Input method and keyboard based on non-light projection

Abstract

The invention provides an input method and a keyboard based on non-light projection. The method includes that emergent light of a linear laser covers a plane displaying a keyboard pattern in parallel, users touch a key in the keyboard pattern through fingers, the emergent light generates facula at the fingertip of a finger, an image containing the facula is obtained through a camera, a processor receives imaged obtained by the camera and locates the facula, the coordinate of the facula center in a keyboard pattern area coordinate system is converted through the coordinate of the facula center and corresponds the keyboard key number, and the keyboard key the key number corresponds to is the key in the keyboard pattern and touched by the fingers. The keyboard comprises the keyboard pattern used for an inputting operator to touch and the camera to shoot and the linear laser used for generating the emergent light, and the emergent light covers the keyboard pattern in parallel. The input method and the keyboard completely resolve the problem that the traditional keyboard is not waterproof.

Description

technical field [0001] The invention relates to the technical field of keyboards, in particular to an input method based on non-light projection and a keyboard. Background technique [0002] Existing keyboard input devices are roughly divided into the following types: [0003] 1>. The traditional mechanical keyboard, this type of keyboard is realized by hardware circuit, and the corresponding circuit is connected when the button is pressed, so there are many internal electronic circuits and the volume is large. There are disadvantages such as inconvenient to carry, difficult to repair a broken key, need to replace the whole, poor waterproof performance, and relatively high requirements for the use environment. [0004] 2>. The 9-key keypad of the mobile phone: The 9-key keypad is the most common input device for mobile phones, and its principle is to connect the corresponding circuit when the key is pressed. Due to the small number of keys, it is necessary to press t...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the shortcomings of existing PC keyboards that are inconvenient to carry, notebook keyboards have poor waterproof performance, mobile phone keyboards are too small to affect input speed, and optical projection keyboards have high costs, the present invention proposes a non-optical based keyboard that can be widely used in the above platforms. Projection input method and keyboard, the keyboard part is made of waterproof material printed with keyboard patterns, with the assistance of a linear infrared laser, the area where the keyboard is located is automatically positioned through camera image processing, and finger movements are recognized to finally generate a key signal

Images