The History and Science of TVs

In the early days of television, TVs were prone to a phenomenon known as "burn-in." This was caused by the phosphors coating the back of the TV glass being burnt up by the cathode ray tube in the TV. The term "burned in" referred to this effect, which made it difficult for TV manufacturers to provide images that could last for an extended period without fading or becoming distorted.

The concept of burn-in was carried through to newer technologies such as plasma TVs and OLED (Organic Light-Emitting Diode) TVs. However, the explanation for burn-in has changed over time. In plasma TVs, the phosphorescent gas in the display cells could become worn out faster than surrounding areas, resulting in a "burned-in" effect. Similarly, in OLED TVs, organic compounds in certain parts of the screen can get worn out faster than surrounding areas, causing a similar burn-in effect.

In contrast to older TV technologies, modern LCD (Liquid Crystal Display) TVs do not suffer from burn-in. Instead, they are susceptible to other forms of degradation, such as vignetting and image fatigue. Vignetting refers to the darkening or lightening of images around the edges and corners of the screen, while image fatigue can cause the image to become dull and faded over time.

However, even LCD TVs can be damaged by prolonged use, particularly if they are subjected to intense viewing conditions such as continuous playback of bright colors. In these cases, the LCD cells and other components of the TV can wear out faster, leading to a decline in picture quality.

Regarding audio, Joe S asked whether it was safe to assume that the Vision Pro with AirPods Pro would not be able to provide the same level of sound as a proper speaker-based system. The answer is yes, earbuds and even headphones are not capable of producing the same level of bass or sound pressure as a subwoofer-driven system.

Subwoofers play a crucial role in producing deep bass notes that can create a sense of rumble and vibration in the chest. Earbuds and headphones rely on diaphragm movement to produce sound, which is much less effective at creating deep bass frequencies. Even high-end earbuds and headphones may struggle to produce adequate bass, particularly when compared to dedicated subwoofers.

One potential solution for improving audio quality from earbuds or headphones is the use of "bas shakers" – small transducers that can create a tactile sensation by shaking the air around the listener. However, even with these devices, it's unlikely to replicate the full impact of a proper speaker-based system.

In another question, Marcel asked how Caleb was doing and joked about his appearance. Meanwhile, Brand Hornick inquired about recommendations for splitting a signal from a satellite receiver to two OLED TVs. The recommended solution is to use an HDMI splitter with amplification capabilities, such as the Mono Price Blackbird 4K 1x2 amplifier. This device can be purchased online and is relatively affordable.

When using an amplified splitter, it's worth noting that even at shorter distances, signal dropout may become a problem if not enough power is provided by the splitter. In these cases, using an active fiber-optic HDMI cable may help mitigate this issue. For longer cables, such as 30ft or beyond, using a more robust and expensive solution may be necessary to maintain signal quality.

Finally, it's worth noting that TV manufacturers are continually working to improve their products and eliminate common issues like burn-in. As technology advances, we can expect even better picture quality, improved audio capabilities, and increased reliability from modern TVs.

