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Output Devices :Computer Monitors

 A computer monitor is an output device that displays information in pictorial or textual form. a device that displays signals on a computer screen.

                                                   The types of monitors:

  • 1. LED Monitors
  • A conventional LED monitor uses light-emitting diodes to emit light when a current runs through it. This then provides the backlight for a liquid-crystal display (LCD) screen and lights up the individual pixels, providing the image that a user sees

  • 2. OLED Monitors
  • Organic light-emitting diode (OLED) screens are the only screens in this comparison that do not use backlights. 
  • OLED technology is used in commercial  applications such as displays for mobile phones and portable digital media players, car radios and digital cameras among others, as well as lighting.

  • 3. DLP Monitors




  • Data Loss Prevention (DLP) Monitor is a high-performance data loss prevention solution that can analyze all Internet communications and determine if the information is going where it shouldn't.
  • DLP is used in a variety of display applications from traditional static displays to interactive displays and also non-traditional embedded applications including medical, security, and industrial uses.

  • 4. TFT Monitors



  • As a display device, TFT stands for Thin Film Transistor and is used to enhance the operation and usefulness of LCD displays.
  • TFT displays are found in many applications these days, from mobile devices, appliance, medical devices, instrumentation,aircraft and certainly computer display as well as Tv's.

  • 5. Plasma Screen Monitors
    A plasma display panel (PDP) is a type of flat panel display that uses small cells containing plasma
  • uses plasma, an electrically charged ionized gas, to illuminate each pixel in order to produce a display output.

6. Cathode Ray Tube (CRT) Monitors

A cathode-ray tube (CRT) is a  vacuum tube one or more electron guns ,which emit electron beams that are manipulated to display images on a phosphorescent screen.  
The images may represent electrical waveforms,pictures,radar targets, or other phenomena.


7. Flat Panel Monitors


A flat-panel display (FPD) is an electronic display used to display visual content such as text or images. It is present in consumer, medical, transportation, and industrial equipment.

Flat-panel displays are thin, lightweight, provide better linearity, and are capable of higher resolution than typical consumer-grade TVs from earlier eras. They are usually less than 10 centimeters (3.9 in) thick. While the highest resolution for consumer-grade CRT televisions was 1080i, many flat-panel displays in the 2020s are capable of 1080p and 4K resolution.


8. Touch Screen Monitors



A touchscreen or touch screen is the assembly of both an input ('touch panel') and output ('display') device. The touch panel is normally layered on the top of an electronic visual display of an information processing system.
  Touch Screen monitors is used to input and receive information from a single peripheral device, usually a laptop touch screen monitor.
Disadvantages of LED Monitors:
  • LEDs are more expensive than conventional lighting technologies.
  • LEDs can shift color due to age and temperature.
  • LED is a lot thinner than LCD or Plasma.
  • Contrast ratios are not consistent.
  • Much higher price.
Advantages of LED Monitors:
  • Slim Design.
  • Brighter and sharper Images.
  • Better Color.
  • Flicker-Free Images.
  • Better Picture Quality(true black picture)
  • No motion delay and lags.
  • Longer lifespan and less environmental impact.
  • Lower Power Consumption.

the disadvantages of OLED Displays:
  • As they are made of organic material, they have shorter lifespans as compared to LCD displays.
  • They are not very bright, therefore it's hard to use them under direct sunlight.
  • The OLED production process is very costly compared to LCD displays.

Advantages of OLED monitor:
  • Superior viewing angle.
  • High brightness and contrast.
  • Fast response time.
  • Small size form factors.
  • Well suited for battery-driven applications.

Advantages and disadvantages of DLP systems
  • Prevent data-related incidents caused by insiders.
  • Comply with cybersecurity requirements, laws, and standards.
  • Improve visibility and control over the organization's data.
  • Definitively authenticate each user before data is accessed.
Disavantages of TFT monitor:
  • Higher price point than other displays.
  • Disproportionate viewing angles.
  • Restricted utility due to glass paneling (e.g., ineffective for outdoor use where 
  • glass can showcase glares from natural lighting)

Advantages of TFT monitors:
  • Minimal energy consumption.
  • Sharp visibility.
  • Excellent physical design.
  • Fast and accurate response time.
  • Minimizes eye strain.
  • Space-efficient design (can be placed anywhere in your workspace on a rotational mount so you can turn it in all directions)

Disadvantages of plasma display :
  • Commonly do not come in smaller sizes than 40 inches.
  • Heavier in weight with respect to screen size.
  • A picture is not so clear under bright conditions.
  • Glass screen damage can be permanent and far more difficult to repair.
  • Poor reproduction of black.
  • Radiation is emitted from the screen
Advantages of plasma display :
  • Can be wall mounted.
  • Less bulky than the rear projection television.
  • Virtually less motion blur, so better motion tracking like high refresh rates and faster response time.
  • Far wider viewing angle.
  • More pixels per inch.
  • Superior contrast ratio so that capable of producing deeper blacks.

Disadvantages of CRT :
  • Big back and take up space on a desk.
  • Not suitable for a very bright environment because less bright than LCD.
  • They are large, heavy, and bulky.
  • Consume a lot of electricity and also produce a lot of heat.
  • Geometrical error at edges.
  • Flickering at 50-80 Hz.
  • Harmful DC and AC electric and magnetic fields.
Advantages of CRT :
  • Less expensive than other display technology.
  • Fast response time.
  • It can operate at any resolution, geometry, and also for aspect ratio without the need for rescaling the image.
  • The highest pixel resolutions are generally available.
  • They produce more colors.
  • CRT is also suitable for use even in dim or dark light.

Disadvantages of Flat Panel monitors:
  • They are very expensive compared to CRTs.
  • They have very high refresh rates.
  • Slow response times.
  • They may be heavier and bulkier than other display types.
Advantages of Flat Panel monitors:
  • Flat Panel Devices like LCD produces high-quality digital images.
  • Flat Panel monitors are stylish and have a very space-saving design.
  • Flat Panel Devices consume less power and give maximum image size in minimum space.
  • Flat Panel Devices use its full-color display capability.

Disadvantages of Touch Screen Monitors:

Accuracy and precision depend on the size of the icons. When icons are very small, it may be difficult to activate the same with the help of large fingers.

➨It requires the proximity of the user to operate. The user must be within reach of the touchscreen display.
➨Hands and fingers often obscure the screen information while selecting the desired options.
➨Battery operated touch screen devices consume more power.
➨It is difficult to operate by visually impaired people. They can interact based on tactile or braille input.

Advantages of Touch Screen monitors:

  • Simple clear interface. One of the most obvious benefits of touchscreen technology is its easy-to-use nature. ...
  • Engaging & Interactive. ...
  • Self-Service Features. ...
  • Improve Accessibility. ...
  • Reduce Staff Costs. ...
  • 24 x7 service. ...
  • Easy to Clean & Maintain. ...
  • Durability

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