TOUCH PEN

• US 20120162152A1
• Filed: 12/23/2011
• Published: 06/28/2012
• Est. Priority Date: 12/27/2010
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Original Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Inventors: JIANG, KAI-LI, FAN, SHOU-SHAN
• Application Number:
  US13/336,611
• Publication Number:
  US 20120162152A1
• Time in Patent Office: Days
• US Class Current: 345/179
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0442 using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser

Abstract

A touch pen includes a body and a head fixed on one end of the body and electrically connected with the body. The head includes a carbon nanotube composite material including a flexible polymer matrix and a plurality of carbon nanotubes dispersed in the flexible polymer matrix. The plurality of carbon nanotubes cooperatively form a conductive network.

Claims

1. A touch pen comprising:

a body; and

a head located on one end of the body and electrically connected with the body, wherein the head comprises a carbon nanotube composite material, the carbon nanotube composite material comprises a flexible polymer matrix and a plurality of carbon nanotubes dispersed in the flexible polymer matrix, and the plurality of carbon nanotubes cooperatively form a conductive network.

2. The touch pen as claimed in claim 1, wherein a weight percentage of the plurality of carbon nanotubes in the carbon nanotube composite material ranges from about 5% to about 10%.

3. The touch pen as claimed in claim 1, wherein the flexible polymer matrix comprises a material selected from the group of polydimethylsiloxane, polypropylene, poly ethyl acrylate, poly butyl acrylate, polystyrene, polybutadiene, poly acrylonitrile and combinations thereof.

4. The touch pen as claimed in claim 1, wherein at least part of the plurality of carbon nanotubes extrudes out of the flexible polymer matrix.

5. The touch pen as claimed in claim 1, wherein the body comprises metal.

6. The touch pen as claimed in claim 5, wherein the one end of the body defines a hole having an internal thread.

7. The touch pen as claimed in claim 6, wherein the head is fixed on the one end of the body corresponding to the internal thread.

8. A touch pen comprising:

a body; and

a head fixed on one end of the body and electrically connected with the body, wherein the head comprises a contact layer and a supporter having an outer surface, the contact layer is located on the outer surface, the contact layer is made of a carbon nanotube composite material, the carbon nanotube composite material comprises a flexible polymer matrix and a plurality of carbon nanotubes dispersed in the flexible polymer matrix, and the plurality of carbon nanotubes cooperatively form a conductive network.

9. The touch pen as claimed in claim 8, wherein a weight percentage of the plurality of carbon nanotubes in the carbon nanotube composite material ranges from about 5% to about 10%.

10. The touch pen as claimed in claim 8, wherein the flexible polymer matrix comprises a material selected from the group of polydimethylsiloxane, polypropylene, poly ethyl acrylate, poly butyl acrylate, polystyrene, polybutadiene, poly acrylonitrile and combinations thereof.

11. The touch pen as claimed in claim 8, wherein at least part of the plurality of carbon nanotubes extrudes out of the flexible polymer matrix.

12. The touch pen as claimed in claim 8, wherein the contact layer is a ribbon-shaped layer and helically wraps around the supporter.

13. The touch pen as claimed in claim 8, wherein the body comprises metal.

14. The touch pen as claimed in claim 13, wherein the one end of the body defines a hole having an internal thread.

15. The touch pen as claimed in claim 14, wherein the head is fixed on the one end of the body corresponding to the internal thread.

16. The touch pen as claimed in claim 15, wherein the supporter comprises a fixing section and a main section, the fixing section is fixed on the one end of the body.

17. The touch pen as claimed in claim 16, wherein the contact layer is coated on the main section.

18. The touch pen as claimed in claim 16, wherein the supporter comprises a flexible polymer material selected from the group consisting of silicone elastomer, poly methyl methacrylate, polyurethane, epoxy resin, polypropylene acid ethyl ester, acrylic acid ester, polystyrene, polybutadiene, polyacrylonitrile, polyaniline, polypyrrole, polythiophene and combinations thereof.

19. The touch pen as claimed in claim 16, wherein an external thread is defined on the fixing section.