{"id":23680,"date":"2024-12-25T09:05:32","date_gmt":"2024-12-25T06:05:32","guid":{"rendered":"https:\/\/componentbyozdisan.com\/?p=23680"},"modified":"2025-02-03T09:07:10","modified_gmt":"2025-02-03T06:07:10","slug":"what-is-lcd","status":"publish","type":"post","link":"https:\/\/componentbyozdisan.com\/en\/what-is-lcd\/","title":{"rendered":"What is LCD?"},"content":{"rendered":"
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\"LCD<\/figure>\n<\/div>\n\n\n

What is LCD?<\/strong><\/strong><\/h2>\n\n\n\n

LCD is the abbreviation of Liquid Crystal Display. It is a flat panel display technology used today in TVs and computer monitors, as well as mobile phones. LCDs are completely different from the old CRT (Cathode Ray Tube) displays in that they use liquid crystals instead of cathode ray for their primary mode of operation.<\/p>\n\n\n\n

An LCD screen consists of millions of pixels made of crystal and arranged in a rectangular grid. The LCD has backlight elements that provide light to each pixel. Each pixel has red, green and blue (RGB) sub-pixels that can be turned on and off. When all the sub-pixels are off it becomes black, and when all the sub-pixels are 100% on it becomes white.<\/p>\n\n\n\n

LCD Panel Structure<\/strong><\/strong><\/h2>\n\n\n\n

An LCD is a combination of two substances, solid and liquid. The solid part is crystal, and with this liquid the crystal forms the visible image. The LCD consists of two layers: Two polarized panels: Filters and electrodes. The LCD screen works by \u201cblocking\u201d light instead of \u201cemitting\u201d it. There are two types of pixel grids in LCD:<\/p>\n\n\n

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Active Matrix:<\/strong> This is a newer technology. This technology is used in smartphones equipped with an LCD screen.<\/p>\n\n\n\n

Passive Matrix:<\/strong> This is an older technology. Some older devices have used this technology previously.<\/p>\n\n\n\n

LCD Types are divided into 4:<\/strong><\/p>\n\n\n\n

Twisted Nematic (TN):<\/strong> It is cheap but offers fast response times. On the other hand, TN displays have low contrast ratios, narrow viewing angles and low color contrasts. The use of TN LCDs in different types of displays in many industries has increased their production.<\/p>\n\n\n

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\"LCD<\/figure>\n<\/div>\n\n\n

In-Plane Transition Screens (IPS Panels):<\/strong> Compared to TN LCDs, IPS Panels have much higher contrast ratios, wide viewing angles and color contrasts. Compared with TN LCDs, IPS displays provide superior image quality, bright color accuracy and distinctiveness.<\/p>\n\n\n

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Vertical Alignment Panels (VA Panels):<\/strong> They offer a \u201cmedium level of quality\u201d between TN and IPS displays. Vertical alignment panels are considered as a good compromise between in-plane transition panels and twisted nematic technology. Compared with TN type displays, these panels have higher quality color reproduction and the best viewing angles.<\/p>\n\n\n

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Advanced Fringe Field Switching (AFFS):<\/strong> It shows the best performance in the color production range, compared to that of IPS displays. AFFS LCD offers the best performance with a wide range of color reproduction. These monitors produce high-quality images. These screens are often used in high-tech applications, such as those in aircraft cockpits.<\/p>\n\n\n\n

LCD \u00c7al\u0131\u015fma Prensibi<\/strong><\/h2>\n\n\n
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\"LCD<\/figure>\n<\/div>\n\n\n

The basic principle of LCDs is that liquid crystals reveal a certain color by switching the pixels on and off. When electric current is applied to a liquid crystal molecule, the molecule tends to bend. This causes a change in the angle of the upper polarized filter and the angle of light passing through the polarized glass molecule. As a result, there is a small amount of light that allows polarized glass to pass through a certain area of the LCD. Therefore, this area will look dark compared to other places. LCDs work on the principle of \u201cblocking\u201d light instead of \u201cemitting\u201d it. When LCDs are built, a mirror is placed on the back side. The electrode plane at the top of the device is made of indium-tin oxide. At the bottom of the device, on the other hand, is a polarized glass with polarized coating.<\/p>\n\n\n\n

The entire LCD should be coated using a common electrode, and the liquid crystal substance should be located on it. After that, there is another polarized film on top and a second piece of glass with electrodes, rectangular in shape, on the bottom. However, it is necessary to make sure that both parts are at the right angles. When there is no current, the light passes in front of the LCD, is reflected, and then re-reflected with the help of a mirror. In front of the light there is a screen consisting of red, green and blue pixels. To bring out a certain color or keep pixel dark, liquid crystals switch a filter on and off.<\/p>\n\n\n\n

Advantages of LCD:<\/strong><\/strong><\/h2>\n\n\n\n