Big Screen Lab

INFORMATION ZONE: BUYERS GUIDE

SIZE OF THE TV

What should be the size of your new Television for your room? 

The size of the Television matters a lot. In many situations, the size is considered as social status, but many want to buy large size TV to fulfill their dreams. Many of them don’t know what should be the right size TV for their lounge.

Selecting a TV size depends on a few things –

  • The budget for your TV.
  • Size of the room where the TV is going to set.
  • What type of TV you are going for means is it QLED or OLED

In our opinion budget is the vital factor to buy a new TV but when we talking about size budget doesn’t play that vital role because let’s say that you have no budget constraints you can afford any size TV, but you may not have space in your room to accommodate a large size TV. However, we appreciate that buying the biggest TV possible but isn’t always an option.

Second where you going to place your new TV? Means the size of the room if you have a small room and you get a big size TV then your viewing experience will be bad, the same thing happens for large room small TV.

And third, what type of TV you are going to buy is it QLED or OLED or what? Because type besides the Resolution of TV or we can say pixels density.

Angular Resolution is the number of pixels per angle. The more the distance from the TV, the more clarity, more detail and you will get a better image. The more distance the more will be the Angular Resolution. The close you are lower the pixels density.

Screen Size               Distance           Distance
                                     (1080p)                 (4k)

25″                            3.2′(0.98 m)    1.5′(0.46 m)
30″                            3.8′(1.16 m)    1.7′(0.52 m)
35″                            4.4′(1.35 m)     2′ (0.61 m)
40″                            5.1′(1.56 m)     2.3′(0.71 m)
45″                            5.7′(1.74 m)     2.6′(0.8 m)
50″                            6.3′(1.93 m)     2.9′(0.89 m)
55″                            7′ (2.14 m)       3.2′(0.98 m)
60″                           7.6′(2.32 m)     3.8′(1.16 m)
65″                           8.2′(2.5 m)       4.1′(1.25 m)
70″                           8.9′(2.72 m)     4.4′(1.35 m)

The above table and charts show what should be the right distance by size and resolution of a Television. One thing matters that’s your seating distance from the TV. We explain you a simplified calculation that you can do your own to get ideal screen size, measure the distance between your seat and TV, let’s take it 5ft means 60 inches now divide it by 2.5, what you get 24 that’s the exact screen size for your new TV.

CONCLUSION

In our opinion while selecting a TV size, first set your budget, second decide which TV type (which resolution) then mainly calculate out the right screen size by above formula by taking your seating and Television distance or you can take your room length, whatever you just have to take a required distance as you want, then divide it with 2.5 and it will give you the actual size. If the right size is out of your budget then go for the maximum size under your budget.


RESOLUTION

What is Resolution? 

Resolution is the number of dots, or particles, or pixels that an image has and an electronic display can show. The pixels essentially produce specific colors, the more pixels on a TV the more detailed picture on the screen.

  • 480p is known as STANDARD having columns width in pixels 720 and lines height in pixels 480.
  • 720p is known as HD, HD READY having columns width in pixels 1280 and lines height in pixels 720
  • 1080p is known as FULL HD, FHD having columns width in pixels 1920 and lines height in pixels 1080.
  • 4K 2160p is known as ULTRA HD, UHD having columns width in pixels 3840 and lines height in pixels 2160.

Resolution is the primary specification used to sell a TV after the TV size. High Resolution doesn’t always mean that the TV is better, a Television with a better contrast ratio, better color, better HDR Performance will display much better than the TV just having more pixels.

Only upgrading your TV to high resolution is not going to make any difference because to experience high-density picture you also need high-resolution content. We have listed content according to their resolution

  • STANDARD CHANNEL – RESOLUTION 480i
  • HD CHANNEL             – RESOLUTION 720p or 1080i
  • NETFLIX or AMAZON PRIME – RESOLUTION UPTO 4K
  • BLU-RAY                          – 1080i or 4K          

CONCLUSION 

The TV resolution is a big factor that defines its picture quality, but only high resolution cannot express itself until you provide him with high-resolution content. So, when you go for High-resolution Television must keep in mind that you should provide high-resolution content to your TV and also maintain the viewing distance.

Refresh Rate

Did you ever tried to know that in some Television fast-moving objects appear to blur, dusty they are not so clear to your eyes, but in many modern TVs they are clear as WOW. Among many reasons, one of the most crucial reason is the TV Refresh rate.

Refresh rate explains the rate or speed at which images are uploaded one by one within a second of the time. By which TV screen is able to display a series of images at a very high rate. Which creates a fast motion effect or a moving effect on our visual.

If a TV has a low Refresh rate then it means that a moving image will appear blur and it will lag on the screen. But the TV with a high Refresh rate will display a moving image fast, smooth and clear.

