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Hard Reset Xiaomi: How to Format a Mobile With MIUI

Formatting your Xiaomi mobile can be a very good idea if it is presenting problems or any other situation. The most common problems are always slow in the system, errors, and failures, or poor battery, and a good hard reset to reset your Xiaomi, can be a great way to solve the faults.

You may be experiencing some other more advanced problem and you want to apply a Hard Reset to your Xiaomi (Delete everything and leave it at the factory) because in this tutorial I will explain from the simplest method to the little more advanced methods so that you can flash your Xiaomi in the way that is most convenient for you. Let’s get to work.

Why should you reset your Xiaomi mobile?

Performing a hard reset on your Xiaomi is a very good idea for various reasons or circumstances which I am going to indicate below. Most of the time this is done to improve the performance of the mobile and extend its useful life, but that is not the only reason.

Slowness in the system

It is very likely that on some occasions you have suffered slowness in your Xiaomi device because let me tell you that even the best mobile is not safe from being slow after a long time. This happens mostly due to the accumulation of data in your memory, which being saturated causes the device to be slow.

By applying a factory reset you will be eliminating all unnecessary files, thus leaving the most important things and clearing your memory of junk files.

Failures in updates or modifications

It may be that a failure in an update or modification in the system may be causing a problem in your device, these problems can be solved simply by resetting the Xiaomi mobile to how it came from the factory.

Although the flash in Xiaomi can be a good solution, there are problems that cannot be fixed with a factory reset because they are errors from the same manufacturer of your device, so it can only be fixed through updates by the same. Keep that in mind before starting.

Virus or malware

If you think your mobile has been infected by a virus or malware, a factory reset can very quickly solve your problem. Downloading files or applications from untrustworthy sources may cause your mobile to become infected with malicious software.

If you are a user who likes to download applications that are outside the Play Store or files from web pages, it is recommended that you install one of the best antiviruses for Android that you can get in the Play Store.

Battery problems

A common problem in Xiaomi is battery drain due to software problems. Some applications may be draining your mobile battery even so, without using them. Not only that but many more complicated problems that may be draining your mobile battery in an incredible way.

Are you going to sell it or give it away?

Selling or giving away your mobile with your data still inside it can be very risky for your privacy, so when you go to change mobile, make a backup copy of it first and then reset the old mobile to the factory state. The flash in Xiaomi totally removes all the information, without the possibility of recovering it.

What remains to be done is to restore the data from the old mobile to your new mobile and you will no longer have any problem, so the person who is going to deliver your old mobile will have it as it came from the factory and can configure it to your liking.

Before starting…

Before formatting the Xiaomi, you must take into account some basic factors, but important, since you will erase all the data that is on the mobile and this process cannot be undone. IF you have doubts about any step of the procedure, you can leave your comment to guide you.

Make a backup

As you should already know, resetting your mobile will erase all the data it stores, leaving it as it came from the factory. The best thing you can do to avoid losing your important data is to make a backup. You can do it in several ways, but I am going to explain the simple way step by step:

  1. Open the Settings app on your Xiaomi.
  2. Then, go to the section> Additional settings > Backup and reset.
  3. Tap> Local backups .
  4. You select all the content you want to protect.
  5. Finally, click on> Backup.

After following these steps, the backup will begin to be created on your Xiaomi, you just have to wait for the process to finish and voila, you will have your data backed up. Once you do the Hard Reset to your Xiaomi, you can restore this backup and have all the data as you had it previously.

Make sure you also make a backup copy to your WhatsApp, because the Xiaomi settings do not allow you to backup WhatsApp. You will have to do it manually from the application. To be able to do it you must follow these steps:

  1. Open WhatsApp on your Xiaomi.
  2. Click on the three dots in the upper right.
  3. Again in> Settings > Chats > Backup .
  4. Click on ” Save to Google Drive ” and voila, it will begin to be created.

Once everything mentioned is done, you will be ready to format your Xiaomi.

