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The display resolution or display modes of a digital television, computer monitor or display device is the number of distinct pixels in each dimension that can be displayed. It can be an ambiguous term especially as the displayed resolution is controlled by different factors in cathode ray tube (CRT) displays, flat-panel displays (including liquid-crystal displays) and projection displays using fixed picture-element (pixel) arrays.

An example of pixel shape affecting "resolution" or perceived sharpness: displaying more information in a smaller area using a higher resolution makes the image much clearer or "sharper". However, most recent screen technologies are fixed at a certain resolution; making the resolution lower on these kinds of screens will greatly decrease sharpness, as an interpolation process is used to "fix" the non-native resolution input into the display's native resolution output.

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While some CRT-based displays may use digital video processing that involves image scaling using memory arrays, ultimately "display resolution" in CRT-type displays is affected by different parameters such as spot size and focus, astigmatic effects in the display corners, the color phosphor pitch shadow mask (such as Trinitron) in color displays, and the video bandwidth.

Computer displays including projectors generally do not overscan although many models (particularly CRT displays) allow it. CRT displays tend to be underscanned in stock configurations, to compensate for the increasing distortions at the corners.

Interlaced video (also known as interlaced scan) is a technique for doubling the perceived frame rate of a video display without consuming extra bandwidth. The interlaced signal contains two fields of a video frame captured consecutively. This enhances motion perception to the viewer, and reduces flicker by taking advantage of the phi phenomenon.

Progressive scanning (alternatively referred to as noninterlaced scanning) is a format of displaying, storing, or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to interlaced video used in traditional analog television systems where only the odd lines, then the even lines of each frame (each image called a video field) are drawn alternately, so that only half the number of actual image frames are used to produce video.

One of the drawbacks of using a classic television is that the computer display resolution is higher than the television could decode. Chroma resolution for NTSC/PAL televisions are bandwidth-limited to a maximum 1.5 MHz, or approximately 160 pixels wide, which led to blurring of the color for 320- or 640-wide signals, and made text difficult to read (see example image below). Many users upgraded to higher-quality televisions with S-Video or RGBI inputs that helped eliminate chroma blur and produce more legible displays. The earliest, lowest cost solution to the chroma problem was offered in the Atari 2600 Video Computer System and the Apple II+, both of which offered the option to disable the color and view a legacy black-and-white signal. On the Commodore 64, the GEOS mirrored the Mac OS method of using black-and-white to improve readability.

When a computer display resolution is set higher than the physical screen resolution (native resolution), some video drivers make the virtual screen scrollable over the physical screen thus realizing a two dimensional virtual desktop with its viewport. Most LCD manufacturers do make note of the panel's native resolution as working in a non-native resolution on LCDs will result in a poorer image, due to dropping of pixels to make the image fit (when using DVI) or insufficient sampling of the analog signal (when using VGA connector). Few CRT manufacturers will quote the true native resolution, because CRTs are analog in nature and can vary their display from as low as 320 200 (emulation of older computers or game consoles) to as high as the internal board will allow, or the image becomes too detailed for the vacuum tube to recreate (i.e., analog blur). Thus, CRTs provide a variability in resolution that fixed resolution LCDs cannot provide.

In the Display resolution row, select the list and choose an option. It's usually best to stick with the one that's marked (Recommended). Monitors can support resolutions that are lower than their native resolutions, but text won't look as sharp and the display might be small, centered on the screen, edged with black, or stretched.

Find Display resolution, and then choose an option. It's usually best to stick with the one that's marked (Recommended). Monitors can support resolutions that are lower than their native resolutions, but text won't look as sharp and the display might be small, centered on the screen, edged with black, or stretched.

Pixel(picture element) is a smallest controllable element of a display device and therefore pixels are basic building blocks of any image you see on screen.

Each pixel is divided into three subpixels, each showing one color of varying intensity/brightness: red, green and blue(RGB). Thanks to human perception of colors, combinations of different shades of these three primary colors give single screen pixel way to reproduce all other colors in color gamut.

