Active pen for touch module, touch input system and driving method of active pen

Abstract

The invention discloses an active pen for a touch module, a touch input system and a driving method of the active pen. The active pen comprises a gravity induction part, an amplifying circuit connected with an output end of the gravity induction part and a signal emission part arranged at a nib of the active pen and connected with an output end of the amplifying circuit, wherein the gravity induction part is used for outputting a corresponding gravity induction output signal according to an included angle between the active pen and the horizontal plane; the amplifying circuit is used for amplifying the gravity induction output signal at corresponding multiple; and the signal emission part is used for sending the amplified signal to the touch module. According to the invention, based on the principle of gravity induction, the change of signal output can be realized through changing the included angle between the active pen and the horizontal plane, namely, the output signal is changed along with the change of the tilt angle of the active pen, so as to provide handwritings at different degrees of thickness and realize difference of line width; in addition, the nib of the active pen can be made of materials without any requirement, thereby lowering the cost.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an active pen for a touch module, a touch input system and a driving method thereof. Background technique [0002] With the explosive growth of smartphones and tablet computers, touch screens have been widely used in daily life. More and more applications require higher-precision touch. Due to thicker fingers, it is difficult to touch screens on smaller screens. Accurate writing and fast writing are performed on the screen, so the use of stylus for touch screens is gradually widespread, and the performance requirements for stylus are also getting higher and higher. [0003] Styluses for touch screens mainly include passive pens and active pens. Among them, the function of the passive stylus is equivalent to that of a human finger. When the passive stylus touches the touch screen, a small part of the current flows from the touch point into the passive stylus, which is equivalent...

AI Technical Summary

Problems solved by technology

However, the active pen has high requirements on the material of the pen tip, and the corresponding cost is very high; moreover, the pen tip of the active pen is easy to cause physical damage to the touch screen, and is easy to damage the surface structure of the touch screen

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