Make sure you have enough battery

In order to start the Xiaomi Hard Reset process, you must make sure you have enough battery since if you do not have enough, serious errors can occur on your mobile.

It is best to have the battery fully charged, or at least above 50%. If you can leave your mobile connected during the process, it can be much better.

Follow the procedure as explained

If you are going to perform a Hard Reset from the recovery menu, you must follow the steps as explained below. The recovery menu is a menu that is installed on the mobile, in which it is possible to carry out activities that cannot be done in the operating system. Basically, this menu, which by its acronym in Spanish means ” Recovery mode ” serves to fix problems with your mobile if it does not start or has more advanced problems.

In this menu, the touch input will not work, so you will have to navigate and select with the physical buttons of the Xiaomi mobile. You must be careful what you select since the processes that come out here cannot be undone. Likewise, the Hard Reset, once it is executed, cannot be undone.

How to reset Xiaomi from the system

The easiest and safest way to format your Xiaomi is to do it from the device’s own settings, to be able to do it you just have to follow these steps:

  1. Open the settings of your Xiaomi mobile.
  2. Go to> Additional settings > Backup and reset .
  3. In the personal data section, tap> Factory data reset.

After having followed the previous steps, you will enter the final process of erasing all the data from your Xiaomi, including the system settings, your MI account, application data, and other mobile data.

You will have to authorize the process by entering your password with which you unlock the mobile. Once entered, the process will begin and all existing data on your Xiaomi will be deleted.

Hard Reset on Xiaomi from recovery mode

If the previous step for some reason does not work for you, you can try to reset your Xiaomi in the recovery mode. It is very simple to do, and on MIUI mobiles it can be done in two methods:

Access from the system

The first method is to access the recovery mode from the settings of your mobile, you can do it in the following way:

  1. Go to settings.
  2. Head to> About phone > System updates > More options .
  3. Finally, click> Restart to recovery mode.

Your mobile will restart and then enter the recovery mode, where you can do a hard reset. In this mode the screen will not work, so you will have to use the volume +/- buttons, to finally do the Hard reset, you must follow these steps:

  1. Using the volume keys +/- look for the option called ” Wipe data ” or ” Factory Reset “
  2. Access it using the on / off-key.
  3. Finally to confirm.

You wait for the mobile to restart and it will begin to reset the factory, once the mobile is finished it will start to start Android as normal and all the data will have been deleted.

Access using physical buttons

You can also format your Xiaomi from the recovery mode using the physical buttons, in case the previous method does not work for you or for any reason you cannot do it. To do this you must follow these steps:

  1. Turn off your cell phone.
  2. Press the Power / Volume + buttons at the same time.
  3. You do this until the phone vibrates and shows the ” MI ” logo.
  4. When the logo appears, stop pressing the buttons.
  5. You will get a menu in Mandarin or English.
  6. Click on the button above the blue bar on the right side to switch to English.
  7. When the language has been changed, select> Recovery > Ok.
  8. In ” Main menu ” select> ” Wipe data “.
  9. Finally, select> ” Wipe all data “.

When you have done all this process, the mobile will begin to factory reset. This will take a while, but then the operating system will start normally without any data.

If you have a custom recovery (TWRP)

A custom recovery is a tool that facilitates navigation through the recovery mode of mobile phones, but not only that, it also allows Xiaomi to flash files with the .zip extension, thus allowing you to change ROMs or root very easily.

If you have TWRP installed on your mobile and you want to perform a hard reset on Xiaomi, you can do the following:

  1. Turn off your cell phone.
  2. Then turn it on by pressing the Power / Volume + keys.
  3. Select the Recovery option.
  4. Slide the safety bar.
  5. Again, click on Wipe Data and confirm by typing the word Yes.
  6. Finally, the device will start to reboot.

And voila, your Xiaomi mobile will be as it came from the factory and you can start restoring all your data.

Flash Xiaomi via flash tool

Flash your Xiaomi, you will install the operating system again or update it. It is advisable to follow this process if you have problems with your Xiaomi mobile, such as a problem at startup, a badly installed ROM, or software problems.

