SCREEN
SCREEN
A screen is a flat or curved surface on which images, text, or video are displayed. Screens are used in a variety of devices, including televisions, computer monitors, smartphones, and tablet computers. They are an essential component in modern electronic devices, providing a visual interface for users to interact with.
Types of Screens[edit | edit source]
Cathode Ray Tube (CRT)[edit | edit source]
The cathode ray tube (CRT) was one of the earliest types of screens used in televisions and computer monitors. CRT screens work by directing a beam of electrons onto a phosphorescent screen, creating images.
Liquid Crystal Display (LCD)[edit | edit source]
Liquid crystal display (LCD) screens are widely used in modern devices. They work by using liquid crystals that align to block or allow light to pass through, creating images. LCDs are known for their energy efficiency and thin profile.
Light Emitting Diode (LED)[edit | edit source]
Light emitting diode (LED) screens are a type of LCD that uses LEDs for backlighting. They offer better brightness and contrast compared to traditional LCDs.
Organic Light Emitting Diode (OLED)[edit | edit source]
Organic light emitting diode (OLED) screens use organic compounds that emit light when an electric current is applied. OLED screens are known for their high contrast ratios and the ability to produce true blacks.
Plasma Display Panel (PDP)[edit | edit source]
Plasma display panel (PDP) screens use small cells containing electrically charged ionized gases (plasma) to produce images. They were popular for large-screen televisions but have largely been replaced by LCD and OLED technologies.
Applications of Screens[edit | edit source]
Television[edit | edit source]
Screens are a fundamental component of televisions, allowing viewers to watch broadcast, cable, or streaming content.
Computers[edit | edit source]
Computer monitors use screens to display the graphical user interface (GUI) of the operating system and applications.
Mobile Devices[edit | edit source]
Smartphones and tablet computers use screens as the primary interface for user interaction, displaying apps, media, and other content.
Digital Signage[edit | edit source]
Screens are used in digital signage to display advertisements, information, and other content in public spaces.
Screen Technologies[edit | edit source]
Touchscreen[edit | edit source]
Touchscreen technology allows users to interact directly with what is displayed on the screen by touching it. This technology is widely used in smartphones, tablet computers, and kiosks.
Retina Display[edit | edit source]
Retina display is a brand name used by Apple Inc. for screens with a high pixel density, making individual pixels indistinguishable to the human eye at a normal viewing distance.
4K Resolution[edit | edit source]
4K resolution refers to screens with a horizontal resolution of approximately 4,000 pixels, offering higher detail and clarity compared to 1080p screens.
See Also[edit | edit source]
- Television
- Computer monitor
- Smartphone
- Tablet computer
- Digital signage
- Touchscreen
- Retina display
- 4K resolution
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Contributors: Prab R. Tumpati, MD
