LS050I27-R-V1: 5.0-Inch TFT LCD Module, 800×480 Resolution, 16.7M Colors, RGB Interface, 40-Pin, Touch Panel Support
Product Subtitle / Keywords
5.0 Inch Display, 800(RGB)×480 Resolution, TFT-LCD Module, RGB Interface (24-bit), COG+FPC+B/L, 16.7M Colors, 40-Pin, 500 cd/m² Brightness, 800:1 Contrast Ratio, 80° Viewing Angle, -20°C~70°C Operating Temperature, Resistive Touch Panel, RoHS
1. Executive Summary & Product Positioning
The LS050I27-R-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 5.0-inch TFT-LCD (Thin Film Transistor Liquid Crystal Display) 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), general specifications, absolute maximum ratings, electrical characteristics, complete RGB interface pinout (40-pin), and electro-optical characteristics. It delivers a resolution of 800×480 (WVGA) with 16.7M-color display capability.
The document provides the core parameters necessary for system integration into embedded display applications requiring a standard widescreen format with a parallel RGB interface and integrated touch panel support. 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: TFT-LCD module composed of a TFT-LCD panel, driver IC, FPC, and a backlight unit.
- Display Mode: 16.7M TFT / Transmissive.
- Display Format: Graphic 800 × 480 (WVGA) pixels.
- 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).
- Input Data: RGB Interface (24-bit parallel).
- Drive IC: Not specified in the provided document snippet.
- Connector Pin Count: 40-Pin.
- Touch Panel: Includes touch panel control pins (X1, Y1, X2, Y2) for 4-wire resistive touch.
- Approval Status: ☑ Approved Product Specification only (as per signature block).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Panel Size (Diagonal) | 5.0 inch |
| Number of dots / Resolution | 800 × 480 pixel |
| Display Characteristics | 16.7M colors |
| Display Type | 5.0" TFT-LCD, Transmissive |
| Module Outline Dimension (W×H×D) | 120.70 (W) × 73.70 (H) × 6.26 (D) mm (Typ.) (from outline drawing) |
| Display Area (AA) | 108.00 (W) × 64.80 (H) mm |
| BZL Opening Area | 110.60 (W) × 67.60 (H) mm |
| Backlight Type | 12 chip White LEDs, 2 Parallel (6串2并) |
| FPC Length | 26.5 mm (from drawing) |
| Weight | Not specified. |
Critical Mechanical Design Notes (from outline dimension drawing):
- Display Mode: 16.7M TFT / Transmissive.
- Operating Temperature: -20°C ~ +70°C.
- Storage Temperature: -30°C ~ +80°C.
- Backlight: 12 chip White LEDs, 2 Parallel (6串2并).
- General Tolerance: ±0.2 mm (unless otherwise specified).
- Angular Tolerance: ∠ ±1/4° (from drawing).
- FPC Width: 20.50±0.10 mm (from drawing).
- FPC Reinforcement: 0.35±0.03 mm thickness, located on the back of the FPC.
- LED Circuit Diagram: Documented on the outline drawing.
- Dimensions marked with "*" are important; dimensions marked with "()" are referenced.
- Without FPC and solder.
3.2 Electrical & Interface Specifications
3.2.1 Absolute Maximum Ratings (Ta=25°C)
Electrical Absolute Maximum Ratings (Vss=0V, Ta=25°C):
- Exceeding these ratings may permanently damage the module.
- VDD must be maintained above Vss.
- Users must be grounded when handling the LCD module.
Environmental Absolute Maximum Ratings:
| Item | Storage Min. | Storage Max. | Operating Min. | Operating Max. | Unit | Note |
|---|---|---|---|---|---|---|
| Ambient Temperature | -30 | 80 | -20 | 70 | °C | 1, 2 |
| Humidity | Ta≤40°C: 85%RH MAX. Ta≥40°C: Absolute humidity must be lower than the humidity of 85%RH at 40°C. | 3 | ||||
Notes:
- The response time will become lower when operated at low temperature.
