Touch display device having auxiliary capacitor

• US 9,477,365 B2
• Filed: 04/16/2015
• Issued: 10/25/2016
• Est. Priority Date: 04/22/2014
• Status: Expired due to Fees

• Current Assignee: Rich IP Technology, Inc.
• Original Assignee: Rich IP Technology, Inc.
• Inventors: Chen, Han-Chang, Tu, Yen-Hung, Chia, Chung-Lin, Wu, Chih-Wen, Chang, Jen-Chieh
• Primary Examiner(s): DINH, DUC Q
• Application Number:
  US14/688,225
• Publication Number:
  US 20150301654A1
• Time in Patent Office: 558 Days
• Field of Search: 345173-181
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
• CPC Class Codes: G09G 2300/04 Structural and physical details of display devices
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

A touch display device having auxiliary capacitor, including: at least one touch operation area, each having two opposing substrates, between which are a first electrode, a first conductive line coupled with the first electrode, a second electrode, a second conductive line coupled with the second electrode, and a display layer neighboring both the first electrode and the second electrode; a display driver unit for outputting at least one display driving voltage; a touch detection unit having at least one touch signal sensing port; at least one auxiliary capacitor, each coupled with one of the at least one touch operation area; and at least one switch element; wherein, each of the at least one display driving voltage is coupled to one of the at least one touch operation area via one of the at least one switch element.

Claims

1. A touch display device having auxiliary capacitor, comprising:

at least one touch operation area, each having two opposing substrates for providing at least one touch surface, wherein, a first electrode, a first conductive line coupled with said first electrode, a second electrode, a second conductive line coupled with said second electrode, and a display layer neighboring both said first electrode and said second electrode are located between said two opposing substrates; and

said at least one touch surface covers at least one touch sensing element, said touch sensing element being selected from a group consisting of said first electrode, said second electrode, said first conductive line, and said second conductive line;

a display driver unit for outputting at least one display driving voltage to said at least one touch operation area;

a touch detection unit having at least one touch signal sensing port, wherein each of said at least one touch signal sensing port is coupled with one surface of said at least one touch surface or with two surfaces of said at least one touch surface;

at least one auxiliary capacitor, each having two connection ends coupled respectively with said first conductive line and said second conductive line of one of said at least one touch operation area; and

at least one switch element;

wherein, each of said at least one display driving voltage is coupled to one of said at least one touch operation area via one of said at least one switch element, and when said touch detection unit performs a touch detection procedure, at least one of said at least one switch element will be switched off.

2. The touch display device having auxiliary capacitor as disclosed in claim 1, wherein said display layer is selected from a group consisting of OLED display layer, PLED display layer, liquid crystal display layer, and electronic paper display layer, and said display layer is located below said first electrode and above said second electrode, or above both said first electrode and said second electrode.

3. The touch display device having auxiliary capacitor as disclosed in claim 1, wherein said touch detection procedure is selected from a group consisting of self-capacitor touch detection procedure and mutual-capacitor touch detection procedure.

4. The touch display device having auxiliary capacitor as disclosed in claim 1, wherein when said touch detection unit performs said touch detection procedure, at least one of said at least one switch element will be switched on to disable at least one of said at least one touch operation area.

5. A touch display device having auxiliary capacitor, comprising:

at least one touch operation area, each having two opposing substrates for providing at least one touch surface, wherein, a first electrode, a first conductive line coupled with said first electrode, a second electrode, a second conductive line coupled with said second electrode, and a display layer neighboring both said first electrode and said second electrode are located between said two opposing substrates; and

said at least one touch surface covers at least one touch sensing element, said touch sensing element being selected from a group consisting of said first electrode, said second electrode, said first conductive line, and said second conductive line;

a display driver unit for outputting at least one display driving voltage to said at least one touch operation area;

a touch detection unit having at least one touch signal sensing port, wherein each of said at least one touch signal sensing port is coupled with one surface of said at least one touch surface or with two surfaces of said at least one touch surface;

at least one auxiliary capacitor, each having two connection ends coupled respectively with said first conductive line and said second conductive line of one of said at least one touch operation area; and

at least one pair of switch elements;

wherein, each of said at least one display driving voltage is coupled to one of said at least one touch operation area via one pair of said switch elements, and when said touch detection unit performs a touch detection procedure, at least one pair of said switch elements will be switched off.

6. The touch display device having auxiliary capacitor as disclosed in claim 5, wherein said display layer is selected from a group consisting of OLED display layer, PLED display layer, liquid crystal display layer, and electronic paper display layer, and said display layer is located below said first electrode and above said second electrode, or above both said first electrode and said second electrode.

7. The touch display device having auxiliary capacitor as disclosed in claim 5, wherein said touch detection procedure is selected from a group consisting of self-capacitor touch detection procedure and mutual-capacitor touch detection procedure.

8. The touch display device having auxiliary capacitor as disclosed in claim 5, wherein when said touch detection unit performs said touch detection procedure, at least one pair of said switch elements will be switched on to disable at least one of said at least one touch operation area.

9. A touch display device having auxiliary capacitor, comprising:

at least one touch operation area, each having two opposing substrates for providing at least one touch surface, wherein, a first transistor, a first electrode, a first conductive line coupled with said first electrode, a second electrode, a second conductive line coupled with said second electrode, an auxiliary capacitor, a display layer neighboring both said first electrode and said second electrode, and a second transistor are located between said two opposing substrates, wherein said first transistor has a gate for coupling with a gate driving signal, a drain for coupling with a display driving signal and a touch signal, and a source for coupling with said first electrode;

said second transistor has a gate for coupling with a switch signal, a drain for coupling with said second electrode, and a source for coupling with a ground; and

said auxiliary capacitor is coupled between said first electrode and said second electrode;

a display driver unit for generating said gate driving signal and said display driving signal; and

a touch detection unit for generating said switch signal and said touch signal, wherein, when said touch detection unit performs a touch detection procedure, said switch signal for at least one of said at least one touch operation area will exhibit a switch-off voltage to switch off said second transistor thereof.

10. The touch display device having auxiliary capacitor as disclosed in claim 9, wherein said drain of said first transistor is coupled with said display driving signal and said touch signal via a switch element.

11. The touch display device having auxiliary capacitor as disclosed in claim 9, wherein said drain of said first transistor is coupled with a data line auxiliary capacitor.

12. The touch display device having auxiliary capacitor as disclosed in claim 9, wherein said display layer is selected from a group consisting of OLED display layer, PLED display layer, liquid crystal display layer, and electronic paper display layer, and said display layer is located below said first electrode and above said second electrode, or above both said first electrode and said second electrode.

13. The touch display device having auxiliary capacitor as disclosed in claim 9, wherein said touch detection procedure is selected from a group consisting of self-capacitor touch detection procedure and mutual-capacitor touch detection procedure.

14. The touch display device having auxiliary capacitor as disclosed in claim 9, wherein when said touch detection unit performs said touch detection procedure, said second transistor of at least one of said at least one touch operation area will be switched on to disable a touch operation area thereof.