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DLP4620S-Q1: DLP230 White calibration

Bright Kim
Prodigy 45 points
Part Number: DLP4620S-Q1

Tool/software:

We are trying to perform a DLP4620 DMD White point calibration using the DLP230 program.

I would like to use the CL200A in the DLP230 program instead of the CA-210 as the light meter.

I am wondering that if there is any F/W support for this.

  • 0
    TI__Expert 3525 points

    Hi Bright,

    Sorry, but the CL200A is not the correct type of instrument for this calibration method.  It is not possible to use it.  The CA-210, CA-310, CA-410 are the only compatible options.

    Jason

  • 0 in reply to Jason Thompson
    Prodigy 45 points

    Thank you for reply, We will try to purchase CA-210, CA-310, CA-410 from South korea Aagency.

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Kim,

    Adding to the list that Jason provided. CA-510 series is also compatible. This is the latest model from Konica Minolta.

    Thank you,

    Regards,
    Aishwarya

  • 0 in reply to Aishwarya K Aithal
    Prodigy 45 points

    The CA410 Series has several different probes.
    I would like to purchase the CA-P410 (φ10mm). Please confirm.

    1. High Sensitivity Probe
    CA-VP410 (Measuring diameter: φ10mm)
    CA-VP427 (Measuring diameter: φ27mm)
    2. General Probe
    CA-P410 (Measuring diameter：φ10mm)
    CA-P427 (Measuring diameter：φ27mm)
    3. Mini Probe
    CA-MP410 (Measuring diameter：φ10mm）
    4. Long Range Probe
    CA-VP410T (Measuring diameter: φ10mm)
    5. Guaranteed precision from low to high luminance
    6. Improved chromaticity measurement accuracy
    7. Data Processor CA-DP40 pursuing 'simple operation'
    8. PC software CA-S40 (Basic accessory)

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Kim,

    Yes. CA-P410 would be okay.

    Thank you,

    Regards,
    Aishwarya

  • 0 in reply to Aishwarya K Aithal
    Prodigy 45 points

    Is it possible to share the Model informations for the Diffuser sheet and ND Filter motor setup as well?

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Kim,

    You can find information on how to select the right diffuser here. Since both the diffuser and ND filter wheel are third party products, please contact respective manufacturers for more details.

    Regards,
    Aishwarya

  • +1 in reply to Aishwarya K Aithal
    Prodigy 45 points

    According to the company, the CA-VP410 probe can be purchased immediately because the delivery time is short.

    I would like to know if it is possible to purchase it as a CA-VP410 probe, and if it is possible to use only the probe without CA-DP by connecting it to a PC.

    Additionally, can we proceed with a setup that measures image brightness through the glass side of the temperature chamber?

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Hello Kim,

    CA-VP410 should be alright. You do not need a data processor. You can directly connect the probe to the PC and interface with DLPC230 Control program.

    You can measure brightness through the glass of the temperature chamber. Although, I would suggest that you check for any possible shifts in color due to the glass.

    Thank you,

    Regards,
    Aishwarya

  • 0 in reply to Aishwarya K Aithal
    Prodigy 45 points

    I checked the CA-P410 and it's a contact luminance meter. According to the guide from TI, I need to measure the diffuser screen, but there is an ND Filter in front of it, so it is difficult to contact. I know CA-PU12 is also contact type, so I would like to know how to measure it.

    Also, the reason to use ND Filter is that CA-P410 5000nits is the maximum measuring range, so is it considering the case of exceeding the Max Luminance? 

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Kim,

    "Also, the reason to use ND Filter is that CA-P410 5000nits is the maximum measuring range, so is it considering the case of exceeding the Max Luminance?"

    This is correct. The PGU (projector + diffuser) can exceed this limit by at least 30x. The CA probe is in contact (or very close) to the ND filter, as shown in the diagram. You are measuring the brightness at the ND filter. 

    "According to the guide from TI, I need to measure the diffuser screen"
    May I ask which guide you are referring to?

    Thank you,

    Regards,
    Aishwarya

  • 0 in reply to Aishwarya K Aithal
    Prodigy 45 points

    According to the RGB_LED_Cablibraiton_for_AR-HUD-v1.0 document, it looks like it is measuring the diffuser sheet. However, I am concerned that the CA-VP410 Probe does not directly contact the diffuser the way it contacts the ND Filter, so it will not be an accurate measurement. I checked with the manufacturer and they said that a defocus of +-5mm does not change the measurement much, so I think I should configure the ND Filter as thin as possible.

    I have a few more questions.

    1. the probe I end up purchasing is the CA-VP410 (discontinued) model. Is there any problem with TI S/W integration?
    2. I plan to purchase a diffuser sheet and stick it to the chamber glass. Can you provide me with the specifications of the diffuser sheet (transmittance, haze factor, etc.)?

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Kim,

    The CA measures at the ND filter. As shown in the picture you have attached. The diffuser will be a part of projector.
    There is no issue with interfacing CA-VP410 with DLPC230 Control Program. 

    You can check out the technical document: HUD Optics Primer (Slide 13 to 27) for guidelines on choosing a diffuser screen. Let me check if we can share the spec of the diffuser screen we have evaluated.

    Thank you,

    Regards,
    Aishwarya

  • +1 in reply to Aishwarya K Aithal
    Prodigy 45 points

    I understood that in a HUD you put a diffuser screen in front of the DLP projection to prevent sunlight, but the application we are configuring is not a HUD but a Holographic display. So that is the configuration that the projector is irradiating on the HOE diffuser sheet. In that case, should the diffuser screen be configured with the HOE diffuser sheet? The image below is a schematic of an example holographic display. 

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Kim,

    Thank you for that context. I understand that it might be challenging to incorporate the HOE during calibration. You could try to correlate the color temperature of the HOE with the diffuser screen. This way you could use the diffuser screen directly in your calibration setup.

    Please allow me time to discuss this further with my team. Meanwhile, attached the spec of the diffuser screen we have evaluated - /cfs-file/__key/communityserver-discussions-components-files/94/H406RW_2D00_5_5F00_Kuraray_5F00_Diffuser_5F00_Datasheet_5F00_rev4.pdf

    Thank you,

    Regards,
    Aishwarya

  • 0 in reply to Aishwarya K Aithal
    TI__Expert 3665 points

    Hello again Kim,

    I would propose taking this conversation offline because this will need in-depth discussion. Let's continue our conversation via email. I believe I already have your contact.

    Thank you,

    Regards,
    Aishwarya

  • +1 in reply to Aishwarya K Aithal
    Prodigy 45 points

    Thank you for joining us for today's meeting.
    The film we are developing is a reflective HOE film (focused lens), so we are going to proceed with the configuration below.

    We will only adjust the projector by temperature and ignore the temperature change of the HOE film.

    Let's test the effect of the glass in the chamber on the color change with a colorimeter.

  • +1 in reply to Bright Kim
    Prodigy 45 points

    My company has a CA-2000 luminance and chromaticity meter.

    I would like to measure with the CA-2000 instrument instead of the CA-VP410T, but I want to make sure that it can be connected to TI S/W.

  • 0 in reply to Bright Kim
    TI__Expert 3665 points

    Hello Bright,

    No. The white point calibration algorithm needs a color meter. The TI SW only supports the CA 210, CA 310, CA 410 and CA 510 series.

    Thank you,

    Regards,
    Aishwarya