Buying a TV? Here Are 11 Things You Should Know

 
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Buying a TV? Here Are 11 Things You Should Know

10/07/2018 20:27:15

Smart TV. LED. OLED. 4K. HDR. The world of TVs is looking better every day, but also more confusing. Today, there's a ridiculously wide array of high-definition (HD) and 4K Ultra HD sets in stores, from bargain big screens to high-end displays that can cost as much as a car.

We’re here to help you decide

 

Quick Tips
If you’re in a hurry, here are the most important things to consider before you buy a television. We explain each of these points in greater detail in the text below:

  • Don’t buy a TV with less than 4K resolution (i.e., avoid 1080p sets) if you want a future-proof set.
  • Expect to pay about $500 for a solid 50- to 55-inch bargain 4K TV and at least $900 for a 65-inch model.
  • Don't buy a TV with less than a 120 Hz refresh rate.
  • Look for an HDR-compatible set, which offers more realistic colors and better contrast.
  • OLED TVs look much better than a typical LED LCD, but they are considerably more expensive.
  • Ignore contrast-ratio specs: manufacturers fudge the numbers. Trust your own eyes.
  • Look for at least four HDMI ports; 4K shoppers should ask about HDCP compatibility.
  • Curved TVs are a fashion statement. They don’t benefit image quality.
  • Most TVs are “smart TVs” these days with easy access to Netflix and other online apps. Don’t be tricked into thinking this is a big deal.
  • Plan to buy a soundbar. TV speakers are worse nowadays because the screens are thinner.
  • Avoid extended warranties. Your credit card company may already provide purchase protection.

Screen Size: Finding the Sweet Spot
Whether you're looking for a basic or high-performance TV, the biggest factor in your decision will probably be screen size. Consider how many people in your family typically watch at once and where you're going to put your new set. Then pick the largest screen size that will fit comfortably into that space — and your budget. The sweet spot today, considering price, performance and the typical living room, is between 55 and 65 inches.

Screen size also depends on how close you sit to the TV. Basically, if you can see the individual pixels of the screen, you're too close. A good rule of thumb is that you should sit at a distance from the TV that is three times more than the height of the screen for HD and just 1.5 times the screen height for 4K Ultra HD. In other words, you can sit twice as close to a 4K UHD TV.

Here's a more in-depth guide to calculating the proper TV screen size based on the dimensions of your room, as well as the resolution of the TV. 

If you have the opportunity, go to a store (and maybe bring your family) and look at the TVs. Even though 4K content is still rare, you may want that higher-resolution technology if you plan to sit close to a very large screen.

Bottom Line: Choose a screen size and resolution appropriate for the distance you will sit from the screen. We’d start at 55 inches.

 

Screen Resolution: 4K or HD?
Resolution describes the sharpness of the TV picture, usually in terms of horizontal lines of pixels. They’re very rare at this point and should be avoided, but a bargain HD set may support only 720p, which means the set displays 720 lines scanned progressively (or in a single pass). Other HDTVs support the 1080p HD format, also called full HD, which has 1,080 lines of resolution. But at this stage, we’d skip 1080p sets, too.

That’s because TV manufacturers are rapidly shifting  from HDTVs to Ultra HD sets (also called 4K). These 4K models have four times the number of pixels as current HDTV screens. We’re talking 2,160 horizontal lines, or 3840 x 2160 pixels. The biggest benefit of 4K TVs is that small objects on the screen have more detail, including sharper text. Overall, images appear richer and more life-like than on an HDTV, but the benefits can be subtle.

Ultra HD video looks great, and it's getting easier to find. Several streaming services, like Netflix, Amazon Video and even YouTube have started offering 4K content, and ultra HD Blu-ray discs are becoming more common. Live TV hasn't fully embraced 4K yet, but DirectTV, Dish Network and Comcast Xfinity have all started offering 4K movies. Although Ultra HD sets can upscale existing HD content, the results can be mixed and do not look as sharp as original 4K programming.

With those provisos, ultra-HD TV models are supplanting conventional HDTVs. Vizio, for example, has only one HDTV line left.

Bottom Line: Full HD 1080p is still the most common screen resolution today, but 4K is increasingly becoming the standard, and it's a better choice if you want to future-proof your investment.

 

HDR: Get It If You Want the Most Colors
HDR is a new feature of 4K Ultra HD sets and it stands for high dynamic range, a reference to its ability to deliver more colors, more contrast levels and increased brightness. HDR is essentially an upgrade of the 4K, or Ultra HD, format (it is not applicable to 1080p HD sets). For this new feature, TV makers are christening new monikers for the sets to distinguish them from standard 4K Ultra HD TVs.

