Abstract: A light source driving device includes: a light emission control unit configured to control light emission of a light source in response to an instruction signal; a communication circuit which receives a first instruction signal instructing first light emission control for visible light communication; and a timer which starts to measure waiting time for executing the first light emission control, triggered by the reception of the first instruction signal. The light control unit starts the first light emission control of the light source in response to an instruction signal at the end timing of the waiting time.

Abstract: A group setting method for an illumination fixture is a method of setting each of a plurality of illumination fixtures as a group, the plurality of illumination fixtures each having a light output pattern including its own unique identification information. The method includes photographing a first illumination fixture of the plurality of illumination fixtures with a terminal device having an imaging part to identify identification information of the first illumination fixture based on a light output pattern of the first illumination fixture, subsequently photographing a second illumination fixture of the plurality of illumination fixtures with the terminal device to identify identification information of the second illumination fixture based on a light output pattern of the second illumination fixture and identifying first group information of the second illumination fixture, and next setting the first group information identified for the second illumination fixture to the first illumination fixture.

Abstract: A light source driving device includes: a light emission control unit configured to control light emission of a light source in response to an instruction signal; a communication circuit which receives a first instruction signal instructing first light emission control for visible light communication; and a timer which starts to measure waiting time for executing the first light emission control, triggered by the reception of the first instruction signal. The light control unit starts the first light emission control of the light source in response to an instruction signal at the end timing of the waiting time.

Abstract: A wiper blade is provided with an improved lever to yoke connection. The lever has a yoke-fitting part at each end defining a hooking hole with an opening which opens towards the opposite hooking hole. The yoke-fitting part includes an engaging part and a projection which defines the opening. The yoke has a lever-fitting part including a lever-setting shaft for engagement with the hooking hole. To prevent the yoke from dropping off the lever, a protrusion is provided on the lever. The particular wiper blade allows easy assembly and improved strength of the yoke.