These electrons emitted from the electron gun are negatively charged while the anode following the electron gun is positively charged. Hence negatively charged particles are attracted towards the anode that is positively charged.
That electron beam passes through the vertical and horizontal plates to strike the fluorescent screen. The fluorescent screen has phosphors dots on it of three different colors; red, green and blue. These are the primary colors while all the other secondary colors are made by combining these basic colors.
When the electron beam emitted from the electron gun strikes the phosphors dots, these dots glow. That glowing of colors makes the picture to be visible on the monitor screen. Usually CRTs are bulky, high weighted and have larger infrastructure as compared to LCDs which are not that much bulky.
These monitors consume more power to operate. It has a crystal like looking liquid present inside of it. To understand the complete working of LCD, we need to look at its internal structure. The back lights are generated at the bottom of the computer monitor.
Then at the above side, there exists an element with several layers. Because of that element and its several layers, the light is evenly spread over the whole LCD and it starts glowing. The secret however is the glass panel at the top of that element. That glass panel has two layers that are aligned perpendicular to each other. The light passes vertically through that panel.
Glass panel layers cannot align the direction of light. Therefore a crystal liquid is present between the two layers of glass panel. That liquid makes it sure to let the light pass only vertically when it reaches the screen. Those colors are red, green and blue.
These are primary colors while the rest of all the colors are made by combining these three colors. It permits the display to be very thin and thus supports numerous applications.
Among different liquid crystals, we prefer a nematic type liquid crystal display that is twisted at an angle of 90 degrees. When we talk about LCD then its principle of working is such that light energy is not produced by LCD, despite light energy generated by an external source is controlled in order to have light or dark appearance at some particular areas.
Here, a layer of liquid crystal is placed between 2 polarizing films. When light emitted by an external source falls on the layer of liquid crystal then their combination generates a coloured visible image that is displayed on the screen. A backlight present at the back end of the screen emits light that after passing through the polarizing film gets polarized. The light can be horizontally or vertically polarized that rely on the type of polarization filter.
An external potential is provided to the liquid crystal. This potential changes the orientation of the molecules. After this polarized light is passed to the crystal that generates bright and dark spots at the screen of the display. Despite LCD is more costly than CRT but due to its better image display and almost negligible flickering property, it is widely used.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. A Cold cathode ray, the fluorescent panel are two major components of the LCD. The cold cathode ray technology is used in LCD which emits electrons and light up the fluorescent coated monitor screen.
The process is known as backlighting. The second component is a fluorescent panel, which is made of liquid crystal. Liquid Crystal determines is current sensitive and determines the number of electrons to pass through the screen to make the shape and image of an object. The large screen area makes it perfect for playing games, watching movies while the size of the CRT monitor is always less than the specified size on the paper as its frame around the glass screen covers more than one-inch space.
The flat Screen screen displays the perfect image while its harmless for the eyes as it emits very small part of the radiation. The feature of an auto button lets the user resize the screen size to make images sharp and flexible. The both monitors are based on the same display technology and provide better resolution. The backlighting impacts badly on the image and decreases its sharpness and brightness.
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