LSR043T06-R-V1 | 4.3 inch TFT-LCD Module | 480x272 | RGB 24-bit | TN | Resistive Touch
1. Executive Summary & Product Positioning
The LSR043T06-R-V1 is a 4.3-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). It is composed of a TFT-LCD panel, a driver circuit, a backlight unit, and an integrated 4-wire resistive touch panel. The panel size is 4.3 inch and the resolution is 480(RGB)*272, the panel can display up to 16.7M colors.
Product Positioning: Designed for a wide range of embedded and industrial applications requiring a medium-resolution color display with touch input. Typical uses include smart home control panels, portable instruments, point-of-sale terminals, and other human-machine interface (HMI) systems where cost-effectiveness and reliable touch interaction are essential.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 4.3-inch diagonal, a-Si TFT active matrix, transmissive, TN (Twisted Nematic) normally white mode. Resolution is 480(RGB) × 272 pixels with an active area of 95.04 × 53.856 mm.
- Driver IC: The module uses the NV3047E driver IC, which supports a 24-bit RGB parallel interface.
- Display Mode: Normally White.
- Backlight Unit (B/L): A white LED backlight unit with 7 chips in series. The typical driving condition is IF=20mA, VF=21V. The luminance is marked as TBD (To Be Determined) in the specification.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L + RTP (Resistive Touch Panel). The module outline dimensions are 105.5 (H) × 67.2 (V) × 6.7 (D) mm (including touch panel and backlight).
- Interface: The module communicates via a 40-pin FPC connector. The display interface is 24-bit RGB parallel (8 bits per color).
- Touch Panel: Integrated 4-wire resistive touch panel with dedicated pins (XR, YD, XL, YU).
- Viewing Direction: TN (12 O'Clock).
- Color Gamut: 50% (Typ).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 4.3 inches |
| Resolution (Dots) | 480(RGB) × 272 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si |
| Module Construction | COG+FPC+B/L+RTP |
| Color Depth | 16.7M Colors (24-bit RGB) |
| Viewing Direction (Grayscale Inversion) | TN (12 O'Clock) |
| Input Data Interface | 24-bit RGB Parallel |
| Driver IC | NV3047E |
| Active Area (H×V) | 95.04 × 53.856 mm |
| CF Size (H×V) | 100.16 × 58.556 mm |
| Module Size (H×V×D) | 100.16 × 61.856 × (max depth) mm (Panel only, excluding FPC and connector) |
| Light Bar Outline (H×V×D) | 105.5 × 19.46 × 0.5 mm |
| Pixel Pitch | 0.066 (H) × 0.198 (V) mm |
| Pixel Arrangement | RGB Vertical Stripe |
| Display Mode | Normally White |
| Color Gamut | 50% (Typ.) |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
3.2 Absolute Maximum Ratings (Ta=25°C)
Stress beyond those listed may cause permanent damage.
| Parameter | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage (VCC) | VCC | -0.3 | 4.6 | V | Note1, Note2 |
| I/O Supply voltage | IOVCC | -0.3 | 4.6 | V | Note1, Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1, Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1, Note2 |
3.3 Electrical Characteristics (Ta=25°C)
3.3.1 Recommended Operating Conditions
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 3.0 | 3.3 | 3.6 | V |
| I/O supply voltage | IOVCC | 1.65 | -- | VCC | V |
| Input voltage (Low level) | VIL | 0 | -- | 0.3*IOVCC | V |
| Input voltage (High level) | VIH | 0.7*IOVCC | -- | IOVCC | V |
3.3.2 Backlight LED Characteristics
The circuit diagram shows a series of 7 White LED chips.
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage (Total) | VF | 21 | V |
| Forward Current | IF | 20 | mA |
3.4 Interface Pin Assignment (40-Pin FPC)
Connector: FH19-40S-05SH(51) or equivalent.
| Pin No. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Backlight power supply negative |
| 2 | LEDA | P | Backlight power supply positive |
| 3 | GND | P | Ground |
| 4 | VCC | P | Power supply |
| 5-12 | R0-R7 | I | Red Data (8 bits) |
| 13-20 | NC | -- | No Connection (Note: This differs from LSR043T04-R-V1 which uses these for Green data) |
| 21-28 | NC | -- | No Connection (Note: This differs from LSR043T04-R-V1 which uses these for Blue data) |
| 29 | GND | P | Ground |
| 30 | CLK | I | Clock signal |
| 31 | DISP | I | Display on/off |
| 32 | HS | I | Horizontal sync input (short to GND if not used) |
| 33 | VS | I | Vertical sync input (short to GND if not used) |
| 34 | DE | I | Data enable |
| 35 | NC | -- | No Connection |
| 36 | GND | P | Ground |
| 37 | XR | I | Touch panel X-right |
| 38 | YD | I | Touch panel Y-bottom |
| 39 | XL | I | Touch panel X-left |
| 40 | YU | I | Touch panel Y-up |
Note: The pinout for LSR043T06-R-V1 appears incomplete in the provided spec. Pins 13-28 (normally used for Green and Blue data in a full 24-bit RGB interface) are listed as NC (No Connection). This may indicate an 8-bit interface or a different configuration for this specific model. Please verify with the full manufacturer datasheet.
