公开(公告)号：US3592527A

公开(公告)日：1971-07-13

申请号：US3592527D

申请日：1969-11-12

申请人： GARY H CONNERS ,  MAUER PAUL B

发明人： CONNERS GARY H ,  MAUER PAUL B

IPC分类号： G02F1/135 ,  G02F1/28

CPC分类号： G02F1/135

摘要： A display device utilizes a liquid crystal in a layered structure as a display screen. This structure includes in order a first transparent electrode, a photoconductive layer, a specular conductive mosaic layer, a liquid crystal layer and a second transparent electrode. The electrodes are connected to a DC source to provide an electric field therebetween. A radiation pattern to be displayed, is projected onto the photoconductive material through the first electrode rendering the photoconductive material conductive in exposed areas to cause a change in the degree of transparency of the liquid crystal film to form an image corresponding to the radiation pattern. This image can be viewed through the first electrode by ambient or artificial light reflected from the specular mosaic layer. To avoid undesirable reflections, a black background or a circular polarizer may be used. If a nematic liquid crystal is used, the display is erased when the electric field is removed, whereas if a mixture of nematic and cholesteric materials is used, the image remains on the liquid crystal for a period of time after removal of the electric field.