1.2 Inch Round Wearable AMOLED Display for Smartwatches

1.2 Inch Round Wearable AMOLED Display for Smartwatches

This 1.2-inch circular AMOLED module delivers a native 390 × 390 interface through a 1-lane MIPI connection for compact wearable designs.

Product Summary

The Round Wearable AMOLED Display is a compact circular panel for smartwatch faces, fitness interfaces and small wearable controls. Its 30.42 × 30.42 mm active area presents a square 390 × 390 raster inside a round visible format, supporting detailed icons, numeric data, status rings and menu graphics.

The panel is self-emissive, so it does not use the separate LED backlight found in a TFT LCD module. Its standard optical data includes 350 cd/m² typical luminance, a 10000:1 minimum contrast ratio and 16.7M-color capability.

Key Specifications

Circular UI and Optical Performance

Prepare the Native 390 × 390 Canvas

Create the interface at the native 390 × 390 resolution. A square framebuffer does not mean every corner remains visible within the circular display area. Keep critical text, notification symbols and touch targets within a defined circular safe zone.

Round progress rings, watch hands, fitness arcs and central numeric values use the geometry effectively. Rectangular menus should be tested for clipping before software release.

Qualify the 350 cd/m² Front-of-Screen Result

The 350 cd/m² typical luminance can support many indoor and moderate-ambient wearable applications. It does not guarantee daylight readability after adding a cover lens, touch layer, adhesive, anti-fingerprint coating or dark printed border.

Measure the finished optical stack under the intended lighting and viewing angle. Dark AMOLED interfaces can improve perceived contrast, but very bright full-screen content can change the power and thermal profile.

Round Wearable AMOLED Display Integration

Confirm the 1-Lane MIPI Configuration

The display interface is identified as MIPI with one data lane. The host must support the required lane operation, timing and display mode. MIPI support on a processor does not prove that the host configuration matches this particular panel.

Confirm whether the module uses command mode, video mode or another defined operating sequence. Obtain the complete timing and initialization package before firmware release.

Verify the Entire 24-Pin Assignment

A matching 24-pin connector does not guarantee compatibility. Verify:

• Connector pitch
• Contact side
• Cable orientation
• Lane polarity
• Clock signals
• Ground allocation
• Reset and control lines
• Power rails
• Any test or reserved pins

The mating connector and mechanical keep-out area should be included in the enclosure review.

Keep W022 Within Its Documentation Boundary

W022 identifies the built-in ASIC associated with this module. It does not establish universal commands, timing, gamma values, sleep behavior or power sequencing.

Use the exact command table and initialization package for the production revision. Similar-looking 390 × 390 AMOLED panels may use different controllers or firmware requirements.

Power and Self-Emissive Design

Confirm Every Rail and Its Sequence

The available parameter table identifies typical rails of 1.8 V, 3.3 V, 3.3 V and −3.3 V for the named power domains. Confirm the exact mapping to VDDIO, VCI, ELVDD and ELVSS before schematic release.

The design review should also cover:

• Rail tolerance
• Startup sequence
• Shutdown sequence
• Reset timing
• Current demand
• Decoupling
• Sleep-state behavior

Budget Power by Display Content

AMOLED pixels emit their own light. Power demand therefore varies with image content, luminance and active-pixel area. A dark watch face and a high-white-area interface may produce different current and thermal conditions.

Evaluate representative watch faces, notifications and animations rather than relying on one static test image.

Mechanical Integration

Separate Active Area from Panel Outline

The active image area is 30.42 × 30.42 mm, while the panel outline is 33.22 × 34.72 × 0.76 mm. Use the active area for the visible opening and the complete outline for enclosure clearance.

The bottom connection area extends beyond the ideal circular image geometry, so the enclosure must provide space for the flex route and connector assembly.

Protect the Thin AMOLED Stack

The 0.76 mm panel thickness supports compact wearable construction but requires controlled support. Avoid twisting, point loading and uneven adhesive stress.

Review:

• Support surfaces
• Cover-lens gap
• Adhesive thickness
• Connector insertion clearance
• FPC bend radius
• Assembly tolerance
• Edge protection

Optional Touch Configuration

Do Not Treat Touch as Standard

Touch is identified as optional. The standard display should not be presented as an integrated touch module unless the ordered configuration includes a documented touch panel.

A touch version requires separate confirmation of:

• Touch technology
• Controller IC
• Communication interface
• Pin count
• Touch points
• Cover-lens construction
• Optical transmission
• Combined thickness
• Mechanical outline
• Operating-system support

Application and Qualification Boundaries

This Round Wearable AMOLED Display can be evaluated for smartwatches, fitness trackers, compact wearable controls, circular status interfaces and small embedded instruments.

The component temperature ranges do not establish waterproofing, sweat resistance, drop resistance, vibration qualification, UV durability, automotive grade or medical-device certification. Those requirements must be validated at the complete-device level.

Customization and Procurement Checklist

Customization Scope

Logo, packaging and graphic customization are indicated from 300 pieces. FPC definition, connector changes, cover-lens design, optical treatment, touch development and mechanical adaptation require separate engineering and MOQ review.

Confirm Before Sample Approval

Submit:

• Assigned model HS0120AMOLED-01
• Supplier model X120BLN02
• Native 390 × 390 timing
• MIPI lane count and operating mode
• Complete 24-pin pinout
• Connector orientation and mating part
• W022 initialization package
• Exact power-rail map and sequence
• Circular UI safe-area design
• Enclosure and cover-lens drawings
• Standard no-touch or touch requirement
• Operating environment
• Sample quantity
• Annual demand