A backlight device includes a backboard having a first portion and a second portion. The invention also provides a coating fluid for forming a photosensitive layer and a method for production thereof, as well as an image-forming apparatus using said electrophoto-graphic photoreceptor. The first and second attachment devices can be detached to detach the two knives from each other. An output driver circuit includes a dynamic portion and a static portion, with the dynamic portion being activated responsive to activation of one of the pull-up and pull-down circuits. Specifically, nucleic acid molecules having the desired predetermined sequence can be sorted from a pool comprising a plurality of nucleic acids having correct and incorrect sequences. A simultaneously captured visual image of the pills enables the pharmacist visually to compare the contents to a library of known visual appearances of the drugs.