Provided is an organic light-emitting diode including a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer and at least one first material represented by Formula 1 and at least one second material represented by Formula 2. According to one example method, a first order for a first tradeable object and a second order for a second tradeable object are placed based on a spread strategy. When the preset temperatures read at the previous cycle and the current cycle are different from each other, the control preset temperature is regarded as the preset temperature which changes gradually from the previous one to the current one, whereby the temperature of air blown into the passenger compartment gradually changes. For instance, the user interface can include an arrangement of juxtaposed time ranges for each participant, where the time ranges have a staggered appearance so that a local time for each of the time ranges corresponds to the preferred time.