This process is similar to reinstalling an operating system or formatting a PC; The difference is that on a PC the process can be the same for almost all models, while on a mobile it can vary by model or manufacturer and even by country.

In order to flash your Xiaomi, you must have a PC and a USB cable to connect your mobile, after you have everything, follow these steps:

  1. Download and install the XiaomiMiFlash.exe program here
  2. Run the program.
  3. Turn off your Xiaomi mobile.
  4. Press the Volume- / Power keys at the same time for a few seconds. This is to start in Fastboot mode
  5. Connect your Xiaomi mobile to your computer via USB cable.
  6. Click> Select .
  7. Find the folder where you have the ROM unzipped. (If you don’t have the ROM downloaded from your device yet, you can download it here, and then unzip it into a folder)
  8. Once you have found it, press> Ok.
  9. In the program, click> Refresh.
  10. With your mobile connected to the computer, you will be able to see it reflected in the program on the COM port.
  11. At the bottom right, click the checkbox> Clean all and lock.
  12. Finally, click> Flash.

When the process of flashing ROM in Xiaomi has finished, you will see the green bar, indicating that the process has been completed successfully.

 

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TUTORIALS

How Does A Bluetooth Headset Work

In this post about wireless headphones, we are going to try to clear up concerns in relation to their operation, mainly for all those who try to understand something beyond its simple use to listen to music.

This is something very interesting that helps us to have more information when buying a wireless headset and know what to take into account.

In the same way, we are going to talk about a feature that several models of headphones today include in order to provide better practicality in everyday use: wireless headphone technology called Bluetooth.

In recent times, wireless technology in headphones gained a significant following thanks to smartphones that lost the P2 (3.5mm) input for the headphones. At the same time, there was a greater popularization of the most affordable headphones from Chinese companies, which is why today it is simpler to buy a Bluetooth headset.

In today’s market, we find more than one type of wireless headphone technology, although the most popular and efficient today is Bluetooth. Due to this, we will analyze below what Bluetooth technology is, how it works and how it is applied in the audio of our headphones.

How Bluetooth Technology Works

Bluetooth wireless technology uses radio waves to connect different types of gadgets such as laptops, smartphones, and tablets.

Bluetooth makes use of radio frequencies, more specifically the 2.45 GHz frequency, and as this frequency band is widely used, it is a requirement to ensure in some way that Bluetooth does not suffer interference and that it does not produce them either. For which, they took advantage of the communication by FH-CDMA (Frequency Hopping – Code Division Multiple Access), which allows the moderation of the interference indices, dividing the frequency into 79 channels (or 23, subject to each country).

Differences between Bluetooth 4.2 and 5.0

The first thing we notice in Bluetooth 5 is that the range was optimized. While version 4.2 has a range of up to 50 meters in an open environment and up to 10 meters in an indoor environment (with walls), version 5 manages to provide a range of up to 200 meters in an open area and up to 40 meters in a closed environment.

This increase in range potential is due to the fact that Bluetooth 5 provides a changing transmission speed. It manages to use 4 levels of data transmission and is regulated according to the requirements of the gadget being used.

You can automatically switch between the following transmission speeds: 2 Mbps, 1 Mbps, 500 kbps, and 125 kbps. The lower the data rate, the greater the distance reached in data transmission.

For example, smartwatches do not need to send a large amount of data and consequently accept a transmission speed of 125 kbps, providing a range of up to 200 meters in an open environment. However, when a large continuous stream of data such as 1 Mbps or 2 Mbps is required as is the case with wireless headphones, for example, the range is greatly reduced. But do not worry, Bluetooth 5 will allow you to walk quietly throughout your house without great losses depending on the kind of Bluetooth you use (which is different from the Bluetooth version).

