Why OLED is healthier than LCD.

Less blue light, OLED color display is more comfortable for human eyes and other factors make OLED healthier than LCD. Friends who often visit Station B often hear this sentence: Barrage Eye Protection! In fact, I want to add an eye protection Buff to myself, You only need a mobile phone or a TV made of OLED.A large number of studies at home and abroad show that,OLED screens have more significant advantages in terms of health than LCD screens. At least at this stage, Mobile phones and TVs equipped with OLED are the devices with the least damage to the eyes. Every family with children, All should choose OLED display. We can even say this: Choosing an OLED device is equivalent to choosing health.

1.

Revealing the principle of traditional screen hurting eyes

The two factors that cause “eye injury” in traditional LCD/LED screens are blue light and flicker.

Let’s start with Blu-ray.

Blue light is a high-energy visible light, It is widely believed to have harmful effects such as eye discomfort and retinal damage, It is also a factor leading to diseases such as cancer, diabetes, heart disease, obesity and insomnia.

Blue light is the highest energy wavelength of visible light. This energy can penetrate through the natural filter of the eye to the back of the eye.

The amount of blue light exposure we get through the use of digital devices is increasing rapidly every day, This has caused permanent damage to our eyes. The effect of blue light is cumulative, Can cause eye diseases, Such as macular degeneration.

Especially children, The retina is very fragile, It is vulnerable to blue light. Research also shows that ,Exposure to blue light before going to bed actually inhibits the secretion of melatonin, And significantly delay deep REM sleep. Health is therefore adversely affected. In the long term, This may lead to cognitive decline and the development of chronic diseases.

 Especially the blue light damage of smart phones, It ranks first among all devices. Because the distance of using mobile phones is often closer to other electronic devices, And more inclined to use it in the dark, The damage is often higher.

 Flicker can also cause “eye injuries”.

Flicker is the visible change in brightness between cycles displayed on a video display. It is particularly suitable for cathode ray tube (CRT) televisions, computer monitors, and plasma computer screens and television refresh intervals.

Switching the light source causes flicker. The faster the switching speed, The faster the screen flickers. DC dimming is a technology that adjusts the brightness by directly controlling the current on both sides of the light-emitting device,Most LCD screens use DC dimming. DC dimming itself is a very simple method. But it has obvious disadvantages. Due to the different wavelengths of the three primary colors, DC dimming will cause the inevitable color shift when the brightness is extremely low. This leads to eye fatigue.

Traditional LCD/LED screens, No matter from which dimension, Neither is the best choice for health.

2.

Interpretation of OLED eye protection research at home and abroad

but,  Both domestic and foreign studies have shown that, OLED is actually more eye-friendly than LCD.

In March of this year, Beijing Tongren Hospital affiliated to Capital Medical University made relevant tests on OLED eye health. The test content includes blue light emission test, subjective visual fatigue-visual comfort test, objective visual fatigue-eye accommodation test on OLED TV and QD-LCD TV.

The test results show that, All damage indicators of OLED TVs are lower than those of QD-LCD TVs. The conclusion is, The blue-off emission of OLED TV is less than that of QD-LCD TV, At the same time, the impact on visual fatigue is also smaller.

therefore, The visual fatigue after watching OLED TV for a long time will be much lower than that of QD-LCD TV. Better eye health and safety.

It’s not just on TV, The same is true on mobile phones.

October 2018,  A study from Tsinghua University in Taiwan shows that,The OLED displays of the latest iPhone XS and XS Max are healthier than the LCD displays on previous iPhone models.

As part of its “Fighting against LED and White Light Hazards” research, Taiwan’s Tsinghua University (“National Tsing Hua University”) research team led by Professor J.H.Jou has long advocated OLED lighting.

In 2015, Professor J.H.Jou once issued an appeal, Require consumers to understand the hazards of LEDs, Governments should make new rules, It is mandatory that light-based products must clearly indicate their spectrum.

This study compares two indicators between the iPhone 7 with LCD display and the latest iPhone XS Max with a 6.5-inch OLED display.

The first one is Maximum Permissible Exposure (MPE).

