1.47 Inch 172x320 IPS TFT LCD Screen ST7789 4-SPI 12 Pin 600 Nits Wearable Display Module

At 1.47 inch, resolution starts to matter more than area. This module carries 172x320 pixels on a 17.3892 x 32.352 mm active area with a 0.0337 mm horizontal subpixel pitch, fine enough that small type renders without stair-stepping. The cell is IPS, both electrodes on one substrate, so colour and contrast hold across a full viewing cone rather than a narrow sweet spot. Two or three white LEDs light it, and each transistor holds its charge so only changed content is rewritten. The ST7789 controller integrates the gate and source drivers, the timing and the RAM, and it is offered here in two builds: a 12 pin 0.7 mm solder version at 600 nits and an 8 pin 0.5 mm plug-in version at 350 nits, so one design can serve a bright outdoor product and an indoor one.

Smart meters show a consumption figure and a tariff band. Wearables show a notification and a time. Handheld instruments show a measurement and its unit. Bike computers show speed and cadence. Medical monitors show a saturation and a trend. Each enclosure is narrow with a lens window, where a 172x320 strip gives five or six rows under 2 cm wide.

Density is the first advantage: at this pixel pitch a 12 point label still reads cleanly, so the same window carries more information than a 128x160 panel of similar width. The second is the dual build: the same drawing supports a 600 nit outdoor variant and a 350 nit indoor variant, which halves qualification work for a product family. The third is the 2.5 to 3.3 V supply, which runs directly from a lithium cell without a boost converter. And the 1.46 mm outline leaves room for a cover glass inside a slim housing.

The module renders text, icons, gauges and 65K colour graphics, accepts 4-SPI data, supports windowed partial refresh for a single changing value, and exposes backlight control for dimming. The ST7789 also provides vertical scroll and partial display modes, so a host can scroll a log or blank unused rows to save backlight power without rewriting the frame.

Commissioning sequence: apply the supply within 2.5 to 3.3 V, release reset, load the ST7789 table for 172x320, define the address window, stream RGB565 data, then enable the backlight. When switching between the solder and plug-in builds, verify the pin map, since the two connectors use different pin counts and a firmware written for one will leave the other blank.

Stay inside 2.5 to 3.3 V and never drive the LED string past its rated current, because the 600 nit build carries more LEDs than the 350 nit one and a resistor chosen for the dim variant will overdrive the bright one. Keep within -20 to +70 C, protect the 0.5 mm plug-in tail from repeated insertion, and avoid point loads on the glass near the FPC bond.

Shipping takes 5-10 working days after payment. Samples go by express for enclosure trials, volume by air or sea, with monthly capacity around 100,000 pieces.

T/T, L/C at sight and Western Union are accepted; samples are prepaid and production follows a deposit plus balance against shipping documents.

Panels ship with protective film, in anti-static trays with foam inserts, sealed in a moisture barrier bag inside an export carton labelled per build and quantity.

Minimum order is 10 pieces. Arrival damage is replaced after photo confirmation, the 12 month warranty covers defects, and our engineers confirm the pin map and the backlight resistor for the chosen build.