Smart Screen Privacy Protection

With the convenience of mobile devices and the explosive growth of mobile device holdings,the usage habits change radically,more and more people settle down to use their phone in a public environment,even handle the work matters.User's personal information,company's important document or even the payment password of user all exposed in the public places.LCD screens are most common display in recent years,which bring bigger viewing angle and clearer picture,but the content is more vulnerable to be peeped by other people.The problem of leakage of the privacy of the screen caused by shoulder surfing in public places has become more and more serious.How to effectively protect the privacy of screen contents of smart devices has become an increasingly concerned issue.At present,there are mainly three methods for the disclosure of screen privacy: change to a special privacy screen;hardware modification to achieve privacy protection,and software monitoring background.Use a special privacy protection screens requires a replacement of hardware devices,and high priced;hardware modifications requires to modify the original hardware,this method lacks of universality;software background monitoring,has a interrupt in screens,injured the owner's normal reading experience,lack of protection technology is not mature enough.In order to solve these problems,in the existing mobile devices' usage scenarios,we propose an effective privacy protection system that completely free charge,without any hardware replacement,or affect owner's reading.Based on the LCD's specific physical structure characteristic of optical heterogeneity,with the technology of font-size change,the color scheme replace,and decrease the screen brightness,make the display content become difficult to be peeped and have a good reading experience to the owner.The work of this article mainly includes four parts:First,the collection of environmental parameters: Use mobile phone's sensors and inertial units to collect and store the real-time environmental parameters of the user's current reading environment,such as reading distance,ambient brightness,whether there are peepers and other information of environment.Second,according to the impact factors of reading experience to the user's device,establish an influence model between environmental parameters and screen display reading experience.Third,when the environmental parameters change,the impact model calculates the target value of the screen display according to the metrics of reading experience,and renders and redraws the display.Fourthly,the user can establish a personalized and characterization model based on owner's specific sensitivity to the screen display factors,change the weights of the displayed influencing factors on the screen.The innovation of this article lies in the use of commercial devices,without any hardware modifications,without interrupting to the owner's reading but effectively protecting the screen privacy of mobile phone.System that completely free of charge,and use an effective screen privacy protection system without any modification.