Tv set is a device for displaying images in monochrome (black and white), or in colour, and in two dimensions.A cathode ray tube (CRT) is used to transmit signals electrically to the display. The picture on a CRT is created by lighting up dots on the screen, one at a time, quickly enough that the human eye perceives them as a continuous image. In practice, the images are usually created from two or three electron guns that sweep across the screen in unison to form a raster.A television set has one or more televisions, and functions as a videocassette recorder (VCR), DVD player, home theater system, video game console, or similar device. Television sets are manufactured in a wide range of sizes, but TVs with screens that are 40 inches (102 cm) diagonal and up are the most common.
Remote control is an electronic device used to operate various appliances remotely through electrical or electro-mechanical processes. The term generally refers to a unit featuring buttons, switches, dials or other control elements that are operated by the user.A remote control can be used to operate devices locally at a distance without wires. It may incorporate one or more of several technologies, including infrared (IR), radio frequency (RF), Bluetooth Low Energy (BLE), Wi-Fi and near field communication (NFC).
Although originally remote control was the more common term, many people now use the words “remote” and “control” to describe a device that allows communication for different purposes between two points (the controller and the controlled device), such as an air conditioner or audio equipment. Remote desktop software is also gaining in popularity since it lets IT staff access another computer via the Internet.
Remote controls are commonly used in home theater devices, audio components and video equipment. Modern TV sets (the most common application) typically use one of two different technologies to process their inputs: NTSC (in North America, parts of South America, Japan, Taiwan, Philippines, Australia and some other countries) or PAL/SECAM (in most of the rest of the world).