The second feature that stands out in Bluetooth 5 is battery saving. It manages to standby for a longer time and consume less power than its past generation (4.2). This is made possible by the enhancement of Bluetooth Low Energy (BLE) technology that was introduced in Bluetooth 4.0. It was created thinking about applications that require low data transfer (less than 1 Mbps) and for that, it uses the GFSK (Gaussian Frequency-Shift Keying) modulation system.

Finally, another feature that draws attention to version 5 of Bluetooth is the ability to transmit data in a single packet. In Bluetooth 4 this rate is 31 bytes per packet, while in Bluetooth 5 this value increases to 255 bytes per packet.

How to use Bluetooth 5.0 on technology devices

You will need a smartphone, tablet, notebook or other devices that support Bluetooth 5.0 and a headset that supports that version of Bluetooth. Both devices must be compatible with the technology to be really used, otherwise, the mobile will use an older Bluetooth version.

Bluetooth classes

To make it possible to adjust Bluetooth to the most varied types of devices and purposes, the maximum range of the technology has been divided into four classes:

Class 1: Maximum power 100 mW (milliwatts) range up to 100 meters;

Class 2: Maximum power of 2.5 mW, range up to 10 meters;

Class 3: Maximum power of 1 mW, range up to 1 meter;

Class 4: Maximum power of 0.5 mW, range of up to 50 centimetres.

Bluetooth profiles

Bluetooth profiles are protocols that define what functions can be performed by devices that have Bluetooth.

There are currently around 40 different profiles, but some of these are found more frequently on devices that have this technology. The most relevant Bluetooth profiles for us will be presented below:

Advanced Audio Distribution Profile (A2DP)

This profile is responsible for transmitting audio from one Bluetooth device to another. It is used by all Bluetooth headphones and speakers today. Before the creation of this profile, Bluetooth audio was very grainy and only headsets were used for phone calls. The Bluetooth modules that support the A2DP profile have in them a set of audio codecs that can be executed according to the hardware capabilities. These codecs are designed to balance the needs for power use, audio processing, and sufficient data rates according to what is required.

Headset Profile (HSP)

This profile provides the ability to stream audio through the microphone to answer calls, and adjust the sound volume level. It is used together with the A2DP profile to be able to transmit the audio of the voices.

Handsfree Profile (HFP)

This profile gives the Bluetooth device the ability to make hands-free audio calls in cars or smartphones. Add features such as accepting, rejecting or ending a call without needing to touch, for example, on the mobile phone to execute the command.

Audio / Video (A / V) Remote Control Profile (AVRCP)

This profile allows the user to control the music or sound of the Bluetooth device by performing functions such as play/pause, forward / backwards; beyond controlling the volume. It is generally used in conjunction with the A2DP profile to enable sound transmission and control.

Audio codecs

The codec determines how Bluetooth will transmit data from the source to the headphones. Encodes and decodes digital audio data in a specific format. Thinking of an ideal situation, the data is transmitted through a high fidelity signal at the specified minimum bit rate. This will use less band while maintaining good playback quality, better distance capacity, and better headphone battery life.

Before we begin, it is important to say that to get the quality of the desired codec, both the source and the headphones must have support for that codec. Furthermore, it is also necessary to know the meaning of some terms to make it easier to read about the codecs below.

Basic codec terms

  1. Sample rate (Hz): is the number of data points per second in an audio file. You need two samples to accurately capture any frequency, so the audio is sampled at least twice the limits of human hearing (approximately 20 kHz). The sampling frequency of the CD is 44,100 Hz, which means that with every second of sound, 44,100 measurements of the signal’s voltage variation are taken. In this way, the higher the sampling frequency, the more accurate the representation of the signal. A higher sample rate means a larger file size.
  2.  Bit depth (-bit): is the number of bits saved for each audio sample. A sample represented by only one bit could receive only two values: “0” or “1”. On the other hand, a representation with 3 bits could receive 8 different values ​​(23 = 8): 000, 001, 010, 100, 110, 101, 011, 111. A CD has a resolution of 16 bits, which allows a binary resolution with 65,534 (216) values. A higher bit depth records a signal more accurately. A higher bit depth multiplies the file size.
  3. Bit rate per second (kbps): generally measured in kbps or Mbps. That’s the amount of audio data transferred per second, in our case via Bluetooth.

