INTERACTIVE SYSTEM, CONTROL METHOD FOR INTERACTIVE SYSTEM, AND PROJECTOR

• US 20150324054A1
• Filed: 09/13/2013
• Published: 11/12/2015
• Est. Priority Date: 09/18/2012
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: KOBAYASHI, Yasuyuki, KOYAMA, Takaaki, OTSUKI, Nobuyuki, HORIGUCHI, Masahiro, KARASAWA, Yukihiro
• Granted Patent: US 9,632,616 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0304 Detection arrangements using opto-electronic means constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042
• CPC Class Codes: G06F 3/03542 Light pens for emitting or receiving light
• CPC Class Codes: G06F 3/04162 for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386
• CPC Class Codes: H04B 10/1141 One-way transmission

Abstract

An interactive system includes a transmitter (light-emitting pen) configured to transmit an optical signal and a projector. The projector includes a signal-intensity setting unit in which intensity information of a synchronization signal is set, a signal-intensity control unit (light-emission control unit) configured to control the intensity of the synchronization signal on the basis of the setting of the signal-intensity setting unit, a synchronization-signal transmitting unit (infrared-light emitting unit) configured to transmit the synchronization signal, and an image pickup unit configured to pick up an image of the optical signal transmitted from the transmitter. The transmitter includes a receiving unit (pen reception unit) configured to receive the synchronization signal and an optical-signal transmitting unit (pen control unit and a light-emitting diode) configured to transmit the optical signal in synchronization with the synchronization signal received by the receiving unit.

Claims

1. An interactive system comprising:

a transmitter configured to transmit an optical signal; and

a projector,

the projector including;

a signal-intensity setting unit in which intensity information of a synchronization signal is set;

a signal-intensity control unit configured to control intensity of the synchronization signal on the basis of the setting of the signal-intensity setting unit;

a synchronization-signal transmitting unit configured to transmit the synchronization signal; and

an image pickup unit configured to pick up an image of the optical signal transmitted from the transmitter, and

the transmitter including;

a receiving unit configured to receive the synchronization signal; and

an optical-signal transmitting unit configured to transmit the optical signal in synchronization with the synchronization signal received by the receiving unit.

2. The interactive system according to claim 1, wherein

the projector further includes a synchronization-signal receiving unit configured to receive the synchronization signal, and

when the synchronization-signal receiving unit receives a second synchronization signal from another projector, the synchronization-signal transmitting unit transmits the synchronization signal in synchronization with the second synchronization signal.

3. The interactive system according to claim 1, wherein

the synchronization-signal transmitting unit includes an infrared-light emitting diode, and

the synchronization signal transmitted by the synchronization-signal transmitting unit is an infrared signal.

4. The interactive system according to claim 3, wherein

the synchronization-signal transmitting unit includes a plurality of the infrared-light emitting diodes, and

the signal-intensity control unit changes the number of emitted lights of the plurality of infrared-light emitting diodes to control the intensity of the synchronization signal.

5. The interactive system according to claim 1, wherein the projector further includes:

an operation receiving unit configured to receive predetermined operation; and

a control unit configured to set, when the operation receiving unit receives the predetermined operation, intensity information of the synchronization signal based on the predetermined operation in the signal-intensity setting unit.

6. A control method for an interactive system including a transmitter configured to transmit an optical signal and a projector including a signal-intensity setting unit in which intensity information of a synchronization signal is set,

the method comprising:

a signal-intensity control step of the projector controlling intensity of the synchronization signal on the basis of the setting of the signal-intensity setting unit;

a synchronization-signal transmitting step of the projector transmitting the synchronization signal;

an image pickup step of the projector picking up an image of the optical signal transmitted from the transmitter;

a receiving step of the transmitter receiving the synchronization signal; and

an optical-signal transmitting step of the transmitter transmitting the optical signal in synchronization with the synchronization signal received by the receiving step.

7. A projector comprising:

a signal-intensity setting unit in which intensity information of a synchronization signal is set;

a signal-intensity control unit configured to control the intensity of the synchronization signal on the basis of the setting of the signal-intensity setting unit; and

a synchronization-signal transmitting unit configured to transmit the synchronization signal.