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  • TI Thinks Resolved

DLP3010: DLP3010: Questions about 120Hz 3D input source (Continued)

Intellectual 360 points

Replies: 1

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Part Number: DLP3010

Hi 

No one answered my questions in my last E2E question, so I'm creating my question list here.

I'm using our own board with DLPC3433 and DLPA2000 to bring up DLP3010 at DSI 1280x720 @120Hz.  

1. There is known defect in firmware, it does not work at 120 Hz frame over DSI for this format. We plan to fix this bug in the next firmware release. This limitation is documented in "DLPC3433 and DLPC3438 firmware v 7.4.2 release notes".

-> Could you provide the link of "DLPC3433 and DLPC3438 firmware v 7.4.2 release notes"? I didn't find it out on TI's website.

     And, may I know the schedule of the plan? 

2. I assume "black insertion" , you mean no display or dark screen for a specific time within  a frame and it is repeated ( same dark time and same place) for every frame.

DLP technology supported this feature through DMD sequence. The DMD sequence defines the PWM used to create an image by  series of DMD mirror switching on along with LED. As a part of this sequence , we  can insert dark in the sequence on a specific location.   It is not tied to any color cycle , in fact it time taken from the over all frame time. The RGB color cycle are display in the remaining frame time. We are able to do this due fast switching time of DMD.

This will require a custom firmware with dark time sequence from TI. I will request my local colleagues to reach out to you and address this need.

the LED is switched during dark time.

-> I check with Tony Lee, my TI FAE in Taiwan. The dark time only works between the left eye and the right eye at 120Hz 3D mode. The maximum dark time is 2000us. Is it correct? 

Actually, I'd like to use the black insertion to solve color breakup (or motion blur) Does DLP support this feature?

3. For 120Hz 3D mode over DSI interface, it should be 16-bit YCrCb 4:2:2 (standard sampling assumed to be Y0Cb0, Y1Cr0, Y2Cb2, Y3Cr2, Y4Cb4, Y5Cr4, …

I checked EDID setting and didn't find out setting for 16-bit & YCrCb 4:2:2.

Do you know how to set  the EDID for 16-bit & YCrCb 4:2:2?

BR,

Wilbur. 

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