The refresh rate is explained in Hertz. Then if we say that a TV has a 60 Hertz Refresh rate what does it means? It means that the TV can play 60 frames per second. Hertz refers to the number of times the pixels used to display an image are refreshed.

Different TV manufacturing companies uses different parameters:

  • LG : TruMotion: TruMotion 240 = Refresh rate 120 Hz, TruMotion 120 = Native 60 Hz
  • Samsung : MotionRate: MotionRate of 240 = Native Refresh Rate 120 Hz and MotionRate of 60 = Native 60 Hz Refresh rate
  • Sony : MotionflowXR : MotionflowXR 240 = Native 60 Hertz, MotionflowXR 1440 = Native 120 Hertz
  • VIZO : Effective refresh rate : Vizo Effective refresh rate is just double the Native refresh rate. That means Native 60 Hertz is 120 Hertz Effective refresh rate.
  • TCL: Clear motion index: TCL all models are actually 60 Hertz Native refresh rate the only exception is TCLs most expensive model.

CONCLUSION 

The TV manufacturer tried to present existing technology in new ways. If you buy a TV to see a high motion picture or games then go for a High Refresh Rate of 90 to 120 Hertz and if you want a TV to see only native programs then go for 50 to 60 Hertz Refresh Rate. 

But make sure to check refresh rate before buying a Television and beware of Fake Refresh Rate


DISPLAY PANEL

There are different types of display panel LCD-LED-QLED-OLED. The main factors which categories premium and non-premium TV is its Display Panel.

LCD is the Liquid Crystal Display, despite different names LED TV is just another type of LCD TV. The big difference between LCD and LED is that LCD TV uses Cold Cathode Fluorescent Lamps ( CCFLs) for backlighting, on the other hand, LED uses Array of Light – Emitting Diode to illuminate the screen.

QLED and OLED 

QLED TV uses Quantum Dot LEDs which increases efficiency and brightness. Quantum Dots are nano-sized semiconductors that convert backlight to emits there own differently colored light which improves display brightness and colored gamut by reducing light loss. 

QLED doesn’t have the ability to radiate light themselves. Quantum Dots don’t directly emit color, they spread on a piece of film that acts as a color filter. These displays are similar to Active Matrix Organic Light Emitting Diode ( AMOLED ). They have good light-emitting and absorbing capacity which results in colorful pictures and energy-efficient.

OLED                

OLED stands for Organic Light Emitting Diode, OLED TV offers amazing deep-contrast ratio and per-pixel accuracy than any other display. OLED TVs are amazingly thin, but you have to spend a good amount of money to get them because they are only available in high-end TVs. 

In OLED TV each pixel glows as the voltage pass through a giant complex molecule called ‘YEP‘ an organic light-emitting diode. The emitting color depends on the molecule and brightness depends on the voltage applied.

CONCLUSION

QLED TVs are far better than ordinary LED TVs, actually, QLED TVs are up-gradation of LED TVs.

But OLED TVs produce deep, dark blacks which are a more important factor for excellent picture quality. Deeper blacks enable higher contrast and richer color.

Secondly, the response time of OLED TV is far better than QLED TV. Time taken by each diode from ” on ” to ” off ” is referred to as response time.

So, overall the OLED TVs are the winner but they are costly.   In our opinion traditional LED TVs ( without OLED ) are also premium TVs, you can go for that.


SCREEN PANELS

In this section, we are going to discuss mainly two crucial screen panels IPS and VA panels.

What are IPS and VA panels?

IPS stands for In-Plane Switching Panel and VA stands for Vertical Alignment panel. When we see LED TV from different angles we find color change on the display, this is because of Screen Panels.

The IPS panel is a screen technology designed to solve the main limitations of TN ( Twisted Panel ). Basically, two important limitations which include strong viewing angle dependence and second is low-quality color reproduction

IPS panels are good for a wide living room, who watches the TV with an angle while sitting or standing. That means they have a wide viewing angle. But IPS panels have few CONS – IPS panels have slower response time, higher production cost, higher power consumption, and lower refresh rate. 

VA panels were created to mix the advantage of IPS and TN panels. VA panels have a high refresh rate, better contrast ratio, better color reproduction, maximum brightness. If we talk about CONS – VA panels have not that viewing angle like IPS panel, they are not good for gaming because of blurring in fast-moving objects.

CONCLUSION

If you have a wide room or you want a wide viewing angle then no doubt IPS panels are good to go with. If you want a television that works great in dark then the VA panel is good.


RMS OUTPUT ( SOUND )

Today sound quality is a very important aspect of TVs. If you have good picture quality but poor sound quality then you will not get the joy of watching any program in your dreamed Television.

