Why the previous TV life can reach 30 years, now LCD TV can not do?

The former conventional TV life expectancy can reach 30 years, depending on how it is analyzed.

Tube TV life can reach 30 years?

Under the general cognition, we think that the CRT TV (CRT TV) of 20,000 hours, if you turn on the computer 3 hours a day (in the material scarcity, the TV belongs to the era of luxury goods, each family will never turn on the computer time like the present day can turn on the computer for more than 6-7 hours a day) calculation, that is, about 18 years of time.

But in the era when plasma and LCD TVs were not popularized, CRT technology has also undergone two or three decades of development, and at that time, CRT screen life has reached 50,000 hours, according to the calculation of 4 hours of power on every day, to cope with a 30-year life is not a problem.

But, in addition to the CRT screen, the CRT TV life of those factors?

Analysis of factors affecting the life of CRT TV

There are three main factors affecting the life of CRT TV, in addition to the vacuum of the tube decreases, and then is the phosphor aging and filament breakage.

I believe that after such an interpretation, the family has had CRT TV readers will remember.

As shown in the figure above, the tube belongs to the vacuum space, if after a long period of time after the use of air into its interior, it will lead to a decline in the brightness and clarity of the image, the image becomes blurred.

Moreover, the entry of air into the tube leads to a decrease in the vacuum level, which also leads to rapid aging of the tube, seriously affecting the life of the tube.

As for the fluorescent part, under normal use, its aging speed is slow. But if the user likes to brighten the screen, the contrast is adjusted very high, or in the case of the image has a flickering bright strip with the use of disease, phosphor after a long time of high-intensity, high-power e-books issued by the electron gun impact, resulting in a decline in the luminous capacity of the phosphor, the emergence of phosphor fatigue and burns, which is the cause of the tube aging of another reason.

The third reason that affects the life of traditional TVs, i.e. CRT TVs, is filament aging. As we all know, CRT TV filament is only a few tens of microns in diameter tungsten alloy filament, filament ends and metal wire welding place has a large contact resistance. In the boot of the moment due to the surge effect, the filament current than the normal operating current is several times greater than the welding of the instantaneous power is greater, the welding point is the high current burned white, after a long period of time and countless repeated start-up thermal shock, the filament may be in the weld burned off, so that the tube is scrapped.

Finally, it should be noted that we consider the CRT life and LCD TV or Smart TV life comparison, CRT TV only consider its hardware life can be, but LCD TV (including the former plasma TV) and Smart TV, its impact on the life of the factors, in addition to the hardware factors, but also to consider its software software life.

Hardware factors affecting the life of LCD TVs

LCD TVs, usually what we often call LCD TVs, the full name in English is Liquid Crystal Display).

LCD TVs mainly use TFT-type liquid crystal display panels, the main components include, fluorescent zhi tube, light guide plate, polarizing plate, filter plate, glass substrate, directional film, liquid crystal materials, thin mode transistors and so on.

LCD displays must first use the backlight, that is, fluorescent tubes to project a light source, which will first pass through a polarizing plate and then pass through the liquid crystal, when the arrangement of liquid crystal molecules and thus change the angle of light penetrating the liquid crystal. The light then has to pass through a color filter and another polarizer. Therefore, by changing the voltage that stimulates the liquid crystal, we can control the intensity and color of the light that finally appears, and then we can change the color combinations with different shades on the LCD panel.

LCD TVs and plasma TVs should be considered contemporaneous technologies, and plasma TVs were developed relatively earlier than LCD TVs, but LCD TV technology was ultimately far superior to plasma TV technology by several blocks.

As a decade-old technology, we need to briefly analyze the advantages and disadvantages of both.

Plasma TV has a flicker-free image, thin thickness, light weight, bright colors, vivid images, etc., and compared to the LCD TV chief that achieved the screen large, but the significant disadvantages of plasma TV is a large power consumption, limited life expectancy, easy to age. The main reason for its short life is because of high power consumption, heat and other factors, resulting in a serious aging rate of the hardware, shortened life.

