Organic light emitting display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-2016233458-A1
Application number	US-201415022238-A
Country	US
Kind code	A1
Filing date	Apr 24, 2014
Priority date	Dec 31, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

The present disclosure relates to an organic light emitting display panel and a display apparatus. The organic light emitting display panel includes: a first substrate provided with a plurality of pixels each comprising an organic light emitting diode; a second substrate having at least one auxiliary electrode electrically connected to a cathode of the organic light emitting diode, each auxiliary electrodes being located on a side of the second substrate facing the first substrate and corresponding to a gap between adjacent pixels on the first substrate; and an antireflection layer formed on the auxiliary electrode for absorbing light rays directed to the auxiliary electrode. In the present disclosure, by the auxiliary electrode formed on the second substrate and electrically connected to the cathode on the first substrate, the voltage drop of the cathode may be significantly reduced, and the uniformity of the display brightness is improved. Meanwhile, by the antireflection layer formed on the auxiliary electrode, light leakage phenomenon due to reflection of a metal auxiliary electrode may be prevented, thereby improving contrast ratio of the display.

First claim

1 . An organic light emitting display panel, comprising:
a first substrate provided with a plurality of pixels each comprising an organic light emitting diode; a second substrate having at least one auxiliary electrode electrically connected to a cathode of the organic light emitting diode, each auxiliary electrodes being located on a side of the second substrate facing the first substrate and corresponding to a gap between adjacent pixels on the first substrate; and an antireflection layer formed on the auxiliary electrode for absorbing light rays directed to the auxiliary electrode.

2 . The organic light emitting display panel according to claim 1 , wherein the auxiliary electrode has a grid-like structure.

3 . The organic light emitting display panel according to claim 1 , wherein the material of the auxiliary electrode is selected from Al, Mo, Cu, Ag, Cr, Au, and combinations thereof.

4 . The organic light emitting display panel according to claim 1 , wherein the auxiliary electrode has a lower resistance than the cathode.

5 . The organic light emitting display panel according to claim 1 , wherein the antireflection layer covers a surface of the auxiliary electrode by an area larger than or equal to the surface area of the auxiliary electrode, and margins of the antireflection layer do not go beyond a non-display region located between the adjacent pixels.

6 . The organic light emitting display panel according to claim 1 , wherein the antireflection layer is made of black electrically conductive material, or mixed material containing black pigment and electrically conductive powder.

7 . The organic light emitting display panel according to claim 6 , wherein the black electrically conductive material comprises ruthenium oxide.

8 . The organic light emitting display panel according to claim 6 , wherein the black pigment of the mixed material comprises at least one of cobalt oxide, black-titanium, sub-titanium oxide and graphite, and the electrically conductive powder of the mixed material comprises at least one of Mo, Al, Cu, Ag, Ti and Fe.

9 . The organic light emitting display panel according to claim 1 , wherein a spacer is formed on the antireflection layer, the contact area between the spacer and the antireflection layer being less than the surface area of the antireflection layer.

10 . The organic light emitting display panel according to claim 9 , wherein a transparent conductive layer is formed on the surface of the antireflection layer and the spacer, the transparent conductive layer being in contact with the cathode so as to electrically connect the auxiliary electrode to the cathode.

11 . The organic light emitting display panel according to claim 10 , wherein the transparent conductive layer is made of any one of indium tin oxide and indium zinc oxide, or a combination thereof.

12 . The organic light emitting display panel according to claim 10 , wherein the transparent conductive layer is electrically connected to the cathode at the gap between the adjacent pixels on the first substrate.

13 . The organic light emitting display panel according to claim 1 , wherein the transparent conductive layer is arranged to totally cover the second substrate, and electrically connected to a surface of the antireflection layer facing the first substrate and a side surface of the auxiliary electrode.

14 . The organic light emitting display panel according to claim 1 , wherein the organic light emitting diode comprises a light emitting layer for emitting white light.

15 . The organic light emitting display panel according to claim 14 , wherein a display region of the second substrate comprises a red filtering layer, a green filtering layer, and a blue filtering layer.

16 . The organic light emitting display panel according to claim 1 , wherein the organic light emitting diode comprises a light emitting layer for emitting red light, green light or blue light.

17 . The organic light emitting display panel according to claim 1 , wherein the second substrate comprises a black matrix located between the adjacent pixels.

18 . The organic light emitting display panel according to claim 1 , wherein the first substrate further comprises a plurality of thin film transistors electrically connected to the organic light emitting diode.

19 . A display apparatus, comprising the organic light emitting display panel according to claim 1 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Shen Wulin
• Wang Dongfang
• Chen Haijing

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title