Search

Recently, the smart switch becomes more and more popular in many applications, for example, the smart home system. Even in some legacy equipments, the switch also is changing from the mechanical contact type to a smart touch style. The touch switch described in this paper has the function of bending and adding. Furthermore, changing the number of switches can be performed without changing the center system. In our previous research, the availability is low because the maximum number of switch is limited which is less than 20. In order to solve this problem, a new touch switch model was proposed. In this study, human body is used as trigger only to activate touch switch but not as a part of closed current circuit for measuring anymore. For determining the touch switch number, DC current is used. The DC current obtains a large and stable current than that of conventional method, and the result is not a ff ected seriously by noise. Benefit from this idea, the accuracy is tremendously improved. The number of switches are able to connect to a single system extends to 400. It is enough for a practical application.

Conventional touch switches are restricted to use on a display, wall or other flat surfaces. Thus, theycannot be applied to many things with any different shapes. In addition, since the traditional touch switch isembedded to a product, the user is unable to change its shape and position after shipment. In this paper, wepropose a touch switch whose shape and location can be arbitrarily changed. Since each touch switch is made ofan electric conductive film like aluminum foil, the touch switches with many different shapes can be put onto anysurfaces. The preliminary experiments show that touch switches made of aluminum foil with different shapes canbe pushed correctly by human finger.