Xu Zuyan, academician of the Chinese Academy of Engineering.
In the new era and new journey, it is a key task to comprehensively promote the construction of a strong country and the great cause of national rejuvenation with Chinese-style modernization, and to realize new industrialization. The important instructions made by the general secretary on promoting new industrialization profoundly expounded the great significance, important principles and key tasks of promoting new industrialization in the new era and new journey, and pointed out the direction of progress and provided a guide for us to solidly promote new industrialization, accelerate the construction of a manufacturing power, and build a solid material and technological foundation for Chinese-style modernization.
Today's era is the age of information, and the interaction between various information system terminal equipment and people needs to be realized through information display. 80% of human information acquisition relies on vision, recording and reproduction, and the interdependent display industry is the backbone of the information industry.
The development direction of the display industry is to move towards the resolution limit of the human eye, and the goal is to obtain and reproduce high-fidelity images. Looking back on the development process of the display industry, from black and white display, color display, and digital display, it solves the problem of whether there is a problem with the image, the problem of color in the image, and the problem that the image is easy to be interfered with. At the beginning of the 21st century, laser display solved the problem of high-fidelity image reproduction, that is, the problem of ultra-high-definition image.
China's laser display industry highlights independent innovation
It is one of the key tasks of new industrialization to accelerate the improvement of industrial innovation capabilities, implement the main position of enterprises in scientific and technological innovation, strengthen demand and scenario traction, and encourage enterprises to increase investment in innovation.
The new type of industrialization is an industrialization that attaches importance to independent innovation. Independent innovation is scientific and in line with the trend of globalization. The display industry has now entered the era of ultra-high definition, and there is an international standard BT2020, including high-resolution pixels up to 4K 8K and color gamut coverage of 75More than 8%, the number of colors up to 12 bits. The principle of laser display is to use red, green and blue primary color lasers as the light source, regulate the intensity ratio of the three-color laser, the spatio-temporal distribution of intensity, and the total intensity, so as to achieve full high-fidelity reproduction, and can realize the above three elements at the same time, so laser display is the most mature route to achieve ultra-high-definition display. The laser display has high brightness, and it is easy to control the display brightness in the best range of human visual perception to ensure the high clarity, high contrast and comfort of the displayThe laser display has a narrow spectral width (5nm) to ensure that the color gamut coverage of the display image reaches 758% Ultra HD standard;The laser display has good directionality, which makes the laser display industrialization easy to control the overall architecture and realize the engineering requirements of high efficiency, ultra-light and simplicity.
Independent innovation revolves around advanced technology. The new display industry research is now carried out is two-dimensional display (plane display), and the ultra-high-definition BT2020 standard has reached the resolution limit of the human eye, that is, spatial resolution of one corner, spectral resolution of 1nm, resolution of 100 frames and seconds, field of view scale resolution of 30 ° of the upper and lower main field of view, and 60 ° of the left and right main field of view.
Independent innovation has great economic vitality. Laser display will develop into a strategic emerging industry in the country, and will reach a global market size of 450 billion US dollars and a market size of 400 billion yuan in China.
Independent innovation also serves people's lives and health. Laser display has the characteristics of good monochromaticity, good directionality and high brightness, which determines that the laser display has the characteristics of ultra-high resolution, large color gamut, large number of colors and high viewing comfort on the basis of the advantages of compatible digital display technology. The ultra-high-definition laser display has a good eye protection advantage, which has been confirmed by theoretical research and population test detection.
Independent innovation still has China's advanced characteristics. There are two modes of laser display, one is projection, which is applied by the Institute of Physics and Chemistry of the Chinese Academy of Sciences, and the team of Bi Yong and Gao Weinan took the lead in developing a prototype of three-color LD projection products. At present, there are more than 40 companies in China, such as Hangzhou Zhongke Aurora, Hisense, Changhong, etc., and the domestic sales scale will exceed more than 20 billion yuan in 2022. The other model is the flat type, which was pioneered and developed by Xu Jiangke's team of Beijing Oriental Laser Technology Company and transformed into products. The telemedicine monitoring terminal product was used by the PLA General Hospital (301 Hospital) to solve the world problem of inconsistency between telemedicine image display and clinical practice, and developed a new direction of "laser telemedicine". At present, 301 Hainan Center (Sanya) has established a laser telemedicine outpatient clinic, which is being vigorously promoted.
In the development process of the laser display industry, China has seized the opportunity. We have been independently developing laser display technology for 20 years, and now the national laser display industry practitioners have a "Chinese dream" of "Chinese watching Chinese TV", and through unity and struggle, they will definitely make due contributions to Chinese modernization.
Laser display is developing towards green and true three-dimensional
Green is a distinctive feature of the new industrialization, and it is also an important direction for the transformation and upgrading of the manufacturing industry. At present, China has entered a new stage of high-quality development, and "carbon neutrality" has become a national strategy. Laser display has the advantages of non-luminous screen, moderate picture brightness, visual comfort, low energy consumption, and the larger the screen, the more obvious the energy-saving effect, which is 50% more energy-saving than LCD TV, and is a very good green product. Therefore, the promotion and application of laser display technology is an important measure to promote green and low-carbon development.
True 3D display has always been the future display technology pursued by mankind. There are two principles of true three-dimensional display, one is the principle of optical holography, which is a kind of coherent imaging, which uses a medium to record all the optical information of an object, including the spatial and temporal distribution of wavelength, amplitude and phase, and then reproduces it with a laser. The difficulty to break through is to find a medium that can record laser coherent fringes of 5000 line pairs mm, and the second is to use ordinary light instead of laser when recording. Another true three-dimensional display is light field imaging (computational imaging), that is, recording all the three-dimensional information of the object's light wave (wavelength, intensity, etc.), and then calculating the imaging reproduction. Flat display is moving towards true three-dimensional display, which is a revolution in human display technology, and there is a long way to go
In addition to green and true three-dimensional, the development direction of laser display also includes intelligence and miniaturization. The mobile phone is a photoelectric technology system, and the addition of laser display will make the mobile phone display more advanced and clearer. The miniaturization of laser display can be carried out gradually, first adding laser display to the flat tablet, and then gradually shrinking into the mobile phone, which involves the architectural reform of laser display, promoting the mobile phone to be more intelligent, and helping the interactive development of digital technology and the real economy.
Future technology is the macro development model of all technologies, and display technology is no exception. Future technology includes two aspects: disruptive technology is discovery and new functional technology is invention. True 3D display has not yet developed into a large-scale industry, waiting for future technology to develop.
Author丨Xu Zuyan, Academician of the Chinese Academy of Engineering, Editor丨Zhu Lingzhenmei, Editor丨Maria, Producer丨Lian Xiaodong