LSL0154I07-S-V2 1.54 Inch TFT-LCD Module 240x240 262K Colors
1. Executive Summary & Product Positioning
The LSL0154I07-S-V2 is a 1.54-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module developed by 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd). The panel size is 1.54 inch and the resolution is 240(RGB)*240, the panel can display up to 262k colors. This module is a COG (Chip-on-Glass) + FPC + B/L (Backlight) + LENS construction, featuring an integrated cover lens. The product specification was first released on 2026-05-20 and later revised to V2 on 2026-06-04.
Product Positioning: This 1.54-inch module is well-suited for a wide range of applications requiring a compact, high-quality display with a wide viewing angle, simple SPI interface, and integrated cover glass. It is ideal for wearable devices, portable instruments, smart home controllers, and other compact embedded display systems.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 1.54-inch diagonal, a-Si TFT active matrix, transmissive, IPS (In-Plane Switching). Resolution is 240(RGB) × 240 pixels with a square aspect ratio.
- Driver Circuit: The module integrates the ST7789P3 driver IC, communicating via a 4-Wire SPI (Serial Peripheral Interface).
- Backlight Unit (B/L): A white LED backlight with 3 Chip-White LEDs configured in parallel. The typical driving condition is IF=60mA, Vf=3.1V (TYP). The total brightness with cover lens is 350 cd/m².
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L + LENS. The LCM module size is 41.6 × 71.3 × 3.03 mm (H×V×D). The lens material is 1.1mm thick Asahi Glass with a Mohs hardness of 6H or above.
- Interface: The module communicates via a 12-pin FPC connector. The display interface is 4-Wire SPI (Serial Peripheral Interface).
- Display Mode: Transmissive, IPS.
- Viewing Direction: Full viewing angle (IPS, 80° all directions).
- RoHS: All materials are compliant with RoHS standards.
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 1.54 inches |
| Resolution (Dots) | 240(RGB) × 240 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, IPS |
| Module Construction | COG+FPC+B/L+LENS |
| Color Depth | 262K Colors |
| Input Data Interface | 4-Wire SPI (Serial) |
| Driver IC | ST7789P3 |
| Module Size (H×V×D) | 41.6 × 71.3 × 3.03 mm |
| Active Area (H×V) | 27.72 × 27.72 mm |
| Display Mode | Transmissive, IPS |
| Viewing Direction | IPS (80° All Directions) |
| Backlight Type | 3 Chip-White LEDs, Parallel |
| Total Luminance (with Cover Lens) | 350 cd/m² |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Environmental Compliance | RoHS |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage to the device.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1, Note2 |
| Supply voltage | IOVCC | -0.3 | 4.6 | V | Note1, Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1, Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1, Note2 |
3.3 Electrical Characteristics
3.3.1 Recommended DC Characteristics
Condition: VDDI=1.65 to 3.3V, VDD=2.4 to 3.3V, AGND=DGND=0V, Ta=25℃.
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.4 | 2.8 | 3.3 | V | Note1 |
| Supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V | Note1 |
| Input Voltage (L level) | VIL | 0 | --- | 0.3*IOVCC | V | Note1 |
| Input Voltage (H level) | VIH | 0.7*IOVCC | --- | IOVCC | V | Note1 |
3.3.2 Backlight LED Characteristics
The backlight consists of 3 Chip-White LEDs in parallel. The typical driving condition is IF=60mA, Vf=3.1V (TYP).
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage (Total) | Vf | 3.1 | V |
| Forward Current (Total) | IF | 60 | mA |
3.4 Interface Pin Assignment (12-Pin FPC)
The module communicates via a 12-pin FPC connector. The interface is a 4-Wire Serial SPI.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDA | P | Power for LED backlight anode |
| 2 | LEDK | P | Power for LED backlight cathode |
| 3 | GND | P | Ground |
| 4 | TE | O | Tearing effect signal is used to synchronize MCU to frame memory |
| 5 | DC | I | Display data/command selection pin in 4-line serial interface. |
| 6 | SDA | I | SPI interface input pin. |
| 7 | SCK | I | Serial clock pin |
| 8 | RST | I | This signal will reset the device and it must be applied to properly initialize the chip. |
| 9 | CS | I | Chip selection pin |
| 10 | IOVCC | P | power supply |
| 11 | GND | P | Ground |
| 12 | VDD | P | power supply |
3.5 Electro-Optical Characteristics
Measuring Condition: Ta=25°C, dark room.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time | Tr +Tf | θx = θy =0 | --- | 30 | 35 | ms | Note 1 |
| Contrast Ratio | CR | θx = θy =0 | 700 | 900 | --- | - | Note 2 |
| Transmittance | T% | θx = θy =0 | 4.6 | 5.4 | --- | % | - |
| Color Chromaticity (Red) | R x | θx = θy =0 | --- | 0.631 | --- | - | - |
| Color Chromaticity (Red) | R y | θx = θy =0 | --- | 0.330 | --- | - | - |
| Viewing angle (IPS) | θT, θB, θL, θR | CR > 10 | --- | 80 | --- | Deg. | Note 3 |
3.6 Design Notes from Documentation
- Cover Lens (Glass) Specifications:
- Material: Asahi Glass, 1.1mm thickness.
