OLED DEVICE AND MANUFACTURING METHOD THEREOF AND DISPLAY PANEL APPLYING THE SAME

• US 20140332779A1
• Filed: 05/08/2014
• Published: 11/13/2014
• Est. Priority Date: 05/09/2013
• Status: Abandoned Application

• Current Assignee: Everdisplay Optonics (Shanghai) Limited
• Original Assignee: Everdisplay Optonics (Shanghai) Limited
• Inventors: LIN, Hsin Chih
• Application Number:
  US14/272,843
• Publication Number:
  US 20140332779A1
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/878 comprising reflective means

Abstract

An organic light emitting device relates to a WOLED based Top emission organic light emitting device and the manufacturing method thereof and a display panel which applies the organic emitting device. In the organic light emitting device, a plurality of emitting units are formed on a substrate and isolated respectively; a plurality of independent optical adjustment layers are formed between the reflective electrode and the transparent positive electrode of each emitting unit respectively; a color filter layer is formed above the emitting units. This embodiment applies the structure of WOLED into the top emission device, the mask having a maximum aperture ratio in the evaporation process, consequently, it improved yield rate of display panel manufacturing, reduced the costing of the evaporation process and improved the resolution of the display panel.

Claims

1. An organic light emitting device, comprising:

a plurality of emitting units separated from each other and formed on a substrate;

a reflective electrode formed on the substrate to upwardly reflect lights;

a color filter layer formed above the emitting units and consisting of several color areas corresponding to the emitting units for forming color channels of a preconfigured color system;

wherein, each emitting unit comprises a WOLED layer, and an independent optical adjustment layers served to adjust wave-length of the light emitted by the WOLED layer are formed between the WOLED layer and the reflective electrode.

2. The organic light emitting device as claimed in claim 1, wherein each emitting unit further comprises a semi-reflective negative electrode and a transparent electrode, and the WOLED layer is between the semi-reflective negative electrode and the transparent electrode.

3. The organic light emitting device as claimed in claim 2, wherein each color channel of the preconfigured color system is formed by an emitting light which is emitted from one of the emitting units and is passing through the corresponding color area.

4. The organic light emitting device as claimed in claim 3, wherein there are three emitting units formed on the substrate.

5. The organic light emitting device as claimed in claim 4, wherein the color filter layer consists of three color areas which are red-ray area, blue-ray area and green ray area.

6. The organic light emitting device as claimed in claim 1, wherein the reflective electrode is made of silver or aluminum.

7. The organic light emitting device as claimed in claim 2, wherein the Semi-reflective negative electrode is made of magnesium or silver or magnesium-silver alloy.

13. A display panel, wherein the display panel mainly consists of the organic light emitting device as claimed in claim 1.

14. The display panel as claimed in claim 13, wherein there are three emitting units formed on the substrate.

15. The display panel as claimed in claim 13, wherein the color filter layer consists of three color areas which are red-ray area, blue-ray area and green ray area.

16. The display panel as claimed in claim 13, wherein the reflective electrode is made of silver or aluminum.

8. A manufacturing method of organic light emitting device, comprising:

(a) forming a reflective electrode layer on a substrate;

(b) forming several optical adjustment layers separated from each other on the reflective electrode layer, and the number of the optical adjustment layers is identical with the number of the emitting units;

(c) forming a transparent electrode layer on the optical adjustment layer of each emitting unit;

(d) forming a WOLED layer on the transparent electrode layer of each emitting unit;

(e) forming a semi-reflective negative electrode layer on the WOLED layer of each emitting unit; and

(f) packaging the device formed in Step (e), and forming the color filter layer by means of sealing the top surface of the device with the color filters having preconfigured color areas.

9. The manufacturing method of organic light emitting device as claimed in claim 8, wherein the steps of forming the optical adjustment layers in step (b) comprises:

forming an optical adjustment layer integrally by means of PVD process or CVD process or CBD process; and

patterning the optical adjustment layer by photoetching process and etching process, which divides the adjustment layer into several parts separated from each other;

wherein, the thickness of the optical adjustment layer of the different emitting unit is not identical.

10. The manufacturing method of organic light emitting device as claimed in claim 8, wherein the formation of WOLED layers in Step (d) comprises:

unifying the thickness of the WOLED layer of each emitting unit by performing the evaporation process using the metal mask having a maximum aperture ratio.

11. The manufacturing method of organic light emitting device as claimed in claim 8, wherein the formation of semi-reflective negative electrode layers in Step (e) comprises:

unifying the thickness of the semi-reflective negative electrode layer of each emitting unit by performing the evaporation process using the metal mask having a maximum aperture ratio.

12. The manufacturing method of organic light emitting device as claimed in claim 8, wherein the packaging of the device in Step (f) comprises:

performing the thin film encapsulation process with inorganic coating or inorganic water-resistive coating;

performing the cofferdam process and the filling process;

completing the packaging by gluing the substrate to a backboard having color filters.