Description
7.8 Inch TFT LCD | 400×1280 With LVDS Interface Sunlight Readable
The HTM-H078A02-UART-A01C is a Smart LCD Display module featuring normally black display technology and a UART serial communication interface, making it suitable for small to medium-sized embedded applications requiring high contrast, low power consumption, and stable display performance. This Smart LCD Display supports UART serial communication, enabling efficient data exchange with host controllers, and is ideal for industrial control, human-machine interfaces, smart home devices, portable instruments, and more.
The bare screen version is TFT-H078A02ZAINVTN40
Core Application Scenarios
With its stable display performance and flexible interface design, this Smart LCD Display is widely used in the following fields:
- Industrial Control and Automation Equipment
In industrial HMIs, equipment often runs for extended periods, displaying fixed status bars, parameter setting panels, and similar content. This Smart LCD Display supports fast content updates via the UART interface, allowing users to follow the recommended refresh rate of at least once every two minutes to effectively prevent image retention and ensure clear, readable display during long-term operation.
- Smart Home and Intelligent Terminals
In smart control panels, smart thermostats, security panels, and similar devices, interfaces typically combine fixed icons with dynamic data switching. This Smart LCD Display supports black or dynamic screensaver modes, making it ideal for automatically switching display content when unattended, thereby saving energy while protecting the screen.
- Medical and Portable Devices
In portable monitors and handheld diagnostic devices, display modules must offer low power consumption, high readability, and stable communication capabilities. The UART interface simplifies system integration, and the normally black panel can further reduce power consumption by entering black screen mode during idle periods.
Product Highlights
Normally Black Panel for Superior Display Quality:This Smart LCD Display uses a normally black panel, which appears black when no voltage is applied. It delivers higher native contrast and deeper black levels, making it well-suited for low-light environments and reducing backlight power consumption when displaying dark content.
UART Communication Interface Simplifies System Integration:Compared to parallel or SPI interfaces, the UART interface consumes fewer I/O resources, features a simple communication protocol, and offers strong compatibility—making it especially suitable for resource-constrained embedded systems. Users can quickly update images, configure parameters, and perform other functions through standard serial port commands.
Robust Image Retention Protection Mechanism:The product documentation clearly recommends that when using a normally black panel, fixed patterns should not be displayed for extended periods. If static content is required, the display content should be refreshed at least once every two minutes. Additionally, it is strongly recommended to use a black image or a moving image as a screensaver to effectively extend the display’s lifespan and enhance product reliability.
Clear Structure for Easy Integration:The product specifications include detailed pin definitions (CN1 and CN2), such as +5V power supply, TXD, RXD, GND, etc., facilitating hardware connections and debugging. The module features a well-designed structure compatible with various mounting methods, making it suitable for mass production and maintenance.
Technical Q&A
Q1:This product supports UART communication. Does it support daisy-chaining multiple devices?
A: The UART interface on this Smart LCD Display is designed for standard point-to-point communication, typically connecting directly to a host MCU. If multiple devices need to be cascaded, this can be achieved by expanding multiple UART ports on the host controller or by using a serial port expander (such as a UART hub). The module itself does not have built-in address recognition or cascading protocols, but multi-screen management can be implemented through external control logic in system design.
In applications where multiple display modules need to work together, it is recommended that the host device control the TXD/RXD pins of each module separately, or adopt a serial port expansion solution with chip select functionality.
Q2:How can display stability be ensured during long-term operation of this module?
A: The HTM-H078A02-UART-A01C Smart LCD Display uses industrial-grade components in its hardware design, supports a wide voltage supply (+5V), and offers good anti-interference capabilities. At the software level, developers are advised to follow these principles:
- Regularly refresh display content to avoid static images remaining on screen for more than two minutes;
- Activate black or moving screensavers during standby;
- Avoid frequent power cycling, and maintain stable power supply and communication timing.
Additionally, the product undergoes rigorous display testing and aging verification before shipment, ensuring long-term stable performance under recommended usage conditions. For use in extreme environments (e.g., high temperature, high humidity), appropriate heat dissipation and protective measures are recommended.
