(CNN) BMW Flow 电动 SUV 概念车只需按一下按钮即可改变色调，从白色变为灰色或黑色，然后瞬间又变回原状。虽然它不能超越灰色阴影，即使如此，它也缺乏真正汽车油漆的微妙和深度，但效果令人吃惊。
这个技巧根本不是用油漆完成的，而是用特殊形状的包裹切割来适应 SUV 的车身面板。包装采用与电子阅读器相同的电子墨水技术。彩色面板被精确切割以匹配 SUV 车身面板的形状，然后将电线连接到每个部分。
面板表面有数百万个微小的胶囊，每个胶囊含有带负电的白色颜料和带正电的黑色颜料。电流将一种或另一种颜料带到表面，产生不同的色调。颜色变化完成后，面板将保持其色调，而无需再充电。
SUV 可以全部涂上一种色调，也可以在不同部位涂上不同的色调。甚至轮子也可以改变颜色。
BMW 设计主管 Adrian van Hooydonk 将 BMW iX Flow 概念描述为“一项先进的研究和设计项目”。
This color-changing concept BMW will mess with your head
(CNN)The BMW Flow electric SUV concept can change hues at the press of a button, going from white to gray or black and back again in moments. While it can't go beyond shades of gray and, even at that, it lacks the subtlety and depth of real car paint, the effect is startling.
The trick isn't done with paint at all, but with specially formed wrapping cut to fit the SUV's body panels. The wrapping has the same sort of e-ink technology used in electronic readers. The colored panels were cut precisely to match the shape of the SUV's body panels and then electric wiring is attached to each section.
The panel surfaces have millions of tiny capsules, each one containing negatively charged white pigments and positively charged black pigments. Electric currents bring one pigment or the other to the surface creating the different shades. Once the color change is completed, the panels keep their tone without needing any more electrical charge.
The SUV can be colored all one shade or different shades in different parts. Even the wheels can change colors.
Adrian van Hooydonk, BMW's head of design, described the BMW iX Flow concept as "an advanced research and design project."
