Patent Number: 6,167,199

Title: Information transmitting apparatus using flash light emission

Abstract: In an information transmitting apparatus capable of transmitting information by using flash light emission of a flash light emission tube, communication data is detected at timing synchronized with a predetermined period and, when the detected communication data indicates a light emission instruction, a predetermined light emission signal is formed and outputted to cause the flash light emission tube to make light emission, wherein a time interval from a point of time at which the light emission instruction has been detected to a point of time at which the light emission signal is outputted is varied according to a time interval from a point of time at which the preceding light emission has been performed to a point of time at which the light emission instruction for the current light emission is detected, so that the intervals of flash light emission are adjusted.

Inventors: Fukui; Hajime (Tokyo, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G03B 17/38 (20060101); G03B 15/05 (20060101); H05B 41/30 (20060101); H05B 41/32 (20060101); G03B 015/05 (); H05B 037/00 (); H04B 010/00 ()

Expiration Date: 12/26/2017