Touch-control display device with integration of capacitive and electromagnetic touch units

• US 9,639,216 B2
• Filed: 11/07/2013
• Issued: 05/02/2017
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Lu, Feng, Ma, Jun
• Primary Examiner(s): Pham, Long D
• Application Number:
  US14/074,597
• Publication Number:
  US 20150002453A1
• Time in Patent Office: 1,272 Days
• Field of Search: 345173
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/04166 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 3/046 by electromagnetic means

Abstract

A touch-control display device is disclosed. The display device includes first, second, and third touch-control structures, a first plate, and a second plate opposing the first plate. The first and second touch-control structures form a capacitive touch-control structure, the third touch-control structure is an electromagnetic touch-control structure, and the first, second and third touch-control structures are respectively disposed on an inner side of the first plate, on an external side of the first plate, and on an inner or external side of the second plate. In addition, the first, second, and third touch-control structures are separated by one or more insulating layers.

Claims

1. A touch-control display device, comprising:

a display device, comprising;

a first plate;

a liquid crystal display layer below the first plate;

a second plate disposed at the lower side of liquid crystal display layer;

an upper polarizer disposed on the top side of the first plate;

a lower polarizer disposed on the bottom side of the second plate;

a first touch-control structure sandwiched between the upper polarizer and the first plate;

a second touch-control structure forming a capacitive touch-control with the first touch-control structure; and

a third touch-control structure forming an electromagnetic touch-control;

wherein at least one of the upper polarizer and the lower polarizer comprises a projection, wherein a pin is disposed on one side of the projection which faces the liquid crystal display device, and is configured to transmit a drive signal to the touch-control structures, and

wherein the second touch-control structure is disposed between the first plate and the liquid crystal layer, and the third touch-control structures is sandwiched between the second plate and the lower polarizer, or

the third touch-control structure is sandwiched between the first plate and the liquid crystal display layer, and the second touch-control structure is sandwiched between the second plate and the lower polarizer.

2. The touch-control display device according to claim 1, wherein the display device is a liquid crystal display device.

3. The touch-control display device according to claim 1, wherein the first touch-control structure comprises a plurality of first touch-control electrodes and a plurality of first connecting lines,

wherein the plurality of first touch-control electrodes are connected together by the plurality of first connecting lines to form a first touch-control line which extends in a first direction.

4. The touch-control display device according to claim 3, wherein the second touch-control structure comprises a plurality of second touch-control electrodes and a plurality of second connecting lines,

wherein the plurality of second touch-control electrodes are connected together by the plurality of second connecting lines to form a second touch-control line which extends in a second direction perpendicular to the first direction.

5. The touch-control display device according to claim 1, wherein the first, second and third touch-control structures comprise a transparent conductive material.

6. The touch-control display device according to claim 1, further comprises a common electrode layer below the first plate, wherein the second touch-control structure and the common electrode layer of the liquid crystal display device are on a same layer.

7. The touch-control display device according to claim 1, wherein during a scan cycle, a scan time period of the electromagnetic touch-control structure substantially does not overlap a scan time period of the capacitive touch-control structure.

8. The touch-control display device according to claim 1, wherein during a scan cycle, a scan time period of the touch-control structure formed inside the display device substantially does not overlap or just partially overlaps a scan time period of the display device.

9. The touch-control display device according to claim 1, wherein during a scan cycle, a scan time period of the touch-control structure formed outside the display device at least partly overlaps a scan time period of the display device.

10. The touch-control display device according to claim 9, wherein the third touch-control structure is disposed on an internal side of the display device, and during the scan time period of the display device, the electromagnetic touch-control structure scans a plurality of times.

11. The touch-control display device according to claim 10, wherein, in response to not receiving a signal fed back by an external electromagnetic pen during a first scan time period, the electromagnetic touch-control structure stops scanning during the first scan time.

12. A touch-control display device, comprising:

a display device, comprising;

a first plate, and

a second plate opposing the first plate;

a first touch-control structure;

a second touch-control structure; and

a third touch-control structure,

wherein the first and second touch-control structures form a capacitive touch-control structure, and the third touch-control structure is an electromagnetic touch-control structure,

wherein one or two of the first, second and third touch-control structures are disposed on an inner side of the first plate or on an inner side of the second plate and the rest of the first, second and third touch-control structures is disposed on an external side of the first plate or an external side of the second plate,

wherein the first, second and third touch-control structures are separated by one or more insulating layers, the inner side of the first plate and the inner side of the second plate face each other, and the external side of the first plate and the external side of the second plate face away from each other,

wherein the display device is a liquid crystal display device and the display device further comprises an upper polarizer disposed on an external side of the first plate and a lower polarizer disposed on an external side of the second plate, and

wherein at least one of the upper polarizer and the lower polarizer comprise a projection, where a pin is disposed on one side of the projection which faces the liquid crystal display device, and is configured to transmit a drive signal to the touch-control structures.

13. The touch-control display device according to claim 12, wherein the first, second or third touch-control structure is disposed on an external side of the upper polarizer or on an external side of the lower polarizer, and the first, second and third touch-control structures are not disposed on a same layer.

14. The touch-control display device according to claim 13, wherein the touch-control structure formed on the inner side of the first plate and a common electrode layer of the liquid crystal display device are on a same layer.

15. The touch-control display device according to claim 12, wherein during a scan cycle, a scan time period of the electromagnetic touch-control structure substantially does not overlap a scan time period of the capacitive touch-control structure.

16. The touch-control display device according to claim 12, wherein during a scan cycle, a scan time period of the touch-control structure formed inside the display device substantially does not overlap or just partially overlaps a scan time period of the display device.

17. The touch-control display device according to claim 16, wherein the third touch-control structure is disposed on an external side of the display device.

18. The touch-control display device according to claim 12, wherein during a scan cycle, a scan time period of the touch-control structure formed outside the display device at least partly overlaps a scan time period of the display device.

19. The touch-control display device according to claim 18, wherein the third touch-control structure is disposed on an internal side of the display device, and during the scan time period of the display device, the electromagnetic touch-control structure scans a plurality of times.