LS101I25-L-V1: 10.1-Inch Color TFT LCD Module, WSVGA Resolution (1024×600), LVDS Interface, High Brightness 500 cd/m², Free Viewing Direction
Product Subtitle / Keywords
10.1 Inch Display, 1024(RGB)×600 WSVGA Resolution, Color Active Matrix TFT TN LCD, Amorphous Silicon TFT, LVDS Interface, COG+FPC+B/L Module Type, Normally Black Display Mode, RGB Vertical Stripe, High Brightness 500 cd/m² (TYP), Contrast Ratio 600:1 (TYP), Hard Coating Surface, Free Viewing Direction, White LED Backlight, Operating Temp -20~70°C, Storage Temp -30~80°C, 40-Pin Interface, Lesson Smart Display Technology Co., Ltd
1. Executive Summary & Product Positioning
The LS101I25-L-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 10.1-inch color active matrix thin film transistor (TFT) TN (Twisted Nematic) liquid crystal display (LCD) module that uses amorphous silicon TFT as a switching device. It is composed of a TFT LCD panel, Driver IC, FPC and Backlight.
This product specification (Revision 1.0) serves as the definitive technical document, defining the module's general description (including a 10.1-inch diagonal display with WSVGA resolution of 1024 vertical by 600 horizontal pixel array), features (display mode, resolution, viewing direction, interface), absolute maximum ratings, electrical characteristics (DC characteristics, current consumption), power on/off sequence, backlight specifications, optical characteristics (response time, viewing angle, contrast), and reliability/ESD test conditions.
The document provides the core parameters necessary for system integration into standard 10.1-inch industrial and commercial display applications. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications (especially the power supply voltage and power sequence), backlight drive conditions, and mechanical tolerances described herein to ensure reliable performance and compatibility.
2. Detailed Product Overview & Architecture
- Core Technology: Color active matrix thin film transistor (TFT) TN liquid crystal display (LCD) module, using amorphous silicon TFT as a switching device.
- Display Mode: Transmissive type, Normally Black TN (Twisted Nematic).
- Display Resolution: WSVGA: 1024 vertical by 600 horizontal pixel array (1024RGB(H) × 600(V) pixels).
- Pixel Arrangement: RGB Vertical Stripe format.
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight).
- Interface Type: LVDS (Low-Voltage Differential Signaling) interface.
- Display Colors: Capable of displaying a wide range of colors (the specific number of colors is not listed in the features table, but implied by the 8-bit LVDS interface).
- Backlight: White LED backlight providing high brightness (Typ. 500 cd/m²).
- Surface Treatment: Hard Coating for increased durability and scratch resistance.
- Viewing Direction: "Free" — optimized for all directions (Full Viewing Angle).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Module Model | LS101I25-L-V1 | - |
| LCD Size (Diagonal) | 10.1 | inch |
| Number of Pixels | 1024RGB(H) × 600(V) (WSVGA) | Pixels |
| Active Area | 222.72 (W) × 125.28 (H) | mm |
| Pixel Pitch | 0.2175 (H) × 0.2088 (H) | mm |
| Outline Dimension | 235.0 × 143.0 × 2.90 (Typ.) | mm |
| Display Mode | Normally Black | - |
| Viewing Direction | Free | - |
| Display Format | RGB vertical stripe | - |
| Luminance (TYP) | 500 | cd/m² (nit) |
| Contrast Ratio (TYP) | 600 : 1 | - |
| Surface Treatment | Hard Coating | - |
| Interface | LVDS | - |
| Backlight | White LED | - |
| Module Type | COG+FPC+B/L | - |
| 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 | Revision 1.0 / Published 2015-12-15 | - |
3.2 Electrical & Interface Specifications
3.2.1 Absolute Maximum Ratings
| Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|
| LC Operating Voltage | VOP | - | 4.5 | V |
| Operating Temperature | TOP | -20 | 70 | °C |
| Storage Temperature | TST | -30 | 80 | °C |
| Operating Ambient Humidity | HOP | 10 | *4 | %RH |
| Storage Humidity | HST | 10 | *4 | %RH |
Note: "*4" indicates the maximum humidity depends on the temperature per the document's conditions.
3.2.2 Pin Description (40-pin FPC Connector - LVDS Interface)
The module uses a 40-pin FPC connector for the LVDS interface and power. Key signals include:
| PIN | SYMBOL | I/O | Function |
|---|---|---|---|
| 1, 2, 3, 4 | VDD | P | Power Supply (Digital/Analog) |
| 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 | GND | P | Ground |
| 15, 16 | NC | N | No connection |
| 17, 18, 19, 20, 21, 22, 23 | RXIN0- / +, RXIN1- / +, RXIN2- / +, RXCLKIN- / + | I | LVDS differential data/clock input (Lanes 0,1,2 and Clock) |
| 24 | NC | N | No connection |
| 25 | GND | P | Ground |
| 26, 27 | NC | N | No connection |
| 28 | SELB | I | 6bit/8bit mode select: High=6bit, Low=8bit |
| 29 | AVDD | P | Power for Analog Circuit |
| 30 | GND | P | Ground |
| 31, 32 | LED- | P | LED Cathode (Backlight -) |
| 33 | L/R | I | Horizontal inversion (0=right->left, 1=left->right) |
| 34 | U/D | I | Vertical inversion (0=top->bottom, 1=bottom->top) |
| 35 | VGL | P | Gate OFF Voltage |
| 36, 37 | NC | N | No connection |
| 38 | VGH | P | Gate ON Voltage |
| 39, 40 | LED+ | P | LED Anode (Backlight +) |
Note: The specification includes a full 40-pin definition. Pin types: I = Input, O = Output, P = Power.
