Apple的保護隱私專利

由於行動通訊的技術日益普及，人們已經習慣隨時可以上網工作或查詢資料...，因此，常常可以看到有人坐在街頭，全神貫注的盯著NB螢幕看。
當你低著頭認真工作的時候，有沒有想過路人甲可能會看到你的公司機密資料？雖然目前市面上已推出螢幕保護貼，要在一定視角才能看的到螢幕內容。
Apple為此亦開發一個新技術，透過兩層面板材質來改變螢幕光線投射角度，讓使用視角可調整變窄，除了從正面直視才能清楚看見顯示內容，而無法從側面偷窺。

US20110116017
Title : SYSTEMS AND METHODS FOR ELECTRONICALLY CONTROLLING THE VIEWING ANGLE OF A DISPLAY
Filng Date : 2009.11.19.
Application Date : 2011.5.19.
Abstract :
Systems and methods for electronically controlling the viewing angle of a display using liquid crystal optical elements are provided. Each liquid crystal optical element may be associated with a respective scattering module and may selectively steer a device generated light beam to one of two or more scattering regions of its associated scattering module. When a scattering region receives a steered light beam, the steered light beam may be scattered into a viewing cone having at least one viewing angle defined by a characteristic of that scatter region. Each liquid crystal optical element may be made from one or more suitable liquid crystal materials that can be controlled electronically to vary the effective index of refraction of one or more different regions of the liquid crystal optical element, thereby steering incoming light towards a particular one of two or more scattering regions of an associated scattering module.