CN201302698Y

CN201302698Y - Wireless key-board based on ZIGBEE communication

Info

Publication number: CN201302698Y
Application number: CNU2008202250340U
Authority: CN
Inventors: 刘明霞; 朱向彩; 刘静; 郭小春; 祝爱芬; 杨德运
Original assignee: Taishan University
Current assignee: Taishan University
Priority date: 2008-12-02
Filing date: 2008-12-02
Publication date: 2009-09-02
Anticipated expiration: 2018-12-02

Abstract

The utility model discloses a wireless key-board based on ZIGBEE communication, which comprises a key-board body and an ZIGBEE receiver, when a certain key of a key-board matrix is pressed down, an IO port of a single chip which is connected with the key can detect and generate codes, the codes are converted into radio signals through a ZIGBEE communication module and are transmitted to the ZIGBEE receiver, after the ZIGBEE communication module of the ZIGBEE receiver receives the radio signals, the signals are returned to the codes, and the codes are transmitted to a main board of a computer. The wireless keyboard has the characteristics of low power consumption, low cost, long distance (comparatively to infrared and Blue Tooth), short time relay and high safety.

Description

A kind of Wireless Keyboard based on the ZIGBEE communication

Technical field

The utility model relates to a kind of computer keyboard that uses wireless telecommunications, particularly uses the Wireless Keyboard of ZIGBEE mechanics of communication.

Background technology

The keyboard of computing machine can be divided into wired and wireless at present.Wired keyboard is connected with main frame by cable, moves to be restricted, and or not very convenient under many circumstances.Wireless Keyboard has and much is to use common batteries, adopts infrared or bluetooth communication.In a single day the battery of keyboard does not have electricity, and keyboard will be paralysed; Keyboard must be aimed at main frame when infrared communication requires to receive and sends, the bluetooth communication power consumption is too big.Above problem all can influence the ease for use that Wireless Keyboard uses.

Summary of the invention

At the problem that present computer keyboard exists, the utility model has designed a kind of chargeable Wireless Keyboard of the ZIGBEE of use mechanics of communication.For realizing above purpose, technical solution adopted in the utility model is:

This Wireless Keyboard comprises keyboard body and ZIGBEE receiver, the keyboard body comprises keyboard matrix, single-chip microcomputer, the ZIGBEE communication module, charge management module, indicating lamp module and rechargeable battery, single-chip microcomputer detects the push button signalling and the generating code of keyboard matrix, this code converts wireless signal to by the ZIGBEE communication module and sends to the ZIGBEE receiver, rechargeable battery provides electric energy by charge management module for single-chip microcomputer and ZIGBEE communication module, charge management module drives indicating lamp module and shows charging and use electricity condition that host computer charges to rechargeable battery by charge management module; The ZIGBEE receiver comprises ZIGBEE communication module, USB electricity-fetching module and USB communication modular converter, the ZIGBEE communication module receives the wireless signal that sends of keyboard body, the USB electricity-fetching module can and offer the ZIGBEE communication module and USB communication modular converter from the USB interface power taking of host computer, and the conversion of signals that USB communication modular converter sends the ZIGBEE communication module becomes the USB standard to send host computer to.

Host computer connects charge management module by the usb data line.

Described rechargeable battery is removable Li-Ion rechargeable battery.

The utility model has adopted the ZIGBEE mechanics of communication, has low-power consumption, low cost, remote (infrared relatively and bluetooth), prolongs and characteristics such as high safety in short-term, and therefore under the situation of same charge, the service time of keyboard is longer; The angle that keyboard uses without limits, distance is farther; The key response time-delay is very short, does not have the sensation of viscous; Security is also very high, is not easy to be eavesdropped.The USB charge function that the utility model possesses can solve the power issue of keyboard easily, guarantees not to be subjected in use bothering of dead battery problem.

Description of drawings

Fig. 1 is a structured flowchart of the present utility model;

Fig. 2 is the schematic appearance of the utility model keyboard body.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As shown in Figure 1, the keyboard body comprises keyboard matrix, single-chip microcomputer, ZIGBEE communication module, charge management module, indicating lamp module and Li-Ion rechargeable battery, and the ZIGBEE receiver comprises ZIGBEE communication module, USB electricity-fetching module and USB communication modular converter.

