LSC043I08-R-V1: 4.3-Inch IPS TFT LCD Module, 480×800 Resolution, RGB Interface, 350 cd/m² Brightness, 1000:1 Contrast Ratio, Full Viewing Angle (IPS)
Product Subtitle / Keywords
4.3 Inch Display, 480(RGB)×800 Resolution, a-Si TFT-LCD Module, Transmissive, COG+FPC+B/L+CTP Module Type, ST7701SN Driver IC, 8 Chip-White LEDs Backlight, 350 cd/m² Luminance, 1000:1 Contrast Ratio, IPS (All O'Clock View Direction), 25ms Response Time, Operating Temperature -20°C to +70°C, Storage Temperature -30°C to +80°C, RGB Interface, Supply Voltage IOVCC=1.8V (Typ), VCC=2.8V (Typ), RoHS Compliant, Product Spec Revision 1.0, Lesson Smart Display Technology Co., Ltd.
1. Executive Summary & Product Positioning
The LSC043I08-R-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, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit. The panel size is 4.3 inch and the resolution is 480(RGB)*800, the panel can display up to 16.7 M colors.
This product specification (Revision 1.0) serves as the definitive technical document, defining the module's general description, physical features (including module size, number of dots, active area, and surface hardness), mechanical specification, outline dimension (including detailed mechanical drawing, environmental parameters, and driving conditions), absolute maximum ratings, electrical characteristics (including recommended operating conditions for power supplies and logic levels), module function description (including block diagram, pin description for the 51-pin interface, and timing characteristics for serial and RGB interfaces), electro-optical characteristics (including response time, contrast ratio, luminance, viewing angles, and chromaticity), and inspection standards (AQL, glass defect, and FPC defect criteria).
The document provides the core parameters necessary for system integration into standard 4.3-inch portrait-oriented display applications. The unequivocal recommendation for engineers is to strictly adhere to the mechanical and electrical specifications 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. The panel can display up to 16.7 M colors.
- Display Resolution: WVGA: 480(RGB)×800 pixel array.
- Display Mode: Transmissive, Normally White IPS (In-Plane Switching), providing wide viewing angles (all o'clock direction).
- Module Construction: COG+FPC+B/L+CTP (Chip-On-Glass + Flexible Printed Circuit + Backlight + Capacitive Touch Panel).
- Interface Type: The module supports multiple interface options as determined by the ST7701SN driver IC, including a 24-bit RGB Interface (with 8-bit per color data bus for R, G, B), and a 3-line Serial Interface (SPI) for control commands. The pin description confirms the presence of a full 24-bit parallel data bus (R0-R7, G0-G7, B0-B7) along with DE, HS, VS, DCLK signals for the RGB interface, and SDI, SCL, CS, SDO pins for the SPI interface.
- Power Architecture: Requires dual power supplies: VCC (2.8V Typ for the core/logic) and IOVCC (1.8V Typ for the I/O interface). The backlight is powered separately through dedicated LED+ and LED- pins.
- Backlight: White LED backlight consisting of 8 chip-white LEDs. The driving condition is specified as IF=20mA, Vf=24V (TYP). This suggests a configuration of 8 LEDs in series, requiring a constant current driver of 20mA at around 24V.
- Touch Panel: The module includes a Capacitive Touch Panel (CTP) with a GFF (Glass-Film-Film) structure and a surface hardness greater than 6H.
