Computer screens Always cheaper but quality is there?

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Posted on: 14 May 2018 by Andrea Hankins

LCD monitors are now offered at reasonable prices in 19, 20, 22 inches diagonally or more. However, the quality is not always optimal. The criteria put forward by the manufacturers are not necessarily the ones to pay the most attention to when making their choice.

LCD monitors are now offered at reasonable prices in 19, 20, 22 inches diagonally or more. However, the quality is not always optimal. The criteria put forward by the manufacturers are not necessarily the ones to pay the most attention to when making their choice.
 
With lower prices, more and more screens cost less and less. Today, the 15-inch diagonal LCD monitors have disappeared from the shops, the 17 inches are becoming scarce. The bulk of the market is focused on the 19, 20 and 22 inches, the upper diagonals remaining more popular with creative and professional. For these screens, it takes 130-200 dollars (19 inches), 170-250 dollars (22 inches) and 200 to 300 dollars for 27 inch screens.
 
RESOLUTION AND SETTINGS
 
Once you have chosen the size of the screen, look what is its "resolution". Manufacturers use this term to refer to the maximum number of LCD cells that display. The native resolution of an LCD is the resolution in which the image will be displayed optimally. Changing it (via the settings) will cause blur in office use. The most commonly adopted on 20- and 22-inch devices is 1,680 × 1,050, with the 19-inch showing more frequently 1,440 × 900. Both are 16/10 (1,680 / 1,050 = 1,440 / 900). 16/10), the one that comes closest to the human field of vision, and therefore offers the best comfort. The benefit of this panoramic view is obvious for watching videos. In terms of office automation, these large screens offer the advantage of easily spreading several applications on the screen, a detail that for an intensive user can be very interesting. Video game enthusiasts, however, may suffer from this format and see images of their virtual heroes slightly distorted. Better then opt for a screen size 5/4, which offer a larger area diagonal equivalent.
 
Very practical, the ability to adjust the screen height is far from systematic. It allows to better adjust the position of the device. Without it, you just have to turn it back and forth. Other important settings, brightness and contrast, that we may have to change depending on the type of image viewed (film, photo, office document, etc.). They must be accessible simply by one or two buttons on the front, without going through the meanders of a menu.
 
CONNECTIONS
 
All LCD monitors have an analog VGA input. Most also offer a digital input, usually DVI, sometimes HDMI (which allows to connect a Blu-ray DVD player or a Sony Playstation type game console). A digital input is a real "plus" in that it eliminates any image degradation related to analog / digital conversions (the use of an analog VGA output forces the computer to convert the image into that mode, image which will then have to be converted back to digital to be displayed on the screen - the process can only affect the quality of the signal). To view videos in high definition, the screen must also be HDCP (High-Bandwidth Digital Content Protection) certified. A point that moviegoers must check.
 
CONTRAST RATE AND RESPONSE TIME
 
Manufacturers highlight the contrast ratio and response time of their monitors. The contrast ratio, the ratio between the maximum (white) and minimum (black) luminance [for example, 500: 1], is in fact not very relevant (which looks at its screen at its maximum contrast ratio, unless to be in full sun?). It lacks above all reliability: the methods of calculation may vary from one manufacturer to another. By default, in theory, the higher the value, the better.
 
The response time, meanwhile, indicates the time required for a pixel to go from white to black then return to white. It must be weak (8 milliseconds) to correctly display rapidly changing images (video games for example), and avoid streaks on the screen (it is called "remanence"). Unfortunately, the value advanced by manufacturers is often wrong, as we found in our tests.
 
BEAUTIFUL SPEAKERS
 
Some screens incorporate speakers, which saves space and saves the cables that would be needed to connect external amplifiers. Unfortunately, their quality often leaves something to be desired. Their presence should not therefore be a criterion of choice.

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lukenlow lukenlow posted 18 May 2018

Progress does not stand still and it seems to me that everything you said about in your article will soon come true 192.168.0.1

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mahesh kumar posted 23 June 2018

Thx for sharing this article


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