An integrated information presentation system includes environmental controls that at least enhances the experience of giving a presentation. In the vehicle seat, the seat back body includes a frame having a frame shape and serving as a framework, a front-side cover portion placed so as to cover a front side of an inner space of the frame and supporting a back of a seated occupant, and a back-side cover portion placed so as to cover a rear side of the inner space. An adjustment circuit includes a first delay circuit supplied with the external clock signal, and a detection circuit which detects a skew between timing of a first clock signal output from the first logic circuit and a second clock signal output from the second logic circuit section. An image forming method employing the photoreceptor is also disclosed. A color filter overlap is formed at the border region between the reflective display region and the transmissive display region.