Organic light-emitting display device

Patent metadata

Field	Value
Publication number	US-2018123084-A1
Application number	US-201715796984-A
Country	US
Kind code	A1
Filing date	Oct 30, 2017
Priority date	Oct 31, 2016
Publication date	May 3, 2018
Grant date	—

Abstract

Disclosed is an organic light-emitting display device capable of removing a void between a pad area and a display area. The display device having a display area and a non-display area includes a thin-film transistor array, an organic light-emitting array, a touch electrode array, and an adhesive layer between the touch electrode array and the organic light-emitting array. A lower pad portion having lower electrodes is provided in the non-display area of the thin-film transistor array, an upper pad portion having upper electrodes is provided in the non-display area of the touch electrode array, and both the pad portions are bonded to each other by a seal material having one side in contact with the adhesive layer. At least one groove is provided in the non-display area of the thin-film transistor array so as to correspond to the contact area of the seal material and the adhesive layer.

First claim

What is claimed is:

1 . An organic light-emitting display device having a display area and a non-display area surrounding the display area, the organic light-emitting display device comprising:
a thin-film transistor array including a plurality of thin-film transistors and a lower pad portion located in the display area and the non-display area, respectively; an organic light-emitting array located on the thin-film transistor array; a touch electrode array including a plurality of touch electrodes and an upper pad portion located in the display area and the non-display area, respectively; an adhesive layer located between the organic light-emitting array and the touch electrode array and bonding the organic light-emitting array and the touch electrode array; and a seal material including a plurality of conductive balls and bonding the upper pad portion and the lower pad portion in the non-display area, one side of the seal material being in contact with the adhesive layer, wherein the thin-film transistor array includes at least one groove located in an area that corresponds to a boundary between the seal material and the adhesive layer.

2 . The device according to claim 1 , wherein the at least one groove has a major axis in parallel with a horizontal direction of the organic light-emitting display device.

3 . The device according to claim 2 , wherein the major axis of the at least one groove has a length equal to or greater than a length of the seal material in the horizontal direction.

4 . The device according to claim 3 , wherein at least one end of the at least one groove protrudes toward an outer periphery of the seal material and the adhesive layer.

5 . The device according to claim 3 , wherein at least one end of the at least one groove is covered with the seal material and the adhesive layer.

6 . The device according to claim 1 , wherein the lower pad portion includes a plurality of lower pad electrodes spaced apart from each other, and
wherein the at least one groove extends from the boundary between the seal material and the adhesive layer in the lower pad portion to an outer periphery of the lower pad portion through a gap between the lower pad electrodes.

7 . The device according to claim 6 , wherein one end of the at least one groove is located in the outer periphery of the lower pad portion and is covered with the seal material.

8 . The device according to claim 6 , wherein one end of the at least one groove is located in the outer periphery of the lower pad portion and protrudes to an outer periphery of an area in which the seal material is formed.

9 . The device according to claim 1 , further comprising:
a lower substrate in which the display area and the non-display area are defined; and a first buffer layer located on the lower substrate, wherein the thin-film transistor array includes a gate insulation layer disposed on the first buffer layer, at least one lower interlayer insulation layer disposed on the gate insulation layer, and a lower passivation layer disposed on the lower interlayer insulation layer, and wherein the groove is formed by removing at least one of the first buffer layer, the gate insulation layer, the at least one lower interlayer insulation layer, or the lower passivation layer.

10 . The device according to claim 1 , wherein the at least one groove penetrates the thin-film transistor array to expose the adhesive layer to an outside.

11 . An organic light-emitting display device in which a display area and a non-display area around the display area are defined, the organic light-emitting display device comprising:
a thin-film transistor array including a plurality of thin-film transistors and a lower pad portion located in the display area and the non-display area, respectively; an organic light-emitting array located on the thin-film transistor array; a touch electrode array including a plurality of touch electrodes and an upper pad portion located in the display area and the non-display area, respectively; an adhesive layer bonding the organic light-emitting array and the touch electrode array; and a seal material including a plurality of conductive balls and bonding the upper pad portion and the lower pad portion in the non-display area, wherein the touch electrode array includes at least one groove located in an area that corresponds to a boundary of the adhesive layer.

12 . The device according to claim 11 , further comprising:
a plurality of upper pad electrodes provided on the upper pad portion so as to be spaced apart from each other; and a plurality of routing lines configured to connect the upper pad electrodes and the touch electrodes to each other, wherein the groove is located between the routing lines.

13 . The device according to claim 12 , wherein the groove penetrates the touch electrode array so as to expose the adhesive layer to an outside.

14 . The device according to claim 11 , further comprising:
an upper substrate in which the display area and the non-display area are defined; and a second buffer layer located on an entire surface of the upper substrate, wherein the touch electrode array includes at least one upper interlayer insulation layer disposed under the second buffer layer and an upper passivation layer disposed under the upper interlayer insulation layer, and wherein the groove is formed by removing at least one of the second buffer layer, the upper interlayer insulation layer, or the upper passivation layer.

15 . An organic light-emitting display device where a display area and a non-display area surrounding the display area are defined thereon, comprising:
a thin-film transistor array including a plurality of thin-film transistors and a lower pad portion, respectively located in the display area and the non-display area; an organic light-emitting array located on the thin-film transistor array; a touch electrode array including a plurality of touch electrodes and an upper pad portion, respectively located in the display area and the non-display area; an adhesive layer bonding the organic light-emitting array and the touch electrode array; and a seal material attaching the upper pad portion with the lower pad portion in the non-display area, wherein the thin-film transistor array or the touch electrode array includes at least one groove in close proximity to the adhesive layer to act as a path for outgassing from the adhesive layer to outside the organic light-emitting display device.

16 . The device according to claim 15 , wherein the at least one groove has a major axis in parallel with a horizontal direction of the organic light-emitting display device.

17 . The device according to claim 16 , wherein the major axis of the at least one groove has a length equal to or greater than a length of the seal material in the horizontal direction.

18 . The device according to claim 17 , wherein at least one end of the at least one groove protrudes toward an outer periphery of the seal material and the adhesive layer.

19 . The device according to claim 15 , wherein the lower pad portion includes a plurality of lower pad electrodes spaced apart from each other.

20 . The device according to claim 15 , wherein the at least one groove extends from the in close proximity to the adhesive layer in the lower pad portion to an outer periphery of the lower pad portion through a gap between the lower pad electrodes.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Do-Man

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H10K59/127

  comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates · CPC title

• H01L27/323

  Electricity · mapped topic