Color-conversion displays
Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS
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This review paper includes the following information: types of color conversion methods, color conversion materials, patterning process, and performance improvement strategies.
view moreCredit: by Guijun Li, Man-Chun Tseng, Yu Chen, Fion Sze-Yan Yeung, Hangyu He, Yuechu Cheng, Junhu Cai, Enguo Chen, Hoi-Sing Kwok
Display technology has become prominent and ubiquitous in our daily life, with widespread applications in augmented reality(AR)/virtual reality(VR) devices, smartphones, tablets, monitors, TVs, etc. In displays, the increasing demand for high-quality color representation is closely tied to the rising visual expectations of users. Color presentation in displays is generally reproduced by mixing red, green, and blue color primaries through two ways: RGB tri-color independent luminescence, and the utilization of a blue excitation light source combined with a color conversion process. The later one, which is also named as color conversion, offers an alternative approach to color reproduction by utilizing high-energy blue light to generate red and green light, enabling full-color representation.
In a review paper published in Light: Science & Applications, a team of scientists, led by Professor Hoi-sing Kwok from State Key Laboratory of Advanced Displays and Optoelectronics Technologies,the Hong Kong University of Science and Technology, Professor Enguo Chen from National and Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, and Professor Guijun LI from Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, and co-workers have provided a comprehensive review of color-conversion displays, covering types of color conversion in displays, color conversion materials (CCMs), patterning processes.
“Color-conversion displays have become a significant technology in the display industry market today, they offer advantages such as high brightness, wide color gamut, improved contrast ratio, and simplified fabrication processes. These advancements have reinvigorated various display technologies and are driving the introduction of new LCD, OLED, and Micro-LED display products.” they said.
“Currently, color-conversion LCDs have reached maturity in the market. However, there is still a need for advancements in terms of high resolution, low cost, and high reliability. Extensive research is currently focused on color conversion Micro-LED displays, as this approach is believed to be a feasible pathway for commercializing this emerging display technology.” They added.
“Substantial further research into industry-compatible large-scale patterning, proper packing, and encapsulation is crucial to enable the development of commercial products in this field.” the scientists forecast.
Figure 2 | Schematic structures and spectral features of color-conversion display.
(a) Schematic configuration of the monolithic full color Micro-LED and (b) the EL spectra of the GaN-based blue micro-LEDs, the emission spectrum of the green and red QDs. (c) A schematic illustration of the architecture for the color conversion OLED display panel. (d) Schematic definition of optical channels for QD CCM.
Credit
by Guijun Li, Man-Chun Tseng, Yu Chen, Fion Sze-Yan Yeung, Hangyu He, Yuechu Cheng, Junhu Cai, Enguo Chen, Hoi-Sing Kwok
Article Title
Color-Conversion Displays: Current Status and Future Outlook.
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