RMS stands for Root Mean Square Output it is used to define the average power output of the speakers over a period of time. RMS is a mathematical equation that measures a speaker’s accurate power output. RMS value is described in watts on product packaging. 

Watts is converted into RMS by simply multiplying watt by 0.707. If you have a speaker of 5W then RMS value will 5 x 0.707 equal to 3.535 RMS. However, it is wrong to say that a TV with a good RMS rating will sound good than a TV having a low RMS rating.

RMS rating used to describe volume loudness it is also mandatory to have additional features to get better sound quality like Clear audio + features which makes the audio clear to hear. In today’s TVs comes with inbuilt speakers or soundbars system with DTS ( Digital Theater System ) or Dolby Digital like Harman Kardon is a good inbuilt speaker which comes with many TVs.

In our opinion, it is also good to go with the Dolby Digital sound system because it provides full five bandwidth channels front left, front right, center, surrounds left and surrounds right for the surround sound quality. Dolby Digital compress 5:1 channel digital audio data down to a raw bit rate of 640 kilo-bits per second (kbps). For DVD video and audio maximum bit rates Dolby digital gives is up to 448 K bits/s.

On the other hand, DTS surround sound compress about 4:1 but applies up to 1.5 megabits per second but bit rate is limited to 768 Kbps on DVD video.

CONCLUSION

It is difficult to decide which format is superior as there are many factors to consider except bit rates and compression levels. But accordingly, to us Dolby Digital and DTS are nearly the same both deliver surround sound. And are an audio lover and want something awesome then you can go for DTS:X or DOLBY ATMOS.


SMART TV

What is Smart TV? 

Many of us mix Smart TV with Internet TV but Smart TV is not an Internet TV because Internet TV receives Television content over the Internet, not by the traditional system. Smart TV is more likely a Smart Phone. In Smart Phones, OS is uploaded but in Smart TV many TVs come with pre-loaded OS or it is available through the set top box.

A Non-Smart TV can be converted into Smart TV with HDMI port ( Obviously if your Non-Smart TV has that option available ) by using Google Chromecast, Amazon Fire Stick and many more.

Today Smart TV comes with the integrated operating system, it can be Android OS or it can be LG Web OS, Samsung Smart Hub but in all this Android OS is popular.

In Smart TV their traditional functions are provided through broadcasting media other than that they also provide Internet browsing, On-demand media streaming, home networking access, you can also use apps as you do in SmartPhone they may be pre-loaded or you can download it from app stores like google play or any other marketplace , you can also play games by connecting gaming consoles.

Different TV manufacturer has its own OS. Like LG has Web OS which is Linux based Smart TV operating system which you can use through a graphical interface ( GUI ). It is very stable, fast, user-friendly.

Samsung Smart hub OS on Samsung Smart TVs which allows you to explore Samsung apps, search movies, TV show, browse the web and many more.

CONCLUSION  

The smart TV takes you to another world makes your idiot box a multitasking box. On the other hand, Smart TV comes with a high price not everyone can afford it, whereas non-smart TVs don’t have these cool features but they come at an affordable price. 


HDR

Nowadays in when we talk about TV it naturally comes the term HDR. We all talk about HDR but…

WHAT IS HDR?

HIGH DYNAMIC RANGE 

“OK” WHAT IS DYNAMIC RANGE?

This is the question where many fail to explain. Dynamic Range in simple words ” it is the ability of a camera to capture the lightest and darkest area of the image without losing its detail.”

Now HDR in TV means greater Dynamic Range, greater detailed image, more visible difference between the brightest and darkest part of an image. That means your eyes can view white as super bright for the brighter parts and black as very dark for darker parts. HDR TV presents color more lifelike, it simply does that by using panels that offer Wide Color Gamut.

NOTE – Don’t mix HDR with HD, FHD, UHD. These are separate things basically HD, FHD, UHD are all about pixel density, more pixel density more detailed image. On the other side, HDR is about creating Dynamic pixels to present a realistic, more lifelike visual. Doing more with these pixels.

One more thing is that you cannot enjoy HDR with only HDR-capable TV you must need HDR content for it to display. HDR content ( HDR video ) is nothing but metadata. HDR metadata is a data a piece of additional information that comes with the video signal that HDR-compatible TV read and then display.

