Interaction between a client and a service in which the service responds to requests from the client. The method determines a destination in the current road segment or in another road segment of a parallel lane of the current road segment, the determining being initiated by the input. The second optical axis of the emission surface offsets from the first optical axis of the LED in a first direction for increasing a light intensity at a side of the first optical axis in the first direction. A combined solder alloy layer composed of a combination of intermetallic compounds, one of tin and the solder alloy making layer, and one of tin and the UBM layer, is formed by heating and melting. A row decoding unit activates the word line according to the row read signal.