The basic standard for high-dynamic range content is called HDR10, as set forth by the UHD Alliance, an industry trade group. Dozens of companies are supporting this basic minimum specification for HDR compatibility, so you will see "HDR10" or "Ultra HD Premium" on a growing number of sets this year.

Dolby Vision is a more demanding version of HDR, created and licensed by the folks that brought us Dolby noise reduction and surround sound. In theory, a Dolby Vision set has to meet a stricter set of criteria to display HDR content, and our testing seems to bear this out. So far, Dolby Vision has led the industry in terms of proprietary HDR formats.

There continues to be some HDR confusion. Virtually every HDR-enabled set is currently Ultra HD Premium- or HDR10-compatible, while others are Dolby-Vision-compatible (like Vizio and Sony) and some are compatible with both standards (like LG). Samsung has introduced it's own premium HDR format, called HDR10 Plus, and Technicolor has brought its own standard to the market, called Technicolor Advanced HDR, which is expected to compete with Dolby Vision in the premium HDR space.

There’s not much HDR programming available, but it’s starting to look a bit better. There are a few dozen movies in the new 4K Blu-ray disc format,  with a growing number of HDR shows available via streaming services, like Amazon Prime and Netflix. Some new 4K Blu-ray players also promise to be upgradable to handle the new HDR discs, but check before you buy. Finally, cable and satellite are getting their own form of HDR, called Hybrid-Log Gamma (HLG), so you should start seeing HDR pop up now and then for movies and even live TV.

Bottom Line: Don't choose a set just for its HDR support because the standard has not yet been settled. However, if you want the best, buy an HDR set that is compatible with Dolby Vision, as that format seems to be gaining momentum.

 

Refresh Rate: Faster Is Better
The refresh rate, expressed in Hertz (Hz) describes how many times per second a picture is refreshed on the screen. The standard refresh rate is 60 times per second, or 60 Hz. However, in scenes with rapidly moving objects, a 60 Hz refresh rate can make things look blurry or jittery, particularly on LCD HDTVs. So, to create a more solid picture, manufacturers doubled the refresh rate to 120 Hz (and in some cases up to 240 Hz).

Since there aren't that many per-second images in original video content, TVs handle the faster refresh rates in different ways. One method is to simply insert black images between the original pictures, tricking the viewer's eyes into seeing a less blurry, more solid picture. Another technique is to generate and insert new images — showing a state of movement in between the two adjacent pictures — to display more realistic-looking motion. However, depending on how the video-processing is done, it can make a movie or sitcom look flat, or as if it were a poorly lit, old-time soap opera.

Some new models are boasting High-Frame Rate (HFR) support, which means that they have both a higher refresh rate and added support for content with higher than 60 Hz frame rates. With HFR content set to come from both movies and live broadcats -- HFR will be especially good for live sports -- it's a feature to watch for in 2018.

A word of caution: beware of terms like "effective refresh rate," which means the actual frame rate is half  the stated rate (e.g., a "120 Hz effective refresh rate" is actually a 60 Hz refresh rate).

Bottom line: Don't buy a TV with less than a 120 Hz refresh rate.

 

HDMI and Connections: Go for More
It may seem like an afterthought, but pay attention to the number of HDMI inputs a set has. Manufacturers looking to shave costs may offer fewer HDMI plugs on the back. These ports can get used up quickly: Add a sound bar, a Roku or Chromecast and a game console, and you've used three ports already.

If you have decided to take the plunge and get a 4K Ultra HD, make sure the set's ports support HDMI 2.0 to accommodate future Ultra HD sources. Many TVs on the market have only one port that supports the 4K copy-protection scheme known as HDCP 2.2 (high-bandwidth digital content protection).

Bottom Line: Look for at least four HDMI ports; 4K shoppers should ask about HDCP- compatibility.

 

TV Types and Jargon Explained: LCD, LED LCD, OLED
Aside from projection sets, there are basically only two types of TVs on the market: LCD and OLED. Unless you have a lot of disposable income, you'll probably be buying an LCD TV.

LED and LCD Sets
The lion's share of televisions today are LED LCD. These HD and Ultra HD sets use light-emitting diodes (LEDs) to illuminate the LCD screen and can be extremely thin. Many of these TVs can dynamically light up specific portions of the screen and dim other parts to better represent a mix of light and dark areas in a scene — a feature known as active dimming or local dimming. No-frills LED LCD sets can be had for as little as $200 for a 32-inch screen, while a top-of-the-line 90-inch model can go for $8,000.