3.5 Timing Characteristics (RGB Mode)
The timing table for LSR043T06-R-V1 was not fully captured in the knowledge base. The following parameters are from the LSR043T04-R-V1 spec, which shares the same resolution and driver IC (NV3047E) structure. The LSR043T06-R-V1 specific values should be confirmed from the full datasheet.
| Item | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| DCLK Frequency | Fclk | 24 | 27 | 30 | MHz |
| DCLK Period | Tclk | 33 | 37 | 42 | ns |
| Frame Rate | FR | -- | -- | 75 | Hz |
| HSYNC Period | Th | -- | 1491 | -- | DCLK |
| HSYNC Display Period | Thdisp | -- | 1440 | -- | DCLK |
| HSYNC Back Porch | Thbp | -- | 43 | -- | DCLK |
| HSYNC Front Porch | Thfp | -- | 8 | -- | DCLK |
| HSYNC Pulse Width | Thw | -- | 4 | -- | DCLK |
| VSYNC Period | Tv | -- | 292 | -- | H |
| VSYNC Display Period | Tvdisp | -- | 272 | -- | H |
| VSYNC Back Porch | Tvbp | -- | 12 | -- | H |
| VSYNC Front Porch | Tvfp | -- | 8 | -- | H |
| VSYNC Pulse Width | Tvw | -- | 4 | -- | H |
Note: In sync mode, it is necessary to keep Tvbp = 12, Tvfp = 8, Tvw = 4, Thbp = 43, Thfp = 8, Thw = 4. Thbp must be >10 and Tvbp+Tvfp < 128.
3.6 Power ON/OFF Sequence
The power sequence must be strictly followed to prevent damage to the module. Timings are identical to the LSR043T04-R-V1 specification.
3.6.1 Power On Sequence
| Symbol | Description | Min. Time | Unit |
|---|---|---|---|
| T0 | Determined by the external power | 0 | ms |
| T1 | Time from stable VDD set-up to DISP | 0 | ms |
| T2 | Time from DISP="High" to the first VSYNC | 0 | ms |
| T3 | Display Signal output to Backlight Power on | 15 * Frame | ms |
3.6.2 Power Off Sequence
| Symbol | Description | Min. Time | Unit |
|---|---|---|---|
| T0 | Backlight power off to DISP="Low" | 5 | ms |
| T1 | DISP="Low" to IC internal voltage discharge complete | 6 * Frame | ms |
3.7 Optical Characteristics (Ta=25°C)
| Item | Symbol | Condition | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response Time (Tr+Tf) | Tr+Tf | θx = θy = 0° | -- | 20 | 30 | ms | Note 1 |
| Contrast Ratio | CR | θx = θy = 0° | 500 | 700 | -- | -- | Note 2 |
| Transmittance | T% | θx = θy = 0° | -- | 6.85 | -- | % | |
| Color Chromaticity (CIE1931) White | Wx, Wy | θx = θy = 0° | -- | (0.301, 0.337) | -- | -- | |
| Viewing Angle (Top) | θT | CR > 10 | -- | 80 | -- | Deg. | Note 3 |
| Viewing Angle (Bottom) | θB | CR > 10 | -- | 80 | -- | Deg. | Note 3 |
| Viewing Angle (Left) | θL | CR > 10 | -- | 60 | -- | Deg. | Note 3 |
| Viewing Angle (Right) | θR | CR > 10 | -- | 70 | -- | Deg. | Note 3 |
| Luminance | L | θx = θy = 0°, IF=40mA | -- | TBD | -- | cd/m² | Note 4 |
Note: The Luminance value is marked as TBD (To Be Determined) in the spec.
4. Application Guidelines & Critical Notes
- Power Supply: The module requires a single 3.3V (Typ.) power supply for VCC. The I/O voltage (IOVCC) can range from 1.65V to VCC. Ensure the power supply ripple is minimized.
- RGB Interface: The interface pins (R0-R7) are available. Pins 13-28 are marked as NC. Verify the complete interface protocol for this model, as it may not be a full 24-bit RGB parallel interface. The timing parameters (DCLK up to 30MHz) are standard. HS and VS can be shorted to GND if not used, provided DE is used.
- Backlight Driver (External): The module provides LEDA (anode) and LEDK (cathode) pins. An external constant current driver is required. The typical forward voltage is 21V and the current is 20mA for the series string.
- Touch Panel (RTP): The 4-wire resistive touch pins (XR, YD, XL, YU) provide the raw analog touch coordinates. These must be read by an external touch controller (ADC) on the main board.
- Power Sequence: Strictly follow the Power ON/OFF sequence. The display must be active (VSYNC running) before the backlight is turned on (T3 ≥ 15 frames). During power off, the backlight must be turned off before DISP goes low (T0 ≥ 5ms).
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD).
5. Conclusion & Design-In Support
The LSR043T06-R-V1 from Lesson Smart Display Technology is a 4.3-inch TFT-LCD module similar to the LSR043T04-R-V1 but with a different pin configuration. It shares the same resolution (480×272), contrast ratio (700:1), and general feature set. The most significant difference noted from the provided data is the pinout, where the Green and Blue data pins appear to be unconnected (NC). The luminance is listed as TBD.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the accurate pinout, timing diagrams, and luminance value (TBD). The provided data may be incomplete.
- Design a clean 3.3V power supply and a backlight constant current driver circuit capable of delivering 20mA at about 21V.
- Contact the manufacturer for evaluation modules, sample requests, and further technical support during the design-in phase.
This module is designed to provide a reliable and cost-effective display solution.
