LSC035I19-R-V1 3.5 inch TFT-LCD Module 320×480 16.7M Colors with CTP
1. Executive Summary & Product Positioning
The LSC035I19-R-V1 is a 3.5-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module developed by 立信（万安）智显科技有限公司 (Lesson Smart Display Technology Co., Ltd). The panel size is 3.5 inch and the resolution is 320(RGB)×480, the panel can display up to 16.7M colors. This module is a COG (Chip-on-Glass) + FPC + B/L (Backlight) + CTP (Capacitive Touch Panel) construction, integrating both display and touch functionality in a single compact module.
Product Positioning: This 3.5-inch module with integrated capacitive touch is well-suited for a wide range of interactive applications requiring a compact, high-resolution display with a wide viewing angle. It is ideal for portable instruments, smart home controllers, human-machine interface (HMI) panels, handheld devices, and other embedded display systems.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 3.5-inch diagonal, a-Si TFT active matrix, transmissive, IPS (In-Plane Switching) with free viewing direction. Resolution is 320(RGB) × 480 pixels.
- Driver Circuit: The module integrates the ST7365P driver IC, communicating via an RGB interface.
- Touch Panel (CTP): Integrated capacitive touch panel controlled via an I2C interface (TP_RESET, TP_INT, TP_SCL, TP_SDA).
- Backlight Unit (B/L): A white LED backlight using a dual-chip LED configuration. The typical driving condition is IF=160mA, Vf=6V(TYP).
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L + CTP. The LCM outer dimension is 56.0 × 87.9 × 3.7 mm.
- Interface: The module communicates via a 40-pin FPC connector. The display interface is RGB, with a 3-SPI for touch/control configuration.
- Display Mode: Transmissive, Active Matrix TFT.
- Viewing Direction: Free viewing angle (IPS).
- RoHS: All materials are compliant with RoHS standards.
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 3.5 inches |
| Resolution (Dots) | 320(RGB) × 480 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, IPS |
| Module Construction | COG+FPC+B/L+CTP |
| Color Depth | 16.7M Colors |
| Input Data Interface | RGB |
| Driver IC | ST7365P |
| Module Size (H×V×D) | 56.0 × 87.9 × 3.7 mm |
| Active Area (H×V) | 48.96 × 73.44 mm |
| Display Mode | Active Matrix TFT, Transmissive |
| Viewing Direction | Free (IPS) |
| Backlight Type | Dual-Chip White LED |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Environmental Compliance | RoHS |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage to the device.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1 Note2 |
| Supply voltage | IOVCC | -0.3 | 4.0 | V | Note1 Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1 Note2 |
3.3 Electrical Characteristics
VDDI=1.8V, VDDA=2.8V, AGND=DGND=0V, Ta=25°C
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.4 | 2.8 | 3.3 | V | Note1 |
| Supply voltage (I/O) | IOVCC | 1.65 | 1.8 | 3.3 | V | Note1 |
| Input Voltage L level | VIL | 0 | — | 0.3×IOVCC | V | Note1 |
| Input Voltage H level | VIH | 0.7×VCC | — | IOVCC | V | Note1 |
3.4 Backlight Circuit
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Backlight forward current | IF | 160 | mA |
| Backlight forward voltage | VF | 6.0 | V |
| LED Configuration | — | Dual-Chip LED (双芯灯) | — |
3.5 Electro-Optical Characteristics
Measurement setup: TOPCON, L = 50 cm, field = 1°
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time (Rise+Fall) | Tr+Tf | θx=θy=0° | — | 25 | 35 | ms | Note 1 |
| Contrast Ratio | CR | θx=θy=0° | 800 | 1000 | — | — | Note 2 |
| Transmittance | T% | θx=θy=0° | 3.45 | 4.05 | — | % | Note 3 |
| Color Chromaticity (White) CIE1931 | Wx | θx=θy=0° | — | 0.304 | — | — | Note 4 |
| Color Chromaticity (White) CIE1931 | Wy | θx=θy=0° | — | 0.332 | — | — | Note 4 |
| Viewing Angle (Top) | θT | CR > 10 | 80 | 85 | — | Deg. | Note 1 |
| Viewing Angle (Bottom) | θB | CR > 10 | 80 | 85 | — | Deg. | Note 1 |
| Viewing Angle (Left) | θL | CR > 10 | 80 | 85 | — | Deg. | Note 1 |
| Viewing Angle (Right) | θR | CR > 10 | 80 | 85 | — | Deg. | Note 1 |
Note 1: Viewing angle is the angle at which the contrast ratio is greater than 10. Determined for the horizontal (3,9 o'clock) and vertical (6,12 o'clock) directions with respect to the optical axis normal to the LCD surface.
