LSC024I20-M-V1 (ST7789T3-G4-1): 2.4-inch TFT LCD Module, 240×320, MCU 8080 Interface, 262k Colors, TN Trans-reflective
Product Subtitle / Keywords
2.4 Inch Display, 240(RGB)×320 Resolution, Trans-reflective a-Si TFT-LCD Module, TN Display Mode, COG+FPC+B/L+CTP Module Type, MCU 8080-8bit/16bit Parallel Interface, 262K Colors, Main LCD Driver: ST7789T3-G4-1, Module Outline: 40.22 × 57 × 2.36 mm (Without TP), 45.6 × 70.51 × 4.21 mm (With TP/ CG), Active Area: 36.72 × 48.96 mm, Operating Temp: -20°C ~ +70°C, Storage Temp: -30°C ~ +80°C, Backlight: LED, Vf=11.2~13.2V, If=20mA (Total), View Direction: 12:00, with Capacitive Touch Panel (I2C Interface), RoHS Compliant, Product Life: 13 Months
1. Executive Summary And Product Positioning
The LSC024I20-M-V1 is a 2.4-inch diagonal trans-reflective type color active matrix TFT (Thin Film Transistor) LCD (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 module, a driver circuit, a backlight unit, and a capacitive touch panel (CTP) into a compact and robust package. The product specification (Revision A0) serves as the definitive technical document for this module.
This module is characterized by its trans-reflective technology and integrated touch functionality in a 2.4-inch form factor. Unlike purely transmissive displays, a trans-reflective LCD combines a backlight with a reflective layer, allowing it to be readable in both bright sunlight (using ambient light reflection) and dark environments (using its backlight). It features a resolution of 240(RGB)×320 pixels and is capable of displaying up to 262k colors, which corresponds to 6-bit color depth 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 LSC024I20-M-V1 is engineered for devices that demand a clear, sunlight-readable display with touch input capability, such as handheld instruments, outdoor equipment, and industrial control panels. Its architecture is built around several key technologies and design choices:
- Core Technology: Trans-reflective type a-Si TFT-LCD with TN (Twisted Nematic) display mode. The key differentiator is the trans-reflective nature of the LCD, which makes it usable in bright outdoor conditions by reflecting ambient light, while also providing a backlight for indoor or dark use. The TN mode offers fast response times. The best image viewing direction is at 12:00 o'clock.
- Module Type: COG+FPC+B/L+CTP. The driver IC (ST7789T3-G4-1) is directly mounted onto the LCD glass (COG), minimizing size. The FPC provides a flexible connection. The B/L is essential for dark environments. The CTP, using an I2C interface, provides native touch input capability. The module outline is 40.22(H) ×57(V)×2.36(T) mm (excluding TP), or 45.6(H) ×70.51(V)×4.21(T) mm (with TP/CG).
- Display Format: Graphic 240(RGB)×320 Dot-matrix. This is QVGA portrait resolution, ideal for applications requiring a vertical display area.
- Display Characteristics: Capable of displaying up to 262k colors.
- Interface Type: The module utilizes an MCU 8080 parallel interface, supporting both 8-bit and 16-bit modes. This is selected via the IM0 pin. This parallel interface is common for MCUs and offers high-speed data transfer.
- Main LCD Driver IC: The module integrates the ST7789T3-G4-1 driver IC. This specific IC is designed to drive the TFT matrix and handle the MCU 8080 interface commands.
- Backlight Unit: The module utilizes an LED backlight. The recommended circuit requires a constant current driver. The specified driving condition is VF=11.2~13.2V and IF=20mA (total current for all LEDs). It is recommended to drive each LED between 3mA and 20mA.
- Touch Panel: The integrated capacitive touch panel uses a dedicated I2C interface (6 pins: GND, TP_VCC, TP_SCL, TP_SDA, TP_INT, TP_RST). The touch panel power supply (TP_VCC) is 2.8V to 3.6V.
