LS101I39-L-V1: 10.1-Inch TFT LCD Module, WXGA Resolution (1280×800), LVDS Interface, Built-in Backlight Driver, Wide Temperature Operation
Product Subtitle / Keywords
10.1 Inch LCD Display, 1280(RGB)×800 WXGA Resolution, Transmissive a-Si TFT-LCD Module, 16.7M Colors, COG+FPC+B/L Module Type, LVDS Interface, 40-Pin Connector, Supply Voltage VDDIN(3.3V), Backlight: 5串8并 (5S8P), Backlight Current IF=160mA, Backlight Voltage VF=15-16V, Operating Temperature 0 to 50°C, Storage Temperature -30°C to 80°C, Lesson Smart Display Technology Co., Ltd
1. Executive Summary & Product Positioning
The LS101I39-L-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module. It is composed of a TFT-LCD panel, a driver circuit and a backlight unit.
This product specification (Revision 1.0, dated 2025-08-08) serves as the definitive technical document, defining the module's general description (including a 10.1-inch diagonal display with WXGA resolution of 1280(RGB)*800), physical features (mechanical drawing, pin description), absolute maximum ratings and electrical characteristics (power supply, DC characteristics, backlight circuit, power sequence), optical characteristics (response time, contrast ratio, cross modulation test), and reliability test conditions.
The document provides the core parameters necessary for system integration into standard 10.1-inch industrial, commercial, and embedded display applications. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications (especially the power supply voltage VDDIN=3.3V, the backlight driving conditions and the critical power-on/off timing sequence) described herein to ensure reliable performance and compatibility.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit.
- Display Resolution: WXGA: 1280(RGB)*800 pixel array.
- Display Colors: This panel can display up to 16.7 M colors.
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight).
- Interface Type: LVDS (Low-Voltage Differential Signaling) interface, using differential data pairs (RIN0 to RIN3) and a differential clock pair (LVDS-CLK).
- Backlight: White LED backlight configured as 5串8并 (5S8P) (5 Series, 8 Parallel = 40 LEDs), with a total forward voltage of 15-16V and a total forward current of 160mA. The module includes a built-in LED driver circuit, controlled by an external PWM signal (LED_PWM) and enable signal (LED_EN).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Module Model | LS101I39-L-V1 | - |
| LCD Size (Diagonal) | 10.1 | inch |
| Resolution | 1280(RGB) × 800 (WXGA) | Pixels |
| Active Area (AA) | 216.91 (H) × 135.60 (V) (Approx., from drawing) | mm |
| Module Outline (LCM OD) | 229.30 (W) × 140.00 (H) × 4.50 (D) (Approx., from drawing) | mm |
| Display Colors | 16.7M | - |
| Module Type | COG+FPC+B/L | - |
| Backlight Type | White LED (5串8并 / 5S8P) | - |
| Backlight Voltage (Vf) | 15.0 ~ 16.0 (Typ) | V |
| Backlight Current (If) | 160 | mA |
| Operating Temperature | -20 ~ +70 | °C |
| Storage Temperature | -30 ~ +80 | °C |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co.,Ltd) | - |
| Document Revision / Date | Revision 1.0 / 2025-08-08 | - |
3.2 Interface & Electrical Specifications
3.2.1 Pin Description (40-Pin LVDS Connector)
The module uses a 40-pin FPC connector for the LVDS interface, power and backlight control. Key signals include:
| Pin No. | Symbol | Type | Function |
|---|---|---|---|
| 1, 7, 23 | NC | - | Non Connection (Leave open) |
| 2, 3 | VDDIN | P | Power supply: 3.3V (Typ.) |
| 8 | RIN0- | I | LVDS Negative data signal (Lane 0) |
| 9 | RIN0+ | I | LVDS Positive data signal (Lane 0) |
| 11 | RIN1- | I | LVDS Negative data signal (Lane 1) |
| 12 | RIN1+ | I | LVDS Positive data signal (Lane 1) |
| 14 | RIN2- | I | LVDS Negative data signal (Lane 2) |
| 15 | RIN2+ | I | LVDS Positive data signal (Lane 2) |
| 17 | LVDS-CLK N | I | LVDS Negative clock signal |
| 18 | LVDS-CLK P | I | LVDS Positive clock signal |
| 21 | RIN3+ | I | LVDS Positive data signal (Lane 3) |
| 31, 32, 33 | LED- | P | LED Cathode (Backlight —) |
| 35 | LED_PWM | I | Backlight PWM dimming input |
| 36 | LED_EN | I | Backlight Enable Signal |
| 38, 39 | LED+ | P | LED Anode (Backlight +) |
| 10, 13, 16, 19, 22, 25, 28 | GND | P | Ground |
Note: The above table includes key pins. Pins 4-7, 20, 23-24, 26-27, 29-30, 33-34, 37, 40 are also defined (NC or GND) in the full specification. Pin types: P = Power, I = Input.
3.2.2 Power Supply Sequence (Critical)
The specification provides a detailed timing diagram and values for the power-on/off sequence. Key timing parameters include:
| Parameter | Min. | Typ | Max. | Unit |
|---|---|---|---|---|
| T1 (VDD rise to Signal valid) | 0 | - | 10 | ms |
| T2 (Signal valid to Backlight on) | 0 | - | 50 | ms |
| T3 (Backlight off to GND) | 200 | - | - | ms |
| T4 (VDD off to next power on) | 500 | - | - | ms |
| T5 (Signal valid to Backlight off) | 0 | - | 50 | ms |
| T6 (Backlight off to Signal invalid) | 0 | - | 10 | ms |
| T7 (Signal invalid to VDD off) | 500 | - | - | ms |
Note: The power-on sequence is: Power Supply (VDD) → Interface Signal (LVDS) → Backlight (via LED_EN). The power-off sequence is the reverse. Strict adherence to these timings is required to prevent damage to the module. The backlight must not be enabled before T2 is satisfied.