Note 2: Contrast measurements at viewing angle of Θ=0° and at the center of the LCD surface. CR = Luminance(white) / Luminance(black).
Note 3: Transmittance is the value without APF and without CG (Cover Glass).
Note 4: Color chromaticity coordinates calculated from spectral data with all pixels in red, green, blue and white. Measurements at the center of the panel.
4. Interface & Pin Description
4.1 Pin Description (40-pin FPC Connector)
| Pin No. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | TP_RESET | I | Touch circuit reset pin |
| 3 | TP_INT | I | Touch screen interrupt line |
| 4 | TP_SCL | I | Touch serial interface clock input for I2C interface |
| 5 | TP_SDA | I | Touch serial interface address and data input/output for I2C interface |
| 6 | IOVCC | P | Power supply |
| 7 | VCC | P | Power supply |
| 8 | CS | I | Chip selection pin |
| 9 | SCL | I | In SPI mode, this pin is used as SCL |
| 10 | SDA | I | SPI interface input/output pin |
| 11 | RESET | I | This signal will reset the device and it must be applied to properly initialize the chip |
| 12 | DE | I | Data enable signal for RGB interface operation |
| 13 | DCLK | I | Dot clock signal for RGB interface operation |
| 14 | HS | I | Horizontal synchronizing input signal for RGB interface operation |
| 15 | VS | I | Vertical synchronizing input signal for RGB interface operation |
| 16 | B0 | I | Data bus |
| 17 | B1 | I | Data bus |
| 18 | B2 | I | Data bus |
| 19 | B3 | I | Data bus |
| 20 | B4 | I | Data bus |
| 21 | B5 | I | Data bus |
| 22 | G0 | I | Data bus |
| 23 | G1 | I | Data bus |
| 24 | G2 | I | Data bus |
| 25 | G3 | I | Data bus |
| 26 | G4 | I | Data bus |
| 27 | G5 | I | Data bus |
| 28 | R0 | I | Data bus |
| 29 | R1 | I | Data bus |
| 30 | R2 | I | Data bus |
| 31 | R3 | I | Data bus |
| 32 | R4 | I | Data bus |
| 33 | R5 | I | Data bus |
| 34 | NC | — | No connection |
| 35 | LEDK | P | Power for LED backlight cathode |
| 36 | NC | — | No connection |
| 37 | LEDA | P | Power for LED backlight anode |
| 38 | NC | — | No connection |
| 39 | GND | P | Ground |
| 40 | GND | P | Ground |
5. Mechanical Drawing Reference
The module outline dimension is 56.0 mm (H) × 87.9 mm (V) × 3.7 mm (D). The active area measures 48.96 mm (H) × 73.44 mm (V) with 320(RGB) × 480 dots. The module uses COG (Chip-on-Glass) + FPC + B/L + CTP construction with a 40-pin FPC connector for the RGB interface and I2C touch interface. The backlight and cover glass (盖板) are aligned flush with each other, with the backlight not exceeding the cover glass boundary.
6. Quality & Reliability
The LSC035I19-R-V1 module is manufactured in accordance with rigorous quality standards. Detailed criteria for glass defects, LCD appearance defects (viewing area), polarizer defects, and electrical anomalies are specified in the product specification.
Reliability: The module is designed to operate reliably within a temperature range of -20°C to +70°C and can be stored in temperatures from -30°C to +80°C.
7. Ordering Information & Compliance
Model Number: LSC035I19-R-V1
Revision: 1.0 (New released on 2026-09-02)
RoHS Compliance: This product is fully compliant with RoHS environmental standards, ensuring all materials and manufacturing processes adhere to the restriction of hazardous substances.
Manufacturer: 立信（万安）智显科技有限公司 (Lesson Smart Display Technology Co., Ltd)
