iPhone 4 star performer- screen technology

A beginners guide to LCD and Touchscreens

Liquid Crystal Display (LCD) screens were invented in the 1980’s when they appeared in black and white in hand calculators and digital watches. Although we now have LCD in colour, the basics remain the same: each dot or pixel, in a LCD contains solid crystals held in clear liquid, sandwiched between electrodes. When power is received by these electrodes, the crystals line up and block the passage of polarised light, turning the pixel black. In a colour display each pixel has a red, a green, and blue cell. LCD is found in mobile phones, digital cameras, satnavs and iPads.

Touchscreens let you tap in emails and flip through menus without a physical number or keyboard. They come in 2 forms – resistive and capacitive. Resistive touchscreens need a sharp prod to select options and are found on the cheaper devices; capacitive touchscreens are found on the more expensive smartphones, such as iPhones, and respond to the electrical properties of human skin. That means they can respond to the slightest glide, swish, or flick of the finger.

What about Resolution

The resolution on your screen is all about how many pixels it contains as this determines the sharpness of the images on your screen. For example, your lowest resolution is used for text and basic gaming (256×152); Satnav and music requires higher resolution (320×240); ebooks, camera displays and web browsing require  (800×480); high definition HD (960×640) are needed for sharp videos and office documents.

Iphone 4 your star performer

The Apple iPhone 4 has an outstanding retinal display that packs in almost as many pixels on its 3.5in screen as the Apple iPad does in 9.7in. This gives you the experience of watching a high definition screen held in the palm of your hand. The iPhone 4 LCD’s are far sharper and more colourful than ever giving them many advantages over other smartphones. LCD’s are inexpensive to manufacture; games, videos and high resolution photos look great and they are very bright (try the iPhone’s torch app – it can light your way in the dark). Although, some users have found the screen too bright when reading long passages of text.

For further information regarding your choice of iPhone check our Homepage and select – Choose your iPhone.

Source: thesundaytimes.co.uk/ingear