1.44-inch Square LCD Display Module

 

ENH-TV0144006A Description

 

The 1.44-inch square LCD module has secured its place in compact display applications for solid, practical reasons-not just spec numbers. Packing 128×128 resolution into a perfect 1:1 square ratio, it strikes a balance between sharp visuals and spatial efficiency that rectangular displays simply can't match. Many customers initially prefer long, narrow screens for wearables or handhelds, only to realize after prototyping that the square format delivers far cleaner layouts for circular watch faces, symmetrical UIs, and status icons without awkward cropping or wasted space. Whether you're developing a kids' smartwatch, a medical handheld, or an industrial control panel, this module performs reliably in real-world designs.

Our 1.44-inch square LCD is built around the ST7735S driver IC, supporting 4-wire SPI and MCU parallel interfaces, with a stable operating temperature range of -20°C to +70°C-one we've rigorously tested across mass production runs. At just 2.25mm thick and under 5 grams, it adds barely noticeable weight or bulk to slim devices, yet fully supports full-color graphics without compromise.

With 128×128 pixels on a 1.44-inch diagonal, the module reaches roughly 125 PPI, sharp enough for small text, icons, and graphics at typical viewing distances of 30 to 50 cm. But the real value of the 1:1 aspect ratio reveals itself in application: no forced stretching for round watch dials, balanced horizontal and vertical layout for indicators, and a naturally tidy visual structure that makes UI design far more intuitive.

The ST7735S is a workhorse driver we've relied on for years-mature, well-documented, and widely supported in both maker and industrial communities. Beyond the standard 4-wire SPI, it also works with 3-wire SPI and 8/16-bit MCU parallel interfaces. The 4-wire SPI setup uses only five pins (CS, DC, MOSI, SCK, RESET), making it ideal for designs where I/O resources are tight-a key reason clients consistently request this configuration.

 

The display is optimized for 12-o'clock viewing (U70/D60/L70/R70), meaning it performs best when viewed from slightly above, which works beautifully for eye-level or downward-mounted panels. For applications demanding wide-angle visibility, we offer IPS variants-something we always discuss with clients early in design to avoid visibility issues later.

Powered by a single 2.8V–3.3V supply, the module draws just 15–20 mA for logic and 40–60 mA for the backlight at full brightness. The backlight uses a single white LED with integrated current limiting and supports PWM dimming, allowing fine balance between screen brightness and battery life in portable designs.

 

In real deployed projects, this module fills roles that go beyond generic "application lists". It's become a de facto standard for kids' smartwatches and basic fitness trackers, where 128×128 resolution easily handles time, steps, heart rate, and notification icons, while its ultra-light weight ensures all-day wearing comfort.

For medical devices-glucose meters, pulse oximeters, blood pressure monitors, and ECG handhelds-the low weight and low power draw are critical for portability. Industrial handheld testers, calibrators, and HMI pendants depend on its -20°C to +70°C temperature tolerance to stay usable in factory and field conditions.

Smart home thermostats, air quality monitors, small appliance controls, remote controls, and compact POS terminals all use its small footprint to save critical internal space. For makers and educators, its plug-and-play compatibility with Arduino, ESP32, STM32, and Raspberry Pi-paired with libraries like Adafruit GFX-makes prototyping fast and accessible, keeping it popular in hobby and STEM projects.

 

From a manufacturer's and engineering perspective, the strength of this 1.44-inch square module lies in practical usability, not just datasheet figures.

The square form factor fully utilizes the front area in square enclosures, unlike rectangular panels that leave gaps. In wearables, where every millimeter counts, this spatial efficiency directly improves design compactness. The ST7735S's robust ecosystem and minimal pin count simplify development and PCB routing, freeing up pins for sensors, radios, or batteries, while 65K/262K color support ensures vibrant, clean UI rendering.

Its sub-5g weight and 2.25mm profile come from refined structural and backlight design-slim, but durable enough to withstand assembly and drop tests. The wide operating and storage temperature ranges (-30°C to +80°C storage) make it suitable for outdoor and harsh environments.

Low power draw and microamp-level sleep current extend battery life in portable devices. Multiple interface options let it work with nearly any main controller without redesign. The module is fully RoHS compliant for global markets, and customizable in FPC, touch, cover glass, and brightness-though custom variants start at 1,000 units, a balance we've found works best for both prototyping and mass production.

 

Mechanically, the standard module uses a 26-pin 0.5mm pitch FPC with gold-plated pads and stiffener, defaulting to bottom-center exit with side-exit options. It's designed for ZIF connectors to streamline high-volume assembly. The backlight uses one white LED at 300–500 cd/m² with an integrated current-limiting resistor; higher-brightness multi-LED setups are available.

Outer dimensions are 34.41 mm × 29 mm × 2.25 mm, with a centered active area of 25.50 mm × 26.50 mm. We include complete 2D mechanical drawings with every sample shipment to simplify enclosure integration. The polarizer comes standard with anti-glare coating to reduce reflection in bright environments, with a glossy finish available for applications where crispness is prioritized. ESD protection reaches 8KV air discharge, guarding against electrostatic damage during production and use-especially important for industrial and medical clients.

Our factory holds ISO9001:2015 and ISO14001:2015 certifications, with full compliance to RoHS and REACH. Consistent quality control from raw materials to finished goods ensures stable long-term supply.

 

As a direct manufacturer, our customization service is rooted in real project experience, not just parameter changes. We can adjust FPC length (15–150mm), exit direction, connectors, and mounting holes, with tooling taking 3–4 weeks. Touch options include capacitive (FT3267/CST826) or resistive, with optical bonding or air gap. Cover glass can feature AG, AF, or printed logos. Brightness can be boosted to 1000 cd/m² for sunlight readability. We also extend temperature ranges and modify interfaces upon request, always evaluating impacts on thickness, cost, and lead time upfront to keep clients from unnecessary design detours.

 

 ● OEM&ODM             ● NO MOQ                ● SAMPLES IN STOCK              ● TESTING BOARD OPTIONAL

 

 

 

 

                                                           

 

 

 

SPECIFICATIONS

ITEM	DIMENSION	UNIT
Size	1.44	inch
Outline Dimention	34.41x29x2.25	mm
Operating Temperature	-20°- +70°	°C
Storage Temperature	-30°- +80°	°C
Resolution	128x128

 

 

 

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