TOUCH DISPLAY PANEL AND TOUCH DISPLAY APPARATUS USING SAME

• US 20150177881A1
• Filed: 10/27/2014
• Published: 06/25/2015
• Est. Priority Date: 12/24/2013
• Status: Active Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Ye Xin Technology Consulting Co Ltd
• Inventors: CHEN, Chung-Chun
• Application Number:
  US14/524,577
• Publication Number:
  US 20150177881A1
• Time in Patent Office: Days
• 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• 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: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A touch display panel is capable of operating under a display period or a touch sensitive period. The touch display panel includes a touch sensitive electrode layer, a common electrode layer, and a display driving structure sandwiched between the touch sensitive electrode layer and the common electrode layer. The display driving structure includes a plurality of first driving lines, a plurality of pixel electrodes, and a plurality of switch units respectively connected to a specified first driving line and a specified pixel electrode. A touch scan controlling signal is applied to the common electrode layer during the touch sensitive period, and a first compensated signal is applied to each of the first driving lines orderly in a first predetermined time interval, the common electrode layer cooperates with the touch sensitive electrode layer to detect touch operations on the touch display apparatus.

Claims

1. A touch display panel capable of operating under a display period or a touch sensitive period, the touch display panel comprising:

a touch sensitive electrode layer;

a common electrode layer; and

a display driving structure connected between the touch sensitive electrode layer and the common electrode layer, the display driving structure comprising;

a plurality of first driving lines;

a plurality of pixel electrodes; and

a plurality of switch units respectively connected to a specified first driving line from among the plurality of first driving lines and a specified pixel electrode from among the plurality of pixel electrodes;

wherein a direct specified voltage is applied to the common electrode layer in cooperation with the corresponding pixel electrode during the display period;

a touch scan controlling signal is applied to the common electrode layer during the touch sensitive period, and a first compensated signal is applied to each of the first driving lines orderly in a first predetermined time interval; and

the common electrode layer cooperates with the touch sensitive electrode layer to detect touch operations on the touch display apparatus.

2. The touch display panel of claim 1, wherein phases and amplitudes of the first compensated signal and the touch scan controlling signal are the same.

3. The touch display panel of claim 1, wherein the display driving structure further comprising a plurality of second driving lines;

the second driving lines are intersected and insulated with the first driving lines;

the switch unit is further connected to the second driving lines;

the switching unit comprises a controlling terminal, a first conducting terminal, and a second conducting terminal;

the controlling terminal is connected to a specified first driving line, the first conducting terminal is connected to a specified second driving line, and the second conducting terminal is connected to a specified pixel electrode.

4. The touch display panel of claim 1, further comprising an acquiring unit;

wherein the touch sensitive electrode layer comprises a plurality of touch sensitive electrodes arranged in a matrix;

the touch sensitive electrode is connected to a specified acquiring unit;

the common electrode layer detects voltage change on the touch sensitive electrodes for indentifying touch operations on the touch display panel via the acquiring unit.

5. The touch display panel of claim 4, wherein the acquiring unit comprises an amplifier, a capacitor, and a switch;

the amplifier comprises a first inputting terminal, a second inputting terminal, and an outputting terminal;

the first inputting terminal is connected to the common electrode layer for receiving touch controlling signal;

the second inputting terminal is connected to the touch sensitive electrode layer for detecting voltage on the touch sensitive electrode;

the capacitor and the switch are connected between the second inputting terminal and the outputting terminal in parallel.

6. The touch display panel of claim 3, wherein the common electrode layer comprises a plurality of common electrodes corresponding to the first driving lines in an one-to-one relationship;

the common electrodes are divided into a plurality of teams;

the teams are orderly being applied by a touch controlling signal;

in anytime, a specified team is being applied by the touch controlling signal, and the first driving lines corresponding to the specified team are being applied by the first compensated signal simultaneously.

7. The touch display panel of claim 3, wherein under the touch sensitive period, a second compensated signal is applied to each of the second driving lines orderly in a second predetermined time interval;

the second compensated signal is equal to a superposition of the touch scan signals applied on different teams of second electrodes of the common electrode layer.

