Let's talk about computer monitors today: there are always many models, some very cheap, others more expensive, some large, others smaller, all flat LCDs anyway. As with all devices on sale in an electronics or computer store, manufacturers also advertise their monitors on display with many numbers and special abbreviations that give the impression that the higher these numbers, the better.
When buying a monitor or TV, most people do not have the skills to understand if those numbers mean something and justify the higher or lower price.
For this reason, let's now see what to look for when buying an LCD screen, monitor or TV, what is important to know to get the best, also debunking some urban legends.
1) A 120 HZ monitor has nothing better than a 60Hz monitor .
Hz indicates the image update rate.
The human eye does not notice any difference between a standard 60 Hz refresh rate (of an LCD / LED monitor) and 120 Hz ones.
You can find confirmation of what I say by going to the mall and watching the same video on two monitors, perhaps of the same brand and product line, different for the Hz frequency, one for 60 and one for 120.
Any differences depend on other aspects such as, for example, the hardware components of image processing that eliminate the blur from the images).
For completeness we say that the 60/120 Hz difference was instead visible with CRT monitors, which at lower frequencies tire the eyes.
LCD / LED monitors do not suffer from this defect.
2) Response times
Another myth that increases the price of an LCD screen is that related to the response time parameter which measures the amount of time it takes to process a signal.
So if you perform an action on the screen (such as mouse movement), there will be a small delay between the hand movement and the cursor movement seen on the monitor.
This time is measured in milliseconds.
Clearly the lower this time, the better 10ms is better than 30ms.
If you use an old monitor, which has a high response time, you immediately notice the annoying delays, especially in video games.
Now, however, it must be considered that the human eye also has a response time of around 10 ms.
This means that any monitor that has a response time of less than 10 ms actually does not give any qualitative advantage.
3) Contrast ratio
Most of the things salespeople say about the contrast ratio is rubbish.
The contrast ratio represents the difference between white and black brightness on the monitor.
In monitors with a high contrast ratio, whites are brighter and blacks are blacker.
Unfortunately, the contrast ratio indicated on the box is only indicative of a dynamic ratio which is only an electronic improvement (while the static ratio is proper to the screen.
The monitors with dynamic contrast in the end have a mediocre rendering in the dark scenes of the films and the objects that should be bright are instead obscured together with the background.
To find out more about this, there is a nice article on the Dday website about the contrast ratio hoax.
4) Screen size and resolution
Who doesn't like a big screen "> guide to monitor and TV screen resolution and photos
In other articles you can deepen the topic "screens" depending on what you need :
- Differences between LCD, LED and Plasma TV to understand which TV to buy
- How to choose the LCD monitor and screen resolution
