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Near Eye Display with DLP 2010 EVM?

sa bu
Prodigy 20 points
Other Parts Discussed in Thread: DLPC3430, DLPA2000, DLPA2005

Is the Optical Engine included with the DLP 2010 EVM suitable for a near eye display? If so, can you provide some guidelines on size, appropriate distance from eye and safety considerations?

Thanks,

Sanjay

  • 0
    TI__Intellectual 2200 points

    Hi Sanjay,

    The OE that comes with DLP 2010 EVM is not suitable for near eye display.

    Size of the optical engine used in the DLP® LightCrafter Display are as below:

     Length   31     mm

    Width    32     mm
    Height   12.5  mm

     Total volume of the optical engine is: 4-6 cc

     Weight of the optical engine: 15 gram.

    Frank Xi

  • 0 in reply to Frank Xu
    Prodigy 20 points

    Thanks Frank.

    I notice that the DLP® 0.2 WVGA DMD is positioned on your web site as being suitable for near eye displays. Do you have a suitable optical engine recommendation?

    Sanjay

  • 0 in reply to sa bu
    TI__Intellectual 2200 points

    Hi Sanjay,

    The TI DLP Pico chip set is capable of doing NED, but this particular 2010EVM with .2 wVGA optics is not designed for NED.

    TI DLP doesn't design OE, but we supply IC for different applications, including NED.

    Customers can use .2 wVGA DMD or .3 720p DMD + DLPC3430 + DLPA2000 to make a NED.

    A company called "Avegant" http://avegant.com/ used the DLP Pico chip I mentioned above to make a pretty good NED. You can now pre-order the NED.

    Frank

  • 0 in reply to Frank Xu
    TI__Prodigy 80 points

    Hi Sanjay,

    I recommend browsing the DLP Design Network: http://www.ti.com/lsds/ti/analog/dlp/solutions-services.page

    You can find a 3rd party that can help with optical design. As of today, DLP near eye display customers are developing their own custom optics, so unfortunately there aren't any "off the shelf" modules similar to traditional projection modules.

    Jesse

  • 0 in reply to Frank Xu
    Prodigy 30 points

    I know this post is about a year old, but I have a relevant question.

    I purchased the lightcrafter 2010EVM with the intent of using it to design a prototype near eye display. The module arrived today and I didn't see this post before.

    Why is the 2010EVM not suitable for a NED? 

    Thanks,

    Hannah

  • 0 in reply to Hannah Heyob
    TI__Intellectual 2200 points

    Hi Hannah,

    Please let me make it a little clear. The 2010 chipset (DMD, 2010 Controller, DLPA2000) is suitable for NED, but the design of this EVM is not intended for NED.

    First, the optical engine is not intended for NED, it's designed for project on the wall instead of in your eye. The PCB itself is way too big and LED current is too big for NED.

    Again, 2010EVM is not suitable for NED, but chipset does. You have to make NED display PCB small with low current and NED display optical engine.

    Regards,

    Frank Xu

  • 0 in reply to Frank Xu
    Prodigy 30 points
    Thank you for the clarification! So is it possible to simply swap out the optical engine or is this module completely useless (for my needs) and this path a dead end?

    If so, should I try to exchange my module for one better suited to this project, is there one?

    I got this module specifically and solely for my senior project (NED) so any advice you have would be recommended. Thanks!
  • 0 in reply to Hannah Heyob
    TI__Intellectual 2200 points
    Hannah,

    The 2010EVM is not designed for NED, keeping on pursuing this path will take you nowhere. I know a company "Avegant" who used TI Pico DLP chipsets to make excellent NED product called "Glyph". It's for sale right now. You can visit https://avegant.com/
    This will fit what you are looking for.

    Regards,

    Frank Xu
  • 0
    Prodigy 30 points

    I cannot find schematics and PCB data related to LightCrafter Display 2010 EVM.

    Please provide the address of the Web site.

  • 0 in reply to stone Jeong
    TI__Genius 10495 points

    Hello User,

    Thank you for your interest in our DLP Technology.

    The schematic can be found in the DLPDLCR2010EVM Tool folder under Reference Designs.

    Please see following link.

    Best regards,

    Nadine

  • 0 in reply to Frank Xu
    Prodigy 10 points
    Hi Frank,

    Is there any way I can reduce the LED currents to below 40 mA? In the advanced GUI settings, whenever I write the current as any number less than 40 and read, it switches back to 41. I am trying to set it to 5 mA.

    Thanks,
    Suchit
  • 0 in reply to Suchit Madan
    TI__Genius 10495 points
    Hello Suchit,

    The reading you are getting the DLP LightCrafter Advanced Mode is not the actual current value it is the IDAC value for the DLPA2005.

    The IDAC value of 41 correlates to a current of 100mA with a resistor of 39mOhm.

    The current accuracy is 100mA with a resistor of 39mOhm.

    With the current configuration on the DLP LightCrafter 2010 EVM a current of 5mA is not achievable.

    Best regards,
    Nadine