How to choose the right TV for the home without assistance
Hello world! As you know, information technology is not standing still, and go along all the time. The manufacturers of digital devices set the pace to the rapid development, and we breathlessly purchased their creations. Hard to say, the demand determines the offer or proposal determines demand the popularity of smart TVs is growing. In the race for the leadership manufacturers expand the functionality and improve technical characteristics. So in this post we will talk about how to choose the right TV for your home based on technical characteristics.
Undoubtedly leading manufacturers in the field of Smart TVs in the world market are such giants of the IT industry like Samsung, LG, Sony, Panasonic, Sharp and Philips. However, according to research by Strategy Analytics in the leading position in sales firmly entrenched, only the first two brands. Sony sales has fallen significantly behind its main competitor LG, but overall in recent years for the implementation of their models with smart features closer to the top of the bar.
at the same time, all these companies are big players in the markets in the CIS countries. I think consumers will undoubtedly be people who prefer one or another company, so focus on brands will not, and will get straight to the point. In a previous publication I have written about the selection of TV LED Smart TV, but it seemed to me that it is not enough, the technical aspects and this article will serve as a kind of logical addition.
Type matrix TVs and backlighting technology.
In a nutshell, about how to choose the TV for home or room not to tell, so the article will be lengthy. Be patient :).
LCD (liquid crystal TVs) — there are several types of illumination to form the image in the LCD. In them the image is achieved by passing polarized light from the source in the form of gels and liquid crystals. Proven these types of televisions for a long time and are still the most common. This technology has two types of backlighting, CCFL (lamp cold cathode) and LED (led lighting).
CCFL — this is the standard technique, where the backlight of the matrix provide a fluorescent lamp. From advantages it is possible to note only the uniformity of illumination, and the shortcomings of high power consumption and bulky as the TV are lamps and reflector. Since the design involves the placement of the CCFL lamps the whole width of the screen, it is difficult to control the contrast ratio, the result of which affects the image quality.
LED — this technology replaced the previous one and steadily pushed it out of the market. Low power consumption, small thickness, and the ability to control the lighting by zones did their job. Technologically led lamps are able to adjust the brightness around the TV screen, and only in the required areas. Such engineering approach has allowed us to increase the contrast, sharpen the image and reduce power consumption.
In turn LED backlight on the TV is divided into two main groups: Direct LED and Edge-LED.
Direct-LED (Full LED), — carpet type backlight where the LEDs are placed over the entire area of the matrix. In consequence, the thickness of the TV is slightly increased, but this approach allows to achieve uniformity of illumination and to be able to manage it in some parts of the screen. Therefore, the local control of the diodes allows you to dim the brightness in the desired region of the screen depending on the action. These TVs are evenly lit, with high contrast and brightness.
Edge-LED — the edge type backlight where the LEDs are located at the edges of the matrix, and the light from them falls on the reflector and scattered on the area of the screen. This technology makes it impossible to achieve a good contrast transition and full local dimming in black. The constant evolution of technology and various engineering solutions are gradually brought it to a decent level. These TVs have a thin thickness and have a relatively high brightness.
So you have an idea about these technologies, please watch the video in which Sony demonstrated the system's local Dynamic Edge LED backlight.
a Few words about what types of matrices are used in LED TVs. I am aware of these types:
- IPS — has natural color reproduction and high viewing angles. The matrix has a relatively high response rate (the smaller the better) and a moderate quality display of dynamic scenes. Static contrast ratio at 2000:1. Typically used in televisions low and medium level.
- PLS — is an alternative to the IPS. Has a higher pixel density, high brightness and good color reproduction, as it has a full coverage range sRGB (the standard representation of the color spectrum).
- S-PVA — this type of matrix is one of the best. Has a high viewing angles, good display of dynamic scenes, as well as a contrast ratio up to 5000:1. Usually installed in the televisions of the highest class.
- UV2А — the matrix is well-proven. The viewing angles are more than the predecessor, but less than IPS. Has a deep black color.
Active S-PVA matrix uses Samsung, LG, Sony and Philips, and a matrix UV2А set in the flagship model manufacturers Philips and Sharp. IPS is used by many manufacturers, usually in low-budget models. When buying a TV can't hurt to check it for dead pixels (for details see here).
Plasma Display Panel (plasma panel) — the images in these TV sets is formed by luminescence of the phosphor under the ultraviolet radiation. A pixel in this technology consists of cells, each of which contains a rarefied gas. Because plasma cells do not depend on light source, they do not need a backlight. Modern models have a thickness of about 3-4 cm. These TVs have high angle, low black level due to the high contrast, high level color gradations and less tiring on the eyes.