"WEBVTTKind: captionsLanguage: enOn today's episode of You Asked can QLED and mini LED TVs get burn in how to solve  not getting HDR from the YouTube app on Apple TV 4K and speaking of  Apple TV 4K does it benefit from HDMI 2.1 and is using a computer monitor  instead of a smart TV a good way to avoid privacy issues all that and more comingup welcome back everyone I'm Caleb Denison and this is You Asked the show where I answer  questions that you asked in hopes that I can help you and others who have similar Tech questions if  you've got a question for me please send it to youasked@digitaltrends.com and we'll see if your  question gets picked to get answered on the show Tom Sampson writes is there any benefit to using  my Apple TV 4K in an HDMI 2.1 Port versus HDMI 2.0 no there is no benefit to using an HDMI 2.1  port for an apple TV 4K the only consumer Hardware that I'm aware of that benefits from the bandwidth  afforded by HDMI 2.1 ports are the Xbox series X the PlayStation 5 and a high-end PC pushing  4K 120 HZ video signals or 8K 60 HZ video signals Andrew Lopez wants to upgrade to surround sound in  his bedroom but his bed's headboard is against the wall and he's wondering if he can get decent Dolby  Atmos surround without surround speakers thanks for sending in the question Andrew so I also have  a bedroom in which the headboard is up against the opposite wall of the TV and folks I know a  lot of you out there question whether surround speakers will do anything good for you if say  your couch is up against the wall so here's my take on that while you will not get all of the  benefit of properly placed and spaced surround speakers relative to your listening position when  you're backs up against the wall you can still get some benefit from having surround speakers  on your bedside table uh you get a little bit of side fill and if you can place them even further  out to the side than say 4T from each head as one sits on the bed or couch you won't have to  turn them down quite as much to keep them from seeming like they're right next to your head  but even on a bedside table or nightstand I was able to dial down my surround speakers so they  enhanced the overall sound field without being a distraction I definitely prefer having them to  not having them again you're not getting the full intended or best surround or Atmos effect but you  are getting a little something and I prefer having it to not having it with that said you can often  save yourself some money by forgoing the surround speakers and instead getting a soundbar with up  firing drivers and side firing drivers which can provide some decent virtual surround and reflected  surround effects the Sonos Arc is a great example of such a soundbar but there are others out there  the key is in the numbers remember the the first number in let's say a 5.1.2 system as an example  the first number represents the main channels the second number represents the subwoofer channels  and the third number refers to the Atmos or height effect channels so what you want to look for is a  3.1.2, 5.1.2, 7.1.2 and even 9.1.2 look for those descriptions on a soundbar that does  not include surround speakers and that will be an indication that supports Atmos from the Soundbar  itself Dustin Stacy says they are not getting HDR from the YouTube app on their Apple TV and  asked if they should just use the YouTube app built into the TV instead Dustin there  is no reason you should not be getting HDR from the YouTube app on your Apple TV 4K if you are  100% sure the content that you're watching is an HDR and don't just trust the title of the video  because sometimes those lie then my best guess is that there is a setting a Miss in your Apple  TV I'm curious whether you're getting HDR from other streaming apps though I mean sounds like  you're just having a problem with YouTube anyway try going to settings then video and audio then  match content then choose match dynamic range make sure that's turned on so that the Apple TV 4K will  match its output to whatever the dynamic range of the content you're watching happens to be if you  still don't get get HDR from a video you know for sure is an HDR on YouTube then the problem resides  elsewhere but that is not a problem inherent to the Apple TV 4K Gary Eichelberger wrote in  wondering if using a computer monitor instead of a smart TV was a good idea if using a PC or an  external streaming device he wrapped up the email stating I frankly just don't really trust that  disabling the smart features really prevents data collection so Gary I did this for a while myself  I used a KTC OLED monitor we were testing with a Chromecast with Google TV connected to it and it  did work uh the issue with monitors is that they don't have picture processing built in now maybe  that's not an issue if you're using a PC where image processing is taken care of by whatever  GPU you have in that machine but streaming boxes and sticks don't have anything in the  way of picture processing they rely on a TV to do that job and you might find that not everything  you watch looks all that great because you have a monitor that isn't trying to clean up any noise or  other artifacts it's not upscaling unless you're using an Nvidia shield and most monitor speakers  are terrible if they even have them in the first place worse than