Saturday, December 31, 2011

The display here, where the display, the display where I look (scientific box) -

display area of ​​mobile phones – displays are becoming increasingly important when choosing a new device forms an important criterion. Nowadays, quickly evolving technology, there are a large number of types of displays, which is not hard to lose. In this part of the scientific section of our window we will introduce the most commonly used types, principles on which they work. Bring your equipment where you can meet with them.

Times monochrome monochrome screens have been for some time for us and rule the world, color display with thousands to millions of colors. Displays with different technologies, there are many, and when selecting a new phone, which can move up to whom sight. The following lines of the windows of our research should help you not only make sense, but also understand the basic principles on which they work most commonly used screens.

The first mobile phone with color display is considered that the Siemens S10 in 1998. He managed to see 4 colors – red, green, blue and white

fineness of the screen

basic parameter, applicable to all technologies equally, the softness display, often known as a raster display. The fineness of the grid is given in DPI (Dots Per Inch), or dots per inch. Practically therefore expresses the number of points that fits on the length of one inch (2.54 cm). The DPI value is greater, the finer the display. Most phones today at DPI value ranges from 140 to 300 +.

density of 300 dots per inch no human eye can no longer perceive the individual pixels. The first phone with such a fine display was the Sony Ericsson Xperia X1 with gentleness 311 DPI. To name of the current models such as Samsung Galaxy Nexus Nokia E6, or line of iPhones from 4 generation. Especially Apple, then your display with the density of pixels called the retina (retina).


Most of the displays used today fall into the family of the LCD. LCD Abbreviation terminology expresses Liquid Crystal Display. The technology is based on the electromagnetic properties of liquid crystals. Basic LCD division is active (TFT) and passive (STN) technology. Nowadays practically only used TFT for its better display capabilities.


displays used for each of the separate transistor pixels, which ensures the activation of a pixel – a pixel. Every single pixel of the LCD consists of liquid crystal molecules suspended between two transparent electrodes and two polarizing filters. With the voltage on the electrode position is determined molecular crystals through which light passes through polarizing filters zpolarizované. The intensity of transmitted light is then regulated by the position of molecular crystals.

It follows that the LCD must be present at a constant source of light, even when displaying black. To obtain light using cathode-ray tube emitting white light. White light is used due to containment of all wavelengths of the color spectrum. The light is then decomposed into three primary colors – red, green, blue (Red, Green, Blue – RGB). The various states of molecular crystals can be controlled for each color of light transmission and therefore the intensity of color. The color of a pixel is divided into the so-called sub-pixels. Using the additive mixing these three colors then reaches hundreds or thousands of different colors. Each part is defined by thin glass panels.

Scheme of the active pixel LCD

For products

upper classes are increasingly encounter IPS display. He also falls into the family of the LCD, but offers a more realistic color reproduction and wider viewing angles. Contrast, however, is not just the highest and the administration of black is not as perfect as the OLED displays. Currently offered with IPS screen phones as the Nokia 603 and 701, iPhone 4 and higher generation, or the LG Optimus Black. He also carries the IPS panel with designation Nova . This is a special technology from LG, which brings brightness to 700 thread (thread – the basic unit of luminous brightness). This greatly improves readability in direct sunlight.

first Nova device with IPS panel – LG Optimus Black

newer generation LCD called Super LCD, or even S-LCD . It also offers the truer color rendition and a higher viewing angles up to 5 times less energy efficiency than previous generation LCD. This type of panel display offers above almost all HTC phones, its higher ranks and also the model Google Nexus P.


Like LCD, OLED pixels are also divided into different sub-pixels. Unlike the LCD does not need any internal source of light. The basic principle of OLED technology is the location of the organic material between two electrodes – an anode and cathode. Applying a DC voltage by means of electrodes into the organic material can be retrieved subpixel positive and negative charges. These charges are then connected in the radiating layer, and there is light radiation. The radiation intensity of each sub-pixel (red, green, blue) can comprise a variety of colors.


subpixelům voltage is conducted using a special conductive layer. A very layman’s terms – after the voltage to the subpixel subpixel will shine, just like an ordinary LED. It follows that when displaying black pixels will simply shut down. This is fundamentally different from TFT LCD technology. This results not only show a much truer blacks, but also a significant energy savings. Another interesting feature is the possibility of flexible production and flexible displays. With that in mind as far Samsung and Nokia, have already presented their concepts.