- Background color changes slightly depending on ambient temperature. The phenomenon is reversible.
- Ta≤40°C:85%RH MAX. Ta≥40°C:Absolute humidity must be lower than the humidity of 85%RH at 40°C.
3.2.2 Electrical Characteristics (Vss=0V, Ta=25°C)
Detailed electrical characteristics (VDD, IDD, etc.) are provided in the full specification (Section 6.1).
3.2.3 Backlight Unit
- Configuration: 12 chip White LEDs (6串2并).
- Drive Condition: Optimal driving is in constant current mode.
- Recommended Current: LED current = 20mA (from Note 2, Section 6.1).
- Backlight Pins:
- Pin 1 (LED_K): Backlight LED Ground.
- Pin 2 (LED_A): Backlight LED Power.
3.2.4 Interface Signals (40-pin)
The module uses a 24-bit RGB parallel interface with dedicated synchronization signals. The pinout includes:
| Pin Group | Pins | Description |
|---|---|---|
| Red Data Bus | 5-12 (R0-R7) | 8-bit red data. |
| Green Data Bus | 13-20 (G0-G7) | 8-bit green data. |
| Blue Data Bus | 21-28 (B0-B7) | 8-bit blue data. |
| Clock | 30 (PCLK) | Data clock for pixel data. |
| Synchronization | 32 (HSYNC), 33 (VSYNC) | Line and frame synchronization signals. |
| Data Enable | 34 (DE) | Data enable input. |
| Standby Mode | 31 (DISP) | Standby mode select pin. |
| Power | 4 (VDD), 3 & 29 & 36 (GND) | Power supply (VDD) and Ground (GND). |
| Backlight | 2 (LED_A), 1 (LED_K) | Backlight LED power and ground. |
| Touch Panel (4-Wire) | 37 (X1), 38 (Y1), 39 (X2), 40 (Y2) | Touch panel control pins for a 4-wire resistive touch screen. |
| Not Connected | 35 (NC) | No connect. Leave floating. |
3.3 Optical Characteristics
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Note |
|---|---|---|---|---|---|---|---|
| Brightness | Bp | θ = 0°, Φ = 0° | - | 500 | - | Cd/m² | 1 |
| Uniformity | ΔBp | θ = 0°, Φ = 0° | 75 | 80 | - | % | 1,2 |
| Viewing Angle (CR≥10) | 3:00 | CR≥10 | 70 | 80 | - | Deg | 3 |
| 6:00 | CR≥10 | 70 | 80 | - | Deg | 3 | |
| 9:00 | CR≥10 | 70 | 80 | - | Deg | 3 | |
| 12:00 | CR≥10 | 70 | 80 | - | Deg | 3 | |
| Contrast Ratio | Cr | θ = 0°, Φ = 0° | 600 | 800 | - | - | 4 |
| Response Time | Tr+Tf | θ = 0°, Φ = 0° | - | 30 | 40 | ms | 5 |
| Color Coordinates (White) | Wx / Wy | θ = 0°, Φ = 0°, ILED=20mA | 0.27/0.29 | 0.32/0.34 | 0.37/0.39 | - | 1,6 |
Notes:
- The data is measured after LEDs are turned on for 5 minutes. LCM displays full white. The brightness is the average value of 9 measured spots. Measurement equipment: PR-705 (Φ8mm).
- Uniformity = Min(Bp)/Max(Bp).
- Viewing angle range measured with a Goniometer system (DMS501).
- Contrast Ratio = Bp (White) / Bp (Black).
- Response time measured using DMS501. Tr is the time from 90% to 10% (black to white), Tf is from 10% to 90% (white to black).
- Color coordinates are measured at the center of the display.
