LCD or electronic paper

Check out the topicFAQ on e-books

Due to the peculiarities of screens on electronic paper (e-ink, EB), these screens are interesting only for reading books, where a static picture is mainly needed, since electronic paper has a very long response time measured in seconds. Therefore, this message is about choosing the type of screen for reading books. For reading books, it is important that the eyes get tired as slowly as possible, so as not to spoil the vision, in this regard, screens on electronic paper for reading are much preferable, since they completely lack flickering and uneven backlighting, and they do not fade in bright light. Electronic screens are mainly issued without backlighting, which does not allow reading a book in poor lighting conditions, so for reading in dark places it is better to take backlit electronic paper. The long response time of electronic devices affects the final functionality of the device, therefore, in addition to reading books, a device on electronic paper can also be used to listen to audio books and music. Electronic devices work much longer than their counterparts on the LCD, both in the operating mode and in the standby mode due to the fact that the screen of such a device in the reading mode does not consume anything, energy is spent only on turning pages, but again very low power. If you need a multifunctional device, it is better to take a device with an LCD screen. At the moment there are devices on colored electronic paper, but they are very expensive and there is little choice among them, but they are much more preferable for reading books with color schemes or drawings, for example.

Advantages of devices on electronic paper:
- Zero screen power consumption in reading mode and low in paging mode, as a result of significantly increased operating time;
- Significantly less tired eyes compared to LCD and AMOLED;
- The contrast does not change from the viewing angle;
- Does not fade in the sun, the brighter the lighting, the brighter the picture.

Disadvantages of devices on electronic paper:
- Limited use, only for reading books, listening to audio books and music;
- The cost of devices with color inks is quite high;
- A very long response time (update speed), with a partial update to increase the update speed, artifacts may appear on the screen from the previous image.

There are several types of electronic paper:
SiPix is ​​an obsolete type of EB, almost never used, not worth the attention today;
Vizplex is an obsolete type, not worth attention today;
Pearl is the most popular type of EB, which is suitable in most cases;
Pearl HD is the same as Pearl, but with an increased resolution, when choosing, you should not pay attention to the device just because of the type of Pearl HD, since the resolution doesn’t really affect the picture quality
Flex is the same as Pearl HD
Triton is colored electronic paper, most preferably, but devices using this technology are very expensive.

You can learn more about screen types at the following link.http://e-ink-reader.ru/display.html

Post has been editedmainbord - 10.06.14, 18:29

Features of the choice of devices for navigation

When choosing devices for navigation, you first need to decide whether it will be a separate device for the car, which you will use mainly for navigation, or maybe watch movies, or whether it will be a multifunctional (pocket) device that you need to wear everyday with by myself. For navigation, the diagonal of the device is practically not important, in most cases devices with a screen size of 3.5 inches or more will do. Next, you need to select the operating system (OS). At the moment, you can find devices for navigation on the following OS: Android and Windows CE. The bulk of all navigators were released on Windows CE, now Android OS is preferred. Navigators on Windows CE are quite cheap and a lot of navigation software has been written for them and not only. Android devices today are already ahead of WinCE in quantity and quality, but inferior in price. On Android devices, you can easily watch almost any movie without prior conversion. Support for Win CE has been discontinued and it is worth buying a device on WinCE only in case of an extremely limited budget. Consider iOS and Windows Phone specifically for navigation is not worth it because of the cost, lack of choice and software. The navigation function on iOS and Windows Phone will soon become a pleasant addition to the basic functions of the device. When choosing a navigator, you should not focus on the software that is used for navigation, since you can always put the software that suits you. A very useful and rather mandatory function is the presence of a GSM module in the navigator for accessing the Internet and as a result, viewing traffic jams and significantly accelerating the connection of the GPS receiver to satellites and other services. It is worth paying attention to the presence of bluetooth or FM transmitter for connecting to your car's audio system. It is worth paying attention to the presence of the radar detector and anti-radar functions, which will help to deal with devices that measure the speed of the car. Particular attention should be paid to the function of watching movies, Android devices are more suitable for this, since they are more powerful. Do not forget about the basis of the GPS Navigator receiver chipset.

Do not forget that now almost everyone has very smart phones, on smart OS with large screen diagonals, which are very convenient to use for navigation, while you do not need to spend money on a separate device and suffer from its configuration, connection and carrying. At the same time, such a device can simultaneously perform the function of a DVR, the only thing worth taking care of is the car charger. Phones with a navigation function for pedestrians are preferred over a standalone device.