Most LCD sets use LEDs on the edge of the screen. The better of these models support active dimming, but it takes some digital sorcery to do this by merely manipulating lights along the edge.

Full-array LED sets have light-emitting diodes directly behind the screen, in a grid of "zones" that can be lit up or darkened individually. Such an arrangement makes the backlight more precise and allows a more-detailed picture regarding contrast. Full-array backlighting was once reserved for top-tier models, but with more Ultra HD sets appearing at lower prices, this feature is becoming more common on modestly priced sets.

Another LCD technology, called quantum dots, is becoming more common, spurred on by the requirements of HDR to produce a wider array of colors and more brightness. An LCD that uses quantum dots basically has another layer, or added “rail,” of different size nanocrystal dots that light up when the LED backlight hits them. The result is a wider color spectrum and increased brightness.

Be aware that some brands offer confusing labels. Samsung's newest sets are dubbed “QLED.” These are quantum-dot LCD TVs — not to be mistaken for OLED. And while quantum dot displays still can't match OLED in terms of sharpness and true black levels, the gap is narrowing as manufacturers work to improve the technology.

Pros: Wide array of prices, sizes and features; Some affordable Ultra HD 4K models; Bright screens visible even in a sunny room; Image quality steadily improving with full-array backlighting and quantum-dot technology.

Cons: Exhibits imperfections when displaying rapid motion, as in sports; Loses some shadow detail because pixels can't go completely black (even with full-array backlighting); Images fade when viewing from the side (off-axis).

OLED TVs
OLED TVs go one better than full-array LED-LCDs with a few dozen lighting zones. In place of a backlight, OLEDs use a layer of organic LEDs, controlled at the pixel level, to achieve absolute black and stunning levels of contrast. (Footage of fireworks against a black sky is a favorite demonstration of OLED technology.)

LG isn't the only company actively pursuing OLED technology in large screen sizes, with new OLED models arriving from Panasonic, Philips and Sony this year. Most new models have Ultra HD 4K resolution, but a few, cheaper HD OLED models are still around. 

Pros: Best TV picture, bar none; Colors truly pop, deeper blacks and better contrast and shadow detail than LCD TVs achieve; Retains image quality when viewed from the side.

Cons: Stratospheric prices; lower peak brightness than some LCD sets, uncertainty about how screens will fare over time, including whether they will retain "ghost" images (also known as burn-in) from displaying a static picture for too long.

 

Curved Screens: Not Needed
Another innovation intended to attract shoppers' attention is curved screens — mostly used for OLED TVs and 4K LCDs. The idea, say manufacturers, is to make the TV-watching experience more immersive.

However, not only do curved screens have no technical advantage over the other sets, but they actually have some distinct disadvantages. For one, the slightly curved aspect distorts the image and reduces the available side-viewing angles, thus limiting the best view to a few people sitting in a narrow, center sweet spot. LED models also are less likely to produce uniform brightness across the screen.

In addition, some testers, such as Consumer Reports, have reported viewer fatigue caused by the curvature. Conversely, other early owners have reported that after living with a curved screen, they don't notice the difference or detect any distortion.

Curved models are more expensive: A 4K, 65-inch curved LCD model, for example, costs about $200 more than a comparable flat model. Samsung and LG – the two major manufacturers to offer curved screen TVs – have all but abandoned the concept, offering only one or two curved models in 2018.

Bottom line: Curved TVs are primarily an extra-cost fashion statement, without delivering any appreciable benefit in image quality. Most companies are phasing them out.

 

Smart TVs: Most Already Are

An increasing number of sets come with built-in Wi-Fi for connecting Internet-based services like Netflix for streaming videos or to run apps for watching special-interest programs, downloading on-demand movies, playing games or even posting to Facebook. The latest models can even search for content across streaming services and live programming on cable and satellite.

The interfaces are generally getting better. Vizio, LG and now Samsung use a handy bar of icons at the bottom of the screen. Roku offers its famously intuitive interface in budget TVs from Hisense, Insignia (Best Buy's brand) and TCL. Google provides its Android TV platform to companies such as Sony and Westinghouse. While most smart TVs include the major services, such as Pandora, Hulu and Netflix, check to make sure the TV you buy has the options you want.

In the past, you could have bought a less expensive "dumb" TV and made it smart with a streaming device like the $50 Roku Streaming Stick. But nowadays, it's hard to get a TV that isn't smart, even if you're going for a small bargain model.

Bottom line: Smart capability is becoming a standard feature in TVs, so it's less and less of a factor in your buying decision.

 

To read more visit this link: https://www.tomsguide.com/us/tv-buying-guide,review-1943.html​

 

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