Healthcare and Life Sciences. Internet of Things IoT. Enabling Remote Work. Small and Medium Business. Humans of IT. Green Tech. MVP Award Program. Video Hub Azure. Microsoft Business. Microsoft Enterprise. When low-power LCDs became available, the development of the battery-powered laptop finally became possible. Today, the size of the display is the single most important determinant of the size of the laptop. Currently, virtually all laptops use active-matrix color displays. These screens provide needle-sharp images of high contrast, in most cases better than the CRT displays that most desktops use.
Indeed, many desktop users are now upgrading to flat panels. The prime impetus for this switch may be to save space, but the improved image quality is at least a partial factor. There are, however, a few drawbacks to LCD displays. The first is that they have a fixed or native resolution. CRT displays can easily switch to higher or lower resolutions. When LCDs are moved above or below their native resolution, however, the image becomes decidedly blurry or even distorted. The second drawback of LCDs is their limited field of view.
These displays may present high-quality images, but only to viewers sitting directly in front of the screen. People who may be sitting a few feet to the right or left of that optimal position may see an image where the colors have been shifted and the contrast lowered.
With the increasing popularity of LCD televisions, some LCD manufacturers are developing screens that are more suitable for wide-angle viewing. If you plan to use your laptop for informal presentations, you should take a look at laptops that advertise wide-angle capability.
Of course, some people prefer a more limited viewing angle because it makes it harder for other people to read your screen when you are working in public.
The good news here, however, is that the prices of LCDs have continually dropped over the years and will continue to do so. Indeed, the popularity of desktop LCD displays should lead to increased volumes and lower prices for both desktops and laptops.
Because the technologies used in today's LCDs are basically similar, the main differences among screens have to do with their sizes, their resolutions, and their aspect ratios. Chapter 11, "Graphics and Sound," includes more detailed information on displays. In general, as time progressed, screens became continually larger. There is, however, a size limit for laptops. As LCD screen sizes moved beyond 17 inches, measured diagonally, they became too large to be portable and were relegated to desktop use.
In today's laptops, screen sizes vary from 7. The most common size is now In general, users are well advised to get the largest screen they can comfortably carry and afford. But note that for some screen sizes, there may be a choice of several different resolutions available. Choosing the wrong resolution may make the screen harder to read, or limit the amount of information that can be displayed.
Screen Resolution The resolution of a screen depends somewhat on its size. As the size of the screen increases, it can comfortably accommodate more pixels, thus allowing for increased resolution. For A few vendors also offer SXGA, but the unique aspect ratio makes that size and resolution somewhat rare. Increased resolution also increases pixel density the number of pixels per inch of screen size , which in turn increases the apparent sharpness of photographs and graphic images.
Some people even maintain that increased pixel density increases the readability of text. On the downside, however, increased resolution also decreases the size of standard text and icons on the screen.
Note that once you have chosen a resolution, it cannot be changed. A laptop's video circuitry can simulate a change in resolution, but the resulting image will be much less sharp than the image at the screen's original or native resolution.
In the distant past, some laptops, such as the IBM PC Convertible and the Toshiba T, used wider display screens because that was all that was available. When LCD screens came out, the public quickly gravitated toward this standard shape. Now, however, with the popularity of DVDs and high-definition TV, many manufacturers are installing widescreen displays on their systems see Figure 2. These displays have a wider aspect ratio of Widescreen laptops are usually sold as multimedia or desktop replacement systems, due to their larger and clumsier to carry sizes.
As more people use their laptops in home entertainment systems or as personal DVD players, expect this number to grow. Photo courtesy of Dell Inc. For example, many so-called "widescreen" laptops have Personally, I would rather have a standard aspect ratio At the higher x pixel resolution, you'll actually be able to fit more open windows web pages, applications, and so on both in width and depth than you could on a WXGA screen.
The primary advantage of using a widescreen on a laptop is that human vision sees more peripherally than vertically, making wider screens better suited to what you actually see on them.
Video Accelerators A crucial and sometimes overlooked aspect of computer performance is the speed of its video accelerator. This chip, shown in Figure 2. Computer game players have been especially sensitive to the speed of their video processors because this can greatly influence the quality of their entertainment. But business users should also be aware that a video accelerator can impact tasks such as sales presentations. Additional support for combo solutions extends connectivity options, increasing flexibility for system builders to design a variety of Serial ATA RAID controller cards, satisfying requirements of multiple market segments.
Flexible Configuration Options: Supporting multi-level RAID, the VIA VTA enables end users to configure their hard drives for maximum performance, maximum assurance for critical data security or maximum capacity, while backwards compatible to the Parallel ATA specification, enabling connectivity to the installed base. Compliant with the Serial ATA specification 1.
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