Post has been editedmainbord - 10.06.14, 18:34

Select navigation software

The following types of programs are commonly used for navigation:
Compass - requires hardware support, used mainly in handheld devices.
Subway Navigation - the program is almost any device.
Navigation for pedestrians and cars - requires a GPS receiver.
[b] Antiradar / b]

When choosing a navigation program and device for navigation, it is worth considering the following factors:

1. Laying a route and search for objects without the Internet Navitel, Cityguide and others. For example, Yandex and Google maps pave a route and search only if there is an Internet connection;
   
2. Cost and possibility of purchase. For example, Yandex and Google maps are supplied free of charge, while Cityguide and Navitel are sold fairly expensive;
   
3. Number of settings, availability of maps of different countries and cities, ease of use;
   
4. Display of traffic jams and building a route taking into account traffic jams, internet is required;
   
5. The possibility of laying a route on public transport. This feature is interesting for pedestrians and owners of handheld devices. For example, 2GIS, google, yandex and others have this feature, while 2GIS works without the Internet;
   
6. The presence of panoramas is a function that allows you to make virtual walks around the city;
   
7. Alert and database of cameras tracking speeding and other violations of the vehicle;
   
8. Search for objects on the map: banks, cafes, gas stations;
   
9. The presence of POI points.
   

Post has been editedmainbord - 04.07.17, 23:00

Features of the choice of devices for watching movies and web pages

Section for selecting devices for watching movies and web pages -Laptops, Tablets, TabletPC, UMPC, MID

Watching movies and browsing the Internet outside the home is a very specific task, and in most cases handheld devices that we use as a phone perform this function. Before buying a separate device for watching movies and web pages, think about whether you need it, whether 5 minutes in the subway with a movie and the Internet are deadly important for your life. Most people buy tablets for viewing web pages and movies at home, but think about why you need it if you have a home theater and computer, watching movies and browsing the web is much more convenient.

If you still decide that you can’t live on business trips without films and games, then let's move on to choosing a device. The most important thing in these devices is the screen size. First of all, as for any other device, you need to determine the diagonal of the device. In most cases, the diagonal of such a device is 5-10 inches, which quite comfortably allows you to watch movies and browse the Internet, but the more the better. Next, you need to decide on the operating system. Only Android is suitable for watching movies, since the devices on it and in performance are most suitable for this task, and most importantly, ease of use, since we can throw off absolutely any movie, any format and at the same time the device will lose it and we will not you have to convert the film and spend time on it. Any OS is suitable for the Internet, in principle, the only thing that can be noted is that if you select a device on the Android OS, you need to select the technical specifications for a comfortable viewing of web pages without brakes. Android has an advantage over other OSs for the Internet, as it supports flash, on which most games and video players on the Internet are written.

Post has been editedmainbord - 21.04.13, 22:13

What should I look for when buying a particular device?

Start by reading the information in the adjacent phak:FAQ on buying portable devices abroad (Post # 6419669)

When reading reviews on the Internet, you need to consider that usually those who have problems write to the Internet and they came to the forum in the hope of finding a solution to their problem. Therefore, do not be upset if a lot of negative reviews are written in the topic about the device that you are going to buy, in fact, the percentage of the total share of users is not so large, and in general very few people visit the forum. Those people who are doing well with the device usually don’t write anything on the Internet. All problems on devices should be divided into those that can be solved and those that cannot be solved (marriage). Problems that are related to animation brakes can be solved on any device. Problems that can be solved after the purchase are found on absolutely all devices and do not depend on the company, model, firmware or other factors, they always exist, even if they are not written about on the forums, but since these problems can be solved, attention is paid to them do not pay. Before buying a device, write down the defect typical for this model, so that you can immediately check for a defect when buying. The marriage of a device can usually be found when inspecting the device before buying, in this case, ask the seller to bring another model or just do not pay the money. If the store refuses to show you the device before payment, or during the inspection there are any suspicions, it is better to refuse to buy in this store.

Post has been edited-del- - 18.04.13, 18:27

Reliability and quality

The desire of the consumer to buy a device without software and hardware problems is quite natural. No manufacturer can provide a 100% guarantee that the phone will work and will never freeze, or that nothing will break in it within a year. In practice, there is a marriage on any device and there are software problems (glitches). The manufacturer can guarantee only free repair for a certain period after purchase. Absolutely any device can have both hardware and software problems, so you should not look at some company and think that it has fewer problems and defects than another, in fact, everything is the same everywhere. The quality of cases on average is the same for all devices, any device will break and scratch when dropped, no matter what material the case is made of. Software problems (glitches), brakes and other problems can occur absolutely on any device, it does not depend on the device’s firm, model, cost and operating system. Almost all software problems on the device can be solved immediately after purchase. Before buying a device, you should read reviews about the device, write a marriage, and immediately check for its presence upon purchase.

Post has been edited-del- - 18.04.13, 18:29

Sound

Sound quality can be divided into the following components: volume and sound quality (frequency response uniformity), in headphones and on the speaker. On average, the sound is the same in all devices. It is impossible to evaluate objectively the sound in the device, each will evaluate in his own way. You can find certain devices where the sound is better, louder, but it is hardly worth paying attention to, if you really need a good sound, it is better to buy a good player. Taking a multifunctional device with a slightly better sound, and losing everything else is not reasonable. Do not forget that all devices have an equalizer, if you do not like the sound, you can always customize it for yourself. It is useless to ask the owners of the device about the sound, since everyone evaluates biasedly and in different conditions. In order not to spoil the good sound quality at the output of the headphones, good headphones must be used. As a rule, mediocre headphones usually come as standard for multifunction devices.

