Abstract: A scanner and a display device. The scanner may include: a mirror positioned on a light path for reflecting light; a mirror holder supporting the mirror; a housing rotatably supporting the mirror holder; a driving unit rotating the mirror holder such that the mirror rotates periodically in an oscillatory manner; a sensing magnet coupled to a rotation center of the mirror holder and rotating in correspondence to a rotation of the mirror holder; and a Hall sensor coupled to the housing adjacent to the sensing magnet for sensing a rotation of the mirror holder. With certain embodiments, the periodical oscillating rotations of the mirror can be detected and used for feedback control, so that the mirror may reflect light with greater stability. Certain embodiments can be used to supplement the driving force of the driving unit, and can prevent noise that may occur during the rotation of the mirror.

Abstract: A printed circuit board is disclosed. An printed circuit board which includes a board part, on one side of which a motor is mounted; and a reinforcement plate joined to the other side of the board part, where a bent portion is formed in at least one end portion of the reinforcement plate, can increase strength and prevent resonance by joining a reinforcement plate having a bent portion at the end portions to a board part.