For plasma panels is not typical of the concept of response time as it is negligible. Simultaneously, there is a perception that the plasma panel in the power of technology (because of the residual image) have a low pair with a computer and a large power consumption. Experts say that modern, high-quality models can last for up to twenty years, well, the poor barely make it to three. Usually, famous brands keep the brand and the consumer does not allow. However, due to the technology they eventually start dimming effect (the colors are less bright).
If your choice falls on this type of TV, then pay your attention to the fact that the leading manufacturers of plasma panels remain Samsung, LG and Panasonic. Modern plasma TVs are able to adjust going from light to dark that allows you to display a clear image without false contours.
Have a built-in filter, which neutralizes the external light and transmits internal rays panel that gives you the opportunity to get a natural and rich colour reproduction even in bright light in the room. Despite the pros and cons of plasma, more popular are the LED and OLED televisions.
OLED (organic led) — perhaps this is one of the most impressive technologies. It create an even and slightly curved shape of the TV. At an optimal distance of this TV panel from your eyes, to each point on the surface of the screen the distance will be the same. This allows you to avoid the various distortions. The technology allows to make such TVs are much thinner and the picture is much brighter and more contrast. If you want to have an idea about these TVs, view a presentation from LG.
Here the image is formed by a self-illuminating diodes, which produce light under an electric current. Like plasma TV panels, they do not require backlighting. Contrast image at a high level, efficiency and low response time is very impressive. As we know, pixel has three subpixels (red, blue and green), but LG has stepped forward and added a fourth (white) that allows the TV to display a pure white color and reduce its power consumption. The price range is very high.
the diagonal of the TV screen.
Какую диагональ телевизора выбрать, решайте сами. Каких-то определенных правил не существует, но есть советы и рекомендации. Например, именитые бренды говорят, что оптимальное расстояние от глаз до экрана должно составлять три диагонали телевизора. Скорее всего here речь идет о просмотре изображения именно в формате 2D. Считаю, что для комфортного просмотра 3D эта дистанция велика. Лично я придерживаюсь такого мнения, что для максимального восприятия эффекта трехмерного изображения, желательно разместиться так, чтобы периферийное зрение тоже погружало вас в фильм.
Of course, you need to have a sense of proportion and not to bury your nose in the screen. A distance equal to about one and a half diagonals of the TV for viewing three-dimensional images would be sufficient. For example, 55 inch TV on the diagonal of 140 centimeters. Therefore the total distance will be just over two meters (2.1 meters). On the optimum distance is affected by not only the size of the screen, but the resolution matrix. High resolution TV for example, Ultra HD, placed the screen closer.
Some industry experts advise to choose a size for the house based on his next visit.
- Living room: from 46 inches and larger
- The bedroom and children: from 32-42 inches
- Kitchen: 26-32 inch
a Detailed table with the translation inches to centimeters on the diagonal, width and height will find the. All of these calculations and distances are provisional and are for guidance only. So the image always you happy,don't forget properly care for the TV screen.
Resolution and scan TV.
Is the screen resolution the number of dots (pixels) used to image detail. To be precise, this correlation points on the height and width of the screen. The higher the setting of the TV, the quality of the reproduced image better. However, you need to understand that resolution is not in itself, but from the original signal. Thus, if the signal is lower resolution than the matrix itself, the TV have to finish the missing pixels based on embedded algorithms (upscaling).
In consequence, quality suffers of detail. This is true for the broadcast with an analog signal (e.g., broadcast TV), digital broadcast has no such problem. Typically, the screen resolution depends on the type of TV and its diagonals. The smaller the diagonal, the lower the resolution. Here are some common types:
- HDReady — 1280 x 720 or 1366 x 768
- FullHD — 1920 x 1080
- UltraHD (4K) — 3840 x 2160 or 4096 x 2160
- UltraHD (8K) — 7680 x 4320
I draw your attention to the fact that the TV resolution is indicated by the number of rows. For example, 1080p, 1080i. Latin letters talking about the type of sweep: p (progressive)- progressive; i (interlinear) — interlaced. Progressive scan displays the frame on the screen at once, but sequentially interlaced odd and even lines. So progressive scan does not have such disadvantages as:
- the effect of a comb (comb) at the boundaries of fast-moving objects
- shake the picture frame in the presence of thin horizontal lines
Determining scan record is output the number of frames per unit time (second). Supports interlaced frame rate 25, 29.97 and 30 in a unit of time, and progressive in addition to these can support frame rates 50, 59.94, 60, and a common standard in the cinema at 24 frames per second.
the refresh rate of the TV.
Quite often, people confuse the refresh rate with the refresh rate of the screen (image) that represent advertising in stores, for example, sweep 200 Hz. Here you need to clarify. The fact that 60 fps is the maximum frequency even in a relatively new resolution standards. As you know the human eye perceive 50Hz, not as a flickering, but as a constant component. To achieve a smoother image in the dynamic scenes used the technology of the duplication of frames.
