Bbc News Update

Top Menu

  • Home
  • Send Us Email

Main Menu

  • Home
  • Auto
  • Business
  • Education
  • Finance
  • Health
  • Home
  • Technology
  • More
    • Law
    • Real Estate
    • Shopping
    • Travel
Sign in / Join

Login

Welcome! Login in to your account
Lost your password?

Lost Password

Back to login

logo

Bbc News Update

  • Home
  • Auto
  • Business
  • Education
  • Finance
  • Health
  • Home
  • Technology
  • More
    • Law
    • Real Estate
    • Shopping
    • Travel
Technology
Home›Technology›A Guide To Touchscreen Technologies

A Guide To Touchscreen Technologies

By Emery Ceila
November 12, 2019
650
0
Share:

A touchscreen is a visual display that can detect the presence and location of a touch to its surface, either from a finger or an object such as a stylus. A number of different technologies are in use on touchscreens, with the technology to a large extent determining suitability for use in particular environments and on what type of device.

Resistive Technology

Two thin conductive layers are separated by a narrow gap. When the outer coversheet layer is touched, it comes into contact with the inner layer – typically a coating on the glass panel. The contact between the two conductive layers is detected and processed to determine the exact location and type of touch (e.g. quick ‘mouse-click’ or prolonged hold). Resistive technology is highly resistant to liquids but the surface layer is vulnerable to damage by sharp objects. Best used with a finger, gloved hand or stylus.

Surface Wave / Surface Acoustic Wave Technology

Ultrasonic waves pass across the surface of the touchscreen panel, with a portion of the wave being absorbed when the screen surface is touched. The change in the ultrasonic waves is registered and the position determined. Not suited to wet environments, since drops of liquid can give false reads. Best used with a finger, gloved hand or soft stylus.

Capacitive Technology

The glass touchscreen panel is coated with a conductive layer. The screen’s electrostatic field is distorted when touched by a finger (since the body is an electrical conductor), allowing the location of the touch to be determined. Various technologies can be used for detection, but they are beyond the scope of this article (e.g. surface capacitance, projected capacitance, self-capacitance, mutual capacitance). Since dependent on the conductivity of the human body, this technology does not work if wearing gloves. This technology is used in many tablet PCs and smartphones, such as the iPad and iPhone.

Acoustic Pulse Recognition Technology

A recent technology, a unique sound is generated based on the position touched on the screen. The sound is picked up by transducers at the corners of the screen and processed to determine the position, by comparison with a pre-recorded sound profile. Background noise does not cause disruption, since it doesn’t match the pre-recorded profiles. The touchscreen surface is glass, so it is durable and is not usually disrupted by scratches or objects such as dust on the screen.

Optical Imaging Technology

With this fairly modern technology, image sensors around the screen detect touching objects and then calculate the position based on readings from multiple sensors. This technology is relatively cheap and works well with larger screens.

Infrared Technology
A frame around the screen contains LEDs with light receptors opposite, with the LEDs being pulsed sequentially to create a scanning grid of infrared light beams. Touching the screen obscures one or more beams, enabling a position to be calculated. Suitable for use with finger, gloved hand or stylus. Dispersive Signal Technology Complex algorithms interpret information from sensors that detect piezoelectricity in the glass panel resulting from a touch of the screen. Since detection is based on pressure, this technology is suitable for use with finger, gloved hand or stylus.

read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more
read more

Previous Article

Property Probate – What’s Probate and How ...

Next Article

Items To Know Out Of Your Criminal ...

Share:

Related articles More from author

  • Technology

    It Forum For Entrepreneurs

    July 16, 2019
    By Emery Ceila
  • Technology

    The Role of Information Technology in Business

    August 7, 2019
    By Emery Ceila
  • Technology

    Powerful SEO Technology Tools and Techniques

    May 8, 2019
    By Emery Ceila
  • Technology

    What’s Website Design on the web?

    May 12, 2020
    By Emery Ceila
  • Technology

    How to get yourself an internet service without any cable or telephone connection?

    August 24, 2021
    By Emery Ceila
  • Technology

    Best Computer Repair – Fast and Flawless

    January 8, 2019
    By Emery Ceila

Comments are closed.

  • Auto

    Ways to get Auto Parts at Great Deals

  • Gambling

    The Liberty of internet Bingo

  • Gambling

    Experience Safe and Fun Gambling Online

  • Recent

  • Popular

  • Comments

  • How to trade CFDs

    By Emery Ceila
    December 14, 2021
  • How to Mine Crypto at Home

    By Emery Ceila
    November 24, 2021
  • The role of betting

    By Emery Ceila
    November 13, 2021
  • Hands valuation in baccarat

    By Emery Ceila
    October 22, 2021
  • Are Worksheets Helpful for Children?

    By Emery Ceila
    September 27, 2021
  • How to trade CFDs

    By Emery Ceila
    December 14, 2021
  • Rent Before You Buy

    By Emery Ceila
    January 10, 2019
  • Discount Auto Parts

    By Emery Ceila
    January 10, 2019
  • Private venture Benefits of Training Employees

    By Emery Ceila
    January 10, 2019
  • 7 Things to Consider When Buying Used Cars

    By Emery Ceila
    January 11, 2019

Recent Posts

  • How to trade CFDs
  • How to Mine Crypto at Home
  • The role of betting
  • Hands valuation in baccarat
  • Are Worksheets Helpful for Children?

Archives

  • December 2021
  • November 2021
  • October 2021
  • September 2021
  • August 2021
  • July 2021
  • June 2021
  • May 2021
  • February 2021
  • January 2021
  • November 2020
  • October 2020
  • September 2020
  • August 2020
  • July 2020
  • June 2020
  • May 2020
  • April 2020
  • March 2020
  • February 2020
  • January 2020
  • December 2019
  • November 2019
  • October 2019
  • September 2019
  • August 2019
  • July 2019
  • June 2019
  • May 2019
  • April 2019
  • March 2019
  • February 2019
  • January 2019

Tags

commercial lease lawyer Parramatta Montague Island tours
  • Send Us Email
© 2021 - Bbc News Update. All Rights Reserved.