Types of Monitors and their functions and ap
- 1. E-BUSINESS TECH. BY; Erick Wasonga,Camira ,Abel langa,Fernando Chikanda, Helder Alsio,Marcos,Alistar 1
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- 3. What is a monitor • A computer monitor to be specific is an input device that also allows the user with a output • Originally computers monitors where used for data processing while television sets where used for entertainment • From the 1930s onwards computers, and there monitors have been used for both data processing and entertainment • Modern computer monitors are easily interchangeable with conventional television sets and vice versa • However many computer monitors don’t include integrated speakers so it is not possible to get the TV entertainment experience without external components 3
- 4. The basic components of a computer monitor • Screen the screen is an important part of a monitor • Layered Glass A monitors LCD screen is made up of different layers of glass • Stands Stands are also an important part of the monitor without it the monitor cannot stand • Power connects The power converter is also an important part of the monitor 4
- 5. Basic components (continue) • Interface board the interface is also part of the monitor • Amplifier circuit the amplifier circuit is also a part of a monitor that helps amplify all types of video signals • Reflectors and light sources reflectors and light sources are also a part of a computer monitor using a beam of light 5
- 7. Have you ever wondered which type of monitor are you using to watch TV or playing games? In todays digital world we have seen different types of monitors. We spend most of our time sitting in front of many types of monitors, like playing games, watching movies, and many other things . There are five different types of monitors in todays digital world . They include; 1. LCD monitor 2. LED monitor 3. OLED monitor 4...Plasma monitor 5. CRT monitors 7
- 8. 1.LCD MONITORS LCD is known as “liquid crystal display”. It is the most widely used monitor worldwide, as it requires less space, less power, consumes less energy, and produces relatively less heathen the old CRT monitor. 8
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- 10. 2.LED MONITORS “Light Emitting Diode” is the latest innovation in the market competing with LCD and Plasma monitors. These types of monitors are slightly curved or flat panel display that use light-emitting diodes for backlighting on the screen instead of cold Cathode fluorescent (CCFL) for backlighting. 10
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- 12. 3.OLED MONITORS Organic Light Emitting Diode “as the name suggests it is made of organic materials (such as carbon, plastic, wood, and polymers), that is used to convert electric current into light. This is also the latest display technology used in displays of television, computer screen, game consoles, PDAs, or even in the latest smartphone.it can be thinner or lighter with higher contrast than LCDs. 12
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- 14. 4.PLASMA MONITORS Plasma Monitor panel is made up of plasma technology which is another innovation in computer monitor technology. Dispaly of plasma is made with cells. These cells are filled with “electrically changed ionized gas “Such cells are called plasma. 14
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- 16. 5.CRT MONITORS Here CRT means “Cathode Ray Tube”. Its main part is cathode ray tube which is called the “Generally picture Tube “. 16
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- 19. Display modes The term display mode refers to the characteristics of a computer display, in particular the maximum number of colors and the maximum image resolution in pixels horizontally by pixels vertically. 19
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- 21. TYPES OF DISPLAY MODES: 21 ENHANCED GRAPHICS ADAPTER(EGA) The Enhanced Graphics Adapter (EGA) display was introduced in 1984 by the IBM. It allowed up to 16 different colors and offered resolution of up to 640 x 350. This improved the appearance over earlier displays, and made it possible to read text easily.
- 22. VIDEO GRAPHICS ARRAY(VGA) • In 1987, IBM introduced the Video Graphics Array (VGA) display system. This has become the accepted minimum standard for PCs. Some VGA monitors are still in use today. The maximum resolution depends on the number of colors displayed. You can choose between 16 colors at 640 x 480, or 256 colors at 320 x 200. 22
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- 24. EXTENDED GRAPHICS ARRAY In 1990, IBM introduced the Extended Graphics Array (XGA) display . XGA offers 800 x 600 pixel resolution in true color (16 million colors) and 1024 x 768 resolution in 65,536 colors. These two image resolution levels are perhaps the most popular in use today by individuals and small businesses. 24
- 25. SUPER VIDEO GRAPHICS ARRAY The Video Electronics Standards Association (VESA) introduced the Super Video Graphics Array (SVGA) displays, which can support a palette of up to 16,000,000 colors, although the amount of video memory in a particular 25
- 26. SUPER EXTENDED GRAPHICS ARRAY The Super Extended Graphics Array (SXGA) it’s specifications are generally used in reference to screens with 1280 x 1024 resolution 26
- 27. ULTRA EXTENDED ARRAY The Ultra Extended Graphics Array (UXGA) refers to a resolution of 1600 by 1200. 27
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- 29. QUALITY FACTORS OF A MONITOR • * RESOLUTION *BANDWITH *SIGNAL QUALITY *CABLE & CONNECTOR QUALITY *SHARPESS & FOCUS *ELECTRONIC COMPONENT STABILITY 29 RESOLUTION&SCREEN SIZE *BRIGHTNESS *HDR SUPPORT
- 30. Touchscreen • 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. The display is often an LCD, AMOLED or OLED display while the system is usually a laptop, tablet, or smartphone. • A user can give input or control the information processing system through simple or multi touch gestures by touching the screen with a special stylus or one or more fingers. Some touchscreens use ordinary or specially coated gloves to work while others may only work using a special stylus or pen. The user can use the touchscreen to react to what is displayed and, if the software allows, to control how it is displayed; for example, zooming to increase the text size. • The touchscreen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or other such devices (other than a stylus, which is optional for most modern touchscreens). 30
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- 32. Types of touch screen monitors Resistive touch screen Resistive Touch is the most widely touch technology in use today. A resistive touch screen monitor is composed of a glass panel and a film screen, each covered with a thin metallic layer, separated by a narrow gap. When a user touches the screen, the two metallic layers make contact, resulting in electrical flow. The point of contact is detected by this change in voltage. 32
- 33. Surface acoustic wave surface acoustic wave (SAW) technology uses ultrasonic waves that pass over the touchscreen panel. When the panel is touched, a portion of the wave is absorbed. The change in ultrasonic waves is processed by the controller to determine the position of the touch event. Surface acoustic wave touchscreen panels can be damaged by outside elements. Contaminants on the surface can also interfere with the functionality of the touchscreen. 33
- 34. Projected Capacitive Touch Screen Projected Capacitive (P-Cap) is similar to Surface Capacitive, but it offers two primary advantages. First, in addition to a bare finger, it can also be activated with surgical gloves or thin cotton gloves. Secondly, P-Cap enables multi-touch activation (simultaneous input from two or more fingers). A projected capacitive touch screen is composed of a sheet of glass with embedded transparent electrode films and an IC chip. 34
- 35. Thank you!! “Technology is nothing .What is important is to have faith in people ,that they are basically good and smart , if you give them tools ,They’ll do wonderful things with them.” ~STEVE JOBS~ 35