There are different types of HDR formats :

  1. HDR10: HDR10 is a static metadata processing, a piece of static information to the video stream on color calibration settings needed to make the picture real. HDR10 has the output of about 1000 nits ( Nits used to measure brightness ) of peak brightness. It is the most compatible and supported format. It supports 10 bits display means it can display 1 billion colors.                                                                                                                            
  2. HDR10+:  HDR10+ is an expanded version on HDR10 format it is created by Samsung. HDR10+ is a Dynamic metadata processing that continuously pulls the display settings to get the most and best color possible. HDR10+ supports up to 4000 nits of peak brightness, but it has a 10-bit display as HDR10.                                  
  3. DOLBY VISION: Dolby Vision is another HDR format and one of the best developed by Dolby Laboratories. Most 4K TV and OLED TV supports this format. It delivers 12-bit color depth( 68 billion colors ) and supports the backlight system four times more powerful than standard HDR TV.                                                                                                                                                                                                              One of the interesting things is that Dolby Vision content mastered for 10,000 nits, but right now no display can support this, so Dolby content is mastered around 4000 nits of peak brightness.
  4. HLG: Hybrid Log Gamma created by Britain’s BBC and Japan’s NHK. Dolby Vision and HDR10 aren’t suitable for Broadcast Signals and they also have compatibility problems with older TV and modern TV. So HLG is created to solve this problem. HLG uses STANDARD DYNAMIC RANGE ( SDR ) signal instead of HDR signal and adds extra information for HDR rendering, basically HLG males images brighter and more vivid but blacks remain the same as SDR image.

CONCLUSION

HDR10 is good and affordable and it can be used as an alternative for those who cannot afford Dolby Vision compatible TVs.


WCG

Wide Color Gamut and HDR are found together but they are not permanently linked. HDR increases dynamic range and WCG increases color impact, both create a difference on screen. First, know something about Color Gamut.

Color Gamut is a range of colors found in the visible spectrum, Color Gamut is actually is a color space. When certain colors cannot be expressed with a particular color model, those colors are said to be out of gamut. Color Space is a standard that defines a specific color range that a given technology can display.

Color Gamut in a TV is a section of colors that a Television can produce to display. If a TV is able to display all the colors included in that color space then it full fills the Color Gamut specification.

R G B – Red, Green, Blue are primary colors of this color space, others are a combination of these three colors or shades of these three colors. It is created and maintained by CIE ( International Commission of Illumination ) they set the parameters that what a TV can do with these colors.

whereas WCG ( Wide Color Gamut ) is an extended version of Color Gamut. Wide Color Gamut allows the TV with a wide range of colors to display, the colors are deeper and richer. Wide Color Gamut provides a large color palette of colors to a device to work with. It creates more realistic colors that a human eye can see. 

It increases “bit depth” means color information stored in a TV for each color, the higher the bit depth more colors it can store.

WCG has many shades of individual color, 10-bit panel which is capable of 10-bit color depth nearly 1.07 billion color palette and is capable of producing 1024 shades of one individual color. But ordinary HD TV has an 8-bit panel ( 16.7 million colors ) 256 shades of individual colors.   

CONCLUSION

Wide Color Gamut is very necessary to get real-life experience from the content on TV. But this is only useful in HDR content and it prefers 4K resolution. If you can afford then you must buy it.


PICTURE ENGINE

An intelligent image or video processor is known as a picture engine. It takes a video or image from any source whether it is a movie, Blu-Ray disc, DVDs whatever and then it upscales it to improve the picture when it displayed on a Television its capable of producing higher resolution images. 

A picture engine does this by analyzing and refining every pixel of the image compare it to an internal database. After that, it starts rebuilding of image or video by taking pixels and image details that were last when moving from a lower resolution to higher.

There are different types of picture engine :

  1. Triple XD Engine: Triple XD engine is a technology by LG that enhances picture quality. It provides three selected enhancements – i) Contrast which increased black levels and brightness.                                                                                              ii) Color-enhanced and alter the color tone.                                                                                                                   iii) Noise reduction which provided Analog and MPEG noise reduction.                          
  2. X-Reality Pro: This picture engine is developed by Sony, it restores images when they are displayed on a high-resolution screen. It process and scales up every pixel effectively which ensures a crisp and clear picture. They give the picture more color, more texture and more buoyancy.                                                                                          
  3. HyperReal Engine: Sony, LG now its time for Samsung. This engine governs the contrast, color, and motion to its peak level. HyperReal Engine creates the picture which is unbelievable and nonparallel.                                                               
  4. 4K Fine Remaster Engine: This engine is from Panasonic, the main purpose of creating this engine to give actual 4k tv experience to potential customers. When someone watching content on a 4K TV but that content is not actually a 4K content then it calls for an upscaling of the content. So that it can be watchable on a 4K TV.                                                                                                                                                        Now the aim of the engine is a successful scaling up of content by resolving the issue like grainy output that can look blurred.     

                                                                                          CONCLUSION    

Nearly all Modern Television comes with these picture engine and some come costlier, only be sure to check the package before buying.                                                                                                    

 

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