Description
Product Introduction
The HOTHMI HTM-H015A05-SPI-V0 is a 1.47-inch TFT Round Screen liquid crystal display module specifically engineered for industrial control, smart wearables, and portable devices. This Round Screen solution incorporates advanced normally black panel technology with IPS full-viewing-angle design, ensuring clear, color-accurate visual quality from every viewing angle. At the core of this module lies the high-performance ST77916 driver chip, which delivers 360×3RGB×360 high-definition resolution within a compact circular form factor, complemented by NTSC 70% wide color gamut performance for vivid, saturated, and lifelike imagery. To accommodate diverse application environments, this Screen supports 500 cd/m² typical high-brightness output, maintaining excellent visibility even under intense indoor lighting or semi-outdoor conditions.
In terms of interface and electrical characteristics, the Round Screen module integrates a built-in drive circuit, supports a wide operating voltage range of 3.0V to 3.3V, and connects to the host controller via a streamlined 4-wire 8-bit serial interface, significantly simplifying hardware circuit design and saving board space. Engineered for demanding industrial requirements, this Round Screen offers exceptional temperature tolerance, with an operating temperature range of -20°C to +70°C and a storage temperature range of -30°C to +80°C, ensuring stable operation under extreme conditions. The module features a precision compact structure, with a PCB outer diameter of 43.00mm, a thickness of only 1.60mm, and a low-profile 5.60mm header connector, facilitating quick and secure integration into various space-constrained devices.
Product Highlights
- True Round Screen Structure: Featuring a 1.47-inch perfectly circular display area with 360×3RGB×360 high-definition resolution. The fine pixel arrangement makes this Round Screen an ideal platform for developing dynamic watch faces, circular progress bars, and gauge clusters.
- IPS Full-Angle Viewing: Built with normally black IPS panel technology, this Screen delivers ultra-wide viewing angles of U85/D85/R85/L85. The display maintains true-to-life colors without distortion or gray-scale inversion from any perspective.
- High Brightness and Wide Color Gamut: With typical brightness of 500 cd/m² and NTSC 70% color gamut coverage, this Round Screen produces vivid, saturated colors that remain clearly visible even under strong ambient light or direct sunlight.
- Wide-Temperature Industrial-Grade Reliability: Designed for harsh environments, this Round Screen operates reliably from -20°C to +70°C and can be stored from -30°C to +80°C, ensuring long-term stability in both freezing cold and scorching heat conditions.
- Thin and Space-Saving Architecture: The module has a PCB thickness of just 1.60mm, with an integrated 5.60mm low-profile horizontal header connector on the back, dramatically reducing vertical stacking height for slim smart terminal designs.
- Efficient and Simple Interface Control: Utilizes a standard 4-line 8-bit serial interface. This Screen requires minimal host MCU I/O resources while achieving high-speed screen refresh rates, making it perfectly compatible with STM32, ESP32, Arduino, and various low-power MCUs.
Pin Description
The Round Screen module routes control and power signals through onboard connectors (including CN1 and CN2 logical areas).
Product Applications
Leveraging its technologically appealing circular aesthetic and robust industrial-grade environmental performance, this Round Screen LCD module finds broad applications across multiple vertical markets:
- Smart Wearables and Health Monitoring: Widely adopted in premium smartwatches, fitness bands, and adult/children positioning watches, delivering dynamic UI and health monitoring data with exceptional clarity on the Round Screen.
- IoT and Smart Home Control Knobs: Integrated into smart thermostat panels, high-end audio rotary controls, smart wall switches, and built-in kitchen appliances as the core interactive Round Screen interface for touch(this product supports custom touch screen options) or rotary control.
- Industrial Instrumentation and Automation: Used to replace traditional analog gauges, integrated into digital pressure meters, multifunctional electronic multimeters, automotive digital flow meters, and various handheld industrial testing and inspection devices featuring Round Screen displays.
- Micro Two-Wheeled Vehicle Dashboards: Deployed as compact instrument clusters for e-bikes, high-end road bicycles, and electric scooters, displaying real-time speed, battery level, and navigation arrows on the Round Screen.
Technical FAQ
Q1: Can this Round Screen module be directly connected to a 5V-logic microcontroller such as a traditional Arduino UNO?
A: Absolutely not. The recommended operating voltage VCI and all I/O pin logic levels for this Round Screen module are strictly within the 3.0V to 3.3V range. Direct connection to 5V TTL-level microcontrollers will inject excessive voltage, which can easily damage or destroy the internal ST77916 driver chip of the Round Screen module. If you must interface with a 5V microcontroller, you are required to connect bidirectional level shifter ICs in series on the SPI signal lines (such as SCL, SDA, CS) to safely convert 5V logic down to 3.3V levels.
Q2: What is the physical structure of this Round Screen product? Does it support custom-shaped cover lenses?
A: The Round Screen module features an extremely precise mechanical design. The active display area measures 37.30mm in diameter, while the underlying PCB dimensions are 43.00mm × 42.42mm. This structure conveniently allows customers to customize larger, thicker, or circular/irregular protective glass cover lenses with branded logos or silk-screening around the periphery during product enclosure design. The cover lens can be bonded to the front of the Round Screen module using 3M adhesive or dispensing techniques, achieving IP67-level dust and water resistance while significantly enhancing overall device aesthetics.
From minor concept tweaks to full custom redesign & development, our engineering team offers end-to-end technical support. Feel free to contact us for custom display demands or technical issues during product selection.
