Touch Display Device and Method of Determining Touch Mode Thereof

• US 20090109192A1
• Filed: 09/30/2008
• Published: 04/30/2009
• Est. Priority Date: 10/30/2007
• Status: Abandoned Application

• Current Assignee: ASUSTek Computer, Inc.
• Original Assignee: ASUSTek Computer, Inc.
• Inventors: Liu, Kuan-Lin, Lin, Chu-Hui, Hsieh, Ming-Chih
• Application Number:
  US12/241,161
• Publication Number:
  US 20090109192A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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 display device and a method of determining touch mode thereof. The touch display device comprises a control module, a resistance touch panel, and a measuring element. The resistance touch panel comprises a first conductive layer and a second conductive layer. The method comprises: pressing the first conductive layer to contact the second conductive layer; measuring the voltage of the second conductive layer to obtain a first voltage value and a second voltage value; activating a touch pen operation mode if a difference between the first voltage value and the second voltage value is smaller than a predicted error value; and activating a finger operation mode if the difference between the first voltage value and the second voltage value is larger than the predicted error value.

Claims

1. A touch display device capable of being operated under a touch pen operation mode or a finger operation mode comprising:

a resistance touch panel comprising;

a first conductive layer having a uniform electric field; and

a second conductive layer having a first measuring electrode and a second measuring electrode, the first conductive layer being capable of contacting the second conductive layer by pressing with an input object; and

a control module electrically connected to the first measuring electrode and the second measuring electrode, the control module comprising a measuring element for measuring the voltage of the first measuring electrode and the second measuring electrode;

wherein when the first conductive layer contacting the second conductive layer, the measuring element obtains a first voltage value and a second voltage value by measuring the voltage of the first measuring electrode and the second measuring electrode respectively, and the touch pen operation mode is activated if a difference between the first voltage value and the second voltage value is smaller than a predicted error value.

2. The touch display device as claimed in claim 1 further comprising a switch circuit electrically connected to the control module, the control module is used to control the switch circuit for switching the measuring element to measure the voltage of the first measuring electrode or the second measuring electrode.

3. The touch display device as claimed in claim 1, wherein the control module further comprises a switch circuit for switching the measuring element to measure the voltage of the first measuring electrode or the second measuring electrode.

4. The touch display device as claimed in claim 1, wherein the first conductive layer further comprises a first electrode and a second electrode, the first electrode electrically connected to a power source, and the second electrode electrically connected to a ground in order to have a different voltage between the first electrode and the second electrode and form the uniform electric field.

5. The touch display device as claimed in claim 1, wherein an X-axis coordinate value is obtained by measuring the first measuring electrode and the second measuring electrode.

6. The touch display device as claimed in claim 1, wherein a Y-axis coordinate value is obtained by measuring the first measuring electrode and the second measuring electrode.

7. The touch display device as claimed in claim 1, wherein the finger operation mode is activated if the difference between the first voltage value and the second voltage value is larger than the predicted error value.

8. A touch display device capable of being operated under a touch pen operation mode or a finger operation mode comprising:

a resistance touch panel comprising;

a first conductive layer; and

a second conductive layer having a uniform electric field, a first measuring electrode, and a second measuring electrode, the first conductive layer being capable of contacting the second conductive layer by pressing with an input object; and

a control module electrically connected to the first measuring electrode and the second measuring electrode, the control module comprising a measuring element for measuring the voltage of the at the first measuring electrode and the second measuring electrode;

wherein when the first conductive layer contacting the second conductive layer, the measuring element obtains a first voltage value and a second voltage value by measuring the voltage of the first measuring electrode and the second measuring electrode respectively, and the touch pen operation mode is activated if a difference between the first voltage value and the second voltage value is smaller than a predicted error value.

9. The touch display device as claimed in claim 8 further comprising a switch circuit electrically connected to the control module, the control module is used to control the switch circuit for switching the measuring element to measure the voltage of the first measuring electrode or the second measuring electrode.

10. The touch display device as claimed in claim 8, wherein the control module further comprises a switch circuit for switching the measuring element to measure the voltage of the first measuring electrode or the second measuring electrode.

11. The touch display device as claimed in claim 8, wherein the second conductive layer further comprises a first electrode and a second electrode, the first electrode electrically connected to a power source, and the second electrode electrically connected to a ground in order to have a different voltage between the first electrode and the second electrode and form the uniform electric field.

12. The touch display device as claimed in claim 8, wherein an X-axis coordinate value is obtained by measuring the first measuring electrode and the second measuring electrode.

13. The touch display device as claimed in claim 8, wherein a Y-axis coordinate value is obtained by measuring the first measuring electrode and the second measuring electrode.

14. The touch display device as claimed in claim 8, wherein a finger operation mode is activated if the difference between the first voltage value and the second voltage value is larger than the predicted error value.

15. A method of determining a touch pen operation mode or a finger operation mode for a touch display device, the touch display device comprising a first conductive layer and a second conductive layer, either the first conductive layer or the second conductive layer having a uniform electric field, the second conductive layer comprising a first measuring electrode and a second measuring electrode, the first conductive layer being capable of contacting the second conductive layer by pressing with an input object, the method comprising:

pressing the first conductive layer with the input object to contact the second conductive layer;

measuring the voltage of the first measuring electrode and the second measuring electrode to obtain a first voltage value and a second voltage value respectively;

determining whether a difference between the first voltage value and the second voltage value is smaller than a predicted error value; and

activating the touch pen operation mode if the difference between the first voltage value and the second voltage value is smaller than the predicted error value, or activating the finger operation mode if the difference between the first voltage value and the second voltage value is larger than the predicted error value.

16. The method as claimed in claim 15, wherein the first conductive layer further comprises a first electrode and a second electrode, the first electrode electrically connected to a power source, and the second electrode electrically connected to a ground, wherein the first electrode and the second electrode have a different voltage in order to form the uniform electric field.

17. The method as claimed in claim 15, wherein the second conductive layer further comprises a first electrode and a second electrode, the first electrode electrically connected to a power source, and the second electrode electrically connected to a ground, wherein the first electrode and the second electrode have a different voltage in order to form the uniform electric field.