Stylus and touch input system

摘要

A touch input system including a stylus and a display device is provided. The stylus includes a battery module, a touch portion, a transducer module and a RF transmitting module. When a contact pressure is acted on the touch portion, the touch portion is electrically connected to the battery module by the contact pressure and emits a light signal. The display region receives and reacts to the light signal, and the contact pressure is transformed into an electrical signal by the transducer module. The RF transmitting module is electrically connected to the transducer module and transmitting the electrical signal. The display device includes a display region and a RF receiving module.

主权项

1. A stylus, comprising:
a housing, has a front end, a back end opposite to the front end and an opening formed at the front end; a battery module, disposed in the housing and having a blocking plate facing the front end; a touch portion, sliding disposed at the opening along an axis, wherein the touch portion is suitable for contacting an operation surface to move into the housing; a detector, fixed to the blocking plate and suitable for detecting a motion of the touch portion to obtain an analog signal; a light emitting element, fixed to the touch portion and suitable for moving along the axis by the motion of the touch portion; and an elastic element, disposed between the blocking plate and the touch portion and located on the axis, wherein when the touch portion contacts the operation surface to move into the housing, the elastic element is compressed between the blocking plate and the touch portion, such that touch portion is electrically connected to the battery module and emits a light signal continuously, when the touch portion is distant from the operation surface, the touch portion is recovered by an elastic force of the elastic element, such that the electrical connection between the touch portion and the battery module is terminated, wherein the detector is suitable for detecting a light emitted by the light emitting element, and the light emitted by the light emitting element is suitable for actuating a light sensor disposed at the operation surface.