Product Subtitle / Keywords:
2.83 Inch Display, 480(RGB)×640 Resolution, Transmissive a-Si TFT-LCD, MIPI Interface, COG+FPC+B/L, 16.7M Colors, 40-Pin, ST7701S Driver, 45.7×64.65×2.15 mm, 350 cd/m² Brightness, BOE/IPS, WVGA, -20°C~70°C Operating Temperature
1. Executive Summary & Product Positioning
The LS028I06-MP-V1, developed by Lixin (Wan'an) Intelligent Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 2.83-inch transmissive amorphous Silicon TFT-LCD (a-Si TFT-LCD) module.
This product specification (Revision 1.0, Module Type: COG+FPC+B/L) serves as the definitive technical document, defining its structural composition (COG+FPC+B/L), physical features, mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, complete MIPI interface pinout, and comprehensive electro-optical performance. It delivers a resolution of 480(RGB)×640 with 16.7M-color display capability, driven by the ST7701S controller.
The document provides the core parameters necessary for system integration into compact embedded display applications. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications, interface timing, and mechanical tolerances described herein to ensure reliable performance and compatibility.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive-type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display).
- Display Mode: Active matrix TFT, Transmissive type.
- Display Format: Graphic 480(RGB)×640 Dot-matrix.
- Display Characteristics: Capable of displaying up to 16.7 million colors.
- Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit). Composed of a TFT-LCD panel, a driver circuit, and a backlight unit.
- Input Data: MIPI.
- Viewing Direction (Grayscale Inversion): ALL (IPS) – wide viewing angle in all directions.
- Drive IC: ST7701S.
- Connector Pin Count: 40-Pin.
- Approval Status: ☑ Approved Product Specification only (as per signature block).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Item | Specification | Unit |
|---|---|---|
| Module size (H×V×D) | 45.7 × 64.65 × 2.15 | mm |
| Active area (H×V) | 43.2 × 57.6 | mm |
| Number of dots / Resolution | 480(RGB) × 640 | pixel |
| Panel Size (Diagonal) | 2.83 | inch |
Critical Mechanical Design Notes (from outline dimension drawing):
- Display Type: BOE/IPS/WVGA.
- Viewing Direction: ALL.
- Operating Temperature: -20°C ~ 70°C.
- Storage Temperature: -30°C ~ 80°C.
- Main LCD Driver: ST7701S.
- Backlight: 6 Chip-White LED Parallel.
- Module Luminance (without CTP): 300 CD/M² (MIN), 350 CD/M² (TYP).
- Color Chromaticity (CIE1931) White: X=0.29±0.03; Y=0.30±0.03.
- Polarizer: 上砂0.15/下光0.15MM.
- General Tolerance: ±0.20 mm.
- Angular Tolerance: ∠ ±1/4°.
- Enclosure Design Notes:
- It is recommended that the CTP V.A opening window be 0.3mm larger per side than the LCD AA.
- It is recommended that the housing lens opening window be 0.3mm larger per side than the LCD AA.
- It is recommended that the CTP foam opening window be 0.7mm larger per side than the LCD AA.
- It is recommended that the housing foam opening window be 0.9mm larger per side than the LCD AA.
- It is recommended that the housing shell material opening window be 0.6mm larger per side than the LCD AA.
- FPC Total Thickness: PI补强+FPC总厚=0.3mm.
- Backlight Thickness: BL 2.15±0.2mm.
- Polarizer Thickness: POL 0.15mm.
- Silver Paste Points: Present on the module.
- Yellow Insulation Paper: Included for handling during assembly.
- Backlight Circuit: IF=40mA, Vf=9.0V.
3.2 Electrical & Interface Specifications
3.2.1 Absolute Maximum Ratings
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 3.6 | V | Note1 Note2 |
| Supply voltage | IOVCC | -0.3 | 3.6 | V | Note1 Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1 Note2 |
Notes (interpreted):
- Note1/Note2: Stress beyond these ratings may cause permanent damage; functional operation is not implied under these conditions.
3.2.2 Electrical Characteristics (DC – Recommended Operating Conditions)
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 2.8 | 3.0 | 3.2 | V |
| Supply voltage | 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 |
3.2.3 Pin Description (40-pin FPC)
| PIN NO. | Symbol | Description |
|---|---|---|
| 1 | LEDA | Back-light Anode |
| 2 | LEDK | Back-light Cathode |
| 3 | VCC | Power supply for interface logic circuits(2.8V-3.2V) |
| 4 | GND | Power Ground |
| 5 | D0N | MIPI-DSI DATE signal input |
| 6 | D0P | MIPI-DSI DATE signal input |
| 7 | GND | Power Ground |
| 8 | CN | MIPI-DSI DATE signal input |
| 9 | CP | MIPI-DSI DATE signal input |
| 10 | GND | Power Ground |
| 11 | DN1 | MIPI-DSI DATE signal input |
| 12 | DP1 | MIPI-DSI DATE signal input |
| 13-33 | GND | Power Ground |
| 34 | RESET | Reset input pin |
| 35-37 | GND | Power Ground |
| 38 | VCC | Power supply for interface logic circuits(2.8V-3.2V) |
| 39 | GND | Power Ground |
| 40 | VCC | Power supply for interface logic circuits(2.8V-3.2V) |
| 31 | VCC | Power supply for interface logic circuits(2.8V-3.2V) |
| 32 | VCC | Power supply for interface logic circuits(2.8V-3.2V) |
Interface Summary:
- MIPI Interface: Uses 2 data lanes (D0N/D0P, DN1/DP1) and 1 clock lane (CN/CP) for high-speed serial data transmission.
