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CCS/DLPC3433: When the temperature is higher than 60’C, the noisy screen happens.

Part Number: DLPC3433
Other Parts Discussed in Thread: DLP3010, DLPA2000,

Tool/software: Code Composer Studio

My device includes DLPC3433, DLPA2000 and DLP3010.

When the temperature is higher than 60’C, the noisy screen happens. You can see the below pictures.

 

I try to figure out if it’s from MIPI or sub-LVDS.

So, I use DLPC3433 to generate test patterns. The result is good. And then, I change back to the external mode. The noisy screen happens. So, I think that the issue is from MIPI timing. Have you ever seen this issue in other companies?

I check MIPI from my MIPI host IC. Only 1 item can’t meet and it’s not meet LP not between pixel lines. Others should be good. In my case, time for HSYNC and HBP enters Low power. I check this with my vendor. He said that it forces to enter Low Power mode if the blanking is long enough. Can DLPC3433 accept it?

Could you also help to check below MIPI waveform and decode result?

1.      THS-prepare + THS-zero (Ch1: MIPI_Data_N)


2.      Time for VFP (5), VSYNC (5) and VBP(20)


3.      Time for HFP


4.      Time for HSYNC and HBP


  • Hi Chia Wei Yu, 

    I noticed this is a duplicate question. To keep everything organized, let's use the original post to resolve your issue (I've already posted a response and some follow up questions on that one). Can you please make this post as "resolved" to close it out? 

    Thanks!

    Brandon