Ecordia Official Website

On August 2nd, the “2019 Seminar on Key Parameter Measurement Methods and Evaluation Standards for Smartphone Display” jointly organized by Ecordia and National Institute of Metrology，China was held in Beijing.

Teng Junheng, Vice President of National Institute of Metrology，China, Liao Zhiliang, Chairman of Ecordia, Lin Yandong, Director of Optics and Laser Metrology Institute, Dr. Chen Chi, Deputy Director of Radiation/Color Office，Ecordia CTO Wang Daoning,Ecordia Dr. Li Kun and other speakers attended the meeting as a guest speaker.

The conference set three themes of "display optical metrology", "performance-gamut", and "health-blue light". Industry experts and scholars and enterprise technology experts speak out and discuss the formation of standards and methods for Display, with the aim of promoting the orderly and rapid development of the industry.

Health risks 

The screen is the first ring of contact between the smartphone and the user. The performance of the screen (Display Performance) plays an important role in the user's perception. The brightness of the screen affects the user's reading experience, and the color saturation of the screen affects the effect of the photo and the image.

From the era of the original machine with only 1 inch screen, to the era of 6-inch full-screen smart phone, the mobile phone screen has undergone revolutions again and again. Whether in the screen size, screen ratio or display technology, there have been earth-shaking changes.

It can be said that mobile phones have become the most important "organs" of people.

"2019 China Network Audiovisual Development Research Report" shows that in December 2018, Chinese netizens used their mobile phones to access the Internet for 5.69 hours per day, an increase of one hour from 2017. A number of studies have shown that if you take the time to watch the bad habits of electronic products such as TV, people's physical and mental health will be hurt to varying degrees, and even increase the risk of premature death.

However, as people become more and more "sinking" on smartphones, the impact of mobile phone screens on human health has begun to become the focus of many people. The quality and performance of mobile phone displays have also begun to be valued by more and more consumers and manufacturers, and people are beginning to pay attention to the optical radiation safety and health effects of mobile phone displays.

Whether the screen of the mobile phone is eye-catching depends on the display technology used on the screen. For example, the brightness of the mobile phone display and the ambient light contrast are indicators of the reading of the mobile phone display under ambient light; the color gamut is the breadth of the display color. These all represent the range that mobile phones can reach.

Display technology feast

Test and measurement technology and instrumentation is an emerging discipline involving mathematics, physics, precision machinery, sensor technology, computer automatic control technology, information and communication technology.

Teng Junheng, vice president of National Institute of Metrology，China, said in his opening speech that measurement research is not limited to academic research in laboratories, but also provides a standard for the industry from the perspective of consumers. At present, metrology research is moving towards industrialization, and the ultimate goal is to guide consumption.

The color gamut is the breadth of the color of the display, representing the range of expressive power that the phone can achieve. In this "Display Technology Feast", Ecordia CTO Wang Daoning gave a speech on the color gamut of mobile phones in the "performance-gamut" topic.

Blu-ray is a key factor affecting the health of users.

Ecordia, Dr. Li Kun mentioned at the conference that due to the short wavelength of blue light, high energy and strong penetrating power, it can penetrate the lens and reach the retina, causing atrophy or even death of retinal pigment epithelial cells to inhibit the secretion of melatonin. May cause macular cell disease. At the same time, blue light will inhibit melanin, which may result in poor sleep quality or even difficulty falling asleep. In addition, blue light can cause the eyeball to be in a state of tension for a long time, which can cause visual fatigue and may cause people to have nearsightedness.

Regarding the Blu-ray evaluation program for mobile phone displays, Dr. Li Kun said that it is more suitable to use the standard T/CVIA-02-2017 test method considering the pupil correlation and brightness correlation and the actual blue-light weighted damage characteristics.

In addition, the contrast between brightness and ambient light is an indicator of the reading of the mobile phone display under ambient light. Today, the stroboscopic problem is common in mobile phone screens. In the topic of "display optical metrology", Dr. Chen Chi from National Institute of Metrology，China also published his own opinions.

Opportunity and responsibility

In the global arena, imaging technology has begun to be widely used in a variety of smart terminals, and smart phones are the forerunners and masters of image technology innovation and change. The world is rapidly entering the era of Internet of Everything. The formation of standards and methods of Display is an opportunity and a responsibility for us.

As one of the organizers of the conference, Ecordia focuses on artificial intelligence and 5G networks. Based on machine-aware technology and artificial intelligence technology, the company focuses on intelligent imaging, intelligent voice and intelligent network, and has landed on intelligent terminals, autonomous driving, intelligent manufacturing, Internet of Things, smart cities and other full scenarios.

It is reported that Ecordia has established R&D centers in Dalian, Malmö, Sweden and Yokohama, Japan. Three laboratories such as AI digital imaging laboratory, AI speech quantitative measurement laboratory and intelligent communication simulation network laboratory have been constructed. What is more worth mentioning is that in April this year, Ecordia and Nokia Bell jointly established the first private 5G+AI laboratory in China.

Founded in 1955,  National Institute of Metrology，China (NIMC), under the State Administration of Market Supervision, is the country's highest measurement science research center and national legal measurement technology organization, and is a social welfare research unit.

Liao Zhiliang, Chairman of Ecordia, said in the meeting, "Chinese companies have made great progress in the field of OLED. Mobile phones are the most exposed components and the most frequently accessed components. For the mobile phone industry, now is the industry. Speed up the opportunity to lay out the track."

Liao Zhiliang said that mobile phone metering research is moving towards industrialization. The "2019 Seminar on Key Parameter Measurement Methods and Evaluation Standards for Smartphone Display" serves as a bridge between academics and industry. It invites major mobile phone manufacturers and experts and scholars from the industry to participate in the survey. To establish viable standards for the industry.

With the development of full-screen mobile phones and folding smart phones, where will mobile phone screen technology go in the future? What are the amazing products that display technology will bring us? More importantly, in the game between human and mobile phone display, how to achieve a balance between technology and health is the topic that we need to continue to explore in the future.