Display apparatus

• US 9,965,117 B2
• Filed: 07/16/2015
• Issued: 05/08/2018
• Est. Priority Date: 03/02/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Hun, Kwon, Hyojeong, Choe, Wonkyu
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): STEPP JONES, SHAWNA T
• Application Number:
  US14/800,974
• Publication Number:
  US 20160259446A1
• Time in Patent Office: 1,027 Days
• Field of Search: None
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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 3/0445 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: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/87 Arrangements for heating or cooling
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8794 Arrangements for heating and cooling

Abstract

A display apparatus includes a first substrate on which a display area is defined; a second substrate facing the first substrate and including a touch screen layer on a surface thereof; and a sealing portion between the first substrate and the second substrate, and bonding the first substrate and the second substrate to each other. The sealing portion is formed around the display area, and the touch screen layer includes a plurality of sensing patterns and a plurality of bonding pad portions electrically connected to the plurality of sensing patterns. Each of the bonding pad portions includes a pad electrode electrically connected to the plurality of sensing patterns and a cover portion surrounding a part of the pad electrode, and the cover portion is opaque and is formed to overlap the sealing portion.

Claims

1. A display apparatus, comprising:

a first substrate on which a display area is defined;

a second substrate facing the first substrate and comprising a touch screen layer on a surface thereof; and

a sealing portion between the first substrate and the second substrate and bonding the first substrate and the second substrate to each other, the sealing portion formed around the display area,

wherein the touch screen layer comprises a plurality of sensing patterns and a plurality of bonding pad portions electrically connected to the plurality of sensing patterns,

wherein each of the bonding pad portions comprises a pad electrode electrically connected to the plurality of sensing patterns and a cover portion surrounding a part of the pad electrode,

wherein the cover portion is opaque and overlaps the sealing portion,

wherein a length of the cover portion along with a length direction of the pad electrode is about 110% to about 120% of a width of the sealing portion, and

wherein the pad electrode has a resistance that is less than a resistance of the cover portion.

2. The display apparatus of claim 1, wherein the cover portion converts absorbed light into heat.

3. The display apparatus of claim 1, wherein the cover portion performs a black-body radiation.

4. The display apparatus of claim 1, wherein the cover portion comprises at least one of manganese, chrome, nickel, or cobalt.

5. The display apparatus of claim 1, wherein the cover portion comprises a first part disposed on a lower surface of the pad electrode, a second part disposed on an upper surface of the pad electrode, and a pair of side portions that connect the first part and the second part to each other, wherein the second part has a thickness between about 500 Å

and about 1000 Å

.

6. The display apparatus of claim 5, wherein the second part has an irregular surface structure.

7. The display apparatus of claim 5, wherein the second substrate has a plurality of via holes, and a conductive member that contacts the first part and the sealing portion is filled in each of the plurality of via holes.

8. The display apparatus of claim 1, wherein a width of the cover portion in a direction perpendicular to a length direction of the pad electrode is about 110% to about 120% of a width of the pad electrode.

9. The display apparatus of claim 1, wherein the touch screen layer further comprises connectors for connecting the plurality of sensing patterns and the bonding pad portions to each other.

10. The display apparatus of claim 9, wherein the plurality of sensing patterns comprise a plurality of first sensing patterns and a plurality of second patterns that are electrically insulated from the plurality of first sensing patterns.

11. The display apparatus of claim 10, wherein the plurality of first sensing patterns are arranged in a first direction and the plurality of second sensing patterns are arranged in a second direction crossing the first direction, and the connectors comprise a first connector connecting the first sensing patterns that are adjacent to each other, and a second connector connecting the second sensing patterns that are adjacent to each other.

12. The display apparatus of claim 1, further comprising a display unit having the display area on the first substrate, wherein the display unit comprises an organic light emitting diode, and the organic light emitting diode comprises a first electrode, a second electrode, and an intermediate layer disposed between the first electrode and the second electrode and comprising an organic emission layer.

13. The display apparatus of claim 12, further comprising a thin film transistor electrically connected to the first electrode and comprising an active layer, a gate electrode, a source electrode, and a drain electrode.

14. A display apparatus, comprising:

a first substrate on which a display area is defined;

a second substrate facing the first substrate and comprising a touch screen layer on a surface thereof; and

a sealing portion between the first substrate and the second substrate and bonding the first substrate and the second substrate to each other, the sealing portion formed around the display area,

wherein the touch screen layer comprises a plurality of sensing patterns and a plurality of bonding pad portions electrically connected to the plurality of sensing patterns,

wherein each of the bonding pad portions comprises a pad electrode electrically connected to the plurality of sensing patterns and a cover portion surrounding a part of the pad electrode, wherein the pad electrode comprises at least one of Mo, Al, Cu or Ti,

wherein a length of the cover portion along with a length direction of the pad electrode is about 110% to about 120% of a width of the sealing portion, and

wherein the cover portion is opaque and overlaps the sealing portion.

15. The display apparatus of claim 14, wherein the cover portion comprises at least one of manganese, chrome, nickel, or cobalt.

16. The display apparatus of claim 14, wherein the cover portion comprises a first part disposed on a lower surface of the pad electrode, a second part disposed on an upper surface of the pad electrode, and a pair of side portions that connect the first part and the second part to each other, wherein the second part has a thickness between about 500 Å

and about 1000 Å

.

17. The display apparatus of claim 14, wherein a width of the cover portion in a direction perpendicular to a length direction of the pad electrode is about 110% to about 120% of a width of the pad electrode.

18. The display apparatus of claim 14, wherein the touch screen layer further comprises connectors for connecting the plurality of sensing patterns and the bonding pad portions to each other.