DLP3010EVM-LC: 1bit Splash Pattern Artifact Issue

user6427956

Part Number: DLP3010EVM-LC

Hello,

I'm trying to display multiple 1 bit splash patterns using DLP3010EVM-LC, and find that if I put more than 3 different patterns into the splash image, the pattern being projected may contain serious artifacts.

Now I have 5 patterns, If I put pattern1, pattern2, and pattern3 into the blue channel of the splash image, all of the three patterns being projected look good.

Here is the projected patten1 being captured by a gray scale camera. (The projector is intentionally defocused so that the projected binary pattern looks like a sine pattern)

And If I put all of the 5 patterns into the blue channel of the splash image, the projected patterns become strange. Following is the projected pattern1 with artifacts.

I found this problem similar to what is described in this thread:

https://e2e.ti.com/support/dlp-products-group/dlp/f/dlp-products-forum/776838/dlp2010evm-lc-dlpc347x-splash-pattern-issue-and-questions/2895426?tisearch=e2e-sitesearch&keymatch=splash%25252525252525252520pattern#2895426

Can this be solved? or is it the limitation of the hardware?

Thanks.

over 2 years ago

0 Cody Smith over 2 years ago

TI__Expert 3360 points

Hi User,

Welcome to the TI E2E forums and thank you for your interest in DLP technology.

We will look into this and get back to you by the end of next week.

Thank you,

Chris

0 user6427956 over 2 years ago in reply to Cody Smith

Prodigy 80 points

Hi Chris,

thanks for your reply. I have an update on this issue. I just tried to use the external pattern mode, and the same thing happens as the splash pattern mode. (<=3 patterns per frame, good; > 3 patterns per frame, artifacts appear).

Best regards.

Runze Liu

0 Philippe Dollo over 2 years ago in reply to user6427956

TI__Mastermind 28005 points

Runze,

Can you please elaborate on your pattern streaming setup? Can you share your GUI configuration page?

Regards,

Philippe

0 user6427956 over 2 years ago in reply to Philippe Dollo

Prodigy 80 points

Hi Philippe,

Here's my splash pattern configuration.

And following is my external pattern configuration. I'm using my computer's HDMI port as the source of the pattern, the refresh rate is 50Hz.

I have some new information on this issue. I tried another set of patterns in which the patterns contains less high frequency content and are more similar between each other. This time the EVM can project 8 patterns without artifacts. It seems that the more complicated the patterns are, the fewer patterns the EVM can project correctly.

Best regards,

Runze Liu.

0 Arthur Brown over 2 years ago in reply to user6427956

TI__Genius 16840 points

Runze,

I apologize for the delay someone will look at this and post back.

Regards,

Arthur

0 user6427956 over 2 years ago in reply to Arthur Brown

Prodigy 80 points

Hi Arthur,

Are there any updates on this issue?

Thanks,

Runze

0 Arthur Brown over 2 years ago in reply to user6427956

TI__Genius 16840 points

Hello Runze,

No update yet, please allow us until next week to respond.

Regards,

Arthur

0 user6427956 over 2 years ago in reply to Arthur Brown

Prodigy 80 points

Hi Arthur,

Any updates?

Thanks,

Runze

0 Arthur Brown over 2 years ago in reply to user6427956

TI__Genius 16840 points

Hi Runze.

Can you share with us the pattern files that you are using and we can reproduce the issue on our hardware. this will help us debug this hands on

Regards,

Arthur

DLP®︎ products

DLP products forum

DLP3010EVM-LC: 1bit Splash Pattern Artifact Issue