Contemporary smartphones and tablets may use different number of subpixels per pixel(PenTile matrices) but principle stays the same.

Pixel density is an attribute of a display device measured as number of device pixels within one inch of screen space, either in horizontal or vertical direction. Value of pixel density is expressed as dpi(dots per inch) or ppi(pixels per inch). Historically term dpi has been used for printers & scanners and even though for electronic displays term dot translates to pixel and therefore ppi would be more correct term, today both terms are used interchangeably.

Pixel density determines how high is the definition of the display. The higher the pixel density of the display, the sharper and crisper are text and images being displayed.

If the DPR of your display device is greater than 1, quest for asking yourself what is my screen resolution might have left you wondering why is the info from screen resolution test here different than the resolution listed in the official specifications of the device?

Answer is that applications, including your browser, use CSS pixels while manufacturer of your device gives display resolution info in physical pixels. CSS pixel is a realization of the reference pixel.

DPR is the ratio between physical(device) pixels and logical(CSS) pixels in either horizontal(width) or vertical(height) direction of a screen.

In other words, DPR is a number used for calculating CSS resolution of the screen. From DPR we can directly see how many actual physical hardware pixels make up one CSS pixel.

High pixel density devices were introduced to the consumer market in 2010 when Apple began shipping its products iPhone, iPad and iMac, equipped with Retina displays. Idea behind these high density pixel displays was to provide high-definition display that equals or exceeds the pixel density that can be differentiated by the retina of the human eye.

After the success of Retina display, various other manufacturers introduced their high pixel density displays on the market and they have since spread to the regular users.

Creating modern displays with higher physical pixel densities brought us the benefits of clearer images and sharper text but if browsers kept using one-to-one mapping between CSS pixels and device pixels as they did for classic lower pixel density desktop monitors, everything on screen would be too small to see or read.

Display technology is the term used to describe the devices and methods that are used to present visual information to viewers. Technology has evolved over time, from simple mechanical systems to sophisticated electronic and optical devices. In this section, we will briefly review some of the major milestones and current trends in display technology.

The cathode-ray tube (CRT), first demonstrated in 1897 and commercialized in 1922, is one of the earliest forms of electronic displays. It operates by using an electron gun to create images on a screen coated with phosphor. Initially, CRTs were monochrome and primarily used in oscilloscopes and black-and-white televisions. The first commercial color CRT emerged in 1954. For over half a century, CRTs dominated the display technology market, being the preferred choice for television sets and computer monitors. However, the advent of LCDs in the 2000s began to gradually displace them.

Plasma display is a type of flat panel display that uses small cells containing plasma: ionized gas that responds to electric fields. Plasma televisions were the first large (over 32 inches diagonal) flat panel displays to be released to the public. They were invented in the 1960s, but became commercially available in 1992 by Fujitsu. Plasma displays are bright, have a wide color gamut, and can be produced in fairly large sizes. However, they also consume more power, generate more heat, and are more prone to image retention than other display technologies.

Organic Light Emitting Diode (OLED) is a revolutionary display technology that has transformed the visual experience.

First practical OLED device was demonstrated in 1987. OLEDs use organic materials that emit light when an electric current is applied, eliminating the need for a backlight required by LCDs. OLEDs have several advantages over LCDs, such as higher brightness, wider viewing angles, lower power consumption, and thinner and flexible form factors. OLEDs are used in some high-end smartphones, TVs, and wearable devices.

Electronic paper is an emerging display technology which mimics the appearance of paper by using reflective and bistable materials that can retain an image without power. Electronic paper was first developed in the 1970s, but became commercially available in the 2000s with the introduction of e-book readers such as Amazon Kindle. Electronic paper has the benefits of being lightweight, low-cost, low-power and easy to read in sunlight. Electronic paper is mainly used for e-books, digital signage and other applications that do not require high refresh rates or color. ff782bc1db