Patent ID: 8836671

Claim:
A display device comprising: a screen on which an image is displayed; and a position detection device including a light emitting section adapted to emit an irradiation light beam along the screen, a plurality of light receiving sections adapted to receive a reflected light beam caused by an object reflecting the irradiation light beam, the plurality of light receiving sections having a proximal end light receiver and a distal end light receiver, and a detection section adapted to detect position information of the object based on a light reception result of the plurality of light receiving sections, wherein the plurality of light receiving sections are linearly arranged along a first direction perpendicular to the screen, each of the plurality of light receiving sections is located apart from the screen with a different distance between the screen and each of the plurality of light receiving sections, the proximal end light receiver is located closer to the screen than the distal end light receiver, a first detection range in the first direction from which the distal end light receiver receives the reflected light beam is larger than a second detection range in the first direction from which the proximal end light receiver receives the reflected light beam, the first detection range is not overlapped with the second detection range in the first direction, and the position detection device has detection accuracy of the position information of the object varying in accordance with a position of the object in the first direction.