LESSON LS0784I01-L-V1 7.84-Inch TFT-LCD Display Module: Complete Technical Specifications

Publication Date: March 6, 2026
Keywords: LS0784I01-L-V1, 7.84 inch LCD, 400x1280 TFT, NV3051F Driver, LVDS Interface, Wide Temperature, Industrial Display, Automotive Display, High Brightness, RoHS

1. Product Overview & General Description

The LS0784I01-L-V1 is a high-quality, narrow-format transmissive TFT-LCD module designed for applications requiring a unique, elongated display area. Its distinctive 400x1280 resolution and compact form factor make it ideal for displaying vertical data streams, status bars, or instrument readouts in space-constrained environments.

Core Identity:

• Manufacturer: LESSON Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司)
• Model Number: LS0784I01-L-V1
• Document: LS0784I01-L-V1(SPEC).pdf
• Revision: 1.0
• Release Date: 2023-12-15

Fundamental Specifications:

• Display Type: Transmissive TFT-LCD
• Panel Size: 7.84 inch (Diagonal)
• Resolution: 400 (RGB) × 1280 pixels
• Display Colors: 16.7 Million colors
• Module Construction: LCD Panel + Driver IC + Backlight Unit (LCM)
• Interface: LVDS (Low-Voltage Differential Signaling)

2. Absolute Maximum Ratings

Note: Stresses beyond these ratings may cause permanent damage. Functional operation is not implied.

3. General Specifications

4. Electrical Characteristics

4.1 DC Characteristics

4.2 Backlight Electrical Characteristics

Backlight Uniformity Note: Uniformity is defined as the ratio of the minimum surface brightness to the maximum surface brightness measured at five specific test points (P1 to P5) when displaying a full white screen. Refer to FIG. 2 in the specification for test point locations.
Formula: Uniformity = Min(P1, P2, P3, P4, P5) / Max(P1, P2, P3, P4, P5)

5. Mechanical Specifications

• Module Dimensions: 205.78mm (Width) × 67.8mm (Height). Thickness is defined in the mechanical drawings.
• Active Area: 190.08mm × 59.4mm. This defines the exact viewable region.
• Aspect Ratio: The active area yields an aspect ratio of approximately 3.2:1 (190.08/59.4), characteristic of a very wide, short display.
• Connector: The module uses an XF2M-4015 connector for interfacing with the host mainboard. The mating connector must be selected accordingly.
• Mounting: The module is designed for integration into a host system. Mechanical drawings in the full specification provide precise dimensions, mounting hole locations, and tolerances.

Design Consideration: The elongated form factor requires careful housing design to support the module along its length and prevent flexing.

6. Interface Pin Description (LVDS)

The interface definition is provided for the LCD connector. Below is a partial pinout based on the document:

Note: This is a partial list. The full connector has more pins, including additional data lanes and grounds. The complete pinout table is in the specification.

Interface Summary: The module uses a standard LVDS interface with multiple data lanes (e.g., D0, D1, D2, D3) and a clock pair. This interface is robust against noise and suitable for longer cable runs compared to parallel RGB.

7. Optical Characteristics

• Brightness: Typical luminance is 800 cd/m² when the backlight is driven at 80mA per string (If=80mA) at 25°C. This is a high-brightness specification, suitable for environments with high ambient light.
• Color Depth: 16.7M colors (8-bit per color channel) provide smooth color gradients.
• Viewing Direction: Recommended for "ALL O'Clock" direction, indicating good viewing angle performance suitable for viewing from various positions.

8. Quality & Inspection Standards

The specification includes detailed criteria for classifying defects, which are crucial for quality assurance during incoming inspection.

8.1 Minor (Light) Defects

Defects that do not severely impact core functionality but affect appearance. The specification provides a detailed table with criteria for various flaws.