- Supplier: 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Item | Specification | Unit |
|---|---|---|
| Model | LSC043I08-R-V1 | - |
| LCD Size (Diagonal) | 4.3 | inch |
| Resolution | 480(RGB) × 800 | pixels |
| Module size (H×V×D) | 63.96 × 105.73 × 3.42 | mm |
| Active area (H×V) | 56.16 × 93.6 | mm |
| Number of dots | 480(RGB) × 800 | pixel |
| Display Type | 4.3 TFT (TRANSMISSIVE/NORMAL WHITE) | - |
| LCD Driver IC | ST7701SN | - |
| Backlight | 8 CHIP-WHITE LEDS | - |
| LCD View Direction | ALL O'CLOCK (IPS) | - |
| Module Type | COG+FPC+B/L+CTP | - |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd) | - |
3.2 Interface & Electrical Specifications
3.2.1 Absolute Maximum Ratings (From Section 5)
| Item | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 3.6 | V |
| Supply voltage | IOVCC | -0.3 | 3.6 | V |
| Operating temperature | TOPR | -20 | 70 | °C |
| Storage temperature | TSTR | -30 | 80 | °C |
3.2.2 Recommended Operating Conditions (DC Characteristics, From Section 6)
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage (Core/Analog) | VCC | 2.5 | 2.8 | 3.6 | V |
| Supply voltage (I/O) | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input Voltage 'L' level | VIL | VSS | --- | 0.3×IOVCC | V |
| Input Voltage 'H' level | VIH | 0.7×IOVCC | --- | IOVCC | V |
3.2.3 Pin Description (From Section 7-2, 51-Pin Interface)
The module uses a 51-pin FPC connector. Key signals include:
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1, 4, 7, 11, 13, 38, 44, 51 | GND | P | Ground |
| 2 | LED- | P | Power for LED backlight cathode |
| 3 | LED+ | P | Power for LED backlight anode |
| 5 | LCD_ID | I | ID |
| 6 | CABC | O | The PWM frequency output for LCD driver control. |
| 8 | SDO | O | Serial data output pin used for the SPI Interface. |
| 9 | SDI | I | SDA: Serial data input pin for SPI Interface. |
| 10 | SCL | I | SCL: Serial clock input for SPI interface. |
| 12 | CS | I | Chip select signal (Low: selected, High: not selected) |
| 14-21 | R0-R7 | I | Red data bus (Parallel data bus for RGB interface) |
| 22-29 | G0-G7 | I | Green data bus (Parallel data bus for RGB interface) |
| 30-37 | B0-B7 | I | Blue data bus (Parallel data bus for RGB interface) |
| 39 | DE | I | Data enable signal for RGB interface operation |
| 40 | HS | I | Line synchronizing signal for RGB interface operation |
| 41 | VS | I | Frame synchronizing signal for RGB interface operation |
| 42 | DCLK | I | Dot clock signal for RGB interface operation |
| 43 | RESET | I | The external reset input |
| 45 | VCI | P | Power Supply |
| 46 | IOVCC | P | Power Supply |
| 47-50 | YD, XR, YU, XL | NC | No Connection (NC) - Reserved for Touch Panel |
3.3 Timing Characteristics (From Section 7.5)
3.3.1 Serial Interface Timing (3-line SPI) - Table 4
Conditions: VDDI=1.8, VDD=2.8, AGND=DGND=0V, Ta=25°C
| Signal | Symbol | Parameter | Min | Max | Unit |
|---|---|---|---|---|---|
| CSX | T_CSS | Chip select setup time (write) | 15 | - | ns |
| SCL | T_SCYCW | Serial clock cycle (Write) | 66 | - | ns |
| SDA(DIN) | T_SDS | Data setup time | 10 | - | ns |
| SDA(DIN) | T_SDH | Data hold time | 10 | - | ns |
3.3.2 RGB Interface Timing - Table (Section 7.5.3)
Conditions: VDDI=1.8, VDD=2.8, AGND=DGND=0V, Ta=25°C
| Signal | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| HSYNC, VSYNC | T_SYNCS | VSYNC, HSYNC Setup Time | 5 | - | ns |
| ENABLE | T_ENS | Enable Setup Time | 5 | - | ns |
| ENABLE | T_ENH | Enable Hold Time | 5 | - | ns |
| DOTCLK | PWDH | DOTCLK High-level Pulse Width | 15 | - | ns |
| DOTCLK | T_CYCD | DOTCLK Cycle Time | 33 | - | ns |
| DB | T_FDS | PD Data Setup Time | 5 | - | ns |
| DB | T_PDH | PD Data Hold Time | 5 | - | ns |
Note on DOTCLK: The minimum DOTCLK cycle time is 33ns, which corresponds to a maximum pixel clock frequency of approximately 30.3 MHz. For a resolution of 480x800 at 60Hz, the required pixel clock is approximately 480 x (Horizontal Blanking) x 60. With a typical blanking, this is well within the 30MHz limit.
