Waseda University, Tama Art University, and National Institute for Materials Science (NIMS) have jointly developed a soft display that does not require power to maintain the display, can be freely processed into shapes, and can express analog colors.As an attempt to express this art, we have realized the development of a deciduous device that changes color "as if it bleeds" just like the natural autumn leaves.
Currently, the creation of digital art is flourishing due to the ultra-high resolution of displays such as 4k and 8K and the development of image processing technology.On the other hand, since the expression is performed on a display such as liquid crystal display or organic EL, the concept of pixels divided into a square shape and a grit shape, power is always required for display, and the color is limited to the finite state of digital. Implicit specifications of the device, such as being, noise and elimination of contingency, hinder free thinking and expression.
This time, the research group is engaged in electrochromic materials (materials that change color due to electrochemical redox) and organic / metal hybrid polymers (metal ions and organic ligands) that change color with a slight flow of electricity. We have developed an infinite-resolution fallen leaf display that naturally reproduces color changes before and after autumn leaves, using a flexible transparent electrode substrate (a new polymer synthesized by complex formation).By passing a small amount of electric current through a deciduous display with a natural shape that is worm-eaten, the color changes "to bleed" just like natural autumn leaves, and when the switch is turned off in the middle, the colored state is maintained.Furthermore, it can be returned to green by passing an electric current in the opposite direction.
In the future, by taking advantage of the characteristics of organic / metal hybrid polymer, which is non-volatile and whose color changes with a small amount of electric power, displays with free-form surfaces and three-dimensional structures, displays whose display changes due to wind power, and displays that become transparent and disappear. By expanding the concept of conventional displays, we aim to develop new developments in everyday life as well as artistic expression that goes beyond existing digital art.
