LS050I19-MP-V1 | 4.95 inch TFT-LCD | 480x854 | MIPI | IPS | COG+FPC+B/L+LENS
1. Executive Summary & Product Positioning
The LS050I19-MP-V1 is a 4.95-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). It is composed of a TFT-LCD panel, a driver circuit and a backlight unit. The panel size is 4.95 inch and the resolution is 480(RGB)*854, the panel can display up to 16.7M colors.
Product Positioning: Designed for a wide range of portable, industrial, and smart device display applications requiring a high-resolution WVGA-like display with a standard MIPI interface. With its 4.95-inch diagonal, high 480x854 resolution, wide viewing angle (IPS) and integrated LENS for a premium look, it is ideally suited for smart home controls, portable instruments, and other embedded human-machine interfaces.
2. Detailed Product Overview & Architecture
The module's architecture is designed for high performance and robust integration. The primary components include:
- TFT-LCD Panel: 4.95-inch diagonal, a-Si TFT active matrix, transmissive, IPS display mode. The resolution is 480(RGB) × 854 pixels with an active area of 61.63 × 109.65 mm.
- Driver IC: The module uses the ST7701SN driver IC, which supports a MIPI interface.
- Backlight Unit (B/L): A white LED edge-lit backlight unit. The driving condition is IF=40mA, Vf=18V(TYP).
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L + LENS (Cover Lens). The module outline dimensions are 70.35 (H) × 120.05 (V) × 3.78 (D) mm.
- Interface: The module communicates via a 40-pin connector. The main display interface is MIPI (Mobile Industry Processor Interface).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 4.95 inches |
| Resolution (Dots) | 480(RGB) × 854 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si |
| Module Construction | COG+FPC+B/L+LENS |
| Color Depth | 16.7M Colors |
| Viewing Direction (Grayscale Inversion) | Free (IPS) |
| Input Data Interface | MIPI |
| Driver IC | ST7701SN |
| Active Area (H×V) | 61.63 × 109.65 mm |
| Module Size (H×V×D) | 70.35 × 120.05 × 3.78 mm |
| Operating Temperature | -10°C to +60°C |
| Storage Temperature | -20°C to +70°C |
3.2 Electrical Specifications
3.2.1 Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply voltage (VCC) | VCC | -0.3 | 3.6 | V |
| Supply voltage (IOVCC) | IOVCC | -0.3 | 3.6 | V |
| Operating Temperature | TOPR | -20 | 70 | °C |
| Storage Temperature | TSTR | -30 | 80 | °C |
3.2.2 DC Characteristics (Ta=25°C)
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | VCC | 2.5 | 2.8 | 3.6 | V |
| Supply Voltage (IOVCC) | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input Voltage (Low Level) | VIL | VSS | -- | 0.3*IOVCC | V |
| Input Voltage (High Level) | VIH | 0.7*IOVCC | -- | IOVCC | V |
3.2.3 Backlight LED Characteristics
The backlight driving condition is IF=40mA, Vf=18V(TYP). The circuit diagram shows a typical constant current sink driving the LED anode and cathode.
3.3 Interface & Pin Map (40-Pin Connector)
The module uses a 40-pin connector. The pinout integrates the MIPI interface, power supply, and backlight signals.
| Pin No. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | D0P | I | MIPI DSI Data Lane 0 Positive |
| 3 | D0N | I | MIPI DSI Data Lane 0 Negative |
| 4 | GND | P | Ground |
| 5 | D1P | I | MIPI DSI Data Lane 1 Positive |
| 6 | D1N | I | MIPI DSI Data Lane 1 Negative |
| 7 | GND | P | Ground |
| 8 | CLKP | I | MIPI DSI Clock Lane Positive |
| 9 | CLKN | I | MIPI DSI Clock Lane Negative |
| 10 | GND | P | Ground |
| 11-12 | NC | - | No Connection |
| 13 | GND | P | Ground |
| 14-15 | NC | - | No Connection |
| 16-17 | GND | P | Ground |
| 18-19 | IOVCC | P | I/O Power Supply |
| 20-23 | NC | - | No Connection |
| 24 | RESET | I | Global reset pin |
| 25-26 | NC | - | No Connection |
| 27 | GND | P | Ground |
| 28-29 | LED- | P | Power for LED backlight cathode |
| 30 | GND | P | Ground |
| 31 | NC | - | No Connection |
| 32-33 | GND | P | Ground |
| 34 | NC | - | No Connection |
| 35-36 | LED+ | P | Power for LED backlight anode |
| 37 | GND | P | Ground |
| 38-39 | VCC | P | Power voltage (2.8V) |
| 40 | NC | - | No Connection |
3.4 Optical Specifications
Optical characteristics are measured at θx = θy = 0°, Ta=25°C, after 15 min. warm-up.
