HOTHMI 3 inch Bar Display 268 × 800 High Brightness

Product Overview

HTM-H030W13-UART-A03C is a 3.0-inch TFT Bar Display designed for equipment with limited installation space. It features a 268 × 800-pixel Normally Black TFT LCD panel, with a typical brightness of 500 cd/m² and a 60% NTSC color gamut. The display module integrates a TFT LCD, capacitive touch panel, and controller PCB, and supports UART communication.

The module operates at a typical DC 5V supply voltage and has an operating temperature range of -20°C to +70°C. With its narrow and elongated display format and serial control interface, this Bar Display is suitable for smart home devices, building control systems, industrial equipment, instrumentation, communication equipment, and other products that require a non-standard display format.

Key Specifications

Product Highlights

Narrow and Elongated Bar Display for Space-Constrained Applications

The 268 × 800-pixel resolution gives this display a distinctive narrow and elongated format. Compared with conventional wide TFT displays, this Bar Display is better suited to equipment with narrow display openings or irregular front-panel layouts.

It can be used to display device status, operating parameters, menus, icons, curves, and other graphical information while taking up less space on the equipment front panel. The 3.0-inch size also makes it easier to maintain a compact overall design. The installation orientation can be selected according to the mechanical structure and UI layout of the finished product.

500 cd/m² Brightness and Wide Viewing Angle

This Bar Display uses a Normally Black TFT LCD panel with a typical brightness of 500 cd/m². It is suitable for indoor equipment and applications exposed to relatively high ambient light conditions.

The module provides a viewing angle of 80° in the up, down, left, and right directions. For equipment where the display position or operator viewing angle is not fixed, this wide viewing angle can help reduce display limitations caused by changes in viewing position.

UART Serial Control for Embedded HMI Applications

One of the key features of this Bar Display is its serial communication interface for display control. The module supports UART (TTL) communication and uses a compact 4-pin connector. The reduced number of interface pins helps simplify the connection and wiring between the display module and the main control board.

In embedded applications, the host MCU can communicate with the display module through serial commands without directly handling the underlying TFT LCD timing and display driving. For certain HMI applications, this architecture can reduce the display processing workload on the host MCU and simplify display integration.

Onboard Resource Storage for UI Content Management

The display module provides 128M-Bit of onboard resource storage. Images, fonts, icons, and other UI resources can be stored within the display system, reducing reliance on the host MCU’s Flash memory.

The module supports resource downloading and updating through a dedicated TF card. This can be used for UI debugging during development and also makes it easier to update display resources during production and subsequent maintenance.

Integrated Capacitive Touch for Graphical HMI

HTM-H030W13-UART-A03C integrates a capacitive touch panel (CTP), allowing users to interact directly with the displayed information and device functions.

For equipment with limited front-panel space that also needs to reduce the number of physical buttons, capacitive touch provides a more flexible approach to human-machine interaction.

Interface and Connector

The compact 4-pin connector design is suitable for embedded equipment where PCB space and cable quantity need to be carefully considered.

Typical Bar Display Applications

Smart Home and Building Control

The narrow and elongated format makes this Bar Display suitable for wall-mounted control panels, thermostats, lighting controllers, ventilation equipment, and building automation terminals.

Compared with conventional rectangular displays, the elongated display area can be integrated more easily into narrow equipment panels. It can be used to display temperature, humidity, operating status, schedules, and device control menus.

Industrial Equipment and Control Panels

Industrial equipment front panels often need to accommodate buttons, indicators, connectors, and other mechanical components, so the available space for a display may not have a conventional shape.

A 3.0-inch Bar Display can provide an independent display and control interface within a limited panel area. It can be used to display equipment status, operating parameters, alarm information, menus, and touch-based controls.

Networking and Communication Equipment

This display can also be used in networking equipment, communication devices, and other compact control systems.

Its narrow display area can provide information such as operating status, connection information, device parameters, and alerts without requiring a large external display.

Medical and Laboratory Equipment

Medical and laboratory equipment often needs to accommodate displays, mechanical components, sample areas, control buttons, and other functional parts within a limited enclosure.

For equipment where the available display area is restricted, a Bar Display provides an alternative to conventional rectangular displays. The integrated capacitive touch function can also be used for menu navigation and parameter input.

Smart Home Appliances

This display module can be used in smart home appliances with narrow display areas, including certain kitchen appliances, ventilation equipment, and other connected home products.

The combination of TFT graphical display and capacitive touch provides more flexibility for UI design compared with conventional numeric displays or fixed LED indicators.

Frequently Asked Questions

Q1：Can this Bar Display be connected to an MCU?

A：Yes. The module supports UART (TTL) serial communication. A compatible MCU can communicate with the display module through the RXD and TXD signals. The specific communication method should follow the corresponding display control protocol.

Q2：Does this display support touch?

A：Yes. HTM-H030W13-UART-A03C integrates a capacitive touch panel (CTP), making it suitable for HMI products that require user interaction.

Q3：What should be considered when designing the equipment enclosure?

A：The display component thickness, PCB component height, connector position, mounting structure, and internal clearance should all be considered during mechanical design.

The maximum component height on the PCB side is 5.50 mm Max, while the TFT + OCA + CTP assembly thickness is approximately 3.77 ± 0.3 mm. These dimensions should be included in the overall mechanical stack-up design.

Need a Customized Bar Display?

If you are developing industrial equipment, smart terminals, or other embedded products that require a Bar Display, HOTHMI can assist in evaluating display size, resolution, brightness, touch functionality, communication interface, operating temperature, mechanical dimensions, and other application requirements.

If your product has limited installation space or requires a special display format, feel free to contact HOTHMI to discuss your specific display requirements and customization options.