3.3.3 Reset Timing - Table 9
| Related Pins | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| RESX | TRW | Reset pulse duration | 10 | - | us |
| RESX | TRT | Reset cancel (from NVM load) | - | 5 (Note 1) | ms |
Note: The reset cancel includes required time for loading ID bytes, VCOM setting and other settings from NVM to registers. This loading is done every time when there is HW reset cancel time (tRT) within 5 ms after a rising edge of RESX.
3.4 Backlight Driving Conditions
The backlight circuit is specified with the driving condition: IF=20mA, Vf=24V (TYP). This indicates 8 LEDs in series, requiring a boost-type constant current LED driver capable of delivering 20mA at approximately 24V. The total backlight power is 20mA × 24V = 480mW.
3.5 Electro-Optical Characteristics (From Section 8)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Response time | Tr+Tf | θx=θy=0 | - | 25 | 35 | ms |
| Contrast Ratio | CR | θx=θy=0 | 700 | 1000 | - | - |
| Transmittance | T% | θx=θy=0 | - | 6.0 | - | % |
| Color Chromaticity (White) CIE1931 | Wx | θx=θy=0 | - | 0.304 | - | - |
| Color Chromaticity (White) CIE1931 | Wy | θx=θy=0 | - | 0.345 | - | - |
| Viewing angle (Top) | θT | CR > 10 | 70 | 80 | - | Deg. |
| Viewing angle (Bottom) | θB | CR > 10 | 70 | 80 | - | Deg. |
| Viewing angle (Left) | θL | CR > 10 | 70 | 80 | - | Deg. |
| Viewing angle (Right) | θR | CR > 10 | 70 | 80 | - | Deg. |
| Luminance (IF=20mA) | L | - | - | 350 | - | cd/m² |
| Surface Hardness (CTP) | - | GFF structure. | - | >6H | - | Pencil |
3.6 Inspection Standards (From Section 9)
The specification details the quality inspection criteria, including:
- AQL (Acceptable Quality Level): According to GB/T 2828-2003, normal inspection, Class II.
- Basic Inspection Conditions: The LCM face to us, in normal environment, about an angle of incidence 30°, a distance of 30cm with normal eye, with an angle of 45° to check the products without uncovering the film.
- Glass Defect Criteria: Specifies acceptable limits for cracks, glass extrusion, and damage to conductive/non-conductive areas.
- FPC Defect Criteria: Specifies acceptable limits for copper screen peel, release tape defects, and dirty dots/impurities on the FPC.
- Black Tape & Silicon Glue Defect Criteria: Specifies acceptable limits for tape shifts, missing tape, and glue contamination of ITO/circuit areas.
4. Application Guidelines & Critical Notes
Intended Use
- Standard 4.3-inch portrait-oriented display applications (e.g., smart home panels, industrial handhelds, point-of-sale terminals).
- Systems requiring an WVGA (480×800) resolution with a high-quality IPS display.
- Applications requiring a built-in capacitive touch panel (CTP) with high surface hardness and excellent optical clarity.
Critical Design Considerations
- Dual Power Supply (VCC=2.8V for Core, IOVCC=1.8V for I/O): The module requires a stable 2.8V supply for the core/analog circuitry and a separate 1.8V supply for the I/O interface. The logic thresholds (VIL, VIH) are referenced to IOVCC. Ensure the host processor's I/O voltage is compatible (typically 1.8V).
- External Backlight Driver (20mA @ 24V): The backlight consists of 8 LEDs in series, requiring an external boost-type constant-current LED driver capable of delivering 20mA at a forward voltage of 24V (Typ). The total backlight power is approximately 480mW.
