Patent ID: 11879774
Assignee: SIGNIFY HOLDING B.V.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. The method according to claim 13, wherein the optical sensor is an image capturing device and the method further comprising:
taking an image of the light indicator when being illuminated by the light source,
calculating the value of the melanopic DER from the intensities of light emanating from the first light indicator element (110) and the second light indicator element using the formula:, melanopic
      ⁢
         
      DER
     
     =
     
      
       k
       ⁡
       (
       
        
         
          
           m
           1
          
          ⁢
          
           R
           m
          
         
         +
         
          
           m
           2
          
          ⁢
          
           G
           m
          
         
         +
         
          
           m
           3
          
          ⁢
          
           B
           m
          
         
        
        
         
          
           p
           1
          
          ⁢
          
           R
           p
          
         
         +
         
          
           p
           2
          
          ⁢
          
           G
           p
          
         
         +
         
          
           p
           3
          
          ⁢
          
           B
           p
          
         
        
       
       )
      
      n
     
    
   
   
    
     (
     
      Eq
      .
         
      9
     
     ), wherein:, Rm, Gm, Bm: mean R, G, B values for the first light reflective element,, Rp, Gp, Bp: mean R, G, B values for the second light reflective element,, k, m1, m2, m3, p1, p2, p3, n: regression parameters.