An image forming apparatus includes a counting section, a storage section, a control section, and a driving member control section. One such system utilizes first and second working electrodes to measure analyte or non-analyte related signal, both of which electrode include an interference domain. The user is presented with an initial list of documents of interest from within the corpus on the basis of the initial ranking values. The light diverting layer comprises first light diverting elements disposed on one of a first side of the light diverting layer facing display panel and second light diverting elements disposed on a second side of the light diverting layer facing away from the display panel.