Patent ID: 11886647
Assignee: SHANGHAI JIAO TONG UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The in-air gesture control method based on visible light signals according to claim 1, wherein the emitted light signals are generated by the display device switching two adjacent complementary frames, and the line-by-line refresh scheme generates spatial resolution information out of the perception range of the human eye; when two complementary frames of n lines are switched continuously, the display device generates a high-frequency light signal of, n
    *
    
     f
     s
    
   
   2
  
  ,, where: fs represents the refresh rate of the display device, then the light signal emitted by the display device has two frequency components:, n
     *
     
      f
      s
     
    
    2
   
   ⁢
     
   Hz
   ⁢
      
   and
   ⁢
      
   
    
     f
     s
    
    2
   
   ⁢
     
   Hz
  
  ,, and the complementary block is on one side of the light sensor; in order to hide a complementary frame into the content of the display device, it is necessary to convert the pixels that need to be modified, that is, the complementary block parts, from RGB color space to CIE 1931 one by one to XYZ color space, and then the original pixel is convert into two complementary pixels to form two complementary frames.