Taishan School Screen Replica

Wu Gong's Screen Documentation
: https://lceda001.feishu.cn/wiki/K51kwVQ9ViBTeDkYmsRc0YOLnle
Project Module Introduction:
The Taishanpai MIPI interface
uses a 31P MIPI pin interface. Since a 0.3mm 31P unidirectional ribbon cable is used, the FPC connector and Taishanpai connector are reversed. The 3.1-inch
screen interface
uses a 24P 0.5mm FPC connector. A 24P connector is used under the flip cover.
Taishanpai Touch:
The Taishanpai touch interface is inconsistent with the 3.1-inch screen touch interface, requiring a new
3.1-inch touch
backlight circuit.
The Taishanpai backlight current is 110mA
, but the 3.1-inch screen's maximum
backlight current is 25mA. Therefore, R2 and R4
cannot be used with the Taishanpai backlight circuit .
An I2C PWM chip, GP7101, is used here. The Taishanpai (a type of LED)

platform lacks a PWM pin for its 3.1-inch expansion board, but its touch interface has an I2C1 connector connected to the 3.1-inch screen. Since I2C can connect to multiple devices, we use a GP7101 I2C-to-PWM converter chip to achieve backlight adjustment. The GP7101 and the touch interface are connected to the I2C1.

The SY7201ABC is used to drive the LEDs.

The SY7201ABC is a high-efficiency LED driver primarily used to control and adjust the brightness of LEDs. It provides a constant current to ensure consistent and stable LED illumination, thus improving LED lifespan and efficiency.

The microphone and speaker
are located on the side and are
connected using pins instead of soldered wiring. The
actual product
can only be shown in pictures for now.
Screen link: https://item.taobao.com/item.htm?id=602291522189