A vehicle light controller that facilitates recognition of a vehicle. Accordingly, dust on the air filter is scraped by the bristle portion. A sum of horizontal component directions of a pretilt direction of the plurality of pretilt directions is substantially equivalent to a sum of horizontal component directions of a fringe field at a peripheral boundary of the pixel electrode in the domain. The executing subsystem, upon receiving a transaction command from the issuing subsystem, references the second set of authorization data, judges whether or not the command is to be authorized for execution in response to the request from the group whose command is augmented with identifying information and, if it is judged that it is to be authorized, executes the command.