Solutions & Guides

Small TFT LCD Modules (0.96–3.5 inch): A Selection & Interface Guide

Below 3.5 inches, every milliwatt and every millimetre counts. This guide covers the decisions specific to small TFT LCD modules — resolution density, interfaces and driver ICs — for wearables, portable instruments and compact HMI.

Where Small Displays Win

When the UI is a status readout, a menu tree or a numeric cluster, a small TFT beats a character LCD on flexibility and beats a larger panel on cost, power and mechanical simplicity. Typical homes: medical handhelds, test instruments, smart meters, compact POS and IoT panels.

Resolution and Pixel Density at Small Sizes

Pixel density climbs fast at small sizes: a 0.99-inch round panel at 128×115 is already around 150 PPI. Two rules: pick the resolution your UI font actually needs (small text needs real pixels, not scaled ones), and prefer standard resolutions (160×128, 320×240, 480×320) so driver support and reference code are proven.

Interface Options: SPI, MCU and RGB

Interface	Typical use	Notes
SPI	MCU-based, low pin count	Slowest refresh, fewest pins — wearables
MCU 8080 parallel	Embedded MCUs	Balanced speed and pin count
RGB	Streaming video, SoC platforms	Highest refresh, needs continuous drive

Driver IC and Power Budget

ST7735 / ST7789 / ILI9341-class drivers dominate this segment and have mature open-source support. Budget the backlight separately: it usually dominates system power, so a PWM-dimmable backlight pays for itself in battery products. Our small-size lineup spans 0.96 to 3.5 inches — linked below.

Matching RONEN Standard Models

These part numbers from our catalog match this guide — each is a standard model with full factory specs and a one-click datasheet request:

RG-T009HESA-01 — 0.96″ 80x160 IPS, 200 cd/m²
RG-T010BCSA-01 — 0.99″ 128x115 IPS Round, 350 cd/m²
RG-T013HQGA-01 — 1.3″ 240x240 IPS Round, 500 cd/m²
RG-T013BQSA-01 — 1.3″ 240x240 IPS Square, 350 cd/m²
RG-T015BOSA-01 — 1.54″ 320x320 IPS Square, 380 cd/m²
RG-T0177SSI-02 — 1.77″ 128x160 TN, 220 cd/m²
RG-T020BQSA-01 — 2.0″ 240x240 IPS, 250 cd/m²
RG-T020BLIA-01 — 2.0″ 320x240 IPS, 250 cd/m²

Request Datasheet & Quote Browse All 190+ Models

Choosing a Small TFT (0.96 to 3.5 Inch)

The 0.96 to 3.5 inch band covers wearables, handheld instruments, and compact control surfaces. The decision is less about pixels and more about interface, power, and how the user reads the screen at short distance.

Interface and host fit

SPI and I2C dominate the smallest sizes to save pins; MCU-8080 or RGB appear as the panel grows and the UI needs faster redraws. Pick the interface your microcontroller already supports before chasing a higher refresh.

Brightness, touch, and lifecycle

Indoor small panels around 300 to 500 cd/m2 are typical; add more only if the device faces bright light. Resistive touch suits gloves, capacitive suits bare-finger UIs. Because these parts sit in long-lived products, RONEN keeps selected small standards in production beyond 5 years and documents continuity in writing.

Sampling before production

Validate the module against your firmware and enclosure on a sample first; a short check catches interface or mounting mismatches before a full build and keeps the program on schedule.

Frequently Asked Questions

What sizes count as small TFT LCD modules?

Roughly 0.96 to 3.5 inch diagonals, covering wearables, handheld instruments, and compact control surfaces.

Which interface should a small TFT use?

SPI or I2C at the smallest sizes to save pins; MCU-8080 or RGB as the panel grows and the UI needs faster redraws.

How bright should a small TFT be?

Indoor panels around 300 to 500 cd/m2 are typical; add more only if the device faces bright or outdoor light.

How long will small standard models stay available?

RONEN keeps selected small standards in production beyond 5 years and confirms continuity in writing for long-life programs.