Organic light emitting display device

• US 9,342,176 B2
• Filed: 03/23/2009
• Issued: 05/17/2016
• Est. Priority Date: 07/21/2008
• 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, Young-Dae, Choi, Jong-Hyun, Im, Choong-Youl, Lee, Il-Jeong
• Primary Examiner(s): Patel, Kumar
• Assistant Examiner(s): CHOWDHURY, AFROZA Y
• Application Number:
  US12/409,375
• Publication Number:
  US 20100013745A1
• Time in Patent Office: 2,612 Days
• Field of Search: 345/173, 345/76
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 2102/341 Short-circuit prevention
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

An organic light emitting display device having an electrostatic capacitive type touch panel function with reduced thickness and improved luminance. A display panel of the organic light emitting display device includes a substrate, a display unit having a plurality of pixels on the substrate, and a touch sensing unit on the display unit. The touch sensing unit includes an encapsulation substrate and a capacitive pattern layer on a side of the encapsulation substrate facing the display unit. The capacitive pattern layer has a plurality of openings corresponding in position to the plurality of pixels.

Claims

1. A display panel comprising:

a substrate;

a display unit on the substrate, the display unit comprising a plurality of pixels; and

a touch sensing unit on the display unit, the touch sensing unit comprising;

an encapsulation substrate; and

a capacitive pattern layer on a side of the encapsulation substrate facing the display unit, the capacitive pattern layer having a plurality of openings corresponding in position to the plurality of pixels, at least one of the pixels being aligned with a corresponding one of the openings along a direction perpendicular to the substrate,

wherein the capacitive pattern layer comprises a plurality of first pattern units extending in a first direction and a plurality of second pattern units arranged in a second direction crossing the first direction, at least one of the first pattern units having at least one of the plurality of openings and at least one of the second pattern units having at least one of the plurality of openings, and

wherein the plurality of first pattern units and the plurality of second pattern units are on the side of the encapsulation substrate facing the display unit.

2. The display panel of claim 1, wherein the first and second pattern units are arranged in a matrix pattern.

3. The display panel of claim 2, wherein the plurality of first pattern units is arranged in columns extending in the first direction and the plurality of second pattern units is arranged in rows extending in the second direction crossing the first direction.

4. The display panel of claim 3, wherein the plurality of first pattern units are electrically coupled to each other.

5. The display panel of claim 3, further comprising a first insulation layer on the plurality of first pattern units and the plurality of second pattern units.

6. The display panel of claim 5, further comprising a plurality of connectors on the first insulation layer for electrically coupling adjacent units of the plurality of second pattern units.

7. The display panel of claim 6, further comprising a second insulation layer on the plurality of connectors.

10. The display panel of claim 2, wherein each of the first and second pattern units has a substantially quadrilateral shape.

11. The display panel of claim 2, wherein each of the first and second pattern units has a substantially diamond or rectangular shape.

12. The display panel of claim 1, wherein an opening of the plurality of openings corresponds in position to at least one pixel of the plurality of pixels.

13. The display panel of claim 12, wherein the opening of the plurality of openings corresponds in position to only one pixel of the plurality of pixels.

14. The display panel of claim 13, wherein the pixel is a subpixel.

15. The display panel of claim 13, wherein a center of the opening is substantially aligned with a center of the pixel in a direction substantially normal to the side of the encapsulation substrate.

16. The display panel of claim 1, wherein each of the plurality of openings has substantially the same shape as that of a corresponding pixel of the plurality of pixels.

17. The display panel of claim 1, wherein an opening of the plurality of openings has an area substantially identical to or larger than an area of a pixel of the plurality of pixels in size.

18. The display panel of claim 1, wherein the plurality of openings are arranged in a pattern corresponding to an arrangement pattern of the plurality of pixels.

19. The display panel of claim 1, wherein the plurality of openings are identical to or less than the plurality of pixels in number.

20. The display panel of claim 1, wherein the touch sensing unit further comprises a plurality of extending units on the side of the encapsulation substrate for electrically coupling the capacitive pattern layer to the substrate.

21. The display panel of claim 20, further comprising a conductive member between the substrate and the touch sensing unit for coupling the plurality of extending units to the substrate.

22. The display panel of claim 1, wherein the capacitive pattern layer comprises a material selected from the group consisting of ITO, IZO, ZnO, In2O3, and combinations thereof.

23. The display panel of claim 1, wherein the display unit is an organic light emitting display.

8. A display panel comprising:

a substrate;

a display unit on the substrate, the display unit comprising a plurality of pixels;

a touch sensing unit on the display unit, the touch sensing unit comprising;

an encapsulation substrate; and

a capacitive pattern layer on a side of the encapsulation substrate facing the display unit, the capacitive pattern layer having a plurality of openings corresponding in position to the plurality of pixels, at least one of the pixels being aligned with a corresponding one of the openings along a direction perpendicular to the substrate,

wherein the capacitive pattern layer comprises a plurality of pattern units arranged in a matrix pattern, the plurality of pattern units comprising a plurality of first pattern units arranged in columns extending in a first direction and a plurality of second pattern units arranged in rows extending in a second direction crossing the first direction; and

a first insulation layer between the plurality of first pattern units and the plurality of second pattern units,

wherein the plurality of first pattern units are between the encapsulation substrate and the first insulation layer, and the plurality of second pattern units are on the first insulation layer.

9. The display panel of claim 8, further comprising a second insulation layer on the plurality of second pattern units.

24. A method of fabricating a display panel having a touch sensing interface, the method comprising:

providing a display unit on a substrate, the display unit comprising a plurality of pixels;

forming a capacitive pattern layer on a side of an encapsulation substrate;

forming a plurality of openings in the capacitive pattern layer corresponding in position to the plurality of pixels, at least one of the pixels being aligned with a corresponding one of the openings along a direction perpendicular to the substrate; and

attaching the encapsulation substrate to the substrate with the display unit facing the capacitive pattern layer,

wherein the forming of the capacitive pattern layer comprises;

forming a plurality of first pattern units extending in a first direction; and

forming a plurality of second pattern units extending in a second direction crossing the first direction,

wherein the forming of the plurality of openings comprises forming at least one of the plurality of openings in at least one of the first pattern units and forming at least one of the plurality of openings in at least one of the second pattern units, and

wherein the plurality of first pattern units and the plurality of second pattern units are formed on the side of the encapsulation substrate facing the display unit.