Abstract: A liquid crystal display device has data signal lines consisting of recurrently formed first, second, and third lines that have open ends and are used for data entry, first diodes formed on the first lines, and second diodes formed on the second lines and having an opposite polarity to the first diodes. In this liquid crystal display device, a test for uneven display of colors is conducted by putting a short-circuiting bar for supplying testing voltages to the data signal lines in contact with the data signal lines.

Abstract: A power operated copyholder is disclosed wherein a face plate, on which one or more copy sheets containing matter to be copied by a typist is mounted, moves upwardly one or more lines at a time while being viewed and copied by the typist. An adjustable line guide remains stationery with respect to the copy matter, and movement of the face plate is controlled by the typist either by hand or by a foot pedal. Spring activated paper holders are provided which are adjustable to suit the width of the copy matter being copied. Tension on the line guide may also be adjusted for the amount of paper being used and is adjustable also for a proper light angle. A novel form of adjustment is also provided for the purpose of adjusting the angle of the face plate with respect to a vertical plane, for the comfort of the typist.