DIY Mini 720P Projector

This project introduces
a small projector optical engine driver board. It includes two boards:
a four-layer board, an OVP2200 screen driver board using the OVP0921 driver IC, supporting RGB and MIPI-CSI input, but requiring prior configuration of relevant parameters and initialization code via I2C;
and a two-layer board, an RTD2662-based HDMI input to RGB888 driver board, supporting 5-24V DC input, a built-in I2S DAC, and an added power amplifier for direct audio output. The physical assembly
details are as follows:
the optical engine, with a resolution of 1280x720, was found on Xianyu (a Chinese online marketplace). It was originally from a projector, likely a cancelled order. While the resolution is high, the driver is complex, requiring a dedicated driver IC. The LCOS chip is OVP2200, and the driver IC is OVP0921. This chip is somewhat expensive, but JLCPCB currently has some in stock. I quickly assembled a driver board and powered up the screen. The driver board inputs are a standard 40-pin RGB888 interface and a Raspberry Pi MIPI-CSI interface. The OVP0921 has a built-in microcontroller, which can be started and run in two ways: one is via an external SPI flash chip, and the other is via an I2C interface after uploading the firmware sequence. Currently, it seems that firmware code is required for other register configurations to take effect. Therefore, the author placed a PY32F002A on the driver board to dynamically initialize the OVP0921 based on user selection.
For detailed driver information, please see the sharing link: https://whycan.com/t_10203.html.
Next are actual photos and
videos: https://www.bilibili.com/video/BV1Lr42187pE/?spm_id_from=333.999.0.0