How does a television work?
Watching TV and laying on the sofa is very easy. But have you ever wondered that how does a television work? If no, keep reading.
How did old T.V.s work?
Earlier, most of the T.V.s used cathode ray tube principle. First, a device called Camera converts images and sounds into signals and sends it to the transmitters of our T.V.s. The transmitters of our T.V.s are the antennae, dish or dome at the top. These transmitters convert the signals into images and sounds again.
This converted signals enter the cathode ray tube and get converted to electrons. They pass through a special screen and the screen glows in vertical line where the electron has hit. This produces colors: blue, yellow and red, the primary ones. Thus an image is displayed on the screen. Like wisely, many images are rapidly projected on the screen and it looks as if its a moving video. It works just as an electronic flip book.
How do modern T.V.s work?
But now, its quite hard to find such T.V.s. Instead there are LCDs, OLEDs, or plasma T.V.s. They are more digital and compact. Now. How do they work?
LED or OLED T.V.s have a LED display of Light Emitting Diode (LED) display these colorful lights independently flicker according to the signal they receive from the transmitter.
LCDs or Liquid Crystal Displays work with a simple principle of polarization. Now what is polarization. Let's see... Light travels in a straight line but in waves. These waves are not necessarily horizontal, vertical or diagonal. The waves can be any how and even mixed. Such a light is called as non polarized light. But when a vertical polarization filter is added, it filters the light and allows only vertical waves to go front. Similarly horizontal waves pass through horizontal polarization filter. LCD T.V.s have both of them aligned one after the other. But then what about the other waves which aren't vertical or horizontal? These waves pass through liquid crystal and align them selves either vertically or horizontally. Thus a high definition polarized image is been produced.
Posts before October 2021 have been marked as "Old Posts". Less likely, but they might have out dated or incorrect information, ugly looking bits of code, no labels, etc. Don't get me wrong, many of these posts are top-notch and interesting too.
I thought it would be better not to delete or revamp these posts, even if they suck. The bitter truth is that old works always suck, but I take that as a positive tool to convey that I am growing. Besides there's no better way to showcase my journey without these old, messy, poorly written posts!
I thought it would be better not to delete or revamp these posts, even if they suck. The bitter truth is that old works always suck, but I take that as a positive tool to convey that I am growing. Besides there's no better way to showcase my journey without these old, messy, poorly written posts!
Old Post