That is, the same footage to show the viewer several times. For example, in cinema standard is 24 different frames per second. To reduce flicker, each frame is displayed twice, which is 48 Hz. Thus the technology of duplication of the original frequency, for example, 50 frames per second gives the update screen at 100 Hz. That is, each frame was shown to the audience twice. If of those 50 frames each show four times, then the update frequency will be 200 Hz.
In fact, this technology is much more complicated. First, using a special algorithm analyzes two consecutive frames and generates additional (or more, depending on what the refresh rate), which is inserted between the two original. I tried to tell about the refresh rate of the TV in plain >
But for the smoothness dynamic scenes TV must have at least 100 Hz. This helps LCD TVs and plasma panels to get rid of the effects «torn» motion and blur in fast moving objects on the screen.
Однако, если телевизор планируется брать с возможностью воспроизведения трехмерного изображения (эффект 3D), то в силу этой технологии лучше отдать свое предпочтение телевизору с частотой обновления (развертки) не менее 400 Гц. Если желаете сэкономить, то для просмотра телевизора в режиме 2D вполне достаточно 100 Гц. Technologie не стоят на месте и сегодня модели телевизоров имеют частоту развертки 100, 200, 400, 800, 1000… Герц.
Instead of o or «unlucky notes».
In this part of the article will try to briefly describe the points to which too should pay attention when choosing the TV.
the Angle — modern TVs have claimed the angles 170 — 180 degrees. The viewing angle of your LCD TV (LED), in fact, may not correspond to the declared parameters of the manufacturer, which is not true of plasma panels. They usually this parameter does not exceed 170 degrees, but true. However, to evaluate this option works best visually and you should not rely on hard numbers.
a three-Dimensional image (3D) — modern televisions offer a three-dimensional image with active and passive technology and are equipped with two or four pairs of points. Recently the company Philips presented a TV where the 3D effect is achieved without the use of points, but not mass production, but what will be the price of such a device is already possible to imagine. Details about the technology of reproducing three-dimensional image in TV I already wrote and mentioned it here, so all the necessary information will get there.
I will only say that Samsung, Panasonic, Sharp, Sony promotes active (shutter) technology, LG has focused on the passive (polarization), and Philips embeds one and the other. Plus active 3D but the passive in cost and convenience to the eyes. Passive 3D glasses reduce image quality 1080p twice. This feature of the technology, where with a video resolution of 1080p on each eye «distributed» at 540p. Technology Active 3D provides Full HD picture quality with 1080p resolution for each eye. Decide in advance what 3D TV is best for you.
Communication (connectors) — it is very important that your TV had at least 2-3 HDMI (how to choose an HDMI cable see here) and multiple USB (here described selection fleshki). The fact that the HDMI interface can reliably transmit audio and video. It is widely used to connect the computer, console, and other devices.
Internet and multimedia — I have to say that the existence of Ethernet port on TV does not mean that it can be connected to the Internet. In some models, it is only used to connect it to a computer to transfer media content (movies, photos) via DLNA. What is it and how to connect through a home media server see here. As a rule, each manufacturer has its own software and you are free to use it. For example, Samsung has AllShare , and Samsung Link.
Digital TV. As a rule, all modern models have a built-in tuner, a slot for a CAM module and access card. The whole meaning behind the abbreviation in the technical description of a particular model. In a separate article you can get all required information the standards of digital TV broadcasting.
Many modern Smart TVs have built-in Wi-Fi module and an Ethernet port for communication with the Internet (pressure-tested LAN cable without the special tool). They have their own operating system. For example, Samsung is running Linux (spec. Assembly), LG recently uses WebOS, and Philips has TVs with Android (supports all standard applications). To these Philips TVs you can connect your digital devices on the Apple iOS.
The concept of Smart TV is quite wide, but usually such models have a full browser (with Flash Player) that enables you to watch movies, listen to music and use flash application online. It is very important that the Smart TV had a powerful processor, it will provide high-performance, high-speed multitasking, smooth when switching between different types of content and faster loading web pages. The greatest number of applications from major brands in their platforms include Samsung and LG.
If you want the TV to use apps from Google Play, I recommend to look in the direction Android consoles. Here is an overview of three popular SMART TV box (Beelink GT1, Sunvell T95U — PRO, YOKA KB2) that operate on an 8-core processor Amlogic S912. Each technology in TV its purpose. Plasma is ideal for viewing in the dark, where the image is revealed in a new way and LED (OLED) is equally well suited for different conditions and when working with a computer.
If you got something to add an article or want to Express your opinion — leave a comment. I wish you to make the right choice!