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