crappy TV speakers even so you're  probably looking at having to get some kind of audio solution too but here's the thing there's  not any difference between using Android TV Google TV Roku Fire TV uh whether they're built into a TV  or into an external device same streaming OS same privacy concerns so maybe you get better  privacy using a PC if you've got it locked down really well but any other streaming box or stick  is going to come with the same privacy concerns as if that platform were built into the smart TV  itself the only exception is Samsung's Tizen and LG's web OS and that's only because they aren't  available in a streaming box or stick @darink24 has a Sonos Arc and Sonos sub with Sonos one  speakers as their surrounds and they wondered if upgrading the surrounds from the Sonos 1es to the  Sonos Era 300s would be worth it so I don't know if it would be worth it to you I can say  that I would absolutely make that upgrade and the reason why is that the Atmos effects and overall  Atmos enhancement that you would get from a pair of Era 300s is going to represent a significant  Improvement in your system sound at least I think it is a significant Improvement and this presumes  that you don't have those speakers in a bookshelf where upfiring drivers couldn't do their job but  yeah I would 100% do that upgrade when it was financially feasible to do so DJ Teknovibe  wants to know if you can get burn-in on QLED/Mini LED TVs so let's first recognize that LED, QLED,  mini LED these are all different types of LCD TVs they all have LCD panels in them now to answer the  question properly I'm going to have to get kind of pedantic LCD TVs are not susceptible to burn-in  by the commonly accepted definition of the term burn-in. burn-in is a term that was coined back  in the CRT TV days when CRT displays were used for computer monitors video arcade consoles and  even commercial displays what happened was that the phosphors coating the back of the TV glass  were burnt up by the cathode ray tube in the TV and that caused a burned in image that term  carried through to plasma TVs and now OLED TVs and technically it's an inaccurate description  of what is actually taking place when plasma at OLED TVs get uh burned in image it's because  the phosphorescent gas in plasma or the organic compounds in OLED in certain parts of the screen  get worn out faster than surrounding areas so it's more like burnout really now you can think  of an LCD cell like a little lens that lets light through when it's open and shuts down light when  it's closed it can't really burn in it can get stuck but that's a different issue anyway you  can't burn in the CNN logo on your LCD TV however the longer and harder you drive an LCD TV the more  the LCD cells and other parts of the TV will wear out you may start seeing some vignetting  uh Darkness around the edges and corners of the TV you may see the image on the TV getting dull  after a ridiculous number of hours of use but you will not get burning Joe S wants to know if it's  safe to assume that the Vision Pro with AirPods Pro used for audio is not going to be able to  give you that seat rumbling high pressure punch in the chest feeling that you can get from a proper  speaker based audio system with high quality subwoofers yes Joe that is true earbuds and even  headphones can't hit you in the chest with sound you need to move a lot of air for that concussive  effect now you will get a sense of Fairly deep bass and impact when you listen to headphones  and the AirPods Pro they're okay for Basse I suppose but you need large diaphragms moving  air all around you in order to really feel that now I would love to see some way to incorporate  base transducer sometimes called Bas shakers to give a Vision Pro experience a little more  visceral effect but even then it's still not the same as having subwoofers that shake you and the  things around you Marcel writes Caleb how are you so impossibly handsome and SE whoa wait how did  that one get in there sorry not sure how that one snuck in next Brand Hornick wants to split  this signal from a satellite receiver to two OLED TVs one will need a 6-ft cable and and the other  a 30ft cable and he wants a recommendation on a splitter to do this Brad I would probably just  get the mono price Blackbird 4K 1x2 amplifier splitter for $20 we'll put a link down in the  uh in the description and then get yourself some high quality HDMI cables mono price happens to  sell those too uh I just pick mono price because they're easy and because I've used their products  before uh this is not a specific endorsement uh but it's a low hanging fruit I I trust their stuff  so maybe go with that now with the Amplified splitter you can probably get away without  using an active HDMI cable but if you have trouble with signal Dropout at that more distant TV even  with the Amplified splitter spring for an active fiber optic HDMI cable they're a little bit more  pricey but it will do the job uh Beyond 30 ft even folks I think that's a good place to stop thanks  as always for watching if you're new to this series we do it every every week so subscribe  to the channel for more hit this video with a like it helps our Channel tremendously and thank you so  much I'll see you all on the next one and until then here's two other videos I think you mightlike\n"