LS156I08-L-V1 15.6 Inch LCD Module 1920x1080 16.7M Colors
1. Executive Summary & Product Positioning
The LS156I08-L-V1 is a 15.6-inch color active matrix liquid crystal display module with a light emitting diode (LED) backlight assembly with LED driver developed by 立信（万安）智显科技有限公司 (Lesson Smart Display Technology Co., Ltd). The matrix employs a-Si thin film transistor as the active element. This module is a diagonal 15.6" color active matrix LCD module with 2ch-LVDS interface, which open cell is a transmissive type display operating in the normally black mode. It supports 1920 x 1080 FHD resolution and can display up to 16.7M colors (8bit). Each pixel is divided into Red, Green and Blue sub-pixels which are arranged in vertical stripe. This module dedicates for Public information display products and provides excellent performance which includes high contrast ratio, high color saturation and high color depth. CSOT open cell comply with RoHS for identification. The product specification is Revision 1.0.
Product Positioning: This 15.6-inch module is ideally suited for Public Information Display products, digital signage, and other applications requiring high resolution, vibrant colors, and reliable performance in a standard large-format display.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 15.6-inch diagonal, a-Si TFT active matrix, transmissive, normally black. Resolution is 1920(H) × 1080(V) pixels.
- Driver Circuit and Interface: The module utilizes a 2ch-LVDS interface for high-speed data transmission.
- Backlight Unit (B/L): Integrated LED backlight assembly with an LED driver. The backlight consists of LED strings with specific voltage and current requirements (see section 3.3.1).
- Mechanical Construction: COG (Chip-on-Glass) + PCB + B/L.
- Display Mode: Transmissive, Normally Black.
- Environmental Compliance: Compliant with RoHS standards.
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 15.6 inches |
| Resolution (Dots) | 1920(H) × 1080(V) |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, Normally Black |
| Module Construction | COG+PCB+B/L |
| Color Depth | 16.7M Colors (8bit) |
| Input Data Interface | 2ch-LVDS |
| Pixel Arrangement | RGB Vertical Stripe |
| Display Mode | Transmissive, Normally Black |
| Backlight Type | LED (with LED driver) |
| Operating Temperature (Ambient) | 0°C to +50°C |
| Storage Temperature | -20°C to +60°C |
| Environmental Compliance | RoHS |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage to the unit.
| Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|
| Power Supply Voltage | VCC | -0.3 | 13.2 | V |
| Input Signal Voltage | VIN | -0.3 | 3.6 | V |
3.3 Electrical Characteristics
3.3.1 Backlight LED Characteristics
Condition: 100% duty ratio of LED chip, LED Life Time (If=25mA). For detailed optical characteristics, refer to Section 3.5.
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|
| LED String Current | IS | 22.5 | 25 | 27.5 | mA | - |
| LED String Voltage | VS | 24.3 | 26 | 28.8 | Volt | - |
| LED Light Bar Power Consumption | PBLU | 4.05 | 4.32 | 4.59 | Watt | (2) |
| LED Life Time | LTLED | 15,000 | - | - | Hour | If = 25mA (3) |
| Backlight On/Off Voltage (High Level) | VBL-EN | 1.6 | 3.3 | 3.6 | V | - |
| Backlight On/Off Voltage (Low Level) | VBL-EN | 0 | 0 | 0.6 | V | - |
| PWM Control Frequency | FPWM | 0.1 | 1 | 20 | KHz | - |
3.4 LVDS Interface Characteristics
The TFT LCD open cell is operated in DE only mode; H sync and V sync input signal have no effect on normal operation.
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
|---|---|---|---|---|---|---|
| Differential Input High Threshold Voltage | VTH | +100 | - | - | mV | (1) |
| Differential Input Low Threshold Voltage | VTL | - | - | -100 | mV | (1) |
| Common Input Voltage | VCM | 1.0 | 1.2 | 1.4 | V | (1) |
| Differential Input Voltage (Peak to Peak) | VID | 100 | - | 600 | mV | (1) |
| Terminating Resistor | RT | 87.5 | 100 | 112.5 | Ohm | (1) |
| CMOS Input High Threshold Voltage | VIH | 2.7 | - | 3.3 | V | (1) |
| CMOS Input Low Threshold Voltage | VIL | 0 | - | 0.7 | V | (1) |
Note (1): Please make sure the range of pixel clock follows the equations in the full specification. Main frequency Max is 96Mhz without spread spectrum.
