Tabi Report

7/31/2019 Tabi Report

1/7

Introduction

A tablet computer , or a tablet , is a mobile computer, larger than a mobilephone or personal digital assistant, integrated into a flat touch and primarily

operated by touching the screen rather than using a physical keyboard. It oftenuses an onscreen virtual keyboard, a passive stylus pen, or a digital pen. Theterm may also apply to a variety of form factors that differ in position of thescreen with respect to a keyboard. The standard form of tablet does not have anintegrated keyboard but may be connected to one with a wireless link or a USBport. Convertible notebook computers have an integrated keyboard that can behidden by a swivel joint or slide joint, exposing only the screen for touchoperation. Hybrids have a detachable keyboard so that the touch screen can be

used as a stand-alone tablet. Booklets include dual-touchscreens, and can beused as a notebook by displaying a virtual keyboard in one of them.

REVOLUTION IN MARKET

In 2010, Apple released the iPad, which used the operating system and touchscreen technology similar to that used in their iPhone and became the firstmobile computer tablet to achieve worldwide commercial success. This hassparked a new market for tablet computers and a variety of other manufacturers

have produced versions of their own including Samsung, HTC, Motorola, RIM,Sony, Amazon, HP, Microsoft, and many others. Competing tablets use avariety of operating systems, although the main are iOS(Apple), Android (Google), Windows (Microsoft) and QNX (RIM).

The iPad, is a tablet computer with an emphasis on media consumption, whichbrought the shift in purpose, together with increased usability, battery life,simplicity, lower weight and cost, and overall quality with respect to previoustablets, and was perceived as defining a new class of consumer device whichshaped the commercial market for tablets in the following year.

SYSTEM ARCHITECTURE

Two major computer architectures dominate the tablet market,Intel's x86 and ARM architecture.

Intel's x86, including x86-64 has provided the brains of the IBM compatible PCsince 1981, and Apple's Mac computers since 2006. The CPU's have been
http://en.wikipedia.org/wiki/Mobile_computinghttp://en.wikipedia.org/wiki/Personal_digital_assistanthttp://en.wikipedia.org/wiki/Keyboard_(computing)http://en.wikipedia.org/wiki/Virtual_keyboardhttp://en.wikipedia.org/wiki/Stylus_penhttp://en.wikipedia.org/wiki/Digital_penhttp://en.wikipedia.org/wiki/Computer_form_factorhttp://en.wikipedia.org/wiki/Wirelesshttp://en.wikipedia.org/wiki/USB_porthttp://en.wikipedia.org/wiki/USB_porthttp://en.wikipedia.org/wiki/USB_porthttp://en.wikipedia.org/wiki/USB_porthttp://en.wikipedia.org/wiki/Wirelesshttp://en.wikipedia.org/wiki/Computer_form_factorhttp://en.wikipedia.org/wiki/Digital_penhttp://en.wikipedia.org/wiki/Stylus_penhttp://en.wikipedia.org/wiki/Virtual_keyboardhttp://en.wikipedia.org/wiki/Keyboard_(computing)http://en.wikipedia.org/wiki/Personal_digital_assistanthttp://en.wikipedia.org/wiki/Mobile_computing


2/7

incorporated into a number of tablet PCs over the years and have generallyoffered greater performance along with the ability to run a full versions of Microsoft Windows, along with the associated 25 years of associated Windowsdesktop and enterprise applications on the devices.

Tablet personal computers are mainly based on the x86 IBM-PCarchitecture and are fully functional personal computers employing a slightlymodified personal computer OS (such as Windows or Linux) supporting theirtouch-screen, instead of a traditional display, mouse and keyboard. A typicaltablet personal computer needs to be stylus driven, because operating the typicaldesktop based OS requires a high precision to select GUI widgets, such asa close window button.

In forgoing the x86 precondition (a requisite of Windows compatibility), mosttablet computers released since mid-2010 use a version of an ARMarchitecture processor for longer battery life versus battery weight, heretoforeused in portable equipment such as MP3 players and cell phones. Especiallywith the introduction of the ARM Cortex family, this architecture is nowpowerful enough for tasks such as internet browsing, light production work andgaming.

A significant trait of tablet computers not based on the traditional PCarchitecture is that the main source of 3rd party software for these devices tendsto be through online distribution, rather than more traditional methods of boxedsoftware or direct sales from software vendors. These sources, known as "appstores", provide centralized catalogues of software from both 1st and 3rdparties, and allow simple "one click" on-device software purchasing,installation, and updates.

Touch user interface

A key and common component among tablet computers is touch input. Thisallows the user to navigate easily and intuitively and type with a virtualkeyboard on the screen.