Frequency response tests of some models can be found on the websitehttp://www.gsmarena.com/

Post has been edited-del- - 18.04.13, 18:30

Watching movies and videos

1) The need for quality.
The resolution of the film. To get started, read about the optimal resolution.FAQ on the selection and comparison of portable devices (Post # 20037253).
Naturally, a 720p movie is better than 480p, but it makes no sense to play a movie with a resolution higher than the screen resolution, since the picture on the screen will be exactly the same in both cases. We can definitely say that a portable device does not need a movie with a capacity of 30 GB or even 10 GB. On portable devices, the diagonal of the screens and their quality is not so high as to reproduce a high-quality film. Multichannel and high-quality sound is inserted into films, which can be half the volume of the film, often several sound tracks for different languages ​​are inserted. All this is not necessary on a portable device, since good sound cannot be reproduced, and there are still no more than two sound channels. In most cases, even if your device supports a higher resolution, a DVD-Rip 480p quality movie is enough. Films with resolutions greater than 480p may be needed if the resolution of your portable device is greater than 480p, or you download only high-quality films and want to drop them onto the unit without first converting or transferring the film in a different format or quality. Really high quality or resolution of the film is needed only if you use the device as a player for a connected TV or monitor. In this case, the latest technological advances will be needed. Also note that the device supports MHL HDMI Miracast or MHL video output.

2) Ways to watch movies.
a) The first method. Convert the movie in its original format to a format that plays on the device without brakes. The advantages of this method is that absolutely any device will lose any film without any efforts and brakes. The disadvantages of this method is that it is a rather complicated procedure, it takes time and the quality of the film is lost. Now that everyone has fast Internet access at home, it’s easier to download a movie in the format and resolution that is more suitable for a portable device than to convert an existing file to the desired format.
b) The second method. Use the movie for what it is. This method is used more often due to its simplicity. It’s better to use an Android OS device in this method, since you can always install a player that will play absolutely any format for free on an Android device and uploading a movie to an Android device is much easier and faster. You can’t throw movies without converting to devices on iOS and Windows Phone, or you can, but it’s so difficult and limited that it’s easier and better to buy an Android device right away. Modern Android devices in most cases play any movie in any format with a resolution of 1080p without brakes.

Post has been editedmainbord - 04.07.17, 23:07

Do I need an update or a new version of the operating system?

What is the main goal of operating system developers now? Earn money, the faster and easier, the better. How do firms manufacturing portable devices make money? You are ready to pay for a faster processor, for more RAM, for a better screen, for an additional infrared sensor, but the possibilities of iron have limitations, and finally you get everything you would like to have, but in this case, you don’t need a new one smartphone. How did manufacturers deal with this problem? Easily. Let's come up with a feature that would make people buy a new device. The characteristic should attract people, therefore it should be expressed numerically, because numbers can compare everything. In this case, the numerical characteristic should be easy to increase. This characteristic is the version of the operating system. We’ll give her a serial number so that even narrow-minded people can understand that the new smartphone is better, because it has a higher version of the operating system. Now we need to convince buyers that this is the most important characteristic and provide evidence. However, at this stage no one thinks anymore, and, having seen the figure, they think more that it is better. Now consider the real situation. New versions of operating systems bring a new API. Applications are also updated, new ones come out, and they come out more and more under the new OS. The old version of the OS then ceases to be supported, and at some point we understand that now we can’t access the Internet, since our browser is no longer supported. The operating system ceases to be supported not as fast as it seems to us; in practice, you can safely take a phone with the OS version before last (2-3 years), and maybe even lower, it all depends on your needs. You can always use the old version of the program. Now consider the advantages of new versions of the OS. Manufacturers are successfully trying to push us new applications and new versions of their applications, which we can already install on the old version of the operating system. In new versions of the OS, there are improvements such as a new kernel version, a super-duper of a new video driver, optimization of the work of all parts of the phone a hundred times. But here we put this new version of the OS and see that how my navigator worked, the way it works, the way I read the book, the way I read it, the way I was on the Internet, and I'm sitting. So what has changed for me? That's right, nothing has changed. Consider Japanese philosophy on this subject. In Japan, it is considered "shameful" if you have an old car or phone. But why? Yes, not because you are a sucker and can not afford the iPhone, which you have been saving for half a year, you simply do not need it. The thing is that when you buy new things, you sponsor manufacturers, and thereby improve new developments. In Japan, it really works, but here we mostly make money from scratch, do not follow the advertisement. The best way to avoid advertising trickery is to understand the subject.

Post has been editedmainbord - 04.07.17, 23:11