3.5 Electro-Optical Characteristics
Measuring Condition: Ta=25°C, dark room. Instrument: CS2000, ELDIM OPTI Scope-SA and ELDIM EZ contrast.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Note |
|---|---|---|---|---|---|---|---|
| Luminous Uniformity (5 points) | ΔL5 | θH=0°, θV=0°, Normal direction, ILED=25mA | 80 | 85 | - | % | (4) |
| Luminous Uniformity (13 points) | ΔL13 | θH=0°, θV=0°, Normal direction, ILED=25mA | 62.5 | 70 | - | % | (4) |
| White Chromaticity (CIE1931) | WX | θH=0°, θV=0°, Normal direction, ILED=25mA | Typ.-0.03 | 0.313 | Typ.+0.03 | - | (2)(6) |
| White Chromaticity (CIE1931) | WY | θH=0°, θV=0°, Normal direction, ILED=25mA | Typ.-0.03 | 0.329 | Typ.+0.03 | - | (2)(6) |
| Color Gamut | CG | θH=0°, θV=0°, Normal direction, ILED=25mA | 68 | 72 | - | % NTSC | (6) |
| Viewing Angle (Horizontal) | θH+, θH- | CR ≥ 10 | 80 | 89 | - | Deg. | (7) |
| Viewing Angle (Vertical) | θV+, θV- | CR ≥ 10 | 80 | 89 | - | Deg. | (7) |
3.6 Interface Pin Assignment (30-Pin Connector)
The module communicates via a 30-pin connector. Refer to the full specification for the complete pin map.
| Pin No. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | RxIN0- | I | Negative LVDS differential data input (Odd data) |
| 3 | RxIN0+ | I | Positive LVDS differential data input (Odd data) |
| 4 | GND | P | Ground |
| 5 | RxIN1- | I | Negative LVDS differential data input (Odd data) |
| 6 | RxIN1+ | I | Positive LVDS differential data input (Odd data) |
| 7 | GND | P | Ground |
| 8 | RxIN2- | I | Negative LVDS differential data input (Odd data) |
| 9 | RxIN2+ | I | Positive LVDS differential data input (Odd data) |
| 10 | GND | P | Ground |
| 11 | RxICLK- | I | Negative LVDS differential clock input (Odd clock) |
| 12 | RxICLK+ | I | Positive LVDS differential clock input (Odd clock) |
| 13 | GND | P | Ground |
| 14 | RxIN3- | I | Negative LVDS differential data input (Odd data) |
| 15 | RxIN3+ | I | Positive LVDS differential data input (Odd data) |
| 16 | GND | P | Ground |
| 17 | RxE0- | I | Negative LVDS differential data input (Even data) |
| 18 | RxE0+ | I | Positive LVDS differential data input (Even data) |
| 19 | GND | P | Ground |
| 20 | RxE1- | I | Negative LVDS differential data input (Even data) |
| 21 | RxE1+ | I | Positive LVDS differential data input (Even data) |
| 22 | GND | P | Ground |
| 23 | RxE2- | I | Negative LVDS differential data input (Even data) |
| 24 | RxE2+ | I | Positive LVDS differential data input (Even data) |
| 25 | GND | P | Ground |
| 26 | RxECLK- | I | Negative LVDS differential clock input (Even clock) |
| 27 | RxECLK+ | I | Positive LVDS differential clock input (Even clock) |
| 28 | GND | P | Ground |
| 29 | RxE3- | I | Negative LVDS differential data input (Even data) |
| 30 | RxE3+ | I | Positive LVDS differential data input (Even data) |
4. Application Guidelines & Critical Notes
- Power Supply: The module requires a stable 12V power supply (LCD_VCC). The input signal voltage range is 0-3.3V. Ensure the power supply is stable and has low ripple.
- Interface: This module uses a standard 2ch-LVDS protocol. The host processor must be configured for this protocol, and the differential signals must be properly terminated with a 100 Ohm resistor.
- Backlight Control: The backlight is controlled via BL_ENABLE (On/Off) and BL_PWM DIM (brightness control) pins. Both accept 3.3V logic levels. A PWM signal within the 0.1-20 KHz range is required for brightness dimming.
- Self-Test Feature: The module includes a BIST (Built-in Self-Test) pin. By pulling this pin high, the LCD will enter a self-test pattern mode, which is useful for validation during integration.
- Operating Temperature: The module operates from 0°C to +50°C. Satisfactory display performance is only guaranteed within this range.
- Storage: Store the module in a clean environment, free from dust, moisture, and direct sunlight. Storage temperature range is -20°C to +60°C.
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD).
5. Conclusion & Design-In Support
The LS156I08-L-V1 from Lesson Smart Display Technology is a 15.6-inch TFT-LCD module with a 2ch-LVDS interface and integrated LED driver. It features FHD resolution, a high color depth of 16.7M (8bit), a wide viewing angle of 89 degrees, and is designed for reliable performance in Public Information Display applications.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the full mechanical drawing and detailed timing parameters.
- Design a clean 12V (LCD_VCC) power supply for the LCD. Configure the host to output a 2-channel LVDS signal.
- Design a backlight driving circuit using the BL_ENABLE (3.3V) and BL_PWM (3.3V, 1KHz typical) signals provided by the host.
- Follow the layout guidelines to ensure a 100 Ohm differential impedance for LVDS signal pairs.
- Contact the manufacturer for evaluation modules, sample requests, and further technical support during the design-in phase.
This module is designed to provide a reliable and vibrant display solution for a wide array of public information and digital signage applications.
