LS0784I01-L-V1: 7.84-Inch TFT LCD Module, 400×1280 Resolution, COG+FPC+B/L, LVDS Interface, IPS, 16.7M Colors
Product Subtitle / Keywords
7.84 Inch Display, 400×1280 Resolution, TFT Active Matrix LCD Module, LVDS Interface, COG+FPC+B/L, IPS (ALL O'CLOCK) Viewing Direction, Display Colors 16.7M, Driver IC NV3051F, Connector XF2M-4015, Input Voltage 3.3V, Backlight 6S4P, Operating Temperature -20°C~70°C, Storage Temperature -30°C~80°C, Module Area 205.78*67.8 mm³, Active Area 190.08*59.4 mm², Lesson Smart Display Technology Co., Ltd
1. Executive Summary & Product Positioning
The LS0784I01-L-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is an 7.84-inch color active matrix TFT-LCD module.
This product specification (Revision 1.0, dated 2023-12-15) serves as the definitive technical document, defining its general information (including a 400×1280 resolution and 16.7M color display), external dimensions, absolute maximum ratings, electrical characteristics, interface description (LVDS), interface timing, reliability test conditions, inspection criteria, and packaging specifications.
The document provides the core parameters necessary for system integration into embedded display applications requiring a long, narrow aspect ratio display with an LVDS interface and IPS wide viewing angles. 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 active matrix type liquid crystal panel.
- Display Type: IPS (ALL O'CLOCK viewing direction), Transmissive type.
- Display Format: Graphic 400 × 1280 pixel array.
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight).
- Module Area (W×H×T): 205.78 × 67.8 mm³.
- Active Area (W×H): 190.08 × 59.4 mm².
- Interface Type: LVDS.
- Driver IC: NV3051F.
- Connector (Board side): XF2M-4015.
- Backlight: White LED, 6S4P (6 serial 4 parallel) configuration.
- Display Colors: 16.7M.
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Item (项目) | Contents (内容) | Unit (单位) |
|---|---|---|
| Module Model | LS0784I01-L-V1 | - |
| LCD Size (Diagonal) | 7.84 | inch |
| Resolution | 400 × 1280 | / |
| Display Colors | 16.7M | - |
| Display Mode | 7.84" TFT, IPS (ALL O'CLOCK), Transmissive | - |
| Recommended Viewing Direction | ALL O'Clock | - |
| Module area (W×H×T) | 205.78 × 67.8 | mm³ |
| Active area (W×H) | 190.08 × 59.4 | mm² |
| Module Type | COG+FPC+B/L | - |
| Driver IC | NV3051F | / |
| Interface Type | LVDS | / |
| Connector | XF2M-4015 | / |
| Input Voltage | 3.3 | V |
| Backlight Source | 6S4P | / |
| Operating Temperature | -20°C ~ 70°C | °C |
| Storage Temperature | -30°C ~ 80°C | °C |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Dispaly Technology Co.,Ltd) | - |
| Document Revision / Date | Revision 1.0 / 2023-12-15 | - |
3.2 Electrical & Interface Specifications
3.2.1 Absolute Maximum Ratings (极限参数)
| Parameter (参数) | Symbol (符号) | Min (最小值) | Max (最大值) | Unit (单位) |
|---|---|---|---|---|
| Supply voltage for logic | VCC/VCI/IOVCC | -0.3 | -- | V |
| Input voltage | VIN | -0.3 | -- | V |
| Operating temperature | Top | -20 | 70 | °C |
| Storage temperature | TST | -30 | 80 | °C |
| Humidity | RH | - | 90% (Max 60°C) | RH |
3.2.2 DC Characteristics (直流特性)
| Parameter (参数) | Symbol (符号) | Min (最小值) | Typ (典型值) | Max (最大值) | Unit (单位) |
|---|---|---|---|---|---|
| Supply voltage for logic | VDDI | - | 1.8V | - | V |
| Input Current | Idd | - | - | 100 | mA |
| Input voltage 'H' level | VIH | 0.8VCC | - | VCC | V |
| Input voltage 'L' level | VIL | -0.3 | - | 0.2VCC | V |
| Output voltage 'H' level | VOH | 0.8VCC | - | - | V |
| Output voltage 'L' level | VOL | - | - | 0.2VCC | V |
3.2.3 Backlight Characteristics (背光电气特性)
| Item (项目) | Symbol | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|---|
| Forward voltage | Vf | 20.4 | V | If=80mA Ta=25°C (without CTP) | ||
| Luminance | Lv | 800 | cd/m² | If=80mA Ta=25°C (without CTP) | ||
| Number of LED | - | Piece | - | |||
| Connection mode | P&S | 6S4P | - | - |
Note: Using condition: constant current driving method If= mA(+/-10%).
