DIY mini 720P projector

 Introduction to the project

A small projector light machine driver board project. There are two boards inside.

One is a four-layer board, OVP2200 screen driver board, and the driver IC used is OVP0921, which supports RGB input and MIPI-CSI input, but the relevant parameters and initialization code must be configured through I2C in advance.

The other is a double-layer board, RTD2662 HDMI input to RGB888 driver board, supports 5-24V DC input, built-in I2S DAC, and then adds a power amplifier to directly support sound output.

Detailed

The physical assembly is the optical machine found on Xianyu, with a resolution of 1280x720. The resolution is high, but the drive is complex, so a dedicated driver IC is required. LCOS chips are OVP2200. The driver IC uses OVP0921.This chip is a bit expensive, and JLC currently has it in stock.
The backhand made a driver board and lit up the screen. The driver board inputs are a standard 40-pin RGB888 interface and a Raspberry Pi MIPI-CSI interface.
OVP0921 built-in microcontroller, the code of the microcontroller can be started and run in two ways. One is to start through an external spi-flash, and the other is to upload the firmware sequence through the I2C interface to start running. At the moment, it seems that there must be a firmware code. Configure other registers to take effect. Therefore, the landlord puts a PY32F002A on the driver board board to dynamically initialize the OVP0921 according to the user's choice.

For more information, please see https://whycan.com/t_10203.html sharing.

Next is the actual picture taken.

Video:  https://www.bilibili.com/video/BV1Lr42187pE/?spm_id_from=333.999.0.0