DLPC3479: The dlpc4710lc does not display images correctly

Part Number: DLPC3479
Other Parts Discussed in Thread: DLP4710LC, , DLPA3005

Tool/software:

Hello!

I use a self-made board, the hardware structure is dlp4710lc + dlpc3479 + dlpa3005.
When I used the External Pattern Streaming Mode, the dlpc4710lc only showed half the image.
In this case, the left side is blank and the right side displays the input image.

Please help to analyze the reason, thank you very much!