Patent ID: 11885984
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. An aerial image display device comprising:
a housing including a first viewing direction facing inward from an outside of one end and a second viewing direction facing inward from an outside of an other end;
a first display unit disposed to be spaced from a top surface on a side of the one end of the housing at a first interval with a display surface facing the housing;
a second display unit disposed to be spaced from a top surface on a side of the other end of the housing at a second interval with a display surface facing the housing;
a first optical element having a plane, a size of which is larger than a size of the first display unit in plan view, disposed to be inclined toward the side of the one end, and configured to transmit a portion of light emitted from the first display unit and reflect a portion of the light;
a second optical element having a plane, a size of which is larger than a size of the second display unit in plan view, disposed to be inclined toward the side of the other end, and configured to transmit a portion of light emitted from the second display unit and reflect a portion of the light; and
a third optical element disposed outside a lower surface of the housing, and configured to transmit a portion of the light emitted from the first display unit and the second display unit and reflect a portion of the light;
wherein sizes of the first interval and the second interval are different.