TOUCH SENSING STRUCTURE

• US 20140009400A1
• Filed: 07/03/2012
• Published: 01/09/2014
• Est. Priority Date: 07/03/2012
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: Innocom Technology Limited, InnoLux Corporation
• Inventors: POORTER, Adjo, MEIJERS, Jan Mathijs
• Granted Patent: US 8,994,677 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Abstract

A touch sensing structure including a central area and a border area, including: a display panel, including: first substrate; and a second substrate opposite to the first substrate, wherein the second substrate comprises in the border area a recess that partially exposes the first substrate; a main flexible printed circuit (FPC) and a touch flexible printed circuit (FPC) laterally juxtaposed in the border area, wherein the main FPC is bonded to an exposed portion of the first substrate and electrically connected to a first driving element, wherein the touch FPC is bonded to the second substrate and electrically connected to a second driving element; and a touch sensing unit disposed on the second substrate and electrically connected to the touch FPC.

Claims

1. A touch sensing structure comprising a central area and a border area, comprising:

a display panel, including;

a first substrate; and

a second substrate opposite to the first substrate, wherein the second substrate comprises in the border area a recess that partially exposes the first substrate;

a main flexible printed circuit (FPC) and a touch flexible printed circuit (FPC) laterally juxtaposed in the border area, wherein the main FPC is bonded to an exposed portion of the first substrate and electrically connected to a first driving element, wherein the touch FPC is bonded to the second substrate and electrically connected to a second driving element; and

a touch sensing unit disposed on the second substrate and electrically connected to the touch FPC.

2. The touch sensing structure as claimed in claim 1, wherein the recess has a triangular, rectangular, trapezoidal, hexagonal, or octangonal shape.

3. The touch sensing structure as claimed in claim 1, wherein the exposed portion of the first substrate is at a corner of the first substrate.

4. The touch sensing structure as claimed in claim 1, wherein the exposed portion of the first substrate is substantially in a middle region of the border area.

5. The touch sensing structure as claimed in claim 1, wherein each of the first substrate and the second substrate comprises glass or plastic.

6. The touch sensing structure as claimed in claim 1, wherein the display panel further comprises a display medium between the first substrate and second substrate.

7. The touch sensing structure as claimed in claim 6, wherein the display medium is liquid crystal.

8. The touch sensing structure as claimed in claim 6, wherein the display medium is an organic light-emitting material.

9. The touch sensing structure as claimed in claim 1, wherein the first substrate is a thin film transistor array substrate.

10. The touch sensing structure as claimed in claim 9, wherein the second substrate is a color filter substrate.

11. The touch sensing structure as claimed in claim 1, wherein the touch sensing unit is a touch panel.

12. The touch sensing structure as claimed in claim 1, wherein the touch sensing unit comprises a plurality of touch sensing electrodes.

13. The touch sensing structure as claimed in claim 1, wherein the first driving element is disposed on the first substrate in the border area.

14. The touch sensing structure as claimed in claim 1, wherein the second driving element is disposed on the second substrate in the border area.

15. The touch sensing structure as claimed claim 1, wherein the first driving element is integrated onto the main FPC.

16. The touch sensing structure as claimed claim 1, wherein the second driving element is integrated onto the touch FPC.

17. The touch sensing structure as claimed in claim 1, wherein the touch sensing structure further comprises a cover substrate over the touch sensing unit.

18. The touch sensing structure as claimed in claim 1, further comprising a sealant between the first substrate and the second substrate for sealing the display medium therein.

19. The touch sensing structure as claimed in claim 18, wherein the sealant is formed following a contour of the second substrate.

20. The touch sensing structure as claimed in claim 18, wherein an additional sealant is used in an area next to the recess.