A driver device scans and drives light emission elements arranged in a branch connection to a common terminal using scan-circuit and data drive portions and clock driver and waveform shaper circuits. The assist grip includes an outer cylinder member, a first divisional body, a second divisional body, and an elastic reinforcement member. The predetermined light-emitting block is driven based on the compensation dimming level. The accelerator has an issued request number counter for counting the number of requests issued by the CPU and a processed request number counter for counting the number of processed requests. Also, a lens L4, being closest to the magnification side, of the second group G2 is formed of a negative lens, and the fifth group G5 includes a single positive lens.