Switch structure and optical pen having the same

Abstract

The invention discloses a switch structure and an optical pen having the same. The switch structure includes a first body, a second body, a detector and a control unit. The first body includes a first electrical conducting ring and a second electrical conducting ring which are not connected, wherein the second electrical conducting ring is located on the inner ring of the first electrical conducting ring. The first electrical conducting ring is connected to a first signal source, and the second electrical conducting ring is connected to a second signal source, wherein the first signal source is different form the second signal source. The second body includes a third electrical conducting ring, and the maximum distance between the first electrical conducting ring and the second electrical conducting ring is less than the difference between the outer diameter and the inner diameter of the third electrical conducting ring. The detector is used to detect signals from the first electrical conducting ring and signals from the second electrical conducting ring. The control unit receives the signals detected by the detector, and controls the switch-on and switch-off of the switch structure. When the third electrical conducting ring is contacted with the second electrical conducting ring and the first electrical conducting ring at the same time, the signals from the first electrical conducting ring or the signals from the second electrical conducting ring are changed, and the switch structure is switched on. According to the invention, the trigger dead space problem of an optical pen can be improved, and the quality of the optical pen is improved.

Description

technical field [0001] The present invention relates to a switch structure and an optical pen with it, and particularly relates to an optical pen capable of writing or drawing on a projection screen. Background technique [0002] Projectors have the advantages of large screen and small size, and the brightness and resolution of projectors have been greatly improved in recent years, making projectors more and more popular in office presentations and home theaters. During the user's briefing process, it is often necessary to make some annotations on the slide. The more commonly used method at present is: use the mouse or keyboard to make annotations on the slides on the computer. However, this method will modify the content of the slide, and the annotations that can be made are limited by the functions of the presentation software. For example, when the presentation software is switched to the playback mode, it cannot perform editing actions. Even if it can be edited, it can...

AI Technical Summary

Problems solved by technology

However, the trigger mechanism of the pen head of the projector optical pen currently on the market is an electronic trigger mechanism using four touch switches. Since the trigger of the four trigger switches will have dead angles, such as the setting positions of the four trigger switches are respectively located on the circuit board. There are four positions: up, down, left, and right. If the pen head is pressed to the upper left, upper right, lower left, and lower right, the trigger switch will not be triggered, resulting in the optical pen being unusable.

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