Patent ID: 11947154
Assignee: SIGNIFY HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 13:
14. The luminaire as claimed in claim 1, wherein an area in between L1 and L2 of the first major light guide plate surface along the edge wall of the light guide plate, along which the LEDs are arranged, is free from outcoupling elements, wherein L1 and L2 are distances from an entry face of the light guide plate, and wherein:, L
    1
  
  =
  
    
      
        D
        
          
            (
            
              
                n
                2
              
              -
              1
            
            )
          
        
      
      ⁢
      
        L
        2
      
    
    =
    
      
        D
        l
      
      
        
          (
          
            
              n
              2
            
            -
            1
          
          ), with
D=the distance between the first major light guide plate surface and the LEDs in a direction normal to the first major light guide plate surface;
Dl=the thickness of the light guide plate in a direction normal to the first major light guide surface; and
n=the index of refraction of the material of the light guide plate.