[Radiance-general] glare on monitor screen

[erika yuniarti]

Hi Greg,
   
  thank you for your quick reply and your attached LCD info.
   
  Yes correct, I am thinking of veiling glare on the screen that will reduce visibility. Before I received your email, I tried mirror as LCD material. Surely, there is glare (as shown in file.pic), but when I calculate all glare parameter in radiance (dgi, ugr, cie, and others) the results are 0. May be those parameter cannot be used to calculate veiling glare on monitor screen? (high contrast occur vertically on the screen)
   
  Thank you very much, Greg.
   
  Best regards,
   
  Yuni

"Gregory J. Ward" <gregoryjward at gmail.com> wrote:
  Hi Yuni,

Here is a description for an HP LCD monitor we measured at LBNL for 
the New York Times (work sponsored by NYSERDA). You can substitute 
any 1024x768 screen shot you like for "VDTdisp.pic". Make sure the 
maximum value is <= 1.0.

As for glare analysis, I don't know how you mean to associate 
discomfort glare with a VDT. Perhaps you are thinking of veiling 
glare -- reflections from the screen that reduce visibility?

-Greg



> From: erika yuniarti 
> Date: July 25, 2006 10:17:18 AM PDT
>
> Dear all,
>
> I have some monitor screens facing quite big window. Therefore, 
> there may be glare occured on the monitor screens. I would like to 
> study this through radiance. I wonder how to model the monitor 
> screen in radiance (what material, what reflectance?) and what 
> glare assessment should be used (dgi?ugr?cie?or others?)
>
> Thank you very much. I really appreciate your help.
>
> Best regards,
>
> Yuni
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