- RGB Interface with SPI for Control: The module uses a parallel RGB interface for pixel data (R0-R7, G0-G7, B0-B7, HS, VS, DE, DCLK) and a 3-wire SPI interface (CS, SCL, SDI, SDO) for command/register configuration of the ST7701SN driver IC. The designer must implement both interfaces for full functionality. The SPI is used for initial configuration (e.g., display orientation, gamma settings).
- DOTCLK Frequency (~30MHz Max): The minimum DOTCLK cycle time is 33ns, which limits the pixel clock to ~30 MHz. For 480x800@60Hz, the required pixel clock is approximately 25-30 MHz. Ensure the host's pixel clock does not exceed this limit.
- IPS Display (All O'Clock Viewing): The display uses IPS technology, providing excellent viewing angles in all directions (80° min in all four directions). This is ideal for applications where the display is viewed from various angles.
- Capacitive Touch Panel (CTP) with GFF Structure: The module includes a built-in GFF (Glass-Film-Film) capacitive touch panel with surface hardness >6H. The touch panel interface pins (XD, XR, YU, XL) are NC (No Connection) in the module's interface list, indicating the touch controller is likely separate or not detailed in this snippet. The designer must consult the full module drawing for the touch panel's electrical and mechanical interface.
- Reset Sequence: The RESET pin requires a minimum low pulse width of 10μs. After the reset is released, the driver IC requires up to 5ms to load initial settings from NVM before it is ready to accept commands.
- Temperature Range (-20°C to +70°C Operating): A standard consumer/industrial temperature range. It is suitable for most indoor and outdoor applications.
- Mechanical Integration (Module Outline 63.96mm × 105.73mm × 3.42mm): The module is relatively thin (3.42mm) including the FPC and touch panel. The outline drawing specifies mechanical features like the active area, LCD/CF edge distances, and recommended foam window dimensions to avoid light leakage. The general tolerance is ±0.20mm.
- ESD and Handling: The document specifies ESD handling precautions. The front polarizer is glass, and the rear polarizer is attached. Do not apply excessive force to the display area.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass – handle with care. Avoid mechanical stress on the active area or FPC.
- Do not attempt to disassemble or modify the LCD module.
- The module is RoHS compliant.
- The customer's case foam window must not be larger than the specified opening in the outline drawing to avoid light leakage issues.
5. Conclusion & Design-In Support
The LSC043I08-R-V1 specification details a feature-rich, compact 4.3-inch WVGA (480×800) IPS TFT LCD module with an integrated capacitive touch panel, dual-power supply (2.8V/1.8V), and an RGB interface with SPI control — an excellent choice for portable and embedded applications requiring high-quality display and touch functionality.
Key Strengths
- IPS Display Technology: Superior wide viewing angles (80° in all directions) and excellent color reproduction compared to standard TN panels.
- Compact 4.3-inch Form Factor: Suitable for handheld and space-constrained designs.
- Integrated Capacitive Touch Panel (CTP): Reduces overall system integration complexity. The GFF structure with >6H surface hardness provides durability and clarity.
- WVGA Resolution (480×800): Good resolution for text and graphics in a 4.3" screen.
- High Brightness (350 cd/m²) and Contrast (1000:1): Excellent readability in various lighting conditions.
- Detailed Timing and Pinout Information: Comprehensive timing parameters and clear pin assignments facilitate straightforward system integration.
Main Design Focus
- The critical design tasks are providing dual power supplies (VCC=2.8V, IOVCC=1.8V) with proper sequencing, implementing a boost-type constant-current LED backlight driver (20mA at 24V), configuring the host processor's RGB interface with a pixel clock ≤30 MHz and correct timing for 480x800, and implementing the SPI interface (CS, SCL, SDI, SDO) for initial driver IC configuration.
- Supporting requirements: Connect all ground pins. Ensure the RESET pin can be driven low for at least 10μs. Integrate the capacitive touch panel's controller (refer to the full module drawing for touch panel details). Design the mechanical housing with the correct bezel opening to avoid light leakage (as specified in the outline drawing).
This module is an excellent choice for engineers designing compact embedded systems that require a high-quality, responsive touch display with wide viewing angles and standard interfaces.