Examples from Document:

• Blurry Points within Display Area: Points with fuzzy edges where Φ > 0.6mm are considered defects.
• Line Defects (Black/White lines, hair, foreign material):
  • Width (W) ≤ 0.02mm: Ignored.
  • 0.02mm < W ≤ 0.05mm, Length (L) ≤ 5.0mm: Allowed up to 3.
  • 0.05mm < W ≤ 0.07mm, L ≤ 3.0mm: Allowed up to 1.
  • W > 0.07mm: Not allowed (0).
• Scratches on Polarizer or Touch Screen Surface:
  • W ≤ 0.03mm: Ignored.
  • 0.03mm < W ≤ 0.05mm, 5.0mm < L ≤ 10.0mm: Allowed up to 3.
  • 0.05mm < W ≤ 0.08mm, L ≤ 5.0mm: Allowed up to 1.

Note: All appearance defects not classified as "Major Defects" are listed as "Light Defects."

8.2 Major (Heavy) Defects

The document states that aside from the aforementioned functional defects, all other defects are considered minor. This implies that major defects would include catastrophic failures such as:

• No display
• Multiple missing lines
• Electrical overcurrent/short
• Physical damage to the active area

9. Application Scenarios

1. Industrial Instrumentation & Process Control:

• Why it fits: The 400x1280 resolution is perfect for vertical trend graphs, long lists of parameters, or multi-channel monitoring displays. The high brightness (800 cd/m²) ensures readability in well-lit control rooms or factories. The wide operating temperature (-20°C to +70°C) suits industrial environments.

2. Automotive Digital Instrument Cluster / Center Stack:

• Why it fits: The elongated shape mimics traditional gauge clusters or can serve as a secondary information display beside a main screen. LVDS interface is common in automotive systems for its noise immunity. The form factor saves dashboard space.

3. Portable Test & Measurement Equipment:

• Why it fits: The compact height (67.8mm) allows integration into handheld or portable devices where panel height is constrained. It can display detailed waveform data or long log files.

4. Specialized Kiosks & Information Displays:

• Why it fits: Ideal for ticketing systems, queue management displays, or narrow information panels where information is presented in a vertical, scrolling format.

5. Medical Monitoring Devices:

• Why it fits: Can display extended patient vital sign histories or multi-parameter lists in a compact form factor.

10. Integration Notes & Summary

Key Strengths of LS0784I01-L-V1:

1. Unique Form Factor: The 7.84-inch, 400x1280 resolution offers a highly specialized aspect ratio for vertical information display.
2. High Brightness: 800 cd/m² typical brightness enables use in high-ambient-light conditions.
3. Robust Interface: LVDS provides reliable, noise-resistant data transmission.
4. Industrial Ruggedness: Wide operating temperature range and clear defect classification support use in demanding applications.

Critical Integration Checklist:

1. Power Supply: Provide a stable 3.3V input for VCC and ensure the 1.8V VDDI rail is properly generated (likely internally by the NV3051F or requires external LDO). Do not exceed absolute maximum ratings.
2. Backlight Driver: Design a constant current LED driver for the 6S4P configuration. The driver must supply ~20.4V per string (6 LEDs in series) at a typical current of 80mA per string. Four strings require a total current of ~320mA.
3. LVDS Host: Ensure the host processor's LVDS transmitter matches the module's lane configuration and electrical levels. Pay attention to the RESET and STBTB control signals for proper power sequencing.
4. Mechanical Integration: The module is long and narrow (205.78mm x 67.8mm). Ensure the housing provides adequate support across the entire length to prevent bending stress on the LCD panel and FPC.
5. Thermal Management: The backlight, when driven at full current, will generate significant heat. Consider thermal paths, especially in enclosed spaces, to maintain LED longevity and prevent overheating.

Disclaimer: This technical summary is based on the provided excerpts from the LS0784I01-L-V1 specification. For complete details, critical mechanical drawings, absolute maximum ratings, and final design verification, always obtain and consult the official "LS0784I01-L-V1(SPEC).pdf" document from LESSON Smart Display Technology Co., Ltd. Specifications are subject to change.