Optical imaging technology is a new type of touch technology suitable for medium and large size touch screens developed in recent years. Its working principle is to place two cameras on the adjacent corners of the touch screen, and continuously capture the movement of objects on the touch surface through the camera. The effect on infrared rays is used for positioning. When an object on the touch surface is clicked or moved, the camera quickly determines the touch position according to the occlusion condition of the object, thereby accurately determining the touch point or analyzing the touch gesture to achieve the corresponding functional operation.
Since the fundamental technical principle of optical image touch technology is to determine the touch position by light occlusion, and all the electronic components are concentrated on one frame of the touch screen, it has the characteristics of adaptability, durability, cost control, etc. of the touch object. The advantages that other touch technologies do not have, in general, can be summarized into three advantages.
First, optical image touch technology enables multi-touch. The emergence of touch operations frees people from the mouse and keyboard, and users can communicate with the machine using their most familiar body language. However, the traditional single-touch is simply to record the click position or the motion track. For a slightly more complicated operation, it is necessary to select through the layer menu. The appearance of multi-touch completely releases the operator's limbs, and the user can complete commands such as dragging, zooming, and rotating by gestures. With the popularity of multi-touch applications in consumer electronics, multi-touch technology has become an indispensable element in enhancing the human-computer interaction experience.
Secondly, since the optical imaging technology determines the coordinate value by intercepting the light source by moving the object, the touch position can be determined, so that the touch of any opaque object can be realized, and no special writing pen or other recognition hardware is needed, and the touch surface is not required to be pressed. . The user can write and operate by raising his hand, which greatly improves the quality of the use experience.
Optical imaging technology Touch products have a very important advantage over other technology types, that is, they have obvious cost advantages in large-size products. Since the main components of optical imaging technology are two cameras, as the size of the product increases, the cost of the touch screen does not increase significantly, compared with the cost of other touch technologies as the size increases squarely or linearly, optical touch technology Enjoy a considerable cost advantage. In addition, since all the electronic components of the optical image touch screen are concentrated on one frame of the touch screen without any film or other complicated component distribution, the optical imaging technology touch product has key indexes such as durability and transparency. A big leap.
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