ELECTRONIC WHITEBOARD SYSTEM

• US 20110157101A1
• Filed: 05/28/2010
• Published: 06/30/2011
• Est. Priority Date: 12/28/2009
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chang, Jen-Tsorng
• Application Number:
  US12/789,633
• Publication Number:
  US 20110157101A1
• Time in Patent Office: Days
• US Class Current: 345/179
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0386 for light pen

Abstract

An electronic whiteboard system includes a projector, at least two image capture devices, an electronic whiteboard, a light pen and a processor. The light pen includes at least two light emitting members respectively emitting different wavelengths of light. The at two image capture devices detects the corresponding wavelengths of light and transmits an image signal to the processor. The processor is connected to the projector and the at least two image capture devices, and then directs the projector to project a colored marker onto the electronic whiteboard. A color of the colored marker is controlled by the light pen.

Claims

1. An electronic whiteboard system comprising:

a projector;

at least two image capture devices;

an electronic whiteboard;

a light pen; and

a processor connected to the projector and the at least two image capture devices, wherein the light pen comprises at least two light emitting members respectively emitting different wavelengths of light, the at least two image capture devices detect the corresponding wavelengths of light and transmit an image signal to the processor, and the processor then controls the projector to project a colored marker on the electronic whiteboard, a color of the colored marker being controlled by the light pen.

2. The electronic whiteboard system of claim 1, wherein each of the at least two image capture devices comprises a lens cone, a lens group received in the lens cone and a bottom frame fixed to an end of the lens cone.

3. The electronic whiteboard system of claim 2, wherein each of the at least two image capture devices further comprises a filter fixed in an end of the bottom frame adjacent to the lens cone.

4. The electronic whiteboard system of claim 3, wherein the filter is an infrared narrow bandpass filter.

5. The electronic whiteboard system of claim 3, wherein each of the at least two image capture devices further comprises a substrate fixed to an end of the bottom frame away from the lens cone to cover the bottom frame.

6. The electronic whiteboard system of claim 5, wherein each of the at least two image capture devices further comprises an image sensor fixed on an inner surface of the substrate.

7. The electronic whiteboard system of claim 6, wherein the image sensor is a complementary metal oxide semiconductor sensor.

8. The electronic whiteboard system of claim 1, wherein the light pen further comprises a housing, a control switch fixed on an outer surface of the housing, a circuit board fixed in the housing, a battery electrically connected to the control switch and the circuit board;

two electrodes of the at least two light emitting members are electrically connected to the control switch and the circuit board.

9. The electronic whiteboard system of claim 8, wherein the at least two light emitting members are infrared light emitting diodes.

10. The electronic whiteboard system of claim 8, wherein the housing defines a through hole in an end thereof.

11. The electronic whiteboard system of claim 10, wherein the light pen further comprises a transparent film fixed in the through hole.

12. The electronic whiteboard system of claim 11, wherein the light pen further comprises a fixing plate received in the housing opposite to the transparent film.

13. The electronic whiteboard system of claim 12, wherein the fixing plate comprises a reflecting surface adjacent to the at least two light emitting members.

14. The electronic whiteboard system of claim 12, further comprising a multiplexer interconnecting the at least two image capture devices and the processor.