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| discontinued = | lifespan = | price = | unitssold = 3 million iPad Minis and fourth-generation iPads were shipped in the first weekend of sale. | unitsshipped = | media = | os = Original: iOS 6.0.1 Current: iOS 9.1, released | power = Built-in rechargeable Li-Po battery 11,560 mAh 3.7 V 〔(【引用サイトリンク】 title=iPad 4 Teardown )〕 | soc = Apple A6X | cpu = 1.4 GHz dual core Apple Swift | storage = 16, 32, 64 or 128 GB flash memory〔 | memory = 1 GB LPDDR2 RAM | display = 2,048 × 1,536 px color IPS LCD display at (264 ppi) with a 4:3 aspect ratio, fingerprint-resistant oleophobic coating | graphics = Quad-core PowerVR SGX554MP4 | sound = | input = Multi-touch screen, headset controls, proximity and ambient light sensors, 3-axis accelerometer, 3-axis gyroscope, digital compass | controllers = | camera = Front: 1.2 MP, 720p HD Rear: 5.0 MP AF, iSight with Five Element Lens, Hybrid IR filter, video stabilisation, face detection, ƒ/2.4 aperture | touchpad = | connectivity = | service = App Store, iTunes Store, iBookstore, iCloud, Game Center | dimensions = ''(height)'' ''(width)'' ''(depth)'' | weight = Wi-Fi model: Wi-Fi + Cellular model: | topgame = | compatibility = | predecessor = iPad (3rd generation) | successor = iPad Air | related = | website = }} The fourth-generation iPad (originally marketed as iPad with Retina display, retrospectively marketed as the iPad 4) is a tablet computer produced and marketed by Apple Inc. Compared to its predecessor, the fourth-generation iPad maintained the Retina Display but featured new and upgraded components such as the Apple A6X chip, and the Lightning connector, which was introduced on September 12, 2012. It shipped with iOS 6.0, which provides a platform for audio-visual media, including electronic books, periodicals, films, music, computer games, presentations and web content. It was announced at a media conference on October 23, 2012 as the fourth generation of the iPad line, succeeding the third-generation iPad, and was first released on November 2, 2012 in thirty-five countries. The device was released throughout December in ten other countries including China, India and Brazil. The third generation was discontinued following the fourth's announcement. The device is available with either a black or white front glass panel and various connectivity and storage options. Storage size options include 16 GB, 32 GB, 64 GB, and 128 GB; the available connectivity options are Wi-Fi only and Wi-Fi + Cellular with LTE capabilities. The fourth-generation iPad received primarily positive reviews and was praised for its hardware improvements as well as the Retina display, which was also featured in the device's predecessor. Furthermore, benchmarks reveal that the fourth-generation iPad is able to perform CPU-reliant tasks twice as fast as its predecessor. During the first weekend of sales, an aggregated amount of three million fourth-generation iPads and iPad Minis were sold. ==History== Rumors regarding the next-generation iPad emerged shortly after the release of the third-generation iPad. At that point some speculated that the next iPad released would be of a smaller size. Further speculations emerged in July 2012 when DigiTimes, with the help of unspecified sources, claimed that Apple made small revisions to the then upcoming iPad and scheduled its release for late 2012. On October 16, 2012, Apple announced a media event scheduled for October 23 at the California Theatre in San Jose, California. The company did not pre-disclose the subject of the event, but it was widely expected to be regarding the iPad Mini. Photographic images of the device's dock connector and front camera emerged shortly before the media event. At the media event, Apple CEO Tim Cook introduced a new version of iBooks and new generations of the MacBook Pro, Mac Mini, and the iMac before unveiling the fourth-generation iPad and the iPad Mini. During the unveiling, Apple stated that the fourth-generation iPad would be available to pre-order online in a selected number of countries starting October 26. On November 2, Apple released the Wi-Fi model of device in thirty-five countries across Europe, East Asia and North America. The cellular model was released in-store a few weeks after the initial release of the device.〔 The release of the fourth-generation iPad led to the discontinuation of its predecessor, which angered many third-generation iPad users.〔 In response, Apple extended its 14-day return policy to 30 days. ''ITProPortal'' noted that, since the price of both models is identical, consumers that purchased the third-generation iPad within this time frame were effectively allowed to exchange their discontinued device for the fourth-generation model. On January 29, 2013, Apple announced and scheduled the launch of the 128 GB variant of 4th generation iPad. It was released on February 5, 2013. Following the announcement of the iPad Air on October 22, 2013, sales of the fourth-generation iPad was discontinued. The fourth-generation iPad was reintroduced on March 18, 2014, following the discontinuation of the iPad 2.〔(Apple kills iPad 2 in favor of 4th-gen Retina display model ) - Engadget, March 18, 2014〕 In order to make its reintroduction a low-end device to the iPad Air, its price was cut by 20% over its original launch price. On October 16, 2014 the fourth-generation iPad was discontinued in favor of the iPad Air 2 and iPad Mini 3. The iPad Air takes its place as the entry-level iPad. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IPad (4th generation)」の詳細全文を読む スポンサード リンク
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