SBC codec (Low-complexity sub-band codec)

The simplest existing codec is the Low Complexity Subband Codec (SBC). It is present in all Bluetooth devices that have the A2DP profile, being a universal codec. Its transfer rates reach up to 345 kbps, enough to play compressed MP3 files. So in case you want high-fidelity audio, don’t expect too much from this codec.

AAC (Advanced audio coding) codec

The AAC codec was developed by Bell Labs, Fraunhofer Institute, Dolby Labs, Sony, and Nokia. It is the standard format for iPhone, iPod, iPad, Nintendo DSi, Nintendo 3DS and PlayStation 3. It is compatible with PlayStation Vita, Nintendo Wii, Sony Walkman, Android and BlackBerry.

The codec can provide a data transfer rate of up to 250 kbps. But despite having slightly lower performance, AAC is widely praised among compression algorithms and is considered a breakthrough over the SBC codec.

Apple has chosen to adopt the AAC codec for all its devices, in addition to the SBC codec, which is a requirement to have the Bluetooth A2DP profile. Apple Music streams with AAC natively, making it the best choice for an AAC or ALAC file library. For best results, you should pay attention not to use your iPhone to stream other compressed audio formats. The compressed files in MP3 or Ogg Vorbis format Spotify must be decoded by the iPhone and then encoded in AAC before they are transmitted to the headphones.

AptX codecs

The aptX codecs were developed by Qualcomm with the aim of offering a quality that was close to that of a CD, offering a rate of 16bits / 48KHz with a data transfer rate of up to 352 kbps. Even in this way, aptX still adds lossy file compression, compromising the final sound quality.

The aptX HD was created specifically to obtain higher resolution audio and fewer losses than the first version. It is a codec capable of reaching a speed of 24bits / 48kHz in LPCM (Linear Pulse Code Modulation) with a data transfer rate of up to 576 kbps. This already provides significant gain compared to aptX or SBC in terms of sound quality.

To decrease audio latency in Bluetooth headphones, aptX Low Latency was created, thus enhancing gaming and video experiences. It is a codec that has a latency of fewer than 40 milliseconds with a data throughput of up to 420 kbps.

And finally, to improve the battery consumption of the headphones, Qualcomm has developed the aptX Adaptive codec that changes the data transfer speeds according to what the file that is being played requires. This codec supports a data transfer rate of up to 420 kbps.

LDAC codec

Sony, in order to achieve the best sound quality in the Bluetooth headphone market, has created its own codec called LDAC. It has the ability to vary the bit rate according to the definition of the song and is capable of maintaining a speed of 96KHz / 24bits with a data transfer rate of up to 990 kbps. This data transfer speed is almost twice that of aptX HD and three times that of SBC. Fortunately, in the case of LDAC, it is possible to find non-Sony Bluetooth devices that support this codec. In this way, you will be able to obtain an audio quality superior to the aptX HD codec.

UAT codec

Hiby has recently developed its own codec, Ultra Audio Transmission (UAT), to overcome all the barriers of the existing ones, including Sony’s LDAC, and has managed to achieve a sampling rate of 192 kHz with a data transfer rate of 1200 kbps. There are still few devices compatible with this technology, but it is something surprising and that raises the quality that we have in our Bluetooth headphones even more.

How to use the best possible audio codec

Even in the case of Bluetooth 5.0, you will need a smartphone, tablet or laptop, and a headset that supports the desired codec (either aptX, LDAC or UAT). Both devices will need to be compatible with the technology to be really used, otherwise the mobile will use the SBC or AAC codec, which are inferior in terms of audio quality when compared to the other codecs mentioned.