3.2.3 Power-On/Off Timing Sequence
The specification provides a detailed timing diagram and values for the power-on/off sequence. Key timing parameters include:
- T1: Time from VDD to signal start (T1 > 0ms)
- T2: Time from signal start to AVDD on (T2 > 0ms)
- T3: Time from AVDD on to VGH on (T3 > 10ms)
- T4: Time from VGH on to VGL on (T4 > 0ms)
- T5: Time from VDD power on to backlight on (T5 > 20ms)
- T6: Time from backlight off to VDD power off (T6 > 0ms)
- T7: Time from GND to next power-on (T7 > 1s)
- T8: VDD rising time (T8 < 20ms)
For the power-off sequence, the timing is essentially the reverse order. Strict adherence to the power sequence diagram is required to prevent device damage.
3.2.4 Backlight Specifications
The backlight uses a White LED configuration.
| Parameter | Condition | Value | Unit |
|---|---|---|---|
| Backlight Type | - | White LED | - |
| Luminance (Panel) | Typical | 500 | cd/m² |
Note: The backlight driver is external. The pins LED+ (39, 40) and LED- (31, 32) provide direct connections to the LED strings inside the module.
3.3 Optical & ESD Specifications
3.3.1 Optical Characteristics
The specification defines the optical characteristics, including:
- Contrast Ratio: 600 (TYP).
- Luminance: 500 cd/m² (TYP).
- Response Time (TR+TF): Defined as the sum of rise time (TR) and fall time (TF). The specific typical values are shown in a diagram in the specification.
- Viewing Angle: "Free" direction, implying a wide, symmetrical viewing angle.
3.3.2 ESD Ratings
| Test Item | Conditions | Note |
|---|---|---|
| Contact & Air Discharge | 150pF, 330Ω, ±8kV & ±15kV | 1 |
| Contact Test | 200pF, 0Ω, ±200V | 2 |
4. Application Guidelines & Critical Notes
Intended Use
- Standard 10.1-inch industrial and commercial display applications.
- Applications requiring a WSVGA (1024×600) resolution display with an LVDS interface.
- Systems requiring a Normally Black TN display with high brightness (500 cd/m²) and Hard Coating surface treatment.
Critical Design Considerations
- LVDS Interface with 6/8-bit Selectable Color: The module uses an LVDS interface. The SELB pin (pin 28) controls the color depth: SELB = High for 6-bit (262k colors), SELB = Low for 8-bit (16.7M colors). The host LVDS transmitter must be configured for the selected mode.
- Multi-Voltage Power Supply Requirements: The module requires several external voltages: VDD (Digital, pins 1-4), AVDD (Analog, pin 29), VGH (Gate On, pin 38), and VGL (Gate Off, pin 35). These must be generated by an external PMIC or DC-DC converter.
- Critical Power Sequencing: Strictly follow the Power-On/Off timing sequence defined in the specification (T1 through T8). Incorrect sequencing can lead to latch-up and permanent damage to the driver IC. The backlight should only be enabled after T5 (>20ms after VDD is stable).
- External Backlight Driver Needed: The module provides direct access to the LED strings via the LED+ and LED- pins. The module does not contain an integrated backlight driver. An external constant-current LED driver IC must be used.
- Display Orientation Control (L/R and U/D): Pins 33 (L/R) and 34 (U/D) allow the host system to control the display scan direction:
- L/R=0: Right-to-left scan; L/R=1: Left-to-right scan.
- U/D=0: Top-to-bottom scan; U/D=1: Bottom-to-top scan.
- Free Viewing Direction: The "Free" viewing direction specification (similar to a wide viewing angle panel) means the display is optimized for viewing from any direction, offering a significant advantage over standard TN panels with a defined 6 or 12 o'clock direction.
- High Brightness (500 cd/m²): The high luminance is suitable for medium-to-high ambient light environments but requires an adequate external LED driver.
- Hard Coating Surface: The Hard Coating provides improved scratch resistance compared to standard untreated surfaces.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly. The module is tested to ±8kV (Contact) and ±15kV (Air).
- 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.
- Do not attempt to disassemble or modify the LCD module.
- All NC (No Connection) pins should be left open.
- If the logic circuit power is off, do not apply input signals to avoid latch-up.
5. Conclusion & Design-In Support
The LS101I25-L-V1 specification details a standard 10.1-inch WSVGA TFT display module with an LVDS interface, high brightness (500 cd/m²), a "Free" viewing direction, and a Hard Coating surface — a reliable choice for industrial and commercial applications requiring a clear, durable display.
Key Strengths
- High Brightness (500 cd/m²): Excellent for well-lit environments.
- Free Viewing Direction: Broad viewing angle suitable for public-facing or multi-user displays.
- Hard Coating: Adds surface durability and scratch resistance for touch-intensive applications.
- Standard LVDS Interface: Easy to integrate with most embedded processors.
- 6/8-bit Selectable Color: Provides flexibility between interface simplicity (6-bit) and color accuracy (8-bit).
Main Design Focus
- The critical design tasks are generating the multi-rail power supply (VDD, AVDD, VGH, VGL) with the correct power-on/off sequencing and designing an external constant-current LED backlight driver.
- Supporting requirements: Configure the host LVDS transmitter for WSVGA (1024×600) resolution. Correctly set the SELB pin (pin 28) for the desired color depth (6-bit or 8-bit). Account for display orientation using L/R and U/D pins if needed.
This module is a solid choice for engineers needing a robust, high-performance, 10.1-inch display with a wide viewing angle and durable surface treatment.
