Patent ID: 7336289

Claim:
A projection type display apparatus that projects video onto a screen, comprising: a liquid crystal panel using polymer-dispersed liquid crystal that disperses light when a voltage is applied and that transmits light when a voltage is not applied, being attached to a body of the apparatus as a screen, wherein said liquid crystal panel comprises: a first group of electrodes including a first predetermined number of electrodes; and a second group of electrodes including a second predetermined number of electrodes; wherein said first group of electrodes is arranged in a direction perpendicular to a direction in which said second group of electrodes is arranged; wherein the video output from said body of the apparatus is projected onto said screen from the front side, and wherein each of a four corners of a plurality of aspect ratios of video are located on the circumference of an ellipse shaped screen, a location of each of the four corners being a function of the aspect ratio, and wherein said screen transmits light in an area of the screen where said video is not projected.