This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • Resolved

DLP2000: Brightness

Prodigy 60 points

Replies: 2

Views: 1050

Part Number: DLP2000

I read in the manual that the typical brightness settings for this pico projector is 20 Lumens, but it can be set to 30.

How can I do this?

Regards 

Jeandre

  • Jeandre,

    In order to change the system brightness, you need to do two things. First, you need to adjust the LED current register settings. These are located at register addresses 0x12, 0x13, and 0x14. You can write to these registers in the same manner as you would for the video source selection register, as referenced in section 2.1 of the DLPDLCR2000EVM User's Guide, located at: www.ti.com/.../dlpu049c.pdf

    When writing to these three registers, you can simply follow the i2cset command format seen in the User's Guide but switch out the "Device Register" and "Data" fields.

    The LED brightness won't immediately change after writing to these registers. You need to send a compound command to the DLPC2607 after completing these changes in order to "propagate" the new settings to the LEDs themselves. The compound command consists of a handshake at address 0x3A followed by an ICP command at 0x38 (normally a data payload is supplied at 0x39 but we are simply sending a command and no data). This process can be a bit confusing so I will show you an example of how to do this for the LEDs below:

    (In your Terminal):
    >debian@beaglebone: ~$ i2cset -y 2 0x1b 0x3A 0x00 0x00 0x00 0x01 i
    >debian@beaglebone: ~$ i2cset -y 2 0x1b 0x38 0x00 0x00 0x00 0xD3 i

    The first line tells the controller to listen for a compound command, and the second tells the system to issue the "LED current set" command. More information on compound commands can be found in the DLPC2607 programmer's guide, which can be located at: www.ti.com/.../dlpu013.pdf

    As a side note, it is advised that you employ additional cooling if you choose to run your system at 30 lumens. The heatsink provided by default has not been rated for the higher temperatures sustained by this operation.

    I hope this helps. Let me know if you have any trouble with your implementation.

    Best Regards,
    Philippe Dollo
  • In reply to Philippe Dollo:

    Thanks for the quick reply! 

    This should do fine, but if the brightness is still to low, can I modify the EVM board with the DLP2010 DMD?

    Regards

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.