One is stronger than nokia
The duration of an electronic product is limited, and three factors affect its useful life. The first is the appearance of products, such as mobile phones, which, after a long period of use, are worn, scratched, and the prevailing trend in the product is changing. The second aspect is that the user is forced to start thinking about changing the machine. The second aspect is the configuration of mobile phones and computers, which are generally used for two years at a time when the technology product is developing at a rapid pace. Both the game and the office, the product feels constrained, and therefore needs to change the machine, even if it is a non-kia cell phone, which is very strong and does not extend the holding period well。
Five years to throw old monitors into the eye killer?
However, for monitors, these factors have lost their effect, starting with their appearance design, which is not the focus of the product. Although many users now consider the design of the monitor, after all, the style of the monitor has changed very slowly, the new product has not seen any significant improvement in the design of its appearance, and the monitor is a product used in a fixed location, with a lesser decorative effect, so the need for its appearance has not been a major factor in the renewal of the monitor。
The monitor has a long backlight module life
In terms of performance, 1080 p-resolution monitors have long appeared and, although 4k monitors have begun to be replicated, for the vast majority of people, 1080 p-resolution is sufficient. With many users of general needs, the colour and contrast requirements for monitors are not high, so the desire for higher performance is not evident in the monitor product。
Second-hand monitors are common
Most notably, displays are not easily damaged, and the long life of the lcd panel is not too challenging for tens of thousands of hours of use, as is the back light system. The greatest advantage of leds is their long life, together with the high life of the setup such as the driving ic, so it is too common to use monitors for three or five years. Whether in the company or at home, we can often see the displays many years ago being “in service”. So what's wrong with products that have been in service for so long? That is our theme today。
Two pieces of paper: what's wrong with being used?
First of all, let's see what's wrong with the old monitor. In two ways, we look first and foremost at the safety of products. As a result of years of use, since liquid crystal display screens, switches, relay plugs, stickers, etc. Are all elemental devices, they all have useful life and safe life periods, and the insulation, stability and reliability of these object-friendly devices are reduced beyond the safe-use period, with the potential to cause unsafe hazards such as fire, burning and bursting。
The monitor's ic-driving with age risk
As a result, the association of the electronic video industry published the safe years of use of palette television in kyoto. The regulation states that tablet televisions have a safe life of seven years. We all know that lcd tv is basically the same as the monitor, so it also gives some reference to the duration of the monitor. Seven years is of course the limit, and this does not mean that within seven years, the display of monitors will be in question。
Brightness affects the flash
Theoretically, as a result of the decline in the backlight module, the brightness of the display is inevitable. The change in brightness will have a very visible effect on the colour of the monitor, the contrast so often. If we continue to use a monitor, it may be difficult to detect this slow change, but the change in the picture is objective, how much decline will the old monitor be? Let's talk with data。
3 real data: changes in monitors over three years
First, we found two products using the same size, the same screen mass, and the same back-lighted product, the mva panel product of a taiwan manufacturer, with 21. 5 inches of screens, one produced in 2011 and one in 2014. Both displays are used as office machines for company colleagues for approximately eight hours a day, and the environment in which they can be said to be essentially similar. Together with the production by the same manufacturer, its product uniformity is more reliable, and we tested the two monitors separately。
It's two of them
Product brightness measured at 140. 2 in 2011
Screen brightness in 2014 was 173. 6
From the brightness comparison data, we can see that after three years of use, the two initials are in the same state as the products, and the actual values have changed significantly. Even though the brightness of each monitor varies somewhat, a clear downward trend can be observed by comparison. The decrease in brightness will naturally affect the performance of contrasts, so the sharpness of the picture will drop with longer time displays, although one may not feel it at once。
(left is 2011) color field comparison of two machines
We've also tested the colours, and with actual data we've found that the colours of the new and old products have not changed significantly, nor have they decreased because of brightness decline. The rationale is also very simple, since the instrument's determination of the colour field primarily affects the elements of the spectrum, which, because of the use of led back light, does not differ in the spectral composition of the light, nor does the spectral composition change because of the decrease in the brightness, so that the colour field of the old monitor has not changed significantly。
The color temperature of the machine in 2011
The color temperature of the machine in 2014
The results of the tests on colour temperature also indicate that the change in this indicator is not significant in relation to time. The temperature of the machine was warm in 2011 and cold in 2014, but it was not much different from the standard value of 6,500 k, so that the color temperature of both monitors was suitable for the normal stage, and the colour temperature of each monitor was somewhat different, which is to be excused。
Continuing testing: a set of five-year data tracking
We also followed up on a five-year-old monitor, which we all tested at four years and five years. Based on the brightness test of this monitor, it is also shown that the problem of visible brightness is widespread. The reduction of almost 90 per cent in the brightness of a product that has been in use for up to five years is striking。
Product brightness was 103. 0 in 2009
There's not much change in the five-year colour field
Three-year brightness comparison
If friends familiar with monitor technology know that the brightness of the screen is lower, not only does the product affect the contrast of the product, but the effect of the low brightness on screen flashes is very intuitive. The lower the brightness of the screen, the more frequent the screen blinks, which is very detrimental to the protection of the eye, which is prone to weariness, which grows over time and the accumulated harm cannot be minimized. In addition to increasing scintillation, we tested the brightness of the screen。
Monitor brightness parity in 2009
Display brightness equalisation 2014
By testing the brightness homogeneity, we find that the monitor is used too long, that the brightness decrease is only one side, and that the unevenness of the screen will change dramatically. We see a 19 per cent gap between the brightest and darkest spot of the machine in 2009, while the brightness margin remains around 5 per cent for the new 2014 machine. Although there are differences in each product, the overall data show that the machine in 2009 is in a state of decay in terms of even brightness。
5 comprehensive summary: not bad does not imply replacement
Through practical use experience, we know that display damage is very difficult, and if not physical damage, simple ageing is difficult to eliminate, which is why many people have been using products purchased three or five years ago. It's not bad to use old monitors, and by data testing we know that for old monitors the brightness loss is the worst, and after five years of use the brightness loss may be as high as 90%, which means that if you've had the monitor in front of you for more than five years, it's probably half the brightness of the new product。
Time has the greatest impact on the display brightness
The loss of brightness also poses a series of problems, first, the problem of flash, which is not visible because of the problem of the display's electrical current mechanism, which increases when the brightness becomes dark, thus increasing the burden on the eyes; and secondly, the loss of brightness leads to a decline in contrast and the image appears to be cloudy. And because of the ageing of the internal structure, there has been a marked change in the brightness of the product, the picture is dark and the damage to the eye cannot be ignored。
People using monitors for long periods of time should replace new machines
We also found that many years of use did not have a significant impact on the color and temperature of the monitors, so users who used the old monitors did not have to worry about the inaccuracy of the colours, but the colours were less dynamic than they had been since the brightness。
Finally, we also propose that, with regard to the use of too many monitors over the years, we advocate the replacement of new items. The damage to the eyes of the old monitors is greater, the blue light and flash of the own monitors have posed a threat to the eyes, and the instability of the brightness has increased the burden of the monitors, and we should not continue to use the old monitors for the eyes. Especially when you're up to eight hours a day, and you can't save money on the monitor, plus the physical safety hazard, to start thinking about replacing the monitor。
It is common for old monitors not to be decommissioned, so what are the dangers of the constant use of such monitors? Today, we tell you from the facts what happened with the three- and five-year monitors。
Sugigi
