DLPC3478: How to turn on two LEDs simultaneously in Internal Pattern mode

YONGJIN LEE

Part Number: DLPC3478
Other Parts Discussed in Thread: DLP3010, , DLPA2005

hello.

I am working on a project using DLPC3478+DLPA2005+DLP3010.
I am using 1bit horizontal patterns for the internal patterns.
When using the GUI, Illumination can only be used in R, G, B or RGB.
Is there a way to turn on two LEDs at the same time?
For example, when I print a pattern, can I print it in cyan color (Blue+Green)?
please answer about my question.

7 months ago

0 Maximus Rusi 7 months ago

TI__Expert 5445 points

Hello Yongjin,

Is the pattern you are trying to use cyan or just white? If The pattern is cyan then using RGB mode will show this.

Best,

Maximus

0 YONGJIN LEE 7 months ago in reply to Maximus Rusi

Prodigy 100 points

hello.
Are you saying that the internal pattern function can also output cyan color if you set the pattern file (.bmp) to cyan color and run it in RGB mode?
I tried it and it prints in white. I need your confirmation.
I share the pattern images and settings I use.

0 Maximus Rusi 7 months ago in reply to YONGJIN LEE

TI__Expert 5445 points

Hello Yongjin,

Please allow me some time to look further into this and double check it.

Thanks,

Maximus

0 Mayank Khandelwal 7 months ago in reply to Maximus Rusi

TI__Genius 9971 points

Hello Yongjin,

DLP347X doesn't support overlap i.e. it is not possible to turn on 2 LEDs simultaneously.

Regards,

Mayank

0 YONGJIN LEE 7 months ago in reply to Mayank Khandelwal

Prodigy 100 points

hello.
Thank you for answer.
So, if, like me, you want to use the internal pattern function and turn on two LEDs at the same time, which chip should you use?

0 Maximus Rusi 7 months ago in reply to YONGJIN LEE

TI__Expert 5445 points

Hello Yongjin,

After looking further into it, having only two LEDs on for pattern control is not something we currently support. Depending on your application, you could create identical pattern sets one of green and one of blue monochrome projection.

Best,

Maximus

0 Maximus Rusi 7 months ago in reply to Maximus Rusi

TI__Expert 5445 points

Hello Yongjin,

I also wanted to let you know, if your use case allows for it you can also use external pattern streaming mode. This mode set to RGB will show cyan if a cyan pattern is displayed.

Best,

Maximus

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DLPC3478: How to turn on two LEDs simultaneously in Internal Pattern mode