Flat panel display and method of manufacturing the same

• US 9,391,126 B2
• Filed: 02/22/2011
• Issued: 07/12/2016
• Est. Priority Date: 02/23/2010
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: Kim, Sun-Hwa
• Primary Examiner(s): WONG, ERIC K
• Application Number:
  US13/032,567
• Publication Number:
  US 20110205470A1
• Time in Patent Office: 1,967 Days
• Field of Search: 349/41, 349/147
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133565 inside the LC elements, i.e. between the cell substrates
• CPC Class Codes: G02F 1/133638 Waveplates, i.e. plates with a retardation value of lambda/n
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 2201/44 Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements

Abstract

A flat panel display is disclosed. In one embodiment, the display includes a first substrate and an organic light emitting device formed over the first substrate, wherein the organic light emitting device comprises a first electrode layer, an organic light emitting layer, and a second electrode layer, and wherein the organic light emitting layer is interposed between the first and second electrode layers. The display also includes a second substrate attached to the first substrate by the use of a sealant and an In-Plane Switching (IPS) mode electrode layer formed between the first and second substrates, wherein the IPS mode electrode layer is closer to the second substrate than the first substrate, wherein the IPS mode electrode layer has first and second surfaces opposing each other, and wherein the first surface is closer to the second substrate than the first surface. The display further includes a first alignment layer formed on the second surface of the IPS mode electrode layer and a liquid crystal layer filled in a space formed between the first substrate and the second substrate, wherein at least part of the liquid crystal layer is formed over the organic light emitting device.

Claims

1. A flat panel display comprising:

a first substrate;

an organic light emitting device formed over the first substrate, wherein the organic light emitting device comprises a first electrode layer, an organic light emitting layer, and a second electrode layer, and wherein the organic light emitting layer is interposed between the first and second electrode layers;

a second substrate attached to the first substrate by the use of a sealant;

an In-Plane Switching (IPS) mode electrode layer formed between the first and second substrates, wherein the IPS mode electrode layer is closer to the second substrate than the first substrate, wherein the IPS mode electrode layer has first and second surfaces opposing each other, wherein the first surface is closer to the second substrate than the first surface, and wherein the width of the IPS mode electrode layer is substantially the same as the width of the organic light emitting device;

a first alignment layer formed on the second surface of the IPS mode electrode layer; and

a liquid crystal layer filled in a space formed between the first substrate and the second substrate, wherein at least part of the liquid crystal layer is formed between the IPS mode electrode layer and the organic light emitting device.

2. The display of claim 1, wherein at least one of the first electrode layer and the second electrode layer is formed at least partially of a reflective material and wherein the IPS mode electrode layer is formed at least partially of a transparent material.

3. The display of claim 1, wherein the liquid crystal layer is configured to display an image based on a voltage applied to the IPS mode electrode layer.

4. The display of claim 1, wherein the IPS mode electrode layer is electrically connected to an external terminal formed on the second substrate.

5. The display of claim 1, wherein the organic light emitting layer is configured to display an image based on a voltage applied to the first electrode layer and the second electrode layer.

6. The display of claim 1, wherein the first electrode layer and the second electrode layer are electrically connected to an external terminal formed on the first substrate.

7. The display of claim 1, further comprising a second alignment layer formed over the first substrate and the organic light emitting device, wherein the second alignment layer is aligned in substantially the same direction as the first alignment layer.

8. The display of claim 7, wherein the first and second alignment layers are aligned at about 45 degrees with respect to at least one of a first surface of the first substrate and a second surface of the second substrate, and wherein the sealant contacts the first surface of the first substrate and the second surface of the second substrate.

9. The display of claim 7, wherein the first and second alignment layers are formed at least partially of polyimide.

10. The display of claim 1, wherein the sealant is glass frit.

11. The display of claim 1, further comprising a linear polarization film, wherein the second substrate has first and second surfaces opposing each other, wherein the first surface of the second substrate contacts the sealant, and wherein the linear polarization film is formed over the second surface of the second substrate.

12. The display of claim 11, wherein the first electrode layer is formed at least partially of a reflective material, wherein the second electrode layer is formed at least partially of a transparent material and wherein the IPS mode electrode layer is formed at least partially of a transparent material.

13. The display of claim 11, further comprising an adhesive material formed between the second substrate and the linear polarization film.

15. The display of claim 1, wherein the liquid crystal layer and the organic light emitting device overlap each other in a direction extending from the first substrate to the second substrate.

16. The display of claim 1, wherein the liquid crystal layer is wider than the organic light emitting device.

17. The display of claim 1, wherein the sealant directly contacts the liquid crystal layer, and the first and second alignment layers.

18. The display of claim 1, wherein the first alignment layer covers and contacts three different surfaces of the IPS mode electrode layer.

14. A flat panel display comprising:

first and second substrates opposing each other;

an In-Plane Switching (IPS) mode electrode layer formed between the first and second substrates;

an organic light emitting layer formed between the first and second substrates;

a liquid crystal layer formed between the first and second substrates; and

a circuit configured to selectively drive the organic light emitting layer or liquid crystal layer so as to display an image,

wherein the width of the IPS mode electrode layer is substantially the same as the width of the organic light emitting layer, and

wherein at least part of the liquid crystal layer is formed between the IPS mode electrode layer and the organic light emitting layer.