitle / Keywords
4.3 Inch Display, 480(RGB)×800 Resolution, Transmissive a-Si TFT-LCD Module (Normally Black), COG+FPC+B/L+CTP Module Type, RGB/SPI/MCU 8-bit/9-bit/16-bit/18-bit Interface, 16.7M Colors (24-bit), Main LCD Driver: ST7701SN, IPS Display Mode (ALL View), Module Size: 63.96 × 105.73 × 3.42 mm (Approx.), Active Area: 56.16 × 93.6 mm, Operating Temp: -20°C ~ +70°C, Storage Temp: -30°C ~ +80°C, Backlight: 8 Chip-White LED (Series), Vf=24V (Typ.), If=20mA, Module Luminance: 350 cd/m², Contrast Ratio: 1000:1 (Typ.), Response Time: 25ms (Typ.), Viewing Angle: IPS (ALL, 80° Typ.), with Capacitive Touch Panel (CTP, 50-Pin FPC, 6-Pin I2C), RoHS Compliant, GB/T 2828-2003 Inspection, Product Revision 1.0
1. Executive Summary And Product Positioning
The LSC043I08-R-V1 is a 4.3-inch diagonal transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, manufactured by Lesson (Wanan) Smart Display Technology Co., Ltd. This comprehensive module is a complete, ready-to-use visual and touch interface solution, integrating a TFT-LCD panel, a driver circuit, a backlight unit (B/L), and a capacitive touch panel (CTP) into a compact and robust package. The product specification (Revision 1.0) serves as the definitive technical document for this module.
This module is characterized by its high-resolution display and integrated touch functionality in a widely-used 4.3-inch form factor. It features a resolution of 480(RGB)×800 pixels and is capable of displaying up to 16.7M colors, which corresponds to 24-bit color depth (8-bit per primary color Red, Green, Blue). This ensures smooth color gradients and detailed imagery suitable for advanced graphical user interfaces. The inclusion of a CTP eliminates the need for a separate touch sensor, simplifying system integration and mechanical design.
The unequivocal recommendation for engineers is to strictly adhere to the absolute maximum ratings, electrical specifications, and interface timing described herein to ensure reliable performance and compatibility within the intended application. Failure to operate within these limits can lead to permanent damage, degraded optical performance, or reduced product lifespan.
2. Detailed Product Overview And Architecture
The LSC043I08-R-V1 is engineered for devices that demand a clear, vibrant display with touch input capability, such as handheld instruments, smart home hubs, and industrial control panels. Its architecture is built around several key technologies and design choices:
- Core Technology: Transmissive type a-Si TFT-LCD with IPS (In-Plane Switching) display mode. This technology offers superior color reproduction and wide viewing angles, specified as Free Direction or "ALL O'CLOCK". The display mode is Normally Black, meaning pixels appear black when no voltage is applied. As a transmissive display, it requires a backlight to be visible.
- Module Type: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight) + CTP (Capacitive Touch Panel). The driver IC (ST7701SN) is directly mounted onto the LCD glass (COG), minimizing size and interconnect complexity. The FPC provides a flexible connection to the host system. The CTP provides native touch input capability, using a separate I2C interface (6-pin connector).
- Display Format: Graphic 480(RGB)×800 Dot-matrix. This is a WVGA portrait resolution, ideal for applications requiring a vertical display area with fine detail. The module size is 63.96 × 105.73 × 3.42 mm, with an active area of 56.16 × 93.6 mm.
- Display Characteristics: Capable of displaying up to 16.7M colors. This refers to 8-bit color depth per primary color (R, G, B), allowing the module to generate 16,777,216 distinct colors. The module has a high contrast ratio of 1000:1 (Typ.) and a luminance of 350 cd/m² (Typ.). The response time (Tr+Tf) is 25ms (Typ.), 35ms (Max.).