Bluetooth does not support high-quality audio when the microphone is in use

When only the earphone is used to listen to some sound, the A2DP profile is activated and consequently, you are able to use codecs such as aptX HD, aptX Low Latency, LDAC, etc.

However, when you need the microphone, the Bluetooth profile will change to HSP (Headset Profile) or HFP (Handsfree Profile) and this will cause the audio quality to drop sharply because Bluetooth does not have enough bandwidth to maintain the audio quality and at the same time send data from the microphone.

This problem of lack of data transmission capacity can be improved with the use of Bluetooth 5.0 which has several improvements in terms of speed and data transmission capacity.

Apple W1 chip

Apple has a chip inside their headphones with a specific audio codec that can only be used on Apple devices. In case you do not have, for example, an iPhone and want to pair the AirPods on your Android smartphone, you will not get the same sound quality.

Also, if you have a better Bluetooth headset than Apple’s with support, for example, the LDAC or aptX HD codec, and you want to connect to an Apple device, it will unfortunately not be possible to benefit from these codecs. Your headset will use the SBC and AAC codecs which are simpler and low in quality compared to the other currently existing codecs.

Advantages and disadvantages of wired and wireless headphones

After all that has been talked about, you may have realized that Bluetooth technology in wireless headphones is by no means simple, requiring a lot of engineering and skill from both the source and the headphones themselves. All the development of Bluetooth versions and profiles, plus audio codecs, comes at a great cost.

In addition to having a cost in terms of technology built into the Bluetooth device, we still have the cost of the battery to keep the hardware working, the Bluetooth radio wave receiving antenna and the integrated chip with DAC and amplifier inserted inside the Bluetooth headphones. .

Unfortunately, this raises the price of a good wireless headset considerably. So do not fall into the mistake that cheap headphones of this type will offer you good quality since it is a challenge to balance the cost of Bluetooth technology with the sound quality of the headphones and with the quality of the materials used in the headset. manufacturing.

The Bluetooth headset, despite its high cost, makes it much easier to play sports by listening to music or a podcast, watching movies without disturbing others, or simply studying. All this without cables. However, if you prioritize sound quality above all else, it is interesting to consider the alternative of wired headphones over Bluetooth, since this technology has its limitations.

In terms of audio quality, regardless of the value, we still have some compression and degradation of the audio in headphones that work with Bluetooth technology compared to those with a cable. It also adds the audio latency problem that many wireless models, depending on the codec and the version of Bluetooth, still have.

In short, the wireless headphone market is constantly evolving and getting better and better. In the meantime, it will only be possible to obtain higher quality at a high cost, so it is important to weigh priorities.

In the future, the cost of the technology is likely to decrease, as well as an improvement in it. Meanwhile, you will hardly achieve the sound quality of a wired headphone. Just look at the headphones from the best manufacturers, none who intend to produce the best headphones in terms of quality are using Bluetooth technology. By contrast, all aspiring headphones have cables.

Does the device affect the quality of the Bluetooth audio?

If we were using the same audio codec, it will not affect the audio quality to use a different mobile phone (or laptop or tablet), model. This occurs because the function of the Bluetooth signal transmitting devices is only the transmission of the digital signal that has to be converted to the Analog signal so that the headset can emit sound.

Conversion of the transmitted digital signal (via an audio codec such as aptX HD or LDAC) and further amplification occurs within the Bluetooth headset, via an integrated circuit board that has a DAC and a system amplification.

That is if your smartphone has support for the aptX or LDAC codec and your Bluetooth headset has to support the same codec, the headset will sound the same even if you use another phone model (which also has support for the same codecs).

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TUTORIALS

OLED Monitors: Can an OLED TV Be Used as a Pc Monitor?

At CES 2019, Dell already showed us the promise of an exciting new future for Alienware gaming monitors with OLED displays for gaming.

Technically it was amazing. 55-inch screen, 4K resolution, 120 Hz refresh rate, HDR, color gamut up to 95% of DCI-P3 and support for variable refresh rates. These features fueled many enthusiasts for an OLED monitor, but it looks like it will still take a few years to become a reality.

