1.43-inch round AMOLED display module showing a sample image on screen with integrated on-cell touch.
1.43-inch 466×466 AMOLED Display $24.85piece
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Front view of a 1.2-inch 390x390 circular AMOLED display module on a white background.
1.2-inch Circular 390×390 AMOLED Display $37.10piece
circular AMOLED display image demo
round AMOLED display watch UI demo
circular AMOLED display back view
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circular AMOLED display image demo
round AMOLED display watch UI demo
circular AMOLED display back view

1.39-inch Circular AMOLED Display 454×454

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$24.80piece

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Description

Model: BO139A454SPI

The 1.39-inch Circular AMOLED Display is designed for modern smartwatch and wearable interfaces where sharp UI, vivid color, and low power matter. With a 454 × 454 resolution and 16.7M colors, it renders crisp icons, clean text, and smooth dial graphics in a compact round form factor.

Built for reliable system integration, this module supports MIPI / SPI connectivity and runs at a 45 Hz frame frequency (43–47 Hz) for stable everyday performance. It reaches 450 cd/m² (typ.) luminance and delivers a fine 326 PPI for clear detail on small screens. With an Active Area φ35.412 mm and a module outline ≤ φ42.0 mm in an ultra-thin 0.733 mm (max.) structure, it fits space-constrained wearable designs. The module adopts a COF structure and integrates the RM69330 driver IC. Electrical operation supports VDDIO 1.65–1.95 V (typ. 1.8 V) and VBAT 2.9–4.8 V (typ. 3.7 V), with typical power consumption of 260 mW at 100% on / 450 nits / 45 Hz.

Application

Smart Watch UI | Wearable Devices | Round Display Terminals | Embedded HMI | Test & Evaluation Fixtures

Customized Options

FPC  | Touch Panel | Cover Glass | Controller Board | Brightness

circular AMOLED mechanical drawing outline dimensions
circular AMOLED display view with controller board

HDMI Controller Board for Fast Bring-Up

To simplify evaluation and shorten your development cycle, Gesight can provide an HDMI Controller Board for this 1.39-inch circular AMOLED display. The board enables quick plug-and-play testing from common video sources, so you can verify brightness, color rendering, and UI sharpness on the real panel without building a full host system from day one.

Designed for lab bring-up and demo builds, the HDMI board helps streamline tasks like panel initialization, interface debugging, and performance checks during firmware tuning. It’s also ideal for customer demos, pilot runs, and production validation—letting your team focus on application UI and system integration instead of spending time on early-stage display driving.

Gesight provide HDMI Board for evaluation, prototyping, and integration support—ask for availability and a matching cable/adapter set for your setup.

Crisp Circular UI with Vivid AMOLED Rendering

This 1.39-inch circular AMOLED delivers a clean, high-end visual feel for wearable UIs, with sharp edges and smooth gradients across the round dial area. The 454 × 454 resolution and 326 PPI help fine text, icons, and ring-style widgets stay clear without jagged outlines—especially important for compact watch interfaces where every pixel matters.

With 16.7M colors, the panel renders rich tones and natural transitions, making watch faces, notification cards, and fitness-style dashboards look more polished and dimensional. Its typical 450 cd/m² brightness supports comfortable readability in everyday lighting, while AMOLED’s inherent high contrast helps dark backgrounds look deep and clean—ideal for “always-on” style themes and UI designs that rely on black-level performance.

For system tuning and demo presentation, the stable 45 Hz operation (43–47 Hz) provides consistent motion for common wearable animations such as scrolling lists, rotating dials, and progress arcs, giving your prototype a smoother, more “finished product” impression during evaluation.

