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For the longest time in history, the usual consumer market has been thinking of screens that are as flat as murals were just things of popular science fiction. However, when we entered the 21st century, the technology really showed that "wall painting" screens were possible with the development of LCD technology.
Today, LCD technology is what defines the traditional HDTV market today. It is actually the modern display technology that is in primary use, even though there are other types of digital display technology. In this article, we will discuss the basics of this technology and briefly discuss every first-class knowledge you may need to know about these types of HDTVs.
How LCD technology works
LCD stands for LCD screen. It is basically an electronic visual display technique that uses the light-modulating properties of the liquid crystals. Each pixel of an LCD screen is subject to the various electrical signals supplied by two transparent electrodes. When light passes through the modified liquid crystal display, it displays a specific image according to the electronic signal being fed to it.
While it can produce images by changing the light that passes or strikes it, it is incapable of producing light itself, which requires backlighting for the images to be viewed in the right detail. The most common backlight is fluorescent lamps, although the production of these types of LCD screens is limited due to the toxicity of mercury, an important ingredient in fluorescent lighting. The development of LCD backlighting is currently on the way to the use of LED lighting, which means that the screens become much thinner and more energy efficient while not having any direct danger to the environment.
Several developments have been made on LCD screens over the years. The most consideration would be the introduction of the IPS panel (in-plane switching) by Hitachi, which addressed the problems of low-quality color reproduction and very short viewing angles. Another example is the TFT technology (thin film transistor), which solves the issue of color and contrast problems in early LCD screens.
Advantages of LCD HDTV
Most of the benefits of LCD HDTV are centered on its overall efficiency and not its highest display performance. What it offers throughout the package, whether it is financial or technical, is what makes it an attractive purchase for some consumers, even though they are specifically spoken in several points:
- It is basically the cheapest type of HDTV you will ever find . As previously mentioned, LCD is standard display technology today. Even with the slightly more expensive LED backlit LCDs, you can still save a lot of money from buying, saying, an energy hungry plasma display.
- Has a higher built-in resolution due to having more pixels per unit area . This helps to a great extent if you want to maintain the sharp quality of images and video clips while watching them.
- Has a very low power consumption rate . LCD screens, in particular, are the LED backlit which are usually considered as the environmentally friendly HDTVs in terms of energy costs.
- Quite easier compared to other common HDTV types . The LCD technology does not need so much hardware, and again, the LED backlit is much. The only display technology that strikes it in this category is the new OLED display technology.
Disadvantages of LCD HDTV
Of course, like any other technique, LCD HDTV also suffers from a number of disadvantages, just like:
- It is not very effective to produce black and gray color . Well, they can, but other display techniques are much better than LCD. This is because the backlight still leaks out some degree of illumination at the dark parts.
- It has relatively limited viewing angles . LCD screens have improved a lot over the years when it comes to viewing angles. But they are still a little worse than other screen techniques, which can still provide clear images at a viewing angle of nearly 90 degrees from the front.
- The picture quality is good, but never good . This is another comparative disadvantage, and this time it is on its lower contrast compared to other screen technologies.