Hardware

Screen and input

The iPad's touchscreen display is a 25 cm (9.7 in) liquid crystal display (1024 × 768 pixels) with fingerprint–resistant and scratch-resistant glass. Like the iPhone, the iPad is designed to be controlled by bare fingers; normal gloves and styli that prevent electrical conductivity may not be used, although there are special gloves and styli designed for this use.

The display responds to two other sensors: an ambient light sensor to adjust screen brightness and a 3-axis accelerometer to sense iPad orientation and switch between portrait and landscape modes. Unlike the iPhone and iPod touch built-in applications, which work in three orientations (portrait, landscape-left and landscape-right), the iPad built-in applications support screen rotation in all four orientations (the three aforementioned ones along with upside-down), meaning that the device has no intrinsic "native" orientation; only the position of the home button changes.

The iPad has a switch to lock out this screen rotation function (reportedly to prevent unintended rotation when the user is lying down).There are a total of four physical switches, including a home button below the display that returns the user to the main menu, and three plastic physical switches on the sides: wake/sleep and volume up/down, along with the screen rotation lock.

Connectivity

Steve Jobs, Apple CEO, introducing the iPad

The iPad can use Wi-Fi network trilateration from Skyhook Wireless to provide location information to applications such as Google Maps. The3G model contains A-GPS to allow its position to be calculated with GPS or its position relative to nearby cellphone towers; both models have a digital compass. To improve 3G radio sensitivity the back of the Wi-Fi and 3G model has a black plastic accent on top. In contrast the back of the Wi-Fi model iPad is only contoured aluminum with black plastic buttons. The iPad only has a dock connector for wired connectivity and has no ethernet networking or USB ports.

Audio and output

Back of the iPad Wi-Fi

Dual speakers housed inside the iPad provide mono sound via two small sealed channels in the interior speaker assembly. These direct the sound outwards toward the three audio ports carved into the bottom-right of the unit. The microphone is within the device. A volume switch is on the right side of the unit, and a 3.5 mm TRS connector audio-out jack provides stereo sound for headphones on the top-left corner of the device. The iPad supports normal headphones and models with microphones, volume controls, or both. Microphones can be used for voice recording.

The built-in Bluetooth 2.1 + EDR interface allows wireless headphones and keyboards to be used with the iPad. However, the iOS does not currently support thefile transfer via Bluetooth. The iPad also has video output so that it can use an external display or television. This is over a VGA connection at a resolution of 1024 x 768.^[40]

[edit]Power and battery

iPad in the iPad Keyboard Dock

The iPad uses an internal rechargeable lithium-ion polymer battery. The batteries are made in Taiwan by Simplo Technology, which makes 60% of them, and Dynapack International Technology. The iPad is designed to be charged with a high current (2 amperes) using the included USB 10 W power adapter. While it can be charged by a standard USB port from a computer, these typically provide lower current (500 milliamperes or 1 ampere). As a result, if the iPad is turned on while being charged with a normal USB computer port, it will charge much more slowly, if at all.

Apple claims that the iPad's battery can provide up to 10 hours of video, 140 hours of audio playback, or one month on standby. The battery loses capacity over time and is not designed to be user-replaceable. As in the battery-replacement program for iPod and the original iPhone, Apple will replace an iPad that does not hold an electrical charge with a refurbished iPad for a fee of US$99.

Storage and SIM

The iPad was released with three options for internal storage size: a 16, 32, or 64 GB flash drive. All data are stored on the flash drive and there is no option to expand storage. Apple sells a camera connection kit with an SD card reader, but it can only be used to transfer photos and videos.

The side of the Wi-Fi + 3G model has a micro-SIM slot (not mini-SIM). Unlike the iPhone, which is usually sold locked to specific carriers, the3G iPad is sold unlocked and can be used with any compatible GSM carrier. In the U.S., data network access via T-Mobile's network is limited to slower EDGE cellular speeds because T-Mobile's 3G Network uses different frequencies.