- Special Features: Trans-reflective technology for sunlight readability, TN mode, MCU 8080 parallel interface, integrated capacitive touch panel (CTP), RoHS compliant.
- Approval Status: Approved Product Specification only (Revision A0, Initial Released).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specification
This section provides the physical dimensions and other key general parameters of the module.
| Parameter | Specification | Unit |
|---|---|---|
| Panel Size | 2.4'' (Diagonal) | Inch |
| Module Outline (H×V×T) - No TP | 40.22 × 57 × 2.36 | mm |
| TP/CG Outline (H×V×T) | 45.6 × 70.51 × 4.21 | mm |
| Active Area (H×V) | 36.72 × 48.96 | mm |
| Number of Dots | 240(RGB) × 320 | pixels |
| LCD Type | a-Si TFT, TN / Trans-reflective | - |
| Display Colors | 262K | colors |
| Module Type | COG+FPC+B/L+CTP | - |
| Main LCD Driver IC | ST7789T3-G4-1 | - |
| Display Mode | TN, Trans-reflective | - |
| View Direction (Best Image) | 12:00 o'clock | - |
| Interface | MCU8080-8bit / MCU8080-16bit | - |
| Touch Panel | Capacitive, I2C Interface | - |
| Weight | TBD | g |
| Life Time | 13 | Months |
Note 1: Module Outline excludes hooks, posts, FPC/FPC tail etc.
3.2 Absolute Maximum Ratings (VSS=0V, Ta=25°C)
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 |
|---|---|---|---|---|
| Operating temperature | TOPR | -20 | 70 | °C |
| Storage temperature | TSTR | -30 | 80 | °C |
3.3 DC Characteristics
These are the recommended operating conditions for the module. It has separate power supplies for the Display IC and the Touch IC.
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Analog Supply Voltage (Display IC) | VCC | 2.5 | 2.8 | 3.3 | V |
| Logic Supply Voltage (Display IC) | IOVCC | 1.65 | 2.8 | 3.3 | V |
| Touch IC Supply Voltage | TP VCC | 2.8 | 3.0 | 3.6 | V |
| Input Low voltage | VIL | VSS | - | 0.3*IOVCC | V |
| Input High voltage | VIH | 0.7*IOVCC | - | IOVCC | V |
| Current Consumption (Display, Normal) | Ivdd | - | 7.5 | - | mA |
| Current Consumption (Display, Standby) | Ivdd | - | 30 | - | uA |
| Current Consumption (Touch, Dynamic) | Ivdd | - | 10 | - | mA |
| Current Consumption (Touch, Standby) | Ivdd | - | 20 | - | uA |
| Frame Frequency | fFR | - | 60 | - | Hz |
3.4 Backlight Driving Conditions
The module uses an LED backlight driven by a constant current circuit. The backlight consists of 4 LEDs connected in a configuration that requires VF=11.2~13.2V.
| Parameter | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Forward Voltage | VF | 11.2 | - | 13.2 | V | Measured at IF=20mA |
| Forward Current (Total) | IF | 3 | 20 | 20 | mA | Recommend 3-20mA each LED |
Note: A constant current circuit is required for the backlight driver.