3.2.4 Electro-Optical Characteristics (光电参数)
| Parameter | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Viewing Angle (Horizontal) | θ3 / θ9 | CR > 10 | 70 | 80 | - | Deg. |
| Viewing Angle (Vertical) | θ12 / θ6 / θ8 | CR > 10 | 70 | 80 | - | Deg. |
Additional Optical Notes from Spec:
- Polarizer: The top polarizer will protrude 0.15mm above the bezel.
- Luminance Uniformity: Uniformity = (Min luminance / Max luminance) * 100%. Batch products should have uniformity above 80%.
- Tolerance for Luminance: Batch product finished brightness tolerance is ±10%.
- Tolerance for Chromaticity CIE: Batch product chromaticity tolerance is ±0.03.
- Measurement Instrument: BM-7, Test distance: 500mm, Angle: 1°, 9 Points.
- Viewing Angle: IPS (ALL O'CLOCK), typically 70°/80° (min/typ) under CR>10.
- Contrast Ratio: Not explicitly stated in the general specs but is part of optical characteristics.
3.3 Inspection Criteria (检查标准 - 轻缺陷示例)
The specification includes detailed inspection criteria based on GB/T 2828.1-2003 normal inspection level II. Below is a summary of some defects allowed for minor defects (AQL 1.5):
| Inspection Item | Specification (Size in mm) | Acceptable Qty |
|---|---|---|
| Fuzzy Spots (Black/White in Display Area) | Φ > 0.6 | 0 |
| Line Defects (Black, White, Hair, Foreign Matter in Display Area) | W ≤ 0.02 (Length ignored) | Ignore |
| Line Defects (Continued) | 0.02 < W ≤ 0.05, L ≤ 5.0 | 3 |
| Line Defects (Continued) | 0.05 < W ≤ 0.07, L ≤ 3.0 | 1 |
| Line Defects (Continued) | W > 0.07 | 0 |
| Scratches (Polarizer/TP Surface in Display Area) | W ≤ 0.03 (Length ignored) | Ignore |
| Scratches (Continued) | 0.03 < W ≤ 0.05, 5.0 < L ≤ 10.0 | 3 |
| Scratches (Continued) | 0.05 < W ≤ 0.08, L ≤ 5.0 | 1 |
| Glass Chipping (Edge) | X ≤ 1/3 of single glass edge length, Y ≤ 1.5mm, Z ignored | Acceptable |
| Display Uniformity (White Screen Test) | ≥ 70% | Pass |
4. Application Guidelines & Critical Notes
Intended Use
- Embedded display applications requiring an LVDS interface and a long, narrow aspect ratio (approximately 3.2:1).
- Applications where IPS (ALL O'CLOCK) viewing direction is required for consistent image quality from any angle.
- Systems requiring a 400×1280 resolution display with 16.7M color depth.
Critical Design Considerations
- IPS Technology (ALL O'CLOCK): This module features IPS (In-Plane Switching) with a recommended viewing direction of ALL O'Clock. This provides excellent wide viewing angles (70° to 80° Typ) from all directions, ensuring consistent color and contrast from any angle.
