Display device

• US 10,019,121 B2
• Filed: 11/03/2015
• Issued: 07/10/2018
• Est. Priority Date: 03/24/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Choi, Chung Sock, Cho, Sang Hwan
• Primary Examiner(s): Edouard, Patrick
• Assistant Examiner(s): Fox, Joseph
• Application Number:
  US14/931,550
• Publication Number:
  US 20160282987A1
• Time in Patent Office: 980 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

Provided is a display device including: a display unit including a pixel and a non-pixel area; an encapsulation unit configured to seal the display unit; a touch sensing electrode at the non-pixel area on the encapsulation unit and provided with a plurality of first openings; and a reflection reducing unit at the pixel and the non-pixel area on the encapsulation unit and configured as a multilayer of a metal layer and a dielectric layer. The metal layer includes a non-pixel portion overlapping the touch sensing electrode and provided with a plurality of second openings.

Claims

1. A display device comprising:

a display unit comprising a pixel and a non-pixel area disposed between the pixels adjacent to each other;

an encapsulation unit that seals the display unit;

a touch sensing electrode on the encapsulation unit at the non-pixel area and having a plurality of first openings disposed at the non-pixel area; and

a reflection reducing unit on the encapsulation unit at the pixel and at the non-pixel area, the reflection reducing unit being a multilayer of a metal layer and a dielectric layer,

wherein the metal layer comprises a non-pixel portion overlapping the touch sensing electrode and having a plurality of second openings disposed at the non-pixel portion,

wherein each of the touch sensing electrode and the non-pixel portion of the metal layer is patterned to have a plurality of lines, and

wherein the plurality of second openings is at the same positions as the plurality of first openings and has the same shape and size as those of the plurality of first openings.

2. The display device of claim 1, wherein:

the pixel comprises an organic light emitting diode, and

the encapsulation unit is a multilayer of an inorganic layer and an organic layer.

3. The display device of claim 2, further comprising:

a spacer on the encapsulation unit,

wherein the touch sensing electrode is on the spacer.

4. The display device of claim 2, further comprising:

a black layer on the encapsulation unit at the non-pixel area.

5. The display device of claim 1, wherein:

the touch sensing electrode has a mesh shape, and comprises at least one selected from a low resistance metal and a conductive nano material.

6. The display device of claim 1, wherein:

the touch sensing electrode is covered with a passivation layer, and

the reflection reducing unit comprises a first metal layer, a first dielectric layer, a second metal layer, and a second dielectric layer which are sequentially stacked on the passivation layer.

7. The display device of claim 6, wherein:

each of the first metal layer and the second metal layer comprises a pixel portion corresponding to the pixel, comprises a non-pixel portion corresponding to the non-pixel area, and has the plurality of second openings.

8. The display device of claim 1, wherein:

the reflection reducing unit comprises;

a first metal layer on the same layer as the touch sensing electrode,

a first dielectric layer that covers the first metal layer and the touch sensing electrode,

a second metal layer on the first dielectric layer, and

a second dielectric layer that covers the second metal layer.

9. The display device of claim 8, wherein:

the first metal layer comprises a pixel portion corresponding to the pixel, and

the second metal layer comprises a pixel portion corresponding to the pixel, comprises a non-pixel portion corresponding to the non-pixel area, and has the plurality of second openings.

10. The display device of claim 8, wherein:

each of the first metal layer and the second metal layer comprises a pixel portion corresponding to the pixel, comprises a non-pixel portion corresponding to the non-pixel area, and has the plurality of second openings, and

the non-pixel portion of the first metal layer is directly on the touch sensing electrode.

11. The display device of claim 1, further comprising:

a transparent adhesive layer and a cover window on the reflection reducing unit.

12. The display device of claim 1, wherein:

transmittance of light emitted vertically from the pixel and passing through the reflection reducing unit is the same as transmittance of light emitted in a diagonal direction from the pixel and passing through the touch sensing electrode and the reflection reducing unit.