Organic light emitting display panel and method of manufacturing the same

• US 10,056,434 B2
• Filed: 02/23/2017
• Issued: 08/21/2018
• Est. Priority Date: 03/18/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kitabayashi, Atsushi
• Primary Examiner(s): Lebentritt, Michael
• Application Number:
  US15/440,955
• Publication Number:
  US 20170162633A1
• Time in Patent Office: 544 Days
• Field of Search: None
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• 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 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/30 Devices specially adapted for multicolour light emission
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating

Abstract

An exemplary embodiment discloses an organic light emitting display panel including a base substrate comprising first pixels configured to emit a light having a first wavelength and second pixels configured to emit a light having a second wavelength and a pixel definition layer disposed on the base substrate. The pixel definition layer includes first and second openings. The first opening corresponds to light emitting areas of n (n is a natural number equal to or greater than 2) first pixels among the first pixels. The second opening corresponds to light emitting areas of m (m is a natural number equal to or greater than 1 and smaller than n) second pixels among the second pixels. An area of the light emitting area of each of the first pixels is smaller than an area of the light emitting area of each of the second pixels.

Claims

1. An organic light emitting display panel, comprising:

a base substrate comprising a plurality of pixels configured to emit a light; and

a pixel definition layer disposed on the base substrate, the pixel definition layer comprising a plurality of openings,

wherein at least one first opening, among the plurality of openings, corresponds to light emitting areas of n (n is a natural number equal to or greater than

     2) pixels among the plurality of pixels.

2. The organic light emitting display panel of claim 1, wherein wavelengths of light emitted by the n pixels are all the same.

3. The organic light emitting display panel of claim 2, wherein at least one second opening, among the plurality of openings, corresponds to light emitting areas of m (m is a natural number equal to or greater than 1 and smaller than n) pixels among the plurality of pixels.

4. The organic light emitting display panel of claim 3, wherein wavelengths of light emitted by the m pixels are all the same.

5. The organic light emitting display panel of claim 4, wherein an area of the light emitting area of each of the n pixels is smaller than an area of the light emitting area of each of the m pixels.

6. The organic light emitting display panel of claim 5, wherein the wavelengths of light emitted by the n pixels are longer than the wavelengths of light emitted by the m pixels.

7. The organic light emitting display panel of claim 6, wherein the light emitting area of each of the n pixels is defined by an area in which a first anode disposed on the base substrate is overlapped with a first light emitting layer disposed on the first anode, and the light emitting area of each of the m pixels is defined by an area in which a second anode disposed on the base substrate is overlapped with a second light emitting layer disposed on the second anode.

8. The organic light emitting display panel of claim 7, wherein the at least one first opening corresponding to light emitting areas of the n pixels is configured to expose the n first anodes and areas defined between the n first anodes of the base substrate, and the at least one second opening corresponding to light emitting area of the m pixels is configured to expose the m second anodes and areas defined between the m second anodes of the base substrate.

9. The organic light emitting display panel of claim 7, wherein the first light emitting layer and the second light emitting layer are formed by an inkjet printing method or a solution process.

10. The organic light emitting display panel of claim 4, wherein the n is 4 and the m is 2.

11. The organic light emitting display panel of claim 4, wherein the n pixels are arranged in a first line, the m pixels are arranged in a second line, and an arrangement direction in which the n pixels are arranged is equal to the arrangement direction in which the m pixels area are arranged.