【實用娛樂app】手機搖搖棒|最夯免費app-綠色工廠好玩App

情人節，就用「手機搖搖棒」來秀出你的心意

手機搖搖棒能在空中搖出文字,炫感十足,在生日Party, KTV,或演唱會中使用,格外引人注目。

(POV Display)

藉由快速切換LED的開關,利用視覺暫留 (Persistence of vision) 的原理

原因是由視神經的反應速度造成的,其時值是二十四分之一秒。

在空中不存在的大畫面64x16的點陣上,搖出文字

物體在快速運動時,當人眼所看到的影像消失後,人眼仍能繼續保留其影像,約0.1-0.4秒左右的圖像,這種現象被稱為視覺暫留現象

影片示範:

https://www.facebook.com/video/video.php?v=2046600658703

http://www.youtube.com/watch?v=urqr5CYT2c4

http://www.youtube.com/watch?v=a6teiLSGLkM

http://v.youku.com/v_show/id_XMzIxNDU1ODcy.html

http://v.youku.com/v_show/id_XMzIxNDU4ODY0.html

What is POV Display:

A class of display device described as "POV" is one that composes an image by displaying one spatial portion at a time in rapid succession (for example, one column of pixels every few milliseconds). A 2 dimensional POV display is often accomplished by means of rapidly moving a single row of LEDs along a linear or circular path. The effect is that the image is perceived as a whole by the viewer as long as the entire path is completed during the visual persistence time of the human eye. A further effect is often to give the illusion of the image floating in mid-air.