- Interface (LVDS): The module uses an LVDS (Low Voltage Differential Signaling) interface. Ensure the host system has a compatible LVDS transmitter that meets the module's interface timing requirements.
- Power Supply (VDDI/3.3V): The module requires a logic power supply VDDI (1.8V Typ) and a separate Input Voltage (3.3V). Both must be stable and within specified ranges.
- Backlight Driving: The backlight uses a 6S4P (6 serial, 4 parallel) LED configuration with a Typical forward voltage of 20.4V at 80mA constant current. Use a constant current LED driver design rated for 20.4V and 80mA.
- Luminance & Chromaticity Tolerance: Batch products have a ±10% tolerance on brightness and ±0.03 tolerance on CIE color coordinates. Account for this in your system's optical design.
- Uniformity Requirement: The specification requires uniformity ≥ 80% for batch products and ≥ 70% during inspection. This is measured as (Min luminance / Max luminance) × 100%.
- Temperature Limits: Operating Temperature: -20°C to +70°C. Storage Temperature: -30°C to +80°C. Maximum Humidity: 90% RH (Max 60°C).
- Mechanical Integration (Notes from Outline Drawing):
- The recommended TP (Touch Panel) window position and size are indicated by the FRAME VA on the drawing.
- For products with chassis foam, it is recommended that the foam enters the LCD vacuum area by 0.5mm MIN on each side.
- For products without chassis foam, the TP's black ink opening or LENS's black ink opening should be 0.6mm MAX larger than the LCD AA area on each side.
- The distance from the bottom surface of the touchscreen to the top surface of the glass must be at least 0.3mm (for non-laminated applications).
- Non-accumulative tolerance for dimensions: ±0.2mm for those without specific tolerance, ±0.3mm for XX, ±0.2mm for XXX.
Handling & Compliance
- The module is ROHS Compliant (materials and processes).
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass and FPC – handle with care.
- Avoid bending the FPC sharply, especially near the connector interface.
- Do not attempt to disassemble or process the LCD Module.
- NC terminals should be open. Do not connect anything.
- If the logic circuit power is off, do not apply the input signals.
- Polarizer is fragile; avoid contact with sharp objects.
- The top polarizer will protrude 0.15mm above the bezel. Account for this in mechanical stack-up.
5. Conclusion & Design-In Support
The LS0784I01-L-V1 specification details a unique 7.84-inch IPS display module with a narrow 400×1280 resolution, LVDS interface, 800 cd/m² typical luminance, and 80°/80° wide viewing angles from all directions — an excellent choice for applications requiring a long, narrow aspect ratio display with high-quality imaging.
Key Strengths
- Unique Aspect Ratio (400×1280): A 3.2:1 aspect ratio suitable for specific embedded applications (e.g., digital signage, panel meters, etc.).
- IPS (ALL O'CLOCK) Technology: Provides excellent wide viewing angles (80° Typ) and consistent color from any direction.
- LVDS Interface: High-speed serial interface suitable for high-resolution displays.
- High Luminance (800 cd/m²): Bright enough for many indoor and some outdoor applications.
- Detailed Inspection Criteria: Clear guidelines for acceptable defects, ensuring consistent quality.
- Comprehensive Specification: Covers all critical parameters from electrical characteristics to mechanical inspection.
Main Design Focus
- The critical design task is designing a constant-current LED driver for the 6S4P backlight configuration at IF=80mA and VF=20.4V (Typ), and ensuring the LVDS transmitter matches the module's interface timing.
- Supporting requirements: Provide stable VDDI (1.8V) and VCC (3.3V) power supplies. Account for the top polarizer protrusion (0.15mm) in mechanical design. Follow the mechanical integration notes for TP window and foam design. Ensure ESD precautions are followed.
This module is an excellent choice for applications requiring a long, narrow display with excellent viewing angles, high brightness, and a high-speed LVDS interface.
