Patent ID: 11927476
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A device for detecting ambient light, comprising:
a controller; and
a plurality of ambient light sensors each electrically connected to the controller and configured to obtain brightness information of the ambient light and send the brightness information of the ambient light to the controller;
wherein the controller is configured to determine a brightness interval of the ambient light according to the received brightness information of the ambient light, determine a reference sensor basing on a preset correspondences between a plurality of ambient light sensors and different brightness intervals, and output a brightness signal of a current ambient light according to a preset conversion relationship of output signals of the reference sensor to the brightness signal of a current ambient light; and
wherein sizes of photosensitive areas of the ambient light sensors are inversely proportional to values of the corresponding brightness intervals,
in step S3, the preset conversion relationship is defined as:, S
   =
   
    
     
      ∑
      
       i
       =
       1
      
      n
     
     
      (
      
       
        S
        i
       
       ×
       
        k
        i
       
      
      )
     
    
    n
   
  
  ,
 

S is the output brightness signal of the current ambient light, n is a number of the ambient light sensors, ki is a gain coefficient of an i-th ambient light sensor, and Si is an output signal of the i-th ambient light sensor.