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DLPC7540: DLPC7540 Disp external mode brightness issue

Part Number: DLPC7540
Other Parts Discussed in Thread: DLP650TE,

Hi!

I have a DLP7540 and a DLP650TE  with firmware 4.5.0  dlpc7540_p65_udh_lpcw.dlpxproj.

Now I have  a brightness issue, the brightness of the Disp external mode white color is about 30% lower than that of the curtain mode.

The color coordinates of other RGB monochromes are normal. 

   

I would like to know which parameters to modify to increase the brightness of the Disp external mode?

Thanks!

  • Hello Xinmin Wu,

                           Thanks you for posting your question on e2e forum.

                            Have you tried adjusting the brightness parameter from the Image Processing Tab as below.

                             

    Thanks

    Pavan.

  • Hi  Pavan,

          Thank you very much for your reply.

          This parameter is set to 100-255, but the overall whitening of the picture, the brightness of the white field and the color coordinate have not changed.

    Are there other parameters that can be adjusted?

    Thanks 

    Xinmin Wu

  • Hi Xinmin Wu,

               Do you see any change in the brightness when values are set between 0-100?. Did you try adjusting the contrast values & RGB Offsets used..

                You can also try adjusting the System look to 1 to enable the Brilliant Color algorithm

                   

    Thanks

    Pavan.

  • Hi  Pavan,

         Thank you very much for your reply.

        1. I can see the whole picture turn white when adjusting the brightness parameter, but the brightness of the white field and the color coordinate have not changed;

        2. when adjusting the contrast parameter, the brightness of the white field  have change, but the maximum brightness does not change.

        3.I try to adjust the System look to 1 to enable the Brilliant Color algorithm, but have an error, can not to set the value.

  • Hello Xinmin wu,

                      We are able to reproduce this issue at our end. We started looking into this issue and debugging the possible causes.

                      We look forward to get back with answers before end of this week. We appreciate your patience here, Thank You!

    Regards,

    Pavan.M

  • Hello Xinmin wu,

                  We are tracking to support this issue with an FAE. Our local FAE will be following up and provide you with the further updates regarding this issue, will be closing the thread here.

    Thanks,

    Pavan