ORGANIC LIGHT EMITTING DIODE DISPLAY

• US 20120007106A1
• Filed: 02/23/2011
• Published: 01/12/2012
• Est. Priority Date: 07/07/2010
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jung, Woo-Suk, Park, Soon-Ryong, Park, Hye-Jung
• Application Number:
  US13/033,311
• Publication Number:
  US 20120007106A1
• Time in Patent Office: Days
• US Class Current: 257/88
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/80518 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/8793 Arrangements for polarized light emission H10K59/8791 takes precedence

Abstract

An organic light emitting diode (OLED) display according to an exemplary embodiment includes an organic light emitting display panel that includes an organic light emitting member, a polarizing plate that is spaced-apart from the organic light emitting display panel and arranged at an upper portion thereof, and a window that is attached to an upper portion of the polarizing plate and protects the organic light emitting display panel. The polarizing plate may include a linear polarizing member and a retardation film that is disposed under the linear polarizing member. According to the exemplary embodiment, the external light visibility can be improved by absorbing light that is incident on the lower portion of the polarizing plate by the polarizing plate by attaching the polarizing plate to the lower portion of the window and separating the polarizing plate from the organic light emitting display panel.

Claims

1. An organic light emitting diode (OLED) display, comprising:

an organic light emitting display panel that includes an organic light emitting member;

a polarizing plate spaced-apart from the organic light emitting display panel and arranged at an upper portion thereof; and

a window that is attached to an upper portion of the polarizing plate to protect the organic light emitting display panel.

2. The OLED display of claim 1, wherein the polarizing plate comprises:

a linear polarizing member; and

a retardation film arranged under the linear polarizing member.

3. The OLED display of claim 2, wherein the retardation film is a λ

/4 retardation film.

4. The OLED display of claim 2, further comprising a first adhesive layer that is arranged between the linear polarizing member and the window.

5. The OLED display of claim 3, further comprising a second adhesive layer arranged between the linear polarizing member and the λ

/4 retardation film.

6. The OLED display of claim 5, further comprising a protective film that is attached to a lower portion of the λ

/4 retardation film.

7. The OLED display of claim 1, wherein the organic light emitting display panel further includes a reflection electrode.

8. The OLED display of claim 7, wherein external light is reflected off the reflection electrode and absorbed by the polarizing plate.

9. The OLED display of claim 1, the polarizing plate being in direct contact with said window.

10. The OLED display of claim 2, wherein the organic light emitting display panel further includes a reflection electrode, wherein external light is reflected off the reflection electrode and is absorbed by the polarizing plate.

11. The OLED display of claim 10, the display to allow the external light to pass through the window and the polarizing plate from an outside, reflect of the reflection electrode of the organic light emitting display panel, and then convert the external light from a circularly polarized light to a linearly polarized light by passing through the retardation film of the polarizing plate for a second time, the linearly polarized external light then being absorbed by the linear polarizing member of the polarizing plate.

12. The OLED display of claim 11, the linearly polarized external light having a polarization axis that is orthogonal to a penetration axis of the linear polarizing member of the polarizing plate after said passing through the retardation film for said second time.