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Display Modules
4-Inch Round TFT LCD Display, 720×720 Resolution, MIPI Interface, Optional CTP Touch Panel
Display and controller solution support for engineering-driven projects.
– LCD Size: 4.0 inches
– Resolution: 720 × 720 pixels
– Brightness: 350 cd/m²
– Interface Type: MIPI
– Touch Support: Optional CTP Touch Panel
For faster evaluation, please share your target application, display size, resolution, interface, touch requirement, controller board requirement, and annual demand.
Engineering Review
Confirm Product Fit Before Sampling
Display and controller board projects usually require more than a model number. RJY can review your technical requirements before sample or quotation discussion.
01
Specification Matching
Check display size, resolution, brightness, viewing angle, touch requirement, and operating environment.
02
Interface & Board Review
Review interface type, pin definition, controller board requirement, driver IC, and system compatibility.
03
Customization Direction
Discuss cover glass, backlight, touchscreen, FPC, firmware, and mechanical coordination when needed.
04
RFQ Preparation
Prepare application details, sample quantity, annual demand, target timeline, datasheet, or reference product.
This 4-inch round TFT LCD display is designed for embedded applications requiring a circular display format, high-quality image performance, and compact system integration. Featuring a 720×720 resolution, 350 cd/m² brightness, and a MIPI interface, this module provides a reliable display solution for smart devices, wearable electronics, industrial HMI systems, and customized embedded products.
The round LCD design provides a distinctive visual appearance while maintaining efficient space utilization for compact product designs. The module supports optional capacitive touch panel (CTP) integration, allowing developers to create interactive interfaces for smart terminals, control systems, and embedded equipment.
Equipped with the JD9365DA driver IC, this display module supports stable image control and reliable embedded system integration. With a thin module structure measuring 105.6 × 109.87 × 2.1 mm and an operating temperature range of -20°C to +70°C, it is suitable for various embedded and industrial display applications.
Specification Table
| Item | Specification | Unit | Remark |
|---|---|---|---|
| LCD Size | 4.0 | inch | Round display |
| Resolution | 720 × 720 | pixels | High-resolution circular display |
| Driver IC | JD9365DA | — | Display driver IC |
| Viewing Area | 101.52 × 101.52 | mm | Active display area |
| Module Size | 105.6 × 109.87 × 2.1 | mm | Thin module design |
| Brightness | 350 (Typ.) | cd/m² | Standard brightness |
| Interface | MIPI | — | High-speed embedded interface |
| Touch Panel | Without / With CTP | — | Optional capacitive touch support |
| Operating Temperature | -20 ~ +70 | °C | Industrial application range |
Key Features
4-Inch Round TFT LCD Design
The circular display structure provides a unique appearance for embedded products and supports product designs where traditional rectangular displays are not suitable.
720×720 High-Resolution Display
The 720×720 pixel resolution delivers clear graphics, detailed icons, and smooth user interface rendering for smart devices and embedded systems.
MIPI Interface Support
The MIPI interface provides an efficient connection option for embedded platforms requiring compact design, reduced wiring complexity, and reliable display communication.
Optional Capacitive Touch Function
The module supports optional CTP touch panel integration, enabling interactive operation for HMI systems, smart terminals, and customized electronic products.
Thin and Compact Mechanical Structure
With an outline dimension of 105.6 × 109.87 × 2.1 mm, this round TFT LCD module is suitable for applications requiring a lightweight and space-efficient display solution.
Wide Operating Temperature Range
The module supports operation from -20°C to +70°C, making it suitable for various embedded and industrial environments.
Applications
- Smart Wearable Devices
- Industrial HMI Systems
- Smart Home Control Interfaces
- IoT Embedded Terminals
- Portable Electronic Equipment
- Medical Device Interfaces
- Automotive Interior Displays
- Customized Embedded Products
Application Scenarios
Advanced Wearable Devices
The round 4-inch display provides a modern circular interface solution for wearable electronics and portable products requiring clear visual output.
Embedded HMI Control Systems
The combination of high resolution, MIPI interface, and optional touch support makes this display suitable for compact human-machine interaction systems.
Smart Home Interfaces
The circular display format helps create visually distinctive smart switches, control panels, and connected home devices.
Industrial Monitoring Equipment
The thin structure and wide operating temperature range support integration into industrial instruments, monitoring systems, and embedded control equipment.
Customized Display Projects
RJY Display supports project-based display customization, including touch integration, interface adaptation, backlight customization, and controller matching according to application requirements.
Why Choose This 4-Inch Round TFT LCD Display?
- 720×720 high-resolution round display for detailed graphical interfaces
- MIPI interface support for compact embedded system integration
- Optional CTP touch panel for interactive applications
- Thin module structure for space-limited product designs
- Wide operating temperature range for embedded applications
- Suitable for smart devices, HMI systems, and industrial equipment
- Customization support based on project requirements
Request Information
Would you like to receive the datasheet, 3D model (STEP file), or a sample quote for evaluation?
Contact RJY Display for display integration support and customized TFT LCD solutions.
FAQ
Is RJY an Original Equipment Manufacturer (OEM)?
Yes. RJY is a direct provider and manufacturer with vertically integrated capabilities, offering full-cycle hardware innovation from design and PCBA assembly to final system integration.
What types of customization does RJY accept?
We can provide customization in the following four distinct areas: Systems & HMI、Display Modules、Software Services、Industrial Design.
What is the stock status for this product?
Most products on display have at least one unit in stock for testing or quick sampling. For sample requests over 20 units, please check with us in advance to ensure the current stock status.
How are the fees structured for custom projects?
Our custom project fees typically consist of two main components:
NRE (Non-Recurring Engineering) fees and unit pricing.
In many cases, if your order reaches a certain volume, we offer to offset or credit a portion of the NRE fees back to you.
NRE (Non-Recurring Engineering) fees and unit pricing.
In many cases, if your order reaches a certain volume, we offer to offset or credit a portion of the NRE fees back to you.
How long does a typical customization project take?
The timeline depends on the depth of customization:
Software/Firmware Tweaks: 1-2 weeks
Minor Hardware Modifications: 4-6 weeks
Full-Cycle R&D Projects: 12-16 weeks
Software/Firmware Tweaks: 1-2 weeks
Minor Hardware Modifications: 4-6 weeks
Full-Cycle R&D Projects: 12-16 weeks
Knowledge Hub
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