Optional accessories

Apple offers several iPad accessories, including:

• iPad Keyboard Dock with hardware keyboard, 30-pin connector, and audio jack
• iPad Case which can be used to stand the iPad in various positions
• iPad Dock with 30-pin connector and audio jack
• iPad Dock Connector to VGA Adapter for external monitor or projector
• iPad Camera Connection Kit including a USB Type A connector adapter and an SD card reader, for transferring photos and videos
• iPad 10W USB Power Adapter with 2 A output (10 W)

Manufacture

The iPad is assembled by Foxconn, which also manufactures Apple's iPod, iPhone and Mac Mini, in its largest plant in Shenzhen, China.

iSuppli estimated that each iPad 16 GB Wi-Fi version costs Apple US$259.60 to manufacture, a total that excludes research, development, licensing and patent costs. Apple does not disclose the makers of iPad components, but teardown reports and analysis from industry insiders indicate that various parts and their suppliers include:

• Apple A4 SoC: Samsung
• NAND flash RAM chips: Toshiba for all models except the 64 GB iPad, whose memory was made by Samsung^[53][54]
• Touch-screen chips: Broadcom
• Touch panels: Wintek, after TPK Touch Solutions was unable to fulfill its orders, delaying the iPad's release from late March to early April.
• Case: Catcher Technologies
• LCD drivers: Novatek Microelectronics
• Batteries: made in Taiwan by Simplo Technology, which makes 60% of them, and Dynapack International Technology makes the other 40%.
• accelerometer: by STMicroelectronics 

Software

Like the iPhone, with which it shares a development environment (iPhone SDK, or software development kit, version 3.2 onwards), the iPad only runs its own software, software downloaded from Apple's App Store, and software written by developers who have paid for a developer's license on registered devices. The iPad runs almost all third-party iPhone applications, displaying them at iPhone size or enlarging them to fill the iPad's screen. Developers may also create or modify apps to take advantage of the iPad's features.Application developers use iPhone SDK for developing applications for iPad. The iPad ships with an improved version of iPhone OS v3.2, and is to get iOS 4 by fall 2010.

Applications

The iPad comes with several applications, including Safari, Mail, Photos, Video, YouTube, iPod, iTunes, App Store, iBooks, Maps, Notes, Calendar, Contacts, and Spotlight Search. Several are improved versions of applications developed for the iPhone.

The iPad syncs with iTunes on a Mac or Windows PC. Apple ported its iWork suite from the Mac to the iPad, deleting several features in the process, and sells the Pages, Numbers, and Keynote apps in the App Store. Although the iPad is not designed to replace a mobile phone, a user can pair it with a Bluetooth headset and place phone calls over Wi-Fi or 3G using a VoIP application.

Digital rights management

For more details on on the digital rights controversy, see iOS.

The iPads design imposes strict restrictions in its usage namely DRM intended to lock purchased video content to Apple's platform, the development model requiring a non-disclosure agreement and paid subscription to develop for the iPad, and the centralized approval process for apps as well as Apple's general control and lockdown of the platform itself, and that such centralized control could stifle software innovation. Of particular concern is the ability for Apple to remotely disable or delete apps, media, or data on the iPad at will.

Digital rights advocates, including the Free Software Foundation, Electronic Frontier Foundation, and computer engineer and activist Brewster Kahle, have criticized the iPad for its digital rights restrictions. Paul Sweeting, an analyst with GigaOM, is quoted by National Public Radio saying, "With the iPad, you have the anti-Internet in your hands. [...] It offers [the major media companies] the opportunity to essentially re-create the old business model, wherein they are pushing content to you on their terms rather than you going out and finding content, or a search engine discovering content for you." But Sweeting also thinks Apple's limitations make its products feel like living in a safe neighborhood, saying, "Apple is offering you a gated community where there's a guard at the gate, and there's probably maid service, too." Laura Sydell, the article's author, concludes, "As more consumers have fears about security on the Internet, viruses and malware, they may be happy to opt for Apple's gated community."

Jailbreaking

For more details on on iPad Jailbreaking, see Jailbreaking for iOS.

Like other iOS Devices, the iPad can be "jailbroken", allowing code that is not authorized by Apple to be able to run on the device. Once jailbroken, iPad users are able to download many applications previously unavailable through the App Store via unofficial installers such as Cydia, as well as illegally pirated apps. Jailbreaking voids Apple's warranty on the device.