- Interface Type: The module utilizes a versatile interface that supports RGB (24-bit parallel), MCU 8-bit/9-bit/16-bit/18-bit, and SPI (3-line/4-line) modes. The pinout shows signals for DCLK, HSYNC, VSYNC, DE, and 24-bit data lines (R0-R7, G0-G7, B0-B7) for RGB mode, as well as command/data control signals (RS/DC), chip select (CS), serial clock (SCL), serial data (SDI), and serial data output (SDO). The module implements a CABC (Content Adaptive Brightness Control) function via pin 6 (CABC), which accepts a PWM signal for backlight brightness adjustment. The interface also includes a chip select (CS) and a data/command select (RS/DC).
- Main LCD Driver IC: The module integrates the ST7701SN driver IC. This specific IC is designed to drive the TFT matrix, handle multiple interface types (RGB, MCU, SPI), and provide programmable features like CABC.
- Backlight Unit: The module utilizes a white LED backlight comprised of 8 chips connected in series (串联). The specified driving condition is IF=20mA and Vf (Typ.)=24V. The module luminance is 350 cd/m².
- Special Features: High resolution 16.7M color capability (8-bit), IPS technology for wide viewing angles (ALL O'CLOCK, 80° Typ.), 350 cd/m² brightness, 1000:1 contrast ratio, integrated capacitive touch panel (CTP), multiple selectable interface modes (RGB, MCU, SPI), CABC (Content Adaptive Brightness Control), compact size (4.3 inch), support for both serial and parallel interfaces, and compliant with the RoHS directive. The specification includes a detailed FPC bending diagram (FPC弯折出货) and design recommendations.
- Approval Status: Approved Product Specification only (Revision 1.0).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specification
This section provides the physical dimensions and other key general parameters of the module. The module includes a capacitive touch panel (CTP) and an FPC that can be bent for shipping.
| Parameter | Specification | Unit |
|---|---|---|
| Panel Size | 4.3'' (Diagonal) | Inch |
| Module Size (H×V×D) | 63.96 × 105.73 × 3.42 | mm |
| Active Area (H×V) | 56.16 × 93.6 | mm |
| Number of Dots | 480(RGB) × 800 | pixels |
| Display Type | Active matrix a-Si TFT, Transmissive, Normally Black, IPS | - |
| Display Colors | 16.7M (24-bit) | colors |
| Module Type | COG+FPC+B/L+CTP | - |
| Main LCD Driver IC | ST7701SN | - |
| Display Mode | IPS (All View Direction, 12:00 O'clock) | - |
| Luminance (Typ.) | 350 | cd/m² |
| Contrast Ratio (Typ.) | 1000:1 | - |
| Response Time (Tr+Tf) | 25 (Typ.), 35 (Max.) | ms |
| Viewing Angle (CR>10, Typ.) | 80° (All Directions) | Deg. |
| Interface | RGB / MCU 8/9/16/18-bit / 4-Line SPI | - |
| Touch Panel Type | Capacitive (GFF, I2C Interface, 6-Pin) | - |
| Touch Panel Structure | GFF, Surface Hardness >6H | - |
| FPC Tail Length | 29.0 mm (From LCD edge) | mm |
| FPC Tail Thickness (Connector) | 0.3 ± 0.03 mm (With PI Reinforcement) | mm |
3.2 Absolute Maximum Ratings
The absolute maximum ratings are stress limits. Operating the module at or beyond these values can result in irreversible damage.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage (Main) | VCC | -0.3 | 3.6 | V | Note1, Note2 |
| Supply voltage (I/O) | IOVCC | -0.3 | 3.6 | V | Note1, Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1, Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1, Note2 |
Note1: Exceeding these values may cause permanent damage.
Note2: All voltages are referenced to GND.
3.3 DC Characteristics
These are the recommended operating conditions for the module.
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 2.5 | 2.8 | 3.6 | V |
| Supply voltage (I/O) | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input Voltage (L level) | VIL | VSS | - | 0.3*IOVCC | V |
| Input Voltage (H level) | VIH | 0.7*IOVCC | - | IOVCC | V |
| LCD Drive Power Current | ILCD | - | TBD | - | mA |
3.4 Backlight Driving Conditions
The module uses a white LED backlight composed of 8 chips connected in series (串联). A constant current source is strongly recommended for driving the backlight to ensure consistent brightness and longevity.
