2009-088704 is referenced by 53 patents.

PROBLEM TO BE SOLVED: To accurately perform data communication by allowing a reception side to specify the respective positions of light emitting elements.SOLUTION: An optical transmitting device blinks an LED array with blinking patterns consisting of a lighting pattern of whole lighting, a lighting pattern of whole extinction and lighting patterns of two kinds of grid patterns as the header of a transmission packet, and then, blinks the LED array with blinking patterns corresponding to transmission data. An optical receiving device continuously images the LED array of the optical transmitting device with a high-speed camera, detects the position of the LED array, based on the imaged image of the lighting pattern of whole lighting, and calculates one symbol period, based on the imaged image of the lighting pattern of whole lighting and the imaged image of the lighting pattern for whole extinction. Then, the positions of the respective LEDs in the LED array are specified, based on the imaged image of the lighting pattern of the two kinds of grid patterns, and also the maximum luminance value of each LED is acquired.

Title
Optical transmitting device, optical receiving device, and optical communication system
Application Number
2007-252555
Publication Number
2009-088704
Application Date
September 27, 2007
Publication Date
April 23, 2009
Inventor
Tanimoto Masayuki
Marumichi Tomohiro
Fujii Toshiaki
Arai Shintaro
Yamasato Takanari
Nishimura Yoshihiro
Shirodono Kiyosumi
Ninomiya Yoshiki
Kimura Yoshikatsu
Assignee
Tanimoto Masayuki
Marumichi Tomohiro
Fujii Toshiaki
Arai Shintaro
Yamasato Takanari
Toyota Central R&Amp D Labs
IPC
H04B 10/22
H04B 10/105
H04B 10/10