waveshare 0.71inch Double Eye Round LCD Display Module 160×160 Resolution 65K Colors IPS Display Supports Controller Boards Like ESP32 / Arduino, Embedded GC9D01 Driver

Overview
Introduction
The 0.71 inch binocular LCD module features two 0.71 inch round IPS screens with 160 x 160 pixels, equipped with a GC9D01 driver chip, and utilizes SPI
interface communication. It is suitable for integration into controllers such as ESP32, Raspberry Pi Pico, Arduino, etc., and can be used in creative applications
like simulated electronic eyes or wearable devices.

Specifications

OPERATING VOLTAGE 3.3V / 5V
COMMUNICATION INTERFACESPI
DISPLAY PANELIPS
DRIVERGC9D01
RESOLUTION160 × 160 pixels
DISPLAY SIZE18 × 18 (mm)
PIXEL PITCH 37.5 × 112.5 (m)
DIMENSIONS 20.00 × 51.00 (mm)

LCD and its Controller
This LCD uses the built-in GC9D01 driver, with a resolution of 160×160. It has an internal GRAM and supports 12/16/18-bit data bus MCU interfaces, i. e.,
RGB444, RGB565, RGB666 three color formats, which are common RGB formats.
For most LCD controllers, the communication interface can be configured, including 8080 parallel, 3-wire SPI, 4-wire SPI, etc. This LCD uses a 4-wire SPI
interface, which saves GPIO pins and increases communication speed.

Some of you might wonder: since the screen is circular, which point is the first pixel? How do we determine the coordinates?
Actually, you can think of it as a square screen with an inscribed circle inside. We only display content within this inscribed circle, and pixels outside the circle
are discarded. Most circular LCDs on the market work this way.

Package Content
0.71 inch DualEye LCD Module x1
SH 1.0 11PIN cable x1
Convex lens (2pcs) x1