DISPLAY DEVICE, CONTROL METHOD OF DISPLAY DEVICE AND PROGRAM

• US 20130050072A1
• Filed: 08/06/2012
• Published: 02/28/2013
• Est. Priority Date: 08/25/2011
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: NATORI, Takashi
• Granted Patent: US 9,182,832 B2
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: G06F 3/0308 comprising a plurality of distinctive and separately oriented light emitters or reflectors associated to the pointing device, e.g. remote cursor controller with distinct and separately oriented LEDs at the tip whose radiations are captured by a photo-detector associated to the screen
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A display device includes a display unit to display a video screen on a display surface, a information detection unit to detect position information of a plurality of detection points arranged on a stationery tool imitating a shape of a stationery, and identification information added to the plurality of detection points respectively and different among the plurality of detection points, and an angle determination unit to determine a rotation angle of the stationery tool on the display surface based on the position information of the plural detection points.

Claims

1. A display device comprising:

a display unit to display a video screen on a display surface;

a information detection unit to detect position information of a plurality of detection points arranged on a stationery tool imitating a shape of a stationery, and identification information added to the plurality of detection points respectively and different among the plurality of detection points; and

an angle determination unit to determine a rotation angle of the stationery tool on the display surface based on the position information of the plurality of detection points.

2. The display device according to claim 1, further comprising:

a display control unit to display an object corresponding to the stationery tool, wherein

the display control unit rotates and displays the object based on the determined rotation angle of the stationery tool.

3. The display device according to claim 2, wherein

the stationery is one of a ruler and a protractor.

4. The display device according to claim 2, further comprising:

a type determination unit to determine a type of the stationery tool based on a combination of the detected identification information of the plurality of detection points, wherein

the display control unit displays the object corresponding to the type determined by the type determination unit.

5. The display device according to claim 2, wherein

the information detection unit detects operation information of operator disposed in the stationery tool, and

the display control unit changes a size and/or a color of the object based on the detected operation information.

6. The display device according to claim 2, wherein

the display control unit displays a rotational locus of the object when the object is rotated.

7. The display device according to claim 1, wherein

the display surface is a projection surface, and

the display unit projects the video screen onto the projection surface.

10. The display device according to claim 6, wherein

the information detection unit detects operation information of operator disposed in the stationery tool, and

the display control unit erases the rotational locus based on the detected operation information.

8. A control method of a display device to display a video screen on a display surface, comprising:

detecting position information of a plurality of detection points arranged on a stationery tool imitating a shape of a stationery, and identification information added to the plurality of detection points respectively and different among the plurality of detection points;

determining a rotation angle of the stationery tool on the display surface based on the position information of the plurality of detection points; and

displaying an object corresponding to the stationery tool on the video screen, wherein

the object is rotated and displayed based on the determined rotation angle of the stationery tool.

9. A computer readable storage medium storing a program to cause a computer to execute the control method of the display device according to claim 8.