As shown in Figure 2, the keyboard body also has some special features except that possessing all buttons of common computer keyboard.The pilot lamp of keyboard has six, and wherein three is " Num Lock ", " Caps Lock " and " Scroll Lock " pilot lamp that general keyboard all has.Other three is " USB ", " CHR " and " FULL " pilot lamp.Wherein " USB " is used to indicate the power supply status of keyboard, and when electric weight was sufficient, this lamp did not work; When power supply is not enough, this lamp flicker; When keyboard is connected charging by the usb data line with main frame, this lamp Chang Liang.There is a battery case at the back of keyboard body, can place Li-Ion rechargeable battery in the battery case, and cell through lid can be buckled in the battery case, with closing battery.One USB socket is arranged at the keyboard top, when this socket is connected with main frame by the usb data line, can charge the battery.

Charge management module possesses the USB Charge Management, electric weight detects and pilot lamp drives function.When keyboard with after host computer is connected by the usb data line, the USB Charge Management can utilize the voltage of USB interface to give lithium ion cell charging, sends signal to indicating lamp module in the charging process, " CHR " lamp in the pilot lamp is lighted, " FULL " lamp extinguishes.In the charging process, the USB Charge Management can provide energy to Li-Ion rechargeable battery and other modules simultaneously, can not influence keyboard and use.Send signal to indicating lamp module when charging is finished, " FULL " lamp in the pilot lamp is lighted, " CHR " lamp extinguishes; The electric weight measuring ability can regularly detect battery electric quantity, when electric weight is not enough, sends signal to indicating lamp module, " USB " lamp flicker in the pilot lamp.After charging is finished, disconnect being connected of keyboard and host computer, rechargeable battery provides electric energy by charge management module for single-chip microcomputer and ZIGBEE communication module at this moment.

The ZIGBEE receiver can with the communication of keyboard body, its profile and common U are similar, are plugged into the computing machine USB interface by USB plug.The ZIGBEE communication module is used to receive the wireless signal that sends of keyboard body, the USB electricity-fetching module can offer the ZIGBEE receiver from the USB interface power taking of main frame, and USB communication modular converter can become the information translation of ZIGBEE communication module the USB standard to be sent to main frame.

When using this Wireless Keyboard, button detection mode and common keyboard are similar, when a certain button of keyboard matrix is pressed, the IO mouth of the single-chip microcomputer that is attached thereto can detect, single-chip microcomputer can produce one section code in view of the above, and this code converts wireless signal to by the ZIGBEE communication module and sends to the ZIGBEE receiver.After the ZIGBEE communication module that is plugged on the ZIGBEE receiver on the main frame receives wireless signal, restore into code, and be sent to computer motherboard, which button judges what press behind the computer motherboard resolving code is.

Keyboard enters dormant state automatically through after a while when Host Shutdown.When main frame was started shooting, USB interface powered on, activation receiver, and receiver can send to keyboard and wake instruction up, wakes keyboard up.The time-delay of wakeup process is very of short duration, and the user is almost imperceptible.

Claims

1, a kind of Wireless Keyboard based on the ZIGBEE communication, comprise keyboard body and ZIGBEE receiver, it is characterized in that: the keyboard body comprises keyboard matrix, single-chip microcomputer, the ZIGBEE communication module, charge management module, indicating lamp module and rechargeable battery, single-chip microcomputer detects the push button signalling and the generating code of keyboard matrix, this code converts wireless signal to by the ZIGBEE communication module and sends to the ZIGBEE receiver, rechargeable battery provides electric energy by charge management module for single-chip microcomputer and ZIGBEE communication module, charge management module drives indicating lamp module and shows charging and use electricity condition that host computer charges to rechargeable battery by charge management module; The ZIGBEE receiver comprises ZIGBEE communication module, USB electricity-fetching module and USB communication modular converter, the ZIGBEE communication module receives the wireless signal that sends of keyboard body, the USB electricity-fetching module can and offer the ZIGBEE communication module and USB communication modular converter from the USB interface power taking of host computer, and the conversion of signals that USB communication modular converter sends the ZIGBEE communication module becomes the USB standard to pass to host computer.

2, a kind of Wireless Keyboard based on the ZIGBEE communication according to claim 1 is characterized in that: host computer connects charge management module by the usb data line.

3, a kind of Wireless Keyboard based on the ZIGBEE communication according to claim 1, it is characterized in that: described rechargeable battery is removable Li-Ion rechargeable battery.