The LCD TV is believed to be familiar to everyone, but what is an LCD TV? do you know? Today Xiao Bian gave everyone a detailed introduction on what LCD TVs are and the advantages and disadvantages of LCD TVs. It helps everyone to fully understand LCD TVs and easily purchase LCD TVs suitable for them.
What is LCD TV
Liquid crystal display, referred to as LCD (Liquid Crystal Display). LCD, full name "Liquid Crystal Display", translated as liquid crystal display, referred to as "liquid crystal display."
Liquid crystal is a substance between solid and liquid. It is an organic compound having a regular molecular arrangement. If it is heated, it will assume a transparent liquid state. Cooling it will result in a cloudy solid state of crystal particles. Because of its characteristics, it is called Liquid Crystal.
The advantages and disadvantages of LCD TVs
advantage
Lightweight and portable
Since the conventional display uses the CRT, electron beams must be emitted from the electron gun to the screen. Therefore, the neck of the picture tube cannot be made short. When the screen is increased, the size of the entire display must also be increased. The liquid crystal display monitors the state of the liquid crystal molecules through the electrodes on the display screen to achieve the display purpose. Even if the screen is enlarged, its volume will not increase proportionally (only increasing the size does not increase the thickness, so many products provide a wall-hanging function, allowing The user saves space more, and is much lighter than traditional displays with the same display area. The weight of a liquid crystal television is about 1/3 that of a conventional television.
Resolution and clarity
The liquid crystal display uses a flat glass plate from the outset, and its flat right-angle display looks much better than the conventional display. However, in terms of resolution, the liquid crystal display can theoretically provide higher resolution, but the actual display effect is much poorer (there is a problem with the best resolution), although the LCD TV can overcome the jitter and flicker of the scan line, but Because the gap of the liquid crystal itself is thicker, it will cause the image to look like a grid. Therefore, the best resolution of the LCD screen can reach 1024X768 (which is enough). The traditional display achieves a perfect display effect with the support of a better display card.
Green
The liquid crystal display has no radiation at all, and only a small amount of electromagnetic waves from the drive circuit can be excluded by simply sealing the housing. Therefore, the liquid crystal display is also called a cold display or an environmentally friendly display. There is no screen flicker in LCD TVs and it is not easy to cause visual fatigue.
Low power consumption
In accordance with industry standards, the use of time for the annual power consumption of 4.5 hours conversion, with a 30-inch LCD TV instead of 32-inch CRT TV, each year can save energy 71 kilowatts.
Shortcomings
1, in the display reaction speed, the traditional display due to technical advantages, the reaction speed is very good. TFT liquid crystal displays are less optimistic because of the display characteristics (low temperature does not work properly, and there is a reaction time). The LCD has a long response time and therefore does not perform well in dynamic images.
2. Display Quality: The display screen of the conventional display uses phosphor, which is displayed by the electron beam striking the phosphor, and thus the brightness of the display is brighter than the translucent display of the liquid crystal (using the fluorescent lamp as the light source). The LCD theoretically only lasts 18 bits (approximately 262144 colors), but the color depth of a CRT is almost infinite.
3. The viewing angle of the LCD is relatively small compared to the CRT display.
4, LCD display is relatively fragile and vulnerable to damage. This increases the difficulty of using and maintaining the LCD TV.
5. Liquid crystal is an organic compound with a regular molecular arrangement between solid and liquid. Under the action of different current electric fields, the liquid crystal molecules will be regularly rotated by 90 degrees to produce a difference in transmittance. This will produce a difference between light and dark when the power is turned ON/OFF. By controlling each pixel according to this principle, the desired image can be constructed. . LCD TV is made using this principle. But precisely because of this principle, all LCD TVs are difficult to make in the process, and they are expensive.
6, the manufacturing process determines the presence of point defects in the LCD, the relatively low yield of its manufacturing, which also increases the LCD manufacturing costs to a certain extent. Therefore, the price is the biggest obstacle to LCD promotion. Sometimes a good 17" LCD will cost more than 20,000 yuan, which is a price for a CRT but a 21" flat display.
Understand what are the advantages and disadvantages of LCD TVs and LCD TVs. Which TVs in the market are LCD TVs? CANTV Super TV C49S, Cool Open K50J, Hisense LED55EC760UC and other products are good choices, users who want to buy LCD TVs can pay attention, we will recommend more value products for you, help you choose the LCD worth buying TV.
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