4 Inch Round TFT Display 720x720 IPS Screen with HDMI Driver Board Option
4 Inch Round TFT Display — 720x720 IPS with Optional HDMI Board
Looking for a compact, high-resolution round screen for your next smart mirror, gauge cluster, or Raspberry Pi build? This 4-inch circular IPS TFT display packs a sharp 720x720 resolution into a true round form factor — ideal for projects where a standard rectangular screen just won't fit the design.
The panel uses a MIPI interface natively, and for makers who want the simplest possible setup, we offer an add-on HDMI driver board that converts the signal to plug-and-play HDMI — no soldering, no custom firmware required. Just connect, power up, and display.
Why this display
True circular 720x720 resolution — every pixel is used inside the round active area, so there's no wasted black border like on some "fake round" displays.
Wide 85° viewing angle (IPS) — colors stay accurate even when viewed from the side, great for wall-mounted or dashboard-style installs.
HDMI board option — skip the MIPI driver headache; works with Raspberry Pi, Jetson Nano, mini PCs and most HDMI sources.
Compact 4-inch size — fits neatly into smart mirrors, control panels, meters, and car dashboard builds.
Stable performance — rated for -20°C to 70°C operating range, suitable for both indoor and light industrial use.
Common applications
Smart home control panels, DIY smart mirrors, Raspberry Pi HMI projects, car/motorcycle dashboard displays, PC sensor/monitoring panels (AIDA64-style), robotics face/eye displays.
Specification
| Category | Feature | Specification |
| Model Info | Model No. | HT040WX-303-1007V1 |
| Characteristics | Size | 4.0 inch |
| Resolution | 720 (horizontal)x 720 (vertical) | |
| Interface | 4-Lane MIPI | |
| Connect Type | Connector | |
| Pin No. | 30P | |
| Color Depth | 16.7M | |
| Technology Type | a-Si | |
| Pixel Pitch | 0.047 x 0.047 mm | |
| Pixel Configuration | R.G.B. Vertical Stripe | |
| Display Mode | Normally Black | |
| LCD Driver IC | JD9365DA | |
| Viewing Direction | ALL | |
| Gray Scale Inversion | ALL | |
| Luminance | 1500 cd/m2 | |
| Contrast Ratio | 1200:1 | |
| Operating Temperature | -30 ~ 80℃ | |
| Storage Temperature | -30 ~ 85℃ | |
| Mechanical | LCM ($W \times H \times D$) | 107.605x111.865x 3.8 mm |
| Active Area ($W \times H$) | 101.52 x 101.52 x mm | |
| With / Without TSP | Without TSP | |
| Weight | TBD | |
| LED Numbers | 10 LED |
Key Features
✔ Display Size: 4-inch round (circular active area)
✔ Resolution: 720 x 720 pixels (true round, no black border)
✔ Panel Type: IPS TFT, 85° wide viewing angle
✔ Native Interface: MIPI DSI
✔ Optional Add-on: HDMI driver board (plug-and-play, no coding required)
✔ Compatible with: Raspberry Pi, Jetson Nano, mini PC, most HDMI sources (with board)
✔ Operating Temp: -20°C to 70°C
✔ Ideal for: smart mirrors, dashboards, control panels, HMI projects
Drawing & Pin Definition