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage | VF | 24.0 | V |
| Forward Current (Total per LED Chip) | If | 20 | mA |
3.5 Interface Connection (50-Pin FPC + 6-Pin CTP)
The module uses a 50-pin FPC connector for the LCD interface and a separate 6-pin FPC connector for the CTP. The LCD interface is versatile, supporting RGB, MCU, and SPI modes.
3.5.1 LCD Interface (50-Pin Connector)
The module's 50-pin connector provides signals for power (VCC, IOVCC, GND), parallel RGB data (R0-R7, G0-G7, B0-B7), synchronization (VSYNC, HSYNC, DE, DCLK), control (RESET, RS/DC, CS, CABC, SDO, SDI, SCL), and backlight power (LED+, LED-). The module supports multiple interface modes (RGB, MCU 8/9/16/18-bit, and SPI 3/4-line). The display can be disabled by setting the DISP pin low (on some modules) or by the chip select (CS) pin. The module also incorporates a CABC function (Content Adaptive Brightness Control) via pin 6 (CABC).
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1, 4, 7, 11, 13 | GND | P | Ground |
| 2 | LED- | P | Power for LED backlight cathode |
| 3 | LED+ | P | Power for LED backlight anode |
| 5 | LCD_ID | - | LCD ID |
| 6 | CABC | I | PWM frequency output for LCD driver control (CABC) |
| 8 | SDO | O | Serial data output pin for the SPI interface |
| 9 | SDI | I | SDA: Serial data input pin for SPI interface |
| 10 | SCL | I | SCL: Serial clock input for SPI interface |
| 12 | CS | I | Chip select signal. Low: chip is selected and accessible. High: not selected. |
| 14-21, 22-29, 30-37 | R0-R7, G0-G7, B0-B7 | I | Parallel data bus for RGB interface |
3.5.2 CTP Interface (6-Pin Connector, I2C)
The module includes a dedicated 6-pin FPC connector for the capacitive touch panel. The connector uses a 0.5mm pitch FH26 series connector.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | VCC | P | Power Supply |
| 3 | SDA | I/O | I2C SDA pin for TP |
| 4 | SCL | I | I2C SCL pin for TP |
| 5 | INT | O | Interrupt signal for TP |
| 6 | RST | I | Reset Pin for TP |
3.6 Timing Characteristics (RGB Interface)
The module supports standard RGB interface timing. The specification details timing for VSYNC, HSYNC, ENABLE, DOTCLK, and data bus signals. The typical timing parameters are: DOTCLK Cycle Time (TCYCD) = 33ns (Max.), DOTCLK High-level Pulse Width (PWDH) = 15ns (Min.), DOTCLK Low-level Pulse Width (PWDL) = 15ns (Min.), VSYNC/HSYNC Setup Time (TSYNCS) = 5ns (Max.), Data Setup Time (TPDS) = 5ns (Max.), Data Hold Time (TPDH) = 5ns (Max.). Reset timing requires a reset pulse duration (TRW) of 10µs (Min.) and a reset cancel time (TRT) of 5ms (Min., up to 120ms depending on settings).
