|United States Of America||Issued Patent||10,114,238||10/30/2018||2014-129|
Being able to actively change the color of objects is highly desirable for a variety of applications, including sensing, anti-counterfeit, camouflage, jewelry and visual art. Conventional optical coating consists of one or multiple layers of thin films, relying on accumulative optical interference of the layers. However, these traditional coating methods do not provide means to actively control color.
To address this challenge, UC Berkeley researchers invented a color-controllable membrane with color tuning capability either by active actuation or passive stimulation. Colors are controllable via photonic, mechanical or electro stimulation. The active color display is promising for making artificial chameleon skin for camouflage and the color coating of visual arts. The color change ability via passive stimulation can be applied toward labeling mechanical changes at visible wavelength resolution. Other structural color applications include beam-steering devices for a fixed wavelength.
- photonic, display, color display, color sensing, anti-counterfeit, imaging, materials