8. The touch display panel of claim 7, wherein phases and amplitudes of the second compensated signal and the touch scan controlling signal are the same.

9. The touch display panel of claim 3, wherein under the touch sensitive period, the second driving lines are being applied by a direct specified voltage or floated.

10. A touch display apparatus capable of operating under a display period or a touch sensitive period;

the touch display apparatus comprising;

a first substrate with a touch sensitive layer;

a second substrate with a common electrode layer;

a liquid crystal layer with a plurality of liquid crystals sandwiched between the first substrate and the second substrate; and

a display driving structure connected between the touch sensitive electrode layer and the common electrode layer, the display driving structure comprising;

a plurality of first driving lines;

a plurality of pixel electrodes; and

a plurality of switch units connected to a specified first driving line from among the plurality of first driving lines and a specified pixel electrode from among the plurality of pixel electrodes;

wherein the touch sensitive layer cooperates with the common electrode layer to form a plane field for driving liquid crystals rotating in a specified plane;

under the touch sensitive period, a touch scan controlling signal is applied to the common during the touch sensitive period, and a first compensated signal is applied to each of the first driving lines orderly in a first predetermined time interval, the common electrode layer cooperates with the touch sensitive electrode layer to detect touch operations on the touch display apparatus.

11. The touch display apparatus of claim 10, wherein the touch sensitive electrode layer comprises a plurality of first electrodes parallel with each other along a first direction;

the common electrode layer comprises a plurality of second electrodes parallel with each other along a second direction;

the first direction is angled with the second direction.

12. The touch display apparatus of claim 10, wherein the common electrode layer comprises a plurality of common electrodes corresponding to the first driving lines in an one-to-one relationship;

the common electrodes are divided into a plurality of teams;

the teams are orderly being applied by a touch controlling signal;

in anytime, a specified team is being applied by the touch controlling signal, and the first driving lines corresponding to the specified team are being applied by the first compensated signal simultaneously.

13. The touch display apparatus of claim 12, wherein the display driving structure further comprising a plurality of second driving lines;

the second driving lines are intersected and insulated with the first driving lines.

14. The touch display apparatus of claim 13, wherein under the touch sensitive period, a second compensated signal is applied to each of the second driving lines orderly in a second predetermined time interval.

15. The touch display apparatus of claim 14, wherein the second compensated signal is equal to the superposition of the touch scan signals applied to different teams of second electrodes of the common electrode layer.

16. The touch display apparatus of claim 13, wherein under the touch sensitive period, the second driving lines are being applied by a direct specified voltage or floated.

17. The touch display apparatus of claim 13, wherein phases and amplitudes of the first compensated signal, the second compensated signal, and the touch scan controlling signal are the same.

18. The touch display apparatus of claim 13, wherein the switch unit is further connected to the second driving lines;

the switching unit comprises a controlling terminal, a first conducting terminal, and a second conducting terminal;

the controlling terminal is connected to a specified first driving line, the first conducting terminal is connected to a specified second driving line, and the second conducting terminal is connected to a specified pixel electrode.

19. The touch display apparatus of claim 10, further comprising an acquiring unit;

wherein the touch sensitive electrode layer comprises a plurality of touch sensitive electrodes arranged in a matrix;

the touch sensitive electrode is connected to a specified acquiring unit;

the common electrode layer detects voltage change on the touch sensitive electrodes for indentifying touch operations on the touch display panel via the acquiring unit.

20. The touch display apparatus of claim 19, wherein the acquiring unit comprises an amplifier, a capacitor, and a switch;

the amplifier comprises a first inputting terminal, a second inputting terminal, and an outputting terminal;

the first inputting terminal is connected to the common electrode layer for receiving touch controlling signal;

the second inputting terminal is connected to the touch sensitive electrode layer for detecting voltage on the touch sensitive electrode;

the capacitor and the switch are connected between the second inputting terminal and the outputting terminal in parallel.