- Hardness: Mohs hardness of 6H or above.
- Impact Test: 64g steel ball drop test from 60cm height without corner fall, no breakage of lens and inner screen.
- RoHS: Compliant.
- Mechanical Design Recommendations:
- Suggested housing visible area (shell opening) should be 0.3mm smaller than the VAmds (Viewing Area) on each side.
- Suggested housing foam opening should be 0.6mm larger than the VAmds on each side.
- The edge of the Touch Panel (TP) must not contact any metal conductor.
- General tolerance for segments to edge of glass: ±0.2mm.
- B/L Driver: The backlight consists of 3 Chip-White LEDs in parallel (60mA total, 3.1V typical). A constant current driver for the backlight is required.
- Interface: The module uses a 4-wire SPI interface. The pinout includes Serial Clock (SCK), Serial Data (SDA), Data/Command select (DC), Chip Select (CS), Reset (RST), and Tearing Effect (TE).
- IPS Display: This module features IPS (In-Plane Switching) technology providing 80-degree wide viewing angles in all four directions.
- RoHS: All materials are ROHS compliant.
- Revision Change: The V2 version (2026-06-04) feature a 2mm shorter FPC gold finger area compared to the V1 version.
4. Application Guidelines & Critical Notes
- Power Supply: The module requires VDD (2.8V typical) and IOVCC (1.8V typical) power supplies. Ensure the power supplies are stable and have low ripple. The absolute maximum rating for both is 4.6V.
- Interface: This module uses a standard 4-wire SPI protocol. The host processor must be configured for this protocol. The Data/Command (DC) pin is used to select between command and data modes.
- Backlight Driver (External): A constant current driver is required to supply the backlight via the LEDA (Pin 1) and LEDK (Pin 2) pins. The required driving condition is 60mA total current at 3.1V typical forward voltage.
- Reset: Ensure the RST pin (Pin 8) is driven low for a sufficient pulse width to initiate a proper reset before initializing the display.
- Mechanical Mounting: Follow the mechanical design notes for the enclosure and foam opening to ensure proper fit and avoid damage to the glass and FPC. The FPC is shipped in a bent configuration.
- Cover Lens Care: The cover lens is made of glass and is susceptible to breakage upon impact. Ensure the 64g/60cm steel ball drop test criteria are considered for the end product's mechanical design.
- ESD Protection: Silver paste (银浆点) is used for grounding. A yellow insulating tape (黄色绝缘胶纸) is placed on the back for insulation. TP edge must not contact any metal conductor.
- Operating Temperature: The module operates from -20°C to +70°C. Satisfactory display performance is only guaranteed within this range.
- Storage: Store the module in a clean environment, free from dust, moisture, and direct sunlight. Storage temperature range is -30°C to +80°C.
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD).
5. Conclusion & Design-In Support
The LSL0154I07-S-V2 from Lesson Smart Display Technology is a 1.54-inch IPS TFT-LCD module with an integrated cover lens and a 4-wire SPI interface. It features a high contrast ratio (900:1 typical), a wide IPS viewing angle (80° all directions), a fast 30ms response time, and a robust mechanical design including a hardened glass lens. It is a reliable, high-quality display solution suitable for a wide variety of compact and durable embedded display applications.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the full mechanical drawing and the driver IC (ST7789P3) datasheet for detailed initialization and timing parameters.
- Design a clean 2.8V power supply for the LCD. Design a backlight constant current driver circuit capable of delivering 60mA at up to 3.3V.
- Configure the host processor's SPI interface to match the timing specifications detailed in this datasheet.
- Follow the mechanical design guidelines for the enclosure and foam opening to ensure proper fit and avoid damage to the cover glass.
- Contact the manufacturer for evaluation modules, sample requests, and further technical support during the design-in phase.
This module is designed to provide a reliable and vibrant display solution for a wide array of applications.