The LCD TV also has a flicker-free image, thin thickness, light weight and other characteristics, and LCD screen has been widely used in the field of PC, and later LCD screen is also widely used in smart phones, confirmed because LCD screen is widely used in the size of the screen film of the TV, and its screen is getting bigger and bigger, computer monitors and laptop monitors, as well as the world's popularity of the smart phone, so in the ability to large-scale and large screen. Screen miniaturization and other aspects of the superiority of plasma screens, and the clarity is getting higher and higher, and ultimately close to replacing plasma TVs. With the scale of LCD technology and production, the cost is getting lower and lower, ultimately leading to today's popularity.

In the service life, because the LCD TV screen down to half the brightness of the more than 50,000 hours, while the plasma TV only needs 20,000 hours, and LCD TV power consumption is only 1/3 of the plasma TV, some of the plasma products are as high as 400 watts / hour above the power consumption. These factors, it led to the life of LCD TVs far more than plasma TVs.

It is because of the plasma TV power consumption and short life mutual constraints, coupled with the LCD screen more and more can be large (and small), more and more high definition, the cost is getting lower and lower, LCD TVs, LCD computers, LCD cell phones into the life of everyone.

At this time, we consider the life of the TV, the main consideration is still the hardware factors, its life in 8 ~ 10 years are no problem.

However, technology has evolved to the point where smart TVs have entered our lives, and the life of a TV is not only related to the hardware, but also to the software it carries.

Smart TVs are also "aging"

In recent years, curved TVs and smart TVs have come into people's lives.

Last year, Huawei's first TV products honor wisdom screen, hit in Huawei's Hongmeng system.

In the same period, Xiaomi's smart TV also began to internalize the video call function.

Soon after, a variety of smart TVs its on, equipped with the Android system of smart TV into the era of rapid progress.

Soon after, the first group of people who experienced Smart TV followed a disturbing phenomenon - like Android smartphones, Smart TV has the phenomenon of lag.

Then came the concern - if smart TVs, like smartphones, get stuck in two or three years and have to be replaced, then it would be better to buy a non-smart TV.

Then, people thought, if Smart TV will become more and more bloated with the iterative upgrading of software and more and more installations, then it would be better to go back to the era of LCD TVs + boxes.

The TV focuses on the development of audio and video technology, and the box realizes the bridge of human-computer interaction.

So, smart TV, if you can not realize the software light, then, did not wait for the hardware aging, the degree of bloat of its software, will lead to its service life and the same Android system phone, shortened to 2 ~ 3 years,

A very simple truth, the more complex things are more prone to bad, because he attached more functions, high integration, each part has the possibility of bad, cumulative It is certainly easy to get up, and the components are concentrated heat dissipation is not good, on the contrary, the previous TV structure is very simple, the heat dissipation area is not easy to bad, just aging badly will be bad.

Now the electrical appliances, manufacturers can not wait to early bad, not bad can not sell new, things are cutting corners, LCD as can be used for decades, the airplane monitor is also LCD, can be used for decades.

In the past, money was very valuable, a 21-inch are several thousand, converted to the current tens of thousands. The first time I saw this was when I was in the middle of a movie, and it was the first time I saw a movie. Now, 75-inch color TV, less than 6K, not whole fast bad let manufacturers drink the northwest wind?

In fact, most of the previous home appliances discrete components, which is bad for that, basically 2-30 years of electrical appliances, most of the components have also been changed, color TV with so long did not change the tube seat I do not believe that, especially in the humid South, the boot blur a blur, ten minutes after the picture is clear.

Two now large-scale integrated circuits, IC, life was relatively short, bad and difficult to change, which board is generally bad the whole change, if you meet the panel drive circuit, the basic declaration of the screen together with the scrap. Now the LCD TV, three to seven years. Give you an excuse to change the big TV.

Older computers, low configuration

Some people in the past can live to be over 100 years old, and now there are a lot of people thirty-forty years old, you want to think about what the reason is, and want to think about a good send up everyone to discuss it.