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Response Time (Tr+Tf) | Tr+Tf | θx = θy = 0° | -- | 35 | 45 | ms |
| Contrast Ratio | CR | θx = θy = 0° | 640 | 800 | -- | -- |
| Transmittance | T% | θx = θy = 0° | 3.4 | 4.0 | -- | % |
| Color Chromaticity (White) - CIE1931 | Wx, Wy | θx = θy = 0° | -- | (0.305), (0.340) | -- | -- |
| Viewing Angle (All Directions) | θT, θB, θL, θR | CR > 10 | -- | 80 | -- | Deg. |
3.5 Interface Timing Characteristics (MIPI DSI)
The module supports MIPI DSI interface. Key High Speed (HS) mode characteristics (Test Condition: VDDI=1.8V, VDD=2.8V, AGND=DGND=0V, Ta=25°C).
3.5.1 High Speed (HS) Mode Characteristics
| Signal | Item | Symbol | Min | Max | Unit |
|---|---|---|---|---|---|
| RESX | Reset pulse duration | TRW | 10 | -- | us |
| RESX | Reset cancel (SLPIN mode) | TRT | -- | 5 | ms |
| RESX | Reset cancel (SLPOUT mode) | TRT | -- | 120 | ms |
Note: Spike rejection applies. A reset pulse shorter than 5us is rejected.
4. Application Guidelines & Critical Notes
When integrating the LS050I19-MP-V1 module, engineers must adhere to the specific guidelines outlined in the specification to ensure optimal performance and reliability.
- Power Supply (Dual Rail): The module requires two supply rails: VCC (2.8V typical) for internal analog power and IOVCC (1.65V-3.3V) for the I/O interface. The I/O voltage level must match the host's logic level.
- MIPI Interface (DSI): This is a 2-lane MIPI DSI interface (D0P/N, D1P/N). The host processor must have a compatible MIPI DSI transmitter. The PCB layout for the differential pairs must be carefully designed for controlled impedance (100-ohm differential) and matched trace lengths.
- Backlight Driver (External): The module provides separate LED+ and LED- pins. An external constant current driver is required, set to 40mA with a maximum forward voltage of 18V.
- Mechanical Integration: The module includes a LENS (cover glass). The specification notes critical mechanical guidelines such as: The enclosure viewing area should be 0.3mm smaller than the LENS VA per side, and the foam opening should be 0.6mm larger than the VA MDS per side. The TP edge cannot contact metal conductors.
- Handling Precautions: The module uses a glass LCD panel and LENS. Handle with care to avoid breakage. The module is RoHS compliant.
- Reset Timing: The reset pulse must be at least 10us wide. A pulse shorter than 5us is rejected. If reset is applied during Sleep Out mode, the display will blank for up to 120ms.
5. Conclusion & Design-In Support
The LS050I19-MP-V1 from Lesson Smart Display Technology is a well-designed 4.95-inch TFT-LCD module. Its combination of a high resolution (480x854), standard MIPI interface, wide viewing angle (IPS), and integrated LENS makes it a suitable choice for a wide variety of portable and industrial display applications.
For design-in support, it is strongly recommended to:
- Obtain and review the full Product Specification (Revision 1.0) for the complete set of electrical parameters, interface timing diagrams, and mechanical drawings.
- Design the power supply to provide both VCC (2.8V) and IOVCC rails. Design a constant current backlight driver (40mA at ~18V).
- Develop firmware using the standard MIPI DSI protocol for the ST7701SN driver IC.
- Contact the manufacturer for evaluation kits, sample requests, and technical support during the design-in phase.
This module is engineered to deliver reliable, clear, and premium-quality display performance for modern electronic products.
