Schematic of display development (IMAGE)
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Technically, there are different routes for the realization of flexibility. 1) Physical flexibility: any rigid material that is extremely thin or has a very small diameter can be flexible. 2) Structural flexibility: for example, the wire-connecting fractal and spring configuration can provide macroscopic flexibility for the rigid chip. 3) Intrinsic flexibility: the materials in this device have flexible and stretchable nature. Different from the flexible and stretchable devices, the intrinsically flexible displays should simultaneously satisfy three critical requirements: large elastic deformation, small bending radius below 0.5 mm, and high stretching strain above 25%, which decides whether they can be subsequently conformed, folded, or rolled. With these three conditions, intrinsically flexible displays can change the perception of information that frequently appears in almost all aspects of our lives.
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