LSC0395I20-R-V1: 3.95-inch TFT LCD Module, 480×480, RGB Interface, 16.7M Colors, Transmissive IPS
Product Subtitle / Keywords
3.95 Inch Display, 480(RGB)×480 Resolution, Transmissive a-Si TFT-LCD Module, COG+FPC+B/L+LENS Module Type, RGB Interface (24-bit), 16.7M Colors, IPS Display Mode (ALL View), Module Size (H×V×D): 84.3 × 99.0 × 2.99 mm, Active Area (H×V): 71.86 × 70.86 mm, Operating Temp: -20°C ~ +70°C, Storage Temp: -30°C ~ +80°C, Backlight: White LED (6 chips, Series), If=40mA, Vf=10.8~13V, Luminance: TBD, Contrast Ratio: 1200 (Typ.), Viewing Angle: 85° (Typ.) ALL, RoHS Compliant, Product Version 1.0
1. Executive Summary And Product Positioning
The LSC0395I20-R-V1 is a 3.95-inch diagonal transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, manufactured by Lesson (Wanan) Smart Display Technology Co., Ltd. This comprehensive module integrates a TFT-LCD panel, a driver circuit, a backlight unit (B/L), and a cover lens (LENS) into a single package. The product specification (Revision 1.0) serves as the definitive technical document for this module.
This module features a resolution of 480(RGB)×480 pixels and is capable of displaying up to 16.7M colors. The module uses an RGB interface. The specifications do not explicitly list the main LCD driver IC, though functional descriptions are provided.
2. Detailed Product Overview And Architecture
The LSC0395I20-R-V1 is a 3.95-inch square TFT display with an integrated lens. Its architecture is built around several key elements:
- Core Technology: Transmissive type a-Si TFT-LCD. The display mode is IPS/Normally Black.
- Module Type: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight) + LENS (Cover Lens).
- Display Format: Graphic 480(RGB)×480 Dot-matrix (square).
- Display Characteristics: Capable of displaying up to 16.7M colors.
- Interface Type: RGB interface. The pinout includes PCLK, HS, VS, DE, and 16 data lines (R0~R4, G0~G5, B0~B4).
- Main LCD Driver IC: ST7102
- Backlight Unit: The module utilizes a white LED backlight comprised of 6 chips in series (6 Chip-White LED Series). The circuit diagram shows a 6-series configuration. The document specifies a driving condition of IF=40mA and Vf=10.8~13V.
- View Direction: IPS (ALL View, 85° Typ.).
- Module Luminance: TBD (To Be Determined).
- Contrast Ratio: 1200:1 (Typ.).
- Approval Status: Approved Product Specification only (Revision 1.0).
3. Technical Specifications
3.1 General & Mechanical Specification
| Parameter | Specification | Unit |
|---|---|---|
| Panel Size | 3.95'' (Diagonal) | Inch |
| Module Outline (H×V×D) | 84.3 × 99.0 × 2.99 | mm |
| Active Area (H×V) | 71.86 × 70.86 | mm |
| Number of Dots | 480(RGB) × 480 | pixels |
| Display Type | a-Si TFT, Transmissive, IPS, Normally Black | - |
| Display Colors | 16.7M | colors |
| Module Type | COG+FPC+B/L+LENS | - |
| Display Mode | IPS (Normally Black) | - |
| View Direction (Best Image) | IPS (ALL View) | - |
| Luminance (Typ.) | TBD | cd/m² |
| Contrast Ratio (Typ.) | 1200 | - |
| Interface | RGB | - |
| Backlight Type | White LED (6 chips in series) | - |
3.2 Absolute Maximum Ratings
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | IOVCC | -0.3 | +3.6 | V | |
| Supply voltage | VCC | -0.3 | +3.3 | V | |
| Operating temperature | TOPR | -20 | 70 | °C | |
| Storage temperature | TSTR | -30 | 80 | °C |
3.3 Electrical Characteristics
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | IOVCC | -- | 1.8 | 3.3 | V | |
| Supply voltage | VCC | -- | 3.3 | -- | V | |
| Input Voltage (L level) | VIL | GND | --- | 0.3*IOVCC | V | |
| Input Voltage (H level) | VIH | 0.7*IOVCC | --- | IOVCC | V |
3.4 Backlight Driving Conditions
The module uses a white LED backlight comprised of 6 chips connected in series (6 Chip-White LED Series). The circuit diagram shows all 6 LEDs in series. The driving condition is: IF=40mA, VF=10.8~13V.
