• TI Thinks Resolved

DLP3010EVM-LC: Projection when Exposure Time is extended

Prodigy 140 points

Replies: 4

Views: 66

Part Number: DLP3010EVM-LC

Hi
Mayank,

I still evaluate the DLP3010EVM-LC,
Using Internal Pattern Mode (Trigger In Mode),
The Exposure Time was re-evaluated up to 2 seconds.

As a result of detailed evaluation, when Exposure Time exceeds 800 ms
I ran into a strange problem.

Please see the table below.

When ExposureTime is 800ms or more
There is a difference in the timing of Pre Dark Time and Trigger Out 2
I found out.

As a result, the timing of LED lighting and the output timing of Trigger Out2
It seems that they are out of alignment.
In addition, as the Exposure Time becomes longer, the actual pattern becomes a fixed cycle.
I also confirmed that the display is changing.

I believe you will solve this problem.
First of all, would you like to see something similar happen in your environment?

Thanks and regards,

Tak

  • Hi Tak,

    I will look into the issue and get back to you soon.

    Regards,

    Mayank

  • In reply to Mayank Khandelwal:

    Tak, 

    I appreciate your patience, I am still looking into your query.

    I have a small query - For the first 4 entries that you marked as ok - in an ideal case - the trigger out 2 timings (the time when the signal is asserted) should match with the exposure time. But in these cases, they are not matching. Why have you qualified them as ok?

    Regards,

    Mayank

  • In reply to Mayank Khandelwal:

    Hi
    Mayank,

    Thank you for continuing to investigate my question.

    First of all, about my evaluation result, from the input of "Trigger In"
    Time until "Trigger Out 2" is asserted
    It means that it was not the timing to set "Pre Dark Time".

    As a result, the first 4 points were “OK”.
    However, "??" did not reach the timing when "Pre Dark Time" was set.
    It means that.

    I made some mistakes in the table and fixed it.
    Please see the table below.
    I also added a timing diagram at that time.

    Also, the assertion time of "Trigger Out 2" that you asked
    Regarding "Exposure Time", I have the same idea.

    However, when "Exposure Time" is set to 2 seconds, the assertion time of "Trigger Out 2" is
    It was about 1.8 seconds. I haven't looked into this rating yet.
    Because one of the causes is doubtful about the result I found.

    Therefore, regarding the “Pre Dark Time” that I asked,
    And I would like to ask you to continue investigating the assertion time of "Trigger Out 2" that you asked.

    I believe you can use my question as a hint to solve this problem.

    Thanks and regards,

    Tak

  • In reply to user6036569:

    Tak,

    Thanks for the feedback, I will get back to you soon.

    Regards,

    Mayank