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i Phone 4
The iPhone 4 features a redesigned structure , designed by Jonathan Ive. Most notably , the bulges of the back panel as well as the band between the front & back are gone & have been replaced with flattened surfaces. The redesign reflects the utilitarianism & uniformity of existing Apple products, such as the IPad & the iMac. The only remnant of the previous generations of iPhone is the general layout of the device; the distinctive metal structure of the iPhone4 is more reminiscent of the 3G & 3GS. The overall dimensions of the iPhone 4 have been reduced from its predecessor. It is 4.5 inches ( 110mm) high, 2.31 inches (59mm) wide & 0.37 inches (9.4mm) deep, compared to the iPhone 3GS, which is 4.55 inches (116mm) high, 2.44 inches (62mm) wide, & 0.48 inches (12mm) deep; making the iPhone 4 24% thinner than its predecessor, the iPhone 3GS.
Steve jobs claims that it is " the thinnest smart phone on the planet." The devices reduced size is primary due to the antennas being placed externally.
Steve Jobs , CEO at Apple , holding a white iPhone 4.
Steve jobs claims that it is " the thinnest smart phone on the planet." The devices reduced size is primary due to the antennas being placed externally.
Steve Jobs , CEO at Apple , holding a white iPhone 4.
The i Phone 4 is structured around a stainless steel frame which both acts as the primary structure for the device, & additionally acts as the iPhone 4's antennae. The stainless steel enclosure features three slits that divide the band into three sections; the left section of band acts as the Blue tooth , Wi-Fi , & GPS & antenna , & the right & lower bands sections act as the antenna for GSM & UMTS connectivity, There is some debate as to whether or not not this causes issues with signal strength & availability, The act of touching the gap between the two antennas with an UN- gloved hand potentially bridges these two separate antennas , leading to poor signal reception.
The internal components are situated between two panels of aluminosilicate glass , described by Apple as being " chemically strengthened to be 20 times stiffer and 30 times harder than plastic , " theoretically allowing it to be more scratch resistant and durable than the previous models.
The iPhone 4 switches the placement of the microphone & speaker on the base on the unit the speaker is now on the left.
Display
The display on the iPhone 4 is designed by Apple and is manufactured by LG, it features an LED back lit LCD capacitive touchscreen with a pixel density of 326 pixels per inch (ppi) on a 3.5 inches (8.9 cm) (960-by-640) display, each pixel is 78 micrometers in width. The display has a contrast ratio of 800:1 . The screen is marketed by apple as the "Retina display," based on the assertion that a display of approximately 300 ppi at a distance of 12 inches (305mm) from one's eye is the maximum amount of detail that the human retina can process.
The display on the iPhone 4 is designed by Apple and is manufactured by LG, it features an LED back lit LCD capacitive touchscreen with a pixel density of 326 pixels per inch (ppi) on a 3.5 inches (8.9 cm) (960-by-640) display, each pixel is 78 micrometers in width. The display has a contrast ratio of 800:1 . The screen is marketed by apple as the "Retina display," based on the assertion that a display of approximately 300 ppi at a distance of 12 inches (305mm) from one's eye is the maximum amount of detail that the human retina can process.
iPad
The iPad is a tablet computer designed and marketed by Apple for Internet browsing , media consumption, gaming, and light content creation . Released in April 2010, it established a new class of devices between smart phones and laptops. As of may 3, 2010, Apple had sold 1 million iPads.
Similar to the older ( and smaller ) iPod Touch and iPhone , the iPad runs a modified version of the iPhone OS and is controlled by a multi-touch LCD sensitive to fingertips , not a stylus. It runs iPad - specific applications as well as those written for the iPhone and iPod touch, including e- book readers.
The iPad uses Wi-Fi or its 3G data connection to browse the Internet, load and stream media, and install software, A USB cable is required to sync the iPad with iTunes on a personal computer.
SCREEN AND INPUT
The touchscreen is a 25 cm (9.7 in ) liquid crystal display (1024*768 pixels , 132 ppi, XGA ) with fingerprint-resistant and scratch-resistant glass. Like the iPhone, the iPadis designed to be controlled by bare fingers , not gloves and styli that prevent electrical conductivity (although there are 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 , which work in three orientations, the iPad supports screen rotation in all four orientations , meaning that the device has no intrinsic "up" or "down" ; only the position of the home button changes. Most iPad applications support both portrait and landscape mode.
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.
Similar to the older ( and smaller ) iPod Touch and iPhone , the iPad runs a modified version of the iPhone OS and is controlled by a multi-touch LCD sensitive to fingertips , not a stylus. It runs iPad - specific applications as well as those written for the iPhone and iPod touch, including e- book readers.
The iPad uses Wi-Fi or its 3G data connection to browse the Internet, load and stream media, and install software, A USB cable is required to sync the iPad with iTunes on a personal computer.
SCREEN AND INPUT
The touchscreen is a 25 cm (9.7 in ) liquid crystal display (1024*768 pixels , 132 ppi, XGA ) with fingerprint-resistant and scratch-resistant glass. Like the iPhone, the iPadis designed to be controlled by bare fingers , not gloves and styli that prevent electrical conductivity (although there are 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 , which work in three orientations, the iPad supports screen rotation in all four orientations , meaning that the device has no intrinsic "up" or "down" ; only the position of the home button changes. Most iPad applications support both portrait and landscape mode.
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
The iPad can use Wi-Fi network trilateration from sky hook wireless to provide location information to applications such as Google Maps. The 3G model contains A-GPS while both models have a digital compass.
The back of the Wi-Fi model ipad is made of contoured aluminium with black plastic buttons. The Wi-Fi+ 3G model also has a black plastic accent on top of the device which helps with 3G radio sensitivity . The ipad does not have any ports for wired connectivity.