公开(公告)号：US20210173965A1

公开(公告)日：2021-06-10

申请号：US16704385

申请日：2019-12-05

申请人： Tzu-Lan Hsu ,  Yu-Ting Pen

发明人： Tzu-Lan Hsu ,  Yu-Ting Pen

IPC分类号： G06F21/84 ,  H04N5/72

摘要： A hanging type switchable anti-peeping device, removably hung on a displaying screen for an anti-peeping effect, includes two conductive layers, a displaying medium layer, and a drive unit. The displaying medium layer is between the conductive layers. The drive unit is electrically connected with the conductive layers. The drive unit provides a driving voltage between the conductive layers for driving the displaying medium layer to change the light permeability. At least one conductive layer has hollow portions arranged at intervals, forming a grille structure with a plurality of division portions. With the hollow portions arranged at intervals, during the lightening of the display screen, the transmittance of the hollow portions is higher than that of the division portions, improving the transmittance of the conductive layer. Thus, with the anti-peeping device hung on the displaying screen, the screen brightness would not decrease.