The present invention relates to a system and method for providing dynamic wizard interfaces to end users. In some implementations, an attack on a computing device can be detected by identifying unusual events, or unusual sequences of events, that occurred on the computing device. A vector modulation section 13 performs vector modulation on the vector signal. An element structure for preventing the deterioration of the organic light emitting element due to stress is used to suppress the deterioration. Advantageously, embodiments of the apparatus and method may be practiced on either a forward trellis or a reverse trellis.