Expansion keyboards, electronics and keyboard expansion systems

Abstract

An extended keyboard includes several keys, wherein the extended keyboard also includes several conductive contacts, each key is electrically connected to one or more conductive contacts uniquely and correspondingly, and the several conductive contacts are located on the back of the extended keyboard and are exposed. When the extended keyboard is placed on an electronic device with a multi-touch screen, it is in contact with the multi-touch screen of the electronic device, so that when a key is operated, the conductive contact that is uniquely corresponding and electrically connected to the key will The operation is conducted to the location on the multi-touch screen that touches the conductive contact to which the key is connected. The invention also provides an electronic device using the extended keyboard and a keyboard extension system with the extended keyboard and the electronic device. The electronic device using the extended keyboard and the keyboard extended system provided with the extended keyboard and the electronic device provided by the present invention have simple structure, low cost, and do not cause great influence on the original display of the touch screen.

Description

technical field [0001] The invention relates to a keyboard, in particular to an extended keyboard applied to a multi-point touch screen device, an electronic device using the extended keyboard and a keyboard extended system. Background technique [0002] Currently, portable electronic devices with touch screens are becoming more and more common. When performing key input, the current touch screen usually displays a virtual keyboard for the user to input. However, when the electronic device displays the virtual keyboard, it generally occupies nearly half of the display area of ​​the touch screen of the electronic device, so that the displayed content is greatly reduced, which is not conducive to the user's operation. Now, extended keyboards for portable devices have also appeared. However, the current extended keyboards are usually connected to electronic devices through interfaces such as a USB interface. The structure of the extended keyboard is complicated, requiring corr...

AI Technical Summary

Problems solved by technology

However, when an electronic device displays a virtual keyboard, it generally occupies nearly half of the display area of ​​the touch screen of the electronic device, making the displayed content greatly reduced, which is not conducive to the user's operation.

Now, extended keyboards for portable devices have also appeared. However, the current extended keyboards are usually connected to electronic devices through interfaces such as USB interfaces. The structure of extended keyboards is complicated, requiring corresponding keyboard processing circuits and chips, and the price is relatively expensive.

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