Patent ID: 9706195
Date: 2017-07-11
CPC Classifications: G02B,H04N

Claim:
1. A display device comprising: an enclosure for housing a display; an image-forming optical element provided in light-transmissive fashion in an upper surface of the enclosure; a display disposed under the image-forming optical element and including a display surface inclined at a predetermined inclination angle with respect to a lower surface of the image-forming optical element; an information holding element for placement on the upper surface of the enclosure; a reader for reading information held by the information holding element in a non-contacting manner; a sensor for sensing whether an object is present the upper surface of the enclosure or not; and a controller which causes a video picture to he displayed on the display and which controls the video picture, based on signals from the reader and the sensor, wherein the controller perfonns switching between a standby state (A) and a display state (B), based on the information held by the infoniiation holding element and transmitted from the reader and an object detection signal transmitted from the sensor, Wherein the standby state (A) is a state in which, when the information holding element enters a region in which signals are readable by the reader before the information holding element comes in abutment with the upper surface of the enclosure, the reader reads individual information held by the information holding element and the controller prepares a video picture corresponding to the information holding element, based on the individual information transmitted from the reader to the controller, and wherein the display state (B) is a state in which, while the information holding element is in abutment with the upper surface of the enclosure, the controller causes the prepared video picture to be displayed on the display, based on the object detection signal transmitted from the sensor to the controller, so that a projected image of the video picture is image-formed through the image-forming optical element in a manner floating up in space over the enclosure.