| Signal | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| HSYNC, VSYNC | TSYNCS | 5 | - | ns |
| ENABLE | TENS | 5 | - | ns |
| DOTCLK | PWDH | 15 | - | ns |
| DOTCLK | TCYCD | 33 | - | ns |
| DB (Data Bus) | TPDS | 5 | - | ns |
3.7 Optical Specifications
The electro-optical characteristics of the module are measured under standard laboratory conditions (Ta=25°C). Key parameters include a luminance of 350 cd/m², a contrast ratio of 1000:1 (Typ.), and response time of 25ms (Typ.). The viewing angle is 80° (Typ.) in all directions for CR>10.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time | Tr + Tf | θx=θy=0° | - | 25 | 35 | ms | Note 1 |
| Contrast Ratio | CR | θx=θy=0° | 700 | 1000 | - | - | Note 2 |
| Transmittance | T% | θx=θy=0° | - | 6.0 | - | % | - |
| White Chromaticity (CIE1931) | Wx | θx=θy=0° | - | 0.304 | - | - | - |
| White Chromaticity (CIE1931) | Wy | θx=θy=0° | - | 0.345 | - | - | Note 3 |
| Viewing angle (CR>10) | θT, θB, θL, θR | CR>10 | 70 | 80 | - | Deg. | Note 3 |
| Luminance (If=20mA) | L | - | - | 350 | - | cd/m² | Note 4 |
3.8 Inspection Standards (GB/T 2828-2003)
The module is subject to inspection according to GB/T 2828-2003, normal inspection, Class II. The specification defines AQL (Acceptable Quality Level) for major and minor defects. Detailed inspection criteria include glass defects (cracks, dimensions, chipping), LCD appearance defects (scratches, bubbles, dots, eyewinkers), FPC defects (peeling, no tape, dirty dots), black tape & mara tape defects, and silicon & tuffy glue defects.
| Item | Specification | Standard |
|---|---|---|
| AQL | Major and Minor Defect | GB/T 2828-2003, Normal Inspection, Class II |
| Inspection Conditions | 30cm distance, 30° incidence, 45° angle | 30W Light Source |
4. Application Scenario
The LSC043I08-R-V1 is a versatile and high-performance display module with an integrated capacitive touch panel, making it an ideal choice for any embedded system that requires a vibrant visual output and user input capability. Its 4.3-inch diagonal size with a 480×800 resolution provides a crisp and detailed image for rich graphical content and text. The 16.7M color capability allows for a visually appealing user interface. The integrated CTP eliminates the need for a separate touch controller, simplifying the bill of materials and system integration.
Key application areas are numerous and diverse:
- Industrial Human-Machine Interfaces (HMIs): Control panels for machinery, factory automation, and process control. The IPS viewing angle ensures readability from any direction.
- Handheld Instruments: Multimeters, signal generators, oscilloscopes, and other portable test equipment.
- Smart Home Devices: Thermostats, smart switches, security system keypads, and intercom systems.
- Medical Devices: Patient monitors, diagnostic equipment, and infusion pumps where clear, wide-angle viewing is critical.
- IoT Edge Terminals: Data loggers and local display nodes for smart agriculture, building management, and environmental monitoring.
The module's versatile interface (RGB, MCU, SPI) provides maximum flexibility for integration with various host processors. The IPS technology ensures excellent image consistency from any angle. The mechanical drawing provides detailed specifications for integration, including specific recommendations for the case foam opening and visual area. The FPC can be bent for shipping (弯折出货).
5. Handling Precautions And Compliance
The LCD panel is made of glass and is fragile. The polarizer surface is easily scratched. The module should be handled with care to avoid applying pressure on the display area, especially the back of the LCD. ESD (Electrostatic Discharge) protection is mandatory throughout handling, assembly, and testing. Use grounded wrist straps, conductive work surfaces, and anti-static packaging. The FPC is also delicate; avoid sharp bends at the connector interface. The FPC bending diagram should be closely followed for shipping and assembly.
Important: The module includes a capacitive touch panel (GFF structure with surface hardness >6H). The touch panel should not contact any metal conductors to prevent false touches or electrical shorts. The customer's case foam opening should be smaller than or equal to the dimensions shown in the drawing to avoid light leakage.
The module should be stored in a clean, dry environment away from direct sunlight, high temperatures, and corrosive gases. The recommended storage temperature is -30°C to 80°C. It is strongly recommended to read the full specification document (LSC043I08-R-V1 Product Specification Revision 1.0) before integration and to test the module under application-specific conditions. The manufacturer disclaims liability for damages resulting from improper use, modification, or failure to follow these guidelines.
The product is compliant with the RoHS (Restriction of Hazardous Substances) directive. Proper waste disposal according to local regulations is recommended at the end of the product's lifecycle.
