TOUCH INPUT DEVICE AND METHOD OF ACQUIRING CONTACT LOCATION AND INTENSITY OF FORCE USING THE SAME

• US 20100123678A1
• Filed: 01/09/2009
• Published: 05/20/2010
• Est. Priority Date: 11/14/2008
• Status: Abandoned Application

• Current Assignee: Korea Research Institute of Standards and Science
• Original Assignee: Korea Research Institute of Standards and Science
• Inventors: Choi, Jae-Hyuk, Park, Yon Kyu, Kim, Jong Ho, Kim, Min Seok, Kang, Dae Im
• Application Number:
  US12/351,363
• Publication Number:
  US 20100123678A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

The present invention relates to a touch input device and a method of acquiring a contact location and the intensity of force using the same. The touch input device may include a touch panel with which a pointing object is brought in contact, a location-processing unit for receiving a signal regarding a contact location from the touch panel and processing information about the contact location of the pointing object, an intensity-processing unit for receiving a signal regarding a change in capacitance between an upper electrode layer of the touch panel and the pointing object from the touch panel and processing information about an intensity of force of the pointing object, and a switching unit for selectively electrically connecting the location-processing unit and the intensity-processing unit to the touch panel, so that information about the location and the intensity of force, of the pointing object, can be acquired.

Claims

1. A touch input device, comprising:

a touch panel with which a pointing object is brought in contact;

a location-processing unit for receiving a signal regarding a contact location from the touch panel and processing information about the contact location of the pointing object;

an intensity-processing unit for receiving a signal regarding a change in capacitance between an upper electrode layer of the touch panel and the pointing object from the touch panel and processing information about an intensity of force of the pointing object; and

a switching unit for selectively electrically connecting the location-processing unit and the intensity-processing unit to the touch panel, so that information about the location and the intensity of force, of the pointing object, can be acquired.

2. The touch input apparatus according to claim 1,

the touch panel is a contact resistance type touch panel of an array form, comprising an upper electrode layer having a plurality of upper electrode bands formed therein in parallel, and a lower electrode layer having a plurality of lower electrode bands formed in a direction to cross the upper electrode bands, and

the touch input device further comprises an auxiliary switching unit for electrically connecting the plurality of upper electrode bands of the upper electrode layer in such a way as to form one electrode, so that information about the location and the intensity of force, of the pointing object, can be acquired.

3. The touch input device of claim 2, wherein the auxiliary switching unit switches over the upper electrode layer and the lower electrode layer so that the upper electrode layer and the lower electrode layer are electrically connected to each other in order to form one electrode.

4. The touch input device of claim 1 wherein:

the touch panel is a capacitive type touch panel of an array form, comprising an upper electrode layer having a plurality of upper electrode bands formed therein in parallel, and a lower electrode layer having a plurality of lower electrode bands formed in a direction to cross the upper electrode bands, and

the touch input device further comprises an auxiliary switching unit for electrically connecting the plurality of upper electrode bands of the upper electrode layer in such a way as to form one electrode, so that information about the location and the intensity of force, of the pointing object, can be acquired.

5. The touch input device of claim 4, wherein the auxiliary switching unit switches over the upper electrode layer and the lower electrode layer so that the upper electrode layer and the lower electrode layer are electrically connected to each other in order to form one electrode.

6. The touch input device of claim 1, wherein the switching unit operates while the pointing object is brought in contact with the touch panel.

7. The touch input device of claim 1, further comprising a contact detection unit for periodically determining whether the pointing object is touched on the touch panel.

8. The touch input device of claim 7, wherein the contact detection unit determines whether the pointing object is brought in contact with the touch panel by detecting a change in capacitance between the touch panel and the pointing object.

9. The touch input device of claim 1, wherein the intensity-processing unit previously stores data regarding intensities of force of the pointing object, which correspond to the change in capacitance.

10. A method of acquiring a contact location and an intensity of force, the method comprising:

a step of generating a signal, regarding a location of a pointing object that is touched on a touch panel, using the touch panel;

a step of processing information about the contact location of the pointing object based on the signal, regarding the location, using a location-processing unit;

a first switching step of switching an electrical connection state between the touch panel and the location-processing unit to an electrical connection state between the touch panel and an intensity-processing unit using a switching unit;

a step of changing capacitance between an upper layer electrode layer of the touch panel and the pointing object according to the contact of the pointing object; and

a step of processing information about an intensity of contacting force of the pointing object based on the capacitance using the intensity-processing unit, so that information about the location and the intensity of force, of the pointing object, can be acquired.

11. The method as claimed in claim 10, further comprising, before the step of generating the signal regarding the location, the step of determining whether the pointing object has been touched on the touch panel.

12. The method as claimed in claim 11, wherein the step of determining whether the pointing object has been touched on the touch panel is performed by detecting the change in capacitance between the upper electrode layer of the touch panel and the pointing object.

13. The method as claimed in claim 12, wherein whether the pointing object has been touched on the touch panel is determined based on a threshold value of the capacitance.

14. The method as claimed in claim 10, further comprising a second switching step of switching the electrical connection state between the touch panel and the intensity-processing unit to the electrical connection state between the touch panel and the location-processing unit using the switching unit.

15. The method as claimed in claim 14, wherein, after the second switching step is performed, the step of generating the signal regarding the location is performed, so that an execution loop is formed.

16. The method as claimed in claim 10, wherein:

data regarding intensities of force of the pointing object, which correspond to the change in capacitance, is stored in the intensity-processing unit, and

the step of processing the information about the intensity of force includes processing the information about the intensity of force of the pointing object by searching for the data stored in the intensity-processing unit.

17. A method of acquiring a contact location and an intensity of force, the method comprising:

a step of changing capacitance between an upper electrode layer of a touch panel and a pointing object through a contact of the pointing object;

a step of processing information about an intensity of contacting force of the pointing object based on the change in capacitance using an intensity-processing unit;

a first switching step of switching an electrical connection state between the touch panel and the intensity-processing unit to an electrical connection state between the touch panel and a location-processing unit using a switching unit;

a step of generating a signal regarding a location of the pointing object using the touch panel; and

a step of processing information about the contact location of the pointing object based on the signal, regarding the location, using the location-processing unit, so that information about the location and the intensity of force, of the pointing object, can be acquired.

18. The method as claimed in claim 17, further comprising, before the step of changing the capacitance, the step of determining whether the pointing object has been touched on the touch panel.

19. The method as claimed in claim 18, wherein the step of determining whether the pointing object has been touched on the touch panel is performed by detecting the change in capacitance between the upper electrode layer of the touch panel and the pointing object.

20. The method as claimed in claim 19, wherein the step of determining whether the pointing object has been touched on the touch panel is performed by determining whether the pointing object has been touched on the touch panel based on a threshold value of the capacitance.

21. The method as claimed in claim 17, further comprising a second switching step of switching the electrical connection state between the touch panel and the location-processing unit to the electrical connection state between the touch panel and the intensity-processing unit using the switching unit.

22. The method as claimed in claim 21, wherein, after the second switching step is performed, the step of changing the capacitance is performed, so an execution loop is formed.

23. The method as claimed in claim 17, wherein:

data regarding intensities of force of the pointing object, which correspond to the change in capacitance, is stored in the intensity-processing unit, and

the step of processing the information about the intensity of force includes processing the information about the intensity of force of the pointing object by searching for the data stored in the intensity-processing unit.

wherein the adhesive layer comprises a thermosetting adhesive consisting essentially of acryl, urethane, and phenol resin, and

the metal surface material is any one selected from a stainless steel sheet, a copper plate, or an aluminum plate.