LESSON LS126I01-E-V1 12.61-Inch TFT-LCD Module: Complete Product Specification

Document Revision: P2 (Issued 2020.04.01)
Publication Date: October 23, 2020 (Uploaded Dec 23, 2025)
Keywords: LS126I01-E-V1, 12.61 inch LCD, Touch Bar, FHD, 1920x515, eDP 1.2, a-Si TFT, Notebook, Product Specification

1. GENERAL DESCRIPTION

1.1 Introduction

The LS126I01-E-V1 is a color active matrix TFT LCD module using amorphous silicon (a-Si) TFTs as active switching devices. This module has a 12.61-inch diagonally measured active area with FHD resolutions (1920 horizontal by 515 vertical pixel array). Each pixel is divided into RED, GREEN, BLUE dots arranged in a vertical stripe. This module can display 16.7M (8-bit) colors with a color gamut of 45% NTSC. The TFT-LCD panel used is a low-reflection and higher-color type. Therefore, this module is specifically designed and suitable for Notebook Touch Bar applications. The LED driver circuit for backlight driving is built into this module.

All input signals are eDP 1.2 interface compatible.

1.2 Features

• Interface: 2-lane eDP interface with 2.7 Gbps link rate.
• Physical: Thin and lightweight design.
• Color: 16.7M (8-bit) color depth, 45% NTSC color gamut.
• Backlight: Single LED lighting bar (Bottom side).
• Signal Mode: Data enable (DE) signal mode.
• Mounting: Side mounting frame.
• Environmental: Green product (RoHS & Halogen free).
• Integration: On-board LED driving circuit.
• Efficiency: Low driving voltage and low power consumption.
• Compliance: On-board EDID chip; DPCD Version 1.4.
• Functions: SDRRS(on) / CABC(on) / LED PFM MODE(off).

1.3 System Block Diagram

eDP Connector --> Timing Controller (T-CON)
    |
    |--> SPI --> Flash
    |--> Data Signal --> S-Driver (Source Driver)
    |--> VCORE/DVDD --> DC/DC Converter
    |--> VDD --> LED Driver
    |
    VDD (from DC/DC) --> LED Driver --> LEDOUT --> LED Lighting Bar
    |
    TFT LCD Panel (1920×515 RGB) <-- GOA (Gate Driver) <-- S-Driver

2. ABSOLUTE MAXIMUM RATINGS

Ta = 25±2°C

Notes:

1. Permanent damage may occur if maximum values are exceeded.
2. Temperature and humidity ranges are defined: Max 95% RH at Ta≤40°C; Max wet-bulb temp 39°C at Ta>40°C; No condensation allowed.

3. ELECTRICAL SPECIFICATIONS

3.1 Main Electrical Specifications

Ta = 25±2°C

Notes:

1. Measured at the interface connector. Current and power specified for 3.3V at 25°C. Mosaic pattern refers to an 8*4 test pattern.
2. Backlight Unit power.
3. Inrush current measurement condition defined in Figure 5.

3.2 Backlight Unit Specifications

Ta = 25±2°C

Notes:

1. Power supply voltage for LED driver is 12V. P_LED is a calculated reference value.

4. OPTICAL SPECIFICATIONS

4.1 Measurement Conditions

Measured in a dark room (≤1 lux) at 25±2°C, using a goniometer system (e.g., TOPCON BM-5) at a distance of 50cm from the LCD surface with viewing angles θ and Φ equal to 0°. The backlight operates for 30 minutes prior to measurement. V_DD = 3.3±0.3V. Optimum viewing direction is 6 o'clock.

4.2 Optical Specification Table

Notes:

1. Viewing angle where contrast ratio > 10.
2. CR = Luminance(White) / Luminance(Black).
3. Uniformity ΔY = Min Luminance / Max Luminance across measured points.
4. Crosstalk measured per Figure 11. CT(%) = |(Y_B - Y_A)/Y_A| × 100%.

5. INTERFACE CONNECTION

5.1 Electrical Interface Connector

The electronics interface connector is an eDP type. The mating connector part number is UJU IS050-L30B-C10 (30-pin).

6. SIGNAL TIMING SPECIFICATION

6.1 Basic Timing (DE Only Mode)

6.2 HPD & AUX Characteristics

7. MECHANICAL CHARACTERISTICS

8. POWER SEQUENCE

A detailed power sequence diagram and table are provided in the specification. Key requirements include:

• Logic Power (V_DD) Ramp: Must rise from 10% to 90% within a time T11, where 0.5ms ≤ T11 ≤ 10ms.
• Specific sub-periods like T20, T21, T22 are defined with constraints (e.g., T21 ≥ 0.225ms).
• Critical Rule: T11 = T20 + T21 + T22.
• Video Signal: Must be valid (non-high impedance) after power is stable. Backlight should be turned on only after the logic power and interface signals are valid.

9. RELIABILITY TEST

The module is subjected to a comprehensive suite of reliability tests:

10. HANDLING & CAUTIONS

Critical warnings for safe handling and operation:

• ESD Protection: Electrostatic discharge can break the module. Handle with care and peel protective sheets slowly.
• Surface Cleaning: The polarizer surface is soft. Use a soft, dry cloth without chemicals.
• Connector: Do not plug/unplug the interface connector while the module is operating.
• Placement: Place the module display-side down on a flat, horizontal surface.
• Power Sequence: Must obey the specified supply voltage sequence. Wrong sequence can damage the module.
• Environment: Avoid dew condensation. Do not store/operate in high temperature/humidity. Recommended storage: in a conductive polymer pouch at low temperature.
• Image Sticking: Do not apply a fixed pattern signal for a long time during product aging, as it may cause image sticking.

11. APPLICATION & INTEGRATION SUMMARY

11.1 Primary Application: Notebook Touch Bar

This module is explicitly designed for the secondary, narrow display strip above the keyboard in modern laptops, often used for dynamic function keys, system controls, and application shortcuts.

11.2 Key Integration Points

1. Interface: Host must provide a 2-lane eDP 1.2 source with 2.7 Gbps capability.
2. Power: Two supplies needed: 3.3V for logic (max ~303mA for full RGB) and 5-20V (12V typ.) for backlight (max 200mA).
3. Control: Utilize HPD for plug detection, BL_ENABLE and BL_PWM for backlight control, and CABC for content-adaptive brightness control.
4. Mechanical: The 315.61mm x 94.02mm outline and side-mounting frame are designed for integration into a laptop chassis.
5. Software: The on-board EDID (Extended Display Identification Data) provides the display's identity and supported modes to the host system. The full EDID table is provided in the specification.

Conclusion: The LS126I01-E-V1 is a highly specialized, ultra-wide and narrow 12.61-inch FHD display module engineered from the ground up for the Notebook Touch Bar application. It combines a unique 1920x515 resolution, a modern eDP 1.2 interface with integrated LED driver, and a form factor tailored for laptop integration, making it a complete and optimized solution for this niche but important market segment.

Final Disclaimer: This document is a comprehensive summary extracted from the provided LS126I01-E-V1 (SPEC).pdf (Rev. P2). For production design, the complete, official specification document from LESSON must be obtained and followed. All specifications, tolerances, and sequences are subject to the final, released version.