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LED Televisions



What is LED technology and the best TVs in this technology


Today the TV lamp practically do not lie, they were replaced by a new LED technology, characterized by bright colors, high-quality images, a little thickness of the device and a diagonal. These are liquid crystals, of which the “running” matrix of screens of smartphones, laptops, monitors and other devices. What is an LED TV, how it differs from its predecessors — this will be discussed in the article.
What is a LED TV for the first time LCD-matrix with so illuminated presented the Korean company Samsung LED (light-emitting diode)-light-emitting diode, with a semiconductor-like function. Electricity, passing through it, forms optical radiation. Modern LED TV is the same LCD device, which only has a matrix led backlight. For the first time the LCD matrix with such a backlight was presented by the Korean company Samsung. Before this, there were mobile LCD panels with CCFL fluorescent lamps as light sources. That diode backlighting is better compared to CCFL (LCD devices): TVs have become thinner; their power consumption has decreased; there are no harmful chemicals in their composition.
The first option is to “shine” only white diodes. Direct LED is red, green, blue, which is also called RGB. The shades of the diodes vary depending on the incoming color of the image. This allowed to improve the quality of the image and its resolution.
Led varieties
LED backlights are different, so there are two main types of LED TV screens: white LED( white LED). Simple technology, but better than the same fluorescent lamps. TVs with this screen consume little electricity, in addition, in the diodes there is no mercury content. In terms of color reproduction and depth of coverage, LED TVs with white LED backlighting are comparable to LCD devices; RGB (blue, green, red diodes). Technology with an advanced color palette that improves color quality. Since in these TVs a powerful GPU is installed, its price is higher. For image quality you need to pay and higher power consumption. Another technology is QLED. Mainly blue diodes are used, Film-coated with quantum dots (green and red). The technology improves the clarity of optical wave radiation. Compared to RGB, it is considered more economical in terms of electricity consumption.
The body became even thinner, the weight of the device decreased, viewing angles increased, color reproduction increased. But innovation costs money. Ways to place the backlight: LED edge. The backlight is located at the edges of the screen. There are options for laying along the perimeter or along one edge (more often from below). The final image depends on the characteristics of the specific screen. Such lighting has a number of disadvantages, so the technology is still cheap. The picture is not sufficiently contrasted, in addition, the sides of the screen are visible visible lights, in which the color reproduction “lame”. The advantage of the LED edge is the thickness of the body (a few millimeters); direct LED. The LEDs are located behind The Matrix, throughout the TV area. This increases the thickness of the device. But the possibility of adjusting the darkening of Black opens, that is, the image turns out to be in contrast. The price of TVs with such lighting is higher. Pros and cons
box thickness. With the advent of LED backlighting, ultra-thin devices began to produce. The old TV was on a special bedside table, and the new one is easy to hang on the wall with a stand; contrast and clear picture. LED models successfully compete with other TVs, as they reproduce a beautiful and juicy picture with the ability to adjust the contrast. For example, moving objects on the LCD seemed unnatural. With LED technology, this problem has remained in the past; energy efficiency. This fit is essential for many buyers. Compared to their predecessors, new TVs consume 40% less electricity; design, functionality. Manufacturers produce not only TVs, but whole works of art that easily decorate any interior. Now there are models of different colors, diagonals, shapes – for every taste; the life of LED TVs. Dot matrix LEDs maintain their performance for a long time without burning out.
Choosing the right model
How to choose a LED TV for home, what parameters to take into account: screen size. When choosing often look at the physical dimensions-what kind of diagonal of the screen. The unit is inches (1 ” = 2.54 cm). This is the distance between two opposite corners of the screen. When choosing the size, consider where the TV will be located. Devices from 32 to 42 inches are located at a distance of 2.5-3 meters; screen resolution. This is the number of points (pixels) from which the image is “collected”. Their number depends on the detail of the picture. For LED technology, a good choice is FullHD (1920 x 1080 dots), which is also called 1080p; scan frequency. This option determines how often frames on the screen are updated. The unit of measurement is Hertz (1 Hz = 1/100 of a second). To the picture is not slowed down and not lubricated, especially in dynamic scenes, “herzovka” should be 100 Hz; screen coverage. There are matte and glossy screens. You should choose from the room where the TV will be placed. The gloss is bright and contrasting. But it is “reflected”, so on a sunny day, reflections will be visible on the screen. Matte-not “glare”, but with reduced clarity of the image; connectors. Here they focus on the devices that will be connected to the TV. Mandatory connectors: HDMI (preferably more), USB; additional features. It is 3D and Smart TV. With the first, everything is clear: you can watch movies with a three-dimensional image. Smart TV-TV with Internet connection that connects directly or via a wi-Fi network. These characteristics are reflected in the final value of the model.


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