Disadvantages of OLED panels

According to some sources, the purchase cost for a wholesaler of a 55-inch Samsung OLED panel is estimated at about $ 800. And Samsung, which is the world leader in the production of OLED (Organic Light-Emitting Diode), continues to have losses in all panels. And we are talking about 60 Hz panels, 120 Hz panels are much more expensive. So Samsung has shifted its focus to smaller and more cost-effective OLED panels for smartphones. Therefore, it is estimated that a 55-inch gaming monitor could go on the market for more than 3,000 euros, a price difficult to justify.

Also, keep in mind that such a large monitor is impractical for most people’s normal desktop use, even the smallest OLED options like the 48 ”LG CX48 are too big. Even 40- to 43-inch “monitors” aren’t comfortable and you end up with a sore neck and constantly having to move your head to view different areas of the screen.

Also, a 55-inch 3840 x 2160 pixel (UHD 4K) monitor has a density of 80.11 pixels per inch (a pixel density very close to that of a 27 ”1920 x 1080 monitor). This density may be suitable for games and multimedia, but not for general use for text documents, web browsing, photo editing, etc.

Another of the weaknesses that will worry the most about OLED panels is their tendency to produce burns when there are still images (the fly of television networks, HUDs in video games, etc.). This means that if we play a video game or the same program for many hours, the part of the screen that shows fixed information can be permanently marked on the screen. For example, the operating system’s taskbar will appear lightly when we are playing a game… Fortunately, OLED panels have been improving a lot and also have refresh technologies that prevent these problems.

OLED panels have a shorter lifespan of around 14,000 hours, slightly lower than their rivals. This shorter shelf life also affects color degradation over time. Although it is not such a serious problem for games and multimedia, it can be very problematic when editing photos. Therefore, you will need a reliable way to calibrate your screen over time to ensure consistent color consistency.

Lastly, OLED panels usually offer a slightly lower maximum brightness than their rivals.

Advantages of OLED panels

OLED panels work in a different way than other panels since each pixel lights up independently. In a normal screen, we have a matrix of white LED lights that through filters produce different colors. This design has the drawback that, by producing black pixels, some light is filtered out and makes the blacks not pure (they are dark grey).

On the contrary, OLED panels are capable of producing pure blacks since the one-pixel black LED does not turn on. For this reason, OLED panels have a much higher level of contrast. Thanks to this they achieve impressive image quality.

This way of operating, without backlighting or backlighting, has a couple of immediate benefits. The first is that OLED displays can be thinner. The second is that they have lower energy consumption.

Characteristics Between OLED and Other Technologies

As we already know, what we see on a screen are a succession of still images that change many times per second. Gaming monitors should have a refresh rate of 144 Hz and above and luckily there are already OLED monitors that reach that figure. Of course, there are monitors with TN and IPS panels that far exceed that number. Even so, 144 Hz should be valid for the vast majority of users.

The response time is the milliseconds it takes for a pixel to change from white to black and vice versa color. Long response time causes fast movements to trail and ghosting which makes the image less sharp. OLED panels have very fast response times, even better than gaming monitors with TN technology.

Variable vertical sync technologies (Nvidia G-Sync and AMD FreeSync) are extremely important because they eliminate tearing, stuttering, and decrease input lag. Many OLED televisions are already beginning to be compatible with these two technologies so that users can better enjoy their video games.

Conclusions

OLED panels can be used as gaming monitors, however, I think that to this day they still do not have enough value for money to be worth it.

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TUTORIALS

Display Resolution: What Are They and What Do You Need

One of the most important features when buying a computer monitor or television is screen resolution. And, although it is a simple aspect to understand, unfortunately, the acronyms and the marketing make it quite confusing … For example, the immense of the 4K monitors that are sold, are not 4K, they are UHD.

What is the resolution of a screen?

The resolution refers to the number of pixels that make up the image of a screen. A pixel is at a small point on the screen.