TIP: Look at the functional concept device from Nokia with a flexible display.

Nevýhodou these panels is a shorter life, visible grid displeje i hodnotě at high DPI and higher production costs. Even on this issue, but no longer works and is in the development of new types of nuts, which provide fine grid and the pixel density of around 300 DPI.

scheme OLED pixel

OLED active matrix display called AMOLED . Active matrix is ​​the pair of transistors for each pixel separately. This increases the current flow and reduces the response time. Compared with a passive matrix display (PMOLED) has AMOLED display higher frequency, sharper image, and lower power consumption. The disadvantage is more complex structures and the associated higher price. One AMOLED pixel is composed of 8 sub-pixels. With this display, we find in phones such as the Dell Venue Pro, HTC Legend, Samsung Galaxy, Nokia C7-00, Nokia 700, or Nexus One. They are equipped with it also the first series of HTC Desire.

Improved versions of the so-called Super AMOLED . This version combines the display and the touch of a single layer. Compared with conventional AMOLED stands out brighter colors, better readability in sunlight, better viewing angles and energy savings. It can be found exclusively in the higher ranks of the Samsung model. Namely Galaxy, the Nexus S, Omnia 7 or such S8500 Wave.

OLED displays have been criticized for generally coarser grid and the high value of DPI. This malady largely removes Super AMOLED Plus . For it is used a new type of matrix called Real Stripe. This one uses just 12 pixel sub-pixels, thereby providing a really fine display. Devices with this display are now only two – Samsung Galaxy S II and Samsung Droid Charge.

TIP: Do not miss our review Samsung Galaxy II.

Direct comparison of pixel AMOLED AMOLED and Super Plus

LG in August 2011 launched its own bar built on the principle of OLED – Ultra called AMOLED. Unfortunately for him but not much specific information. The actual manufacturer claims that the display behaves better in direct sunlight than a typical AMOLED. This is apparently due to its double reflection of external light. It is not clear whether the polarizing filters, like ClearBlack displays from Nokia, or whether the contact area is located directly on the display, like the Super AMOLED from Samsung. So far the only phone with this display panel is LG Optimus Sol.

LG Optimus Sol – the first and only representative of Ultra AMOLED

interesting technology, developed in 2010, the Finnish company Nokia is called ClearBlack display (CBD), based on AMOLED panel. CBD is characterized by adding another layer between the screen and touch part. This layer reduces the release of external light, so that nedopadá the display part. This is achieved much better visibility, such as under direct sunlight. At the same time also significantly improves the contrast ratio. This kind of display can be found naturally only in models of the Finnish manufacturer – for example, Lumia 800, N9, N8, C6-01 and E7-00.


As in all directions in the field of display technology progresses by leaps and bounds forward and will be interesting to see what direction it will take further. To this list were included kinds of displays, which are nowadays in mobile devices often encounter. I firmly believe that today’s science window you brought a little light into the world of display panels.

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Best android swept the competition. Review of Galaxy Nexus -

already twice had the honor to make the Samsung literally flagship operating system, Android, and neither time did not fail. In addition to the giant screen with almost incredible resolution of 720p (1280 x 720 pixels) had endowed with a dual core processor at 1.2 GHz and 1GB RAM. In addition, you can look forward to supporting technologies such as NFC, wi-fi or direct a brand new operating system in version 4.0. He detail we have dismantled this article closer to him in a review will take.

relatively strong even above-average battery life and a fast camera that has virtually no delay between shots. The main disadvantage, while the advantages of this model is just a giant screen, a very difficult one-handed operation. Most of the p opulation will be doomed to constant ručkování and reaching round. But it is a tax on otherwise great visual experience.

