Important parameters of modern computer screens and tips for purchase (updated 2015) - Page 2 - Computer screens - HWzone Forums
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Important parameters of modern computer monitors and tips for purchasing (updated 2015)


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Interesting to read. A good and detailed guide.

It's amazing to see that at the time I bought U2711 and U3011 screens a lot of money and today they are not updated with the new technologies.

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Since this is an embedded post that is supposed to help anyone who visits the forum - I would love to add some parameters that are important to photographers and other people. The post opener is welcome to add to his guide and edit and shorten as he sees fit.

 

Color coverage -gamut Which is actually the color space that the screen supports and it is important to note what percentage of it the screen supports. In fact how many colors and up to what level of saturation can they reach and a few other things. There are several standards in the market with different purposes and I will mention a few.

 

SRGB Is the color space that is considered to be most suitable for the entire population. It is considered the standard of the internet and is recommended for photographers and the rest of the population. It is not considered a wide color space, although most screens of the general population still do not support 100 percent of it (of course there are some that support even the most). A lot of software and browsers are slowly aligning a line to manage their color management array according to this standard. That is And elements will rotate according to SRGB  Unless another profile is embedded.

Other sample standards that are broader - Adobe , dci-p3  And they have a different vocation in the world of video, animation and more. Photographers will be able to take advantage of this color space only in prints and it also means that they will have to create 2 different edits of the file.

 

Color deviation - Measured approxDelta-e  And in fact it's about how different the colors are than they should be. Most monitor models do not specify the average deviation you will receive directly from the factory, it is worth referring to those that do. For most mainstream models that will indicate since there is a low nominal color deviation the index will be around Delta and Of 3 or 2 as a minimum. It can be said that an average index of 2 is considered reasonable and can be edited with it. 1 and below is considered excellent and the less accurate it is. In most screens, the color deviation can be improved by calibrating with the help of an external calibrator that uses software to display colors on the screen and measure the output at the same time. The software then produces a color correction profile for the screen. The well-known companies in the field are X-RITE  Which I recommend and the second company from the companies to the general public is Datacolor Which makes the calibrators of theSpyder. I will note that there are also expensive screens that have an option for built-in calibration in the screen. I would love to mention the software displaycal Which is software opensource Which allows for accuracy and a variety of options that are locked in the software of the cheaper calibrators and also in many cases accurate from the software of the more expensive ones.

 

 

PWM (Pulse-Width Modulation) This is about That you do not really want on your screen. And unfortunately most screen companies use it. In fact for such and other reasons the screen in time particles measured inHerz Turns off and on. You do not see it happening in the eye but when your screen is set to a slow speed measured in tens Herz Or a little more (beats per second), you might feel it more without knowing why. Quick shutdown and on can cause long-term headaches and eye fatigue. Most often when you lower the brightness of the screen then it will be more present. The level of e can be measuredPWM Only by special tools (sometimes you may come across it when shooting fast shutter speed with the camera). Most often higher speed where this happens for example 22000 Herz Considered to least affect fatigue and headaches. Of course it is better that the screen does not use it at all and there are many screens that do not use this technology.

 

Maximum brightness  Most manufacturers like or dislike to specify the maximum brightness of the screen measured incd / m2 And it's important to understand something about it. It has become a standard that many monitors indicate they reach a median of 300 cd / m2 And more, and yes it helps when in the sun and the like. But it is important to note that in order to achieve correct color accuracy including printing, one must usually be in the range of only between 80 and 120 cd / m2.  Everything to his body of course.

 

Scatter the brightness on the screen Brightness uniformity  In fact even on our screen not every part is the same as another area in it. A left corner may be brighter than the right corner and the like. By calibrators you can measure and see the brightness distribution on the screen is equal to its entire length or vice versa. Think for example that you need to draw a wall in pencil and even if it appears to you on a screen that the display is smooth, in the transition to another screen or printing you will find that there are areas that you have painted more or less. I will note that for most reasonable screens this problem is relatively marginal. The index is usually measured as a percentage.

 

 

 

Edited By NR
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