3.4 Reliability Test Items and Criteria
| No. | Test Item | Test Condition | Criterion |
|---|---|---|---|
| 4 | Low Temperature Operation | -20°C±2°C, 96H, Restore 4H at 25°C, Power on | 1. After testing, cosmetic and electrical defects should not happen. 2. Total current consumption should not be more than twice of initial value. |
| 5 | High Temperature/Humidity Operation | 60°C±2°C, 90%RH, 96H, Power on | |
| 6 | Temperature Cycle | -30°C⇄80°C, 30min/5min/30min, 5 cycles, Restore 2H at 25°C, Power off | |
| 7 | Vibration Test | 10Hz~150Hz, 100m/s², 120min | Not allowed cosmetic and electrical defects. |
3.5 Inspection Items and Criteria
The specification provides detailed visual inspection criteria for dot defects, line defects, particles, bubbles, polarizer defects, glass defects, and PCB defects. Key criteria include:
- Dot Defect Criteria: The viewing area is divided into A (center) and B (periphery) zones for inspection. Bright spots of any size are not permitted.
- Line Defect Criteria: Defects are classified by width (W) and length (L). Smaller defects are neglected, while larger defects have specific acceptable quantities per zone.
- Glass Defect: Cracks are evaluated based on location and proximity to seals and patterns.
- Short circuit, Open segment, False viewing direction, Contrast ratio uneven, Crosstalk: Not permitted.
3.6 Version Record
Revision 1.0, dated 2019.07.03.
4. Application Guidelines & Critical Notes
Intended Use
- Industrial control panels and human-machine interfaces (HMIs)
- IoT display nodes and smart home controls
- Handheld instruments and consumer electronics
- Any application requiring a standard widescreen display with a parallel RGB interface
Critical Design Considerations
- Interface (24-bit Parallel RGB): This module uses a standard 24-bit parallel RGB interface with separate HSYNC, VSYNC, PCLK, and DE signals. A suitable host controller with an RGB interface is required.
- Power Supply: Provide a stable VDD power supply. The backlight requires a constant-current LED driver connected to LED_A (Pin 2) and LED_K (Pin 1), with a recommended drive current of 20mA.
- Touch Panel: The module includes a 4-wire resistive touch panel interface (X1, Y1, X2, Y2). The host must include a touch controller to read these analog inputs.
- Mechanical Integration: Module outline: 120.70mm × 73.70mm × 6.26mm. Active area: 108.00mm × 64.80mm. Bezel opening: 110.60mm × 67.60mm. FPC: 40-pin, with reinforcement.
- Temperature Limits: Operating Temperature: -20°C to +70°C. Storage Temperature: -30°C to +80°C.
- ESD Protection: Ensure all users are grounded when handling the LCD module.
Handling & Compliance
- The module is RoHS compliant.
- 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.
- Do not apply excessive force to the display surface.
5. Conclusion & Design-In Support
The LS050I27-R-V1 specification details a standard 5.0-inch widescreen display module with a parallel RGB interface and integrated resistive touch panel — an excellent choice for applications requiring a reliable and widely supported display interface.
Key Strengths
- Standard WVGA Resolution (800×480): Widely supported by many MCUs and graphics controllers.
- Parallel RGB Interface: Simple and proven interface with no high-speed lane routing complexity.
- Integrated Resistive Touch Panel: Built-in 4-wire touch panel interface reduces BOM and simplifies design-in.
- High Brightness: 500 cd/m² (Typ.) suitable for indoor use.
- High Contrast Ratio: 800:1 (Typ.) for crisp image reproduction.
- Wide Operating Temperature Range: -20°C to +70°C for versatile application environments.
- Good Viewing Angles: 80° (Typ.) in all four directions.
Main Design Focus
- The critical design task is connecting the 24-bit parallel RGB interface (including PCLK, HSYNC, VSYNC, DE) from the host controller to the module's 40-pin FPC.
- Supporting requirements: Provide stable power (VDD) and a constant-current backlight driver (20mA). Connect the 4-wire resistive touch panel (X1, Y1, X2, Y2) to a touch controller. Mechanical integration — the module outline is 120.70mm × 73.70mm × 6.26mm.
This module is an excellent choice for industrial control panels, HMIs, and any embedded application requiring a standard, reliable display with touch support.
