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1.54 Inch Square LCD Panel 240x240, SPI MCU IPS TFT LCD Display Touch Screen
The 1.54 Inch Square LCD Panel is a compact 240x240 SPI/MCU IPS display with normally black mode and capacitive touch, designed for smart medical instruments, wearables and IoT devices. As a versatile TFT LCD Module, it supports custom cover lens and interface configuration, making it suitable for High Brightness LCD applications in bright indoor environments.
- 240x240 resolution on a 1.54 inch diagonal for clear icons, status info and simple UI.
- 4-line SPI / 8-bit MCU interface and IPS full-view technology for easy integration and wide viewing angles.
- 300 nits brightness and normally black mode support use as a High Brightness LCD in bright rooms.
- Capacitive touch with IIC interface and glass structure for reliable interactive operation.
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 medical, wearable and IoT interfaces
The 15401-240240ST-TP is a 1.54 inch square LCD panel with 240x240 resolution, 4-line SPI / 8-bit MCU interface and IPS technology, designed for smart medical instruments, wearables and IoT devices. As a compact TFT LCD Module with capacitive touch and normally black mode, it can be configured as a High Brightness LCD solution with custom cover lens and interface to match different product requirements.
Why this 1.54 inch square LCD panel matters
In smart medical, wearable and IoT devices, screens must be small, low-power and easy to integrate while still providing clear text and simple graphics. The 1.54 inch square LCD panel combines moderate resolution, common driver IC and simple SPI/MCU interface in a compact outline suitable for battery-powered and space-constrained products.
- 240x240 resolution on a 1.54 inch diagonal provides clear menus, status lines and basic UI elements.
- Square format fits symmetric layouts in wearables, smart knobs and compact instrument panels.
- 300 nits brightness and normally black mode support use as a High Brightness LCD in bright indoor areas.
- SPI/MCU interface simplifies integration with common microcontrollers and embedded systems.
How the SPI/MCU interface and touch system work
The 4-line SPI 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. The capacitive touch layer uses an IIC interface to communicate with the host controller, enabling smooth touch interaction on top of the TFT LCD Module.
- 4-line SPI mode reduces signal lines while maintaining good update performance for text and simple graphics.
- 8-bit MCU interface provides a parallel option for systems that prefer MCU-style timing.
- Capacitive touch with CST816D IC supports single-point touch and gestures for intuitive operation.
What to check before buying a 1.54 inch TFT LCD Module
When selecting a 1.54 inch display for a project, the key parameters are resolution, interface, mechanical fit and touch requirements.
- Confirm the available installation space against the LCM outline (31.5 × 35.0 × 1.91 mm) and TP+module outline (35.7 × 39.7 × 3.08 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 TFT LCD Module or a complete touch solution with 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 |
| TP-Module Outline | 35.7 (W) × 39.7 (H) × 3.08 (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 | Option PCAP | – |
| Touch IC | CST816D | – |
| Touch Point | Single-point + Gesture | – |
| 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 1.54 inch TFT LCD Module 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 medical, wearable and IoT devices.
- Touch panel: PCAP with IIC interface and single-point + gesture support.
- Cover lens: custom thickness, shape and logo printing for branded devices.
- Interface: SPI/MCU pin definition, FPC length and connector type can be tuned to match customer mainboard.
- Testing: additional reliability tests (temperature cycling, drop, ESD) can be arranged according to project requirements.
For deep customization (different outline, special optical bonding, unique brightness level or driver IC), RONDELI can evaluate feasibility based on target quantity and development timeline.
Typical applications of the 1.54 inch square LCD panel
This compact 1.54 inch TFT LCD Module is suitable for symmetric interfaces in smart medical, wearable and IoT devices.
- Smart medical: portable diagnostic devices, therapy equipment and monitoring modules with small square displays.
- Wearables and IoT: smart knobs, wearable controllers, IoT gateways and handheld gadgets requiring a compact UI.
- Consumer and industrial: promotional devices, educational kits and light industrial instruments where a High Brightness LCD is preferred.
- Other equipment: any application that needs a small square touch display with SPI/MCU interface.
Case example: High Brightness LCD for a smart medical instrument
A medical device manufacturer was developing a compact smart instrument that required a small square display with touch.
Buyer Requirement: The buyer needed a 1.54 inch display with at least 240x240 resolution, simple SPI/MCU interface and stable operation in bright indoor clinical environments.
Solution: RONDELI recommended the 15401-240240ST-TP 1.54 inch square LCD panel with 240x240 resolution, SPI/MCU interface and capacitive touch. A custom cover lens with logo printing was added to create a compact High Brightness LCD solution for the instrument.
Result: The final module provided clear status and parameter screens under hospital lighting, simple integration with the customer's MCU, and reliable performance in long-term clinical use.
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 icons, status info and simple UI on a 1.54 inch diagonal.
Q2: Can this TFT LCD Module work with my existing SPI/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: What kind of touch does this 1.54 inch LCD module support?
The module uses a capacitive touch panel with CST816D IC, supporting single-point touch and gestures via an IIC interface.
Q4: Is this display suitable as a High Brightness LCD for bright rooms?
With 300 nits brightness and normally black mode, this module can serve as a High Brightness LCD in bright indoor medical and industrial environments.
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 Module products, High Brightness LCD solutions and small square displays for smart medical, wearable and IoT 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 medical instrument, wearable, IoT 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.
