通过在间隔像素上叠加一层微观遮罩结构，这些 OLED 像素的发光角度会大幅缩窄至正前方约 45° 的范围内，从而形成一片「窄角发光像素」：
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Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.