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1.54 Inch Square LCD Panel 240x240, SPI MCU, IPS TFT Display Modules
The 1.54 Inch Square LCD Panel is a compact 240x240 TFT display with SPI/MCU interface, IPS wide view and 300 nits brightness, designed for smart home, wearable and IoT devices. RONDELI supports optional capacitive touch, custom cover lens and interface configuration to match different product designs.
- 240x240 resolution on a 1.54 inch square screen for clear icons and UI elements.
- IPS full viewing angle and 300 nits brightness for indoor smart home and instrument panels.
- 4-line SPI / 8-bit MCU interface for easy integration with common microcontrollers.
- Optional capacitive touch and cover lens available for OEM and private-label projects.
Share your target application, quantity and interface requirements to get a tailored quotation and sample options.
A compact 1.54 inch square LCD panel for smart home, wearable and IoT interfaces
The 15401-240240ST is a 1.54 inch square LCD panel with 240x240 resolution, 4-line SPI / 8-bit MCU interface and IPS technology, designed for smart home controls, wearable devices and compact IoT instruments. With 300 nits brightness, normally black mode and optional capacitive touch, this square TFT display supports custom cover lens and interface configuration to match different product designs.
Why this 1.54 inch square LCD panel matters
Square screens provide a balanced layout for icons, menus and status information in compact devices. The 1.54 inch square LCD panel combines moderate resolution, low-power interface and wide viewing angle in a small outline, making it suitable for battery-powered and space-constrained applications.
- 240x240 resolution on a 1.54 inch diagonal delivers clear text, icons and simple graphics.
- IPS technology ensures consistent color and contrast from multiple viewing angles.
- 300 nits brightness is sufficient for indoor smart home panels and handheld instruments.
- SPI/MCU interface simplifies integration with common microcontrollers and reduces pin count.
How the SPI/MCU interface and square TFT work
SPI (Serial Peripheral Interface) and 8-bit MCU interfaces are widely used in small and medium-size TFT modules. They allow a single controller to drive the display with relatively simple wiring and low power consumption.
- 4-line SPI mode reduces signal lines while maintaining good update performance for UI elements.
- 8-bit MCU interface provides a parallel option for systems that prefer MCU-style timing.
- Normally black mode improves perceived contrast and reduces light leakage in dark themes.
What to check before buying a square LCD panel
When selecting a square LCD for a project, the key parameters are size, resolution, interface, brightness and mechanical fit.
- Confirm the available installation space against the module outline (31.5 × 35.0 × 1.91 mm) and active area (27.72 × 27.72 mm).
- Match the SPI/MCU interface and pin definition with your mainboard; custom FPC length and connector can be arranged.
- Decide if you need a bare module or a solution with capacitive touch and cover lens already bonded.
- Check the operating temperature range (-20°C ~ +70°C) against your target application environment.
Key specifications of the 1.54 inch square LCD panel
| Item | Specification | Unit |
| LCD screen size | 1.54 | inch |
| Display Mode | Normally Black | – |
| Resolution | 240 × (RGB) × 240 | Pixel |
| Pixel arrangement | RGB Vertical Stripe | – |
| Viewing angle | Full Viewing (IPS) | – |
| LCM Module Outline | 31.5 (W) × 35.0 (H) × 1.91 (T) | mm |
| LCD AA | 27.72 (W) × 27.72 (H) | mm |
| Display Colors | 16.7M | colors |
| Driver IC | ST7789T3 | – |
| LCD Interface | 4-Line SPI / 8-Bit MCU | – |
| Luminance | 300 | cd/m² |
| Backlight Arrangement | White LED | – |
| Capacitive Touch Panel | Optional PCAP | – |
| Touch Point | Multi-point | – |
| Touch Structure | Glass | – |
| Touch Interface | IIC | – |
| Cover Lens | Glass | mm |
| Surface Hardness | ≥ 6H | – |
| Cover Lens Colors | Black | – |
| Operating Temperature | -20 ~ +70 | °C |
| Storage Temperature | -30 ~ +80 | °C |
Customization options for square LCD projects
RONDELI supports OEM and ODM customization on this 1.54 inch square LCD panel to help customers integrate the display into their own smart home, wearable and IoT products.
- Touch panel: optional capacitive touch with IIC interface; cover lens thickness and shape can be adjusted.
- Interface: SPI/MCU pin definition, FPC length and connector type can be tuned to match customer mainboard.
- Branding: custom logo on cover lens or flexible cable for private-label devices.
- Testing: additional reliability tests (temperature cycling, drop, ESD) can be arranged according to project requirements.
For deep customization (different outline, special optical bonding, unique driver IC or brightness level), RONDELI can evaluate feasibility based on target quantity and development timeline.
Typical applications of the 1.54 inch square LCD panel
This square TFT display is suitable for compact, symmetric interfaces in smart home, wearable and industrial devices.
- Smart home: control panels, smart thermostats, gateway devices with small square screens.
- Wearables and portable devices: compact UI on handheld gadgets, fitness and health monitors.
- Consumer electronics: square display modules for promotional devices and branded IoT products.
- Industrial and medical: small square indicators on handheld instruments and wearable monitoring devices.
Case example: square display for a smart home control panel
A smart home solution provider was developing a wall-mounted control panel with a compact square display.
Buyer Requirement: The buyer needed a 1.5–1.6 inch square LCD with at least 240x240 resolution, low-power interface and stable operation in indoor environments.
Solution: RONDELI recommended the 15401-240240ST 1.54 inch square LCD panel with 240x240 resolution, SPI/MCU interface and 300 nits brightness. A custom cover lens with logo printing was added to match the panel design.
Result: The final module provided clear menus and status icons, easy integration with the customer's MCU, and reliable performance in long-term indoor operation.
Frequently asked questions about this 1.54 inch square LCD panel
Q1: What is the resolution of this 1.54 inch square LCD panel?
The display has a 240 × (RGB) × 240 resolution, which is suitable for clear text, icons and simple graphics on a 1.54 inch diagonal.
Q2: Can this square TFT display work with my existing MCU board?
In most cases, yes. RONDELI can adjust SPI/MCU pin definition, FPC length and connector type to match your mainboard. Please share your board requirements for confirmation.
Q3: Is capacitive touch available for this 1.54 inch square LCD module?
Yes, an optional capacitive touch panel with IIC interface and multi-point support is available. Cover lens thickness, hardness and surface treatment can be customized.
Q4: What is the typical lead time for samples and mass production?
Sample lead time is usually around 2–3 weeks, depending on configuration. Mass production lead time is negotiated based on order quantity and customization level.
Q5: Can RONDELI support small MOQ for pilot projects?
Yes, RONDELI can support pilot orders for evaluation. Target MOQ and pricing will depend on the chosen configuration and any custom requirements.
About RONDELI Display
RONDELI Display is a manufacturer of TFT LCD modules, square LCD panels and touch solutions for smart home, wearable and industrial applications. The company focuses on long-term supply, stable quality and engineering support for OEM and ODM projects. Products are shipped to customers in Europe, America, Asia and other regions, with support from initial selection to mass production.
Request a quote for the 1.54 inch square LCD panel
For OEM inquiries on this 1.54 inch square LCD panel, providing the following details helps speed up the quotation process:
- Target application (smart home, wearable, IoT, industrial device, etc.)
- Required interface (SPI or MCU) and touch configuration (with or without cover lens)
- Estimated annual quantity and any custom branding or packaging needs
Samples are available prior to bulk order confirmation, with a typical lead time of approximately 2–3 weeks.
