DLPDLCR4710EVM-G2: Flash image update not possible

Hello Marco,

Thank you for your interest in DLP Technology.

Do you prefer to just have the LEDs off on startup or do you intend to just unplug them altogether? We should be able to support your request.

Regards,

John

Hello Marco,

In addition to John's question, please try flashing your customized image with the DLP4710-LC (Light Control) GUI available here. Although this GUI is meant for a different system, it is more agnostic to the target flash device and thus may perform the flash without issue.

Regards,

Austin

Hello John,

Thanks for your quick reply.
We would like to unplug all the LEDs. So our aim is to start up and use the EVM with the LEDs being disconnected.

Best regards

Marco

Hello Austin

Thank you for the tip. OK, we will try it with the DLP4710-LC GUI. I will keep you informed.

Best regards

Marco

Hello Marco,

Was there any change with Austin's recommendation?

Regards,

John

Hello John,
With the GUI for the DLP4710EVM-LC I was able flash our image on the EVM. The firware update took about 10 minutes (in contrast to our trial with the other GUI).
When I start up the EVM with the LEDs plugged in, the LEDs flash up for about a second and then they are turned off. The DMD displays the image from the HDMI input as it should.
I unplugged the LEDs to see if the EVM displays anything on the DMD with the LEDs disconnected. Unforunately, the DMD does not react if I start up the EVM with the LEDs unplugged.
We suspect, that our batch-file did not deactivate the LEDs. Or maybe we made another mistake.

I attached our self-made batch-file as a .txt-file. Maybe you can help us find out what we did wrong?

Regards
Marco

##################################### #
SET UP SPLASH SOURCE #
##################################### 
# Write: ImageCrop 
W 36 10 00 00 00 00 00 05 D0 02 
# Write: DisplaySize 
W 36 12 80 07 38 04 
# Write: InputImageSize 
W 36 2E 00 05 D0 02 
# Write: SplashScreenSelect 
W 36 0D 03 
# Write: InputSourceSelect 
W 36 05 00
# 100 ms delay 
W 36 DB 64 00
# Write: ImageOrientation 
W 36 14 00
# WRITE LED CURRENT 
W 36 54 07 01 07 01 07 01
# Write: WRITE LED ENABLE = 7. DISABLE = 0 
W 36 52 00
# Write: SplashScreenExecute
W 36 35

Hello Marco,

Can you describe your need for a DLP system without LED connections? This would seem to defeat the purpose of the unit.

Regards,

Austin

Hello Austin

We would like to use the DLP as a part of an optical measurement system which we are developing. The DMD will be used to let different parts of a light beam pass the optical path of the system during a measurement process. Therefore we use the HDMI connection to display different images / altering patterns on the DMD. So the purpose of our unit will not be to work as a projector anymore and the LEDs can not stay plugged in for our use.

Can you help us updating the firmware to make it possible to start up the unit with the LEDs unplugged? Or could you provide us an image which solves our problem?

We also have some questions about the optical characteristics of the DMD itself (DLP4710). We are facing some challenges due to diffraction effects, caused by the small structures of the DMD. Is it possible to also receive support concerning the optical characteristics and the optics design?

Regards

Marco

Hello Marco,

Unfortunately I cannot supply this firmware as this feature is not supported on display platforms. You may consider exploring the possibility of this application with the DLPC3479 (DLP4710 Light Control) chipset.

Can you speak more on what optical characteristics you are interested in? Basic optical characteristics for the module can be found in Section 4 of the DLPDLCR4710EVM-G2's User Guide. The optical module in the DLPDLCR4710EVM-G2 is developed by Young Optics. Further information about the optical characteristics of the engine will need to be acquired from Young Optics.

Regards,

Austin

Hello Austin

What are the advantages of the DLP4710EVM-LC compared to the DLPDLCR4710EVM-G2 (which we already use)? They both use the same DMD chip (DLP4710) but with a different light control chipset (DLPC3479 / DLPC3439).

We are interested in the optical characteristics of the DLP4710 chip itself, not the projection optics. Is there a specific incident illumination angle which must be met? Or is it possible to vary the angle of incidence to receive a different output angle of the projected light? As mentioned in my last post, we are struggling with diffraction while trying to use the DMD as a variable aperture.

Regards
Marco

Hallo Austin

Thanks for all the information. We will try to move on with our DLPDLCR4710EVM-G2 Module for the moment with the LEDs still connected.

Thank you for the support.

Best regards

Marco