Display device including touch sensor and driving method thereof

• US 10,394,387 B2
• Filed: 06/16/2015
• Issued: 08/27/2019
• Est. Priority Date: 11/26/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Bok, Seung Lyong, Hong, Won Ki
• Primary Examiner(s): Lee, Nicholas J
• Assistant Examiner(s): Oliver, Gerald L
• Application Number:
  US14/741,236
• Publication Number:
  US 20160147375A1
• Time in Patent Office: 1,533 Days
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• 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 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A display device including a touch sensor and a driving method thereof, and more particularly, a curved display device including a touch sensor and a driving method thereof, are presented. The display device includes: a touch sensor unit including a plurality of touch sensors; and at least one touch surface curved to along a first direction, wherein the touch surface includes a center region and edge regions positioned at both sides of the center region along the first direction, and wherein a sensitivity of the touch sensor in the center region is higher than a sensitivity of the touch sensors in the edge regions.

Claims

1. An organic light emitting display device comprising:

a display panel;

an encapsulation layer on the display panel;

a substrate on the encapsulation layer;

a touch sensor unit including a plurality of touch sensors and a plurality of touch wires on the substrate;

a plurality of pixels including a plurality of light emitting layers between pixel electrodes and an opposed electrode arranged in the display panel; and

a plurality of signal lines and a plurality of thin film transistors in the display panel,

wherein the plurality of touch sensors comprises a plurality of first sense cells arranged in a first direction on the substrate, and a plurality of second sense cells arranged in a second direction on the substrate,

wherein the display panel has a first portion, a second portion and a third portion, the first portion and the second portion are curved, and the third portion between first portion and second portion is substantially flat,

wherein the substrate including the touch sensor unit has a fourth portion, a fifth portion and a sixth portion, the fourth portion and the fifth portion are curved, and the sixth portion between the fourth portion and the fifth portion is substantially flat,

wherein the first portion is substantially entirely overlapped with the fourth portion in a plan view,

wherein the second portion is substantially entirely overlapped with the fifth portion in the plan view,

wherein the third portion is substantially entirely overlapped with the sixth portion in the plan view,

wherein the encapsulation layer includes at least one inorganic insulating layer and an organic insulating layer,

wherein the first sense cells and the second sense cells are on a same layer,

wherein the second sense cells are alternately arranged with the first sense cells so that the second sense cells do not overlap the first sense cells in the plan view, and

wherein the first sense cells and the second sense cells have a substantially quadrangular shape, respectively.

2. The organic light emitting display device of claim 1, wherein an area of the first sense cell in the fourth portion or in the fifth portion is different from an area of the second sense cell in the sixth portion.

3. The organic light emitting display device of claim 1, wherein the first or second sense cells in the fourth portion or in the fifth portion are not connected from the first or second sense cells in the sixth portion.

4. The organic light emitting display device of claim 1, wherein the first portion and the second portion are symmetric in a side view with respect to a center of the third portion.

5. An organic light emitting display device comprising:

a display panel;

an encapsulation layer on the display panel;

an insulating layer on the encapsulation layer;

a touch sensor unit including a plurality of touch sensors and a plurality of touch wires on the insulating layer;

a plurality of pixels including a plurality of light emitting layer between pixel electrodes and an opposed electrode arranged in the display panel; and

a plurality of signal lines and a plurality of thin film transistors in the display panel,

wherein the plurality of touch sensors comprises a plurality of first sense cells arranged in a first direction on the insulating layer, and a plurality of second sense cells arranged in a second direction on the insulating layer,

wherein the display panel has a first portion, a second portion and a third portion, the first portion and the second portion are curved, and the third portion between first portion and second portion is substantially flat,

wherein the insulating layer has a fourth portion, a fifth portion and a sixth portion, the fourth portion and the fifth portion are curved, and the sixth portion between the fourth portion and the fifth portion is substantially flat,

wherein the first portion is substantially entirely overlapped with the fourth portion in a plan view,

wherein the second portion is substantially entirely overlapped with the fifth portion in the view,

wherein the third portion is substantially entirely overlapped with the sixth portion in the plan view,

wherein the encapsulation layer includes at least one inorganic insulating layer and an organic insulating layer,

wherein the first sense cells and the second sense cells are on a same layer,

wherein the second sense cells are alternately arranged with the first sense cells so that the second sense cells do not overlap the first sense cells in the plan view, and

wherein the first sense cells and the second sense cells have a substantially quadrangular shape, respectively.

6. The organic light emitting display device of claim 5, wherein an area of the first sense cell in the fourth portion or in the fifth portion is different from an area of the second sense cell in the sixth portion.

7. The organic light emitting display device of claim 5, wherein the first or second sense cells in the fourth portion or in the fifth portion are not connected from the first or second sense cells in the sixth portion.

8. The organic light emitting display device of claim 5, wherein the first portion and the second portion are symmetric in a side view with respect to a center of the third portion.