Home | Demo | Contact  
Knowledge BasesTechnical ServicesDemoContact
 
  Function-Oriented KB
  Domain-Oriented KB
  Why Multimedia KB?
 
  Engineering consulting
  Trend Reports
  For Partners
 
  Knowledge Bases
  Trend Report Example
  Consulting - Case study
 
  Call Me Back
  Order
  Site Map
  Our Services
Building Knowledge Bases
  Order
Fill in the "Order Form" to contact our Sales Department
  Contact
Fill in the "Contact Form" to contact our Marketing Department

Multimedia Knowledge Base Example

<< Back to the List of Technical Solutions
Function-oriented Knowledge Base \ Optical Mouse Cord

Radio wave signals transmit cursor control signals to computer

playpauserewind
Use Play, Pause, Rewind to control the animation of the image.
These controls work for Internet Explorer only. If you use another web browser, right-click the image and select the Play option.
Introduction
A conventional computer mouse is typically connected to a computer via a connection cord. A problem arising from the use of a corded mouse is that the cord often gets in the way, which is annoying. Furthermore, it can be broken or operate in an irregular manner. Because the cord is an indispensable element, the mouse is limited in its operational area. A method of providing a mouse or other pointing device without a corded connection to the computer is needed.
 
Description
To transmit cursor control signals to the computer, the use of radio-wave signals is proposed. Transmitter circuitry installed in a computer mouse contains a transmitting antenna. The host computer is fitted with a receiver that has a receiving antenna. When the user's hand moves the mouse, the transmitter circuitry generates narrow band, low power radio-wave signals. The radio-wave signals contain four position signals that correspond to the movement of the mouse in four orthogonally related directions. A demodulator converts the received radio wave signals into analog mouse data signals. A mouse data decoder converts analog mouse data signals into digital mouse data, which are sent to the input port of the host computer. Thus, radio-wave signals transmit cursor control signals to the computer without a corded connection.
 
Additional information
The bandwidth of the radio-wave signal is approximately 10 to 20 KHz. The maximal power of the radio-wave signal amounts to approximately 1 mW. The maximal usable range of the mouse from the host computer amounts to approximately 5 meters. As a result, the radio-wave signal emitted by the mouse does not interfere with the operation of other electronic equipment in the vicinity.
 
Reference
US Patent 4754268; Link >>
<< Back to the List of Technical Solutions
Home | Knowledge Bases | Services | Demo | Contact | Order | Directory |Site Map
Web design by EffectiveDesign | Search engine - Intellexer | Custom Web Development by EffectiveSoft