TOUCH SENSING DISPLAY DEVICE

• US 20170205924A1
• Filed: 12/13/2016
• Published: 07/20/2017
• Est. Priority Date: 01/19/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: KO, Jun-Young, KIM, Sang-Kook, JEON, Jin-Young, CHO, Hyun-Wook, KIM, Tae-Joon
• Granted Patent: US 10,572,039 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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: H10K 59/40 OLEDs integrated with touch screens

Abstract

A touch sensing display device including a first substrate with a display unit, a second substrate disposed on the first substrate, a window cover disposed on the second substrate, and a touch force sensor. The touch force sensor includes a first electrode disposed between the first substrate and the second substrate or on a bottom surface of the first substrate, and a second electrode disposed under the first substrate.

Claims

1. A touch sensing display device, comprising:

a first substrate including a display unit;

a second substrate disposed on the first substrate;

a window cover disposed on the second substrate; and

a touch force sensor including a first electrode disposed between the first substrate and the second substrate or disposed on a bottom surface of the first substrate, and a second electrode disposed under the first substrate.

2. The touch sensing display device of claim 1, wherein the first electrode is disposed on a top surface of the first substrate.

3. The touch sensing display device of claim 2, wherein the display unit comprises a pixel electrode, an organic light emitting layer and a common electrode.

4. The touch sensing display device of claim 3, wherein the first electrode is the common electrode.

5. The touch sensing display device of claim 1, wherein the touch sensing display device is driven with a time sharing method including a display mode in which the display unit displays an image and a touch sensing mode in which the touch force sensor senses a touch.

6. The touch sensing display device of claim 1, wherein the first electrode is disposed on a bottom surface of the second substrate.

7. The touch sensing display device of claim 1, further comprising a set bracket disposed under the window cover, the set bracket accommodating the first substrate, the second substrate, and the touch force sensor,

wherein the second electrode is a bottom portion of the set bracket.

8. The touch sensing display device of claim 7, further comprising a cushion member disposed between the first substrate and the set bracket.

9. The touch sensing display device of claim 1, further comprising a touch location sensor disposed between the second substrate and the window cover.

10. The touch sensing display device of claim 1, wherein the first electrode comprises a central portion and an outer portion adjacent to and surrounding the central portion, and the first electrode includes a plurality of electrode patterns.

11. The touch sensing display device of claim 10, wherein the electrode patterns disposed in the outer portion have heights greater than heights of the electrode patterns disposed in the central portion.

12. The touch sensing display device of claim 10, wherein the electrode patterns disposed in the outer portion have widths greater than widths of the electrode patterns disposed in the central portion.

13. The touch sensing display device of claim 1, wherein the first electrode and the second electrode includes at least one of silver (Ag), copper (Cu), and indium tin oxide (ITO).

14. The touch sensing display device of claim 1, wherein the first electrode is disposed on the bottom surface of the first substrate, and

wherein the second electrode is disposed under and spaced apart from the first electrode.