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Product type：TFT LCD
Show contents：540x540
Outline size(mm) ：72.54x76.47
Size of View Window(mm)：2.8
Display size(mm) ：2.8
Effective size(mm)：70.15x70.15
Product application：handheld devices, small speakers, small home appliances
Visual angle：IPS
Backlight type or brightness：450cd/m2
Connection PIN Number：FPC-40PIN
Interface mode：RGB
Special instructions：Anti-static ESD 8KV
Working temperature：-20~70℃
Power supply voltage：3.3V
Driver chip model：AXS15260D
The TFT-H028A28ZUIAX4N40 is a 2.8-inch circular IPS TFT LCD module with a high resolution of 540 × 540 pixels, delivering clear and detailed display performance. With an NTSC 65% color gamut, it offers vibrant color reproduction suitable for embedded systems, industrial instruments, smart wearable devices, and other applications requiring high-quality visuals.
This module operates in Normally Black mode and supports a 24-bit RGB interface at 60Hz refresh rate, ensuring stable data transmission. It operates at 3.0V ± 0.3V, making it power-efficient and ideal for portable devices.
The module features an integrated touch panel (In-Cell CTP, model AXS15260D), supporting I2C communication (TP-SCL/TP-SDA) and providing interrupt and reset functionality.
Mechanically, it adopts a circular design with an outer diameter of approximately 76.47mm and an active display area of 70.15mm. The module is reinforced with a PI stiffener and SUS steel plate for enhanced rigidity. The 40-pin connector with 0.5mm pitch supports high-density PCB designs.
| Item | Specification |
|---|---|
| Screen Size | 2.8-inch (Circular) |
| Resolution | 540 × 540 Pixels |
| Display Type | IPS TFT, Normally Black |
| Color Gamut | NTSC 65% |
| Interface Type | 24-bit RGB Interface (60Hz) |
| Pin Count | 40 Pins, 0.5mm Pitch |
| Operating Voltage | 3.0V ± 0.3V |
| Brightness | 450 ± 100 cd/m2 (Constant Current Test) |
| Operating Temperature | -30℃ ~ +80℃ |
| Storage Temperature | -20℃ ~ +70℃ |
| Backlight Conditions | Vf = 3.2 ± 0.3V, If = 100 mA |
| Touch Panel | In-Cell CTP (Model: AXS15260D) |
| Outline Dimensions | φ76.47 ± 0.2mm (Overall), Active Area φ70.15mm |
| Mechanical Structure | PI Stiffener + SUS Steel Reinforcement, Thickness ~1.20mm |
| Usage Recommendation | Avoid displaying static images for extended periods. Use black or moving images as a screensaver. |
| Pin No. | Signal Name | Type | Description |
|---|---|---|---|
| 1 | LEDK | Power | Backlight Cathode |
| 2 | LEDA | Power | Backlight Anode |
| 3 | GND | Ground | Power Ground |
| 4 | DR0 | Data | RGB Red Data Bit 0 |
| 5 | DR1 | Data | RGB Red Data Bit 1 |
| 6 | DR2 | Data | RGB Red Data Bit 2 |
| 7 | DR3 | Data | RGB Red Data Bit 3 |
| 8 | DR4 | Data | RGB Red Data Bit 4 |
| 9 | DR5 | Data | RGB Red Data Bit 5 |
| 10 | DR6 | Data | RGB Red Data Bit 6 |
| 11 | DR7 | Data | RGB Red Data Bit 7 |
| 12 | DG0 | Data | RGB Green Data Bit 0 |
| 13 | DG1 | Data | RGB Green Data Bit 1 |
| 14 | DG2 | Data | RGB Green Data Bit 2 |
| 15 | DG3 | Data | RGB Green Data Bit 3 |
| 16 | DG4 | Data | RGB Green Data Bit 4 |
| 17 | DG5 | Data | RGB Green Data Bit 5 |
| 18 | DG6 | Data | RGB Green Data Bit 6 |
| 19 | DG7 | Data | RGB Green Data Bit 7 |
| 20 | DB0 | Data | RGB Blue Data Bit 0 |
| 21 | DB1 | Data | RGB Blue Data Bit 1 |
| 22 | DB2 | Data | RGB Blue Data Bit 2 |
| 23 | DB3 | Data | RGB Blue Data Bit 3 |
| 24 | DB4 | Data | RGB Blue Data Bit 4 |
| 25 | DB5 | Data | RGB Blue Data Bit 5 |
| 26 | DB6 | Data | RGB Blue Data Bit 6 |
| 27 | DB7 | Data | RGB Blue Data Bit 7 |
| 28 | GND | Ground | Power Ground |
| 29 | PCLK | Clock | Pixel Clock |
| 30 | HSD | Sync | Horizontal Synchronization |
| 31 | VSD | Sync | Vertical Synchronization |
| 32 | DEN | Control | Data Enable |
| 33 | TP-INT | Control | Touch Panel Interrupt |
| 34 | TP-RTN | Power | Touch Panel Power Return |
| 35 | GND | Ground | Power Ground |
| 36 | TP-SCL | Communication | Touch Panel I2C Clock |
| 37 | TP-SDA | Communication | Touch Panel I2C Data |
| 38 | TFT-RES | Control | TFT Reset Signal |
| 39 | NC | No Connection | Reserved Pin |
| 40 | VCI | Power | Logic Power Supply (3.0V) |
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