iPhone - Trends and Technology of iPhone
Pen Drive - Computer Data in your HandApple announced the iPhone on January 9, 2007, after months of rumours and speculation. The original iPhone was introduced in the United States on June 29, 2007 before being marketed worldwide. Time magazine named it the Invention of the Year in 2007. Released July 11, 2008, the iPhone 3G supports faster 3G data speeds and assisted GPS. On March 17, 2009, Apple announced version 3.0 of the iPhone OS operating system for the iPhone (and iPod Touch), released on June 17, 2009. The iPhone 3GS was announced on June 8, 2009, and has improved performance, a camera with more mega pixels and video capability, and voice control. It was released in the U.S., Canada and 6 European countries on June 19, 2009 and international release in July and August, 2009.
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Screen and input of I-Phone
The touchscreen is a 9 cm (3.5 in) liquid crystal display with scratch-resistant glass,Ò and can render 262,144 colors. The capacitive touchscreen is designed for a bare finger, or multiple fingers for multi-touch sensing.Ò The iPhone 3GS also features a new Fingerprint-resistant oleophobic coating.
The display responds to three sensors. A proximity sensor deactivates the display and touchscreen when the device is brought near the face during a call.Ò An ambient light sensor adjusts the display brightness which in turn saves battery power. A 3-axis accelerometer senses the orientation of the phone and changes the screen accordingly, allowing the user to easily switch between portrait and landscape mode. Photo browsing, web browsing, and music playing support both upright and left or right widescreen orientations.
A software update in January 2008 allowed the first generation iPhone to use cell tower and Wi-Fi network locations trilateration, despite lacking GPS hardware. The iPhone 3G and iPhone 3GS employ A-GPS, and the iPhone 3GS also has a digital compass.
The iPhone has three physical switches on the sides: wake/sleep, volume up/down, and ringer on/off. These are made of plastic on the original iPhone and metal on all later models. A single "Home" hardware button below the display brings up the main menu. The touch screen furnishes the remainder of the user interface.
The back of the original iPhone was made of aluminum with a black plastic accent. The iPhone 3G and 3GS feature a full plastic back to increase the strength of the GSM signal. The iPhone 3G is available in black with 8 GB of space, and the discontinued 16 GB model was sold in either black or white. The iPhone 3GS is available in both colors, regardless of storage capacity.
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