Non-contact type small size keyboard

A non-contact, keyboard technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve complex and difficult-to-use problems, prevent contact transmission, avoid wear and tear, and solve the problem of heavy keys Effect

Inactive Publication Date: 2011-09-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese invention patent CN101013346A discloses a non-contact holographic keyboard device with confidentiality and cleaning functions, which belongs to the non-con

Method used

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  • Non-contact type small size keyboard
  • Non-contact type small size keyboard
  • Non-contact type small size keyboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: see figure 1 with figure 2 As shown, a non-contact keyboard uses Freescale's 32-bit USB chip MCF52223 as the main control chip, and controls the MC34940 sensor chip through three chip selection lines (A, B, C). The MC34940 pin 7 and the MCF52223 chip A / D acquisition pins are connected. The entire design can be used as a single keyboard, or as a USB device plug-and-play combined with a USB host device (such as a computer). 7 "buttons" can be provided through the 7 electrodes of the MC34940 chip.

[0021] This kind of keyboard can be pressed as a key within a distance of 1-10mm through software programming, so that no direct contact is required. It can be applied to various occasions, especially suitable for occasions such as elevator buttons, ATM machine buttons, staircase lighting buttons and the like that require a small number of buttons but have high requirements for public health.

[0022] The non-contact keyboard designed by the method can work...

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PUM

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Abstract

The invention discloses a non-contact type small size keyboard which comprises a plurality of key positions, a sensing module and a processing module, wherein the processing module comprises an embedded type microcontroller circuit; a keyboard output port is arranged in the microcontroller circuit; the sensing module is a capacitance sensing module; and each key position comprises at least one sensing electrode of the capacitance sensing module. The non-contact type keyboard is realized by using a capacitance sensing device. Because the contact is unnecessary, the mechanical keyboard abrasion is avoided and the bacterium is efficiently prevented from being spread in contact manner. The non-contact type small size keyboard is specially fit for various applications in public places.

Description

technical field [0001] The invention relates to an input device of a computer system, in particular to a non-contact input keyboard, which can be used as an input device in general computers and various embedded systems. Background technique [0002] Due to the existence of the mechanical structure, especially the elastic return device, the traditional mechanical keys are easy to be damaged after long-term use. In order to solve the above problems, an inductive keyboard has occurred. For example, Chinese invention patent application CN101334705A discloses a method for inputting control commands using a touch-sensitive keyboard and a mobile terminal. However, the sensing method adopted is a contact sensing method, which requires the user's fingers to touch the keyboard. [0003] However, in public places, especially in places such as hospitals, if you use a traditional keyboard, you need to touch it with your hands, which will easily lead to the spread of germs. With the ap...

Claims

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Application Information

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IPC IPC(8): G06F3/044G06F3/048G06F3/0489
Inventor 王宜怀陈建明吴瑾
Owner SUZHOU UNIV
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