The event processing of the operating system must respond to touches ratherthan clicks of a keyboard or mouse, which allows integrated hand-eyeoperation. Although the device implementation differs from more traditional

PCs or laptops, tablets are disrupting the current vendor sales by weakeningtraditional laptop PC sales in favour of the current tablet computers.


3/7

Touchscreen hardware

Touchscreens are usually one of two forms;

Resistive touchscreens are passive and can respond to any kind of pressure

on the screen. They allow a high level of precision, useful in emulatinga pointer as is common in tablet computers) but may require calibration tobe accurate. Because of the high resolution of detection, a stylus orfingernail is often used for resistive screens. Limited possibilities exist forimplementing multi-touch on a resistive touch-screen. As modern tabletcomputers tend to heavy use of multi-touch, this technology has faded out onhigh-end devices where it has been replaced by capacitive touchscreens.

Capacitive touchscreens tend to be less accurate, but more responsive thanresistive screens. Because they require a conductive material, such as afinger tip, for input, they are not common among (stylus using) Tablet PCsbut are more prominent on the smaller scale "tablet computer" devices forease of use, which generally do not use a stylus, and need multi-touchcapabilities.
http://en.wikipedia.org/wiki/Accuracy_and_precisionhttp://en.wikipedia.org/wiki/Pointer_(computing_WIMP)http://en.wikipedia.org/wiki/Pointer_(computing_WIMP)http://en.wikipedia.org/wiki/Accuracy_and_precision


4/7

OTHER FEATURES

Accelerometer: A device that detects the physical movements of the tablet.This allows greater flexibility of use since tablets do not necessarily have afixed direction of use. The accelerometer can detect the orientation of thetablet relative to the horizontal plane, and movement of the tablet, both of

which can be used as an alternative control interface for a tablet's software. Ambient light and proximity sensors are additional "senses", that can

provide controlling input for the tablet. Storage drive: Large tablets use storage drives similar to laptops, while

smaller ones tend to use drives similar to MP3 players or have on-boardflash memory. They also often have ports for removable storage suchas Secure Digital cards. Due to the nature of the use of tablets, solid-statememory is often preferable due to its better resistance to damage duringmovement.

Wireless: Because tablets by design are mobile computers, wirelessconnections are less restrictive to motion than wired connections. Wi-Fi connectivity has become ubiquitous among tablets. Bluetooth iscommonly used for connecting peripherals and communicating with localdevices in place of a wired USB connection.

3D: Following mobile phone, there is also 3D slate tablet with dual lens atthe back of the tablet and also provided with blue-red glasses.

Docking station: Some newer tablets are offering an optional docking stationthat has a full size qwerty keyboard and USB port, providing both portability

and flexibility.


5/7

Comparison

The advantages and disadvantages of tablet computers are highly subjectivemeasures. What appeals to one user may be exactly what disappoints another.The following are commonly cited opinions of tablet computers versus laptops:

Advantages

Usage in environments not conducive to a keyboard and mouse such as lyingin bed, standing, or handling with a single hand.

Lighter weight, lower power models can function similarly to dedicated E-book readers like the Amazon Kindle.

Touch environment makes navigation easier than conventional use of keyboard and mouse or touch pad in certain contexts such as imagemanipulation, musical, or mouse oriented games.

Digital painting and image editing are more precise and intuitive thanpainting or sketching with a mouse.

The ability for easier or faster entry of diagrams, mathematical notations,and symbols.

Allows, with the proper software, universal input, independent fromdifferent keyboard localizations.

Some users find it more direct and pleasant to use a stylus, pen or finger topoint and tap on objects, rather than use a mouse or touchpad, which are notdirectly connected to the pointer on screen.

Tablets typically have longer battery life than laptops or netbooks. The virtual keyboard is lit, thus more suitable to dark places.

Disadvantages

Slower input speed handwriting or typing on a virtual keyboard can besignificantly slower than typing speed on a conventional keyboard whichcan be as high as 50 150WPM; however, Slideit, Swype and othertechnologies are offered in an effort to narrow the gap. Some devices also

support external keyboards (e.g.: Most tablets can acceptBluetooth keyboards, and USB keyboards through Dock Connector-to-USBadapter.)

Less user-friendly ergonomics a tablet computer, or a folded slate PC, doesnot provide room for a wrist rest, and the user's arm must move constantlywhile writing.

Tablets lack some conventional user aids, such as hoverboxes. Higher screen risk Tablet computers are handled more than conventional

laptops, yet many are built on similar frames; in addition, since their screens

also serve as input devices, they run a higher risk of screen damage fromimpacts and misuse.


6/7


7/7

abundant applications will require high technology and strong integration abilityof industrial chain, which couldnt be imitated effortlessly by others.

Documents

Tabi Report