Organic light emitting diode display

• US 8,253,128 B2
• Filed: 12/18/2009
• Issued: 08/28/2012
• Est. Priority Date: 01/07/2009
• 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, Eun-Ah, Jeong, Chul-Woo, Jeon, Hee-Chul, Kwak, Noh-Min, Jung, Woo-Suk, Lee, Joo-Hwa, Jeong, Hee-Seong, Park, Soon-Ryong
• Primary Examiner(s): Ho, Anthony
• Application Number:
  US12/642,732
• Publication Number:
  US 20100171105A1
• Time in Patent Office: 984 Days
• Field of Search: 257/40, 257/59, 257/72, 257/E51.001
• US Class Current: 257/40
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

An organic light emitting diode display includes a substrate, a thin film transistor on the substrate and including a gate electrode, a source electrode, and a drain electrode, a planarization layer on the thin film transistor and having a contact hole exposing a portion of one of the drain electrode or the source electrode, a pixel electrode on the planarization layer and coupled to the one of the drain electrode or the source electrode through the contact hole, a colored pixel defining layer on the planarization layer and including an opening exposing at least a portion of the pixel electrode, and a colored layer on the pixel electrode and the pixel defining layer and having a chromatic color different from a chromatic color of the pixel defining layer.

Claims

1. An organic light emitting diode display comprising:

a substrate;

a thin film transistor on the substrate and comprising a gate electrode, a source electrode, and a drain electrode;

a planarization layer on the thin film transistor and having a contact hole exposing a portion of one of the drain electrode or the source electrode;

a pixel electrode on the planarization layer and coupled to the one of the drain electrode or the source electrode through the contact hole;

a colored pixel defining layer on the planarization layer and including an opening exposing at least a portion of the pixel electrode; and

a colored layer on the pixel electrode and the pixel defining layer and having a chromatic color different from a chromatic color of the pixel defining layer.

2. The organic light emitting diode display of claim 1, further comprising:

an organic emission layer on the pixel electrode; and

a common electrode on the organic emission layer,

wherein the colored layer comprises a covering layer on the common electrode for protecting the organic emission layer.

3. The organic light emitting diode display of claim 1, wherein the colored layer comprises a sealing member on the substrate, and wherein the pixel electrode and pixel defining layer are between the sealing member and the substrate.

4. The organic light emitting diode display of claim 1, further comprising:

an organic emission layer on the pixel electrode;

a common electrode on the organic emission layer; and

a sealing member on the substrate,

wherein the common electrode is between the substrate and the sealing member, and

wherein the colored layer comprises a filling layer between the sealing member and the common electrode.

5. The organic light emitting diode display of claim 1, further comprising a sealing member on the substrate, wherein the pixel electrode and pixel defining layer are between the sealing member and the substrate, and wherein the colored layer comprises a covering window on the sealing member.

6. The organic light emitting diode display of claim 1, wherein the color of the pixel defining layer mixed with the color of the colored layer reduces brightness of light passing through both the pixel defining layer and the colored layer.

7. The organic light emitting diode display of claim 6, wherein the color of the pixel defining layer is in a complementary relationship with the color of the colored layer based on subtractive color mixing.

8. The organic light emitting diode display of claim 6, further comprising a conductive layer comprising a same material as at least one of the gate electrode, the source electrode, or the drain electrode, wherein the conductive layer is on a substantially same plane and formed by utilizing a substantially same process as the at least one of the gate electrode, the source electrode, or the drain electrode, and wherein at least a portion of the conductive layer overlaps with the pixel defining layer.

9. The organic light emitting diode display of claim 8, wherein the conductive layer comprises at least one of a gate line, a data line, a power line, or a capacitor plate.

10. The organic light emitting diode display of claim 6, wherein the mixing of the color of the pixel defining layer and the color of the colored layer creates a substantially black color.

11. The organic light emitting diode display of claim 1, wherein the color of the pixel defining layer is a yellow-based color, and the color of the colored layer is a blue-based color.

12. The organic light emitting diode display of claim 1, wherein the color of the colored layer provides color filtering for improving color efficiency of a selected color in a portion of the colored layer overlapping the exposed portion of the pixel electrode.