In radio communication there is only audio signal is transmit.So we can only listen the the sound signal .But in Television system we can listen and see video or picture. Here are two type of signal is used i.e sound signal and video signal.So it is so complex than radio communication system in both transmitter side and receiver side.It should transmit both sound signal and video signal and received both signal.In this system monitor is used to display the image or video signal , and loudspeaker is used in out put to produce sound signal.
Television means ,tele refer' far' and vision refer 'to see' .There are followings type of display units:
Television means ,tele refer' far' and vision refer 'to see' .There are followings type of display units:
- Cathode ray tube (monitor)
- LCD(liquid crystal display)
- Matrix display
- Plasma type display
In cathode ray tube ,it contains electric gun to produce electron,accelerator ,deflection coil( i.e horizontal deflection and vertical deflection) to synchronize the the picture in the monitor ,phosphorous coatings to produce light according to input signal of it .It is cheaper than other display unit ,because it consume more power , picture quality is low ,low durable etc.
In LCD system it is very popular now a days ,Because of its properties i.e it consume low power ,high durable and good picture quality ,but its prise is high than cathode ray tube .It contains polarizing liquid ,crystal elements,LCD monitor internal power supply board contain bridge rectifier,Capacitor filter,schoctky diode,SMPs transformer ,output capacitor filter,fuse Ic power, optoisolator.
Matrix display is like calculator display using matrix technology .It is similar to LCD and plasma type display also.In this type of display overcome some of the drawback of both LicquidCrystal Displays and Cathode Ray Tubes .We can manufacture in large size (upto 50 inechs).Wide range of horizontal and vertical viewing angles, Although sharply focused image with the more colours ,it consume more voltage.
In LCD system it is very popular now a days ,Because of its properties i.e it consume low power ,high durable and good picture quality ,but its prise is high than cathode ray tube .It contains polarizing liquid ,crystal elements,LCD monitor internal power supply board contain bridge rectifier,Capacitor filter,schoctky diode,SMPs transformer ,output capacitor filter,fuse Ic power, optoisolator.
Matrix display is like calculator display using matrix technology .It is similar to LCD and plasma type display also.In this type of display overcome some of the drawback of both LicquidCrystal Displays and Cathode Ray Tubes .We can manufacture in large size (upto 50 inechs).Wide range of horizontal and vertical viewing angles, Although sharply focused image with the more colours ,it consume more voltage.
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