3.2.3 Backlight Circuit & Control
The backlight system uses a 5串8并 (5S8P) White LED configuration, totaling 40 LEDs. The module includes an internal LED driver which is controlled via external signals.
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Supply Voltage for Driver | VLED | 5.0 ~ 12.0 (Typ) | V |
| Forward Voltage (LED Strings) | Vf | 15.0 ~ 16.0 (Typ) | V |
| Forward Current (Total) | If | 160 | mA |
Note: The module's internal LED driver requires a power supply on VLED (Pins 20 in diagram, ~5-12V). The backlight brightness is controlled via the LED_PWM pin (Pin 35) and enabled via the LED_EN pin (Pin 36).
3.3 Optical Characteristics
The specification defines the electro-optical characteristics, including:
- Contrast Ratio (CR): Defined mathematically as the ratio of luminance when displaying a white raster to luminance when displaying a black raster. The viewing angle is defined as the angle at which CR is greater than 10.
- Response Time (Tr, Td): The electro-optical response time measurements are made by switching the “data” input signal ON and OFF. The times needed for the luminance to change from 10% to 90% is Tr (Rise Time), and from 90% to 10% is Td (Decay Time).
- Cross Modulation / Crosstalk: Defined as the luminance change in a center area (YA) when a white bar or black bar pattern is displayed on the sides. Calculated as: White Bar Cross-Talk(%) = ((YB-YA)/YA) x 100; Black Bar Cross-Talk(%) = ((YC-YA)/YA) x 100. The location measured is exactly the same in both patterns.
4. Application Guidelines & Critical Notes
Intended Use
- Standard 10.1-inch industrial, commercial, and embedded display applications.
- Applications requiring a WXGA (1280×800) resolution display with a standard LVDS interface.
- Systems requiring a wide operating temperature range (-20°C to +70°C).
Critical Design Considerations
- Power Supply (VDDIN = 3.3V): The module requires a stable 3.3V power supply (VDDIN) on pins 2 and 3. The power sequence must be strictly followed: VDDIN must be applied before the LVDS signals and backlight.
- Critical Power-On/Off Sequencing: The power-on sequence must adhere to T1 through T7 timings. Incorrect sequencing can cause latch-up and permanent damage. Do not apply LVDS signals or backlight power before VDDIN is stable.
- Backlight Driver: Internal with External Control: The module contains an internal LED driver that is powered by VLED (5-12V). Brightness is controlled by an external PWM signal on the LED_PWM pin (Pin 35). The backlight is enabled/disabled by the LED_EN pin (Pin 36). This simplifies external design by requiring only a PWM source from the host.
- Backlight Forward Voltage (15-16V) & Total Current (160mA): The internal driver must generate a high voltage to drive the 5S8P string configuration. The VLED supply (5-12V) is boosted internally. The total forward current is set by the driver to 160mA across the 8 parallel channels.
- LVDS Interface with 4 Lanes: The module uses 4 LVDS data lanes (RIN0 to RIN3) plus a clock lane, supporting 8-bit (16.7M) color depth natively. The host LVDS transmitter must be configured for 4-lane, 8-bit mode at WXGA resolution.
- Mechanical Tolerances: The mechanical drawing specifies tight tolerances: ±0.20mm for overall dimensions and ±0.20mm for the segments to the edge of glass. Ensure the mounting frame accommodates these tolerances.
- ESD Protection: The module is sensitive to ESD (Electro Static Discharge). Standard ESD precautions during handling and assembly are required.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass and a precision FPC – handle with care.
- Avoid bending the FPC sharply, especially near the connector interface or glass edge. The drawing shows a specific FPC bend area that must be respected.
- Do not attempt to disassemble or modify the LCD module.
- All NC (No Connection) pins should be left open to avoid interference.
- ROHS Compliance is indicated in the notes of the mechanical drawing.
5. Conclusion & Design-In Support
The LS101I39-L-V1 specification details a standard 10.1-inch WXGA (1280×800) TFT LCD module with a built-in LED backlight driver, LVDS interface, and a wide operating temperature range — an excellent choice for a wide variety of industrial and embedded display applications.
Key Strengths
- Built-In Backlight Driver: Simplifies system design; requires only a PWM input and a moderate VLED supply (5-12V) instead of a high-voltage external driver.
- Standard LVDS Interface with 4 Lanes: Easy to integrate with most embedded processors and FPGAs.
- WXGA Resolution (1280×800): A standard 16:10 aspect ratio, ideal for productivity and media applications.
- Wide Operating Temperature (-20°C to +70°C): Suitable for industrial environments.
- Clear Power-On/Off Sequencing: Well-defined timing parameters for reliable system startup.
Main Design Focus
- The critical design tasks are correctly implementing the power sequencing (VDDIN → LVDS Signals → Backlight) and providing the VLED supply (5-12V) and a PWM source for the built-in backlight driver.
- Supporting requirements: Configure the host's LVDS transmitter for 4-lane, 8-bit, WXGA (1280×800) resolution. Generate a PWM signal on the LED_PWM pin for brightness control (dimming). Provide a stable 3.3V for VDDIN.
This module is a solid choice for engineers designing industrial or commercial systems using a standard 10.1-inch display with an LVDS interface and simplified backlight design.