Design and construction – twin twos

similarity with the model of the Galaxy SII is definitely not purely random, and both devices have similarly shaped body. At the bottom is typical stump, which then quickly narrows to a chief part. The whole body model Galaxy Nexus is slightly bent, but this time not so much as its predecessor.

Pros and cons

Why buy?

  • agility equipment
  • giant screen with HD
  • Android 4.0
  • perfect workmanship
  • two core processor
  • relatively good battery life

Why not to buy?

    worse one-handed
  • only slightly above average camera

When: on sale

For what? 14 800 CZK with VAT

praise rubberized back cover that is at least a partial safeguard against slipping out of hand. The quality of processing other parts of the phone is obviously excellent. Breaking display button is located on other phones like Samsung, on the right side.

Capitol itself for itself are the dimensions of the apparatus (136 × 68 × 9 mm) and the related display of 4.65 inches diagonal. Prepare and reaching round to the already mentioned and uncertainty, when you operate the phone with one hand while walking for example. However, there is a relatively high probability that you get used to this property, you will train a series of new grifo or simply need to use your other hand. However, keep this fact in the purchase of any real note.

You’ll get used musez, as traditionally, spotted on the front of the device. On the contrary, we welcome back this time three-color signal diode, which is hidden at the bottom. The lamp time is much larger than usual, but a littl e less clear. Three round knob on the side are intended for connection to a docking station.

Due to the size of the device is actually a decent weight: only 135 grams. In vain would you seek any body of the device hardware buttons except the volume control and turn on the display. The traditional three or four buttons caters to the lower bar on the display, where the keys are always displayed. An exception is the video playback and games. To cover this bar must be created directly from the developer support the application.

Operating System – groundbreaking version

Galaxy Nexus drives 1.2 GHz processor OMAP platform based on ARM Cortex-A9 GPU PowerVR SGX540. Although some might expect Tegra or Snapdragon latest, we can assure you that the whole system is pretty fast and in normal browsing menus, work with a web browser, or gaming. It speed is one of the main slogans of the new operating system. You do not have to worry about loss of power, compared for example with HTC Sensation XE with 1.5 GHz processor or other high-end phones last year.

Android 4.0 brings a number of changes in control and in many ways it makes it easier (more on that in separate article). Very interesting to see how the manufacturers will build the hardware launch buttons. We had the honor to watch retreat optical trackball or joystick, which after all occupy too much space.

At the present time would not be a significant problem even with the backward compatibility of applications. Although the programs are modified to a partial change in operating phi losophy and the disappearance of traditional ikonového menu at the bottom of the screen, their functionality, however, should remain the same. The problem can be rather different game.

display and battery life – surprising holder

Can you guarantee that you will melt the quality of the display that has a resolution of 1280 x 720 pixels and uses Super AMOLED technology. In addition, the new Android 4.0 is used a new font, which is even rounder, so the difference is noticeable. Perfect color and is above average readability in direct sunlight. We commend the sensitivity of the touch layer and move, for example, function keys in the touch screen did not bother us at all.

It is interesting to compare the softness display ppi (pixels per inch) with major competitors. Samsung Galaxy SII has a density of 218 ppi, 233 ppi Nexus S, Samsung Galaxy Note 285 ppi, but rather the iPhone 4 with 326 ppi Galaxy plays the Nexus, which boasts 316 ppi. iPhone 4, however, has more than an inch smaller screen.

Due to screen size, high resolution and dual-core processor is almost a surprise that the phone during our testing lingered one and a half or nearly two days of operation. As always, it depends on how you use and how often you use the GPS data transfer or synchronize a variety of applications.

Function – blitz camera

From the functional model of equipment missing Galaxy Nexus practically nothing. You can enjoy data transfers HSPA, Wi-Fi even in the 5GHz band, wi-fi direct, NFC and even barometer. It is used for determining your position quickly and may appear even though applications using its services, it is questionable how much they are accurate.