| Parameter | Symbol | Condition | Min. | Max. | Unit |
|---|---|---|---|---|---|
| Backlight Forward Voltage | VF | IF=40mA | 10.8 | 13 | V |
| Backlight Forward Current | IF | - | - | 40 | mA |
3.5 Interface Connection (FPC, 40 pins)
The module uses a 40-pin FPC connector. The pinout is as follows:
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDA | P | Power for LED backlight anode |
| 2, 3 | LEDK | P | Power for LED backlight cathode |
| 4 | VCI | P | power supply |
| 5 | IOVCC | P | power supply |
| 6 | RESET | I | Reset pin. |
| 7 | TE | O | Tearing effect output pin to synchronies MCU to frame writing, activated by S/W command. |
| 8 | PWM | O | LCD backlight control PWM output pin |
| 9 | GND | P | Ground |
| 10 | DE | I | Data enable signal in RGB interface. |
| 11 | PCLK | I | clock signal in RGB interface. (DOTCLK) |
| 12 | HS | I | Horizontal (Line) synchronizing input signal in RGB interface. |
| 13 | VS | I | Vertical (Frame) synchronizing input signal in RGB interface |
| 14 | GND | P | Ground |
| 15 | CS | I | Chip select pin |
| 16 | SCL | I | CLK Pin |
| 17 | SDA | I | SPI input data Pin. |
| 18-22 | R0-R4 | I | Red data bus (5-bit) |
| 23-28 | G0-G5 | I | Green data bus (6-bit) |
| 29-33 | B0-B4 | I | Blue data bus (5-bit) |
| 34 | GND | P | Ground |
| 35 | TP_INT | I | Touch screen interrupt line. Interrupt active when the line is low. |
| 36 | TP_SDA | I | Touch Serial interface address and data input/output for I2C interface |
| 37 | TP_SCL | I | Touch Serial interface clock input for I2C interface. |
| 38 | TP_RESET | I | Touch circuit reset pin |
| 39 | TP_VCC / NC | - | NC |
| 40 | GND | P | Ground |
Note: Despite the presence of touch panel pins (TP_INT, TP_SDA, TP_SCL, TP_RESET), the module is specified as COG+FPC+B/L+LENS. Pin 39 is marked as NC.
3.6 Electro-Optical Characteristics
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Viewing Angle (Horizontal) | θ3, θ9 | CR > 10 | 80 | 85 | - | Deg. | Note 1 |
| Viewing Angle (Vertical) | θ12, θ6 | CR > 10 | 80 | 85 | - | Deg. | Note 1 |
| Contrast Ratio | CR | Θ = 0° | 900 | 1200 | - | - | Note 2 |
Notes:
1. Viewing angle is the angle at which the contrast ratio is greater than 10. The viewing angles are determined for the horizontal or 3, 9 o'clock direction and the vertical or 6, 12 o'clock direction with respect to the optical axis which is normal to the LCD surface.
2. Contrast measurements shall be made at viewing angle of Θ=0 and at the center of the LCD surface. Luminance shall be measured with all pixels in the view field set first to white, then to the dark (black) state.
3.7 Reset Timing Characteristics
| Parameter | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|
| Reset low width | Trst_width | TBD | - | ms |
| Reset time | Trst_time | TBD | - | ms |
Note: During the reset period, the display will be blanked, then return to default condition for IC initialization.
4. Application Scenario (Based on Spec)
Based on the product specification, this module is a standard 3.95-inch square TFT display suitable for general embedded applications requiring a color display with an RGB interface and a square aspect ratio, such as smart home displays and industrial control panels.
5. Handling Precautions And Compliance
The module is compliant with the RoHS directive. The document also includes specific mechanical design guidelines: case visual area should be smaller than VAmds by more than 0.3mm per side; foam opening should be larger than VAmds by more than 0.6mm per side; and the TP edge should not contact any metal conductor.