Book and magazine content

Reading a book on the iPad

Further information: iBookstore

The iPad has an optional iBooks application that can be downloaded from the App Store, which displays books and other ePub-format content downloaded from the iBookstore. For the iPad launch on April 3, 2010, the iBookstore is available only in the United States. Several major book publishers including Penguin Books, HarperCollins, Simon & Schuster and Macmillan have committed to publishing books for the iPad.

In February 2010, Condé Nast Publications said they would sell iPad subscriptions for their GQ, Vanity Fair and Wired magazines by June. In April 2010, The New York Times announced it will begin publishing daily on the iPad.

Censorship

Further information: Apple App Store censorship

Apple's App Store, which provides iPhone and iPad applications, imposes censorship of content, which has become an issue for book publishers and magazines seeking to use the platform. The Guardian described the role of Apple as analogous to that of the distributor WH Smith, a main distributor which for many years imposed content restrictions on British publishers.

Reception

Reaction to the announcement

Media reaction to the iPad announcement was mixed. Walt Mossberg wrote, "It's about the software, stupid", meaning hardware features and build are less important to the iPad's success than software and user interface, his first impressions of which were largely positive. Mossberg also called the price "modest" for a device of its capabilities, and praised the ten-hour battery life. Others, including PC Advisor and The Sydney Morning Herald, wrote that the iPad would also compete with proliferating netbooks, most of which use Microsoft Windows. The base model's $499 price was lower than pre-release estimates by the tech press, Wall Street analysts, and Apple's competitors, all of whom were expecting a much higher entry price point.

Yair Reiner said the iPad will compete against e-book devices such as the Barnes & Noble nook and the Amazon Kindle while offering 70 percent of revenue to publishers, the same arrangement afforded developers on the Apple App Store.^[84] Notably, a week before the iPad's expected release, the Amazon Kindle store increased publishers' revenue share to 70 percent as well.

Several days after the unveiling, Stephen Fry said people must use the iPad to truly appreciate its purpose and quality and commented that common criticisms of the device fall away after use. Fry noted the iPad's speed and responsiveness, the intuitive interface and the richness and detail of the display. Along with Steve Jobs' statements in the announcement members of the media also said that it established a new class of devices between smartphones and laptops.

Forrester Research has argued that the iPad should be considered a form of personal computer in spite of Apple's restrictions on creating and editing files with the iPad.

Omitted features

CNET and Gizmodo listed features that are missing from the iPad that they believe customers expect, including a camera for video chat, Adobe Flash support, a longer and narrower "widescreen" aspect ratio suitable for watching widescreen movies, and the ability to multitask (run more than one application at once), a USB port, HDMI output, and a more flexible wired-data port than the iPod dock connector. According to Apple's iOS 4 unveiling and demonstration on April 8, 2010, as well as the Keynote presentation available on their website, multitasking will be available to all iPad users with a software update in the fall of 2010. The Seattle Post-Intelligencer and Gizmodo noted that the iPad will only officially support installing software from the App Store. CNET also criticised the iPad for its apparent lack of wireless sync which other portable devices such as Microsoft's Zune have had for a number of years. The built-in iTunes app should be able to download from the Internet as well.

CNN and Wired News defended Apple's omission of a number of features, including support for Adobe Flash, noting that YouTube and Vimeo have switched to H.264 for video streaming. They also said that "[multitasking] will not matter at all to the target user", as its absence is responsible for "a large part of [the iPad's] ten-hour battery life." Multitasking will be added in the next iPad software update. Of the aspect ratio: "16:9 ratio in [portrait mode] would look oddly tall and skinny ... [4:3 is] a compromise, and a good one." Of the lack of a USB port: "The iPad is meant to be an easy-to-use appliance, not an all-purpose computer. A USB port would mean installing drivers for printers, scanners and anything else you might hook up."

Product name

Like the iPhone, the iPad shares its name with existing products. The most publicized is the Fujitsu iPAD, a mobile multi-functional device sold to retailers to help clerks verify prices, check inventory, and close sales. The Japanese company Fujitsu introduced the iPAD in 2002, and the following year applied for the trademark, but the firm found the mark was already owned by Mag-Tek. Fujitsu's trademark application was listed as "abandoned" in April 2009, and the ownership of the mark is unclear. Fujitsu consulted attorneys over what, if any, action it might take. On March 17, 2010 the Fujitsu iPAD U.S. trademark was transferred to Apple.

