Wearable & TWS Display Modules for charging cases, watches and bands
PMOLED from 0.42" to 0.71" for TWS charging cases and round AMOLED 1.2" 390×390 / 1.39" 454×454 for smartwatches — with µA-level standby, sub-1 mm stacks and custom round or notch cutting from a single Shenzhen line.
A watch face and a case display share one rule: every milligram and every milliamp counts
Wearable displays come in two very different jobs. A TWS charging case needs a tiny status screen — 0.42" to 0.71" PMOLED that sips single-digit microamps between charges. A smartwatch needs a round 1.2" 390×390 or 1.39" 454×454 AMOLED with true blacks that still wakes in daylight. We build both on the same line, with the same yield discipline.
- 0.42"–0.71" PMOLED for TWS cases — the 0.71" 48×64 panel is one of the smallest production OLEDs; SPI or I2C, with µA-level static draw.
- Round AMOLED 1.2" 390×390 and 1.39" 454×454 — MIPI / SPI / QSPI interfaces tuned for always-on watch faces.
- Sub-1 mm module stacks — slim enough for watch bodies under 9 mm total thickness.
- Round, notch and hairline cutting — custom shapes for sensors, buttons and microphone openings.
Where wearable displays fail — and how we answer
Eight failure modes from wearable programs we have shipped, each paired with the response engineered into our OLED line. Every one is a measured gap with a numeric answer.
| Pain Point | The Cost | EMS-Display Response |
|---|---|---|
| 0.71" is the practical size floor | 48×64 PMOLED panels below 0.5 mm FPC pitch are hard to bond — yield losses drive up unit cost | COG assembly at 0.4 mm FPC pitch; line yield ≥99% sustained at 200K pcs/month |
| µA-level standby budget | 30–200 mAh case batteries cannot feed a display that idles in milliamps | PMOLED static draw <10 µA; AMOLED deep-sleep <5 µA with driver shutdown |
| Round die from rectangular glass | Cutting a 1.2" 390×390 circle wastes cell area and risks edge cracks | Round cutting at ±0.1 mm tolerance; notch and hairline options for sensors |
| Blue OLED aging | Blue sub-pixels fade fastest; always-on watch faces burn in within months at high brightness | Brightness management profiles and pixel-shift; 300–800 nits tuned to lifetime targets |
| Thickness race under 1 mm | Every 0.1 mm of module stack competes with battery and antenna space | Ultra-thin stacks below 1.0 mm with integrated FPC routing |
| FPC flex fatigue in hinges | Charging-case lids and watch straps flex the connector thousands of times | Dynamic-bend FPC validated to 50,000+ flex cycles before release |
| Temperature extremes in daily use | Cases bake at 60 °C on dashboards; watches run at -20 °C outdoors | -20~+70 °C operating grade with thermal-shock screening |
| High-mix, low-volume SKUs | Many watch models, modest volumes per model — tooling multiplies quickly | MOQ 500 pcs per SKU; samples in 7–15 days; shared FPC and driver platforms |
The wearable line, specified to the digit
Standard wearable-grade parameters with custom variants on demand. Quote these against your battery model, your watch body and your production plan.
| Parameter | Specification |
|---|---|
| Size range | 0.42"–0.71" PMOLED (TWS cases); 1.2"–1.39" round AMOLED (watches) |
| Resolution | 48×64 (0.71") up to 390×390 (1.2") and 454×454 (1.39") |
| Panel type | PMOLED / AMOLED, self-emissive — no backlight, true blacks |
| Standby power | <10 µA PMOLED static; <5 µA AMOLED sleep |
| Brightness | 80–120 nits PMOLED; 300–800 nits AMOLED with ambient boost |
| Interface | SPI · I2C · QSPI · MIPI DSI |
| Thickness | <1.0 mm module stack with integrated FPC |
| Shape | Round, notch, hairline and custom 2nd-cut formats |
| Touch | Wake-on-touch and touch-ring integration options |
| Temperature | -20~+70 °C operating; thermal-shock screened |
| Supply | MOQ 500 pcs; samples 7–15 days; 10-year guarantee option |
| Certifications | CE · FCC · RoHS · REACH |
What wearable programs report back
Customer types and the numbers they measured — standby draw, platform consolidation and yield at scale.
Our charging case display runs as a 0.71-inch round PMOLED on SPI. At 200K pcs a month the standby draw stayed inside our idle-budget spec — the case still tops up the earbuds three times per charge.
Three watch models now share one 1.2-inch 390×390 round AMOLED platform. Golden samples took 12 days, and the round-cut yield has held above 98% since ramp.
We swapped a 0.96-inch TFT for PMOLED and cut our always-on idle draw by roughly 60%, stretching claimed battery life by two days without a bigger cell.
Send your watch or TWS spec — we will return a power budget and a price.
Panel size, resolution, interface and annual volume. MOQ 500 pcs, samples in 7–15 days, production in 20–35 days, FOB Shenzhen or DDP — quoted within 48 hours.
