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changing light commander LED intensities


I am curious if it is possible to have the LED intensities change through a pre-programmed sequence of itensities. For example,  so that frame 1 is 100%, frame 2 is 0%, frame 3 is 100%, etc.

I saw in a manual that the LED intensities can be modified in "real-time" but I want a preprogrammed sequence to repeat itself. 



  • Hi Ramin,

    Welcome to DLP&MEMS forum.

    The answer is 'No'. The real-time here meant on the fly when the system is running. You cannot tie the LED intensities changing precisely to the frame-to-frame level.

    Since you have mentioned pre-programmed sequence of intensities for frame you can achieve this in other way by having multiple patterns of the same pattern at gray scale levels stored in the frame buffer and selecting the needed one using ImageOrderLut command.

    Refering back to your example - If you intend to use only 0% and 100% intensity for a frame then you can simply store four patterns. Let us call them as frame1,frame2,frame3 and a black_frame.

    Before you start the display Write Image order LUT as frame1,black_frame,frame3.

    Now, if you want to change the frame1 - 0%, frame2 - 100%, frame3 - 0% then change ImageOrderLUt as black_frame,frame2,black_frame.

    More details on the ImageOrder LUT -

    When you run the patterns you can look for the following batch file command in the log - command format DLP_RegIO_WriteImageOrderLut <bit-depth> image#,image#,image#....

    Example -  $L2.5 DLP_RegIO_WriteImageOrderLut 8, 0, 1, 2, 3, 4, 5, 6, 7

    8 - bit depth

    0 thrugh 7 - are the pattern order as you selected the images in the GUI.

    Now sending this command

    $L2.5 DLP_RegIO_WriteImageOrderLut 8, 0, 2, 3, 4, 5, 6, 7 will not show pattern '1'.

    This command allows you to select a subset of the images and reorder in any order you would like; further there is no restriction on repeating the patterns in the ImageOrderLUT.