Position detection device, position detection system, and method for controlling position detection device
AssigneeSeiko Epson Corporation
InventorKeisuke HIGASHI
Life of this patent
Estimating the term…
Abstract
A projector includes: a position detection unit which detects a position pointed by a light pen (first pointer) and a position pointed by a user's finger or the like (second pointer) within a detection area; a state determination unit which determines a pointing direction of the light pen; and an invalid area setting unit which sets an invalid area where the position pointed by the second pointer is invalid, within the detection area, based on the position pointed by the light pen detected by the position detection unit and the pointing direction of the light pen determined by the state determination unit.
Claims7
A position detection device comprising:
- a position detection unit which detects a position pointed by a first pointer and a position pointed by a second pointer within a detection area;
- a direction determination unit which determines a pointing direction of the first pointer;
- and
- a setting unit which sets an invalid area where the position pointed by the second pointer is invalid, within the detection area, based on the position pointed by the first pointer detected by the position detection unit and the pointing direction of the first pointer determined by the direction determination unit.
A position detection system comprising a first pointer which emits light, a detection light emitting device which emits detection light along a detection area, and a position detection device,
- wherein the position detection device comprises:
- a position detection unit which detects a position pointed by the first pointer, based on a position of the light emitted from the first pointer within the detection area, and which detects a position pointed by a second pointer, based on a position where the second pointer reflects the detection light within the detection area;
- a direction determination unit which determines a pointing direction of the first pointer;
- and
- a setting unit which sets an invalid area where the position pointed by the second pointer is invalid, within the detection area, based on the position pointed by the first pointer detected by the position detection unit and the pointing direction of the first pointer determined by the direction determination unit.
A method for controlling a position detection device which detects a position pointed by a first pointer and a position pointed by a second pointer within a detection area, the method comprising:
- detecting the position pointed by the first pointer within the detection area;
- determining a pointing direction of the first pointer;
- and
- setting an invalid area where the position pointed by the second pointer is invalid, within the detection area, based on the position pointed by the first pointer that is detected and the pointing direction of the first pointer that is determined.
Dependencies are inferred from the claim text.