The DBT021HFN40R030A is a compact 2.1-inch round TFT LCD module featuring a 480×480 resolution, RGB 40-pin interface, approximately 300 cd/m² brightness, and an IPS viewing design with wide viewing angles. Its circular form factor makes it suitable for applications where a conventional rectangular LCD cannot provide the desired industrial or product appearance.
Originally developed for applications such as flight simulator instrument displays and cockpit gauges, this 2.1-inch round LCD module can also be integrated into smart home control panels, smart appliances, home automation interfaces, compact HMI products, and other embedded display systems that require a small circular display.
With a compact module size of 56.18 × 59.71 × 2.26 mm and a 53.28 × 53.28 mm active area, the display provides a practical balance between visual resolution, installation space, and system integration flexibility.
The DBT021HFN40R030A is designed for embedded products that require a small, high-resolution circular display rather than a conventional rectangular TFT LCD.
Key features include:
2.1-inch circular TFT LCD module
480 × 480 pixel resolution
RGB 40-pin interface
Approximately 300 cd/m² typical brightness
IPS viewing technology
80°/80°/80°/80° viewing angle
53.28 × 53.28 mm active area
56.18 × 59.71 × 2.26 mm overall module dimensions
-20°C to +70°C operating temperature
White LED backlight
Compact structure for embedded equipment
Available customization options for selected project requirements
The 480×480 square pixel matrix combined with the circular display format is particularly useful for interfaces based on gauges, dials, status indicators, icons, and circular control layouts.
| Item | Specification |
|---|---|
| Model Number | DBT021HFN40R030A |
| Display Type | TFT LCD |
| Display Shape | Round / Circular |
| Display Size | 2.1 inch |
| Resolution | 480 × 480 pixels |
| Interface | RGB, 40-pin |
| Brightness | Approx. 300 cd/m² |
| Viewing Technology | IPS |
| Viewing Angle | 80°/80°/80°/80° |
| Active Area | 53.28 × 53.28 mm |
| Module Dimensions | 56.18 × 59.71 × 2.26 mm |
| Operating Temperature | -20°C to +70°C |
| Backlight | White LED |
| Application Type | Embedded display, instrument display, HMI and control interface |
Actual system integration should be evaluated against the complete electrical and mechanical requirements of the target device. Aptus can provide technical documentation and sample evaluation support for qualified projects.
A circular LCD can provide advantages that are difficult to achieve with a conventional rectangular display.
For products designed around knobs, rotary controls, gauges, circular indicators, or round industrial interfaces, a circular display can follow the physical design of the product more naturally. Instead of placing a rectangular display inside a circular housing and leaving unused areas around the interface, a round LCD can make better use of the available visual area.
This is especially valuable in compact equipment where the display is part of the product's industrial design.
The 480×480 resolution also provides sufficient pixel density for detailed graphical interfaces, numerical information, icons, gauge markings, and system status information on a compact display.
The original application of the DBT021HFN40R030A is flight simulator instrumentation.
A round display is particularly suitable for simulator cockpit instruments because many aviation instruments are visually based on circular gauges. The DBT021HFN40R030A can be considered for applications such as:
Flight simulator instrument panels
Cockpit gauge displays
Altimeter interfaces
Heading and compass displays
Attitude indicator graphics
Vertical speed indicators
Engine parameter displays
Aviation training equipment
Custom electronic gauges
The circular format allows the display graphics to follow the shape of traditional cockpit instruments, helping simulator manufacturers create a more realistic instrument layout.
The 480×480 resolution can also support detailed graphical elements such as numerical values, scale markings, indicators, and dynamic instrument graphics.
For simulator manufacturers, the 40-pin RGB interface provides an established connection option for compatible display controller architectures. The exact controller and electrical design should be verified during project integration.
Beyond aviation simulation, the compact round LCD format is also suitable for smart home control interfaces.
Smart home products increasingly use compact displays to provide device status, operating modes, temperature information, timers, schedules, and control options. A circular display can provide a distinctive interface for products where a traditional rectangular display does not match the physical design.
Potential applications include:
Smart home control panels
Smart lighting controllers
Smart thermostat interfaces
Home climate control panels
Smart air-conditioning controls
Smart ventilation controls
Smart kitchen appliance interfaces
Smart coffee machines
Smart ovens and cooking appliances
Smart washing machine interfaces
Smart air purifiers
Smart humidifiers
Smart home hubs
Compact home automation controllers
For example, a smart home controller could use the circular display to show room temperature in the center, with surrounding graphics representing lighting, air conditioning, ventilation, or other connected devices.
For a smart appliance, the round LCD can be integrated into a control panel to display operating status, selected modes, remaining time, temperature settings, or other device information.
This makes the module particularly interesting for product designers looking for a small circular LCD display for smart appliances or smart home interfaces.
The DBT021HFN40R030A can also be evaluated for compact HMI applications where physical space is limited.
The 2.1-inch size allows the module to fit into relatively small equipment housings while maintaining a 480×480 graphical interface.