This is a measure of the time before the retina becomes inflamed after being exposed to the screen. The test is based on a light output of 100 lx. The MPE of iPhone 7 is 288 seconds, The MPE of the iPhone XS Max is 346 seconds, This means that OLED is safer than LCD.

The second indicator is Melatonin Suppression Sensitivity (MSS). This is a relative measurement, Used to reveal the percentage compared to pure blue light suppression, 100% MSS is similar to observing pure blue light. OLED performs better-the MSS of the iPhone 7 LCD screen is 24.6%, The MSS of the iPhone XS Max AMOLED screen is 20.1%.

In fact, Foreign studies have also shown this problem.

 The American technology media REWA published a report called “Which One Is More Harmful To Eyes? OLED or LED?” in February this year.

The conclusion of this report is: OLED can reduce blue light.

A professional independent quality inspection company called Intertek in the United Kingdom concluded that, The blue light emitted by the OLED lamp is less than 10% of the blue light emitted by the LED lamp with the same brightness and color temperature.

We can see the clues from the table below.

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Another problem is the color display.

We all know that AMOLED displays are screens made of self-luminous organic materials. It does not require LCD backlight, Because when the light beam passes through the organic material, The pixels emit light by themselves. therefore, Compared with ordinary LCD screens, OLED has display advantages such as higher contrast.
We can see the difference between the two from the picture below.

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In the simplest terms, OLED display black is pure black, , LCD is actually gray. When the LCD has a large difference in brightness of the same screen, There is the phenomenon of unclear details in the dark parts and overexposed pictures in the bright parts. Affect the visual experience, Cause visual fatigue.

Thanks to the self-luminous technology, OLED can truly display “perfect black”, And achieve infinite contrast. The ability to independently control each pixel allows every detail on the OLED TV screen to be fully displayed without being affected by the overall screen brightness.

The pure color display of OLED is actually more comfortable to the human eye. Suitable for long-term use.
3.
Choosing OLED means choosing health
“Myopia” has always been a major problem that plagues Chinese youth.

In 2017, The World Health Organization once issued a research report saying that ,There are currently as many as 600 million myopia patients in China. Almost half of China’s total population. Among them, the myopia rate of junior high school students and college students in my country has exceeded 70%. And this data is still rising year by year, The rate of myopia among young people in my country has ranked first in the world.

In contrast, The myopia rate among American teenagers is about 25%. Australia is only 1.3%, The myopia rate in Germany has also been kept below 15%.

The “Comprehensive Prevention and Control of Myopia in Children and Adolescents Implementation Plan” jointly issued by the eight departments mentioned. By 2030, The myopia rate of primary school students dropped to less than 38%. That is, in more than ten years, The myopia rate of primary school students dropped by 7.7 percentage points.

From this perspective, OLED screens are very suitable for Chinese families. With the expansion of the middle class consumer groups, People’s consumption outlook has also changed accordingly, Eye health has also become a purchasing factor that consumers pay more attention to.

 Today, more and more middle class are working hard to improve their “sense of responsibility”, The popularity of gyms and private fitness has soared, and outdoor marathons have become the mainstream lifestyle. In the management of children’s health, Eye health has also become an important link.

In the current high-end TV market, ”Eye health” has become the main consumer demand of high-end users, More families prefer to choose more healthy and eye-friendly TVs.

Aowei Cloud Network (AVC) has conducted relevant investigations specifically for high-end TV users. Data Display, Changes in the consumption environment and consumption structure, Promote the consumption concept from blindness and ostentation to individualization and quality, And quality represents high-end and healthy.

In terms of TV, The family structure of high-end TV users is mainly married with children. The proportion of newly-purchased TVs for children’s health even reached 10%.

In addition, Among the high-end products with the most user recognition, OLED TVs have won more people’s favor with a score of 8.1, Among the main reasons why users choose OLED TVs, “Healthy Eyes” accounted for 20.7%, second only to the two options of “Clear Picture Quality” and “Latest Technology”.

OLED TVs have more significant advantages in eye health,It is also the most suitable health choice for Chinese families.

This is just as the Dutch scholar Spinno’s incisive statement on health:

Keeping healthy is the responsibility of life.


Post time: Jan-23-2021