1.39-inch circular AMOLED display front live demo
Specifications
Size

1.39 inch
Pixels

454RGB × 454
Interface

,

Brightness

450 cd/m² (typ)
Manufacturer

Gesight
Display Type

AMOLED
Display Mode

AMOLED
Color Depth

Refresh Rate

45 Hz (typ), 43–47 Hz
Viewing Angle Range

80°/80°/80°/80° (L/R/U/D, CR≥10)
Outline L*W*H

≤ 42.0 × ≤ 42.0 × 0.733 mm (module outline ≤ φ42; max thickness 0.733 mm MDL)
Active Area L*W

35.412 × 35.412 mm (AA = φ35.412 mm)
Orientation

Supply Voltage

VDDIO: 1.8 V (typ) [1.65–1.95 V]; Vbat: 3.7 V (typ) [2.9–4.8 V]
Consumption

260 mW (typ) @ 100% on, 450 nits, 45 Hz; 38 mW (typ) all pixel off; 1.2 mW (typ) standby (Vci on/Vddio on); < 50 μW standby (Vci off/Vddio on)
Operating Temperarure

−30 to +70 °C
Storage Temperature

−30 to +80 °C
Bezel Area (mm)

2.275 mm
Aspect Ratio

1:1
Connection Type

Board to Board Connection
IC package

COF
Touch Panel

Pixel Pitch

78 µm
Sunlight Readable

–
Model

BO139A454SPI
PPI ( pixels per inch )

326 PPI
Application

Display terminals for Round Watch
Pins Description
Pin No. Symbol (Pin Name) I/O Function
1 XRES I Device reset signal (0: enable; 1: disable)
2 VCI_EN I VCI enable signal
3 NC (MTP) - Floating
4 GND Power Ground
5 TE O Synchronous signal output from panel to avoid tearing effect
6 DSI_D0N I/O MIPI data negative signal
7 AM_SPI_CSX I SPI interface
8 DSI_D0P I/O MIPI data positive signal
9 AM_SPI_SCL I SPI interface
10 GND Power Ground
11 AM_SPI_DCX I SPI interface
12 DSI_CLKN I MIPI strobe negative signal
13 AM_SPI_SDI I/O SPI interface
14 DSI_CLKP I MIPI strobe positive signal
15 AM_SPI_SDO I/O SPI interface
16 GND Power Ground
17 NC - Floating
18 VDDIO Power Power supply for interface system except MIPI interface
19 VBAT Power AMOLED power
20 VDDIO Power Power supply for interface system except MIPI interface
21 VBAT Power AMOLED power
22 VBAT Power AMOLED power
23 VBAT Power AMOLED power
24 VBAT Power AMOLED power

 

Electrical Characteristics

Electrical Characteristics (BO139A454SPI)

DC Characteristics Requirements (Table 3)

Item Symbol Min Typ Max Unit Remark
I/O Supply Voltage VDDIO 1.65 1.8 1.95 V
Battery Power Voltage Vbat 2.9 3.7 4.8 V
Input High Voltage VIH 0.8*VDDIO -- VDDIO V
Input Low Voltage VIL 0 -- 0.2*VDDIO V
Output High Voltage VOH 0.8*VDDIO -- VDDIO V
Output Low Voltage VOL 0 -- 0.2*VDDIO V
Frame Frequency FFRAME 43 45 47 Hz Note 1

Power Consumption of Panel (Table 4) (Power Supply: VDDIO=1.8V, Vbat=3.7V)

Display Mode Item Power Typ Power Max Unit Remark
100% Pixel On, 450 nits, 45 Hz Normal mode -- 260 mW
All Pixel Off, 0 nits, 45 Hz Normal mode -- 38 mW
All Pixel Off, 0 nits / Vci on / Vddio on Standby mode -- 1.2 mW
All Pixel Off, 0 nits / Vci off / Vddio on Standby mode -- <50 uW
10% Pixel On, 50 nits, 15 Hz Idle mode -- TBD --
100% Pixel On, 800 nits, 45 Hz Boost mode -- TBD --

Back-light Specification Form (BO139A454SPI)

Back-light Parameter Value
Backlight Type N/A (AMOLED, self-emissive)
LED Color N/A
Forward Voltage (VF) N/A
Forward Current (IF) N/A
Backlight Power N/A
Backlight Lifetime N/A
Backlight Connector N/A

 

FAQ

Where can I buy this display？

If you just need a few samples, it`s better to directly on our Aliexpress store, we are 5 stars feedback supplier with 100% Honesty. (The buy link is on the right of the product image)
For bulk orders, it`s better to contact us and get a better price. 