Possible applications include:
Compact industrial control interfaces
Embedded HMI devices
Rotary control interfaces
Digital gauges
Measurement instruments
Laboratory equipment
Building automation controllers
Energy management interfaces
Equipment status indicators
Customized control panels
The display can be paired with a physical rotary knob, buttons, or other control mechanisms to create a compact user interface. Depending on project requirements, Aptus can also evaluate touch panel integration.
Mechanical integration is an important consideration when selecting a circular LCD module.
The DBT021HFN40R030A measures approximately 56.18 × 59.71 × 2.26 mm, making it suitable for compact embedded product designs.
The relatively thin module structure can help product engineers design a display area without requiring excessive internal space. However, the final enclosure should account for the display module, connector, FPC routing, controller board, mounting structure, thermal requirements, and any additional touch or cover-glass components.
For smart appliances and home control products, the circular form factor can also become part of the product's visual identity rather than functioning only as a display component.
The module uses IPS display technology and provides an approximately 80°/80°/80°/80° viewing angle specification.
This characteristic can be useful for applications where the user may not always view the display directly from the center. Smart home controllers, appliances, cockpit instruments, and compact HMI devices may be viewed from different positions depending on how the product is installed.
The approximately 300 cd/m² brightness level is suitable for many indoor and controlled-environment applications. For products requiring higher brightness because of strong ambient lighting or specialized viewing conditions, Aptus can evaluate alternative display configurations or brightness requirements during the project development stage.
Different applications can require different mechanical and optical configurations. Aptus provides customization support for selected display projects.
Depending on the application and project requirements, customization may include:
Capacitive touch panel integration
Resistive touch options
Custom cover glass
GG5 cover-glass solutions
Optical bonding
Connector configuration
FPC layout
Mechanical structure
Brightness adjustment
Interface adaptation
Customized display solutions
For a smart home or smart appliance project, for example, a touch panel can be integrated to turn the circular LCD into a compact interactive control interface.
For flight simulator projects, customized mechanical structures, connector arrangements, and brightness requirements can be evaluated according to the cockpit design.
When selecting a circular LCD for a new product, engineers should consider more than display size and resolution.
Important factors include the available installation area, active display area, interface compatibility, brightness, viewing angle, operating temperature, controller compatibility, FPC routing, mounting method, touch requirements, and expected production quantity.
The DBT021HFN40R030A is particularly suitable when a project requires:
A compact 2.1-inch circular form factor + 480×480 resolution + RGB interface + approximately 300-nit brightness + wide viewing angles.
For projects requiring a different interface, higher brightness, touch functionality, or a different circular size, Aptus can evaluate alternative LCD modules and customization options.
Shenzhen Aptus Technology Co., Limited has been engaged in the LCD display industry since 2014, focusing on the R&D, manufacturing, and marketing of LCD display solutions for international customers.
Aptus provides TFT LCD modules, touch panels, control and driver boards, cables, backlight solutions, and integrated display solutions. The company supports both standard display products and customized display development according to project requirements.
The technical team can assist with requirements involving:
Custom resolution
Brightness optimization
Display interface
Touch panel integration
Mechanical structure
Connector and FPC configuration
Wide-temperature requirements
Display bonding
Sample evaluation
Project-based display development
Aptus also operates under an ISO9001 quality management system and supports international customers with sample evaluation, technical communication, and global shipping.
For customers developing flight simulator instruments, smart home control panels, smart appliances, compact HMI equipment, or other embedded products, Aptus can help evaluate the appropriate LCD architecture from the early product-development stage.
Yes. The 2.1-inch circular form factor, 480×480 resolution, and compact module dimensions make it suitable for evaluating smart home controllers, compact automation interfaces, lighting controls, thermostats, and other embedded home-control products.
Yes. The module can be considered for smart appliances such as coffee machines, air purifiers, ovens, climate-control products, and other equipment that requires a compact graphical interface. The final application should be evaluated based on the appliance's electrical, mechanical, environmental, and user-interface requirements.
The DBT021HFN40R030A provides a 480×480 pixel resolution.
The module uses a 40-pin RGB interface. System developers should verify controller compatibility and electrical timing requirements before integration.
The typical brightness is approximately 300 cd/m².
The specified operating temperature range is -20°C to +70°C.
Aptus can evaluate capacitive or resistive touch integration for customized projects. Cover glass and optical bonding options can also be considered depending on the application.
Yes. Flight simulator instrumentation remains one of the key applications for this circular LCD. Its round shape is particularly appropriate for cockpit gauges, instrument panels, and digital aviation indicators.
Yes. Aptus supports selected customization requirements, including touch integration, cover glass, optical bonding, connector/FPC configuration, brightness adjustment, and mechanical integration.
If you are developing a flight simulator instrument, smart home control panel, smart appliance, compact HMI, digital gauge, or other embedded product and need a small circular LCD module, the DBT021HFN40R030A can be evaluated as a potential display solution.
Contact Aptus Display for:
Product specifications and datasheets
Sample evaluation
Display compatibility assessment
Touch panel integration
Mechanical integration consultation
Customized display requirements
Project quantity and quotation
Long-term supply support
👉 Request a quote or sample
📧 Or email us directly: info@aptusdisplay.com
Click here for the complete product catalog
