Patent ID: 11898075
Assignee: BASF SE
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 4:
5. The device of claim 1, suitable to emit a light spectrum having chromaticity coordinates x,y according to the 1931 CIE standard colorimetric system with an ellipse of an equation and parameters:, (
            
              
                
                  (
                  
                    x
                    -
                    h
                  
                  )
                
                ⁢
                
                  
                
                ⁢
                
                  cos
                  ⁡
                  
                    (
                    A
                    )
                  
                
              
              +
              
                
                  (
                  
                    y
                    -
                    k
                  
                  )
                
                ⁢
                
                  
                
                ⁢
                
                  sin
                  ⁡
                  
                    (
                    A
                    )
                  
                
              
            
            )
          
          2
        
        
          (
          
            a
            2
          
          )
        
      
      +
      
        
          
            (
            
              
                
                  (
                  
                    x
                    -
                    h
                  
                  )
                
                ⁢
                
                  
                
                ⁢
                
                  sin
                  ⁡
                  
                    (
                    A
                    )
                  
                
              
              -
              
                
                  (
                  
                    y
                    -
                    k
                  
                  )
                
                ⁢
                
                  
                
                ⁢
                
                  cos
                  ⁡
                  
                    (
                    A
                    )
                  
                
              
            
            )
          
          2
        
        
          (
          
            b
            2
          
          )
        
      
    
    =
    1
  
  ,

wherein h and k, and a and b are the shifts and semi-axis in x and y directions respectively and A is an angle measured from x axis, wherein h is 0.52, k is 0.46, a is 0.25, b is 0.03, and A is −42.