In the first days after the iPad's announcement, some media and many online commenters criticized the name "iPad", noting its similarity to "pad", the common name for a sanitary napkin. Shortly after the launch announcement, the hashtag "iTampon" became the number-two trending topic on the social networking site Twitter.

Reviews

The initial reaction to the iPad's announcement was mixed, but upon its actual release reviewers who spent more time with the device delivered generally favorable reviews. Walt Mossberg of The Wall Street Journal called it a "pretty close" laptop killer. David Pogue of The New York Times wrote a "dual" review, one part for technology-minded people, and the other part for non-technology-minded people. In the former section, he notes that a laptop offers more features for a cheaper price than the iPad. In his review for the latter audience, however, he claims that if his readers like the concept of the device and can understand what its intended uses are, then they will enjoy using the device. Ed Baig of USA Todaybluntly states that the iPad "is a winner". Andy Ihnatko of the Chicago Sun-Times calls the iPad "one of the best computers ever". PC Magazine's Tim Gideon wrote, "you have yourself a winner" that "will undoubtedly be a driving force in shaping the emerging tablet landscape." Michael Arrington of TechCrunch said, "the iPad beats even my most optimistic expectations. This is a new category of device. But it also will replace laptops for many people."

PC World criticized the iPad's slim file-sharing and printing abilities, and Ars Technica said sharing files with a computer is "without a doubt one of our least favorite parts of the iPad experience."

Reaction to the international launch

On May 28, 2010 the iPad was released in Australia, Canada, Japan as well as several larger European countries. Media reaction to the launch was mixed. The media noted the positive response from fans for the device with thousands of people queued on the first day of sale in a number of these countries. The media also praised the quantity of applications, as well as the bookstore and other media applications. In constrast they criticized the iPad for being a closed system and mentioned that the iPad faces competition from Androidbased tablets. With regards to its books application The Independent criticised the iPad for not being as readable in bright light as paper. However they also praised the device for being able to store a large number of different books.

Spesification :

Developer	Apple Inc.
Manufacturer	Foxconn (on contract)[1]
Type	Tablet media player/PC
Release date	Wi-Fi model (U.S.):April 3, 2010[2][3] Wi-Fi + 3G Model (U.S.):April 30, 2010[4][5] Both Models (Nine more countries): May 28, 2010[6]
Units sold	2 million (as of June 1, 2010)[7]
Operating system	Apple iPhone OS 3.2 (build 7B367)[8] Released April 3, 2010; 2 months ago
Power	Internal rechargeable non-removable 25 W·h (90 kJ) lithium-polymer battery[9]
CPU	1 GHz Apple A4[9][10] PowerVR SGX 535 GPU[11]
Storage capacity	Flash memory 16GB, 32GB, or 64GB models only[9]
Memory	256 MB DRAM built into Apple A4 package (top package of PoPcontains two 128 MB dies)[12]
Display	1024 × 768 px (aspect ratio 4:3), 9.7 in (25 cm) diagonal, appr. 45 in2 (290 cm2), 132 PPI, XGA, LED-backlit IPS LCD[9]
Input	Multi-touch touch screen, headset controls, proximity and ambient light sensors, 3-axisaccelerometer, magnetometer
Camera	None
Connectivity	Wi-Fi (802.11a/b/g/n), Bluetooth 2.1+EDR, USB 2.0/Dock connector Wi-Fi + 3G model also includes:A-GPS, micro-SIM slot, Quad-bandGSM 850 900 1800 1900 MHzGPRS/EDGE, Tri-band UMTS 850 1900 2100 MHz HSDPA
Online services	iTunes Store, App Store, MobileMe,iBookstore
Dimensions	242.8 mm (9.56 in) (h) 189.7 mm (7.47 in) (w) 13.4 mm (0.53 in) (d)
Weight	Wi-Fi model: 680 g (1.5 lb) Wi-Fi + 3G model: 730 g (1.6 lb)[9]

Repost from :wikipedia