Internal memory is 16 or 32 gigabytes depending on the version sold equipment. Note that memory is not directly accessible via the USB Mass Storage but over the MTP, which is part of the Windows operating system. Method of use is virtually identical. This is because it is not possible to have simultaneously connected to the computer and memory in the phone mode, which allows the USB Mass Storage.

At a very good camera is also a 5 Mpix resolution, automatic (continuous) autofocus přisvětlovací diode. Picture quality is just above average in this respect the Galaxy Nexus hole in the world does. A few better performers are simply found. In good lighting conditions, everything is fine, but otherwise it begins to show noticeable noise. It should be noted, however, the delay between images is virtually zero. Video can be recorded at resolutions up to 1080p.

Competition – waiting for spring

As it happens own model for Google, the competition is always one step behind and a few months certainly will. At the beginning of the year could have endowed many Android 4.0 phones like the HTC Sensation or Galaxy SII, which would then become at least partially equivalent competitors today recenzovanému device. None of them offers such a monstrous LCD just like the Galaxy Nexus.

On the right competitors, we will have to wait a few months and hopefully (as always) will try to beat the Google model. And whether in terms of equipment or functional user interface, such as offering HTC Sense. With any luck, the future awaits us so very swift full HD displays and equipment packed into a great cover.

  • LG Optimus 2X

    Smartphone LG Optimus One 2x dual-core processor is the perfect multimedia companion, which proves čtyřpalcový WVGA display, under which the touch panel on the traditional set of system buttons or osmimegapixelový built-in camera.

    * Sleva0 *

    Price: 10 990 CZK

  • HTC Sensation
    HTC Sensation boasts a dual-core Snapdragon processor and a giant screen with high resolution. Besides offering a great processing osmimegapixelový camera with autofocus and GPS navigation.

    * Sleva0 *

    Price: 11 490 CZK

  • Samsung Galaxy S II

    Samsung Galaxy S II is the thinnest and one of the most powerful smartphone ever. Body of the phone is only 8.49 mm thin. The biggest improvements are a new dual-core processor and display. He has a diagonal 4.3 inches and uses AMOLED technology Super Plus.

    * Sleva0 *

    Price: 13 990 CZK


READ MORE - Best android swept the competition. Review of Galaxy Nexus -

The collection of jokes on New Year's Eve Apple & iPhone -

31st December 2011 – 15:44 · Premysl Steidl


Satire is one of the signs of success. Apple is currently very successful, and it means a lot of jokes headed in his direction. For today’s happy day we have them collected for you some. know more? Insert a link to the discussion. To continue in the same spirit? Try our older article “14 best jokes Apple iPad” .

What actually originated iPhone 4S? (Source:

main topic was the premiere of iPhone 4S, which was a sensation, as many expected. A lot of fun, we enjoyed the voice of Apple’s assistant Siri, her výplodům we spent several separate articles …

And by the way – you know how Apple managed to conceal the new iPhone 4S to the very beginning of the press conference? It did not, but nobody noticed that roam the world hundreds of prototypes …

Schedule an appointment with me Dilbert and Alice on the tenth.
nothing, the phone has the care of it. Embarrassing. (Source:

the new head of Apple’s Tim Cook was preparing for the premiere of iPhone 4S? Where do you prepare your speech at the press conference? Where it found a good acoustics and enough privacy?


to avoid the creation or Steve Jobs, even though he died in the fall. Jokes that are appropriate and less appropriate, funny and sharp. We will keep a decent memorial lines and show you two illustrations that pay tribute to Steve’s work. Where can you have the iPad?

Source: NewYorker. com

Prohibited advertising

know that traditional promotional videos that follow the premiere of every major Apple product? Sophisticated commentary, demonstration and admiration for marketers around the world. What happens when you release in this format parodisté?