Resolution is usually specified as the number of horizontal and vertical pixels that make up the image, for example, 1920 x 1080 pixels. That means the screen has 1920 horizontal pixels and 1080 vertical pixels.

The total number of pixels will be the multiplication of both numbers. Older displays had less than one million total pixels, 1080p (1920 x 1080) displays have just over 2 million pixels, 4K displays have over 8 million pixels, and 8K displays have over 33 million pixels. pixels.

What is the aspect ratio of a monitor?

The aspect ratio of a monitor is the proportional representation that describes the correlation between the width and height of the screen.

Modern Resolutions

720p or WXGA

A 720p screen typically has a resolution of 1280 x 720 pixels, just under 1 million total pixels (megapixels). They are sometimes also called HD or HD Ready displays, although in reality those usually have a resolution of 1366 x 768. It doesn’t matter much either. Today, they are quite low resolutions and practically all computer monitors and all televisions have higher resolutions.

1080p or FullHD (FHD)

The FullHD displays have a horizontal resolution of 1,920 pixels and 1,080 pixels of vertical resolution. There are still many monitors and televisions that use this resolution. Of course, I would not recommend buying a monitor larger than 24 or 27 inches with this resolution. The pixels are quite large and, although they do not bother in games, in office automation they can be noticed.

QHD 1440p, the misnamed 2K

1440p displays contain 2560 x 1440 pixels, and as monitors increase in size, the resolution is becoming more common. This resolution is also known as QHD or Quad HD as it has 4 times the resolution (twice the pixels in height and twice the pixels in width) than 720p HD displays.

As you can see, until now the normal screens were named with the vertical resolution (720p, 1080p, 1440p…), however, from that moment on the name of the resolution will be the horizontal resolution.

Because this format has been caught in the middle of the transition, it is sometimes incorrectly called 2K. And I say incorrectly because the 2K resolution (referring to the new fashion, horizontal) would be the 2048 x 1080 resolution that was used in the world of cinema before 4K.

UHD Vs. 4K Resolution

Although they are often confused, UHD and 4K resolutions are not the same . As we have seen in the table, the UHD resolution is 3840 x 2160 pixels, while the 4K resolution is 4096 x 2160 pixels. It is a bit wider.

4K is a professional cinema standard, while UHD is a consumer standard.

The term “4K” was originally derived from the Digital Cinema Initiatives (DCI), a consortium of film studios that standardized a specification for the digital production and projection of 4K content. In this case, 4K is 4,096 by 2,160, and it’s exactly four times the previous standard for digital editing and projection (2K, or 2,048 x 1,080).

4K resolution referring to the number of vertical lines as 2160p

The UHD or Ultra High Definition (ultra high definition) is the next step of what is called Full HD, the official name for the screen resolution of 1,920 by 1,080. UHD quadruples that resolution to 3,840 by 2,160. And while it is not the same as the 4K resolution we just saw, almost all televisions and monitors that are advertised as 4K are actually UHD.

8K Resolution

The 8K resolution is the highest resolution currently available and is 7680 × 4320 pixels. There are still very few monitors and televisions with this resolution, and the ones that are there are extremely expensive.

Summary

Resolution is one of the most common specifications used to sell televisions and computer monitors, partly because “4K” and “8K” are easy to remember and claim to represent the latest of the latest in high technology.

However, the resolution is not the most important ingredient in image quality. Just because one monitor has a higher resolution than another doesn’t always mean it looks better. It can be, but not always, and for reasons that have little to do with resolution. When buying a monitor, you also have to take into account contrast, dynamic range, color representation, etc.

  • What does 4K mean? It should mean that a screen is 4096 x 2160 pixels, but typically 3840 x 2160 pixels.
  • What does UHD mean? It stands for “Ultra High Definition” and, although incorrectly, it is often synonymous with 4K.
  • Do you need a 4K monitor? No, unless you are buying a monitor larger than 30 inches.
  • Is 8K worth worrying about? Do not.
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