Different displays have different characteristics, just tell Gesight Display your application, and operating environment, Gesight Display will suggest a suitable display for you.

Gesight Display provide HDMI/Type-C controller board or individual demo kit to test.
The pictures of demo kit can be changed by yourself. 

Gesight Display will provide necessary specifications for most LCD/OLED on sale, including,
Display Datasheet
Display Drawing
IC Datasheet
Circuit schematic
For most electronics engineers, our specifications are enough to run the display, and we will provide some assistance.
But Gesight Display is not a school, if customers don`t know the basic knowledge to design circuit boards, we suggest using our controller board to drive the display.

First, you need to check whether this display has On-cell or In-cell touch panel, if has, it only needs to add a cover glass on it. If not, it needs an external touch panel.
(On-cell and In-cell are integrated PCAP touch panels on the display screen)
Because the shape of the cover glass depends on the design of the clients, to avoid infringement of appearance,  most of the developers need different customized touch panels.
Gesight Display can provide a customized touch screen with a low cost of tooling charge.

1. UPS/Fedex/DHL/TNT, the best choice for most clients, 3~7 days to arrive.
2. Aliexpress standard ship, this way is cheap and slow, usually take more than 10 days. Only for samples.
3. For Russian clients, EMS or Aliexpress shipment is better.
4. Any designated logistics are acceptable
 

Most display panels are from giant manufacturers such as BOE, Sharp, LG, EDO, AUO, etc. They have already tested with strict standards.
For OEM products from Panox Display factory, please check the quality test standards.   

The lifetime is different on different images, check the lifetime on datasheet to study it. 

If your Raspberry Pi can support the interface of the display panel, and you know how to program on Raspberry Pi, you can connect to our display.
If you don`t know or don`t want to write a display program on Raspberry Pi, it`s better to get an HDMI controller board from us, and Panox Display will send a config.txt file for reference.
 

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Free convertor board and Connectors

Fast Shipping

Most of our clients are manufacturers purchasing our displays for their applications, who are willing to get samples as soon as possible.

Different products collocations have different package, please confirm the shipping cost with us when place an order.

(4~6 days for most countries and area)

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Specification

Panox Display offers the following specifications for most LCD/OLED products:

  • Display datasheet

  • Mechanical drawing

  • IC datasheet

  • Circuit schematic

Readable Under Sun

Compare to LCD, OLED has many advantages as follows:

Thin Like Paper:More than 50% thinner and lighter than LCD, creating an edgy form factor in style.

Green Power:Clock-mode standby can be up to 60 hours, much lower consumption compare to LCD displays.

"Wow" Effect:High contrast ratio and wide color gamut offer sharp and vivid image, and consistent display from any angle.

OLED Type Structures

        OLED driver as well as two divided into passive (PMOLED) active (AMOLED), which PMOLED simple structure, each pixel is represented by a separate cathode and anode control, no additional driver circuit, but too much control lines restrict its application of high-resolution large screen; AMOLED entire cathode surface electrode via a drive circuit driving the light emitting anode, significantly reducing the number of control lines, it has a low-power, high-resolution, fast response and other characteristics, AMOLED therefore gradually become the mainstream OLED display.

About Us

Gesight is a high-tech company specializing in OLED, LCD displays. Integrated with display marketing and sales, customized LCD OEM manufacturing, driver board development, customized TP, etc.

After six years of effort and development, we have grown up to a certain size, now we have a service team with excellent service quality, professional technical service.

After several years of steady development, Gesight has served hundreds of customers from different places all over the world. Including big companies such as Bosch, Nokia, Garmin, Circuits, and countless small and medium-size companies or electronics DIYers.

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Say No to any bright/dart dots on screen !!
Strict Quality Control


We implement strict quality control through every stage of production and inspection. Each display undergoes rigorous testing to eliminate any pixel defects, including bright, dark, or stuck dots. Our professional QC team uses advanced optical equipment to ensure flawless screen performance, delivering only high-reliability LCD and OLED panels to our customers.

strict quality control

rigorous testing

flawless screen performance

high-reliability

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