We’re here today talking about the signs of success. Is it the price of products and not all of it has to be happy … (source:


pieces at the end

READ MORE - The collection of jokes on New Year's Eve Apple & iPhone -

"Siri for Android" in the Android Market last long - LUPA

Siri for Android attracted thousands of credulous users, probably believers that Siri was ported from iPhone to Android environment. Actually this was somewhat fraudulent application will not find Google threw it out – in the Market appeared in the middle.

even a little surprised that the author of this application uses the name “Official App” so little, it is sufficient to increase the “confidence” in the offered products. One other such example was the “official” Pinterest applications (Google it also deleted).

developer named “Official App” of course “Siri” Android neportoval, it was only a trigger to launch “Google Voice Action” and the description of the application it was stated. Probably not so it was not a malicious application, as in many other examples. Android Market provides commonly pirated copies of popular applications for Android with “added value” in the form of malware.

Source: “Official” Siri app hits the Android Market, Google’s marketplace highlights issues

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Application of the Week: Grand Theft Auto 3 is heading to mobile phones and tablets - Aktuálně.cz

infamous game series Grand Theft Auto (abbreviated as GTA), although currently looking its fifth sequel, developer Rockstar Games studio but in the meantime, idle and prepared a work release older GTA 3 on Android and Apple iOS.

will be compatible with both the tablet and with selected smartphones. Complete support to ensure just Apple and a number of famous game violence can run on your iPad 2, iPhone 4 and iPhone 4S.

will be available for the price of three pounds, the equivalent of just over ninety crowns.

GTA 3 in 2001, became a best-selling video game and garnered quite a positive review. Average rating website Metacritic, which gathers reviews of important global media outlets, reaching an impressive 93 percent.

READ MORE - Application of the Week: Grand Theft Auto 3 is heading to mobile phones and tablets - Aktuálně.cz

iPad saved Christmas thanks to Find My iPhone -

apple-ipad-2 The story behind that would have embarrassed many a writer has written himself a life on-screen iPad. Not everyone celebrates Christmas as we used to, try some of these during the holidays to get the foreign assets of more nerozbalených gifts. In American California around half past four in the morning crept into the house of one family thief who stole two LCD televisions, laptop, and about forty Christmas gifts, the family still missed even unpack.

Children, however, had as one of the monitors also get gifts, but the previous owner has already activated the day and especially to protect their children activated the Find My iPhone feature. With this feature, and cooperation with the California police managed to catch a thief just a few houses away and get back all the stolen things. The thief had also with him other things also from the robbery and served as a Christmas in jail with bail $ 50 000.

* Source:

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Friday, December 30, 2011

Apple is preparing for iOS own Face Detection -

If you watch mobile scene for the last few months, you know that the human face recognition technology used by Google ago, in their latest version of Android Ice Cream Sandwich. Specifically, it now uses only Samgung Galaxy Nexus to unlock the screen, but will gradually be present on all devices with this operating system and WebCam front. Before rage with Apple’s next farce, we noted that the technology registered long before Android was introduced competitive. Specifically, the patent first appeared June 29, 2010, but escaped to the public until now.

Apple patent
iPhone 4S

Apple patent points out that its technology used in some other areas and, more importantly, it offers considerably more advanced version. According to the manufacturer’s competitive Google features quite aggressive on the battery as well as unsecured. Besides being very CPU, still can be fooled ordinary photographs of the person, which then unlocks the phone without problems. It was alleged that several users, to which Google responded by saying that it is only a few secure version of unlocking the phone, not a hundred percent guaranteed.

offshoot Apple has not only very easy but also available for smartphones, tablets and laptops. What exactly has the technology to offer and what is different from the competition, the patent is not clear. The company mentioned but can capture different segments of the skin and face, fully authorized the application to individual users, who can then submit their own profile on the phone, open the desired function or just a classic unlock screen.

TIP Read more about the facial recognition system Android.

We must not forget that Apple already uses the Face Detection feature in its latest iPhone 4S, which helps the camera recognizes up to 10 faces at once. Whether or introduce something new to the field of facial recognition, it still must find out.


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