- Backlight: Dedicated LEDA (Anode, Pin 1) and LEDK (Cathode, Pin 2) pins.
- Power: VCC (Pins 3, 38, 40, 31, 32) for main logic power supply, GND (Pins 4, 7, 10, 13-33, 35-37, 39) for ground.
- Control: RESET (Pin 34) for hardware reset.
3.2.4 Backlight Unit
| Item | Specification | Unit |
|---|---|---|
| LED Circuit | 6 Chip-White LED Parallel | — |
| Drive Condition | IF = 40mA, Vf = 9.0V | — |
Backlight Circuit Diagram (from document):
LEDA → [Backlight Circuit] → LEDK
IF = 40mA
VF = 9.0V
3.3 Optical & Electro-Optical Characteristics (Ta=25°C)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Module Luminance (without CTP) | L | — | 300 | 350 | — | cd/m² | |
| Color Chromaticity (CIE1931) White | W x | — | 0.26 | 0.29 | 0.32 | — | |
| Color Chromaticity (CIE1931) White | W y | — | 0.27 | 0.30 | 0.33 | — |
Notes (from document):
Note 1: Definition of Luminance Uniformity
Active area is divided into 9 measuring areas (Shown in below), every measuring point is placed at the center of each measuring area.
$$\text{ Luminance Uniformity}=\frac{\text{ Min Luminance of white among 9-points}}{\text{ Max Luminance of white among 9-points}}\times 100\%$$
Note 2: Definition of Response time
The output signals of photo detector are measured when the input signals are Changed from “black” to “white” (rising time) and from time “white” to “black” (falling time), Respectively.
3.4 Version Record
| Version | Revise Date | Page | Content |
|---|---|---|---|
| V0V0** | 2023-12-20 | 1 of 1 | Initial version |
4. Application Guidelines & Critical Notes
Intended Use
- Smartwatches, fitness trackers, and other wearable devices
- IoT display nodes and smart home controls
- Miniature handheld instruments
- Any application requiring a compact, high-resolution display with excellent IPS viewing angles
Critical Design Considerations
-
Interface (MIPI): This module uses a MIPI-DSI interface with 2 data lanes and 1 clock lane. The host MCU must have a MIPI-DSI controller that supports at least 2 data lanes.
-
Power Supply:
- Provide stable VCC (2.8V to 3.2V, 3.0V typical) for the main logic (connected to Pins 3, 38, 40, 31, 32).
- Provide stable IOVCC (1.65V to 3.3V, 1.8V typical) for the I/O interface.
- The backlight requires a constant-current LED driver connected to LEDA (Anode, Pin 1) and LEDK (Cathode, Pin 2), set to 40 mA at approximately 9.0V.
-
Mechanical Integration:
- Module Outline: 45.7mm (H) × 64.65mm (V) × 2.15mm (D).
- Active Area: 43.2mm × 57.6mm.
- FPC: The module uses a 40-pin FPC.
- Enclosure Design: The document provides specific recommendations for enclosure window openings relative to the LCD AA (Active Area):
- CTP V.A opening window: 0.3mm larger per side than LCD AA.
- Housing lens opening window: 0.3mm larger per side than LCD AA.
- CTP foam opening window: 0.7mm larger per side than LCD AA.
- Housing foam opening window: 0.9mm larger per side than LCD AA.
- Housing shell material opening window: 0.6mm larger per side than LCD AA.
-
Viewing Angle Characteristics:
This is an IPS panel with excellent viewing angle performance (ALL viewing direction). -
Optical Performance:
- Module Luminance: 300 cd/m² (Min), 350 cd/m² (Typ) – high brightness for good readability.
- Color Chromaticity (CIE1931) White: Wx = 0.29±0.03, Wy = 0.30±0.03.
-
Temperature Limits:
- Operating Temperature: -20°C to +70°C.
- Storage Temperature: -30°C to +80°C.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass and a 40-pin FPC – handle with care.
- Avoid bending the FPC sharply, especially near the connector interface.
- The module has a total thickness of 2.15mm – be careful when handling to avoid flexing.
- The module includes a yellow insulation paper for handling during assembly.
5. Conclusion & Design-In Support
The LS028I06-MP-V1 specification details a high-performance 2.83-inch IPS display module with MIPI interface and ST7701S driver — an excellent choice for compact display applications requiring high resolution and excellent image quality.
Key Strengths:
-
High Resolution: The 480×640 resolution in a 2.83-inch format provides excellent pixel density for sharp text and graphics.
-
Excellent IPS Technology: ALL viewing direction ensures consistent image quality from any perspective — essential for wearable devices.
-
High Brightness: 350 cd/m² (Typ) ensures good readability in indoor conditions.
-
High Color Depth: 16.7M colors (24-bit true color) provides excellent color reproduction.
-
Standard 40-pin FPC: The 40-pin FPC provides a robust connection interface.
-
Wide Operating Temperature Range: -20°C to +70°C for operation and -30°C to +80°C for storage.
Main Design Focus:
- The critical design task is properly implementing the MIPI-DSI interface with the correct timing and lane configuration.
- Supporting requirements:
- Provide stable VCC (3.0V typical) and IOVCC (1.8V typical) power.
- Provide a constant-current backlight driver set to 40 mA at 9.0V.
- Mechanical integration — the module outline is 45.7mm × 64.65mm × 2.15mm.
- FPC connector — verify the 40-pin FPC.
This module is an excellent choice for high-end wearable devices, smartwatches, and any compact IoT application requiring a high-resolution IPS display with excellent image quality.