3.5 Optical Specifications (Transmissive Mode)
The electro-optical characteristics define the visual performance of the module. These values are measured under specific laboratory conditions (Ta=25°C, VDD=2.8V). The module offers a luminance of 100 cd/m² (Typ.) and a contrast ratio of 45:1 (Typ.) in transmissive mode.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Luminance on surface | Lv | θx=θy=0°, If=20mA | - | 100 | - | cd/m² |
| Contrast Ratio | CR | θx=θy=0° | - | 45:1 | - | - |
| Response time (Tr+Tf) | Tr+Tf | θx=θy=0° | - | - | 30 | ms |
| Color Gamut (NTSC) | - | Transmissive | - | 14 | - | % |
3.6 Interface Connection (38-Pin FPC)
The module uses a 38-pin FPC connector. It integrates the LCD MCU 8080 parallel interface and the CTP I2C interface. The pinout includes power (VCC, IOVCC, GND), control signals (CS, DC, WR, RD, RESET, IM0), 16-bit data bus (DB0-DB15), backlight power (LEDA, LEDK), and touch interface signals (TP-VCC, TP-GND, TP-SCL, TP-SDA, TP-INT). The IM0 pin selects the interface width: 0 for 8-bit, 1 for 16-bit.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LCM_ID | - | NC |
| 2 | GND | P | Power Ground |
| 3 | IOVCC | P | Power Supply for I/O System |
| 4 | VCC | P | Power Supply for Analog, Digital System and Booster Circuit |
| 5 | FMARK | O | Tearing effect signal. If not used, leave open. |
| 6 | CS | I | Chip selection pin. Low enable |
| 7 | DC | I | Display data/command selection pin in parallel interface |
| 8 | WR | I | Write enable in MCU parallel interface |
| 9 | RD | I | Read enable in 8080 MCU parallel interface |
| 10-25 | DB0~DB15 | I/O | 16-bit data bus. DB[15:0] are used for 16-bit I/F. |
| 26 | RESET | I | Reset signal, active low |
| 27 | GND | P | Power Ground |
| 28-29 | LEDA | P | LED Aathode |
| 30-31 | LEDK | P | LED Cathode |
| 32 | TP-GND | P | Ground for Touch Panel |
| 33 | TP-VCC | P | Power Supply for TP, IOVCC=2.4V~3.3V |
| 34 | IM0 | I | MCU interface mode select. 0: 80-8bit, 1: 80-16bit |
| 35 | GND | P | Power Ground |
| 36 | TP-SCL | I | I²C clock signal of Touch Panel |
| 37 | TP-SDA | I/O | I²C data signal of Touch Panel |
| 38 | TP-INT | O | Interrupt signal to main processor of Touch Panel |
4. Application Scenario
The LSC024I20-M-V1 is a versatile and robust display module with an integrated touch panel, making it an ideal choice for any embedded system that requires a clear, sunlight-readable visual output and user input capability. Its 2.4-inch diagonal size with a 240×320 resolution provides a crisp and detailed image for rich graphical content and text. The 262K 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:
- Outdoor Handheld Instruments: GPS devices, field diagnostic tools, and environmental monitoring equipment benefit from the trans-reflective display which remains readable in direct sunlight.
- Industrial Control Panels: HMIs for machinery, process controllers, and automation equipment benefit from the clear display, wide temperature range (-20°C to +70°C), and integrated touch.
- Medical Instruments: Portable diagnostic devices, patient monitors, and drug infusion pumps can utilize the module for clear data presentation in various lighting conditions.
- Smart Home Devices: Thermostats, smart switches, and security system keypads can use this display for a modern, intuitive touch interface, especially in areas with bright ambient light.
- Automotive Aftermarket: Car dashboard displays or rear-seat entertainment systems where sunlight readability is critical.
The module's trans-reflective technology is the key differentiator. Designers must ensure their application's operating environment stays within the -20°C to 70°C range. The module life is specified as 13 months.
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 TP FPC (TP-SCL, TP-SDA, etc.) is also delicate.
Safety Precautions: The liquid crystal in the LCD is poisonous. Do not put it in your mouth. If the liquid crystal touches your skin or clothes, wash it off immediately using soap and water. Since the liquid crystal cells are made of glass, do not apply strong impact on them.
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. The warranty liability of the manufacturer is limited to repair and/or replacement. It is suggested to use all modules within six months of delivery. If the module storage time exceeds twelve months, it is recommended to recheck the module before use.
It is strongly recommended to read the full specification document (LSC024I20-M-V1 Product Specification Rev A0) 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. As a standard product, the manufacturer retains the right to change material or process for improving product properties without prior notice.
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.
